粗颗粒填料压实动态干密度控制研究
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摘要
黏土心墙砂砾(卵)石坝或面板堆石坝的砂卵石等填筑过程中现场检测结果经常出现相对密度大于1的不合理现象,施工控制中测定砂砾(卵)石的相对密度,成为控制施工质量、保证工程建设顺利进行的关键。通过分析现场砂砾(卵)石料试验结果,发现砂砾(卵)石料中大于5 mm粒径的粗粒含量与其最大、最小干密度存在曲线关系,利用试验结果绘制砂砾(卵)石中粒径大于5 mm的粗粒含量与干密度关系曲线,根据检测样品中粒径大于5 mm的粗粒含量,通过关系曲线确定样品的干密度,计算检测样品压实后的相对密度。研究表明,这一方法可以很好地解决填筑过程中现场填料检测得到的相对密度大于1的不合理现象。
In the process of filling the clay core wall gravel(pebble) stone dam or concrete rockfill dam, the on-site test results often show an unreasonable phenomenon with a relative density greater than 1 and the relative density of the gravel(pebble) stone is determined during construction control, becoming the key of quality control and ensuring smooth construction of the project. By analyzing the results of the gravel(pebble) stone in the field, it was found that there was a certain curve relationship between the coarse grain content of the gravel(pebble) stone and the maximum and minimum dry density, and the test results were used to draw the coarse grain content of the gravel(pebble) stone larger than 5 mm. According to the dry density relationship curve and the content of the coarse particles in the detected sample of more than 5 mm, the dry density value of the sample was determined by a relationship curve and the relative density of the test sample after compaction was calculated. The study shows that this method can well solve the irrational phenomenon of the relative density greater than 1.
In the process of filling the clay core wall gravel(pebble) stone dam or concrete rockfill dam, the on-site test results often show an unreasonable phenomenon with a relative density greater than 1 and the relative density of the gravel(pebble) stone is determined during construction control, becoming the key of quality control and ensuring smooth construction of the project. By analyzing the results of the gravel(pebble) stone in the field, it was found that there was a certain curve relationship between the coarse grain content of the gravel(pebble) stone and the maximum and minimum dry density, and the test results were used to draw the coarse grain content of the gravel(pebble) stone larger than 5 mm. According to the dry density relationship curve and the content of the coarse particles in the detected sample of more than 5 mm, the dry density value of the sample was determined by a relationship curve and the relative density of the test sample after compaction was calculated. The study shows that this method can well solve the irrational phenomenon of the relative density greater than 1.
引文
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[14] 金兰,熊治文,程佳,等.高速铁路路基粗颗粒填料冻胀特性改良试验研究[J].铁道建筑,2016(2):102-105.
[15] 赵国堂,蒋金洋,崔颖辉,等.高速铁路路基填料中细颗粒分布特征及其对冻胀的影响[J].铁道学报,2017,39(10):1-9.
[16] 贾莉浩.高速铁路高填方路基粗颗粒填料关键技术研究[D].长沙:中南大学,2013:27-28.
[17] 徐永福.颗粒破碎对粗颗粒填料剪切强度的影响[J].固体力学学报,2018,39(5):513-521.
[18] 张聪颖.高速铁路路基粗颗粒填料冻胀特性研究[J].铁道工程学报,2018,35(2):24-28.
[19] 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.
[2] 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.
[3] 程焕达,冉淇.高填路基粗颗粒填料的压缩变形特性研究[J].黑龙江交通科技,2016,39(4):21-22.
[4] 高建强,白瑞强,马勤国.非饱和粗颗粒土体的冻结试验研究[J].冰川冻土,2018,40(1):94-101.
[5] 傅华,凌华,蔡正银.粗颗粒土颗粒破碎影响因素试验研究[J].河海大学学报(自然科学版),2009,37(1):75-79.
[6] 张嘎,张建民.粗颗粒土的应力应变特性及其数学描述研究[J].岩土力学,2004,25(10):1587-1591.
[7] 冷伍明,刘文劼,赵春彦,等.重载铁路路基压实粗颗粒土填料动力破坏规律试验研究[J].岩土力学,2015,36(3):640-646.
[8] 熊治文,金兰,程佳,等.高速铁路改良粗颗粒填料冻胀特性试验研究[J].中国铁道科学,2015,36(5):1-6.
[9] 周荣,宋晓东.粗粒填料土分形特征与可压实特性相关性研究[J].人民长江,2014,45(1):91-93.
[10] 畅帅,徐日庆.基于裂离比的粗粒料级配曲线预测模型[J].岩石力学与工程学报,2014,33(增刊2):4145-4152.
[11] 傅华,凌华,蔡正银.粗颗粒土颗粒破碎影响因素试验研究[J].河海大学学报(自然科学版),2009,37(1):75-79.
[12] 王瀚霖,许峰,陈仁朋,等.粗颗粒填料含水量的TDR测试方法研究[J].三峡大学学报(自然科学版),2014,36(6):37-42.
[13] 李安原,牛永红,牛富俊,等.粗颗粒土冻胀特性和防治措施研究现状[J].冰川冻土,2015,37(1):202-210.
[14] 金兰,熊治文,程佳,等.高速铁路路基粗颗粒填料冻胀特性改良试验研究[J].铁道建筑,2016(2):102-105.
[15] 赵国堂,蒋金洋,崔颖辉,等.高速铁路路基填料中细颗粒分布特征及其对冻胀的影响[J].铁道学报,2017,39(10):1-9.
[16] 贾莉浩.高速铁路高填方路基粗颗粒填料关键技术研究[D].长沙:中南大学,2013:27-28.
[17] 徐永福.颗粒破碎对粗颗粒填料剪切强度的影响[J].固体力学学报,2018,39(5):513-521.
[18] 张聪颖.高速铁路路基粗颗粒填料冻胀特性研究[J].铁道工程学报,2018,35(2):24-28.
[19] 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.