北京交通大学学报2012，Vol.36Issue(4)：44-49,6.
朔黄重载铁路路桥过渡段加固路基的检测与分析
Detection and analysis of subgrade reinforced in bridge-subgrade transition section of Shuo-Huang heavy haul railway
摘要
Abstract
Bridge-subgrade transition section is a weak link between roadbed and bridges or culverts in existing heavy haul railway. To detect and evaluate the roadbed bearing capacity is the key to ensure the smooth of railway and comfort of moving train. In this article, Number 170 Bridge's bridge-subgrade transition section of Shuo-Huang railway is detected by K30 plate loading test, light dynamic penetration lust and laboratory test. The results indicate that① Foundation coefficient K30 can intu itively characterize the subgrade stiffness and bearing capacity. The reinforced roadbed's foundation coefficient K30 has increased from 15% to 40% in different positions of bridge-subgrade transition section. ② There is good correlation between foundation coefficient K30 and Light Dynamic Penetration N10.Compaction coefficient and foundation coefficient K30 has no correlation. CD The bridge-subgrade transition section detecting of existing heavy haul railway should do enough light dynamic penetration test, and complementary with foundation coefficient K30 standard. It has important significance for improving the detection efficiency and reducing detection cost and the disturbance of detection to existing railway operation.关键词
既有重载铁路/路桥过渡段/地基系数K30试验/轻型动力触探试验/压实系数Key words
existing heavy haul railway/ bridge-subgrade transition section/ foundation coefficient K30 test/ light dynamic penetration test/ compaction coefficient分类
交通工程引用本文复制引用
李懿,王连俊,丁桂伶,葛宝金,李丹枫..朔黄重载铁路路桥过渡段加固路基的检测与分析[J].北京交通大学学报,2012,36(4):44-49,6.基金项目
国家“863”计划项目资助(2009AA11Z102) （2009AA11Z102）
