Construction Scheme Research Articles

Разработка вибрационного рабочего органа глубокорыхлителя

The article considers the design of a vibrating working body of a subsoiler, developed for a method of tillage that improves energy and agrotechnical performance. Deep loosening of the soil allows to improve the quality of tillage. Based on the results of the analysis of the working bodies of the tools and methods for reducing the traction resistance of deep diggers (according to the type of working body, the layout of the working bodies on the frame of the tool, the use of vibration of the working bodies), a design solution is proposed that will significantly reduce the traction resistance of the soil to the working body, – the use of vibration in the proposed design using vibrators, which will allow, including It is necessary to reduce energy costs when performing basic tillage. The study of the properties of cultivated soils using vibration made it possible to substantiate, in accordance with the purpose set in the work, a constructive scheme for transmitting vibration to the working body of a tillage. A mathematical model is proposed for determining the traction resistance of a deep loader, which allows calculating the magnitude of the forces acting on the rack of the working body, as well as on a component of its design – a vibrating chisel. The refinement of the traction resistance of the chisel by the resulting centrifugal force of inertia of its rotating element (eccentric) makes it possible to assess the degree of vibration of the working body on the soil. When determining the parameters of the mathematical model, the values of the parameters of the working bodies of deep-diggers and chisels in the conditions of stony soils of the Southern Urals were used. For the calculated scheme of the working body, its design parameters were determined, and a significant decrease in the traction resistance of the chisel gun using a vibrating chisel was obtained. An experimental study of the designed and manufactured prototype of a working organ with a vibrating chisel, conducted in laboratory conditions in accordance with an updated methodology, confirmed the calculated data on reducing traction resistance and improving agrotechnical soil parameters.

Research on Low-Carbon Energy Construction Scheme for Typical Parks in the Lancang-Mekong Region

Industrial parks serve as vital spatial carriers for economic and industrial development, exerting significant impacts on energy consumption and carbon emissions across nations. In order to promote green development in the Lancang-Mekong region, this research focuses on typical industrial parks in Laos, Thailand, and Vietnam. It analyzes the primary conditions of energy system construction, the structure of energy consumption, energy demand, and carbon emission trends in these parks. By considering local policies, development plans, and energy transition goals, the study assesses the development needs of energy consumption in the parks. It proposes differentiated schemes for constructing low-carbon energy systems in industrial parks, aiming to serve as a reference and guidance for the low-carbon energy transformation of typical industrial parks in the Lancang-Mekong region.

First-principles-based microkinetic modeling of methanol steam reforming over Cu(111) and Cu(211): structure sensitive activity and selectivity.

The development of hydrogen energy is widely recognized as a key approach to addressing the energy and carbon emission challenges. Methanol steam reforming is a promising hydrogen production scheme that can provide high-purity hydrogen. In this work, we studied the primary reaction mechanisms of methanol steam reforming over the Cu(111) and Cu(211) surfaces using density functional theory (DFT) calculations and microkinetic simulations. A detailed kinetic perspective on the reaction mechanism, which is often overlooked in previous research that relies solely on DFT calculations, is provided in the current work. Our findings reveal that under typical experimental conditions, the dominant mechanism on the Cu(111) surface is the methyl formate mechanism, while the H2COO dehydrogenation mechanism is dominant on Cu(211). The activity over the Cu(111) surface was slightly higher than that over Cu(211). Based on the degree of rate control analysis results, a reaction rate equation was derived to quantitatively explain the trend of activity under different operating conditions. It was also found that CO2 selectivity was significantly higher over Cu(211) than over the Cu(111) surface. Furthermore, based on the Wulff construction scheme, copper nanoparticle models with different sizes were constructed, and a detailed structure sensitivity study was executed. This comprehensive investigation sheds light on the mechanisms of methanol steam reforming reactions over the Cu(111) and Cu(211) surfaces, providing essential insights for the design of high-performance catalysts for hydrogen production.

Q-BLPP: A Quality-Enabled Bilateral Location Privacy-Preserving Service Construction Scheme in Mobile Crowd Sensing

Q-BLPP: A Quality-Enabled Bilateral Location Privacy-Preserving Service Construction Scheme in Mobile Crowd Sensing

Entity Extraction for Research and Development Project Knowledge Graph

In the process of constructing a knowledge graph for research and develop (R&D) projects, entity extraction for R&D project abstracts helps to quickly understand project content and promote the application and transformation of research results. This article adopts a scientific entity recognition model based on BERT-IDCNN-CRF (BERT combined with Iterative Dilated Convolutional Neural Network and Conditional Random Field) for the entity extraction task in the construction of knowledge graph for R&D projects. This model uses BERT to extract semantic representations from abstract texts, and then uses IDCNN to deeply capture local and global features in the text. Combined with CRF to learn the context transfer relationship between text labels. Finally it achieved the precision of 69.3%, the recall of 65.8%, and the F1-score of 67.5% in scientific entity recognition. On the basis of this model, this article proposes a knowledge graph construction scheme for R&D projects, and constructs a knowledge graph centered on R&D projects, which includes 12 kinds of entities and 13 kinds of relationships.

Application of Artificial Intelligence Technology in Bridge Construction and Maintenance

Artificial intelligence (AI) can extract valuable information from analyzing and learning among large amounts of data from bridge. In recent years, the researches and applications of AI in the field of bridge construction and maintenance are gradually increasing with the development of AI. This paper aims to summarize the application of AI in bridge construction and maintenance in recent years. Results show that AI technology can simulate and predict materials and construction scheme and promote the development of material science. In terms of intelligent detection, AI enables automated, efficient, and precise bridge inspection through technologies like visual machines and deep learning. Furthermore, in the realm of intelligent disaster prevention, early warning systems for potential bridge disasters can be achieved via big data analysis and predictive models. In the future, the design, construction and maintenance of Bridges will be increasingly combined with AI technologies, thus making the construction and management of Bridges more information-based and intelligent.

Path Inference based on Voronoi Graph for Unmanned Maritime Vehicles

Design/methodology/approachWe propose a novel path inference approach based on Voronoi graph for unmanned maritime vehicles (UMV). We model the two-dimensional space with a flexible construction scheme of Voronoi graph, represent the inter-cell shortest distance with a delicate calculation of cell diameters, and infer the potential qualified navigation paths of UMVs w.r.t. the specified distance constraint based on a diameter path model with an efficient depth-first exploration algorithm. PurposeExisting path planning approaches are generally focused on finding a single optimal path. However, in many practical scenarios, such as UMV patrolling and search and rescue, it is the comprehensiveness rather than the optimality that matters for the UMV paths. Inspired by the above problem, we propose a path inference method based on Voronoi graph to infer all the possible UMV paths satisfying the distance constraint. FindingsExperimental results indicate that our path inference approach based on Voronoi graph is able to perform more delicately and efficiently than the traditional path planning approach in terms of both space modeling and path exploration. The paths identified by our path inference method were more precise in distance estimation as well as more comprehensive when compared with the grid-based path planning method. In the simulated scenario of UMV search & rescue, we obtained the coverage rates of 63.14% and 100% against those of 14.5% and 81.07% for the grid-based method. Originality/valueOur path inference approach is able to provide valuable insights in various practical UMV applications.

Erection strategy for main cable based on unstrained length of parallel wire strands

This paper presents a construction scheme aimed at achieving one-time erection of strands through precise control of the unstrained length. The scheme entails correcting system errors through the initial strand erection and reducing the influence of random errors by improving manufacturing conditions and increasing field measurements. The key objective is to control cable erection using cable length. A reliability analysis program was developed to assess the accuracy of the main cable installation. A case study of an actual bridge was conducted to verify the feasibility of the scheme. First, an assessment of the distribution characteristics of the random variables was performed. Subsequently, a comparative analysis was performed to evaluate the reliability of the proposed scheme against conventional erection methods. Finally, the new method was validated by on-site installation of several strands. Results revealed that while the reliability of cable formation shape was comparable between the traditional method and the proposed scheme, the latter exhibited superior uniformity of internal force among cable strands after formation. In addition, the average value of the cable length correction for Nos. 2 to 15 strands closely aligns with that of the reference strand, suggesting that the systematic error correction determined by the reference strand exhibits relatively high accuracy. Furthermore, strands erected with cable length as the control objective effectively maintained sag errors within the range of [− 4 mm, 8 mm], demonstrating a high level of precision.

Low-carbon effects of constructing a prefabricated subway station using a trenchless method: A case study in Shenzhen, China

The traditional open-cut construction method for subway stations poses significant social and environmental challenges, and a trenchless method represents a promising alternative. This study uses the construction of a subway station in Shenzhen using a trenchless pipe-jacking method, as a case study. The design concept and construction scheme of the station are presented in detail, and the technical benefits of the technology are analysed. To assess the low-carbon effects of the method, this study uses life cycle assessment (LCA) theory. The findings indicate that the greenhouse gas (GHG) emissions of the station constructed this way are 10.5% less than those of the open-cut cast-in-situ (CIS) method. This decrease is attributable to reduced GHG emissions of 9.39% and 20.14% from building materials and related to energy consumption, respectively, achieved by reducing material consumption and improving electrification. Soil reinforcement engineering at the launching and receiving shafts is a significant factor affecting 34.17 % of the GHG emissions of the trenchless method, primarily owing to the significant cement consumption. The trenchless construction method used for the middle part of the station, which is beneath a large box culvert section, can decrease GHG emissions by 52.66% compared with open-cut CIS schemes. This is due mainly to the avoidance of additional GHG emissions resulting from the relocation of large box culverts required before open-cut construction of the station. Trenchless method, therefore, offers many advantages in reducing emissions and generating social benefits in complex urban environments compared with open-cut method, making it an essential approach to assist sustainable underground space development.

CONSTRUCTIVE SOLUTIONS FOR EXPLOSION-RESISTANT BUILDINGS WITH CIVIL PROTECTION FACILITIES

In the conditions of the large-scale war led by russia in Ukraine, the issue of designingblast-resistant buildings with civil defense facilities that can withstand additional special loads and impacts has become crucial. These impacts include artillery and missile attacks, bomb explosions, blast waves, and the spread of fires, among others. An analysis of the consequences of building and structure destruction resulting from military operationsindicates that reinforced concrete structures of buildings have superior load-bearing capacity compared to traditional brick and steel frames of pavilion-type buildings.Reinforced concrete is a non-combustible material with significant mass, improving its inertialresistance. It possesses high strength and plasticity characteristics, allowing it to deform and redistribute forces between adjacent structures, thereby preventing progressive collapse – the cascading destruction of buildings.The main principles of designing blast-resistant reinforced concrete frames for high-rise buildings involve rational constructive systems and schemes with simple and compact configurations and symmetrical plans. The structural solution of the reinforced concrete frame must ensure the redistribution of gravity loads between adjacent structures. Therefore, the joints of vertical and horizontal structures must be plastic, capable of dissipating a significant amount of explosion energy. The load-bearing elements of buildingstructures must withstand cycles of large deformations in different directions, such aspressures from the lifting of floor slabs opposing ordinary gravity loads. For buildings classified with medium (CC2) and significant (CC3) consequences, where more than 50 individuals are constantly present or periodically more than 100 people, it is necessary to design civil protection premises. These premises should be strategically located below the planned ground level.The construction of civil protection premises located in the underground floors of an explosionproof building must withstand all types of main and episodic loads and impacts and resist the spread of fire. Building frames with monolithic reinforced concrete ribbed ceilings and systems of main and secondary beams or transversely located beams rigidly fixed to vertical supporting structures – columns, pylons, walls – can withstand such loadsbest. The article investigates the reasons for the destruction of reinforced concrete slabs in high-rise frame monolithic buildings when subjected to bending or pressure from explosive loads below. It also explores the potential twisting of the building as a result of reverse explosive effects.The article presents measures to strengthen sections of floor structures in high-rise framemonolithic buildings that may be destroyed due to reverse explosive loads and upward pressure from explosive forces. The expediency of reinforcing critical areas of monolithic reinforced concrete floor slabs with external reinforcement – adhering reinforcing mats in the form of fabrics, lamellas, or carbon fiber nets to the upper zones of slabs near vertical supports – is justified.

The influence of the parameters of engineering protective structures on the effectiveness of their use in densely built-up territory

A study of the influence of application of an engineering protective screen made of small-diameter driven piles on the existing building deformations, caused by the arrangement of the pit fence made of bored piles, was carried out. The study was carried out with the help of numerical modeling using the method of finite elements, which allowed to display the work of the system "soil base - engineering protective structures - the foundation of the existing building" with different parameters of the protective screen. The influence of the following parameters is shown:
 1) the depth of laying the protective screen L in relation to the depth of the compressible soil zone (Hst).
 2) the position of the protective screen between the retaining structures of the pit and the existing building.
 3) rigidity of the screen – the ratio of the step to the diameter of the piles of the engineering protective screen.
 4) the distance between the existing building and the pit in relation to the depth of the enclosing structures of the pit of the new construction.
 The tasks were modeled in a spatial arrangement with the task of the system "soil base - enclosing constructions of the pit - protective screen - foundations of the existing building". The soil environment was modeled using the Hardening Soil Model. The calculation was carried out in stages.
 The variation of the parameters of the protective screen was carried out for the historical building, which in most cases was made according to a rigid wall construction scheme with strip foundations.
 The foundation depth is 1.2 - 3.0 m and the foundation width is 1-2 m. The average pressure under the foundation is 150-250 kPa.
 The rational depth of the foundation and the position of the protective screen between the existing building and the pit of the new construction were established.
 The area of effective application of the protective screen was revealed, depending on the distance between the building and the pit fence.
 The effective stiffness is established depending on the change in the relative distance between the poles of the protective screen.

Optimization method for the length of the outsourcing concrete working plane on the main arch rib of a rigid-frame arch bridge based on the NSGA-II algorithm

In addressing the challenges of determining the length of the outsourcing concrete working planes on the main arch rib of rigid-frame arch bridges—a process often reliant on extensive engineering experience, large-scale manual calculations and lack of multi-objective control. This paper employs the NSGA-II multi-objective optimization algorithm, where the objective functions are set to minimize the maximum compressive stress, tensile stress, and vertical deformation of the arch crown after the bridge was built. Optimization studies of the outsourcing concrete working plane length were conducted in different pouring schemes. Based on the case study of a main arch rib specimen with a span of 60 m, the optimal results for different construction schemes were derived. The uneven stress distribution coefficient of key sections was used as the evaluation index to filter the Pareto-optimized solutions from the NSGA-II optimization results. The experimental results indicated that: (1) Compared with the original pouring scheme, the optimized scheme respectively reduced the structure's maximum compressive stress, tensile stress, and vertical deformation of the arch crown by 4.19 MPa, 0.12 MPa, and 1.74 mm, showing a decline of 24.19%, 19.67%, and 2.82%. (2) Seven distinct outsourcing concrete pouring schemes were devised by altering the number of working planes, segments per working plane, and concrete pouring direction. All schemes achieved favorable optimization results through length optimization, demonstrating the broad applicability of the NSGA-II algorithm. (3) The stress distribution coefficients non-uniformity for the outsourcing concrete of the main arch rib are mostly located in the range of [0.7, 0.8], surpassing the original scheme's 0.69. Therefore, the NSGA-II algorithm not only ameliorates the primary arch rib's stress condition and diminishes the arch crown's vertical deformation, but also elevates the post-construction stress distribution state of the bridge's outsourcing concrete.

Development of Feed Expander

The development's objective is to increase productivity and reduce energy consumption in the execution of the technological process of expanded feed preparation while ensuring the necessary quality and safety of the expandates. The rationale for the construction and technological scheme of the feed expander with an improved shaping nozzle has been provided. This nozzle differs in that it consists of a narrowed area of the cylinder, a concave cone, and a crown nut. When heated plasticized mass is moved into the narrowed area of the shaping nozzle, there is an increase in pressure, followed by a sharp decrease after it passes through. This is achieved by increasing the working volume due to the shape of the concave cone. As a result, the plasticized mass expands and exits through the crown nut, forming expandates. Through numerical modelling, the dynamics and distribution of feed mixture components in the cavity between the cylinder of the shaping nozzle and the cone have been determined based on the force of pressure and the force of contact interaction between feed components. This dependence on the radius of narrowing of the cylinder of the shaping nozzle, the radius of the concave cone, and the distance between the cone and the cylinder have been established. Regression equations for the density of the plasticized feed mixture components at the outlet of the shaping nozzle and the maximum pressure required to extrude the plasticized feed components through the shaping nozzle along their movement direction from the specified research factors have been derived. As a result of experimental studies of the compact feed expander, dependencies of the changes in expander productivity, power consumption, the specific energy consumption of the expansion process, and the density of obtained expatriates have been established to the moisture content of the compound feed, the gap between the cone and the nut, and the screw rotation speed.

Efficient and Parallel Implementation of Real and Complex Response Functions Employing the Second-Order Algebraic-Diagrammatic Construction Scheme for the Polarization Propagator.

We present the implementation of an efficient matrix-folded formalism for the evaluation of complex response functions and the calculation of transition properties at the level of the second-order algebraic-diagrammatic construction (ADC(2)) scheme. The underlying algorithms, in combination with the adopted hybrid MPI/OpenMP parallelization strategy, enabled calculations of the UV/vis spectra of a guanine oligomer series ranging up to 1032 contracted basis functions, thereby utilizing vast computational resources from up to 32,768 CPU cores. Further analysis of the convergence behavior of the involved iterative subspace algorithms revealed the superiority of a frequency-separated treatment of response equations even for a large spectral window, including 101 frequencies. We demonstrate the applicability to general quantum mechanical operators by the first reported electronic circular dichroism spectrum calculated with a complex polarization propagator approach at the ADC(2) level of theory.

An Experimental Study on Flexural-Shear Behavior of Composite Beams in Precast Frame Structures with Post-Cast Epoxy Resin Concrete

Epoxy resin concrete has superior mechanical properties compared to ordinary concrete, and will play an increasingly important role in urban construction. In this paper, the application effect and prospect of epoxy resin concrete in precast composite frame structures are discussed. Taking the joint surface of the old and new concrete at the end of the composite beam as the research object, three specimens were devised and fabricated. Subsequently, a horizontal cyclic load test was conducted, and the seismic performance indices were analyzed. Multiple finite element models were established to assess the influence of precast concrete strength, the diameter of the longitudinal bar of the beam, the shear span ratio, and the epoxy resin concrete post-cast area, among other factors, on the seismic performance of the beam end. Four findings indicate the following: Firstly, epoxy resin concrete, characterized by its high performance attributes, can be used as a post-cast material in precast concrete structures. Secondly, when the strength of the post-cast epoxy concrete approximates or slightly exceeds that of the precast concrete, and the ratio of longitudinal reinforcement and shear span ratio are appropriately balanced, the operational performance of the composite beam frame structure is enhanced. In addition, when post-cast epoxy resin concrete is employed in the beam-column joint area, the mechanical performance of the composite beam end in the joint area matches or even surpasses that of the structure that was cast in situ. And subsequently, the expansion of post-cast area resulted in better mechanical performance. Finally, when the area of post-cast epoxy resin concrete is a non-node area, the mechanical properties of the composite beam end are worse than the former. However, the amount of epoxy resin concrete used will be greatly reduced, and as the precast node area expands, the bearing capacity of the beam end will increase and gradually approach the cast-in situ structure, indicating that this construction scheme also has advantages.

Comparative analysis of production systems in the automotive industry

Purpose of the following text is to compare three production systems,: Toyota Production System, World Class Manufacturing and Nissan Production Way. For it purpose, a comparative study was carried out based on three categories: system, design, popularity and versatility. For each of the comparison categories, a method was adjusted. System design: comparison of assumptions and system construction schemes according to the authors of a given solution. Popularity: analysis of search engine results from Google, Google Scholar, Bing and Yahoo! obtained from searches for the phrases "Toyota Production System," "World Class Manufacturing" and "Nissan Production Way". Versality: case studies of system implementations by other organisations than authoring automotive corporations. As a result of the comparison, it can be seen that the most complex and elaborate system is WCM, which has a multi-element structure as well as predetermined levels of sophistication. Relatively the simplest of the compared solutions turned out to be NPW. In the case of popularity, the leader is TPS in Google’s search engines, WCM in Bing and Yahoo!, while the least popular solution in the Internet’s space is the system by Nissan Motor Corporation. The versatility category indicates that the TPS and WCM systems have similar implementation capabilities, while NPW turns out to be a specific and exclusive solution for the Renault-Nissan-Mitsubishi Alliance and has no external implementations. The results provide an overall picture of the situation regarding production systems in the automotive industry and can provide a starting point for more advanced analysis of existing solutions and allow the design of other systems.

SideNet: Learning representations from interactive side information for zero-shot Chinese character recognition

Existing methods for zero-shot Chinese character recognition usually exploit a single type of side information such as radicals, glyphs, or strokes to establish a mapping with the input characters for the recognition of unseen categories. However, these approaches have two limitations. Firstly, the mappings are inefficient owing to their complexity. Some existing methods design radical-level mappings using a non-differentiable dictionary-matching strategy, whereas others construct sophisticated embeddings to map seen and unseen characters into a unified latent space. Although the latter approach is straightforward, it lacks a learnable scheme for explicit structure construction. Secondly, the complementarity within multiple types of side information has not been effectively explored. For example, the radicals provide structural knowledge at an abstract level, whereas glyphs offer detailed information on their figurative counterparts. To this end, we propose a new method called SideNet that jointly learns character-level representations assisted by two types of interactive side information: radicals and glyphs. SideNet contains a structural conversion module that extracts radical knowledge via dimensional decomposition, and a spatial conversion module that encodes the radical counting map to produce an interactive outcome between radicals and glyph. Finally, we propose a new classifier that integrates the converted features by a similarity-guided fusion mechanism. To the best of our knowledge, this study represents the first attempt to integrate these two types of side information and explore a joint representation for zero-shot learning. Experiments show that SideNet consistently outperforms existing methods by a significant margin in diverse scenarios, including handwriting, printed art, natural scenes, and ancient Chinese characters, which demonstrates the potential of joint learning with multiple types of side information.

Fluctuations of discharge and hydropower potential in the upper Amu Darya under the background of climate change

Study RegionUpper Amu Darya (UAD). Study FocusThe UAD has abundant hydropower potential (HP). This study focuses on the potential sites of small hydropower stations (sHPs) and explores the impact of future climate change on discharge and HP. New Hydrological Insights for the RegionThe conflict between water resources and hydropower in Central Asia is a key issue affecting regional development. Developing sHPs provides a new direction for alleviating energy shortages in Central Asia. Combining the hydrological model with the geographic information decision-making method, we have determined the potential sites for ten sHPs in the UAD and calculated the HP for each station. Based on future climate data from two shared socioeconomic pathways and four global climate models, we found that future precipitation and temperature are projected to increase, with precipitation increasing mainly in spring and winter. The average discharge will increase by 19.1∼36.6% in the near-term (2031–2050) and by 29.7∼106.8% in the long-term (2071–2090). In addition, climate change has significantly increased HP in winter, and the increase of HP in relatively high altitudes is higher than that in low altitudes. This implies that the HP development prospect of UAD is broad in future, but for sHPs construction schemes, it is necessary to further consider the impact on both environment and society.

Comparison and Selection of Multiple Construction Schemes for the Large-Span and Heavy-Load Transfer Truss

The main building of Zone II of Zhanjiang Bay Laboratory R&D Building adopts a steel frame–core tube shear wall structure system, with a 53.4 m large-span and heavy-load-transfer truss on the fourth floor. In order to propose the optimal construction and installation scheme for the large-span and heavy-load-transfer truss, the simplified model, single model, and 3D model are utilized to compare Scheme 1 with rigid connection and Scheme 2 with elastic connection and rigid connection. After completing the construction of the underground layer and towers on both sides, in Scheme 1, the fourth-floor transfer truss is directly connected to the towers on both sides in a rigid manner. Subsequently, the support at the bottom of the transfer truss is removed, allowing for layer-by-layer construction. The transfer truss remains rigidly connected to both side towers throughout. On the other hand, in Scheme 2, initially, the transfer truss is connected to both side towers through upper chords and diagonal bars before being constructed upwards until reaching the sixth floor. Once formed as a whole with two floors above using large diagonal tie rods, lower chords of the large-span and heavy-load-transfer truss are then connected with another diagonal bar to establish a rigid connection between the transfer truss and towers; thereafter, upward construction continues. Following completion of constructing a seven-story large diagonal tie rod, whereupon removal of support at the bottom of the conversion truss occurs, subsequent layer-by-layer construction takes place accordingly. It has been observed that employing Scheme 2 can enhance stress distribution within core barrel shear walls as well as transfer trusses while ensuring deflection and stress levels meet requirements for the large-span and heavy-load-transfer truss, thereby rendering structural stress more rationalized, leading to significantly improved overall safety.

Research on programmatic multi-attribute decision-making problem: An example of bridge pile foundation project in karst area.

The selection of construction plans for adverse geological conditions frequently encountered during the construction of bridge pile foundations will have a significant impact on the project's progress, quality, and cost. There is a need for the optimization of multi-attribute decision-making methods, considering the subjectivity in in weight allocation and the practical implementation obstacles. In this study, an evaluation framework for pile foundation construction schemes in karst areas was established. The directed graph and Bellman-Ford algorithm are employed to improve the Analytic Network Process (ANP) in the systematic structure, thereby calculating the subjective weights of various indicators. Simultaneously, based on the concept of dynamic weighting, a multiple linear regression is introduced for analyzing the weights of similar projects, resulting in the derivation of universal weights for the primary indicators within the evaluation system. The combination weights are subsequently determined through the weighted average of the two types of weights. Finally, the comprehensive scores of alternative schemes are computed using the grey-fuzzy evaluation method to enable decision-making in scheme selection. Cloud model, ELECTRE-II, and VIKOR methodologies were utilized for the comparison of results. Combining with a case study of a bridge project in karst development area in southern China, the findings indicate that the improved ANP method possesses practical applicability and yields effective computational results. The introduction of universal weights serves to ameliorate the inherent subjectivity in weight allocation. The pile foundation quality achieved using the optimal construction plan is classified as Class I, which prove the feasibility of the model.