Coupled Grout Flow: Fracture Deformation Effects on Grout Penetration in a Physical Model
Tóm tắt
This paper aims to determine the elastic deformation of slot during the grout penetration. A major parameter considered for evaluating the grout injection quality is the ability of grout penetration in tight or very tight apertures. This research renders an account of the couple hydro-mechanical effect of the grout passage using a steel model. In these tests, piston grout injection pump and grout volumes have been used on the field scale. The tests results show that the initial penetration of the grout gives rise to the elastic deformation of the slot and improvement of the grout passage in the very narrow cracks of 30, 20 and 10 microns. The study results show that the ratios of opening to the cement grains (K) (less than 2) can be injected, which is a step forward in the penetration of the cement grouts. Besides, measurements have indicated that the grout quality decreases with grout filtering over time, and the grout density decreases on account of the participation of the cement grains in the formation of the grout cake.
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