Study on effect of suction on earth pressure on retaining and protecting structure for foundation pit |
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| Authors: | QI Guo-qing CAI Zheng-yin GAO Hua-dong TAO Lian-jin |
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| Institution: | 1. Sichuan University, Chengdu 610065, China; 2. Guangzhou Sihang Institute of Engineering Technology, Guangzhou 510230, China;
3. Deparment of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
4. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | In the design of the retaining and protecting structures of foundation excavation, the theory of Rankine’s earth pressure is used to calculate the earth pressure on the structure in the present code. The method of these design and calculation is built according to saturated soil mechanics. The results of these methods are not very satisfied. The equations of active earth pressure and passive earth pressure are deduced based on the theory of unsaturated soil mechanics. Finally, taking the actual project for example, the effect of suction and construction time on the earth pressure on the retaining and protecting structures of foundation excavation is studied according to the equations. |
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| Keywords: | unsaturated soils suction retaining and protecting structure of foundation excavation active (passive) earth pressure |
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