Study on the Effect of Blanket Grouting

Abstract

Blanket grouting tests were carried out at the cut-slope in order to consider the grouting mechanism and its effect. Geotechnical investigation such as geotomography, borehole television, etc., were introduced as well as or-dinary measurements of grouting performance.
The results are summarized as follows:
·The flowing direction of paste is controled by orientation of fractured zones, seams and joints together with the gravity action.
·Continuous joints and small joints connected with together are injected at the begining stage of grouting, and then small joints filled up gradually.
·Seismic-and resistivity-tomography help effectively to grasp the state of the rock mass being injected, offering informations, qualitatively and quantitavely.