道路填土引发软土地铁盾构隧道变形案例及整治技术  

Case study and treatment technology for deformed shield tunnel in soft soils induced by road construction

作　　者：王如路[1] 袁强 梁发云[2] 王鲁杰 WANG Rulu;YUAN Qiang;LIANG Fayun;WANG Lujie(Shanghai Shentong Metro Group Co.,Ltd.,Shanghai 200070,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海申通地铁集团有限公司,上海200070 [2]同济大学地下建筑与工程系,上海200092

出　　处：《岩土工程学报》2023年第1期112-121,I0007,I0008,共12页Chinese Journal of Geotechnical Engineering

基　　金：上海市优秀技术带头人计划项目(21XD1430900)。

摘　　要：随着轨道交通网络的逐渐完善以及城市化的不断推进,临近地铁隧道的加、卸载工况频发,对地铁隧道的健康状态产生不利的影响。上海某地铁区间由于道路填土导致隧道发生了159 mm(也即25.6‰D,D为隧道直径)的横向大变形,引起结构产生漏水漏泥、接头张开等严重的结构病害。全面记录了该工程案例的详细情况,包括工程地质资料、道路施工情况、隧道变形形式以及后续的变形整治措施等,并对整治效果进行了定量分析,特别是侧向微扰动注浆技术的修复效果。现场数据表明:道路施工引起隧道横向变形增量约为30~50mm,局部明浜回填会加剧变形的发展;侧向微扰动注浆能够有效地修复隧道已发生的横向变形,且注浆量与隧道变形量存在定量关系,并且明显受到注浆前隧道变形量大小的影响;道路卸载后回填以及后续的钢板加固,能够在保证工程建设的同时,又能保证隧道结构的安全。With the gradual improvement of urban rail transit network and the development of urbanization in China,the loading and unloading conditions near the metro tunnels are becoming more and more frequent,which seriously threaten the safety of the lining structures and their serviceability.A field case of deformed shield tunnel in Shanghai caused by road construction is introduced.The transverse deformation of the tunnel is very large,which is 159 mm(i.e.,25.6‰ D,D is the tunnel diameter),resulting in serious structural damage,such as water leakage,mud leakage,joint opening,etc.The details of the field case are comprehensively recorded,including engineering geological data,road construction,tunnel deformation forms and subsequent deformation treatment measures,and a quantitative analysis is made on the treatment effects,especially the repair effects of lateral small disturbance grouting technology.According to the monitoring and inspection data,it is found that the convergence deformation caused by road construction is about 30~50 mm,which can be exacerbated by the river backfilling.The soil grouting at the both sides of the tunnel spring line can reduce tunnel convergence effectively,and the effectiveness is closely related to the magnitude of tunnel convergence before grouting.The installation of steel plates can improve the bearing capacity of tunnel lining ring so as to ensure the road construction and the safety of the tunnel.

关 键 词：道路填土 地铁隧道 收敛变形 变形整治 注浆技术 

分 类 号：TU473[建筑科学—结构工程]