铁道标准设计Issue(7)：23-27,5.DOI:10.13238/j.issn.1004-2954.2015.07.006
阳安二线膨胀土填料改良研究
Study on Improvement of Expansive Soil Filler of YangAn Railway Second Line
张宗堂1
作者信息
- 1. 中铁第一勘察设计院集团有限公司，西安 710043
- 折叠
摘要
Abstract
The expansive soil is widely distributed in the proposed YangAn second line and the expansive soil can not be directly used as roadbed filler. If other qualified filling material is used the haul distance will be longer with heavy investment, waste of excavated expansive soil and more land coverage. A test is conducted with two representative field soil samples and lime powder as additive in 4%, 6%, 8% and 10% of four levels of incorporation for improvement. Test results show that the soil improvement with mixing ratio greater than 4% can eliminate the swelling, and the improved soil has good water stability and higher strength and meets the design requirements. Compared with the original expansive soil, the improved soil has higher compressive strength and shear strength with the increase of the lime mixing ratio. The mixing ratios for different part of subgrade and different grade of expansive soil are obtained, providing theoretical reference for the design of YangAn second-line subgrade filler.关键词
铁路路基/膨胀土/填料/改良试验Key words
Railway subgrade/Expansive soil/Filler/Improvement test分类
交通工程引用本文复制引用
张宗堂..阳安二线膨胀土填料改良研究[J].铁道标准设计,2015,(7):23-27,5.
