3D FEM Analysis on Deformation Performance of Retaining Structures in Unbraced Excavation

doi:10.16183/j.cnki.jsjtu.2009.06.027

Abstract

Abstract:

Three-dimensional finite element method was used to analyze an unbraced dock excavation. Cellular diaphragm wall and high-piled slab & beam diaphragm wall were used as the retaining structures of the excavation. The soil was assumed as cross-isotropy elastic material. The calculated results of retaining wall deflections agree well with the field measurements. The calculated results show that the deformation behavior of the retaining wall is influenced by its structure form and construction sequence of the excavation. The piles in the excavation can control the deformation of the retaining wall effectively. The effect of the dock excavation on the adjacent excavation was also discussed.

Key words: cellular diaphragm wall, high-piled slab & beam diaphragm wall, unbraced excavation, threedimensional finite element method, deformation performance

CLC Number:

TU476

HOU Yong-mao, WANG Jian-hua, GU Qian-yan. 3D FEM Analysis on Deformation Performance of Retaining Structures in Unbraced Excavation[J]. Journal of Shanghai Jiao Tong University, 2009, 43(06): 972-975.

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References 5

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施工段	施工时间/d	施工描述
1	39	坞口基坑开挖，底板浇筑完成
2	23	坞室基坑第1段施工完成
3	10	坞室基坑第2段施工完成
4	12	坞室基坑第3段施工完成
5	10	坞室基坑第4段施工完成
6	20	坞室基坑第5段施工完成
7	19	坞室基坑第6段施工完成
8	19	坞室基坑第7段施工完成

土层编号	K₀	E_h/MPa	E_v/MPa	G_vh/MPa	μ_vh	μ_hh
②₃	0.50	16.1	26.8	7.0	0.33	0.35
②_3t	0.50	13.4	22.4	5.8	0.29	0.30
②₃	0.55	16.1	26.8	7.0	0.33	0.35
④	0.64	5.0	8.4	2.2	0.37	0.42
⑤_1-1	0.52	120.0	204.0	53.0	0.29	0.30