文献类型：期刊文献

中文题名：浅层地基冲击碾压有效加固深度预估研究

英文题名：On Prediction of Effective Improvement Depth of Rolling Dynamic Compaction on Shallow Ground

作者：陈忠清[1,2];卢文良[1];黄曼[1,2];NJOKU Ogechi Aduramomi[1];程鸿波[3]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]浙江省岩石力学与地质灾害重点实验室,浙江绍兴312000;[3]力试(上海)科学仪器有限公司,上海201500

年份：2019

卷号：39

期号：9

起止页码：1

中文期刊名：绍兴文理学院学报

收录：国家哲学社会科学学术期刊数据库

基金：国家自然科学基金项目“基于纳观分析的水泥石徐变机理及调控模型研究”(51602198);浙江省公益技术应用研究计划项目“基于次声技术的浙江地区岩质滑坡灾害监测预警关键技术研究”(2016C33052);绍兴市公益技术应用研究计划项目“冲击碾压技术加固绍兴地区浅层软土地基的应用研究”(2015B70034;2015B70035)

语种：中文

中文关键词：地基处理;冲击碾压法;有效加固深度;预估;冲击能量

外文关键词：ground improvement;rolling dynamic compaction(RDC)method;the effective depth of improvement;prediction;impact energy

中文摘要：如何预估冲击碾压法的有效加固深度是当前冲击碾压法设计中尚未得到解决的焦点问题之一.通过冲击碾压过程中冲击轮的运动分析和能量分析,提出浅层地基冲击碾压有效加固深度的经验预估公式.研究结果表明:单次冲击作用的能量主要由非圆形冲击轮的重力势能和转动动能组成,且二者的能量比主要与冲击轮形状及牵引速度有关;浅层地基冲击碾压有效加固深度经验预估公式可表示为D=α[(1+n)Wh]0.5,其中湿陷性黄土的经验系数α为0.7~0.8,浅层粉土及粉细砂得到显著压实的经验系数为1.2~2.1.

外文摘要：How to estimate the effective improvement depth of rolling dynamic compaction(RDC)method is one of the key problems that have not been solved in the current design of the RDC method.The rolling process of impact module and energy of single impact during the RDC process were analyzed,and finally an empirical equation for predicting the effective improvement depth of the RDC on shallow ground was proposed.The results show as follows:(1)the impact energy is mainly composed of the gravitational potential energy and the rotational kinetic energy of the non-circular impact module,and the energy ratio of these two kinds of energy is mainly related to the shape of impact module and working speed;(2)a proposed empirical equation for predicting the effective improvement depth of the RDC on shallow ground would be D=α[(1+n)Wh]0.5,and the empirical coefficientαfor collapsible loess could be 0.7~0.8,and for loose silt as well as silty sand could be 1.2-2.1.