Inconsistent reason analysis to solve in the process of tunnel grouting

In the process of grouting hole grouting construction of incoherent would happen, this kind of situation is how to form? A, discontinuous causes causes the grouting process there are two reasons: ( 1) , the number of slurry to inadequate preparation. ( 2) , mechanical equipment failure, no backup device. Two, hazard analysis grouting process was halted, secondary grouting is needed, such as direct from the original grouting grouting mouth, see the pulp mouth has come up to think hole grouting slurry has been filled, pulp out close mouth, actually this channel in memory and no discharge air, residues in the range of the pore forming a long gap, namely the duct grouting is close-grained, not cause harmful material easily into the pipe of prestressed steel bar corrosion. Three, the prevention and control measures for prevention and control measures of grouting discontinuous problems are ( 1) , correctly estimate the dosage of slurry, in the actual construction should fully consider the vent, secrete water pipes, and slurry loss of slurry. ( 2) , pay attention to the mechanical equipment maintenance and maintenance, and the backup device. ( 3) , once appear, the interruption of grouting, grouting, should be changed in the second grouting into the mouth, the channel of the pulp volume, the first grouting mouth pumping slurry and gases between grouting completely, to ensure the density of epoxy grout.