全断面深孔注浆技术在下穿既有建筑物地铁区间隧道的应用

Application of Full Section Deep Hole Grouting Technology in Subway Tunnel Under Existing Buildings

为分析全断面深孔注浆技术在下穿既有建筑物地铁区间隧道的应用,以区间下穿十里河桥工程为研究对象,借助现有工程技术、理论分析、工程经验等,进行了全断面深孔注浆技术在下穿既有建筑物地铁区间隧道中的应用分析,发现案例工程中的深孔注浆区域路面沉降和管线沉降累计量在合理沉降范围内,并未超过控制值,洞内初支变形也较为稳定,表明全断面深孔注浆技术在下穿既有建筑物地铁区间隧道工程中值得大幅度推广应用。

In order to analyze the application of full-section deep-hole grouting in subway tunnel under existing buildings,this paper analyzes the application of full-section deep-hole grouting in subway tunnel under existing buildings by means of existing technology,theoretical analysis and similar engineering experience,and obtains the deep-hole grouting.The accumulative calculation of pavement and pipeline settlement in grouting area does not exceed the control value.Within a reasonable settlement range,the deformation of the initial support in the tunnel is relatively stable,which is worthy of wide application.