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.

进行了二维模型测试和弹性塑料的有限元分析，以解决用支撑壁的发掘问题，以研究建筑历史，壁摩擦，壁刚度和支柱对地面运动的影响以及壁上的地球压力。测试结果表明，即使最终的壁偏转相同，墙壁上回填和土压力的表面沉降取决于壁的偏转过程。壁摩擦，壁刚度以及支柱的位置和刚度显着影响墙壁上的地球压力和地面运动，包括表面沉降。计算的结果是，土壤和结构的机械行为，土壤与壁之间的界面的行为以及发掘过程被考虑在内，很好地描述了模型测试中获得的结果。在当前的设计实践中，尚未对壁的挠度，壁上的地球压力和（包括挖掘下的地面沉降）在内的地面运动进行影响。

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

T.Adachi et al: "Soil-water coupling analysis of progressive failure of cut slope using a strain softning model"Proc.of IS-Shikoku. 1. 333-338 (1999)

T.Adachi 等人：“使用应变软化模型对路堑边坡渐进破坏进行土水耦合分析”Proc.of IS-Shikoku。