Stress-deformation behavior of ground under excavation and development of new design methods

开挖地基应力变形行为及新设计方法的开发

• 批准号: 10555165
• 负责人: NAKAI Teruo
• 金额: $ 3.07万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555165/
• 关键词: Retaining wall; Excavation; Constitutive model for soils; Finite element method; Model tests; Earth pressure; Deformation of Ground; モデル実験; 変形

Two-dimensional model tests and elastoplastic finite element analysis for excavation problems with braced wall are performed to investigate the influence of construction history , the wall friction, the wall stiffness and the struts on the ground movements and the earth pressure 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 deflection are the same. The wall friction, the wall stiffness and the position and stiffness of strut affect significantly 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 property 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 including surface settlements under excavation has not been evaluated property in the present design practice.

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)有显著影响。计算结果考虑了土体与结构的力学特性、土体与墙体的界面特性以及开挖过程，较好地反映了模型试验的结果。在目前的设计实践中，这种对墙体变形、墙体上的土压力和开挖引起的包括地表沉降在内的地表移动的影响还没有被评估。

项目成果

T.Nakai et al: "Simulation of braced excavation considering wall friction and stiffness"Proc.of XI ARCSMGE. 1. 329-332 (1999)

T.Nakai 等人：“考虑壁摩擦和刚度的支撑开挖模拟”Proc.of XI ARCSMGE。

中井 他: "Simulation of braced excavation considering wall friction and wall stiffness"Proc. 11th ARCSMGE. 1. 329-332 (1999)

Nakai 等人：“考虑墙体摩擦力和墙体刚度的支撑开挖模拟”Proc. 11th ARCSMGE。

T.Nakai et al: "Model tests and numerical simulation of braced excavation in sandy ground"Soils and foundations. 39. 1-12 (1999)

T.Nakai 等：“沙地支撑开挖的模型试验和数值模拟”土壤和地基。

T.Hishikawa,T.Nakai & Y.Nishi: "Coupled excavation analyses of vertical cut and slopes in clay"Proc.of IS-Shikoku. 1. 225-231 (1999)

菱川T·中井

Nakai, T., Murata, K., Banno, M. and Hashimoto, T.: "Simulation of braced excavation considering wall friction and wall stiffness"Proc. of 11th Asian Conf. on Soil Mechanics and Geotechnical Engineering. Vol. 1. 329-332

Nakai, T.、Murata, K.、Banno, M. 和 Hashimoto, T.：“考虑墙体摩擦力和墙体刚度的支撑开挖模拟”Proc。