排水措施对黄河堤防淤背体排水效果试验研究  

Experimental study of drainage effect for different drainage measures on Yellow River dike body reinforced by desilting

作　　者：刘小文[1] 许成承[1] 沈细中[2] 胡小荣[1] 

机构地区：[1]南昌大学建筑工程学院,南昌330031 [2]黄河水利委员会黄河水利科学研究院,郑州450003

出　　处：《岩土力学》2010年第11期3563-3568,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No10862004)

摘　　要：选择水平盲沟、土工席垫及水平和竖向PVC渗管3种排水方案,在黄河山东东明某堤段淤背体冲填施工中进行排水效果试验。通过埋设在淤区内的地下水位观测点,得到淤区内地下水位与时间的变化规律。试验结果表明,采取一定的排水措施能加速淤区土体的固结,但排水效果与排水方案有关;土工席垫排水与水平盲沟排水效果相差不大,且排水效果与淤土厚度有关,3m左右淤土厚度设置一层水平排水盲沟或土工席垫,其排水效果较好;淤土厚度增加,其排水效果变差;但两者均不能有效防止横向围堤坍塌。采用水平和竖向PVC渗管方案,其排水效果好,特别是设置了竖向PVC渗管,能有效防止横向围堤坍塌。试验成果为黄河放淤固堤工程加速淤背体排水固结设计及施工提供参考。In order to explore drainage effect of desilting soil on the Yellow River dike,three drainage measures including horizontal blind ditches,geotechnical mesh drainage cushions,and horizontal and vertical infiltration PVC drainage pipes,are tested in the Dongming section of the Yellow River embankment in Shandong province.Relationships between groundwater level and time are obtained through measuring groundwater levels of observation point in the deposition zone.The test results show that drainage measures can speed up the soil consolidation of the Yellow River dike by desilting;but effects of drainage are related to drainage measures.The difference of drainage effects of the earthwork mesh drainage cushions and blind ditches are not obvious;and it is related to thickness of soil layer.The drainage effect is very good when setting up a drainage layout such as blind ditch drainages or earthwork mesh drainage cushions with about every 3 m thickness dike by desilting,but drainage effect is bad if desilting soil thickness increases.With the thickness increment,the collapse of transverse dikes can not be prevented by the two types of drainage methods.Horizontal and vertical seepage drainage pipe program has the best effect of these methods,especially for the establishment of the vertical PVC pipes;and the collapse of transverse dikes can be effectively prevented.The test results provide reference for design and construction for speeding up drainage rate of the Yellow River dikes.

关 键 词：黄河堤防 淤背体 排水效果 试验 

分 类 号：TU411[建筑科学—岩土工程]