机场高填方边坡下人工窑洞群地基处理技术研究
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摘要
以某机场高填方工程为例,对该不良地质形式,提出了"充填窑洞+开挖覆土+强夯"的处理方法,并总结了具体施工技术要点。开展了地基强夯处理试验,提出了强夯施工技术参数。对夯后地基进行了承载力和压实度指标评价,夯后地基的稳定性和密实度明显提高,满足各项设计要求。对强夯后的地基处理效果进行了试验检测,荷载试验、密实度试验和面波试验结果均表明,采用"充填窑洞+开挖覆土+强夯"工艺进行施工后,地基物理力学参数满足设计要求,地基处理取得了良好的效果。
This paper taken the bad geological form of a high fill project in an airport as an example,the treatment method of "filling cave + excavation and overburden +dynamic compaction"was put forward,and specific construction technology points were summarized. The dynamic compaction test of foundation was carried out,and the technical parameters of dynamic compaction were put forward. The bearing capacity and compaction index of the foundation after dynamic compaction were evaluated. After the dynamic compaction,the stability and density of the foundation are obviously improved to meet the design requirements. The effect of foundation treatment after dynamic compaction was tested. Load test,compaction test and surface wave test results show that under the technology of "filling cave + excavation and overburden + dynamic compaction",the physical and mechanical parameters of foundation meet the design requirements,and the foundation treatment has achieved good results.
This paper taken the bad geological form of a high fill project in an airport as an example,the treatment method of "filling cave + excavation and overburden +dynamic compaction"was put forward,and specific construction technology points were summarized. The dynamic compaction test of foundation was carried out,and the technical parameters of dynamic compaction were put forward. The bearing capacity and compaction index of the foundation after dynamic compaction were evaluated. After the dynamic compaction,the stability and density of the foundation are obviously improved to meet the design requirements. The effect of foundation treatment after dynamic compaction was tested. Load test,compaction test and surface wave test results show that under the technology of "filling cave + excavation and overburden + dynamic compaction",the physical and mechanical parameters of foundation meet the design requirements,and the foundation treatment has achieved good results.
引文
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[2]刘汉阳.延安地区废弃窑洞诱发黄土滑坡的破坏机理分析[J].西部探矿工程,2015(11):14-17.
[3]杨庆民,张春丽,冯东翔.在建建筑物下废弃窑洞处理方法的探讨[J].中原工学院学报,2005,16(6):73-75.
[4]中国民用航空总局机场司.民用机场飞行区土(石)方与道面基础施工技术规范:MH 5014—2002[S].北京:中国计划出版社,2002.
[5]中国建筑科学研究院.建筑地基处理技术规范:JGJ79—2012[S].北京:中国建筑工业出版社,2012.
[6]周立新,黄晓波,邓长平.强夯密实处理块碎石填料试验研究[J].工程地质学报,2007,15(6):812-816.
[7]谢春庆,刘汉超,甘厚义,等.高填方块碎石夯实地基变形的研究[J].岩土工程学报,2002,24(1):38-41.
[8]建设综合勘察研究设计院.岩土工程勘察规范:GB50021—2001(2009版)[S].北京:中国建筑工业出版社,2009.
[9]交通部公路科学研究院.公路路基路面现场测试规程:JTG E60—2008[S].北京:人民交通出版社,2008.