吉图珲高速铁路隧道工程地质问题探讨

摘要

Jilin⁃Tumen⁃Hunchun High⁃speed Railway is located in the middle⁃low mountains of the middle part of Changbai Mountain. The area characterizes greatly undulate terrain, various stratum lithology, complex geological structure and spe⁃cial climatic environment. The tunnel engineering geological problems are prominent, such as high ground stress, swelling property of soft rock, basalt caprock, granite alteration zone, carbonaceous muddy slate and other engineering geological problems. According to discussions on the engineering characteristics and geological factors of these problems mentioned a⁃bove, the article put forward the corresponding response, by means of advanced forecasting, geology checking, monitoring and measuring results and scientific research conclusion, to determine the classification of surrounding rock, supporting de⁃sign parameters and construction measures.%吉图珲高速铁路所经长白山中段中低山区，地形起伏变化大，地层岩性多样，地质构造复杂，气候环境特殊。隧道工程地质问题突出，主要有高地应力、软岩膨胀性、玄武岩岩盖、花岗岩蚀变带和含碳泥质板岩等工程地质问题。通过探讨这些问题的工程特性和地质成因，提出了根据超前预报、地质核对、监控量测结果和科研结论，确定围岩分级、支护设计参数和施工措施的应对之策。