Plugging grouting construction plan

Waterproof plugging engineering of high pressure grouting construction scheme, compilation basis, 1. Technical specification for the engineering of waterproof GB50108 - 2001; 2. The acceptance of waterproof engineering GB50208 - 2002; 3. The rules and regulations of the state of the current relevant as well as the company years of experience in waterproof plugging. Second, the material selection using high pressure grouting treatment method of the water plugging, used oil foaming polyurethane. Oily pu rapid plugging gel reaction with water, because water involved in the reaction, the slurry will not dilute washed away by water. Slurry under the effect of pressure, pumping concrete crevices or holes, at the same time around the crack penetration, continue to penetrate into the concrete crack, eventually form a mesh structure, formation density is small, hydrous elastomers, have good ability to adapt to the variant, check good water. Three, grouting concrete operation scheme. Grouting construction process to determine waterproof plugging scheme to crack surface treatment, embedding grouting hole and joint sealing to seal check to configure slurry, grouting, check and seal over 1. Determine waterproof plugging scene investigation must be conducted before, clear site construction conditions, this paper analyzes the reasons of water seepage, find out leakage area, cracks, or perforation length, width, depth and throughout. 2. Surface treatment to remove cracks on the surface of the dust and dirt scum and loose bed, and then use the brush dipped in alcohol, acetone and other organic solvents, on both sides of the crack 30 ~ 50 mm scrubbed clean and dry. 3. Embedding grouting hole (1) the design of grouting hole and cloth hole grouting hole hole has the place and inclined holes in two forms, according to the actual situation and needs to be choose, when necessary and use both. 1 the design of grouting hole, grouting hole position, should make holes and leakage crack space intersection, maximize and calculate the water leakage. 2 holes arrangement principle: the location and quantity of grouting hole, carry on the reasonable arrangement, according to the different leakage situation for the purpose of leaking everywhere, in the concentrated leakage holes, cracks, the pitch of water flow is big, small aperture small pitch. (2) the stiletto visual construction conditions using manual and mechanical methods, generally is craft punch and mechanical drilling and used. ③。 Embedding grouting mouth in the intersections, wide, end cracks through embedding grouting hole. Embedding distance: short slit is 300 ~ 500 mm; Long slot for 500 ~ 800 mm. In grouting mouth before embedding, apply a layer of about 2 mm thick at the bottom of the structure of the rubber paste mouth into the slurry grouting hole place at a predetermined position. 4. Joint sealing with adhesive joint sealing structure, along the fissures, Cracks in 30 ~ 50 mm on both sides with a layer of about 1 ~ 2 mm thick structural adhesive. Apply glue should prevent holes and bubble, to level off, guarantee the sealing is reliable. 5. Seal check after fracture closed air leakage, check the sealing effect. Leak test must be structural adhesive have a certain strength. 6. Configure the formulation and preparation of slurry field according to the different pulp material mix epoxy grout method. Serum a dispensing quantity, should be carried out with serous solidification time into the slurry to determine the speed. 7. Grouting grouting is the key to the construction process, should ensure that the grouting quality: 1 filling machines, equipment and pipe should be checked before grouting, running normally before using. On line, open all grouting mouth valve, clean with compressed air blowing hole and cracks. Check the workings of the grouting equipment and piping: check the strength of the filling pulp mouth, dredge cracks, further set good grouting parameters ( Such as gel time, grouting pressure and proportioning quantity 2 according to the crack area size, can use single-hole grouting hole grouting or partition group. To conduct a comprehensive inspection of the whole system before grouting, the grouting machine working normally, under the condition of pipe flow, before grouting. To the vertical seam grouting from bottom to top, in general level of seam grouting from one end to the other side. 3 when grouting should be the next pulp out exhaust nozzle immediately shut off the valve core, so order. Chemical liquid grouting pressure is usually 0. 2 to 0. 4MPa。 End grouting: under the condition of the pressure is stable, continue to pour 1 to 2 minutes end grouting, remove the line to clean. 8. Check and inside seam sealing end for slurry reach initial setting and not outflow, through inspection without slack phenomenon, can knock down grouting mouth, reoccupy cement sealing structure, using materials such as cement mortar hole filling-in finishing. Four, note 1 slurry pipe must have sufficient strength, convenient installation. 2 all operators must wear the necessary labor protection articles. 3, grouting pump to operating personnel should be aware of slurry pumping quantity, at the same time to observe the changes of pressure. General sudden high pressure may be serous solidification, pipe blockage, or due to slurry gradually fill the gaps, to immediately stop grouting at this time. Pressure stable rise, but still within a certain pressure, at this time is normal. Sometimes a drop in pressure, pore is made, this may be due to slurry into the gap caused by deep in great quantities, sustainable grouting at this time. As a large number of grout into the gap, pressure will gradually rise and stability. Pressure to reduce the another reason is caused by joint sealing goods pipe joint leak slurry, shall immediately stop the grouting, for processing. The grout pressure due to the pump pressure, sometimes deep into the gaps, make a lot of slurry erosion, adjustable slurry consolidation time at this moment, to shorten the setting time or intermittent grouting method is used to reduce serum losses. 4 grouting used in the equipment, piping and VAT must be marked, respectively. 5 should be prepared before grouting cement and sodium silicate plugging material quickly, so that timely treatment to run pulp slurry. 6 every time after the grouting, should be timely clean all equipment and piping, after the grouting should be adopted 12 closed grouting cement mortar hole.