摘要
根据朔黄重载铁路路基斜打旋喷桩的加固方法,选取典型工点进行灌砂、二次变形模量Ev2、动态变形模量Evd、轻型动力触探N10和地基系数K30等现场检测试验,采用桩土复合试验指标评价斜打旋喷桩的加固效果。试验分析表明:加固后地基基本承载力滓0、地基系数K30、变形模量Ev2和动态变形模量Evd指标均有明显提高,但桩间土压实度K提高不大。综合分析,斜打旋喷桩对路基起到了良好的加固效果。其评价方法和成果可供同类工程参考和利用,具有重要推广价值。
According to the reinforcing-method of oblique jet grouting pile in the embankment of shuo-huang heavy haul railway, sand replacement, second modulus of deformation （Ev2）, dynamic modulus of deformation （Evd）,light dynamic penetration （N10）,coefficient of subgrade reaction （K30） and other field tests have been done in a typical work site. Pile-soil composite test indicators have been used to evaluate the reinforcing-effect of the oblique jet grouting pile. Test analysis indicate that the basic bearing capacity of foundation （σ0）,coefficient of subgrade reaction （K3o）,second modulus of deformation （Ev2）, and dynamic modulus of deformation （Evd）have been significantly enhanced, while the improvement of the compaction factor （K） of the soil between piles is not high. It is integrated to show that the oblique jet grouting pile has a good effect in reinforcing the embankment. The evaluation method and achievement can be referenced and utilized in other similar projects. And, it has a significant value to popularize this method.
出处
《神华科技》
2012年第5期81-86,共6页
Shenhua Science and Technology
基金
国家高技术研究发展计划(863)专题(2009AA11Z101)
关键词
重载铁路路基
斜打旋喷桩
路基检测
加固效果
Heavy haul railway roadbed
Oblique jet grouting pile
Roadbed detection
Reinforcing-effect
