汉江雅口航运枢纽泄水闸工程地基处理

汉江雅口航运枢纽工程泄水闸地基为不均匀的砂砾石土层,建基面局部为粉细砂薄层,砂砾石土层局部含有粉细砂透镜体或大块卵石。针对地基沉降量大和砂砾石土层分布不均匀的问题,提出了长螺旋钻孔压灌桩复合地基处理方案,并在现场代表性区域进行了成桩试验检测。结果表明:该地基处理方案技术可行、质量稳定、生态环保,适宜于本工程的应用,具有推广价值。

Foundation treatment for the release sluice of Yakou hydro-junction in Hanjiang River

The foundation of the release sluice of Yakou hydro-junction in Hanjiang River project is uneven sandy gravel soil.The foundation surface is partly a thin layer of fine sand,and the sandy gravel soil contains a fine sand lens or large pebble locally.In view of the problem of large settlement and uneven distribution of sandy and gravel soil,a treatment scheme for the composite foundation with long spiral drilling and grouting piles was proposed,furthermore the pile forming test was carried out in representative areas of the site.The results show that the foundation treatment scheme is feasible,stable in quality and environmentally friendly,suitable for the application of the project and valuable for popularization.