伺服钢支撑对围护结构的变形影响研究  

Study on Deformation Effect of Servo Steel Support on Enclosure Structure

作　　者：王小兵 万强 唐晓林 秦金龙 罗青 丁海滨[3] 杨建辉[4] Wang Xiaobin;Wan Qiang;Tang Xiaolin;Qing Jinlong;Luo Qing;Ding Haibin;Yang Jianhui(Nuclear Industry East China Construction Engineering Group Co.,Ltd.,Nanchang 330013,China;Jiangxi Survey and Design Institute Co.,Ltd.,Nanchang 330013,China;State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;Zhejiang University of Science and Technology,Hangzhou 310023,China)

机构地区：[1]核工业华东建设工程集团有限公司,南昌330013 [2]江西省勘察设计研究院有限公司,南昌330013 [3]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,南昌330013 [4]浙江科技学院,杭州310023

出　　处：《科技通报》2023年第10期58-65,75,共9页Bulletin of Science and Technology

基　　金：国家自然科学基金—重点项目(52238009);浙江省重点研究计划(2021C01131)。

摘　　要：本文依托某工程,通过数值模拟和理论分析,对伺服系统作用机理、变形控制效果展开研究和运用弹性薄板理论,通过引入支撑轴力修正系数,采用叠加法建立基于轴力控制的围护结构变形方程。结果表明:伺服钢支撑通过对支撑轴力进行主动控制,弥补钢支撑的压缩量,更有效地限制地连墙的变形;伺服轴力越大,围护结构的变形越小;全部施加伺服轴力,围护结构的变形控制效果越好;利用薄板理论计算地连墙水平位移,其计算结果与计算值在变化趋势上是一致的,证明了该方法的可靠性,并且计算开挖面及以下部分比开挖面以上部分更加吻合。In this paper,based on a project,through numerical simulation and theoretical analysis,the action mechanism and deformation control effect of the servo system are studied and the elastic thin plate theory is applied.By introducing the correction coefficient of the supporting axial force,the deformation equation of the envelope structure based on the axial force control is established by the superposition method.The results show that the servo steel support can make up for the compression of the steel support and limit the deformation of the ground connecting wall more effectively through the active control of the support axial force.The larger the servo axial force is,the smaller the deformation of the enclosure structure is.The deformation control effect of the enclosure structure is better when all servo axial force is applied.The thin plate theory is used to calculate the horizontal displacement of the connecting wall,and the calculated results are consistent with the calculated values in the trend,which proves the reliability of the method,and the calculated excavation face and the parts below the excavation face are more consistent than the parts above the excavation face.

关 键 词：基坑工程 伺服钢支撑 数值模拟 弹性薄板理论 

分 类 号：TU463[建筑科学—结构工程]