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Quick-hardening grout composition for multi-step grouting reinforcement with steel pipe and multi-step grouting reinforcement method using the same
Quick-hardening grout composition for multi-step grouting reinforcement with steel pipe and multi-step grouting reinforcement method using the same
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机译：用相同的钢管和多步灌浆加固方法进行多步灌浆加固的快速硬化灌浆组合物
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摘要
The present invention relates to the steps of drilling the ground of the tunnel to be reinforced (S10), inserting a steel pipe into the drilling (S20), filling a sealing material between the steel pipe and the perforation (S30), and the filled sealing material is gelled. Steel pipe multi-stage grouting method comprising the step (S40), filling the main injection material including the injection material and the quick-setting material with the steel pipe inserted into the perforation (S50) and curing the filled main injection material (S60) as a fast-setting grout composition for use; The sealing material includes a sealing binder and mixing water at a water-cement ratio (W/C) of 1.1 to 1.3, wherein the sealing binder is 30 to 60 wt% of bentonite, 20 to 50 wt% of paper sludge incineration material, 10 to gypsum 30% by weight, 1 to 20% by weight of slaked lime, 0.01 to 5% by weight of a high fluidizer, and 0.01 to 5% by weight of a curing accelerator; The main injection material is to include an injection material and a quick-setting material in a weight ratio of 1: 0.8 to 1; The injection material includes a binder for injection and a compounding water at a water-cement ratio (W/C) of 1.1 to 1.3, wherein the binder for injection is 40 to 70% by weight of micro cement, 5 to 30% by weight of calcium sulfoaluminate, ply 5 to 30% by weight of ash, 5 to 30% by weight of slag cement, 0.01 to 5% by weight of a high fluidizer and 0.01 to 5% by weight of a retarder; The quick-setting material includes a water-cement ratio (W/C) of 1.1 to 1.3 and a quick-setting binder and compounding water, wherein the quick-setting binder is 40 to 70% by weight of gypsum, 5 to 30% by weight of calcium aluminate, C12A7 5 to 30% by weight, 5 to 30% by weight of blast furnace slag, 0.05 to 5% by weight of sodium hydrogen carbonate, 0.01 to 5% by weight of a high fluidizer, and 0.01 to 5% by weight of a curing accelerator; Including a sealing material with a vicart needle penetration of 10 mm or less for 3 hours and a main injection material that can develop an early compressive strength of at least 2 MPa within 2 hours, it maximizes the reinforcing effect of soft ground and tunnels and dramatically shortens the total construction time. It relates to a fast-hardening grout composition for a multi-stage grouting method for steel pipes and a multi-stage grouting method for steel pipes using the same.
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