马兰黄土压实工艺的试验研究
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摘要
针对马兰黄土的压实工艺开展了击实试验及系列现场试验研究,分析含水量对压实效果的影响和单项工艺及新型组合工艺的压实工效,给出压实马兰黄土主要物理力学性质、填筑地基承载力特征值及土体变形模量的参考值。试验结果表明:马兰黄土水敏感性强,含水量控制是其压实效果的关键因素,现场压实施工的土体含水量控制范围可取12%～14%,最大干密度可取1.85～1.89 g/cm3,压实施工可首选振碾强夯组合压实工艺,该工艺施工速度快,场地适应性好,可较好地应用于沟壑填筑施工。
A series of tests and Proctor compaction test were carried out to study the compaction characteristics of Malan Losses.Analysis were made of the influence of water content on compaction effect and compaction effect of single or the new combination technology.The reference index of physical and mechanical property of compact Malan Losses were gained,and it was also given reference value of ground bearing capacity and modulus of deformation.The results of the tests showed that compact Malan losses had strong water susceptibility,and water content controlling was the key factor of compaction effect;the scope of water content controlling in-situ was 12%~14% and maximum dry density was 1.85~1.89 g/cm3.The vibrating-dynamic combination technology was best for compacting Malan Losses,and the construction speed of this technology was rapid and compliance was good,and it best for gully fill construction.
A series of tests and Proctor compaction test were carried out to study the compaction characteristics of Malan Losses.Analysis were made of the influence of water content on compaction effect and compaction effect of single or the new combination technology.The reference index of physical and mechanical property of compact Malan Losses were gained,and it was also given reference value of ground bearing capacity and modulus of deformation.The results of the tests showed that compact Malan losses had strong water susceptibility,and water content controlling was the key factor of compaction effect;the scope of water content controlling in-situ was 12%~14% and maximum dry density was 1.85~1.89 g/cm3.The vibrating-dynamic combination technology was best for compacting Malan Losses,and the construction speed of this technology was rapid and compliance was good,and it best for gully fill construction.
引文
[1]李保雄,牛永红,苗天德.兰州马兰黄土的水敏感性特征[J].岩土工程学报,2007,29(2):294-299.
[2]李保雄,牛永红,苗天德.兰州马兰黄土的物理力学特性[J].岩土力学,2007,28(6):1077-1083.
[3]王念秦,罗东海,姚勇,等.马兰黄土动强度及其微结构变化实验[J].工程地质学报,2011,19(4):467-472.
[4]耿兴福,李保雄,苗天德.马兰黄土剪应力松弛特性研究[J].西北地震学报,2011,32(1):36-42.
[5]何青峰,林斌,赵法锁.西安地区马兰黄土的结构强度研究[J].水文地质工程地质,2007(5):21-25.
[6]朱才辉,李宁,刘俊平.压实Q3马兰黄土蠕变规律研究[J].西安理工大学学报,2011,27(4):392-400.
[7]梅源.黄土山区高填方沉降变形控制技术试验研究[D].西安:西安建筑科技大学,2010.
[2]李保雄,牛永红,苗天德.兰州马兰黄土的物理力学特性[J].岩土力学,2007,28(6):1077-1083.
[3]王念秦,罗东海,姚勇,等.马兰黄土动强度及其微结构变化实验[J].工程地质学报,2011,19(4):467-472.
[4]耿兴福,李保雄,苗天德.马兰黄土剪应力松弛特性研究[J].西北地震学报,2011,32(1):36-42.
[5]何青峰,林斌,赵法锁.西安地区马兰黄土的结构强度研究[J].水文地质工程地质,2007(5):21-25.
[6]朱才辉,李宁,刘俊平.压实Q3马兰黄土蠕变规律研究[J].西安理工大学学报,2011,27(4):392-400.
[7]梅源.黄土山区高填方沉降变形控制技术试验研究[D].西安:西安建筑科技大学,2010.
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