CRTSⅠ型板式无砟轨道路基沉降抬板维修技术研究.pdfVIP

第59卷 第4期 铁 道 标 准 设 计 Vol.59 No.4 2015年4月 RAILWAY STANDARD DESIGN Apr. 2015 文章编号:1004 2954(2015)04 0013 03 CRTS Ⅰ型板式无砟轨道路基沉降抬板维修技术研究 张珍珍 (中铁第四勘察设计院集团有限公司,武汉 430063) 摘 要:由于地质条件、建设施工等原因,部分高速铁路路基出现不同程度的沉降,影响行车的平顺性。 介绍高速 铁路CRTSⅠ型板式无砟轨道路基沉降抬板维修方案的若干技术问题,提出抬板高度及抬板填充材料刚度的合理 取值。 CRTSⅠ型板式无砟轨道路基沉降可通过扣件调整和抬升轨道板增加充填层厚度等方式进行整治维修。 为 保证抬升轨道板后凸型挡台受力,建议圆形凸台地段抬板高度最大不超过45mm,半圆形凸台地段不应进行抬板。 轨道板抬升采用的填充材料刚度宜与原CA砂浆层保持一致。 关键词:高速铁路; CRTSⅠ型板式无砟轨道; 路基沉降; 抬板; 凸型挡台 + 中图分类号:U213.2 44 文献标识码:A DOl:10.13238/ j.issn.1004-2954.2015.04.004 Study on Slab Uplifting Treatment of Subgrade Settlement of CRTS-ⅠBallastless Slab Track ZHANGZhen-zhen (China Railway Fourth Survey And Design Group Co. ,Ltd. ,Wuhan430063,China) Abstract: Due to geological conditions and construction activities, subgrade settlement in part of high-speed railway seriously affects the train running smoothness. The paper studies on the treatment of subgrade settlement of CRTS-Ⅰballastlessslab trackby lifting slabsandproposesthereasonablevalue of slab lifting height andfilling material stiffness. The subgrade settlement of CRTS-Ⅰballastless slab track can be treated through fastener adjustment and increasing the filling layer thickness by lifting slabs. To assure the shear cam rational strength after slab lifting,it is suggest that the slab lifting height in round shear cam section should belessthan45mmand slablifting shouldbenot carriedout inhalf round shear cam section. The stiffness of filling materials by slab lifting should be consistent with the original CA 收稿日期:2014 07 06;修回日期