英怀高速怀集北填平区综合处治方案比选研究

Comparative Study on Comprehensive Treatment Schemes for Filling Area at North of Huaiji in Yingde-Huaiji Expressway

摘要:

高速公路填平区的常规处治方案主要是通过截水、排水工程措施来避免填平区地表积水、减少填平区地表水下渗。但大型填平区若全部采用常规处治方案往往导致工程代价过高。为此，依托广东省英怀高速怀集北填平区综合处治工程，在多方案比选研究的基础上，提出了一种在大型填平区对侧边坡增设片石棱体多层反滤结构进行反压护道处理的新方案。该方案一方面可提高路堤稳定性，另一方面可防止路堤边坡因长期渗水而导致的流泥、管涌病害；同时，该方案造价低廉，便于施工，是一种不错的处治方案，可供今后类似项目借鉴参考。

Abstract:

Conventional treatment schemes for filling areas of expressways are mainly to avoid the surface water accumulation and reduce the surface water infiltration of the filling area through the water interception and drainage engineering measures. However, if the conventional treatment schemes are used for all the large-scale filling areas, the excessively high engineering costs are usually caused. Therefore, relying on the comprehensive treatment project for the filling area at the north of Huaiji in Yingde-Huaiji Expressway of Guangdong Province, on the basis of comparatively studying the multiple schemes, a new scheme is proposed to add a multi-layer reverse filtration structure of rubble prisms to the side slopes in large filling areas for the treatment of reverse pressure berms. This scheme can not only enhance the embankment stability, but also prevent the mud flow and pipe gushing diseases caused by long-term water seepage on the embankment slope. At the same time, the scheme features the low cost and convenient construction, and is an effective treatment, which can provide a reference for similar projects in the future.