Performance of Recycled Ballast Stabilised with Geosynthetics
Performance of Recycled Ballast Stabilised with Geosynthetics
复制标题
用土工合成材料稳定的再生道碴的性能
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
D. Christie
中科院分区：
文献类型：
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作者：
B. Indraratna;Wadud Salim;D. Christie
在常规轨道维护方案中，通常用新道碴替换劣化和污染的道碴，这使得维护操作成本高。为了降低道碴维护成本，可以将废弃道碴清理、筛分，并在轨道中重新使用。然而，再生道碴在轨道交通荷载作用下的沉降和侧向变形通常过大，考虑到轨道的安全性和稳定性、乘客的舒适性以及任何列车脱轨的后果，这是不能容忍的。本文研究了通过在道碴/覆盖层界面处插入土工合成材料加固再生道碴层的稳定性和性能。模拟现场荷载和边界条件进行了室内模型试验。循环三轴试验进行了新鲜和再生道碴与土工合成材料加固包。这些研究成果为轨道下部结构的建设和维护提供了新的思路。
In a routine track maintenance scheme, the degraded and fouled ballast is usually replaced by fresh ballast, which makes the maintenance operation costly. In order to reduce ballast maintenance cost, the waste ballast may be cleaned and sieved, and re-used in the track. However, the settlement and lateral deformation of recycled ballast under rail traffic loading are generally excessive, which cannot be tolerated considering the safety and stability of track, passenger comfort and the consequences of any train derailment. This paper investigates the stabilisation and performance of recycled ballast bed by inserting geosynthetic reinforcement at the ballast/capping interface. Laboratory model tests were conducted simulating the field load and boundary conditions. Cyclic triaxial tests were carried out on fresh and recycled ballast with and without geosynthetic reinforcement inclusion. These research findings shed further light on the way of cost-effective track sub-structure construction and maintenance.