排水管改迁对既有堤防安全影响及保护措施刍探

The Influence of Drainage Pipe Relocation Construction on the Safety of Existing Embankment and Protective Measures

管线在堤防安全影响范围内,基坑及排水管施工对堤围的影响是工程关键考虑因素之一。为此,以堤防影响范围内管网改迁施工工程为例,从堤防安全控制标准出发建立数值模型,分析堤围外基坑及排水管施工对既有堤防安全影响及保护措施。结果表明,基坑施工对堤防具有显著的水平卸荷作用,能引起堤防支挡结构岩土体应力场及位移场改变,从而引发堤防结构的水平位移。只有采取科学工艺和合理措施,才能确保施工期堤防安全。应对措施可为类似工程优化设计和施工提供参考。

Based on the project background of pipe network relocation within the scope of embankment influence,this paper analyzes the impact of foundation pit and drainage pipe construction outside the embankment on the safety of existing embankment and protective measures.The pipeline is within the distance of embankment safety impact,and the impact of foundation pit and drainage pipe construction on the pipeline has become one of the keys of the project.Therefore,based on the dike safety control standard and the establishment of a numerical model,the influence of excavation and reinforcement of foundation pit on the dike is analyzed.The results show that the foundation pit construction has a significant horizontal unloading effect on the dike,which inevitably leads to the change of the rock and soil stress field and displacement field of the dike retaining structure and the horizontal displacement of the dike structure.However,the safety of the dike during construction can be guaranteed by adopting reasonable reinforcement measures.The results of this paper can provide some reference for the optimization design and construction engineering of similar projects.