Experimental Research on Concrete Guardrail with Anchorage Rebar for Low Degree Highway

Abstract

Until the end of 2017, there are 4151.3 thousands kilometers highway below degree three in our country, which accounting for 86.97% of the country's total mileage. Because of the lack of funds for construction and maintenance, the safety protection facilities on low degree highway are seriously insufficient, which affects the safety level badly. For the purpose of reducing costs, satisfying the roadside safety requirements for low degree highway, the methods of finite element simulation analysis and real vehicle impact tests are used to develop a kind of anchor bar type concrete guardrail. By setting anchor bar in highway shoulder, the foundation of guardrail is tied tightly with shoulder, which makes them bearing external force jointly, accordingly, the protection ability and foundation stability of concrete guardrail is enhanced. According to the full-scale impact test results, the anchor bar type concrete guardrail can reach C level (40kJ), the whole guardrail structure did not damage impacted by vehicles, which helps to decrease the maintenance workload after crash. The guardrail can reduce the accident rate and severity on low degree highway.