|
位置：首页 >> 期刊文章
|
|
摘要：
|
|
针对长江下游某港口长江港池新建防汛墙在高潮位时发生直径1．5-2．0 m的管涌事故,运用美国Sir-2型地质雷达设备,对整个防汛墙底板下土层的密实程度和管涌等病害情况进行了无损探测。结果表明:新建防汛墙底板以上的陆域侧回填土以及防汛墙底板以下的粉质粘土中局部存在孔隙较大的松散介质,为部分细颗粒流失或潜在渗漏通道区域。探测还发现粉细砂层中局部夹杂有粘土层。最后,根据事故发生的原因,提出了处理建议。
|
|
Based on the occurrence of sand boils with diameters from 1.5 m to 2.0 m under a new flood wall for a port at the lower reach of the Changjiang River during a high tide, GPR equipment of SIR-2 was used to carry out a nondestructive investigation of the density of the foundation soil and sand boils below the whole length of the flood wall. The results of the investigation showed that loose materials with large porosity were found in the backfill above the base plates behind the flood wall and in the silty clay below the base plates, which are deduced to be the areas for the running-off of fine particles or areas of potential sand boiling. During the GPR investigation, it was also discovered that the silty fine sand stratum contains clayey soil in some areas. Finally, measures to tackle such occurrences are proposed on the basis of the causes of the sand boils under the flood wall.
|
|
基金项目：
|
|
国家计委高技术应用部门发展项目资助
|
|
作者简介：
|
|
|
|
参考文献：
|
|
[1]刘政民．1998年九江抗洪启示录[J].江西水利科技,2005,(1):1-5．
[2]程徽丰,张健明．73807部队黄浦江防汛墙安全鉴定工作剖析[J]．上海水务,2004,(3):18-20．
[3]李大心．探地雷达方法与应用[M]．北京:地质出版社,1994．
[4]杨廷槐．油气藏伴生天然气渗漏的雷达检测[J]．遥感技术与资源开发,1993,(1):44-47．
[5] Seje Carlsten,吕珍译．探明堤坝内部侵蚀的雷达技术[J].地震科技情报,1996,(8):1-9．
[6]徐兴新,沈锦音．石灰岩地区水库隐患及渗漏通道地质雷达探测研究[J]．水利水电技术,1999,(9):45-47．
[7]何开胜,王国群．水库堤坝渗漏的地质雷达探测研究[J]．防灾减灾工程学报,2005,25(1):20-24．
[8]王国群,何开胜．堤防动物洞穴的探地雷达探测研究[J]．岩土力学,2006,(5)．
[9]戴呈祥,王士恩．水闸闸基隐患探测雷达图像特征分析[J]．地球物理学进展,2003,(3):429-433．
|
|
服务与反馈：
|
|
【文章下载】【加入收藏】
|
|
|
|
|