隧道工程环境影响的动态优化控制

DYNAMIC OPTIMIZATION CONTROL OF THE EFFECT ON ENVIRONMENT OF TUNNELLING

以地表最大允许沉降值maxw作为目标控制值,设计了一个用于制定隧道工程环境影响控制策略(施工技术措施)的动态优化模型。该模型通过方案设计与施工两个阶段的优化调整,预先将环境影响的风险因素合理地分配到施工的每一步,使每一步的施工技术措施都具有明确的环境控制目标;当实际情况与预测情况有偏差时,能够及时对施工方案的后续施工措施进行调整,如此反复,直至施工结束,即可对环境影响进行有效的控制。同时,还对目标限定值的规律进行了分析研究。

With the allowable maximum ground settlement as target value,a dynamic optimization model is designed to draw up the strategy(technical measures) controlling the effect of tunnelling on environment. Through adjusting the project during the stages of design and construction,the model distributes the risk of effect on environment to each step of construction reasonably and keeps the technical measures of each step with clear environmental control object. If there is deviation between practical situation and forecast,the model can adjust the technical measures of the subsequent steps and repeat like this until the construction is over. So the model can effectively control the effect of tunnelling on environment. At the same time the rule of the limitation of target value is also studied.