Abstract
ABSTRACT Zhang, J. and Lu, Z., 2015. A New method for optimal locating of boreholes in rock consolidation works. With respect to the design and construction of grouting and drainage works, the conventional method is to locate the grout hole and drainage hole in the direction perpendicular to the natural rock or excavation surface. The anisotropy of structural planes in leaking water or grout has been neglected in the design of the works. Investigation data about rock fissures are studied to find out the distribution law of structural planes and know how to best locate boreholes with respect to structural planes in order to get an optimum effect of grouting and drainage. A new method is put forward for locating grout holes and bore holes. The practice from the Houhe Reservoir shows the inclined borehole less than 75° has an obvious efficiency, and among the boreholes within the angle range of 65 to 75, the optimum locations have an average efficiency of 2.11.
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