Advances in Constructional Engineering
Advances in Constructional Engineering. 2023; 3: (3) ; 10.12208/j.ace.20231007 .
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1 宁波工程学院 浙江宁波
2 宁波市轨道交通集团有限公司 浙江宁波
*通讯作者： 李斌锦,单位： 宁波工程学院 浙江宁波；
软土地区深基坑开挖至收底阶段，容易引发坑底隆起、支护结构严重变形等风险。实践表明，垫层浇筑是风险控制的有效手段。利用数值模拟方法，计算深基坑收底阶段不同垫层浇筑方案下支护结构的变形。研究结果表明，垫层浇筑对于支护结构变形有明显的改善作用，垫层面积越大，支护结构变形越小。研究成果有望应用于基坑的变形控制，从而提高施工安全性。
The excavation of deep foundation pits in soft soil areas can easily lead to risks such as heave at the bottom of the pit and severe deformation of the support structure. It is shown that cushion pouring is an effective means of risk control. Using numerical simulation methods, calculate the deformation of the support structure under different cushion pouring schemes during the last construction stage of deep foundation pits. The research results indicate that cushion pouring has a significant improvement effect on the deformation of the support structure. The larger the cushion area is, the smaller the deformation of the support structure is. The research results are expected to be applied to the deformation control of foundation pits, thereby improving construction safety.
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