建筑垃圾复合地基的试验与数值仿真分析
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摘要
为研究建筑垃圾复合地基的承载性能,自制大型固结仪对某工程中利用建筑垃圾进行路基处理的土样、单桩及复合地基进行室内压缩试验,并通过工程现场静载试验对其承载力进行检测,利用有限元软件对不同桩径、桩长、弹性模量的建筑垃圾复合地基进行数值模拟.结果表明:建筑垃圾复合地基能显著提高软弱土路基的压缩模量,提高其承载力;增大建筑垃圾散体材料桩桩径可以显著提高路基承载力,减小路基沉降;改变桩长及桩身模量对提高软弱土路基承载力和降低路基沉降的效果并不明显.因此,建筑垃圾复合地基可以应用于软土路基处理中.
To study the bearing capacity of construction waste composite foundation,the indoor compression test of the soil of construction waste is made in a project,the single pile and composite foundation are tested by the self-made large consolidometer,and the bearing capacity is examined through the engineering field static load testing,then the different pile length,pile diameter,composite foundation construction waste of elastic modulus was numerically simulated by using the finite element software.The results show that:The construction waste composite foundation can significantly improve the compression modulus of soft soil roadbed and its bearing capacity;Increasing construction waste of granular material pile diameter has significant effect on the reduction of the subgrade settlement and improve the bearing capacity of subgrade;The effect of the change of pile length and pile modulus on the improvement of subgrade settlement and bearing capacity is not obvious.Therefore,the construction waste composite foundation can be applied to soft roadbed treatment.
To study the bearing capacity of construction waste composite foundation,the indoor compression test of the soil of construction waste is made in a project,the single pile and composite foundation are tested by the self-made large consolidometer,and the bearing capacity is examined through the engineering field static load testing,then the different pile length,pile diameter,composite foundation construction waste of elastic modulus was numerically simulated by using the finite element software.The results show that:The construction waste composite foundation can significantly improve the compression modulus of soft soil roadbed and its bearing capacity;Increasing construction waste of granular material pile diameter has significant effect on the reduction of the subgrade settlement and improve the bearing capacity of subgrade;The effect of the change of pile length and pile modulus on the improvement of subgrade settlement and bearing capacity is not obvious.Therefore,the construction waste composite foundation can be applied to soft roadbed treatment.
引文
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[2]李少康.建筑垃圾在公路路基中的应用研究[D].西安:长安大学,2014.LI Shaokang.Research on the application of construction waste in highway subgrade[D].Xi’an:Chang’an University,2014.
[3]河南省人民政府.河南省人民政府关于加强城市建筑垃圾管理促进资源化利用的意见[EB].[2015-07-11].https://www.henan.gov.cn/2015/07-24/239239.html.The People’s Government of Henan Province.Opinions of the people’s Government of Henan Province on strengthening the management of urban construction waste and promoting the utilization of resources[EB].[2015-07-11].https://www.henan.gov.cn/2015/07-24/239239.html.
[4]房建宏,徐安花,姚晓亮,等.热力交互作用下冻土路基融化沉降分析[J].信阳师范学院学报(自然科学版),2018,31(1):129-134.FANG Jianhong,XU Anhua,YAO Xiaoliang,et al.Analysis on the thaw settlement of permafrost embankment under thermal and mechanical interaction[J].Journal of Xinyang Normal University(Natural Science Edition),2018,31(1):129-134.
[5]牛林新,赵莹,商拥辉.低路堤桩-筏复合地基沉降超限治理措施研究[J].信阳师范学院学报(自然科学版),2017,30(4):658-661.NIU Linxin,ZHAO Ying,SHANG Yonghui.Study on treatment measures for settlement overrun of low ramp pile-raft composite foundation[J].Journal of Xinyang Normal University(Natural Science Edition),2017,30(4):658-661.
[6]邹恩,林兰,黄浩扬,等.广州市建筑垃圾资源化的必要性分析[J].再生资源与循环经济,2014(1):32-35.ZOU En,LIN Lan,HUANG Haoyang,et al.The necessity of recycling construction waste in Guangzhou city[J].Renewable Resources and Recycling Economy,2014(1):32-35.
[7]江思义,谭坦,杨炳强.建筑垃圾灰土挤密桩在黄土路基中的设计及应用[J].路基工程,2015,180(3):181-184.JIANG Siyi,TAN Tan,YANG Bingqiang.Design and application of construction waste lime soil compaction piles in loess subgrade[J].Subgrade Engineering,2015,180(3):181-184.
[8]肖杰,吴超凡,湛哲宏,等.水泥稳定砖与混凝土再生集料基层的性能研究[J].中国公路学报,2017,2(2):25-32.XIAO Jie,WU Chaofan,ZHAN Zhehong,et al.Research on performances of cement stabilized brick and concrete recycled aggregate base[J].China Journal of Highway and Transport,2017,2(2):25-32.
[9]郑晓光,陈红缨,王新南.上海地区低碳道路建设技术及工程示范[J].城市道桥与防洪,2011(8):18-22.ZHENG Xiaoguang,CHEN Hongying,WANG Xinnan.Construction technology and engineering demonstration of low-carbon roads in Shanghai Area[J].Urban Roads Bridges&Flood Control,2011(8):18-22.
[10]陈王剑.碎石桩单桩复合地基承载力试验检测[J].黑龙江交通科技,2014(1):54-55.CHEN Wangjian.Test detection of bearing capacity of gravel pile single pile composite foundation[J].Communications Science and Technology Heilongjiang,2014(1):54-55.
[11]于海峰.全国注册岩土工程师专业考试培训教材[M].6版.武汉:华中科技大学出版社,2012.YU Haifeng.Training materials for national registered geotechnical engineer professional examination[M].6th Edition.Wuhan:Huazhong University of Science and Technology Press,2012.
[12]中华人民共和国行业标准.建筑地基检测技术规范(JGJ 340-2015)[S].北京:中国建筑工业出版社,2015.Industry Standard of the People’s Republic of China.Technical code for testing of building foundation soils(JGJ340-2015)[S].Beijing:China Architecture&Building Press,2015.
[13]刘耀堂.CGMT桩在高速公路路基加固中的应用研究[D].郑州:郑州大学,2014.LIU Yaotang.Study on application of CGMT pile in reinforcement of highway subgrade[D].Zhengzhou:Zhengzhou University,2014.