温度应力对环形地连墙围护结构受力变形的影响分析

胡琦; 凌道盛; 程泽海; 陈峥

温度应力对环形地连墙围护结构受力变形的影响分析 English Version

1. 浙江工业大学建筑工程学院,浙江杭州 310014; 2. 浙江大学软弱土与环境土工教育部重点实验室,浙江杭州 310027; 3. 浙江科技学院建筑工程学院,浙江杭州310023; 4. 华东电力设计院,上海 200063

基金项目: 国家自然科学基金项目（51108417）

详细信息

作者简介:
胡琦(1978- )，男，江西南城人，博士，副教授，硕士生导师，主要从事软黏土力学、基坑工程等方面的研究与教学工作。E-mail: huqi@zju.edu.cn。

中图分类号: TU47
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出版历程
- 收稿日期: 2013-02-04
- 发布日期: 2013-11-19

Effects of temperature stress on diaphragm wall of circular deep foundation pit

1. College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China; 2. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China; 3. School of Civil Engineering and Architecture, Zhejiang University of Science and Technology, Hangzhou 310023, China; 4. East China Electric Power Design Institute, Shanghai 200063, China

摘要

摘要: 温度场对深基坑围护结构受力变形的影响不仅是温度场与应力场的热力耦合问题,同时也是水、土、围护结构共同作用问题。通过对日本东京新丰洲变电所深基坑工程实测结果的反分析,确定了温度场对环形深基坑围护结构受力变形影响的分析方法,获得了温度场变化引起的围护结构受力变形模式,并将研究成果应用于上海世博变深基坑围护结构受力变形分析。分析结果表明：基坑开挖后,围护结构的内侧面暴露在大气中,受大气温度变化的影响,地连墙内外侧存在温度差,且不同位置、不同施工阶段,地连墙的温度场不同；开挖面以上的地连墙没有坑内土体的约束作用,其环向应力的大小主要取决于坑外水、土压力的作用,温度下降时,地连墙向坑内收缩变形；开挖面以下及开挖面附近的墙体,墙体收缩变形受到坑内土体的约束,温度下降时,地连墙的环向应力减小。
- 温度应力 /
- 环形深基坑 /
- 地下连续墙
Abstract: The effects of temperature on retaining structure of deep foundation pits are related with the thermal-mechanical coupling problem of temperature and stress fields and the interaction of water, soils and retaining structures. Through the back analysis of the measured data of Shin-Toyosu substation deep foundation pit in Tokyo, an analysis method for the effects of temperature fields on retaining structures of circular deep foundation pit is determined, and the changing patterns of temperature fields in the retaining structures are acquired. The research results are applied to the analysis of Shanghai 2010 Expo underground substation. The results show that the inner surface of the retaining structures is exposed to the atmosphere, and that temperature difference occurs between the inner and the outside of the wall due to change of atmospheric temperature. The temperature fields vary in different positions and construction stages. There is no constraint effect of soils in the pit, so the hoop stress of diaphragm wall above the excavation face mainly depends on the water-earth pressure outside the pit, and if temperature decreases, the volume of diaphragm wall will shrink. The diaphragm wall under or near the excavation face is restricted by the soils in the pit, so the hoop stress of the diaphragm wall will decrease when the temperature decreases.
- temperature stress /
- circular deep foundation pit /
- diaphragm wall

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参考文献(11)

[1]	郑刚, 顾晓鲁. 考虑支撑-围护桩-土相互作用的基坑支护水平支撑温度应力的简化分析法[J]. 土木工程学报, 2002, 35(3): 87-89. (ZHENG Gang, GU Xiao-lu. Simple method for calculating temperature stress in horizontal strut of foundation pit considering strut-pile-soil interaction[J]. China Civil Engineering Journal, 2002, 35(3): 87-89. (in Chinese))
[2]	杨更社, 张晶. 非均匀温度分布冻土墙围护深基坑开挖的有限元数值模拟[J]. 岩石力学与工程学报, 2003, 22(2): 316-320. (YANG Geng-she, ZHANG jing. finite element numerical simulation of deep foundation pit excavation supported by frozen soil wall with nonhomogeneous temperature distribution[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(2): 316-320. (in Chinese))
[3]	陆培毅, 韩丽君, 于勇. 基坑支护支撑温度应力的有限元分析[J]. 岩土力学, 2008, 29(5): 1290-1294. (LU Pei-yi, HAN Li-jun, YU Yong. Finite element analysis of temperature stress in strut of foundation pit[J]. Rock and Soil Mechanics, 2008, 29(5): 1290-1294. (in Chinese))
[4]	吴明, 孙鸣宇, 夏唐代, 等. 多层支撑深基坑中考虑支撑—围护桩—土相互作用的水平支撑温度应力简化计算方法[J]. 土木工程学报, 2009, 42(1): 91-94. (WU Ming, SUN Ming-yu, XIA Tang-dai, et al. Simplified method of calculating temperature stress in multi-layer struts for deep excavations considering strut-pile-soil interactions[J]. China Civil Engineering Journal, 2009, 42(1): 91-94. (in Chinese))
[5]	艾智勇, 苏辉. 深基坑多层水平支撑温度应力的简化计算方法[J]. 同济大学学报(自然科学版), 2011, 39(2): 199-203. (AI Zhi-yong, SU Hui. A simplified method of calculating thermal stress for multi-layered horizontal struts in deep excavations[J]. Journal of Tongji University (Natural Science), 2011, 39(2): 199-203. (in Chinese))
[6]	陈玉香. 环境温度对某深基坑围护结构内力与变形影响分析[J]. 昆明学院学报, 2010, 32(3): 100-103. (CHEN Yu-xiang. Analysis on the influence of ambient temperature to enclosure structure internal force and deformation in a deep foundation excavation[J]. Journal of Kunming University, 2010, 32(3): 100-103. (in Chinese))
[7]	罗耀武, 凌道盛, 陈云敏, 等. 环形超深基坑围护结构受力变形特性分析[J]. 岩土力学, 2011, 32(2): 617-622. (LUO Yao-wu, LING Dao-sheng, CHEN Yun-min, et al. Mechanical and deformation characteristics of enclosure structure for annular extra-deep excavation[J]. Rock and Soil Mechanics, 2011, 32(2): 617-622. (in Chinese))
[8]	姚武, 郑欣. 配合比参数对混凝土热膨胀系数的影响[J]. 同济大学学报(自然科学版), 2007, 35(1): 77-87. (YAO Wu, ZHENG Xin. Effect of mix proportion on coefficient of thermal expansion of concrete[J]. Journal of Tongji University(Natural Science), 2007, 35(1): 77-87. (in Chinese))
[9]	朱伯芳. 大体积混凝土温度应力与温度控制[M]. 北京: 中国电力出版社, 1999. (ZHU Bo-fang. Thermal stresses and temperature control of mass concrete[M]. Beijing: China Electric Power Press, 1999. (in Chinese))
[10]	唐世斌, 唐春安, 梁正召, 等. 混凝土热传导与热应力的细观特性及热开裂过程研究[J]. 土木工程学报, 2012, 45(2): 11-19. (TANG Shi-bin, TANG Chun-an, LIANG Zheng-zhao, et al. Study of thermal conduction and thermal stress of concrete at mesoscopic level and its thermal cracking processes[J]. China Civil Engineering Journal, 2012, 45(2): 11-19. (in Chinese))
[11]	KUMAGAI T, ARIIZUMI K, KASHIWAGI A. Behaviour and analysis of large-scale cylindrical earth retaining structure[J]. Soils and Foundations, Japanese Geotechnical Society, 1999, 39(3): 13-26.