软弱地层地铁深基坑施工邻近建筑物微变形控制技术  

Micro Deformation Control Technology for Subway Deep Foundation Pit Construction Surrounding Buildings in Weak Strata

作　　者：王同华 WANG Tonghua(Beijing Urban Construction Design&Development Group Co.,Ltd.,Beijing 100037)

机构地区：[1]北京城建设计发展集团股份有限公司,北京100037

出　　处：《都市快轨交通》2025年第1期129-135,共7页Urban Rapid Rail Transit

基　　金：浙江省自然科学基金探索青年项目(LQ24E080016)。

摘　　要：针对软弱地层地铁深基坑施工时邻近建筑物微变形控制问题,以杭州地铁项目为例,介绍地下连续墙槽壁加固技术、袖阀管注浆加固技术、伺服钢支撑系统、地中壁加固开挖技术等微变形控制技术,分析软弱地层深基坑施工邻近建筑物变形特性和微变形控制技术效果。结果表明:袖阀管注浆加固技术可减小施工对邻近建筑物群的影响,抑制其变形;围护结构变形、周边变形通过槽壁加固技术得以抑制,围护结构质量得到提高;围护结构变形被伺服钢支撑系统有效抑制,减小周边变形;地中壁加固开挖技术控制基坑变形,减小时空效应影响。基本实现了深基坑周边建筑物群“微变形”的目标。The control of micro deformation of adjacent buildings during the construction of deep foundation pits in weak strata is one of the challenges in the geotechnical field.Taking the construction project of subway deep foundation pit of adjacent buildings in soft ground in Hangzhou as an example,this paper introduced the micro deformation control technologies such as the reinforcement technology of underground continuous wall trough wall,sleeve valve pipe grouting reinforcement technology,servo steel support system,and the reinforcement and excavation technology of underground middle wall,and analyzed the deformation characteristics and the effect of micro deformation control technology in the construction of deep foundation pit of adjacent buildings in soft ground.The results indicate that the sleeve valve pipe grouting reinforcement technology reduces the impact of construction on the surrounding building group and suppresses its deformation;the deformation of the enclosure structure and surrounding deformation can be suppressed through slot wall reinforcement technology,and the quality of the enclosure structure has been improved;the servo steel support system effectively suppresses the deformation of the enclosure structure and reduces the impact of construction on the surrounding area;cross wall and block excavation technology suppresses building deformation and weakens the impact of spatiotemporal effects.In the end,the surrounding buildings of the deep foundation pit basically achieved the goal of“micro deformation”.

关 键 词：城市轨道交通 软弱地层 建筑物群 地铁深基坑 微变形 控制技术 

分 类 号：TU94[建筑科学—建筑技术科学]