摘要
高海拔寒区隧道裂隙岩体的冻胀危害着隧道的使用寿命,掌握寒区隧道围岩冻胀的基本规律十分重要。本文提出了寒区隧道中的低温裂隙岩体在冻融循环作用下的变形规律和冻胀力的产生机理;分析了冻胀力大小的影响因素,总结了冻融过程中裂隙水的迁移机制的研究现状。研究结果表明:冻胀力的大小与岩体力学性质、围岩初始含水量、冻结温度、围岩裂隙的几何形态和空间位置有关。
The freezing and swelling of fractured rock in tunnels in cold region with high altitude endangers the service life of tunnels,and it is important to grasp the basic laws of freezing and swelling of tunnels in cold region rock enclosures.This paper presents the deformation law of low-temperature fractured rock in tunnels in cold region under the action of freeze-thaw cycle,the mechanism of frost heave force generation;Analyses the factors influencing the magnitude of the frost heave force and summarize the current research status of the migration mechanism of fractured water during the freeze-thaw process.The research results show that the magnitude of the frost heave force is related to the mechanical properties of the rock mass,the initial water content of the surrounding rock,the freezing temperature,the geometry and spatial location of the surrounding fissures.
作者
杨自强
胥海洋
文渊
YANG Zi-qiang;XU Hai-yang;WEN Yuan(CCCC-SHEC Fourth Highway Engineering Co.,Ltd.,Luoyang 471013,China;School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454003,China)
出处
《价值工程》
2023年第3期128-130,共3页
Value Engineering
关键词
寒区隧道
冻胀力
冻胀机理
影响因素
tunnels in cold region
frost heave force
frost heave mechanism
influencing factors
