隧洞开挖网络进度的优化研究

本文以单项工程为研究对象,以隧洞工程为例,研究了单项工程施工所需用的时间。文中以施工单位所具有的资源,结合施工工作环境、作业空间为约束条件,以费用最小为目标函数,建立了优化模型。由资源的工作性能指标,利用模糊数学原理,对资源间的匹配程度作了定量分析,并进一步推出了不同匹配程度的资源对作业时间的影响的计算式。并从影响各工序完工时间的因素的随机性出发,利用数理统计理论,由各工序的细分活动的规律推出了各工序的完工需用时间的概率表达式,解决了工期与置信度间的关系。最后结合工程实例,求出了一定置信度下,不同资源供应时的最优工期。

On optimization of tunnel excavation scheduling

With a tunnel for example,the construction period influenced by separate workshas been studied.With the resources belonging to the construction unit,the constructionenvironment and the operation space as the constraint conditions,and with the minimumcost as the objective function,an optimization model has been established.Based on theperformance targets of the resources,the quantitative analysis for the matching degree ofvarious resources has been carried out by means of the principle of the fuzzy mathematics, and the computation formula for effects of the different resources matching degree on operat-ing time has been obtained.In consideration of the randomness of the factors affecting thecompletion time of processes,and in terms of the theory of mathematical statistics,the prob-able expression,the relationship between the construction period and the confidence,of thecompletion time required by processes has been derived from the activity rules of the subdi-visible process.Finally,for an actual project used as an example,the optimum constructionperiods corresponding to various supply with different resources are obtained for a certainconfidence.