BEHAVIOR OF GROUND IN EXCAVATION PROBLEMS: MODEL TESTS AND NUMERICAL SIMULATIONS

机译：挖掘问题中的地面行为：模型测试和数值模拟

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In order to investigate the fundamental mechanisms of the generation of earth pressure and the ground movement in excavation problems such as tunneling and braced open excavation, 2D model tests and the corresponding elastoplastic finite element analyses were carried out. It is experimentally shown that the earth pressure and the ground movement are very much influenced by excavation patterns and existing building loads. In tunneling problems, the influence of deflection pattern of circular tunnel and the influence of existing building load on the earth pressure and the ground movements are discussed. In the open excavation problems, the influence of deflection process of wall and the influence of existing load are discussed. The numerical simulations using an elastoplastic constitutive model named subloading tij model, which can describe typical stress- strain behaviors in general stress conditions, describe well the observed earth pressure and ground movements in both excavation problems.

机译：为了研究开挖和支撑开挖等开挖问题中土压力的产生和地层运动的基本机理，进行了二维模型试验和相应的弹塑性有限元分析。实验表明，土方压力和地面运动受开挖方式和现有建筑荷载的影响很大。在隧道问题中，讨论了圆形隧道的挠度模式以及现有建筑物荷载对土压力和地震动的影响。在开挖问题中，讨论了墙体变形过程的影响和现有荷载的影响。使用名为次加载tij模型的弹塑性本构模型进行的数值模拟可以描述一般应力条件下的典型应力-应变行为，很好地描述了在两个开挖问题中观测到的土压力和地面运动。

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来源
《Sino-Japan Geotechnical Symposium November; 20071104-07; Chongqing(CN)》|2007年|P.3-20|共18页
会议地点 Chongqing(CN)
作者
T. NAKAI; F. ZHANG; H. M. SHAHI; M. KIKUMOTO;
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作者单位

Department of Civil Engineering, Nagoya Institute of Technology, Showa-Ku, Gokiso-cho, Nagoya, 466-8555, Japan;

Department of Civil Engineering, Nagoya Institute of Technology, Showa-Ku, Gokiso-cho, Nagoya, 466-8555, Japan;

Department of Civil Engineering,;

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原文格式 PDF
正文语种 eng
中图分类土力学、地基基础工程;
关键词
Model Test; Numerical Simulation; Braced Open Excavation; Tunnel Excavation; Existing Load; Circular Tunnel;

机译：模型试验;数值模拟;露天开挖;隧道开挖;现有荷载;圆形隧道;

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BEHAVIOR OF GROUND IN EXCAVATION PROBLEMS: MODEL TESTS AND NUMERICAL SIMULATIONS

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