冻土地区人防改造对地表沉降影响规律的研究

Study on the Influence of Civil Air Defense Work Redevelopment on Surface Settlement in Frozen Region

通过对哈尔滨市地铁烟厂站—工程大学明挖段区间地表沉降的监测,分析了影响地铁地表安全的主要因素,总结出了扩挖施工引起地表沉降的横向和纵向分布规律,同时验证了扩挖施工的合理性。研究成果表明,冻融现象、支护方式、地面车流量、开挖方式是影响地表沉降的主要因素。从监测结果来看,地表的沉降基本在报警值以内,在特殊路段出现险情后,抢救措施是有效的。

By monitoring the surface subsidence during the open excavation of the cigarette factory to engineering university segment in Harbin metro station construction,the authors analyzed the impact of the main factors on surface safety of tunnels,summarized the principles for the transverse and longitudinal distribution of surface subsidence caused by expansive digging,and verified the rationality of expansive digging.Research results show that the freeze-thaw phenomenon,the supporting method,ground traffic flux and excavation method are the main factors that influence the surface subsidence.Monitoring results show that monitored surface settlement value was less than alarming value and the rescue measures adopted were effective when dangerous situations occurred in special road sections.