盾壳摩擦对周围土体工作性状影响的研究  

Influence of Shield Shell Friction on Surrounding Soil Mass Properties

作　　者：郑刚[1] 路平[2] 姜晓婷[1] 崔玉娇[1] 高超[1] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]海南大学土木建筑工程学院,海口570228

出　　处：《现代隧道技术》2017年第3期65-72,共8页Modern Tunnelling Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2010CB732106);海南省自然科学基金项目(20165188)

摘　　要：文章以天津地铁二号线东南角站至建国道站区间左线盾构掘进项目为依托,采用ABAQUS对盾构掘进过程产生的地表沉降进行了计算,并结合工程实测结果对其进行验证,并进一步分析了在一定掌子面推力下的盾构掘进过程中,不同盾壳摩擦作用对周围土体变形与受力的影响。研究结果表明:盾壳摩擦作用对土体沿掘进方向的水平位移和附加应力影响较大,且影响最敏感区域位于盾构机头和盾尾附近;当距离隧道超过一倍隧道直径时,盾壳摩擦产生的土体附加应力衰减至可被忽略的程度。Based on the left line of the shield running tunnel from Dongnanjiao station to Jianguo station on the Tianjin Metro line 2, a calculation of surface settlement induced by shield driving was carried out by ABAQUS, and verification was performed on the basis of measured results to further analyze the influence of different shield shell frictions on the deformation and force of the surrounding soil mass during shield driving for a certain thrust of the work face. The results show that the horizontal displacement and additional stress toward the direction of driving are greatly influenced by the function of the shield shell friction, especially at the most sensitive section at the shield head and near the shield tail; when the distance from the tunnel is equivalent to the tunnel length or greater, the additional stress of the soil mass due to shield shell friction decreases and can be disregarded.

关 键 词：盾构隧道 盾壳摩擦 土体变形 附加应力 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]