• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Advances in geotechnical engineering >Use of Geosynthetics in Railways including Geocomposites and Vertical Drains
【24h】

Use of Geosynthetics in Railways including Geocomposites and Vertical Drains

机译：土工合成材料在包括土工复合材料和垂直排水管道的铁路中的使用

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Australia relies heavily on rail for the transportation of bulk commodities andpassenger services, and has introduced faster and heavier trains in recent years due to agrowing demand. Large cyclic loading from heavy haul and passenger trains oftenleads to progressive deterioration of the track. The excessive deformations anddegradations of the ballast layer and unacceptable differential settlement or pumpingof underlying soft and compressible subgrade soils necessitate frequent costly trackmaintenance works. A proper understanding of load transfer mechanisms and theireffects on track deformations are essential prerequisites for minimising maintenancecosts. The reinforcement of the track by means of geosynthetics leads to significantreduction in the downward propagation of stresses and assures more resilient longtermperformance. The geocomposite serves the functions of reinforcement, drainageand separation, thereby reducing the vertical and lateral deformations. Stabilization ofsoft subgrade soils by using prefabricated vertical drains (PVDs) is also essential forimproving the overall stability of track and to reduce the differential settlement duringthe operation of trains. The effectiveness of using geocomposite geosynthetic andPVDs has been observed through field measurements and finite element analyses.These have been the first fully instrumented, comprehensive field trials carried out inAustralian Railways, and it was very encouraging to see the field observationsmatching the numerical predictions.
机译：澳大利亚严重依赖铁路运输大宗商品和 客运服务，并且由于近年来 不断增长的需求。重载和旅客列车经常产生较大的周期性载荷 导致轨道逐渐恶化。过度变形和 压载层的劣化和不可接受的差异沉降或泵送 底层软性和可压缩路基土壤需要经常进行昂贵的跟踪 维修工程。对负载传递机制及其正确理解 对轨道变形的影响是最小化维护的必要先决条件 费用。借助土工合成材料对轨道进行加固可以显着提高 减少应力的向下传播，并确保长期具有更大的弹性 表现。土工复合材料具有加固，排水的功能 和分离，从而减少了垂直和横向变形。稳定 对于预制的垂直排水沟（PVD），软土路基也必不可少。 改善轨道的整体稳定性并减少行驶过程中的差异沉降 火车的运作。使用土工合成材料和土工合成材料的有效性 通过现场测量和有限元分析已经观察到了PVD。 这是在美国进行的首个完全仪器化的，全面的现场试验 澳大利亚铁路，看到实地观察非常令人鼓舞 匹配数值预测。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号