哈尔滨人防改造工程监控量测技术研究

Study of Monitoring Technology in the Harbin Civil Air-Defense Reconstruction

文章根据季节性冻土地区隧道扩挖的监测(以建筑物沉降、地表沉降、围岩位移为主)成果,对影响施工安全的主要因素做了综合性分析和探讨。研究成果表明:隧道扩挖对建筑物沉降和围岩位移的影响较小,而对地表沉降的影响较大;雨季的到来对建筑物、地表的影响较小,但对明挖区间的建筑物、地表影响较大,尤其是边坡;季节性冻土对明挖段附近的建筑物和地表的影响比暗挖区间大,对暗挖处的围岩位移影响较小,但对处于交通要道处的地表沉降影响很大;临时钢支撑的架设对围岩位移和地表沉降的控制效果较好,表明临时支护措施是及时和安全的。

Based on the monitoring of building settlement, ground settlement and displacement of surrounding rock during tunnel expansion within a frost zone, this paper analyzes and discusses the factors affecting construction safety. The results indicate that tunnel expansion had less impact on building settlement and displacement of surrounding rock than on ground settlement. The buildings and ground were slightly affected by the rainy season, except in the open-cut zone-especially the slopes. The buildings and ground in the open-cut zone are more affected by seasonal frost than the bored tunnel zone is; while the displacement of surrounding rock in the bored tunnel section is minimally affected by the frost zone, the ground settlement in the arterial line is greatly affected by it. The use of temporary steel struts to control displacement of surrounding rock and ground settlement is discussed.