车辆动荷载对基坑围护结构的影响分析及建议

Influence analysis of vehicle dynamic load on foundation pit enclosure and suggestion

摘要:

车辆动荷载处于基坑周边时，现行行业安全规范将其归纳为一般危险源。杭州某基坑围护因发生局部坍塌，使邻近道路塌陷，调查认为车辆动荷载是事故的主要原因。文中结合该案例，通过对事故原因的分析，并对照现行标准规范，探讨车辆动荷载对基坑围护结构的影响规律。提议将车辆动荷载提升为重大危险源，从跨行业研究、提高基坑外限载、完善基坑监控以及现场管控等方面着手解决问题。同时建议将车辆动荷载列为研究对象，找出力学模型，归纳出影响规律，给出针对性措施，补充完善到现行标准规范中。

Abstract:

When vehicle dynamic load is around the foundation pit， it is classified as the general hazard source by the current industry safety standard. The partial collapse of a foundation pit in Hangzhou led to the collapse of the adjacent road， and investigation found that the vehicle dynamic load was the cause of the accident. In reference to the accident， this paper discusses the influence law of vehicle dynamic load on the foundation pit enclosure structure through analysis of the cause and comparison with the current standard code. It is proposed to raise vehicle dynamic load as a major hazard source， and solve the problems from the aspects of cross-industry research， increasing the external load limit of the foundation pit， improving foundation pit monitoring and on-site control. At the same time， it is suggested to take vehicle dynamic load as the research subject to find out the mechanical model， summarize the influence law， give targeted measures， and add them to the current standard and specification.