Rock and Soil Mechanics ›› 2022, Vol. 43 ›› Issue (4): 1061-1072.doi: 10.16285/j.rsm.2021.1062

• Geotechnical Engineering • Previous Articles     Next Articles

Parameter back-analysis of hardening soil model for granite residual soil and its engineering applications

ZHU Min1, 2, CHEN Xiang-sheng1, 2, ZHANG Guo-tao1, 2, PANG Xiao-chao3, SU Dong1, 2, LIU Ji-qiang4   

  1. 1. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China; 2. Key Laboratory of Coastal Urban Resilient Infrastructures of Ministry of Education, Shenzhen University, Shenzhen, Guangdong 518060, China; 3. China Academy of Railway Sciences (Shenzhen) Research and Design Institute Co., Ltd., Shenzhen, Guangdong 518060, China; 4. China Railway Southern Investment Group Co., Ltd., Shenzhen, Guangdong 518060, China
  • Received:2021-07-13 Revised:2021-10-05 Online:2022-04-15 Published:2022-04-18
  • Supported by:
    This work was supported by the Young Scholars of National Natural Science Foundation of China (52008263), the Foundation of China Railway Research Institute (2019YJ181) and the National Natural Science Foundation of China (51938008, 52090084).

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Abstract: In recent years, construction works near the operating metro tunnel in granite residual soil have been gradually increasing, and the impact of these construction works on the safety of shield tunnel should not be ignored. Finite element method is an effective method to evaluate the influence of adjacent construction on shield tunnel, but its reliability highly depends on the reasonable selection of soil constitutive model and parameters. In this paper, the current situation of parameter selection of hardening soil model for granite residual soil is firstly reviewed. Then a back-analysis method for determining the parameters of granite residual soil based on the self-boring pressure meter test (SBPT) is proposed. Finally, the obtained back-analysis parameters are applied to the engineering case of foundation pit excavated overpass existing shield tunnel for method verification, and more reasonable values of parameters of hardening soil model for granite residual soil are determined. The results show that the strength parameters of hardening soil model for granite residual soil can be determined by laboratory tests, and the stiffness parameters of , and are the key parameters for the back-analysis. The ratio of : : from 1:1:3 to 1:1:5 is suitable for engineering practice, and the value of ranges from 36 MPa to 43 MPa according to different ratios.

Key words: granite residual soil, self-boring pressure meter test, hardening soil model, parameter back-analysis, foundation excavation, shield tunnel

CLC Number: 

  • TU 470
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