南水北调中线北京段岩体隧洞围岩变形模量分析研究  

Study on deformation modulus of surrounding rock for rock tunnel in Beijing Section of Middle Route of South-to-North Water Diversion

作　　者：赵志江[1] 刘晓锋 王琪 林晶 刘增[1] 孙昊苏 袁鸿鹄[1] 高宁 ZHAO Zhijiang;LIU Xiaofeng;WANG Qi;LIN Jing;LIU Zeng;SUN Haosu;YUAN Honghu;GAO Ning(Beijing Institute of Water,Beijing 100048,China;Beijing South-to-North Water Diversion Daning Management Office,Beijing 102442,China;Beijing Institute of Water Planning and Research,Beijing 100017,China;Beijing Chaobai River Management Institute of Miyun District,Beijing 101502,China;Beijing Water Affairs Construction Management Center,Beijing 100036,China)

机构地区：[1]北京市水利规划设计研究院,北京100048 [2]北京市南水北调大宁管理处,北京102442 [3]北京市水务规划研究院,北京100017 [4]北京市密云区潮白河道管理所,北京101502 [5]北京市水务建设管理事务中心,北京100036

出　　处：《水利水电技术（中英文）》2024年第S01期182-187,共6页Water Resources and Hydropower Engineering

基　　金：北京市水务局五个一人才项目

摘　　要：岩体力学参数是影响地下工程围岩稳定的重要因素,确定合理的岩体变形模量对隧洞设计至关重要。结合南水北调中线北京段西甘池试验洞工程,对岩体进行静载荷试验分析研究,详细介绍试验点岩体的加卸载变形关系曲线,获得西甘池隧洞岩体变形模量参数建议值,为工程设计提供依据,并以期为类似工程的设计和施工提供参考。研究结果表明:试验压力较小时,各试点岩体变形或弹性模量的变化曲线有的升、有的降,试验压力大于0.4 MPa以后,各试点的变形模量和弹性模量逐渐趋于稳定;隧洞围岩变形控制及支护结构设计时,应根据各段围岩的岩性(大理岩、滑石片岩)、结构完整性、节理裂隙的空间展布方式以及发育充填情况等综合考虑,结合工程类比和地质经验最终确定岩体弹性参数的基本代表值。研究的方法和结论可为类似条件下隧洞工程的设计、施工提供参考和借鉴。The mechanical parameters of rock mass are important factors affecting the stability of surrounding rock in underground engineering.It is very important to determine the reasonable deformation modulus of rock mass for tunnel design.Combined with Xiganchi Test Tunnel Project in Beijing Section of Middle Route of South-to-North Water Diversion,the static load test analysis of rock mass is carried out.The loading-unloading deformation curve of rock mass at the test point is introduced in detail,and the recommended value of deformation modulus parameter of rock mass in Xiganchi tunnel is obtained,which provides the basis for engineering design and provides reference for the design and construction of similar projects.The result show that when the test pressure is small,the variation curves of deformation or elastic modulus of rock mass in each pilot increase or decrease.When the test pressure is greater than 0.4 MPa,the deformation modulus and elastic modulus of each pilot gradually tend to be stable.The deformation control of the surrounding rock of the tunnel and the design of the supporting structure should be based on comprehensive considerations such as the lithology(marble,talc schist),structural integrity,spatial distribution of joints and fissures,and development and filling conditions of each section of the surrounding rock,combined with engineering Analogy and geological experience finally determine the basic representative values of rock mass elastic parameters.The research method and conclusion can provide reference and reference for the design and construction of tunnel projects under similar conditions.

关 键 词：岩体 变形模量 静载荷试验 隧洞 南水北调 

分 类 号：TV223.1[水利工程—水工结构工程]