钢支撑伺服系统在软土基坑工程中的应用研究  

Research on applications of steel tube bracing axial pressure servo systems in soft soil foundation pit projects

作　　者：徐琳 黄程翔 金中雨 陈民富 孙富学 Xu Lin;Huang Chengxiang;Jin Zhongyu

机构地区：[1]浙江兴业市政工程有限公司,浙江温州325006 [2]温州大学建筑工程学院,浙江温州325006 [3]温州市城市基础设施建设投资有限公司,浙江温州325006

出　　处：《现代城市轨道交通》2023年第1期49-54,共6页Modern Urban Transit

摘　　要：软土地区基坑开挖时,对基坑变形控制要求较高,越来越多的基坑工程采用钢支撑伺服系统进行支护。为探究钢支撑伺服系统在基坑变形中的控制效果,文章基于软土地区某基坑工程,选取钢支撑伺服系统支护典型断面,依据现场监测数据分析深基坑围护结构的变形规律。监测数据分析结果表明:各道钢支撑轴力随开挖深度的增加而增大,基坑开挖期间支撑预加轴力维持在设计预加轴力附近,伺服段土体最大深层水平位移较普通段小36.6%。在软土地区,钢支撑伺服系统对基坑围护结构变形有较好的控制效果,针对围护结构变形要求较高的基坑,可以积极采用钢支撑伺服系统。When the excavation of foundation pit in soft soil areas are carried out, they require higher deformation control, and more and more foundation pit projects are supported by steel tube bracing axial pressure servo systems. To explore the controlling effect of steel tube bracing axial pressure servo systems in foundation pit deformation based on a foundation pit project in soft soil area, the typical supporting section of a steel tube bracing axial pressure servo system is selected, and the deformation law of deep foundation pit retaining structure is analyzed according to site monitoring data. The analysis of monitoring results shows that the axial force of each steel support increases with increasing excavation depth, and the bracing pre-axial force of the support stays near the designed bracing pre-axial force during the period.The maximum deep horizontal displacement of the servo section is 36.6% smaller than that of the ordinary section. In the soft soil area, the steel tube bracing axial pressure servo system has a good effect on controlling the deformation of the retaining structure of the foundation pit. For the foundation pit with high deformation control requirements of the retaining structure, the steel tube bracing axial pressure servo system can be actively used.

关 键 词：市域铁路 深基坑 钢支撑伺服系统 现场监测 预加轴力 温州 

分 类 号：U231.3[交通运输工程—道路与铁道工程]