高速铁路路基病害成因分析

高速铁路路基受列车荷载及自然条件的影响,易产生病害。根据我国已建高速铁路路基病害情况,分析了路基基床病害中翻浆冒泥、基床下沉、外挤等现象的形成机理;指出了目前高速铁路路堤边坡及路堑边坡在施工方法、防灾措施等方面存在的不足之处;剖析了造成路基过渡段不均匀沉降的主要因素,包括刚度差异、地基基础不良、压实质量不足、施工计划安排等方面,并提出预防及治理路基基床病害、边坡冲刷溜塌、过渡段不均匀沉降的基本原则及主要措施,这些对我国高速铁路路基病害原因分析及整治措施的制定具有一定参考和借鉴意义。

Analysis of Disease Causes of High-speed Railway Subgrade

Under the influence of train loading and natural conditions, high-speed railway subgrade is prone to subgrade disease. According to the characteristics of high-speed railway subgrade disease in China, this paper analyzes the formation mechanism of subgrade disease, including rising soil, subgrade subsidence, subgrade squeeze out and etc, and points out the disadvantages of the current construction method and disaster prevention measures in high speed railway embankment slope and cut slope. And it analyzes the main reasons of uneven subsidence at subgrade transitional sections, including stiffness difference, bad foundation, short of compaction quality, construction schedule, and etc. Furthermore, it puts for- ward the basic principles and major measures of prevention and treatment of subgrade diseases, slope slip down, uneven settlement of transition section. The research results of the study have a significant reference for China＇s high speed railway subgrade disease cause analysis and improvement measures.