摘要
为全面认识川藏铁路隧道TBM施工地质适应性问题,分析其主要不良地质条件,系统研究TBM施工适应性特点,从岩爆、软岩大变形、涌突水、高地温4个方面论证,得出TBM施工的地质适应性为"弱适应",并分别阐述TBM施工的关键技术:1)岩爆及软岩大变形区域,根据地质预报及现场工作情况采取相应的支护措施及施工对策;2)涌水段施工,针对裂隙状渗水、非裂隙状涌水,可采取"水压分流排水+灌浆封堵加固"进行处理;3)高地温段施工中,除常规通风物理降温措施外,针对富热水高温段还需采取限量排水、注浆封堵以减少热水涌出量,并采取结构防热。
To fully study the geological adaptability of TBM in Sichuan-Tibet railway tunnel construction,the main unfavorable geological conditions of Sichuan-Tibet railway tunnel are comprehensively analyzed and the adaptability characteristics of TBM are systematically studied.With analysis of the four aspects of geological conditions,i.e.rock burst,large deformation of soft rock,water inrush,and high ground temperature,it is demonstrated that the geological adaptability of TBM construction is weak.The key techniques of TBM construction are described as follows:(1)In the area of rockburst and large deformation of soft rock,corresponding support and construction countermeasures should be taken according to geological prediction and field conditions.(2)For fractured seepage and non-fractured water inrush,the construction of water inrush section can be treated by hydraulic shunt drainage or grouting plugging and reinforcment.(3)In addition to the conventional ventilation physical cooling measures in the construction of high ground temperature section,limited drainage and grouting should be adopted to reduce the amount of hot water gushing in the high-temperature section with rich hot water,and structural heat prevention should be adopted.
作者
王彦杰
李苍松
史永跃
张涛
王彬
WANG Yanjie;LI Cangsong;SHI Yongyue;ZHANG Tao;WANG Bin(School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,Sichuan,China;China Railway Southwest Research Institute Co.,Ltd.,Chengdu 611731,Sichuan,China)
出处
《隧道建设（中英文）》
CSCD
北大核心
2021年第S01期470-477,共8页
Tunnel Construction
基金
中铁西南科学研究院有限公司科技项目(2019-Z004-KJB04-DZ)
关键词
铁路隧道
川藏铁路
TBM施工
不良地质问题
地质适应性
施工对策
railway tunnel
Sichuan-Tibet railway
TBM construction
unfavorable geological problem
geological adaptability
construction countermeasure
