粗粒土浸水饱和时间试验研究  

Experimental Study of Saturation Time of Coarse-Grained Soil

作　　者：朱俊高[1,2] 李翔[1,2] 徐佳成[3] 邓刚[4] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程科学研究所,江苏南京210098 [3]中国国际工程咨询公司,北京100048 [4]中国水利水电科学研究院岩土工程研究所,北京100038

出　　处：《重庆交通大学学报（自然科学版）》2016年第1期85-89,183,共6页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(51479052);国家"973"计划资助项目(2013CB036404);江苏省六大人才高峰项目(JZ-011)

摘　　要：对来自双江口、两河口、小浪底、马吉4座土石坝的不同粒径的粗粒土进行浸水饱和时间试验研究,分析了吸水率与吸水时间、粒径、颗粒岩性等的关系。试验结果表明：粗粒土浸水达到饱和时间与其粒径成正相关,颗粒的岩性也是影响浸水饱和时间重要因素,吸水率与浸水历时的关系可以用双曲线函数来描述,并对该函数进行了初步验证。同时,进一步对实际试验用多粒组级配料的饱和时间进行分析,建议了粗粒土三轴剪切试验及蠕变试验的试样饱和时间估算方法及需要的合理饱和时间。对最大粒径为60 mm的粗粒土,三轴剪切试验建议饱和时间0.5~1 h,蠕变试验建议饱和时间2 h。The inundation saturation test on different particle size of coarse grained soil from four earth-rock dams,including Shuangjiangkou,Lianghekou,Xiaolangdi and Maji was carried out. The relationships among water absorption rate,water absorption time,particle size and lithology of grain size were analyzed. The results show that there is a positive correlation between the saturation time and particle size of coarse-grained soil,and the lithology of grain size is also an important factor that influences the inundation saturation time. Furthermore,the correlation between the rate and time of water absorption turns out to be a hyperbolic function after a preliminary verification. Meanwhile,the saturation time of multi-particle groups in the actual test was further analyzed,and the reasonable saturation time and approach to estimate the time for the tri-axial shear and the creep test samples of coarse-grained soil were recommended. In the case of the coarse-grained soil with maximum particle size of 60 mm,the recommended saturation time of tri-axial shear test is among 0. 5 ~ 1 h,and the recommended saturation time of the creep test is 2 h.

关 键 词：岩土工程 粗粒土 吸水过程 饱和时间 三轴试验 

分 类 号：TU443[建筑科学—岩土工程]