土工基础

›› 2019, Vol. 33 ›› Issue (4): 465-470.

• 工程实录 • 上一篇    下一篇

深基坑空间效应研究综述

付红梅1，张岩岩2   

  1. (1.重庆渝电工程监理咨询有限公司，重庆 400047；2.重庆大学土木工程学院，重庆 400045)
  • 收稿日期:2018-09-03 修回日期:2018-09-30 出版日期:2019-08-20 发布日期:2019-08-16
  • 作者简介:付红梅（1991-），女，助理工程师，研究方向为基坑工程与地基处理。

Research Status of Spatial Effect of Deep Excavations

FU Hongmei1, ZHANG Yanyan2   

  1. (1.Chongqing Yudian Engineering Inspection & Consulting Co. Ltd., Chongqing 400047;
    2.School of Civil Engineering, Chongqing University, Chongqing 400045)
  • Received:2018-09-03 Revised:2018-09-30 Online:2019-08-20 Published:2019-08-16

摘要： 分析了深基坑空间效应的影响因素，从数值模拟研究方法、理论分析方法以及工程实例应用三个方面回顾深基坑空间效应的国内外研究动态。在此基础上对当前研究现状存在的不足及展望进行概括，主要结论如下:数值模拟方法是研究深基坑空间效应的常用且有效的方法，但是数值模拟的分析结果还取决于所选取的本构模型以及计算参数；关于空间效应的理论的研究多是基于无粘性土、或者通过等效内摩擦角将粘性土转换为无粘性土基坑开挖空间效应影响的研究，而基于粘性土空间效应理论的研究仍有待进一步的开展；工程实例表明运用空间效应原理指导深基坑的施工效果较好，三维有限元分析结合工程实际监测信息可有助于空间效应规律的探索及其在实际工程中的应用。由于深基坑工程趋于长、大、深发展，基于空间效应长大深基坑工程变形控制的研究还有待进一步完善。

关键词: 深基坑, 空间效应, 数值分析, 理论研究, 工程应用

Abstract: This paper presents factors that affecting the spatial effect of deep excavations and state of the art of the deep excavations is reviewed from the numerical analysis, theoretical approach and engineering applications aspects. Both disadvantages and advantages aspects of the domestic sate of the deep excavation are also provided in the paper. The following conclusions can be obtained: the numerical analysis method is an effective tool studying the spatial effect of deep excavations by the validation of the numerical method is strongly influenced by the constitutive model and the material parameters; Majority of the theoretical approach on the spatial effect in the deep excavation are on the noncohesive soils or equivalent noncohesive soils converted from the effective internal friction angle. Further studies are needed for excavations in cohesive soils. The engineering applications indicate that the spatial effect can provide guidance for the construction. Threedimensional numerical analysis calibrated with the construction minoring can help understand the spatial effect in the deep excavation.

Key words: deep excavations, spatial effect, numerical simulation, theoretical approach, engineering applications