土基对波形护栏安全性能的影响

Influence of soil foundation on the safety performance of wave guardrail

针对目前城市、公路桥梁在路边护栏的实际施工过程中,普遍存在地基土压实度不能达到规范要求的90%的压实度从而导致护栏强度立柱承载力过低的问题,以地基压实土和回填土为研究对象,分析了两种土基在遭受车辆碰撞的时候受力特性,探讨了土基对于波形梁护栏在遭受车辆碰撞时安全性能是否满足规范要求的问题,给出了加固建议。研究发现:在土基压实度达不到规范规定的90%的情况下,波形护栏安全性能达不到规范要求,在采用加固措施后,能满足规范要求。

In view of the actual construction process of urban and highway bridges in the roadside guardrails,it is generally found that the compaction degree of the foundation soil cannot meet the 90% compaction degree required by the specification,which leads to the problem that the bearing capacity of the guardrail column is too low,and the foundation compaction soil and backfill are the research objects. The stress characteristics of the two soil foundations in the event of vehicle collision are analyzed. The problem of soil foundation for the safety performance of corrugated beam guardrail in the event of vehicle collision is discussed. Suggest. The study found that the safety performance of the wave guardrail can not meet the specification requirements when the soil compaction degree does not reach 90% of the specification. After the reinforcement measures are adopted,the specification can be met.