框格式地下连续墙结构型式对其应力变形的影响研究

Impact of frame-structured diaphragm wall types on their stress and deformation

框格式地下连续墙是地下工程的关键围护结构,研究其结构型式对应力变形的影响对于优化设计和增强工程安全性具有重大意义。本研究以沙坪一级水电站深覆盖层的框格式地下连续墙为对象,深入剖析其结构特点、施工方法和受力情况,并采用非线性有限元分析方法模拟不同工况下的施工过程。计算结果表明,结构型式显著影响着连续墙的应力分布和变形行为,尤其在最不利工况和桩墙接头薄弱处应力表现突出。此外,当地下连续墙主体结构受到冲刷时,桩墙所受拉应力随冲刷深度增加而增大。基于这些发现,本文提出了优化结构型式和改进施工工艺的建议,以减小应力变形,提升工程安全性,研究结果可为类似工程设计提供参考。

As a key protective structure in underground engineering,the study of frame-structured diaphragm walls and their impact on stress and deformation is crucial for optimizing design and enhancing engineering safety.This paper focuses on the frame-structured diaphragm wall of the Shaping First Hydropower Station,analyzing its structural characteristics,construction methods,and stress condition.Nonlinear finite element analysis is employed to simulate the construction process under different conditions.The results indicate that the structural type significantly affects the stress distribution and deformation behavior of the diaphragm wall,particularly under the most adverse conditions and at weak points in the pile-wall joints.Furthermore,as the main structure of the diaphragm wall experiences scouring,the tensile stress on the piles increases with the depth of scouring.Based on these findings,this study offers recommendations for optimizing structural types and improving construction techniques to reduce stress deformation and enhance engineering safety,providing valuable references for similar engineering designs.