论文部分内容阅读
本文指出了以往冻结壁设计所存在的问题,认为用有限元法求解冻结壁应力和位移比较恰当。介绍了冻结壁有限元分析的基本理论、计算成果及其分析。提出了水平不动面的概念,并据此求冻结壁的绝对位移值。提出了用有限元法与现场观测相结合的办法推算冻土物理力学性质、并根据所求出的冻土物理力学性质进行冻结壁设计或予测未来井筒的井帮位移值。
This paper points out the problems existing in the design of the frozen wall in the past. It is appropriate to solve the stress and displacement of the frozen wall by the finite element method. The basic theory, calculation results and analysis of finite element analysis of frozen wall are introduced. The concept of horizontal fixed surface is proposed, and the absolute displacement value of the frozen wall is calculated accordingly. The physical and mechanical properties of frozen soil are deduced by combining the finite element method with the on-the-spot observation. According to the obtained physical and mechanical properties of frozen soil, freezing wall design or wellbore displacement prediction for the future wellbore is proposed.