Deformation properties of decomposed peat under vibration and dynamic load impact

被引：1
|
作者：
Kolos, A. F. [1 ]
Ryzhov, V. S. [1 ]
Shmulevich, M., I [2 ]
Akkerman, G. L. [3 ]
机构：
[1] Emperor Alexander I St Petersburg State Transport, 9 Moskovsky Pr, St Petersburg 190031, Russia
[2] PROMTRANSNIIPROEKT, Vernadskogo Prospekt,29, Moscow 119331, Russia
[3] Ural State Univ Railway Transport, Kolmagorova 66, Ekaterinburg, Russia
来源：
PROCEEDINGS OF THE INTERNATIONAL SCIENTIFIC CONFERENCE TRANSPORTATION GEOTECHNICS AND GEOECOLOGY (TGG-2017) | 2017年 / 189卷
关键词：
subgrade; weave; embankment; roadbed; peat; amplitude; acceleration; deformation; vibrodynamic; stabilometer;
D O I：
10.1016/j.proeng.2017.05.123
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Deformation of embankments built on marshy territories is mainly displayed by slowly increasing residual settlements and significant elastic settlements. These cause intensive wear of fastening elements and prove the definitive role of peat used as foundation material in the reliable performance of railway track in general. Investigation of peat physical and deformation characteristics were conducted on samples having undisturbed structure. The result of experiments were obtained the following dependencies: E(W) - dependence of aggregate deformation modulus on natural moisture level; E(rho(d)) - dependence of aggregate deformation modulus on porosity. Analysis of the obtained data allows to draw a conclusion, that peat porosity growth at low values of moisture leads to significant reduction of deformation modulus. It is also worth mentioning that the impact of vibration and dynamic loading increases this reduction even further. The described findings emphasize the importance of taking into consideration vibration and dynamic loads when calculating settlements in railway embankments built on peat foundations. (C) 2017 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：792 / 799
页数：8
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