可拓学理论在城市地下工程爆破方案优化的研究应用

Research and Application of Extension Theory in Blasting Scheme Optimization in Urban Underground Engineering

城市地下工程爆破需要考虑施工对周围环境的影响,对工程方案决策往往需要考虑爆破质量、环保、安全、爆破成本等多个评价指标。但在工程实践中,各个评价指标往往不在同一范围内,这给城市地下工程爆破的整体评价比较带来了困难。文章利用可拓学理论建立了爆破方案评价模型,通过计算各指标物元域,对各评定等级的符合程度做出综合评定,把工程爆破方案评估由定性评估转化为定量评估,并以重庆市某地下工程爆破为例,利用建立的数学模型对该工程拟采用的爆破方案进行了评估。结果表明,该方法采用组合权重可减小人为主观因素造成的偏差,具备多个方案比较优选的可应用性。

The blasting construction in urban underground engineering needs to consider the impact of construction on the surrounding environment,and many evaluation indexes such as blasting quality,environmentad protection,safety,blasting cost and so on need to be considered in the decision-making of the engineering scheme.However,in engineering practice various evaluation indexes are often not in the same range,which will bring some difficulties to the overall evaluation and comparison of urban underground engineering blasting construction.In this paper,the evaluation model of the blasting scheme is established by using extension theory,and the assessment of the engineering blasting scheme is transformed from qualitative evaluation to the quantitative evaluation by calculating the object-element domain of each index and making a comprehensive evaluation on the coincidence degree of each evaluation grade.Taking an underground project in a city as an example,the established mathematical model is used to evaluate the blasting scheme of the project.The results show that the method can reduce the deviation caused by subjective factors by means of using combined weights and has applicability to comparison and optimized selection of various schemes.