某型强夯机单抽施工法夯击能效率实验研究  

Experimental study on compaction energy efficiency of single-rope construction method for a dynamic compactor

作　　者：张俊强 杨帆 汤迎红[2] 米承继[2] 吕震泽 ZHANG Junqiang;YANG Fan;TANG Yinghong;MI Chengji;LV Zhenze(Hunan Bobang Heavy Industry Co.,Ltd.,Changde 410600,Hunan,China;College of Mechanical Engineering,Hunan University of Technology,Zhuzhou 412007,Hunan,China)

机构地区：[1]湖南博邦重工有限公司,湖南常德410600 [2]湖南工业大学机械工程学院,湖南株洲412007

出　　处：《地基处理》2024年第4期319-327,共9页Journal of Ground Improvement

摘　　要：针对某型强夯机快速动态冲击过程中能量损失理论计算不精准、接触式测量方法有偏差等技术瓶颈,本文开展了基于非接触式方法测试某型强夯机单抽施工法的夯击能效率实验研究。实验使用美国Phantom Miro M310高速摄影机,采用非接触式动态测量方式,对非脱钩施工(单抽施工)与脱钩施工两种工作状态进行数据采集。通过分析计算出夯锤撞击地面动态过程中的瞬时速度响应,对比了脱钩与非脱钩工况时3种不同质量的夯锤在3种不同高度下的能量损耗率。考虑到实验时夯锤在同一位置落锤两次,高速摄像机无法测出第二锤的真实夯击面,故通过有限元的方法对工况进行模拟仿真,对夯锤瞬时落地速度进行修正。实验结果表明:相同质量下,能量损耗率随夯锤提升高度的增加而降低;相同高度下,能量损耗率随夯锤质量的增加而降低;单抽施工法的能量损耗率可以控制在8%以内。本文为强夯机夯击能效率的精准测试提供了技术依据,为降低单抽施工法能效损耗提供了思路,同时也为今后同类重工机械的使用与改进设计积累了经验数据。Aiming at the technical bottlenecks such as the inaccurate theoretical calculation of the energy loss in the rapid dynamic impact process and the deviation of the contact measurement method,this study conducted experimental research on the compaction energy efficiency of single-rope construction method of a certain type of dynamic compactor based on the non-contact method.The experiment employed the American Phantom Miro M310 high-speed camera for non-contact dynamic measurement,collecting data under two working conditions:non-decoupling construction(single-rope construction) and decoupling construction.By analyzing the instantaneous velocity of the hammer,the energy loss rates of three different hammer weights at three different heights were compared under decoupling and non-decoupling conditions.Considering that the hammer fell twice in the same position in the experiment,the high-speed camera could not measure the real tamping surface of the second hammer,the working condition was simulated by the finite element method,and the instantaneous landing speed of the hammer was corrected.The experimental results show that under the same mass,the energy loss rate decreases with the increase of the height of the hammer.At the same height,the energy loss rate decreases with the increase of hammer mass.The energy loss rate of single-rope method can be controlled within 8%.This paper provides technical basis for accurate test of the compaction energy efficiency of dynamic compactor,offers insights for reducing the energy loss of single-rope construction method,and also accumulates empirical data for the use and improvement design of similar heavy machinery in the future.

关 键 词：强夯机 夯击能 单抽施工法 能量损耗率 非接触式测量 

分 类 号：TU662[建筑科学—建筑技术科学]