上海地区板式支护体系基坑变形预测简化计算方法

王卫东; 王浩然; 徐中华

上海地区板式支护体系基坑变形预测简化计算方法 English Version

(1. 同济大学地下建筑与工程系，上海 200092；2. 华东建筑设计研究院有限公司地基基础与地下工程设计研究所，上海 200002；3. 同济大学岩土及地下工程教育部重点实验室，上海 200092）

基金项目: 上海市青年科技启明星计划B资助项目（11QB1400400）

详细信息

作者简介:
王卫东(1969– )，男，辽宁人，博士，同济大学兼职教授，博导，华东建筑设计研究院教授级高级工程师，从事地下工程、深基坑工程、高层建筑地基基础的设计与理论分析。

中图分类号: TU47
计量
- 文章访问数: 1154
- HTML全文浏览量: 4
- PDF下载量: 467
出版历程
- 收稿日期: 2011-10-19
- 发布日期: 2012-11-13

Simplified method of deformation prediction for excavations retained by embedded walls in Shanghai soft soil

(1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Department of Underground Structure & Geotechnical Engineering, East China Architectural Design & Research Institute, Shanghai 200002, China; 3. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China)

摘要

摘要: 基坑变形预测是分析基坑开挖对环境影响的核心内容之一。收集了上海地区65个常见的板式支护体系基坑工程案例，并对其进行了分类。对不同类型的板式支护体系基坑建立不同的基于土体HS-Small模型的平面应变有限元模型进行分析。根据室内土工试验结果与基于实测数据的参数反演分析，确定了上海软土地区典型土层土体的HS-Small模型计算参数。通过对108个有限元计算结果的分析及归一化，推导了能够综合考虑基坑系统刚度、基坑深度和基坑宽度的上海地区板式支护体系基坑围护结构最大侧移和地表最大沉降的简化计算公式，并且提出了基坑围护结构侧移曲线和地表沉降曲线，同时也给出了上海地区板式支护体系基坑变形的预测流程。采用本文给出的简化方法预测了上海地区的7个工程的变形并与实测结果进行了比较，结果表明该方法能较好地预测上海地区的板式支护体系基坑的变形。
- 板式支护体系基坑 /
- 变形预测 /
- 简化方法 /
- HS-Small模型 /
- 有限元
Abstract: Deformation prediction of excavations is one of the core contents in analyzing their effect on environment. 65 case histories of excavations retained by embedded walls in Shanghai are collected and divided into different groups. Plane strain finite element models are set up to simulate the construction procedures of excavations retained by embedded walls of different groups. The parameters of HS-Small model for Shanghai typical soil layers are got from laboratory tests and back analysis. The simplified calculation formulas considering system stiffness, excavation depth, excavation width for the maximum lateral deformation of embedded walls and the maximum ground surface settlement are deduced by normalizing 108 FEM results. The lateral deformation profile of embedded walls and the ground surface settlement profile behind the embedded walls are provided. The procedure of adopting the simplified analysis method is also illustrated. Comparison of the monitored deformations of 7 case histories and predicted deformations using the simplified analysis method reveals that the proposed simplified method is suitable for analyzing deformation of deep excavations in Shanghai.
- embedded wall /
- deformation prediction /
- simplified method /
- HS-Small model /
- FEM

HTML全文

参考文献(23)

[1]	DG/TJ08—61—2010基坑工程技术规范[S]. 2010. (DG/TJ08—61—2010 Technical code for excavation engineering[S]. 2010. (in Chinese))
[2]	HASHASH Y M, WHITTLE A J. Ground movement prediction for deep excavations in soft clay[J]. Journal of Geotechnical Engineering, ASCE, 1996, 122(6): 474–486.
[3]	徐中华, 王建华, 王卫东. 主体地下结构与支护结构相结合的复杂深基坑分析[J]. 岩土工程学报, 2006, 28(增刊): 1355–1359. (XU Zhong-hua, WANG Jian-hua, WANG Wei-dong. Analysis of a complicated deep excavations supported by substructures[J]. Chinese Journal of Geotechnical Engineering, 2006, 28(S0): 1355–1359. (in Chinese))
[4]	应宏伟, 郭跃. 某梁板支撑体系的深大基坑三维全过程分析[J]. 岩土工程学报, 2007, 29(11): 1670–1675. (YING Hong-wei, GUO Yue. 3D analysis on a deep beam-slab braced foundation pit considering effect of construction process[J]. Chinese Journal of Geotechnical Engineering, 2007, 29(11): 1670–1675. (in Chinese))
[5]	杨光华. 深基坑支护结构的实用计算方法及其应用[J]. 岩土力学, 2004, 25(12): 1885–1896. (YANG Guang-hua. Practical calculation method of retaining structures for deep excavations and its application[J]. Rock and Soil Mechanics, 2004, 25(12): 1885–1896. (in Chinese))
[6]	LONG M. Database for retaining wall and ground movements due to deep excavations[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2001, 127(33): 203–224.
[7]	MOORMANN C. Analysis of wall and ground movements due to deep excavations in soft soil based on a new worldwide database[J]. Soils and Foundations, 2004, 44(1): 87–98.
[8]	CLOUGH G W, O’ROURKE T D. Construction induced movements of in situ walls[C]// Proceedings, ASCE Conference on Design and Performance of Earth Retaining Structures, Geotechnical Special Publication No. 25, ASCE. New York, 1990: 439–470.
[9]	WONG K S, BROMS B B. Lateral wall deflections of braced excavation in caly[J]. Journal of Geotechnical Engineering, ASCE, 1989, 115(6): 853–870.
[10]	KUNG T C, JUANG H, HSIAO C L, et al. Simplified model for wall deflection and ground-surface settlement caused by braced excavation in clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2007, 133(6): 731–747.
[11]	MEDINA D G Z. Semi-empirical method for designing excavation support systems based on deformation control[D]. Kentucky: University of Kentucky, 2007.
[12]	DGJ08—37—2002岩土工程勘察规范[S]. 2002. (DGJ08—37—2002 Code for investigation of geotechnical engineering[S]. 2002. (in Chinese))
[13]	ROBOSKI J F. Three-dimensional performance and analyses of deep excavations[D]. Illinois: Northwestern University, 2004.
[14]	BENZ T. Small-strain stiffness of soils and its numerical consequences[D]. Stuttgart: Institute of Geotechnical Engineering, University of Stuttgart, 2007.
[15]	徐中华, 王卫东. 敏感环境下基坑数值分析中土体本构模型的选择[J]. 岩土力学, 2010, 31(1): 258–264. (XU Zhong-hua, WANG Wei-dong. Selection of soil constitutive models for numerical analysis of deep excavations in close proximity to sensitive properties[J]. Rock and Soil Mechanics, 2010, 31(1): 258–264. (in Chinese))
[16]	BENZ T, SCHWAB R, VERMEER P. Small-strain stiffness in geotechnical analyses[J]. Geotechnical Engineering, 2009, 86(S1): 16–27.
[17]	王卫东, 王浩然, 徐中华. 基坑开挖数值分析中土体HS模型参数的试验研究与分析[J]. 岩土力学, 2012, 33(8): 2283–2290. (WANG Wei-dong, WANG Hao-ran, XU Zhong-hua. Laboratory test and analysis of the parameters of the Hardening Soil model used for numerical analysis of deep excavations[J]. Rock and Soil Mechanics, 2012, 33(8): 2283–2290. (in Chinese))
[18]	SCHWEIGER H F, VERMEER P A, WEHNERT M. On the design of deep excavations based on finite element analysis[J]. Geomechanics and Tunnelling, 2009, 2: 333–344.
[19]	HSIEH P G, OU C Y. Shape of ground surface settlement profiles caused by excavation[J]. Canadian Geotechnical Journal, 1998, 35(6): 1004–1017.
[20]	王卫东, 徐中华, 常林越. 深大基坑变形控制设计与施工技术及环境影响评估方法研究背景工程与应用研究分报告[R]. 上海, 2010. (WANG Wei-dong, XU Zhong-hua, CHANG Lin-yue. Case histories of performance-based design and construction of deep excavations and analyzing the deformation of excavations in close proximity to sensitive properties[R]. Shanghai, 2010. (in Chinese))
[21]	王浩然, 王卫东, 徐中华. 基坑开挖对邻近建筑物影响的三维有限元分析[J]. 地下空间与工程学报, 2009, 5(增刊2): 1512–1517. (WANG Hao-ran, WANG Wei-dong, XU Zhong-hua. Three dimensional analysis of the influence of deep excavation on adjacent building[J]. Chinese Journal of Underground Space and Engineering, 2009, 5(S2): 1512–1517. (in Chinese))
[22]	王卫东, 徐中华. 预估深基坑开挖对周边建筑物影响的简化分析方法[J]. 岩土工程学报, 2010, 32(增刊1): 32–38. (WANG Wei-dong, XU Zhong-hua. Simplified analysis method for evaluating excavation-induced damage of adjacent buildings[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(S1): 32–38. (in Chinese))
[23]	徐中华. 上海地区支护结构与主体地下结构相结合的深基坑变形性状研究[D]. 上海: 上海交通大学, 2007. (XU Zhong-hua. Deformation behavior of deep excavations supported by permanent structure in Shanghai soft deposit[D]. Shanghai: Shanghai Jiaotong University, 2007. (in Chinese))

施引文献

资源附件(0)

计量

文章访问数: 1154
HTML全文浏览量: 4
PDF下载量: 467
被引次数: 0

上海地区板式支护体系基坑变形预测简化计算方法 English Version

作者简介: 王卫东(1969– )，男，辽宁人，博士，同济大学兼职教授，博导，华东建筑设计研究院教授级高级工程师，从事地下工程、深基坑工程、高层建筑地基基础的设计与理论分析。

计量

出版历程

Simplified method of deformation prediction for excavations retained by embedded walls in Shanghai soft soil

计量

出版历程

目录

作者简介:
王卫东(1969– )，男，辽宁人，博士，同济大学兼职教授，博导，华东建筑设计研究院教授级高级工程师，从事地下工程、深基坑工程、高层建筑地基基础的设计与理论分析。