Research on Strengthening Scheme for Class-A W-beam Guardrail in Guangzhou-Qingyuan Expressway
In order to improve the safety protection performance of the guardrail in the continuous S bend of Guangzhou-Qingyuan Expressway,based on the new 3 mm three-wave Class-A W-beam guardrail through the crash test,a guardrail strengthening scheme is proposed,and a high-precision computer simulation model is established to analyze the ultimate protection capability of the strengthening scheme and the safety protection capability of different foundation guardrails.The results show that compared with the original guardrail,the protective capability of the guardrail strengthening scheme on the bus is improved by 64.3％from 140 kJ to 230 kJ,and the protective capability of the guardrail on the truck is improved by 108％from 125 kJ to 260 kJ.At the same time,the four kinds of guardrail foundation embedment methods recommended by the code all meet the evaluation standard requirements.The research results can effectively improve the safe operation level of dangerous road sections and have been applied in practical projects.
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