狭长矩形深基坑封底厚度计算研究
A Study of the Calculation of the Thickness of the Sealing Bottom of an Elongated Rectangular Deep Foundation Pit
  
中文关键词:地铁深基坑  突涌稳定性  封底加固  土体强度
英文关键词:subway deep foundation pit  surge stability  soil stabilization/solidification  soil strength
基金项目:
作者单位
赵京 中铁工程设计咨询集团有限公司北京100055 
董沂鑫 中铁工程设计咨询集团有限公司北京100055 
朱敏 中铁工程设计咨询集团有限公司北京100055 
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中文摘要:
      为避免地下明挖基坑工程遇到涌水等问题,通常对基坑底部采用封底加固处理。基于承压水基坑底板厚度的计算理论,以太原市某地铁明挖区间封底处理为工程背景。通过充分的考虑长条形地铁基坑的几何特性和加固土体自身的破坏特点,得出了地铁深基坑在坑底涌水后采取封底措施的封底加固体厚度的优化算法。该算法概念清晰,应用方便。与传统算法相比,能够大幅度缩减封底厚度,减少投资。
英文摘要:
      In order to prevent such problems as water inrush in the underground open cut foundation pit project from happening, the bottom of the foundation pit is usually sealed with grouting to consolidate it. In the light of the calculation theory for the thickness of the base slab of the foundation pit, and with the bottom sealing treatment for an open cut section of a certain subway in Taiyuan City as the engineering background, an optimized calculation method for the thickness of the sealing bottom of a deep foundation pit is obtained upon the basis of taking full account of the geometric characteristics of the elongated rectangular foundation pit of the subway and the failure characteristics of the reinforced soil body itself after the water inrush happens. The calculation method is clear in concept and convenient in application. Compared with the traditional algorithms, it can greatly reduce the thickness of the sealing bottom and save the cost.
赵京,董沂鑫,朱敏.狭长矩形深基坑封底厚度计算研究[J].国防交通工程与技术,2020,18(1):8~11,27
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