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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。
In the process of using the freezing method to build wells in the western part of our country, the fractured rock mass exists in the wellbore traversing strata. The freezing of the fractured rock mass leads to the deformation of the fracture surface and produces the frost heaving force, which adversely affects the stratum stability. Seriously endanger the safety of wellbore construction. Taking the actual engineering geological conditions of a shaft in the western part of the country as the background, the finite element numerical analysis of the geometric characteristics of the fractures and the frost heave of the fractured rock mass was carried out by using the ABAQUS finite element numerical analysis software. Expansion deformation, frost heaving force and the size of the fracture as a function of.