在交通工程中，由于隧道结构的特殊性和所处环境的复杂性，隧道工程建设中的洞轴线走向的选择尤为重要。本文简述了Unwedge程序的工作原理，运用此程序，考虑计算区域内不同结构面组合及不同洞室走向条件下围岩关键块体的大小，通过比较不同走向下块体的稳定，评价洞室围岩稳定性，提出洞室的合理走向；此外，运用了石根华的不连续变形理论分析围岩在多组结构面切割下的稳定情况，用DDA模拟了隧道的围岩应力状况。%In traffic engineering, due to the particularity of the tunnel structure and the complexity of the environment, the choice of the tunnel axis trend in the tunnel construction is particularly important. This paper outlines the working principle of Unwedge program, which evaluates cavern stability of surrounding rock, and puts forward the reasonable trend of the cavern by considering the size of surrounding rock key block with different structural surface combinations and different chambers in the calculation region and comparing the stability of the block in different trend. In addition, it analyzes the stability of surrounding rock in the cut of the multi-group structural surface using the theory discontinuous deformation analysis of Dan Genhua , and simulates tunnel surrounding rock stress with DDA.
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