|Table of Contents|

Influence of Different Strength Parameters on Deformation and Internal Force of Retaining Structures in Shanghai(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2021年06期
Page:
55-63
Research Field:
软土基坑设计与变形控制
Publishing date:

Info

Title:
Influence of Different Strength Parameters on Deformation and Internal Force of Retaining Structures in Shanghai
Author(s):
HE Ping1;  WANG Wei-dong2; 3;  XU Zhong-hua2; 3;  WANG Qiang1
(1. CISDI Shanghai Engineering Co., Ltd., Shanghai 200940, China; 2. Arcplus Underground Space & Engineering Design Research Institute, Shanghai 200011, China; 3. Shanghai Engineering Research Center of Safety Control for Facilities Adjacent to Deep Excavations, Shanghai 200011, China)
Keywords:
total stress strength parameter;  effective stress strength parameter;  plane vertical elastic foundation beam method;  retaining structure;  deformation;  internal force
PACS:
TU447
DOI:
10.19815/j.jace.2021.08059
Abstract:
In order to study the influence of different strength parameters on the deformation and internal force of retaining structures in Shanghai, the model of plane vertical elastic foundation beam method was established in ABAQUS. Based on four kinds of typical excavation generalized models and soil strength parameters collected from 195 engineering investigation reports and literature test data in Shanghai, the influence of four sets of different strength parameters on the maximum soil and water pressure, deformation(maximum displacement), internal force(maximum shear force, maximum bending moment)and strut axial force of retaining structure in each kind of generalized model were studied. The results show that the deformation and internal force of the retaining structure obtained by using triaxial consolidation undrained(CU)effective stress strength parameters are the smallest, while the results calculated by vane undrained shear strength have no obvious rule compared with the results of effective stress strength parameters. The calculated results of direct shear consolidation quick shear and CU total stress strength parameters are relatively close. Compared with the results of effective stress strength parameters, the maximum displacement increment is about 6%, the maximum soil and water pressure increment is 4%-5%, and the maximum bending moment and shear increment is 7%-8%. Generally, in the current Shanghai excavation code, it is safer to adopt the total stress strength parameters of direct shear consolidation quick shear test for the design of retaining structure than to adopt the effective stress strength parameters.

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Last Update: 2021-11-01