解决基坑明水的具体措施与方法  

Some Practical Measures and Methods to Resolve Foundation Pit Clear-sighted Water Issue

作　　者：齐凤霞 刘晓光[2] 李务伦 

机构地区：[1]内蒙古煤田地质局472勘探队,内蒙古通辽028007 [2]吉林省煤田地质局203勘探公司,吉林四平136000

出　　处：《中国煤炭地质》2009年第A02期62-64,共3页Coal Geology of China

摘　　要：在大量实践的基础上,总结出基坑明水的处理方法:在流沙层局部存在的明水时,用高压射流的方法,该方法是事前准备好过滤管,然后用射流沉管法成井,成井后迅速将过滤管放入井内,过滤管的另一端连接水泵,从而达到快速排水的目的;对于渗透性小地层或地层滞水出现明水,可在基坑四边挖集水坑,基坑内按一定的间距挖成小沟,小沟上用碎石填平,并与集水坑相通,形成田字格型盲沟,最后用水泵将集水坑内的水抽走,从而将基坑中的水排掉;人造地层明排是在场地空间狭窄时,在基坑四角上挖集水坑,坑底铺以碎石,形成渗透系数较大的人造地层,碎石上安放过滤管,过滤管与水泵相连,从而将坑内的水排出坑外。实践证明,这些方法简便易行,排水效果明显。Foundation pit clear-sighted water treatment method based on abundant practices is as follows： when clear-sighted water locally existed in quicksand layer, to use high-pressure spray method that is quickly lowering down prepared filtering tube into just completed borehole immediately, connecting a pump on the other end, thus to accomplish the quick drainage. For minor permeability strata or strata stagnating clear-sighted water has appearing, can dig sumps at four corners of the foundation pit, and dig minor grooves in foundation pit in term of stated spacing, to use crushed stone fill and level up the grooves, and let them communicate with sumps to form checkered blind drains, finally pumping away water in sumps, and so removing water from foundation pit. Man-made strata open drainage is when constructing in sites with confined spaces,-dig sumps at four comers of foundation pit, then laying crushed stone on pit bottom to form man-made strata with greater filtration coefficient, lay filtering tubes on the crushed stone and connect them with pump, and so removing water from pit. Practices demonstrated that, the method is simple and convenient, has evident drainage effect.

关 键 词：地下水 明水 基坑 

分 类 号：TU463[建筑科学—结构工程]