“桥改路”方案在FAST工程中的应用

Application of the Bridge Changing to Road Schemes in FAST Program

FAST工程环形检修道路在5H崩塌槽堆积体处拟通过桥梁方案跨越,但其施工工期长、造价高,对桥梁基础持力层的要求也高。鉴于此,各方在通过详细勘察、专项论证之后,提出了"桥改路"方案,即通过路基形式穿越崩塌堆积体,并对路基进行安全防护。实践证明该方案可行、经济、安全、有效,成功达到了节省工期和造价的目的。"桥改路"方案的成功表明:只要经过合理的勘察设计施工,利用路基形式穿越崩塌堆积体是可行的。这也对类似条件下的工程提供了一定的参考和借鉴。

Bridge scheme is to be adopted across the accumulation formed after collapse five hours in the FAST project, but this scheme has a long construction duration, high in cost and requires high bearing capacity of bridge foundation. In this regard after detailed investigation and special argument, the program of changing bridge to road solution is proposed. Road scheme is used to cross the collapsed and accumulated section, and the embankment is protected. It has been proved that the program is feasible, cost-effective, reliable and in good efficiency, and both construction duration and cost are reduced. This case also proves that after reasonable investigation, design and construction, crossing collapsed and accumulated section by road is possible. It also provides some references for similar project.