深基坑边坡位移突变原因及处理措施分析
摘要:基坑开挖是基础工程和地下工程施工中的一个重要课题，属于一个综合性很强的岩土工程问题，不仅涉及土力学典型的强度和稳定问题，而且还包含变形及涉及围护结构与土相互作用问题。随着大量城镇建设的发展，深基坑工程越来越多，基坑越挖越深，工程地质条件及基坑周边环境越来越复杂，造成了越来越多的基坑事故。每一种支护技术和设计方法都是以一定的假设条件（如地层参数、物理模型、边界条件等）为基础。但实际上，地层条件复杂多变，支护机理并非一个模式，施工过程中存在很多不确定的因素，随着时间的推移，部分因素还在不断地变化，某一环节出现问题都可能造成基坑边坡位移超限，对基坑本身的稳定性、周边建筑物的安全运行造成威胁，如应急处置不及时、措施不得当，极有可能诱发重大事故。以北京某桩锚支护基坑工程为例，对诱发基坑边坡变形超限的原因及控制措施进行了分析与总结。
Abstract:Foundation pit excavation is a foundation engineering and underground engineering construction of an important subject, belongs to a comprehensive geotechnical engineering problems, not only involves the strength and stability of the typical soil mechanics problems, but also contains the deformation and retaining structure and soil interaction issues. With the development of a large number of urban construction, the more and more deep foundation pit engineering, foundation pit digging ever deeper, engineering geological conditions and foundation pit surrounding environment more and more complex, has caused more and more pit accidents. Each kind of supporting technology and design method is based on certain assumptions, such as the formation parameters, the physical model, boundary conditions, etc. But in fact, the geological conditions are complex and changeful, supporting mechanism is not a pattern, there are many uncertain factors in the construction process, with the passage of time,some factors are still changing. Problems of a certain link may cause displacement of foundation pit slope overrun, threat the stability of foundation pit itself and threaten the safe operation of the surrounding buildings, such as the emergency disposal measures are not timely, not when, is likely to cause serious accident. This paper takes Beijing a pile anchor support of foundation pit engineering as an example, the cause of the foundation pit slope deformation induced overrun and control measures are analyzed and summarized.
中文标题：
深基坑边坡位移突变原因及处理措施分析
Deep Foundation Pit Slope Displacement Mutation Causes and Treatment Measures Reliability Analysis
作者：
苏铁志,马世敏,吴敏
Su Tiezhi,Ma Shimin,Wu Min
作者简介:苏铁志,男,1989年生,汉族,吉林松原人,硕士研究生,工程师,主要从事岩土工程设计及勘察。E-mail:sutiezhi@163.com
通讯地址：
航天建筑设计研究院有限公司, 北京 100070
ChinaAerospaceAcademyofArchitecturalDesign&ResearchCo.,Ltd,Beijing100070,China
中图分类号:TU941
doi:10.3969/j.issn.1007-2993.2018.02.008
出版物：岩土工程技术
收稿日期:2017-12-12
网络出版日期:2021-07-06
关键词:基坑开挖,深基坑,边坡变形超限,基坑事故,位移控制
Key words:excavation of foundation pit,deep foundation pit,slope deformation transfinite,foundation pit accident,the displacement control
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