摘要
目的为了探讨工程设计和施工中适用膨胀土膨胀力的测试方法.方法对"压力-膨胀量曲线法"进行了改进,利用改进的测试方法,对西安南京铁路,合肥南京试验段进行了6组现场原位地基土的膨胀力试验.结果确定了膨胀土地区合理的地基处理原则以及现场膨胀土合理的地基处理深度.结论膨胀土路基为半无限体空间体,采取有侧限的原位膨胀力试验是合理可行的.
Constant volume method, back pressure method, and curve method of pressure-swelling capacity are the three commonly used measurement methods of expansive force. All carried out in laboratories, their results are different from those of open-air in-situ tests. For a better swelling soil ground expansive force test method in engineering design and construction, the authors improve the curve method of pressure-swelling capacity through analyzing and researching. Hefei-Nanjing test section of Xi'an-Nanjing railway was undergone with six-group in-situ swelling soil ground expansive force tests, the result of which, according to this method, confirmed the rational ground disposed principle of swelling soil area and the rational depth of swelling soil ground in field. It is therefore easy to conclude that the swelling soil ground is a semi-infinite space and it is feasible to adopt the lateral restriction test of in situ swelling soil.
出处
《沈阳建筑大学学报（自然科学版）》
EI
CAS
2005年第1期29-31,共3页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金(50204003)
关键词
膨胀土
地基
原位膨胀力
荷载观测
试验方法
铁路
Curve fitting
In situ processing
Pressure
Railroads
Soils
Swelling
Volume measurement
