铁路多级加筋土挡墙研究现状及应用展望

Current Situation and Application Prospect of Multi-stage Reinforced Soil Wall for Railway

文章从破坏形式、设计理论、筋带及面板选择、施工技术等方面系统阐述了多级加筋土挡墙的研究现状,认为现有研究成果大多为高度较低的单级墙,少量的多级台阶式加筋土挡墙的研究未充分考虑铁路荷载特征,尚不能较好满足我国铁路对加筋土挡墙高度不断增大的要求。基于与公路荷载相比,铁路荷载具有动载性更强、荷载更集中、荷载更大、荷载重复周期性更强的特点,提出应重点研究多级加筋土挡墙在铁路荷载下的应力响应、变形特点、耐久性等。因铁路对加筋土挡墙的沉降控制要求更严,因此考虑铁路荷载特征下的多级加筋土挡墙(特别是高速铁路多级加筋土挡墙)变形特征及应力分布的研究具有较强的理论和现实意义。

The current research status of a multi-stage reinforced soil wall is analyzed including its failure modes, design theories, reinforcement strip and panel choosing and construction technique, etc. Most of the present results are focusing on single-stage walls with a low height. A small number of researches concerned multi-stage reinforcement soil walls however without the enough consideration of the characteristics of railway loading cannot meet the requirement of increasing demands for reinforcement soil wall height of high-speed railway in China. Basing on the difference between railway load and road load,railway load has characteristics such as stronger dynamic load,concentration and periodicity, the suggestions are put forward that the stress response, deformation, and durability of multi-stage reinforced soil walls under the railway load should be mainly studied. The research of deformation behaviour and stress distribution of multi-stage reinforced soil walls especially under high-speed railway load bearing characteristics has theoretical and practical significance.