坑中坑基坑等效计算深度初探  

Preliminary Study of Equivalent Depth Calculation in Pit Retaining

作　　者：朱炎兵[1] 周小华[1] 廖少明[2] 

机构地区：[1]中铁第四勘察设计院集团有限公司,湖北武汉430063 [2]同济大学地下建筑与工程系,上海200092

出　　处：《岩土工程技术》2012年第2期65-69,共5页Geotechnical Engineering Technique

摘　　要：基坑工程中的坑中坑问题是一个非常普遍但又没有进行深入研究的问题,如何将坑中坑设计等效为常规设计是一个具有现实意义的难题。基于外墙最大墙体变形的等效原则,分析了等效方法的可行性,并通过对坑趾系数X、内外坑开挖宽度比α、内外坑开挖深度比β的分析,就等效计算深度的公式进行了初步探讨。Problem of ＂pit in pit＂ （PIP）is a universal problem which hasn＇t been researched deeply. It is the realistic meaning for the PIP＇s equivalent conventional design. According to the rules of equivalent outer protective structure ＇s maximum deformation, the feasibility of the equivalent method was studied. Through analyzing three important parameters： pit toe coefficient（X）, the area ratio of inside and outside（α）, the depth ratio of inside and outside（β）, a formulas is derived to calculate PIP＇s equivalent design depth.

关 键 词：坑中坑基坑 等效深度 面积比 深度比 坑趾系数 数值分析 

分 类 号：TU942[建筑科学—建筑技术科学] TU433