多功能孔压静力触探在大型水域工程含浅层气特殊地层勘察中的应用  

Application of multifunctional piezocone penetration test in the exploration of special strata with shallow gas in large water area engineering

作　　者：郭鹏鹏 王勇[1] 孔令伟[1] 余颂[3] 张国超[3] 张军杰[3] GUO Pengpeng;WANG Yong;KONG Lingwei;YU Song;ZHANG Guochao;ZHANG Junjie(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,Hubei,China;College of Civil Engineering,Guilin University of Technology,Guilin 541004,Guangxi,China;China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan 430050,Hubei,China)

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]桂林理工大学土木工程学院,广西桂林541004 [3]中铁大桥勘测设计院集团有限公司,湖北武汉430050

出　　处：《地基处理》2024年第6期595-602,共8页Journal of Ground Improvement

基　　金：国家自然科学基金重大仪器专项(52127815)。

摘　　要：含浅层气地层是我国长江中下游地区工程建设中常会遇到的一种不良地质。针对水域工程含浅层气地层勘探难度大、精度低等难题,以北沿江高铁崇太长江隧道遭遇含浅层气地质为研究背景,介绍了多功能孔压静力触探在水域含浅层气地层勘察中的应用;通过与钻探成果的对比分析,验证了静探方法的效果,获取了崇太长江隧道隧址沿线浅层气的分布情况与赋存特征。结果表明:多功能孔压静力触探能够有效获取含浅层气地质的信息,是一种经济、高效的水域含浅层气特殊地质勘探手段;采用辅助多功能参数对静力触探结果进行检验校正,可以实现含气层的精细化识别。本研究为大型水域工程的特殊地层勘探提供了技术支撑,亦可为类似工程提供借鉴。The shallow gas-bearing stratum is an unfavorable geology often encountered in engineering construction in the middle and lower reaches of the Yangtze River in China.In view of the difficulty and low precision of shallow gas-bearing stratum exploration in water area engineering,this study,taking the shallow gas-bearing stratum encountered in the Chongtai Yangtze River Tunnel of Beiyanjiang High Speed Railway as an engineering background,introduced the application of multifunctional piezocone penetration test and verified the effectiveness of this detection method.Then,the distribution and occurrence characteristics of shallow gas along the tunnel were obtained by means of comparison with the drilling results.The results show that the multifunctional piezocone penetration test is an economical and efficient method for exploring the unique shallow gas-bearing strata in water-based projects,which can obtain the information of gas-bearing strata effectively.The fine identification of gas-bearing strata can be achieved by using multifunctional parameters to check and correct the static detection results.This technique provides technical support for the investigation of special stratum in large water area engineering,and can also provide reference for similar projects.

关 键 词：孔压静力触探 浅层气 水下隧道 工程勘探 不良地质 含气地层 

分 类 号：TU413[建筑科学—岩土工程]