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联拱隧道施工工序繁复,少则十多步,多则二十多步,且联拱隧道不同的施工工序将对隧道围岩体应力场的时空产生不同程度的影响.如何优化施工工艺,减少施工工序,缩短工期,降低工程造价就显得尤为重要.提出根据联拱隧道不同部位重要性及破坏的容易程度赋予相应的权重,再结合不同施工工序形成的隧道围岩体塑性区大小作为收益函数进行“动态施工力学”的研究,具有较高的可靠性和借鉴意义.由此提出了双联拱隧道合理的优化施工工序,用以指导高速公路襄武段双联拱隧道的施工,取得了较好的社会经济效益.图4,表2,参8.
The construction process of the multi-arch tunnel is complicated, ranging from as few as 10 steps to more than 20 steps, and different construction procedures of the multi-arch tunnel will affect the space-time of the surrounding rock mass of the tunnel to varying degrees. How to optimize the construction process and reduce Construction process, shorten the construction period, reduce the cost of the project is particularly important.According to the importance of different parts of the multi-arch tunnel and the ease of damage given the appropriate weight, combined with the construction of different tunneling plastic body surrounding the rock size as a revenue function The research of “dynamic construction mechanics” has high reliability and reference significance.This paper proposed a reasonable optimization of the construction process of double-arch tunnel to guide the construction of double-arch tunnel of Xiang-Wu section of expressway, Achieved good social and economic benefits.Figure 4, Table 2, reference 8.