漳泉铁路K56路肩挡墙病害原因分析及综合治理

介绍漳泉铁路K56路肩挡墙病害情况,对挡墙的外倾变形原因进行分析,采用通用极限平衡法进行边坡稳定数值分析,计算搜索出最不利的滑面(即破裂面);采用库仑理论计算作用于挡墙上的主动土压力,并对挡墙病害进行检算。通过经济适用性、施工优越性、对既有路基的影响等方面综合对比,确定采用既有路肩墙墙体注浆+肋柱整板式锚索墙加固方案,对既有路肩墙病害进行综合治理,有效地解决了在一些客观条件受限情况下既有路肩墙变形病害问题。

Reason Analysis and Comprehensive Treatment of Subgrade Shoulder Retaining Wall Disease at K56 Section of Zhangzhou-Quanzhou Railway

This paper introduced the subgrade shoulder retaining wall diseases at K56 section of Zhangzhou-Quanzhou Railway,and analyzed the reasons of the extroversive deformation of the subgrade shoulder retaining wall. By using the general limit equilibrium method,this paper carried out numerical analysis on slope stability,and found out the most disadvantageous sliding plane( namely fracture plane). Also,by using Coulomb theory,the positive soil pressure and the disease upon the subgradeshoulder retaining wall were checked and calculated. After a comprehensive comparative analysis on the economic applicability, construction superiority, and the influence on the existing subgrade, a strengthening scheme was determined: grouting the existing subgrade shoulder retaining wall plus using the ribbed plate anchor wall. As a result,with this scheme,the existing subgrage shoulder disease was treated comprehensively,and the deformation problem in existing subgrade shoulder retaining wall was effectively settled under limited objective condition.