冻结作用对含裂隙岩体的影响分析

摘要

在我国西部地区采用冻结法建井过程中,井筒穿越的地层中存在含有裂隙的岩体,裂隙岩体的冻结导致裂隙面的变形并产生冻胀力,对地层的稳定性造成不利的影响,严重危害井筒建设的安全性.以西部地区某立井井筒的实际工程地质条件为背景,运用ABAQUS有限元数值分析软件,对冻结作用中裂隙几何特征与裂隙岩体的冻胀变化规律进行了有限元数值分析研究,获得了裂隙冻胀变形、冻胀力与裂隙的尺寸之间的函数关系.%During the shaft construction that the freezing method is used in western China,the shaft crosses the fractured mass,the freezing on fractured rock mass leads to the deformation and frost heaving pressure on cracks,which causes adverse effect to the stability of the strata and serious damage to the safety of the shaft construction.In this paper,based on the actual conditions of western China shafts and the use of ABAQUS finite element analysis software,the crack feature and the frost heaving of the fractured rock mass change rules were carried out by finite element analysis,and the function relationship between them was got.