Building Foundations Research Articles

Analytical solution to 2D dynamic soil-tunnel-building interaction under seismic SH-wave excitation considering the influence of the stiffness of tunnel and building's foundation

This investigation examines the structure-soil-structure interaction (SSSI) problem between a tunnel and nearby aboveground building, considering the impact of the stiffness of tunnel and building's foundation. A two-dimensional (2D) model is utilized, which includes a flexible circular tunnel and a three-story building anchored by a flexible semi-circular foundation embedded in a homogeneous half-space. The response of the system to incident plane SH-wave excitation is solved analytically using the wave function expansion method. The analysis focuses on how the system response is affected by the stiffness of the tunnel and the building's foundation. Tunnel stiffness plays a leading role in tunnel response analysis. The model with a rigid tunnel and rigid foundation can offer a reasonable system response overall, but it fails to accurately represent tunnel deformation and stress distribution. Depending on the stiffness of the building's foundation, the maximum value of the inter-story displacement of the first floor can be overestimated by around 70 %, with even greater overestimations for higher floors. The results help understand observed seismic behaviors and provide insight into the effects of foundation and tunnel stiffness on the tunnel-building interaction system.

From Oil to Information

This paper traces the history of architecture-engineering firm Caudill Rowlett Scott (CRS), roughly 1948–1983, in the context of the postwar oil economy and the 1973 energy crisis. The paper examines CRS’s transformation from a design firm into an energy conglomerate over the course of three decades, as it both concretized the fossil economy between Houston and Saudi Arabia and modeled its own corporate structure after its oil clientele. Analyzing numerous CRS projects designed and built for the oil industry, from corporate office towers to industrial training colleges, the paper looks at a moment in which energy systems and the architectural profession were coproduced through the discourses, practices, and institutions of oil at its most vulnerable historical inflection points. CRS thereby epitomized an energy transition from oil as a substance to oil as information, where a growing postindustrial society would leverage the immaterial dimensions of energy as a foundation for building.

Chemical Memory in Primitive Organisms: Evolutionary Insights and Mechanistic Perspectives

Memory, the cornerstone of adaptive behavior, has been extensively studied within the confines of neural systems. A comprehensive literature review was conducted using key academic databases such as PubMed, Web of Science, and Google Scholar. The methodology prioritized peer-reviewed papers, reviews, and primary research, with a particular emphasis on articles relevant to chemical memory in primitive organisms. This review sheds light on the less-explored territory of chemical memory in primitive organisms. From the complex neural pathways in humans to the basic chemical interactions in bacteria and protozoa, this study underscores the evolutionary significance and ubiquity of information storage in biology. A notable highlight is the exploration of the ability of plants to adaptively respond to their environment despite lacking a central nervous system, emphasizing the role of epigenetic markers in stress memory. In organisms devoid of advanced neural systems, chemical reactions, and interactions pave the way for memory mechanisms, offering insight into the foundational building blocks of memory. The findings presented challenges in traditional neuro-centric views, broadening our understanding of memory and highlighting its pivotal role in the evolutionary tapestry of life.

Study of The Axial and Lateral Bearing Capacity of Bored Piles Affected by Liquefaction

Abstract Liquefaction can lead to structural failure as it reduces the bearing capacity of building foundations. This phenomenon occurs in saturated sandy soils where pore water pressure increases, significantly decreasing effective soil stress. Evaluating the axial and lateral bearing capacity of bored piles affected by liquefaction is crucial to ensure the stability and performance of foundation systems. This study focuses on assessing the capabilities of bored piles in the Governor’s Office of Sulawesi Barat Province, which are influenced by liquefaction phenomena. The empirical approach applied the O’Neill and Reese 1989 method, while the numerical approach used RS Pile. The calculation results revealed decreased axial bearing capacity under liquefaction conditions. In non-liquefaction, PC.4 can withstand up to 24946 kN, with displacements of 0.94 cm (x), 0.39 cm (y), and 1.12 cm in settlement. In liquefaction, it decreases to 2876.78 kN, with displacements of 1.32 cm (x), 0.86 cm (y), and 1.68 cm in settlement. In non-liquefaction, PC.3 can withstand up to 17407.93 kN with displacements of 0.02 cm (x), 0.04 cm (y), and 0.06 cm in settlement. In liquefaction, it decreases to 1713.05 kN, with displacements of 0.02 cm (x), 0.05 cm (y), and 0.07 cm in settlement.

Geophysical Investigation of Bulding Distress in Gashua, Nigeria

Gashua is the Headquarter of Bade local government in Yobe State, it has a population of about 125, 000 according to the 2006 population census. It is a densely populated town located in a flood plain within the Chad Basin. In an attempt to proffer solutions to the prevailing building distress in Gashua and its environs, this study was carried out to accurately characterize the subsurface geology of the area, thereby reducing the incidence of building failure in the area to minimum. In this study, electrical resistivity method was used to determine the causes of building distress and failure in Gashua and its environs. Vertical Electrical Sounding (VES) using Schlumberger array and Electrical Resistivity Tomography (ERT) were adopted for the study. The results of the VES survey showed that the area is composed of five geologic layers which are; the topsoil, clay, sand, sandy-clay, and sand. The ERT results showed that most of the building foundations in the study area were laid within the second layer which is a clay formation. The findings of this study showed that the building distress and failure which are common in the study area were caused by the volumetric changes of the clay formation due to hydrological dynamics. The clay formation absorbs water during the raining season and swells up, and during the dry season it shrinks, this changes in the volume of the clay formation underlying the building foundation in the study area induces a significant mechanical stress on the buildings leading to the formation of cracks, voids, fissures and fracturing of the buildings, which eventually culminate into collapse. In this study, electrical resistivity method of geophysical investigation has demonstrated to be a veritable tool for geotechnical soil evaluation. Based on the findings of this study, geophysical investigation of a proposed site...

THE IMPLEMENTATION OF DIGITAL LITERACY TO ENCOURAGE STUDENTS' DEMOCRATIC ENGAGEMENT IN CIVIC EDUCATION LEARNING

Civic education serves as a crucial foundation for students' character building, particularly in fostering their understanding of democratic principles. With the advancement of technology, digital literacy has become an essential element that significantly enhances student engagement in democracy. This study aimed to investigate the impact of digital literacy implementation in civic education across three schools in Bandung: SMA Negeri 11, SMA Negeri 22, and SMK Negeri 14. The research involved three civic education teachers, three IT staff, and nine students from these schools as participants. The methodology adopted was qualitative, utilizing data collection techniques such as observations, interviews, and documentation. The findings revealed that integrating digital literacy in civic education at SMA Negeri 11, SMA Negeri 22, and SMK Negeri 14 positively influenced students' participation in democratic activities. However, the results indicated that significant improvements were not achieved across all indicators, particularly in creativity, critical thinking, and collaboration. The study suggests that while digital literacy has the potential to enhance civic education, further efforts are required to optimize its benefits comprehensively. Overall, the research highlights the need for innovative approaches to effectively integrate digital literacy in civic education to foster a more engaged and democratically active student body.

Practical experience of installing an artificial base for industrial floors

The installation of artificial foundations for industrial buildings and constructions (industrial floors) is becoming more and more relevant in modern construction, as the number of satisfactory sites for development is decreasing, territories with complex geological and hydrogeological conditions are increasingly being used. A high-quality installation of an artificial base should ensure the durability, strength and stability of the structure. When preparing the site and arranging the artificial base, it is necessary to take into account such important factors as the type of soil, the level of groundwater, the expected load on the floor and the type of floor covering. Compliance with the requirements of regulatory and technical documentation, the use of quality materials and professional execution of work are critical for the successful construction of industrial floors. As part of the study, an overview and detailed description of the process of installing an artificial base for industrial floors was carried out on the example of a real construction, a warehouse complex with an area of 35,000 m² in the south-western outskirts of the city of Kyiv. The article highlights that the foundation installation process includes two main stages: site preparation and creation of artificial foundation layers. The preparation of the site includes cleaning and planning of the territory, removing and removing the fertile layer of soil, conducting engineering and geological studies and implementing measures for the engineering protection of the territory. The arrangement of the artificial base includes the compaction of the existing soil layers, the creation of new artificial base layers and their mechanical compaction in combination with the reinforcement of the layers with geosynthetics materials (geogrids). This study emphasizes the importance of a comprehensive approach to site preparation and artificial base installation, which allows for reliable and long-term operation of industrial floors, minimizing the risks of deformation and damage.

A soil base model of adjacent various story structures

In modern geotechnical engineering, owing to the development of information technology and availability of powerful packages for the calculation of the entire base - foundation - structure system, one of the main research areas is to develop, improve and investigate soil base models to ensure the adequate interaction between the components of the system during the construction and operation of buildings and structures (hereinafter referred to as the “structures”). The paper proposes an improved soil base model in the form of a continuous layer of finite distribution capability to simulate and calculate adjacent multistory structures in the base - foundations - structures system using powerful calculation packages such as SOFiSTiK, ABAQUS, PLAXIS, SCAD, Lira and others. The improved model considers the parameters of the stress-strain properties of the soils of the bases, the geometric profile taking account of the distribution capability of the base and different boundary conditions, but differs from the existing models in that it has a stepped geometric profile at the lower boundary of the model because of different compressible layer depths under each foundation of the structures. The use of this model improves the accuracy of simulating a soil base for large-sized foundations of adjacent structures to obtain reliable results of the stress-strain state of the base - foundations - structures system. An example demonstrates how to simulate and calculate raft foundations of a two-section multistory building in the base - foundations - structures system that interacts with an improved soil base model (linear strains of soils under loads are considered here) with reference to different numbers of stories of the sections. The numerical study results show on a specific calculation example that considering different compressible layers depths in the model under differently loaded foundations results in an increase in moment forces of up to 65% as compared with simulating the whole compressible layer, which may lead to the disruption of large-sized raft foundations.

PH-Driven Rotational Configuration of Keggin-Fe13 Clusters and Their Transformations.

Keggin-Fe13 clusters are considered foundational building blocks or prenucleation precursors of ferrihydrite. Understanding the factors that influence the rotational configuration of these clusters, and their transformations in water, is vital for comprehending the formation mechanism of ferrihydrite. Here, we report syntheses and crystal structures of four lanthanide-iron-oxo clusters, namely, [Dy6Fe13(Gly)12(μ2-OH)6(μ3-OH)18(μ4-O)4(H2O)17]·13ClO4·19H2O (1), [Dy6Fe13(Gly)12(μ3-OH)24(μ4-O)4(H2O)18]·13ClO4·14H2O (2), [Pr8Fe34(Gly)24(μ3-OH)28(μ3-O)30(μ4-O)4(H2O)30]·6ClO4·20H2O (3), and [Pr6Fe13(Gly)12(μ3-OH)24(μ4-O)4(H2O)18]·13ClO4·22H2O (4, Gly = glycine). Single-crystal analyses reveal that 1 has a β-Keggin-Fe13 cluster, marking the first documented instance of such a cluster to date. Conversely, both 2 and 4 contain an α-Keggin-Fe13 cluster, while 3 is characterized by four hexavacant ε-Keggin-Fe13 clusters. Magnetic property investigations of 1 and 2 show that 2 exhibits ferromagnetic interactions, while 1 exhibits antiferromagnetic interactions. An exploration of the synthetic conditions for 1 and 2 indicates that a higher pH promotes the formation of α-Keggin-Fe13 clusters, while a lower pH favors β-Keggin-Fe13 clusters. A detailed analysis of the transition from 3 to 4 emphasizes that lacunary Keggin-Fe13 clusters can morph into Keggin-Fe13 clusters with a decrease in pH, accompanied by a significant change in their rotational configuration.

When I can be my whole authentic self, I feel safe and know that I belong: a photovoice study exploring what culturally safe pregnancy care is to Karen women of refugee background in Victoria, Australia

ABSTRACT Objectives Inequitable pregnancy care experiences and outcomes disproportionately affect refugee background women in Australia. Culturally safe care is essential for achieving health equity, however, cultural safety can only be determined by the person receiving care. To our knowledge, women of refugee background in Australia are yet to be asked what culturally safe pregnancy care is to them. Specifically, this study aimed to explore what culturally safe pregnancy care is to Karen women (from Burma) of refugee background. Design A photovoice study founded on community-based participatory research principles was undertaken with a Karen community of refugee background living in Victoria, Australia. A community advisory group was established, guiding study design and conduct. Five S’gaw Karen-speaking women with experience of pregnancy care in Australia were invited to take photos within their community. Participants shared their photos and stories with each other in four online discussion groups. Results Reflexive thematic analysis guided by a critical constructionist lens developed three themes: Building foundations for belonging; cultivating reciprocal curiosity; and storytelling as an expression of self and shared power. These themes sit within the overarching theme When I can be my whole authentic self, I feel safe and know that I belong. Conclusion When Karen women can embrace their cultural and spiritual identity without fear of discrimination, including racism, culturally safe pregnancy care is possible. This study contributes to the design and delivery of maternity services by providing insights that can enhance equitable and culturally safe pregnancy care for Karen women of refugee background.

Earthquake And Landslide Disaster Risk Assessment At The University Of Defense: A Preliminary Study

The geographical location of the University of Defense in Bogor Regency, Citereup Sub-district, Bogor, West Java, is a sloping terrain that can potentially cause landslides. The InaRISK map released by BNPB, shows that the Defense University is located in an area of Bogor Regency that is prone to disasters, especially landslides. Disaster risk assessment is an approach to show the potential negative impacts that may arise due to a potential disaster. The potential negative impacts are calculated based on the level of vulnerability and capacity of the area. This potential negative impact is seen from the potential number of people exposed, property loss, and environmental damage (PERKA BNPB, 2012). Researchers conducted an analysis of landslide and earthquake disaster vulnerability at the University of Defense. A study of building and population vulnerability to potential earthquakes and landslides was conducted at the University of Defense. The components of social vulnerability at the University of Defense in the event of an earthquake and landslide were obtained. Researchers obtained data on population capacity and building conditions at the University of Defense. Landslide and earthquake disaster risks have the potential to occur at the University of Defense. The University of Defense has the potential threat of landslides because the buildings of the University of Defense are located on hilly slopes. The vulnerability of the University of Defense buildings, the University of Defense buildings have not been designed to be entirely earthquake resistant. This can be seen in some buildings that have visible cracks. It is necessary to retrofit or strengthen the foundations of buildings in the Defense University area that have experienced a decrease in performance such as cracking, shifting, displacement. An important component where the University community and students need self-protection and rescue skills through training.

Role of the Subgrade Reaction Modulus in the Design of Foundations for Adjacent Buildings

This paper examines the effects of soil–structure and structure–soil–structure interactions in the design of foundations for adjacent concrete buildings, which are located on soft soils. The study employs an elasto-plastic model through static (quasi-dynamic) analysis using the direct finite element method by applying earthquake loads in one time step. Two concrete buildings, one with 6 stories and another with 12 stories, were modelled and numerically analysed using ANSYS. The foundations of these two buildings were analysed separately and compared when they were assumed to be adjacent to each other. The designs of the buildings’ foundations were evaluated independently and in comparison with each other to determine the impact of these interactions. The results indicated that accounting for the effects of both interactions increases the total deformation of the foundations. Additionally, the study found that adjusting the subgrade reaction modulus values (Ks) for different sections of the foundation can be a practical method to address both interaction effects simultaneously. This method also optimizes the weight of reinforcement material (Wr) by reducing it by 15% and modifying the positions and quantities of reinforcements used and considering various subgrade reaction modulus values in foundation design.

Dolge njive - Draga: Roman Crucium? The Roman roadside settlement in Dolenjska (southeast Slovenia)

The paper presents the archaeological sites in the environs of the modern settlement of Bela Cerkev and the results of archaeological excavations in 2002, prior to motorway construction. Excavations at four (?) different, but contiguous locations (Dolge njive, Draga 1, Draga 2 in Draga 3) revealed and documented part of the line of the road, the masonry foundations of buildings, numerous post-built structures, a cemetery and domestic material, dating to the Roman period. The paper also considers hypotheses surrounding the location of the Roman-period roadside settlement of Crucium. It is posited that the excavation on these sites have revealed the location of the Roman roadside settlement of Crucium, which was occcupied or functioned in the period from the 1st to the 4th Centuries AD.

Constructing two-stream input matrices in a convolutional neural network for photovoltaic power prediction

To enhance the prediction accuracy of photovoltaic (PV) power and provide a more exact decision basis for power system management, an end-to-end reinforced two-stream convolutional neural network (RTS-CNN) is proposed. A temporal data converter is firstly devised to adaptively transform the input series into two different input matrices for improving the representational ability of the input data. One matrix is obtained through the tensor dimension adjustment, while the other uses Fast Fourier Transform (FFT) to acquire periodic information to reconstruct the shape of raw data. Next, to fully extract features from these two input matrices, the RTS-CNN model selects the powerful ConvNeXt block as the foundational building block of the encoder. Subsequently, the PV power prediction is realized using a decoder augmented with the Convolutional Block Attention Module (CBAM). Finally, for better performance and learning speed, the model is trained using the Second-order Clipped Stochastic Optimization (Sophia). Three sets of comparative experiments are conducted on the dataset obtained from the Desert Knowledge Australia Solar Centre (DKASC), and the model performance is further validated using the Diebold-Mariano (DM) test and external validation. The experimental results show that the proposed RTS-CNN model has outstanding performance in predicting PV power under different temporal resolutions and seasonal conditions. In the spring season, with time intervals of 15 min, 30 min, and 1 h, the RTS-CNN model achieves root mean square errors (RMSE) of 0.5113, 0.5984, and 0.7801, respectively.

Comparison between the measured and the numerically predicted behaviour of an instrumented piled raft

This paper presents the results of numerical predictions for an instrumented piled raft foundation of a tall building in tropical soil. The analysis was performed using 3D finite element analysis and included a comparison of foundation settlements, pile loads, skin friction mobilisation, and raft-soil contact pressure. Initially, the geotechnical model was defined based on field and laboratory test data to conduct a Class A geotechnical prediction. Subsequently, the soil parameters used in the numerical model were re-evaluated to match the measured settlements, aiming for a Class C prediction. The study discusses the main factors that affect the accuracy of the computed settlements, providing valuable insights for foundation designers. Additionally, it highlights the significance of considering the pile-soil-pile and raft-soil-pile interactions in the design of the piles beneath the raft, as these interactions impact the mobilisation of the pile skin friction at different depths.

Prognostication of zones with variable physical and mechanical characteristics of soil massifs

Purpose. The use of geographic information systems, in particular Google Earth Pro and Golden Software Surfer, to predict and visualize changes in the geological structure and create 3D models of built-up areas in the central part of Kyiv. Methodology. The research methodology included several stages and an integrated approach to the analysis of man-made soils in the city of Kyiv. Field studies were carried out with soil sampling in the building area for laboratory analyzes with the degree of concentration of man-made sediments. Modeling and data analysis with the creation of 3D models of man-made soils in the Surfer software package with interpolation of field and laboratory research data into GIS to analyze the distribution of man-made soils. The results of the study were obtained. The results of the study emphasize the importance of an integrated approach to the analysis and management of man-made soils in the urban environment, which contributes to improving the safety and efficiency of construction processes in Kyiv. Based on the collected data, 3D models of man-made soils were created, which made it possible to visualize their distribution and assess the risks associated with construction in dense urban areas. Originality. A methodology for studying the distribution of geotechnogenic soils depending on their concentration has been developed. The dependencies of the distribution of pollution in depth on the building area of the Podilskyi district of Kyiv have been obtained. The use of geographic information systems for forecasting the distribution and volumes of soils with variable physical and mechanical characteristics is proposed. Using Google Earth Pro cellular data and creating a 3D model allows you to analyze the concentration of pollution by man-made soils in an urbanized area. Practical value. The results of the study allow for a better understanding of the geological structure of man-made soils and their impact on the bearing capacity of building foundations. This helps to avoid possible problems with the stability of buildings and increases the safety of building structures. The use of geographic information systems and 3D modeling makes it possible to conveniently and accurately predict the distribution of man-made soils on construction sites, which contributes to the optimization of design solutions and efficient use of resources.

N-doped β-Ga2O3/Si-doped β-Ga2O3 linearly-graded p-n junction by a one-step integrated approach

The p-n junction is the foundation building structure for manufacturing various electronic and optoelectronic devices. Ultrawide bandgap semiconductors are expected to overcome the limited power capability of Si-based electronic device, however, it is very difficult to achieve efficient bipolar doping due to the asymmetric doping effect, thereby impeding the development of p-n homojunction and related bipolar devices, especially for the Ga2O3-based materials and devices. Here, we demonstrate a unique one-step integrated growth of p-type N-doped (2¯01) β-Ga2O3/n-type Si-doped (2¯01) β-Ga2O3 films by phase transition and in-situ pre-doping of dopants, and fabrication of full β-Ga2O3 linearly-graded p-n homojunction diode from them. The full β-Ga2O3 p-n homojunction diode possesses a large built-in potential of 4.52 eV, a high operation electric field > 2.90 MV/cm in the reverse-bias regime, good longtime-stable rectifying behaviors with a rectification ratio of 104, and a high-speed switching and good surge robustness with a weak minority-carrier charge storage. Our work opens the way to the fabrication of Ga2O3-based p-n homojunction, lays the foundation for full β-Ga2O3-based bipolar devices, and paves the way for the novel fabrication of p-n homojunction for wide-bandgap oxides.

Soviet State and Nomadic Peoples of Southern Russia: Social-Political Processes and Natural-Climatic Factors (1920s-1930s)

This study examines Soviet national policy towards nomadic peoples during the 1920s1930s, a period when the foundations of national-state building in the USSR were being laid and developed. The research focuses on a specific region — Southern Russia, one of the most multiethnic macro-regions of the country. The study investigates the implementation of socio-economic and national policies of the Soviet state in the territory of ethnic minorities such as the Kalmyks, Nogais, and Stavropol Turkmen. Common specific characteristics of the nomadic population are noted: religious fanaticism, social isolation, innate closedness. Eradicating these negative qualities among the Kalmyks, Nogais, Stavropol Turkmen, and integrating them into the all-Russian space required authorities to adopt a differentiated approach to working with each ethnic group. It is proven that by implementing the national policy of the Soviet state through solving urgent socio-economic problems of the Kalmyks, Nogais, and Stavropol Turkmen, the authorities were able to achieve at least two main objectives to some extent. The first objective was to lift the mentioned nomadic peoples out of socio-economic crisis, mainly through stimulating and developing agriculture, despite the challenging natural-climatic conditions of the region. The second objective was to ensure the transition of nomads to a settled way of life.

Induced Partial Saturation: From Mechanical Principles to Engineering Design of an Innovative and Eco-Friendly Countermeasure against Earthquake-Induced Soil Liquefaction

Earthquake-induced soil liquefaction is a catastrophic phenomenon that can damage existing building foundations and other structures, resulting in significant economic losses. Traditional mitigation techniques against liquefaction present critical aspects, such as high construction costs, impact on surrounding infrastructure and effects on the surrounding environment. Therefore, research is ongoing in order to develop new approaches and technologies suitable to mitigate liquefaction risk. Among the innovative countermeasures against liquefaction, Induced Partial Saturation (IPS) is considered one of the most promising technologies. It consists of introducing gas/air bubbles into the pore water of sandy soils in order to increase the compressibility of the fluid phase and then enhance liquefaction resistance. IPS is economical, eco-friendly and suitable for urbanised areas, where the need to reduce the risk of liquefaction must be addressed, taking into account the integrity of existing buildings. However, IPS is still far from being a routine technology since more aspects should be better understood. The main aim of this review is to raise some important questions and encourage further research and discussions on this topic. The review first analyses and discusses the effects of air/gas bubbles on the cyclic behaviour of sandy soils, focusing on the soil volume element scale and then extending the considerations to the real scale. The use of useful design charts is also described. Moreover, a section will be devoted to the effect of IPS under shallow foundations. The readers will fully understand the research trend of IPS liquefaction mitigation and will be encouraged to further explore new practical aspects to overcome the application difficulties and contribute to spreading the use of this technology.

A secure and transparent communication mechanism based on blockchain and fuzzy evaluation matrix in metaverse industry 4.0

ABSTRACT Recently, Metaverse is gaining prominence within the field of radiology due to its potential to revolutionize image visualization. Radiologists can harness its capabilities to access dynamic, highly detailed results, thereby enhancing diagnostic precision. Digital twins, at the core of the Metaverse, are digital replicas of real-world objects and entities. They serve as the foundational building blocks, enabling the creation of virtual counterparts for everything within the Metaverse. To ensure the reliability of these digital twins, blockchain technology offers a multi-dimensional data storage solution, reinforcing data integrity and trustworthiness. It is used to ensure a transparent and 3D visualization of each communication and interaction for further looking up any criticality if present in the network. With the rapid increase in value and volume of data, the evolution of the metaverse faces a number of privacy and security concerns. Furthermore, the metaverse in Industry 4.0 is a trending topic that further needs to focus on its security challenges at its initial stage. Fortunately, blockchain is considered as one of the significant solutions. The aim of this paper is to propose a secure and efficient fuzzy evaluation matrix by computing the trust values along with integrating with blockchain mechanism in industry 4.0 enabling metaverse environment. The proposed mechanism is validated against various security concerns such as broken authentication, eavesdropping, personal information leakage, data injection, and unauthorized access. The proposed mechanism showed the validation rate against existing schemes with an improvement of 94% in comparison of several security metrics.