堵塞
薄泥浆
岩土工程
渗透
渗透(战争)
材料科学
水泥
孔隙水压力
防水
振荡(细胞信号)
复合材料
地质学
工程类
膜
化学
考古
历史
生物化学
运筹学
作者
Byungkyu Kim,Jeong-Jun Park,Young-Sam Kwon,Ghang-Bok Jeong,In-Mo Lee
出处
期刊:Geotechnical Testing Journal
[ASTM International]
日期:2018-07-06
卷期号:42 (1): 64-85
被引量:8
摘要
Abstract Cement-based permeation grouting is utilized in foundations and tunneling projects for waterproofing or ground improvement. The drawback of this method is that, because of the clogging phenomenon, the grout penetration depth is limited in most soil types. In order to overcome this drawback, an oscillatory injection method and equipment were proposed. Laboratory-scale oscillatory grout injection tests were performed with variation of the injection pressure, oscillation frequency, and water-cement (w/c) ratio. The enhancement effect of the groutability was theoretically studied using clogging theory and was assessed according to the Groutability Criterion. The results showed that the grout injection volume and penetration depth were increased by more than 30 % and up to 250 %, respectively, when utilizing the proposed oscillatory injection system. In particular, it was found that the enhancement of the permeation grouting that is due to the oscillatory injection is more dominant with lower injection pressure, oscillation frequency ranges of 5–10 Hz, higher vibration amplitude, and lower w/c ratio.
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