多荷载耦合作用下立井井壁潜在破坏区的确定

首先采用弹性理论对立井井壁进行了分析，建立了井壁破坏的理论模型，进而采用通用有限元软件ANSYS，建立了立井井壁的大型三维分离式有限元数值模型。运用这两种模型详细研究了多种荷载耦合作用对立井井壁的影响，多种荷载包括：随深度变化的土压力、随时间变化的疏水附加力以及井壁自身重量。确定了立井井壁在这三种荷载综合作用下的应力、应变集中区，论证了井壁破坏理论中疏水附加力理论的正确性，对井壁设计理论以及加固区域的确定提供了一定的理论指导。本文有限元模型的建立方法以及得到的结论，在一定程度上丰富了立井井壁理论的内容，增加了立井井壁理论研究的方法，促进了井壁附加应力说的发展。

Determination of shaft sidewall potential destruction region under multiple load and coupling action

The shaft sidewall is analyzed by elastic theory, and the theory model of sidewall damage is established in this paper. The large separated three-dimensional finite element numerical model of shaft sidewall is established by the general-purpose finite element software ANSYS to research the effect of multiple load and coupling action. The loads including： the earth pressure changed by the depth, the lyophobic additional force changed by the time, and the weight of the shaft sidewall. The stress and strain concentration region of the shaft sidewall under the three loads, and the correctness oflyophobic additional force theory is demonstrated. It can guide the shaft sidewall design theory and the determination of strengthening region. The establishing method of finite element model and the conclusions in this paper enrich the content and reserch method of shaft sidewall, and promote the development of sidewall additional stress to a certain extent.