填土层低能级强夯试验收锤击数和夯击间隔时间探讨  

DISCUSSION ON THE NUMBER OF HAMMERS AND THE INTERVAL OF TAMPING IN THE LOW-ENERGY DYNAMIC COMPACTION TEST OF THE FILL SOIL

作　　者：黄清祥 HUANG Qingxiang(China Jing Ye Construction Engineering Contracting Co.,Ltd.,Xiamen branch,Fujian Xiamen 361009,China)

机构地区：[1]中国京冶工程技术有限公司厦门分公司,福建厦门361009

出　　处：《低温建筑技术》2022年第2期150-154,共5页Low Temperature Architecture Technology

摘　　要：文中以填土层中低能级强夯试验为例,通过分析施工参数及试验结果,探讨确定强夯收锤击数方法和超静孔隙水压力消散规律。结果主要表明,从统计学和宏观角度出发,夯点最后两击沉降量平均值Si调整±2cm,用占比90%以上的双控制方法确定强夯收锤击数满足工程要求;强夯有效加固影响深度内土体产生的超静孔隙水压力Umax是影响深度以下土层的10倍;同一土层超静孔隙水压力消散速率与距离强夯位置没有关系。In this paper,the method to determine the hammer number of dynamic compaction and the dissipation law of excess pore water pressure are discussed by analyzing the construction parameters and test results.The results show that from the statistical and macroscopic point of view,the average si of the last two sinking drops is adjusted±2 cm,and the double control method with a proportion of more than 90%is used to determine the hammer number of dynamic compaction to meet the engineering requirements.The excess pore water pressure(Umax)produced by dynamic compaction is 10 times that of the soil layer below the affected depth.The dissipation rate of excess pore water pressure in the same soil layer has no relation with the distance from the dynamic compaction position.

关 键 词：地基处理 强夯法 强夯收锤击数 超静孔隙水压力消散 

分 类 号：TU41[建筑科学—岩土工程]