摘要
结合巫山县污水处理厂高填方工程,选取压实粘性土样,在室内进行了接近实际应力路径下的“单线法”湿化变形试验,研究了土样在不同的压实度、固结压力和湿化历史下的湿化机理、湿化前后的应力-应变关系及强度变化规律。取得的湿化变形试验成果表明,湿化使土样的变形模量和强度均有所降低;湿化变形不仅包括湿化体应变,而且包括湿化偏应变;随着压实度的增加,湿化变形减小。试验成果为巫山县污水处理厂高填方地基的填筑设计、控制湿化变形的措施和附加压密措施提供了依据。
The high fill of Wushan Municipal Sewage Treatment Plant has a maximal height of 75 m and a volume of 56.7 ten thousand cubic meters. When the TGP's water level arrives at 175 m, the most part of the high fill will be submerged, it is necessary for designer to consider the slaking deformation of the high fill due to wetting. The compacted samples of the clay from the high fill are tested in triaxial apparatus with an approximate actual stress path and a single-line wetting path, the slaking mechanism, the stress-strain relationship and the strength character of non-slaking samples and slaking samples under the conditions of different compacting factors, different consolidation pressures and different slaking histories are studied. The test results indicate that the modulus of deformation and the strength of samples are reduced by wetting, that slaking deformations consist of either slaking volumetric strain or slaking deviator strain and that the slaking deformation is reduced with the increase of compacting factor of the samples. The results offer engineering treatments of designing the high fill of Wushan Municipal Sewage Treatment Plant, controlling the collapsibility and compacting fill.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第9期1385-1389,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(编号:50378073)
关键词
湿化变形
应力
应变
高填方
压实度
Deformation
Land fill
Sewage treatment plants
Stresses
