重要构筑物旁地震液化带处治方案优选分析

Optimum Selection Analysis of Treatment Plans for Seismic Liquefaction Zone Beside Important Structures

文章以某高速公路建设项目地震液化带不良地基处治工程为依托,开展了地震液化带抗液化处治方案分析和优化比选。基于液化带区域高速公路沿线构筑物的重要性和处治方案的可行性分析,从常用的地震液化带处治方案中选取3种可行方案,以经济、技术成熟度、工期和环境保护作为评价指标,采用层次分析方法对选取的方案进行优化。结果表明:层次分析法优选得到的砂砾桩法可以有效改良地震液化带不良地基,不仅保证了重要构筑物不受到施工的影响,还能够达到技术、工期和环保要求,保证工程施工的经济效益,为其他类似工程提供了参考依据。

Based on the treatment engineering of poor foundation in seismic liquefaction zone of an expressway construction project,this article carried out the analysis and optimization comparison of antiliquefaction treatment plans for seismic liquefaction zones.Based on the importance of the structures along the expressway in liquefaction zone and the feasibility analysis of treatment plans,it selected three feasible plans from commonly used seismic liquefaction zone treatment plans,then,with economy,technological maturity,duration,and environmental protection as evaluation indicators,it used the analytic hierarchy process to optimize the selected solution.The results showed that the sand-gravel pile method obtained by the AHP method can effectively improve the unfavorable foundation of seismic liquefaction zone,which can not only guarantee that the important structures are not affected by the construction,but also can meet the technical,construction period and environmental protection requirements,and ensure the economic benefits of project construction,which can provide a reference for other similar projects.