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http://dx.doi.org/10.9711/KTAJ.2021.23.3.151

A proposal and evaluation of a revised GIN method  

Sagong, Myung (Advanced Railroad Civil Engineering Division, Korea Railroad Research Institute)
Park, Youngjin (Saman Corporation)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.23, no.3, 2021 , pp. 151-165 More about this Journal
Abstract
Grouting, which is applied for the increase of ground strength and the decrease of permeability, is complex process because of several reasons, so the process needs to be elaborated. Injection process in consideration of ground condition and optimization of grouting sequence is essential. In this study, GIN (Grouting Intensity Number), multiple of injected grout volume and pressure, is revised to consider injection pressure reduction and joint opening during grouting process. A revised GIN process is evaluated through a field test. A revised GIN, considering ground condition, injection pressure, follows GIN envelope and produces rational grouting process. The result of a revised GIN reduces permeability of the ground in the order of 10-1~10-2 cm/sec.
Keywords
Grouting; GIN; Rock joint; Frictional resistance; Joint opening;
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