岩体动态施工力学与动态规划原理在工程中的应用

The Application of Dynamic Construction Mechanics and Dynamic Programming Principles for Rock Engineering

提出了岩体动态施工力学这一新的研究方向及其原理,先以二滩工程洞室群不同施工方案的围岩非线性数值稳定分析为例,说明施工顺序优化研究的重要性。再以广蓄电站洞室群的施工方案优化问题为例,应用动态规划原理,用洞周破损区面积表示收益函数,给出一种搜索洞室群最佳施工方案的方法。最后结合广蓄电站地下洞室进行了四种不同应力情况下的优化分析,并评估了实际的施工步骤的稳定性。

Dynamic construction mechanics of rocks was proposed as a new research direction and its contents and principles were given. Firstly, taking a non—linear analysis of surrounding rock stability of a cavern group of a large—scale hydropower station project at different construction schemes as an example, the importence of majorization for excavation order was expressed. Then, taking a construction optimization of a large—size group of caverns construction as an example, dynamic programming was used with return function indicated through the failure zone areas around the caverns, and a method was given for searching the optimal construction scheme, which greatly improved previous work. Finally, optimizing analysis was performed for 4 types of stress field cases of the underground caverns of a power station in Guangdong Province. The assessment of the stability of the real construction steps was given and some significant conclusions were obtained.