混凝土浇筑施工对穿黄隧洞衬砌垫层渗透性影响试验研究  

Experimental research on clogging of mat base of inside and outside liner of Yellow River-crossing tunnel by concrete construction

作　　者：定培中[1] 周密[1] 张伟[1] 

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《岩土力学》2009年第10期3159-3162,3167,共5页Rock and Soil Mechanics

基　　金：国家十一五科技支撑课题(No.2006BAB04A11)

摘　　要：在南水北调穿黄隧洞衬砌混凝土浇筑施工中有可能对衬砌垫层渗透性造成影响的因素主要有压力、混凝土塌落度、浇筑时间、振捣方式等。通过模型模拟试验方法,对衬砌施工工况下上述各因素的影响进行研究。结果表明,法向压力可使垫层土工织物渗透性降低并趋近于某一特定值;混凝土塌落度、浇筑时间对渗透性有一定影响,但不同塌落度、浇筑时间影响差别不明显,而不同振捣方式可使土工织物渗透性降低1～2个数量级。为克服以上因素的影响,推荐三维结构的排水土工网作为穿黄隧洞衬砌垫层材料。The clogging factors of mat base of inside and outside liner of the Yellow River-crossing tunnel include pressure, concrete slump, concrete pouting time and mixing measures. Model expeiments are used to evaluating the influence of these factors. The results show that the vertical pressure reduces the seepage coefficient to a certain level. The slump and mixing time may make a certain degree of reducements without big difference. Different mixing measures reduce he seepage coefficient to lot 2 magnitudes down. In order to avoid these influences, a 3-D geotextile net is recommended as the material of mat base of inside and outside liner of the Yellow River-crossing tunnel.

关 键 词：南水北调 穿黄隧洞 衬砌 软垫层 混凝土施工 淤堵 

分 类 号：U451[建筑科学—桥梁与隧道工程]