高速铁路路基填料智能振动压实系统研制与试验研究  

Development and Experimental Study of Intelligent Vibratory Compaction System for High-speed Railway Subgrade Fillers

作　　者：谢康 陈晓斌[1] 肖宪普 李泰灃 张千里 尧俊凯 XIE Kang;CHEN Xiaobin;XIAO Xianpu;LI Taifeng;ZHANG Qianli;YAO Junkai(School of Civil Engineering,Central South University,Changsha 410075,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081 [3]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《铁道学报》2024年第6期138-147,共10页Journal of the China Railway Society

基　　金：国家自然科学基金(51978674);中国铁道科学研究院集团有限公司科研项目(2023QT002);中国铁路设计集团有限公司科技开发课题(2020YY240606)。

摘　　要：针对现有振动压实设备的局限性,研制一种振动参数调节广、能够实时监测填料干密度的室内智能振动压实设备,并进一步量化评估填料压实状态动刚度和强度的新指标。基于振动理论,揭示室内振动压实设备稳定工作机制,提出振动参数动态优化方法,基于表面沉降理论提出干密度实时计算方法,结合压密曲线建立压实性能评估方法,分别从滞后角修正刚度理论和相似修正强度理论,提出刚度和强度等力学指标对压实状态进行综合评估方法;研发室内振动压实系统以及数据采集分析软件,分析系统部件的工作性能和指标的测试计算方法;最后,开展室内振动压实试验。研究结果发现,增大容器直径和设备自重可显著提高填料干密度;当系统处于共振频率下,填料动刚度减小,承载能力增大;基于振动参数动态优化方法,能够有效减少30%振动能量输出,进一步提高压实效率,减少压实器械磨损及颗粒破碎。研究成果有助于加深对振动压实成型机理的分析,为振动压实试验方法在高速铁路路基建设中推广应用提供理论基础。To address the limitations of existing vibratory compaction equipment,a large-scale indoor intelligent vibratory compaction equipment with a wide adjustment range of vibration parameters and real-time monitoring of dry density of fillers was developed to further quantify the new indicators of dynamic stiffness and strength for evaluating the compaction state of fillers.Firstly,the stable working mechanism of indoor vibratory compaction equipment was revealed based on vibration theory,meanwhile,a dynamic optimization method of vibration parameters was proposed.With the real-time calculation method for dry density being proposed based on surface settlement theory,a compaction performance evaluation method was formed by the compaction curve.According to the modified stiffness theory of lag angle and the similar modified strength theory,a comprehensive evaluation method of compaction state was proposed by the mechanical indicators of stiffness and strength.Secondly,the indoor vibration compaction system and data collection and analysis software were introduced to analyze the working performance of the system components and the test calculation method for the evaluation indicators.Finally,the experimental vibration compaction test was carried out to verify the reliability of the equipment.The results show that increasing the diameter of the container and the dead weight of the equipment can significantly improve the dry density of the fillers.When the equipment is at the resonance frequency,the stiffness of the fillers decreases,with increasing bearing capacity.Based on the dynamic optimization method of vibration parameters,the vibration energy output can be reduced by 30%,with further improvement of the compaction efficiency,and reduction of the wear of compaction equipment and particle breakage.The research results help to deepen the analysis of the vibration compaction forming mechanism and provide a basis for the extensive application of the vibration compaction test method in the construction of high-speed railw

关 键 词：高速铁路路基 振动压实 振动理论 参数优化 表面沉降法 压实状态 

分 类 号：U215[交通运输工程—道路与铁道工程]