炭质页岩隧道挤压性大变形机理探析及施工对策  

Analysis on the mechanism of large extrusion deformation of carbonaceous shale tunnel and construction countermeasures

作　　者：鲁兵舰 Lu Bingjian(Xi’an Railway Bureau Group Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]中国铁路西安局集团有限公司,陕西西安710054

出　　处：《山西建筑》2022年第13期152-155,共4页Shanxi Architecture

摘　　要：分析了西安—成都客运专线阜川隧道炭质页岩段发生挤压性大变形的原因及机理,指出导致大变形的原因主要有围岩软弱、岩层产状不利、岩体结构面发育、应力水平高以及构造运动历史复杂,而大变形的发生机理包括层状岩体的局部不利受力状态、软弱破碎腔形成高额散体围岩压力和地下水位变动导致松动圈扩大。在此基础上,提出了“积极主动,刚柔并济,控放结合”的炭质页岩隧道挤压性大变形控制理念和控制对策,并在现场应用中证明了措施的有效性。The reasons and mechanism of large extrusion deformation in the carbonaceous shale section of the Fuchuan Tunnel of the Xi’an-Chengdu Passenger Railway Line are analyzed. It is pointed out that the main reasons for the large extrusion deformation are weak surrounding rock, unfavorable occurrence of rock formation, high degree of development of joints, high stress level and complex tectonic movement history. The occurrence mechanism of large extrusion deformation includes the local unfavorable stress state of layered rock mass, the high scattered surrounding rock pressure caused by the crushing cavity, and the expansion of the loose ring caused by the fluctuation of groundwater level. On this basis, the control concept and control countermeasures of large extrusion deformation of carbonaceous shale tunnels are proposed, which are “active, adequate rigidity and flexibility, and combining control and release”. Through field application, the effectiveness of the countermeasure has been proved.

关 键 词：隧道工程 炭质页岩 挤压性大变形 大变形机理 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]