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Pullout Characteristics of Pressure Reinjection-Grouted Reinforcements in Clay  

Seo, Jungwon ((주)진산이엔지 기술연구소)
Kim, Nara (한국교통대학교 토목공학과)
Lee, Bongjik (한국교통대학교 토목공학과)
Publication Information
Journal of the Korean GEO-environmental Society / v.13, no.9, 2012 , pp. 83-89 More about this Journal
Abstract
Anchor, soil nail and micropile have been widely used for slope reinforcement and foundation. These all methods need grouting work after placing reinforcing member. The pressure injection-grouting techniques helps to increase the bearing capacity of reinforcing member by enhancing larger effective pile diameter and increasing the radial stresses acting on the grout body and causing irregular surface. However, the pressure reinjection-grouting techniques is not commonly used because grouting equipment and practical application example are short and the verification of reinforcing effect is difficult. In this study, the laboratory test was performed to evaluate the reinforcing effect with variation of grouting methods in clay. As a result of the test, the pressure reinjection-grouting techniques showed that the pullout capacity of reinforcing member increased up to 1.22~2.61 times comparing to the gravity fill techniques.
Keywords
Clay; Gravity fill techniques; Pressure reinjection-grouting; Reinforcing effect; Pullout characteristics;
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