钙质砂地基含水率对爆破振动特性影响分析  

Analysis of Influence of Moisture Content of Calcareous Sand Foundation on Blasting Vibration Characteristics

作　　者：钟冬望[1,2] 杜泉 孟庆山 雷学文[1] 何理[1,2] 司剑峰[1,2] 伍岳 ZHONG Dong-wang;DU Quan;MENG Qing-shan;LEI Xue-wen;HE Li;SI Jian-feng;WU Yue(Wuhan University of Science and Technology,Wuhan 430065,China;Hubei Province Intelligent Blasting Engineering Technology Research Center,Wuhan 430065,China;State Key Laboratory of Rock and Soil Mechanics and Engineering,Wuhan Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]武汉科技大学,武汉430065 [2]湖北省智能爆破工程技术研究中心,武汉430065 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071

出　　处：《爆破》2020年第4期31-35,74,共6页Blasting

基　　金：国家自然科学基金项目(51574184,51404175);湖北省教育厅科学技术研究项目(Q20181109);冶金工业过程系统科学湖北省重点实验室开放基金项目(Y201717)。

摘　　要：含水率对钙质砂地基爆破振动特性的影响研究,是岛礁建设工程急需解决的问题。基于小波包变换技术分析了试验中3种含水状态钙质砂地基的能量衰减规律。研究表明:同一药量情况,同一测点情况下钙质砂地基中含水率高的质点振动速度较含水率低的大。质点爆破振动的能量衰减速率均随着爆心距的增加而逐渐趋缓,饱和钙质砂地基大于湿钙质砂地基大于干钙质砂地基。同时比较了3种含水状态的钙质砂地基质点的径向、切向、垂向的振动速度峰值,得出了3种含水状态的钙质砂地基的萨道夫斯基计算公式,拟合优度较好,对岛礁工程建设和试验研究具有参考价值。The influence of moisture content on the vibration characteristics in calcareous sand foundation is an urgent problem to be solved in the construction projects of islands and reefs.Based on the wavelet packet transform technology,the energy decay laws of three kinds of water-bearing calcareous sandy ground in the experiment were analyzed in this article.Studies have shown that the vibration particle velocity with high water content in calcareous sand foundation is greater than that with low water content with the same charge amount and the same measuring point.The of particle vibration gradually slowed down with the increase of the distance to blast center.This energy attenuation rate is the largest for the saturated calcareous sand foundation,second largest for the wet calcareous sand foundation,and then the least for the calcareous dry sand foundation.At the same time,the radial,tangential,and vertical peak particle vibration velocities of the three types of water-bearing calcareous sandy foundation were compared,and the K values,α values of the Sadofsky formula were obtained with a good fitting goodness.This study has reference value for island reef engineering construction and related experimental research.

关 键 词：钙质砂 振动速度 萨道夫斯基公式 含水状态 小波包能量分析 

分 类 号：TU435[建筑科学—岩土工程] TU413.6[建筑科学—土工工程]