MODEL TESTS AND NUMERICAL SIMULATION OF BRACED EXCAVATION IN SANDY GROUND : INFLUENCES OF CONSTRUCTION HISTORY, WALL FRICTION, WALL STIFFNESS, STRUT POSITION AND STRUT STIFFNESS
MODEL TESTS AND NUMERICAL SIMULATION OF BRACED EXCAVATION IN SANDY GROUND : INFLUENCES OF CONSTRUCTION HISTORY, WALL FRICTION, WALL STIFFNESS, STRUT POSITION AND STRUT STIFFNESS
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沙地支撑开挖模型试验与数值模拟：施工历史、墙体摩擦力、墙体刚度、支柱位置和支柱刚度的影响
DOI：
10.3208/sandf.39.3_1
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发表时间：
1999
影响因子：
3.7
通讯作者：
T. Hashimoto
中科院分区：
文献类型：
--
作者：
T. Nakai;H. Kawano;Kouki Murata;Masaaki Banno;T. Hashimoto
通过二维模型试验和弹塑性有限元分析，研究了施工历史、墙体摩擦力、墙体刚度和支撑对土体位移和墙体土压力的影响。试验结果表明，即使最终墙体挠度相同，填土表面的沉降量和墙体上的土压力也取决于墙体的变形过程。墙体摩擦力、墙体刚度以及支撑的位置和刚度对墙体上的土压力和地表变形(包括地表沉降量)有重要影响。计算结果较好地考虑了土体与结构的力学行为、土体与墙体的接触面性质以及开挖过程，较好地反映了模型试验的结果。在目前的设计实践中，对墙体的挠度、墙体上的土压力和地表移动的影响还没有得到正确的评价。
ABSTRACT Two-dimensional model tests and elastoplastic finite element analyses for excavation problems with a braced wall are performed to investigate the influence of construction history, wall friction, wall stiffness and the struts on the ground movements and the earth pressures on the wall. Test results show that the surface settlements of the backfill and earth pressure on the wall depend on the deflection process of the wall, even if the final wall deflections are the same. The wall friction, wall stiffness and the position and stiffness of strut significantly affect the earth pressure on the wall and the ground movement including the surface settlements. The computed results, in which mechanical behavior of soil and structure, behavior of interface between soil and wall and the process of excavation were properly taken into consideration, describe well the results obtained in the model tests. Such influence on the deflection of the wall, the earth pressure on the wall and the ground movements has not been evaluated properly in the present design practice.