钻探工程2025，Vol.52Issue(3)：47-54,8.DOI:10.12143/j.ztgc.2025.03.006
引黄济宁工程隧洞古近系软岩物理力学特征研究
Study on the physical mechanics characteristics of the paleogene soft rock in the tunnel of Yellow River to Xining water diversion project
摘要
Abstract
The Paleogene strata is widely distributed in the tunnel of the Yellow River to Xining water diversion project in Qinghai Province,and the tunnel burial depth is deep.It is of great significance for tunnel design and construction to evaluate the deformation and stability of tunnel surrounding rock based on the study the physical mechanical characteristics of the Paleogene strata.In view of the stability of the surrounding rocks in Paleogene strata,A preliminary study on the physical mechanics of soft rock was conducted using experimental and empirical analysis methods.The results showed that the Paleogene strata has low density and high water absorption rate.Under saturated conditions,the uniaxial compressive strength of rocks decreases sharply,and the softening coefficient is extremely low;Some types of rock have expansibility and a small amount of rock has poor resistance to disintegration;The mechanical properties of the rock are poor under water-rich conditions,which is detrimental to the stability of the surrounding rocks.When the burial depth is over 127m,the surrounding rocks may undergo severe to extremely severe compression deformation.During the construction,targeted engineering measures should be taken based on the deformation characteristics of the surrounding rocks to reduce the hazard of surrounding rock deformation.关键词
引水隧洞/古近系地层/物理力学特征/强度应力比/挤压变形/引黄济宁工程Key words
water divertion tunnel/Paleogene strata/physical mechanical properties/strength-stress ratio/compressional deformation/Yellow River to Xining water diversion project分类
地质学引用本文复制引用
杨继华,郭卫新,万伟锋,刘振红,姚阳..引黄济宁工程隧洞古近系软岩物理力学特征研究[J].钻探工程,2025,52(3):47-54,8.基金项目
黄河勘测规划设计研究院有限公司自主研究开发项目"深埋长隧洞第三系软岩变形特征及控制技术研究"(编号:2022KY003)、"引黄济宁工程深埋超长隧洞施工期超前地质预报关键技术研究及应用"(编号:2023KY014) （编号:2022KY003）
