摘要
通过膨胀土多次干湿循环的三轴和直剪实验,从试样裂隙率计算结果可以得出,三轴试样,经第1次循环,其表面裂隙率增幅最大,2～4次循环增幅较大,第5次循环增幅较小。直剪试样,试样表面裂隙率经1～3次循环增幅较大,第4次循环增幅较小,第5次循环以后试样表面裂隙率有所降低,但降低的幅度不大。总的说来,随干湿循环次数的不断增加,膨胀土试样表面裂隙率不断增大。
By means of the wetting-drying cycle tests of triaxial and direct-shear on the expansive soil.The test finds that with first wetting-drying cycle triaxial test,the crack ratio in expansive soil sample surface is the largest increase,with second to fourth wetting-drying cycle,the crack ratio in expansive soil sample surface is the bigger increase.And the crack ratio in expansive soil sample surface is the little increase,with the wetting-drying cycle is more than five.And the same result is finds in the direct-shear test.All in all,With the number of times wetting-drying cycle increasingly,the crack ratio in expansive soil sample surface is constantly increasing.
出处
《工程地质学报》
CSCD
北大核心
2011年第4期478-482,共5页
Journal of Engineering Geology
基金
国家自然科学基金项目(50868003)
广西自然科学基金项目(GKN07109005-6)
关键词
膨胀土
干湿循环
裂隙
分形
Expansive soil
Witting-drying cycle
Crack
Fractal
