Share pressure slurry grouting technology of railway Bridges

Pressure of railway Bridges and slurry grouting process: 1, before grouting, should remove impurities and water in the beam body hole. 2, the slurry pressure into the beam body channel before, should first open grouting pump, so that the slurry grouting mouth out a little, to eliminate grouting pipe of air, water and slurry. When the discharge of slurry fluidity and fluidity of mixing tank, pressure into the beam body channel could be performed. 3, the maximal pressure grouting should not be more than 0. 6MPa。 Should reach the duct grouting filling degrees and in the other end full vent discharge the same as the regulations on fluidity of cement paste. After pulp out closed mouth, should maintain not less than 0. 5 mpa and the regulated period of not less than 3 min. 4, for continuous beam or pressure filling pulp, internal waters - make pipes Pulp slurry from the outlet flow freely. Slurry pump again, until the outlet has a homogeneous slurry flow, 0. Under the pressure of 5 mpa pressure maintaining 5 min. This process should be repeated 1 - 2 times. 5 pulp out, should from the anchor plate after grouting pressure check hole grouting dense situation, if there are any false, should be timely to fill irrigation, to ensure the hole completely solid. 6, if choose vacuum aided grouting process, grouting before should first in vacuum, the vacuum stability in - in the channel 0. 06MPa～- 0. 08 between mpa. After vacuum stability, should immediately open valve pipe grouting end, at the same time open the continuous grouting grouting pump. 7, grouting sequence, after the first one and the same pipe grouting should be continuous, at one time. From the slurry mixing to the pumped beam body time should not be more than 40 min. 8, grouting process, the standard curing test pieces shall be made for the three beams group ( 40毫米×40毫米×160毫米) , the compressive strength and flexural strength test. And the grouting for recording. Record the project should include: date of grouting materials, mixture ratio, grouting, the mixing time, fluidity, slurry temperature, environment temperature, pressure and time, ( Vacuum degree) And the grouting, head of supervision engineer, etc. Above is zhengde railway bridge building materials to share pressure slurry grouting process, hope I can help to you, have a need to know more friends, can enter our website or call advisory!

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