新建地铁隧道穿越煤矿塌陷区综合处治技术  

Research on the Comprehensive Treatment Technology of New Subway Tunnel Through Coal Mine Collapse Area

作　　者：田书广[1] TIAN Shuguang(China Railway 16th Bureau Group Co.,Ltd.,Beijing 100018,China)

机构地区：[1]中铁十六局集团有限公司

出　　处：《施工技术》2019年第22期80-84,共5页Construction Technology

基　　金：国家自然科学基金(51504016)

摘　　要：以新建乌鲁木齐轨道交通1号线南湖北路站-王家梁站区间穿越六道湾村煤矿采空区为例,首先对塌陷区及侧壁围岩稳定性进行分析,可知南、北大槽塌陷区均不宜作为地铁隧道结构直接持力层,应进行塌陷区的加固处治,以保证地铁隧道结构地基的稳定性。然后采用相似模拟试验的方法,模拟塌陷区侧壁围岩在荷载作用下发生再次塌陷失稳破坏的过程,可知南、北大槽塌陷区围岩发生再次塌陷失稳破坏的最大影响范围分别为13. 2,15. 6m,并依此提出塌陷区"桩基+地下梁+锚杆桩+斜拉锚索"综合处治方案,最后进行数值模拟分析及现场验证,可知加固后的塌陷区无论是地基承载力还是抗压强度均满足设计要求。Taking the section between Nanhubei Road Station and Wangjialiang Station of the newly-built Urumqi Rail Transit Line 1 crossing the mined-out area of Liudaowan Coal Mine as an example,the stability of the collapsed area and the surrounding rock of the side wall is analyzed at first,and it is concluded that the collapsed area of the Nandacao and the Beidacao should not be used as the direct bearing layer of the subway tunnel structure,and the reinforcement of the collapsed area should be carried out to ensure the foundation stability of subway tunnel structure. Then,using the method of similar simulation test,the process of collapse and instability failure of the surrounding rock of the side wall of the collapsed area under the action of load is simulated. It is concluded that the maximum influence range of collapse and instability failure of the surrounding rock of the collapsed area of the Nandacao and the Beidacao is 13. 2 m and 15. 6 m respectively. Based on this,the comprehensive treatment scheme of " Pile foundation + Underground beam + Anchor pile + Cable stayed anchor " in the collapsed area is put forward. Finally,numerical simulation analysis and field verification are carried out,it is concluded that both the bearing capacity and compressive strength of the collapsed area after reinforcement can meet the design requirements.

关 键 词：地铁 塌陷区 综合处治技术 试验 数值模拟 现场验证 

分 类 号：TU452[建筑科学—岩土工程]