Study on Soil Deformation Parameters Around Deep Pit by Large-Scale Physical Model Test

The study of soil deformation parameters in foundation pit engineering plays an important role in the stability analysis of foundation pit engineering. Based on the theory and method of similarity theory, this paper takes the pit of CCTV main building as the test object and establishes a large-scale physical model test in which the size ratio of the model to the real main building is 1:10. Compared the physical simulation test results with the real measured data, it shows that large-scale physical model tests have higher accuracy in simulating soil deformation process excavated by foundation. The measurement of the maximum horizontal displacement of the model's top is about 0.32% of that of the excavation depth, and in the real condition the percentage is about 1.4%. The trend of passive earth pressure changing with the excavation depth is similar to that of the actual working situations and the actual values of these two conditions are close to each other. The results of the physical simulation are in good agreement with the results obtained from actual conditions and can provide evidence for actual pit construction. © 2019, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.