Rock and Soil Mechanics ›› 2019, Vol. 40 ›› Issue (10): 4021-4029.doi: 10.16285/j.rsm.2018.1376

• Geotechnical Engineering • Previous Articles     Next Articles

Study of parameters selection and applicability of HSS model in typical stratum of Jinan

LI Lian-xiang1, 2, LIU Jia-dian1, 2, LI Ke-jin 3, HUANG Heng-li1, 2, JI Xiang-kai1, 2   

  1. 1. Foundation Pit and Deep Foundation Engineering Research Center, Shandong University, Jinan, Shandong 250061, China; 2. School of Civil Engineering, Shandong University, Jinan, Shandong 250061, China; 3. China Railway 14th Bureau Group of the Tunnel Engineering Co., Ltd., Jinan, Shandong 250013, China
  • Received:2018-07-29 Online:2019-10-11 Published:2019-10-20
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51508310), the Natural Science Foundation of Shandong Province (ZR2018QEE008), the Jinan Science and Technology Project (201201145) and the Research and Application Project of Construction Effect Control of Adjacent and Parallel Metro Station Group Structure of China Railway 14th Bureau.

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Abstract: Aiming at the foundation pit engineering in the typical stratum of Jinan, the hardening soil small-strain (HSS) model in PLAXIS 3D is adopted to establish the finite element model, and according to the actual monitoring data and the displacement back analysis, a general method of selecting the parameters for the HSS model in this typical stratum is obtained. Then the HSS model and the Mohr-Coulomb (M-C) model are analyzed by the simplified finite element analysis. The simulation results of the deformation of the retaining wall and the ground surface settlement behind the wall under different excavation depths are compared. The results show that the difference between the simulation results of M-C model and HSS model increases with the increase of excavation depth, and the results of HSS model are more in line with the actual deformation. Considering the difficulty and economy of parameters selection and the engineering applicability of the two models, it is suggested that when the excavation exceeds 15 m, the HSS model should be taken, otherwise, the M-C model should be taken. The research results have important reference value to guide the design of deep foundation pit and the investigation and selection of geotechnical engineering parameters.

Key words: HSS model, displacement back analysis, applicability, deep foundation pit

CLC Number: 

  • TU 475
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