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浙江大学学报(工学版)
浙江大学学报(工学版)  2017, Vol. 51 Issue (11): 2165-2174    DOI: 10.3785/j.issn.1008-973X.2017.11.010
土木与交通工程     
狭长型基坑工程坑底抗隆起稳定性分析
俞建霖1,2, 龙岩1,2, 夏霄1,3, 龚晓南1,2
1. 浙江大学 滨海和城市岩土工程研究中心, 浙江 杭州 310058;
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 310058;
3. 中国电建集团华东勘测设计研究院有限公司, 浙江 杭州 311122
Basal stability for narrow foundation pit
YU Jian-lin1,2, LONG Yan1,2, XIA Xiao1,3, GONG Xiao-nan1,2
1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2. Key Laboratory of Soft Soils and Geoenvironmental Engineering, Ministry of Education, Zhejiang University, Hangzhou 310058, China;
3. Power China Huadong Engineering Limited Corporation, Hangzhou 310058, China
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摘要：

针对狭长型基坑的特点，提出基坑坑底抗隆起稳定分析方法.对比常用的4种坑底抗隆起稳定分析方法及其异同点，结合2个实际工程进行相关算例的分析，指出在软弱土地基中规范要求的抗隆起稳定安全系数偏高；针对现有方法在狭长型基坑稳定分析中的局限性，提出考虑基坑宽度影响的坑底抗隆起稳定计算方法，分别探讨淤泥质土和粉土地基中基坑宽度、支护结构插入深度、开挖深度、土体抗剪强度指标和被动区加固等因素对狭长型基坑稳定性的影响.分析结果表明：采用该方法可以避免狭长型基坑中圆弧滑动面穿过对侧支护结构的问题，合理地考虑基坑宽度等因素对基坑稳定性的影响.
Abstract:

A new method was proposed for basal stability analysis, according to the characteristics of slim deep excavation. Basic principles of four common methods of basal stability analysis were compared, and the calculating results of two projects showed that the required safety factor of basal stability in soft clay given by technical code was much higher. The calculating method which considered the effect of excavation width was proposed, due to the limitations of existing methods for basal stability analysis on slim excavation. The effects of some factors including the depth and width of excavation, embedded depth, soil parameters and passive reinforcement area on basal stability were analyzed under the ground of muddy soil and silt. Results show that the method proposed can avoid the across of sliding surface to the collateral supporting structure in slim excavation and reasonably consider the effects of the width factor, etc. on basal stability.
收稿日期: 2016-09-20 出版日期: 2017-11-13
CLC:  TU470  
作者简介: 俞建霖(1972-),男,副教授,从事软黏土力学、基坑工程、地基处理及土工数值分析等研究.ORCID:0000-0001-7173-8991.E-mail:yujianlin72@126.com
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引用本文:

俞建霖, 龙岩, 夏霄, 龚晓南. 狭长型基坑工程坑底抗隆起稳定性分析[J]. 浙江大学学报(工学版), 2017, 51(11): 2165-2174.

YU Jian-lin, LONG Yan, XIA Xiao, GONG Xiao-nan. Basal stability for narrow foundation pit. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2017, 51(11): 2165-2174.

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http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2017.11.010    或    http://www.zjujournals.com/eng/CN/Y2017/V51/I11/2165

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