摘要
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。
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.
引文
[1]李海鸥,尹久健,杜心武,等.汉江雅口航运枢纽工程初步设计阶段工程地质勘察报告[R].长沙:湖南省水利水电勘测设计研究总院,2016.
[2]彭映凡,瞿月平,孙保虎,等.汉江雅口航运枢纽工程初步设计报告[R].长沙:湖南省水利水电勘测设计研究总院,2016.
[3]江苏省水利勘测设计研究院有限公司.水闸设计规范:SL 265—2016[S].北京:中国水利水电出版社,2016.
[4]刘砚鹏,郑悦,邵昌浩,等.长螺旋钻孔压灌桩在水运工程中的应用[J].水运工程,2017(S1):61-64.
[5]浙江省住房和城乡建设厅.复合地基技术规范:GB/T50783—2012[S].北京:中国计划出版社,2012.
[6]中国建筑科学研究院.建筑地基基础设计规范:GB50007—2011[S].北京:中国建筑工业出版社,2011.
[7]中国建筑科学研究院.建筑地基处理技术规范:JGJ79—2012[S].北京:中国建筑工业出版社,2012.