小断面深埋TBM隧洞穿越不良地质段卡机脱困措施研究  

RESEARCH ON JAMMING RELEASING MEASURES FOR SMALL SECTION DEEP-BURIED TBM TUNNEL CROSSING UNFAVORABLE GEOLOGICAL SECTION

作　　者：任小强[1] 杨平 黄鹤 杜泽东 仲华亮 Ren Xiao-qiang;Yang Ping;Huang He;Du Ze-dong;Zhong Hua-liang

机构地区：[1]中国水利水电第五工程局有限公司,成都610066

出　　处：《建筑技术开发》2023年第7期129-131,共3页Building Technology Development

摘　　要：为探究小断面深埋TBM隧洞在穿越不良地质段卡机脱困措施,以垣曲二期抽水蓄能电站建设前期的地质勘探平硐为工程背景,总结工程实践经验,提出了正常围岩段以关注刀盘扭矩突变值为主,及时停机处置。对于小规模的不良地质体,要以快速通过、控制变形、减少出渣为原则进行施工。对于大型破碎不良地质体,通过超前加固和及时支护控制围岩塌方和变形,同时加固掌靴处围岩稳定性提高推进力可以避免卡机事件的发生。如果出现了由于塌方引起的卡机,盾顶小导坑辅助脱困技术可以解除卡机。In order to explore the jamming and releasing measures of small section deep buried TBM tunnel crossing unfavorable geological section,this paper takes the geological exploration adit in the early stage of Yuanqu II pumped storage power station construction as the engineering background,summarizes the engineering practice,and puts forward that the normal surrounding rock section should focus on the sudden change value of cutterhead torque and stop the machine in time.For small-scale unfavorable geological bodies,construction should be carried out on the principle of rapid passage,deformation control and slag reduction.For large broken unfavorable geological bodies,the collapse and deformation of surrounding rock can be controlled by advanced reinforcement and timely support.At the same time,the stability of surrounding rock at the boot is strengthened to improve the thrust force,which can avoid the occurrence of jamming.If there is a jam caused by the collapse,the shield top small guide pit auxiliary de-trapping technology can achieve de-trapping.

关 键 词：小断面深埋 TBM隧洞 不良地质 卡机脱困 

分 类 号：U455.49[建筑科学—桥梁与隧道工程]