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http://dx.doi.org/10.7843/kgs.2022.38.5.47

Consideration of Engineering Strength and Filling Characteristics for Rubble-Ground Modification Method with Grout Injection  

Kim, Hyeong-Ki (Dept. of Architectural Engrg., Chosun Univ.)
Han, Jin-Gyu (Chemius Korea Co. Ltd.)
Kim, Jeong Eun (Dept. of Architectural Engrg., Chosun Univ.)
Ryu, Yong-Sun (Chemius Korea Co. Ltd.)
Nguyen, Anh Dan (Dept. of Civil Engrg., Chonnam National Univ.)
Kang, Gyeong-O (Dept. of Civil Engrg., Gwangju Univ.)
Kim, Young-Sang (Dept. of Civil Engrg., Chonnam National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.38, no.5, 2022 , pp. 47-59 More about this Journal
Abstract
A series of experiments were performed to investigate the design and application of a rubble-ground modification method with grout injection. A small-sized injection machine was designed, and the grouts with various mix proportions were injected into 25 mm aggregate using the designed small-sized injection machine. With the compressive strength of the grout ranging from 20 to 80 MPa, the uniaxial compressive strength of the grout-filling bodies with clean gravels was higher than 1/6th of the strength of grouts themselves. However, this fraction may reduce depending on the interface conditions. The erosion resistance of the hardened grout was evaluated, and it was determined that the grout with a strength greater than 15 MPa did not require erosion consideration. Moreover, a full-scale injection test was performed for 25 cm-sized rubbles in cages with a diameter greater than 1 m and a height of 1.2 m to evaluate the filling characteristics of the grout. Results from this test indicated that the grout flowability sensitively influenced the filling characteristics.
Keywords
Engineering strength; Erosion; Filling characteristics; Ground modification; Grout;
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Times Cited By KSCI : 1  (Citation Analysis)
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