浅谈高速铁路路基动态检测方法Evd.doc

浅谈高速铁路路基动态检测方法Evd 摘 要： 由于铁路的高速运输能力为我国的经济发展起到非常重要的促进作用，所以高速铁路逐渐成为了铁路建设的新贵。随着我国高速铁路、新线客专等高等级铁路建设的快速发展，方便了百姓的出行，同时对路基的质量标准提出了更高的要求。客运专线铁路路基压实质量是保持线路稳定与平顺、保证列车高速和安全运行的重要条件。所以科学、合理的监控测试方法是保证路基施工质量的重要措施。因此本文主要介绍客运专线路基检测方法Evd的检测方法、测试原理、测试仪器。Evd检测方法与以往路基的检测方法有所不同,是一种模拟铁路列车运行过程中对路基结构动态压力作用下，路基动态变形模量的检测方法，是目前国内的铁路客运专线新标准提出的必须要采用的检测方法。 关键词：高速铁路；路基；动态平板荷载Evd Abstract The high speed railway transport capacity has played a very important role in promoting Chinese economic development, so the high speed railway gradually becomes the new railway construction.With the rapid development of Chinese high speed railway and passenger dedicated railway constructing of high grade that they have a rapid development and making life convenient,while it puts forward higher requirements for the quality standard of subgrade. The roadbed compaction quality of passenger dedicated railway line is to maintain the stability and smoothness and to guarantee the safe operation of high-speed trains and an important condition to ensure safe operation.So scientific and reasonable monitoring test method is the important measure to ensure the quality of subgrade construction.So this article mainly introduces the passenger railway roadbed Evd testing methods, testing principle, testing equipment.Evd testing methods different with previous subgrade detection methods is a kind of simulation in the process of railway train operation for subgrade structure under the action of dynamic pressure and dynamic deformation modulus of subgrade detection method,.It is the detection method what must be employed proposed by the new standard of domestic railway passenger dedicated line. Keywords:high speed railway;subgrade;dynamic plate load Evd. 引言 路基的施工质量关系到整个工程的质量、进度和列车运行安全，而控制和检测压实质量的标准、方法和设备，则是保证压实质量的重要措施。在路基工程施工中，土体压实是一个最基本的问题，但仅用密实度指标来检测和判定路基的质量有其局限性。传统的强度及变形参数指标是通过静态平板荷载试验测得，即检测地基系数K30，而路基实际承受的荷载不仅有静荷载，还有列车运行时对路基产生的动荷载。尤其是高速铁路，动荷载产生的冲击力对路基的影响更为明显，即路基的稳定性和变形问题主要是由于动荷载引起的。动变形模量仪Evd通过模拟列车运行时产生的动应力及动应