Grouting pipe grouting agent steps

grouting pipe grouting agent steps (1) slurry pressure into the beam body channel before, should first open grouting pump, slurry from grouting mouth out a little, to eliminate grouting pipe in the air, water and slurry. When the discharge of slurry fluidity and fluidity of mixing tank, pressure into the beam body channel could be performed. (2) the grouting, the curve of the concreted complete vertical channel should be low pore pressure grouting into; Above a layered set of structure or component of channel, should press the lower before the upper sequence of grouting. The same hole grouting should be continuous, at one time. Grouting should be slow. Evenly, without interruption, and should be vent all the peak, in turn, open and close, make the pore exhaust flow. (3) slurry mixing finish to the continuation of pressure into the channel time shoulds not be more than 40 min, and before use and injection process should be continuous stirring, for because of the delay caused by using slurry fluidity decrease, not through additional add water to increase its fluidity. (4) for horizontal hole or curve, grouting pressure should be 0. 5 to 0. 7MPa; For super long tunnel, the maximum pressure should not be more than 1. 0MPa; The vertical channel of grouting pressure should be 0. 3 to 0. 4MPa。 Grouting filling degree should reach the hole and the other end of the full vent discharge the same as the regulations on fluidity of cement slurry, pulp out close mouth, should maintain a is not less than 0. 5 mpa voltage phase, the phase voltage keep the appropriate time for 3 ~ 5 min. (5) using vacuum aided grouting process, grouting in dealing with the channel before vacuum, vacuum degree should be stable in - 0. 06 ~ - 0. Within 10 mpa. After vacuum stability, should immediately open hole grouting of the valve, at the same time start the continuous grouting grouting pump. 6 pipe grouting, grouting agent each working class should be made to return of not less than 3 group size of 40 mm x 40 mm x 160 mm of sample, standard curing 28 d, compressive strength and flexural strength test, as a basis to assess the quality of cement slurry. All landowners 48 h after grouting process and grouting, structure or component of concrete temperature and environment shall not be lower than 5 ℃, otherwise the heat preservation measures should be taken, and should be dealt with according to the requirement of the winter construction, pipe grouting agent can use a moderate amount of mixing air-entraining agent in the slurry, but shall not be mixed with antifreeze. When the environment temperature above 35 ℃, grouting should be in the night. Today should be through the inspection hole after grouting grouting selectiving examination of dense, if there are any false, should be timely to the plasma processing. Pet-name ruby pipe grouting agent construction record should be filled in. Record should include: date of grouting materials, mixture ratio, grouting, the mixing time, initial fluidity and pressure of slurry temperature, environment temperature, voltage and time, the vacuum aided grouting process should include vacuum fashion.