秦沈客运专线A14试验段软土路基加固技术研究

Study on consolidation technique for A14 testing section of soft soil roadbed at Qinhuandao-Shenyang passenger transport special railway line

介绍了秦沈客运专线A14试验段软土路基工程设计施工情况。通过对各种地基处理路段沉降观测,探讨了软土路基沉降特征,推测出其最终沉降量和沉降速率,并分析了软基处理措施与沉降的关系。结果表明软土路基沉降受加荷影响很大;采用碎石和粉喷桩处理后地基沉降量比其它处理方法要小;在松软土地层,控制填土不是主要问题。

The design and construction situations of A14 testing section soft soil roadbed on Qinhuangdao-Shenyang passenger transport special railway line are introduced. The subsidence data are observed in the testing sections what were treated through different groundwork treatment measures. The soft soil roadbed subsidence feature is discussed; and the subsidence data and subsidence rate after engineering works are predicted in the roadbed after consolidation treatment according to test data. The relationship between soft soil groundwork treatment measures and subsidences is also analyzed. The researching results indicate: the soft soil roadbed subsidence is affected by the added load very much; the subsidence amount of soft soil roadbed what is treated with gravel piles or lime injected piles is less than other methods of treatment; it is not a key that the rate of filling soil is controlled in the loose and soft soil roadbed.