粗颗粒土静力压实特性的试验研究
|
摘要
研究粗颗粒土的压实特性随级配和含水率的变化规律,对工程实践具有重要的指导意义.以大石峡土石坝的筑坝料为研究对象,借助分形级配方程,分别进行了不同级配粗颗粒土的相对密度试验和不同级配不同含水率粗颗粒土的静力压实试验,研究了级配和含水率对试验土料压实特性的影响规律.结果表明,当含水率达到最佳时,粗颗粒土达到最大干密度,超过最佳含水率时反而不利于粗颗粒土的压实;由静力作用得到的干密度和动力作用得到的最大干密度随分形维数的增加呈现相同的变化趋势,均在分形维数为2.62时出现极值点,对应的级配为最优级配.将最优分形维数取为2.60,并通过一些工程堆石料的级配曲线验证了其合理性.研究结论可为填方工程中填筑料的加水量控制和级配设计提供可靠的理论依据.
In this paper,there is a great significance for engineering practice to study the compactness of coarsegrained soil with gradation and water content. Taking dam materials of Dashixia earth-rock dam as the research object,the relative density test of coarse-grained materials with the different gradation and static compaction test of coarsegrained materials with the different gradation and water content are carried out respectively by means of fractal gradation equation,and the effects of gradation and water content on test soil are studied. The results show that when the moisture content reaches the optimum,the maximum dry density of coarse-grained materials are reached the maximum,but when the moisture content exceeds the optimum,it is not conducive for the compaction of coarse-grained materials. We find the maximum dry density is obtained by the static and dynamic action shows the same trend with the increasing of fractal dimension,and the extreme point appears when the fractal dimension is 2.62. The optimal fractal dimension is 2.60,and its rationality is verified by the gradation curves of some engineering rockfill materials. The research conclusion provides a reliable theoretical basis for filling water control and gradation design in filling engineering.
In this paper,there is a great significance for engineering practice to study the compactness of coarsegrained soil with gradation and water content. Taking dam materials of Dashixia earth-rock dam as the research object,the relative density test of coarse-grained materials with the different gradation and static compaction test of coarsegrained materials with the different gradation and water content are carried out respectively by means of fractal gradation equation,and the effects of gradation and water content on test soil are studied. The results show that when the moisture content reaches the optimum,the maximum dry density of coarse-grained materials are reached the maximum,but when the moisture content exceeds the optimum,it is not conducive for the compaction of coarse-grained materials. We find the maximum dry density is obtained by the static and dynamic action shows the same trend with the increasing of fractal dimension,and the extreme point appears when the fractal dimension is 2.62. The optimal fractal dimension is 2.60,and its rationality is verified by the gradation curves of some engineering rockfill materials. The research conclusion provides a reliable theoretical basis for filling water control and gradation design in filling engineering.
引文
[1]陈坚.路基粗颗粒填料堆积特性试验研究[D].成都:西南交通大学,2010.
[2]余明东,钱波,何仕海.黏性粗粒土压实特性试验研究[J].人民黄河,2015,37(6):99-101.
[3] DENG G D,ZHANG J S,MENG F,et al. Static characteristics of coarse-grained soils[J]. Electronic Journal of Geotechnical Engineering,2013,18:5383-5396.
[4]杜俊,侯克鹏,梁维,等.粗颗粒土压实特性及颗粒破碎分形特征试验研究[J].岩土力学,2013,34(S1):155-161.
[5]彭勃.红砂岩土静力压实特性及能耗规律试验研究[D].赣州:江西理工大学,2015.
[6]朱俊高,翁厚洋,吴晓铭,等.粗颗粒土级配缩尺后压实密度试验研究[J].岩土力学,2010,31(8):2394-2398.
[7]冯忠居,张永清.粗粒土路基的压实试验[J].长安大学学报(自然科学版),2004,24(3):9-12.
[8]包卫星,郭小龙,杨万精.干旱荒漠区天然砂砾路基填料压实特性分析[J].中国公路学报,2017,30(2):18-24.
[9]杨有海,赖国泉.戈壁地区高速铁路路基填筑试验研究[J].铁道学报,2011,33(3):77-83.
[10]孔祥臣,王加龙,刘晓佳.土石混合料振动击实特性的试验研究[J].地下空间与工程学报,2007,3(1):55-61.
[11]石熊,张家生,刘蓓,等.高速铁路粗粒土填料级配改良试验[J].中南大学学报(自然科学版),2014,45(11):3964-3969.
[12]陈宏伟.粗粒土压实试验研究[D].西安:长安大学,2004.
[13] ZHU S,FENG Y M,FENG S R,et al. Particles gradation optimization of blasting rockfill based on fractal theory[J]. Advanced Materials Research,2011,366:469-473.
[14] HUANG Y B,LI Y J,JIAO T. Relationship of fractal structure and compactibility of coarse grain soil in high speed railway subgrade[J]. Applied Mechanics and Materials,2013,438-439:1108-1111.
[15]南京水利科学研究院.土工试验规程:SL 237—1999[S].北京:中国水利水电出版,1999.
[16]朱晟,钟春欣,郑希镭,等.堆石体的填筑标准与级配优化研究[J].岩土工程学报,2018,40(1):108-115.
[17]吴莹,马刚,周伟,等.基于分形理论的堆石料级配优化研究[J].岩土力学,2016,37(7):1977-1985.
[18]朱俊高,郭万里,王元龙,等.连续级配土的级配方程及其适用性研究[J].岩土工程学报,2015,37(10):1931-1936.
[19]杜延龄,黄丽清.高土石坝关键技术问题研究[M].北京:中国水利水电出版社,2013.
[20]傅华,韩华强,凌华.堆石料级配缩尺方法对其室内试验结果的影响[J].岩土力学,2012,33(9):2645-2649.
[2]余明东,钱波,何仕海.黏性粗粒土压实特性试验研究[J].人民黄河,2015,37(6):99-101.
[3] DENG G D,ZHANG J S,MENG F,et al. Static characteristics of coarse-grained soils[J]. Electronic Journal of Geotechnical Engineering,2013,18:5383-5396.
[4]杜俊,侯克鹏,梁维,等.粗颗粒土压实特性及颗粒破碎分形特征试验研究[J].岩土力学,2013,34(S1):155-161.
[5]彭勃.红砂岩土静力压实特性及能耗规律试验研究[D].赣州:江西理工大学,2015.
[6]朱俊高,翁厚洋,吴晓铭,等.粗颗粒土级配缩尺后压实密度试验研究[J].岩土力学,2010,31(8):2394-2398.
[7]冯忠居,张永清.粗粒土路基的压实试验[J].长安大学学报(自然科学版),2004,24(3):9-12.
[8]包卫星,郭小龙,杨万精.干旱荒漠区天然砂砾路基填料压实特性分析[J].中国公路学报,2017,30(2):18-24.
[9]杨有海,赖国泉.戈壁地区高速铁路路基填筑试验研究[J].铁道学报,2011,33(3):77-83.
[10]孔祥臣,王加龙,刘晓佳.土石混合料振动击实特性的试验研究[J].地下空间与工程学报,2007,3(1):55-61.
[11]石熊,张家生,刘蓓,等.高速铁路粗粒土填料级配改良试验[J].中南大学学报(自然科学版),2014,45(11):3964-3969.
[12]陈宏伟.粗粒土压实试验研究[D].西安:长安大学,2004.
[13] ZHU S,FENG Y M,FENG S R,et al. Particles gradation optimization of blasting rockfill based on fractal theory[J]. Advanced Materials Research,2011,366:469-473.
[14] HUANG Y B,LI Y J,JIAO T. Relationship of fractal structure and compactibility of coarse grain soil in high speed railway subgrade[J]. Applied Mechanics and Materials,2013,438-439:1108-1111.
[15]南京水利科学研究院.土工试验规程:SL 237—1999[S].北京:中国水利水电出版,1999.
[16]朱晟,钟春欣,郑希镭,等.堆石体的填筑标准与级配优化研究[J].岩土工程学报,2018,40(1):108-115.
[17]吴莹,马刚,周伟,等.基于分形理论的堆石料级配优化研究[J].岩土力学,2016,37(7):1977-1985.
[18]朱俊高,郭万里,王元龙,等.连续级配土的级配方程及其适用性研究[J].岩土工程学报,2015,37(10):1931-1936.
[19]杜延龄,黄丽清.高土石坝关键技术问题研究[M].北京:中国水利水电出版社,2013.
[20]傅华,韩华强,凌华.堆石料级配缩尺方法对其室内试验结果的影响[J].岩土力学,2012,33(9):2645-2649.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |