高速铁路软土路基纠偏整治探索

软土地区的高速铁路受施工、堆载等外部因素的影响,路基和桥墩可能发生位移,这不仅威胁高速铁路行车安全,而且要纠正这种位移(纠偏)十分困难。现以某高速铁路K45路基发生横向位移整治工程为例,分析产生路基偏移的原因,研究探索影响纠偏的各个因素,通过6次整治方案的调整,实现了路基的纠偏。最后提出高压旋喷桩进行纠偏整治的关键要点,为软土地区桥梁桩基纠偏提供了思路。

Study on Inclination Correction of Soft-soil Subgrade of High-speed Railway

In soft soil areas,the high-speed railways are likely to be affected by construction,loads and other external factors,with the result that there may be displacements at the railway subgrade or bridge piers. Those displacements will pose a threat to the safety of trains running on high-speed railway,and even worse,it is very difficult to correct those displacements( inclinations). Based on a case in relation to the correction of the transverse displacement of subgrade of section K45 of a high-speed railway,this paper analyzed the reason of subgrade inclination,and researched the relevant factors which affect the correction of subgrade inclination. As a result,after six times of adjustments on inclination correction scheme,the subgrade inclination was corrected successfully. Finally,this paper proposed the key points of high-pressure chemical churning piles used in inclination correction,providing a way for inclination correction of bridge pile-foundations in soft soil areas.