福建省典型填土路基施工的机械碾压组合
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摘要
以福建省不同地区的8条高等级公路路基填土为例(低液限细粒土与低液限粗粒土),采用不同的压实机械组合,按照路基不同层位的压实标准对其进行碾压试验.结果表明:当路基填土松铺厚度为30 cm、碾压机械吨位为20~22 t、机械行驶速度在2~4 km·h~(-1)时,压实度达到93%、94%、96%所需强振碾压遍数分别为2~3、3~4、4~5遍.对黏土质砾路基,松铺厚度为40 cm、碾压机械吨位为22 t,压实度达到93%、94%、96%所需强振碾压遍数分别为1、2、4遍.对低液限粉土路基,碾压机械吨位为30 t,松铺厚度为35 cm,压实度达到93%所需强振碾压遍数为2遍;松铺厚度为45 cm,压实度达到94%、96%所需强振碾压遍数分别为4、5遍.
The subgrade filling of 8 high-grade highways in different regions of Fujian Province is selected( low liquid limit fine grained soil and low liquid limit coarse grained soil),using different combinations of mechanical compaction,rolling test according to the different layers of the subgrade compaction standard. The results show that: when the filling thickness of subgrade filling is 30 cm,the rolling machine tonnage is 20-22 t,and the mechanical traveling speed is 2-4 km·h~(-1),the compaction degree reached 93% and 94% and 96% required strong vibration compaction times were 2-3 and 3-4 and 4-5 times. The clay gravel subgrade,loose paving thickness is 40 cm,the rolling machine tonnage is 22 t,the compaction degree reached 93% and 94% and 96% required strong vibration compaction times were 1 and 2 and 4 times. For low liquid limit silt roadbed,compaction machinery tonnage is 30 t,loose paving thickness is 35 cm,the compaction degree reached 93% required strong vibration compaction times were 2 times,the thickness of loose paving is 45 cm,the compaction degree reached 94% and 96%equired strong vibration compaction times were 4 and 5 times.
The subgrade filling of 8 high-grade highways in different regions of Fujian Province is selected( low liquid limit fine grained soil and low liquid limit coarse grained soil),using different combinations of mechanical compaction,rolling test according to the different layers of the subgrade compaction standard. The results show that: when the filling thickness of subgrade filling is 30 cm,the rolling machine tonnage is 20-22 t,and the mechanical traveling speed is 2-4 km·h~(-1),the compaction degree reached 93% and 94% and 96% required strong vibration compaction times were 2-3 and 3-4 and 4-5 times. The clay gravel subgrade,loose paving thickness is 40 cm,the rolling machine tonnage is 22 t,the compaction degree reached 93% and 94% and 96% required strong vibration compaction times were 1 and 2 and 4 times. For low liquid limit silt roadbed,compaction machinery tonnage is 30 t,loose paving thickness is 35 cm,the compaction degree reached 93% required strong vibration compaction times were 2 times,the thickness of loose paving is 45 cm,the compaction degree reached 94% and 96%equired strong vibration compaction times were 4 and 5 times.
引文
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[13]韩永红.低液限粘土及粉土填筑路基施工技术[J].交通世界(建养),2009(增刊1):134-135.
[2]杨红霞.低液限粉土工程特性与路基填筑施工技术[J].路基工程,2006(4):93-95.
[3]孙丽杰.高等级公路高含水量低液限粉土路基施工[J].铁道标准设计,2000,20(7):100-101.
[4]申爱琴,郑南翔,苏毅,等.含砂低液限粉土填筑路基压实机理及施工技术研究[J].中国公路学报,2000,13(4):12-15.
[5]查旭东,王宏祥,万剑平.高液限红粘土路堤碾压工艺试验研究[J].交通科学与工程,2011,27(1):1-6.
[6]刘丽萍.低液限粉土路基填料工程特性研究[J].路基工程,2010(2):65-66.
[7]万智,郭爱国,谈云志,等.湘西南红黏土路堤填筑技术研究[J].岩土力学,2011,32(8):2281-2286.
[8]白银涌,文畅平,曾娟娟,等.弱膨胀土路基碾压的现场试验研究[J].中国科技论文,2017,12(1):37-40.
[9]HUANG W,YE Q.Study on subgrade construction technology for expansive soil section of expressway[J].Energy Conservation and Environmental Protection in Transportation,2016,14(3):24-28.
[10]胡滔.重复荷载作用下高液限粘土路基永久变形分析[D].长沙:中南大学,2011.
[11]交通部公路科学研究院.公路土工试验规程:JTG E40-2007[S].北京:人民交通出版社,2007.
[12]中交第二公路勘察设计研究院有限公司.公路路基设计规范:JTG D30-2015[S].北京:人民交通出版社,2015.
[13]韩永红.低液限粘土及粉土填筑路基施工技术[J].交通世界(建养),2009(增刊1):134-135.