土石混合填方地基强夯试验研究
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摘要
通过对3种夯击能下不同夯点间距和土石比的组合,设置6个试验区,对土石混合填方地基进行强夯试验研究。分析了强夯施工监测数据,采用动力触探和平板荷载试验检验了强夯加固效果。试验结果表明,土石混合填料夯坑周围变形以隆起为主,而土石比对夯坑周边变形影响不明显;强夯后的土石混合填方地基,动力触探击数得到大幅提高,地基承载力较好。
Experimental study is executed by a series of experiments of dynamic compaction in three classes of tamping energy based on the different compaction spacing and proportion of soil and stone. Six test areas are arranged. Monitoring data of dynamic compaction construction is analyzed. Dynamic compaction effect is measured by dynamic penetration tests( DPT) and plate loading tests( PLT). The research result shows that the main deformation around the tamper hole is upheaval. Influence of proportion of soil and stone on the deformation around the tamper hole is not obvious. Blow counts of dynamic penetration tests of the foundation treated by dynamic compaction are greatly increased. In the same time,the foundation has a better bearing capacity.
Experimental study is executed by a series of experiments of dynamic compaction in three classes of tamping energy based on the different compaction spacing and proportion of soil and stone. Six test areas are arranged. Monitoring data of dynamic compaction construction is analyzed. Dynamic compaction effect is measured by dynamic penetration tests( DPT) and plate loading tests( PLT). The research result shows that the main deformation around the tamper hole is upheaval. Influence of proportion of soil and stone on the deformation around the tamper hole is not obvious. Blow counts of dynamic penetration tests of the foundation treated by dynamic compaction are greatly increased. In the same time,the foundation has a better bearing capacity.
引文
[1]安明.强夯法在大块石高填方地基中应用[J].施工技术,2009,38(10):70-71.
[2]Chow Y K,Yong D M.Dynamic compaction analysis[J].Journal of Geotechnical Engineering,1992,118(8):1141-1157.
[3]周德泉,张可能,刘宏利,等.强夯加固填土的效果与机理分析[J].中南大学学报:自然科学版,2004,32(2):322-327.
[4]黄达,金华辉,吴雄伟.碎石土强夯加固效果荷载试验分析[J].西南交通大学学报,2013,48(3):435-440,454.
[5]蔡袁强,陈超,徐长节.强夯加固回填土地基的三维数值模拟[J].岩土力学,2007,28(6):1108-1112.
[6]高政国,杜雨龙,黄晓波,等.碎石填筑场地强夯加固机制及施工工艺[J].岩石力学与工程学报,2013,32(2):377-384.
[7]刘运涛,张学飞,丁月双.强夯法在碎石土高填方边坡中的应用[J].施工技术,2012,41(11):57-59.
[8]黄达,金华辉.土石比对碎石土强夯地基加固效果影响规律瑞利波检测分析[J].岩土力学,2012,33(10):3067-3072.
[9]中国建筑科学研究院.JGJ79—2012建筑地基处理技术规范[S].北京:中国建筑工业出版社,2013.
[10]GB50021—2001岩土工程勘察规范(2009年版)[S].北京:中国建筑工业出版社,2009.
[2]Chow Y K,Yong D M.Dynamic compaction analysis[J].Journal of Geotechnical Engineering,1992,118(8):1141-1157.
[3]周德泉,张可能,刘宏利,等.强夯加固填土的效果与机理分析[J].中南大学学报:自然科学版,2004,32(2):322-327.
[4]黄达,金华辉,吴雄伟.碎石土强夯加固效果荷载试验分析[J].西南交通大学学报,2013,48(3):435-440,454.
[5]蔡袁强,陈超,徐长节.强夯加固回填土地基的三维数值模拟[J].岩土力学,2007,28(6):1108-1112.
[6]高政国,杜雨龙,黄晓波,等.碎石填筑场地强夯加固机制及施工工艺[J].岩石力学与工程学报,2013,32(2):377-384.
[7]刘运涛,张学飞,丁月双.强夯法在碎石土高填方边坡中的应用[J].施工技术,2012,41(11):57-59.
[8]黄达,金华辉.土石比对碎石土强夯地基加固效果影响规律瑞利波检测分析[J].岩土力学,2012,33(10):3067-3072.
[9]中国建筑科学研究院.JGJ79—2012建筑地基处理技术规范[S].北京:中国建筑工业出版社,2013.
[10]GB50021—2001岩土工程勘察规范(2009年版)[S].北京:中国建筑工业出版社,2009.