考虑初始不均匀沉降的建筑物受基坑开挖影响的有限元分析

›› 2012, Vol. 33 ›› Issue (8): 2491-2499.

考虑初始不均匀沉降的建筑物受基坑开挖影响的有限元分析

郑刚^{1, 2}，李志伟^{1, 2}

1. 天津大学滨海土木工程结构与安全教育部重点实验室，天津 300072；2. 天津大学土木工程系，天津 300072

收稿日期:2011-04-19 出版日期:2012-08-10 发布日期:2012-08-13
作者简介:郑刚，男，1967年生，博士，教授，博士生导师，从事土力学与岩土工程方面的教学与科研工作
基金资助:
国家重点基础研究发展计划（973计划）资助项目(No. 2010CB732106)

Finite element analysis of responses of building adjacent to excavation considering initial differential settlement

ZHENG Gang^{1, 2}，LI Zhi-wei^{1, 2}

1. Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China; 2. Department of Civil Engineering, Tianjin University, Tianjin 300072, China

Received:2011-04-19 Online:2012-08-10 Published:2012-08-13

摘要/Abstract

摘要： 在考虑土体的小应变现象及建筑物初始变形的基础上，研究了邻近建筑物与基坑相对距离的变化及自身刚度变化对建筑物不均匀沉降的影响。对于纵墙垂直于基坑边，且跨越坑外沉降槽最低点时，墙体产生的下凹挠曲变形与建筑物的初始变形趋势相同，初始变形将在一定程度上增大墙体的拉应变，尤其是对于刚度较小的建筑物，初始变形对墙体拉应变的影响将更为显著，此时考虑建筑物的初始变形是很有必要的；而当纵墙垂直于基坑边，且处于坑外土体上凸区域时，初始挠曲与基坑开挖产生的挠曲变形趋势相反，此时不考虑建筑物的初始变形则是偏于保守的。当建筑物部分处于下凹区、部分处于上凸区时，对于建筑物的下凹区部分也应考虑其初始变形的影响。

关键词: 基坑, 建筑物, 有限元分析, 初始不均匀沉降

Abstract: Considering the initial differential settlement of buildings as well as small strain characteristic of soil, the impact of the distance between the building and the excavation and the stiffness of the building on the differential settlement are analyzed. It is necessary to consider the initial differential settlement of the building. When the longitudinal walls of the building are perpendicular to the retaining wall and are located over the lowest point of the settlement trough, sagging deformation occurs and its trend is the same as the initial settlement. So the initial deflection increases the tensile strain. In this case, taking account of initial deflection is necessary. Especially for the building with low stiffness, the influence of the initial settlement on the tensile strain of the building is more obvious. When the longitudinal wall of building is perpendicular to the retaining wall and located over the hogging zone of the settlement trough, taking no account of initial deflection is conservative since the deflection trend is opposite to the initial settlement. When the longitudinal walls are located over the sagging and hogging zone, the initial deflection should be considered in the sagging zone.

Key words: excavation, building, FEM, initial differential settlement

中图分类号:

TU 47

郑刚，李志伟 . 考虑初始不均匀沉降的建筑物受基坑开挖影响的有限元分析[J]. , 2012, 33(8): 2491-2499.

ZHENG Gang ，LI Zhi-wei . Finite element analysis of responses of building adjacent to excavation considering initial differential settlement[J]. , 2012, 33(8): 2491-2499.

参考文献

相关文章 15

[1]	王国辉, 陈文化, 聂庆科, 陈军红, 范晖红, 张川, . 深厚淤泥质土中基坑开挖对基桩影响的离心模型试验研究[J]. 岩土力学, 2020, 41(2): 399-407.
[2]	魏纲, 张鑫海, 林心蓓, 华鑫欣, . 基坑开挖引起的旁侧盾构隧道横向受力变化研究[J]. 岩土力学, 2020, 41(2): 635-644.
[3]	郭院成, 李明宇, 张艳伟, . 预应力锚杆复合土钉墙支护体系增量解析方法[J]. 岩土力学, 2019, 40(S1): 253-258.
[4]	丁智, 张霄, 金杰克, 王立忠, . 基坑全过程开挖及邻近地铁隧道变形实测分析[J]. 岩土力学, 2019, 40(S1): 415-423.
[5]	叶观宝, 郑文强, 张振, . 大面积填土场地中摩擦型桩负摩阻力分布特性研究[J]. 岩土力学, 2019, 40(S1): 440-448.
[6]	申翃, 李晓, 雷美清, 徐文博, 余秀玲, . 剪力键支护体系的构想及模型试验研究[J]. 岩土力学, 2019, 40(7): 2574-2580.
[7]	余瑜, 刘新荣, 刘永权, . 基坑锚索预应力损失规律现场试验研究[J]. 岩土力学, 2019, 40(5): 1932-1939.
[8]	谷淡平, 凌同华, . 悬臂式型钢水泥土搅拌墙的水泥土承载比和墙顶位移分析[J]. 岩土力学, 2019, 40(5): 1957-1965.
[9]	刘念武, 陈奕天, 龚晓南, 俞济涛, . 软土深开挖致地铁车站基坑及邻近建筑变形特性研究[J]. 岩土力学, 2019, 40(4): 1515-1525.
[10]	钟国强, 王浩, 孔利, 王成汤, . 基于T-S模糊故障树的地连墙+支撑支护基坑坍塌可能性评价[J]. 岩土力学, 2019, 40(4): 1569-1576.
[11]	李连祥, 刘嘉典, 李克金, 黄亨利, 季相凯, . 济南典型地层HSS参数选取及适用性研究[J]. 岩土力学, 2019, 40(10): 4021-4029.
[12]	郑刚, 栗晴瀚, 哈达, 程雪松, . 天津市承压层应力状态及减压引发沉降规律研究[J]. 岩土力学, 2018, 39(S2): 285-294.
[13]	王克忠, 金志豪, 杨麦珍, 刘先亮, 刘华, . 取水塔基坑开挖过程倒悬岩坎围堰渗透稳定性研究[J]. 岩土力学, 2018, 39(S2): 415-422.
[14]	张骁, 肖军华, 农兴中, 郭佳奇, 吴楠, . 基于HS-Small模型的基坑近接桥桩开挖变形影响区研究[J]. 岩土力学, 2018, 39(S2): 263-273.
[15]	刘成禹，郑智享，. 改进的基于p-y曲线的基坑围护结构计算方法[J]. , 2018, 39(S1): 446-452.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed