摘要
北京地铁四号线西直门站—动物园站区间隧道下穿既有高粱桥,为使高粱桥在隧道开挖施工过程中受到的影响达到控制要求,改变了隧道的开挖方法,由台阶法改为CRD法开挖,并对高粱桥进行了加固处理,通过数值模拟预测与现场测量的方法来监测控制桥墩的沉降以及桥墩之间的差异沉降。
The tunnels between Xizhimen station and Dongwuyuan station on metro line 4 in Beijing are planed to pass under the Gaoliang Bridge. In order to reduce the influence on Gaoliang Bridge due to the tunnel construction, the original method (bench method) of tunnel excavation is changed to CRD method and Gaoliang Bridge is also reinforced. The settlement of bridge pier and the differential settlement among bridge piers are monitored by the in-situ measurement, which are also predicted by the numerical simulation in this paper.
出处
《隧道建设》
2007年第S2期548-550,共3页
Tunnel Construction
关键词
差异沉降
深孔注浆
混凝土表面应变计
CRD施工
differential settlement
deep-hole grouting
surface strain gage
CRD construction
