冲击碾压处理滨海粉细砂地基试验研究

发布时间：2018-02-26 17:16

本文关键词： 粉细砂地基冲击碾压法施工工艺监测数据原位测试　出处：《同济大学学报(自然科学版)》2014年02期 　论文类型：期刊论文

【摘要】：依托海南省某滨海旅游公路,利用标准贯入试验、重型动力触探试验等原位测试和压实度、弯沉等检测结果,以及地下水位、孔隙水压力和地表沉降等实时监测数据,对滨海粉细砂地基进行冲击碾压的试验研究,探讨冲击碾压处理滨海粉细砂地基的有效性以及合理的施工工艺.研究结果表明,采用冲击碾压有效处理粉细砂地基的关键在于以浅层饱和粉细砂地基中超静孔隙水压力消散率至少达到70%作为实施下一轮次冲碾的控制标准.合理的施工工艺不仅能有效提高粉细砂地基强度,而且可消除浅层粉细砂地基的液化.冲击碾压后,2m深度范围内粉细砂地基土的压实效果显著.
[Abstract]:Relying on the results of in-situ testing and compaction, deflection, and other real-time monitoring data, such as standard penetration test, heavy-duty dynamic penetration test, etc., on a coastal tourist road in Hainan Province, as well as real-time monitoring data such as groundwater level, pore water pressure and surface subsidence. In this paper, an experimental study on impact compaction of silty sand foundation in coastal area is carried out, and the effectiveness and reasonable construction technology of treating silt foundation with impact compaction are discussed. The results show that, The key to the effective treatment of fine silt foundation by impact compaction lies in that the dissipation rate of excess pore water pressure in shallow saturated silty sand foundation is at least 70% as the control standard for the next round of flushing and rolling. The reasonable construction technology is not reasonable. It can only effectively increase the strength of silty sand foundation. And the liquefaction of shallow silty sand foundation can be eliminated. The compaction effect of silty sand foundation soil is remarkable in the depth of 2 m after impact compaction.
【作者单位】：同济大学道路与交通工程教育部重点实验室;海南省公路勘察设计院;
【基金】：海南省交通科技项目(JT20120898010)
【分类号】：U416.1

【参考文献】