Functionally gradient crash barrier and construction method thereof

Abstract

The invention discloses a functionally gradient crash barrier, and the crash barrier comprises a base, an energy dissipation layer and a UHPC panel, wherein the energy dissipation layer is arranged between the base and the UHPC panel. The invention further provides a construction method of the functionally gradient crash barrier. The construction method comprises the following steps: S1, prefabricating the reinforced concrete base, the UHPC panel and the energy dissipation layer, when the reinforced concrete base, the UHPC panel and the energy dissipation layer are prefabricated, pipelines forinstalling the energy dissipation connecting pieces are synchronously reserved; S2, installing the base on a bridge or a road; S3, installing an energy dissipation layer and a UHPC panel on the base,inserting the energy dissipation connecting pieces, and completing the construction of the functionally gradient crash barrier. The functionally gradient anti-collision guardrail has the advantages of being good in guidance quality, capable of reducing accident consequences, good in durability, low in manufacturing cost, short in construction period, easy and convenient to maintain and replace and the like, has a great use value and good economic benefits, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of auxiliary facilities for roads and bridges, and in particular relates to an anti-collision guardrail and a construction method thereof. Background technique [0002] Freeway traffic accidents are closely related to the geometric characteristics of the road and traffic ancillary facilities, and the guardrail on the freeway is an important factor affecting traffic safety. Statistics show that in road traffic accidents, traffic accidents occurring on expressways account for 55%, and 30% of them are vehicles contacting (collision, scratching, etc.) with expressway guardrails or directly driving out of the road. On October 28, 2018, a bus from the Second Yangtze River Bridge in Wanzhou District, Chongqing, broke through the bridge guardrail and fell into the Yangtze River, causing all 15 people on the bus to die or lose contact. On June 13, 2020, a tank truck exploded on the expressway in Wenling City, Zhejiang Provinc...

AI Technical Summary

Problems solved by technology

However, studies have shown that although the traditional reinforced concrete rigid guardrail has the advantage of strong impact resistance, it has the disadvantages of large impact force on the driver and passengers, and poor vehicle guidance, resulting in a large number of secondary collision accidents, casualties

Corresponding grades of steel structure guardrails have good energy consumption and better orientation than rigid concrete guardrails, but they have the disadvantages of high initial cost, easy failure due to steel corrosion problems, and high maintenance costs. Intrusion into the vehicle body, causing the danger of personal injury or death

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