Double-fluid grouting construction method for tunnel construction
A technology of tunnel construction and construction method, which is applied in the direction of tunnel, tunnel lining, earthwork drilling and mining, etc. It can solve the problems of double liquid slurry waste, long time of double liquid slurry consolidation, and failure to achieve the expected effect, so as to shorten the setting time, Effects of preventing clogging and reducing waste
Active Publication Date: 2019-10-25
THE QINGDAO ENG CO LTD OF CHINA RAILWAY NO 10 ENG GRP CO LTD
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Problems solved by technology
[0004] When constructing in the tunnel geology of fully weathered quartzite, water-rich and weak surrounding rock, the soil layer is saturated with water, the water seepage area is wide, and it is in the shape of soft plastic-flow plastic, with many voids. Flow away with the gap, resulting in waste of double-liquid grout and can not achieve the expected effect; therefore, it is necessary to design a construction method of double-liquid grouting for tunnel construction with a faster setting time of double-liquid grout
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Embodiment 1
[0028] Embodiment 1: a kind of double liquid grouting construction method for tunnel construction, comprises the following steps:
[0029] (1) Prepare and check equipment: move the equipment according to the ground conditions to be constructed, and check whether the equipment is operating normally;
[0030] (2) Drilling holes on the surface: use a water drilling machine to drill holes and make the grouting holes arranged in a plum blossom shape. When drilling the outermost grouting holes, the drilling angle should be 9-11°, and Drainage ditches shall be dug; the diameter of the grouting holes shall be 0.42m, the distance between two adjacent grouting holes shall be 0.35m, and the maximum deviation of hole positions shall be 0.05m; the drilling depth shall reach the designed grouting consolidation depth, and the The hole verticality error is less than 0.45%; when the predetermined depth is reached, flush the grouting hole with the maximum pressure and seal the nozzle of the gro...
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The invention discloses a double-liquid slurry grouting construction method for tunnel construction, and relates to the technical field of tunnel construction. According to the technical scheme, the method is characterized by comprising the following steps of: (1) preparing and inspecting equipment; (2) surface drilling; (3) preparing slurry: a first slurry is prepared by uniformly mixing a mixedsolution, cement and a first admixture with a mass ratio of 1:1:0.15; a second slurry is prepared by uniformly mixing a water glass solution, sodium fluorosilicate and a second admixture with a mass ratio of 1:1:0.16; (5) grouting: when the first slurry is injected, the grouting pressure is controlled to be 0.5 to 1.5 MPa, and the grouting flow is 14 to 15 Liters per minute; the second slurry is grouted after the grouting pipe moves back for 1.5 meters, the grouting pressure is controlled to be 0.5-1.5 Mpa and the grouting flow is 13-15L / min. By using the method, the problem that the double-liquid slurry easily runs into the soil layer during the construction process of a fully weathered quartz-rock water-rich soft surrounding rock tunnel is solved, and the effect of rapidly condensing thedouble-liquid slurry and reducing the waste of the double-liquid slurry is achieved.
Description
technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a double-fluid grouting construction method for tunnel construction. Background technique [0002] Double-liquid grouting is to inject water glass and calcium chloride solution into the soil alternately. The two solutions react quickly to form silica gel and calcium silicate gel, which play the role of cementing and filling pores, and improve the strength and bearing capacity of the soil. . [0003] In the prior art, you can refer to the Chinese invention patent document with the authorized announcement number CN105155541B, which discloses a double-slurry sealing construction method for a sump, including the following steps: (1) laying a drilling rig around the grouting position; (2) Preparation of slurry: the first slurry: liquid A, liquid B and the first admixture with a mass ratio of 1:1:0.13; the second slurry: liquid A' and liquid C with a mass ratio of 1:1:0.17...
Claims
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IPC IPC(8): E21D9/00E21D11/10C04B28/26C04B111/70
CPCC04B28/26C04B2111/00724C04B2111/70E21D9/002E21D11/10C04B7/00C04B22/16C04B24/2641C04B24/121C04B22/126C04B22/143C04B22/04C04B22/0093C04B22/00C04B22/148C04B22/087
Inventor 张丛唐孝中郭建李信龙
Owner THE QINGDAO ENG CO LTD OF CHINA RAILWAY NO 10 ENG GRP CO LTD