摘要
在对望花亭水库既有土坝坝基大理岩灌浆过程中发现,存在劈裂坝体及坝顶出现劈裂缝、坝顶或坝坡冒浆等异常劈裂现象,该现象既不同于白氏劈裂式灌浆法,也和章氏劈裂式灌浆法不同,是在对坝基灌浆过程中形成的一种新的衍生的劈裂灌浆现象。考虑到对坝基所用的灌浆材料为水泥浆液,并且凝结后在坝体内形成的结石体改变了既有土坝的均质性,因此,人们总是担心这种坝基灌浆方法是否会对坝体构成新的隐患。在介绍传统劈裂式灌浆方法的基础上,对新的衍生的劈裂灌浆现象与章氏灌浆法的灌浆目的、出浆位置、灌浆材料、帷幕形态、坝体变形以及坝体稳定性计算等方面进行了简单的对比与分析。建议重点研究这种新的衍生的劈裂灌浆现象劈裂坝体后所形成的结石体与坝体土的结合程度、结石体的形态、结石体与坝体土的变形状况、结石体对坝体结构安全性及渗流安全性的影响程度及灌浆机理等,这不仅有利于灌浆实践活动,也会进一步促进劈裂灌浆理论的发展。
During the process of grouting the marble dam foundation of the existing earth dam of Wanghuating reservoir,there were some unusual phenomena such as splitting dam body,splitting slots on dam crest,emitting grout from dam crest or dam gradient. That is a novel splitting grouting phenomenon. Considering that the grouting material was cement slurry,it influenced the character of existing earth dam after being congealed;people were worried about the new hidden dangers due to the grouting. This paper compared and analyzed the new derivative split grouting phenomenon with the Zhang′s grouting method based on introducing the traditional derivative split grouting method. It is suggested to study the novel splitting grouting phenomenon such as the conjunction degree between calculus formed by the cement slurry which split the dam body and earth,the shape of the calculus,the transfiguration of calculus and dam body and earth,influence in the structural safety and seepage safety caused by calculus,and grouting theory and etc.. It will not only be benefit to the practical grouting but also promote development of grouting theory.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第13期2277-2282,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
河南省自然科学科技攻关项目(001150202)
河南大学自然科学基金重点项目(XK03ZDJZ161
关键词
水工结构
劈裂灌浆现象
灌浆方法
望花亭水库
hydraulic structure
split grouting phenomenon
grouting method
Wanghuating reservoir
