柱间支撑对基坑栈桥侧移刚度和稳定性影响研究

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关键词：基坑；栈桥；柱间支撑

中图分类号：TU391 文献标志码：A 文章编号：1003-5168（2025）16-0070-04

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.16.014

Study on the Influence of Column Bracing on Lateral Stiffness and Stability of Foundation Pit Trestle Bridge

XIAO Yanjie1GONG Nan²SHEN Fulin1 （1.Guangzhou Railway Polytechnic， Guangzhou 5113oo，China; 2.Dongying Technician College， Dongying 257091， China）

Abstract： [Purposes] In foundation pit engineering with complex surrounding environments，trestle bridges are often constructed to meet the requirements of material stacking and construction vehicle traffic.However，current Chinese specifications for foundation pits stillprovide limited guidance on trestle bridge design and construction.This study focuses on the column bracing system of foundation pit trestle bridges.[Methods] Using ANSYS，a structural simulation model was established to compare the lateral stiffness of structures with diferent column bracing arrangements.The influence of column bracing on structural buckling load was analyzed，and optimal bracing positions were investigated.[Findings] The results demonstrate that column bracing reduces lateral displacement of the trestle bridge by more than 18% and increases buckling load by more than 24% ， indicating that proper column bracing arrangement can effectively enhance both lateral stiffnessand stabilityof trestle bridges in acost-effectiveand convenient manner.[Conclusions] The findings provide valuable references for engineering practice.

Keywords： foundation pit; trestle bridge; column bracing

0 引言

在基坑施工过程中，当土方开挖区域内的土质条件不适于修筑坡道或基坑周边空间不足时，通常需要设置施工栈桥以确保作业顺利进行。（剩余3988字）