陆域与海域深厚碎石回填地基高能级强夯有效加固深度对比试验研究

发布时间：2018-04-04 01:06

本文选题：高能级强夯　切入点：地基处理　出处：《中南大学学报(自然科学版)》2017年07期

【摘要】：以广东某石油仓储工程高能级强夯法地基处理为背景,采用平板载荷试验、动力触探试验、标准贯入试验、瑞利波试验及室内土工试验相结合的方法,研究陆域与海域深厚碎石回填地基15 000 k N·m高能级强夯下的有效加固深度。研究结果表明:陆域强夯区的有效加固深度不小于10.0 m,海域强夯区的有效加固深度不小于8.0 m;陆域回填区与海域回填区夯点与夯间处强夯加固效果没有显著差别,说明试验设计参数合理,场地经15 000 k N·m能级强夯处理后地基的均匀性较好,强夯影响深度超过20.0 m,消除了20.0 m深度范围内粉砂层的液化,但对于深厚填土覆盖下淤泥质粉质黏土层的影响不大。在本试验条件下,对于深厚的碎石土杂填土地基,建议采用Menard公式确定有效加固深度时的修正系数α介于0.21~0.26之间。
[Abstract]:Based on the foundation treatment of high energy dynamic compaction method of a certain oil storage project in Guangdong province, the method of combining plate load test, dynamic penetration test, standard penetration test, Rayleigh wave test and indoor geotechnical test is adopted.The effective reinforcement depth of deep gravel backfill foundation in land and sea area under high energy dynamic compaction of 15 000 kN m is studied.The results show that the effective depth of dynamic consolidation is not less than 10.0 m in the land area and 8.0 m in the sea area, and there is no significant difference between the consolidation point and the tamping point of the land area and the sea area.The results show that the design parameters are reasonable, the ground uniformity is better after dynamic tamping treatment with 15000 km energy level, the influence depth of dynamic compaction is more than 20.0 m, and the liquefaction of silt layer is eliminated in the range of 20.0 m.But it has little effect on silt clay layer under deep fill.Under the condition of this test, it is suggested that the correction coefficient 伪 when determining the effective reinforcement depth by using Menard formula is between 0.21 and 0.26 for the deep gravel mixed fill foundation.
【作者单位】：青岛大学环境科学与工程学院;海洋环境与生态教育部重点实验室;青岛理工大学土木工程学院;中化岩土工程股份有限公司;青岛鼎林置业有限公司;
【基金】：上海市科学技术委员会上海市科技启明星跟踪类项目(13QH1400400) 上海现代建筑设计集团研究项目(J01Be-011-1005-0029)~~
【分类号】：TU41;TU753.8

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