Abstract
A new type of retaining wall, the sheet pile wall with a relieving platform, is introduced in this paper. Based on the prototype retaining wall with a height of 12 meters, the model tests with a geometric similarity ratio of 7 are designed and we focus on the model production and analysis on the test results. Some comparative analyses between the measured values and the calculation values by using the theoretical calculation method and finite difference method are carried out, including Earth pressure behind the wall, prepile resistance force, the bending moment, and the deformation of rib pillars in the retaining wall. The results show that Earth pressure behind the wall has a linear increase with the depth and lies between Rankine Earth pressure and Earth pressure at rest. Moreover, the prepile resistance force can be approximated by the m method, and the bending moment can be also used for approximate calculation by the m method and is larger than the results calculated by the finite difference method. It is also observed that there is a zero‐displacement point on the pile bottom, and the Earth pressure above the point behind the pile develops from Earth pressure at rest to the active Earth pressure; the Earth pressure under the point behind the pile develops from Earth pressure at rest to the passive Earth pressure. Therefore, the Earth pressure behind the bottom wall is larger than the calculated value by the Rankine theory. Finally, the displacement of the rib pillars is greater than the calculated results using the finite difference method and exceeds the standard requirements, owing to the failure of the retaining wall, and the unloading board needs to be constructed to improve the retaining wall’s behaviour. These findings verify the model’s credibility and provide an underpinning for studying the behavior of the retaining wall.
Highlights
The standard methods that have been used to investigate and analyze the interaction between retaining structure and soil include model tests, centrifugal tests, field tests, analytical methods, and numerical analysis
Distribution of Earth Pressure. e Earth pressure behind the retaining wall and prepile resistance force without the unloading board25 are shown in Figures 17 and 18
Based on the studies presented in this study, the credibility and validity of the self-made model of the retaining wall, the test instrument, and the test data are verified, and the following five contributions to the field can be extracted: (1) e measured Earth pressure behind the sheet pile wall with relieving platform without the unloading board has a strong linear correlation with its depth. is value lies between the values of Rankine Earth pressure and Earth pressure at rest and the soil behind the wall remains in a progressive active failure state
Summary
The standard methods that have been used to investigate and analyze the interaction between retaining structure and soil include model tests, centrifugal tests, field tests, analytical methods, and numerical analysis. (1) It has the advantages of the sheet pile retaining wall, including a small space for arrangement, good safety and reliability, and good durability (2) e Earth pressure behind the wall under the unloading board is reduced through the unloading effect of the unloading board (3) e unloading board provides a reverse bending moment to the rib pillars and piles; the internal force distribution of the retaining wall tends to be reasonable and the mechanical deformation characteristics of the retaining wall are optimized (4) Due to the unloading effect of the unloading board and its inverse bending moment to the wall, the retaining wall is applicable to higher slope than the cantilever sheet pile retaining wall (5) Compared with the reinforced soil retaining wall (RSW), the excavation space behind the wall is reduced, which has good adaptability to the site and high safety for long-term use Currently, both Chinese and international scholars and engineers have used simplified theoretical calculation methods and numerical analysis to determine some parameters and analyze the mechanical, deformation properties of the retaining structure. A credibility test method was provided for studying the mechanical and deformation characteristics of the sheet pile wall with a relieving platform
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