Tunnel waterproof plate construction seam waterproof treatment scheme

China Paint Online News Information: The waterproof constructiontunnel includes tunnel lining anti-draining measures; Drainage blind construction; Waterproof plate construction seam waterproof treatment program, tunnel waterproofing is an important link of tunnel construction quality is also a complex operation process, construction difficult links, has always been paid attention to. Therefore, the waterproof construction of each project tunnel should adopt the principle of comprehensive management according to this scheme and according to local hydrogeological conditions. To achieve smooth drainage, waterproof and reliable, economical and reasonable construction program.。 1. Waterproof layer laying
waterproof plate in the hole outside the wide, flat site cutting material, using double welding machine welding into a frame, the car transported to the hole, through the waterproof plate work bench, the use of nailless hole laying process.
Waterproof layer before laying to remove the initial support surface of the exposed anchor rod head, and with mortar to wrap it, for uneven places with mortar flat, through the waterproof plate work frame from the arch to the sides in turn fixed non-woven, waterproof plate. During construction, the nonwovens are fixed by cement nails through PVC gaskets, and then the PVC waterproof plate and PVC gasket are welded firmly by hot air welding.
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1.1, fixed waterproof plate, should be depending on the flatness of the spray anchor support surface will be a certain amount of water resistance reserved, in order to prevent too tight and squeezed.
1.2, in order to make the waterproof plate joint welding well, waterproof plate per ring laying length should be 0.5 to 1.0m longer than the lining length to help the joint welding construction.
1.3, waterproof plate seams and lining construction seams should be staggered 0.5 to 1.0m is appropriate.
1.4, waterproof plate laid, as soon as possible perfusion
1.5, soft rock lot lining closely follow the excavation surface, lining end reserved waterproof plate joint must take protective measures to prevent the palm surface blasting, flying stone smashed the waterproof plate.
1.6, lining reinforced rebar installation, a variety of pre-buried parts settings, bezel template installation, as well as pumping crucibles and other processes to prevent damage to the waterproof plate.waterproof plate laying process
2. soft permeable pipe blind ditch
soft permeable pipe processing material should consider the length of the fitting reserved to ensure that the ring blind pipe at both ends can fully enter the vertical blind ditch; The permeable pipe is in close contact with the surface of the sprayed concrete, and maintains a certain degree of relaxation, which should not be pulled too tightly; The exposed anchor nail of the fixed permeable pipe shall be removed or smoothed with mortar to prevent puncture of the waterproof plate; In the construction, we should do a good job of permeable pipe joint treatment, to prevent debris from entering the pipe.
3. Structural seam waterproof in the tunnel ring, vertical construction seam and subsiding seam, is often the weak link of structural waterproofing, construction, in the structure seam between the waterproof plate and two-lined concrete affable PVC water stop belt, to enhance its waterproofing capacity. Concrete pouring should pay attention to the butt seams of the mashing, so that it is dense, and not to destroy the water stop belt or make the water stop belt misplaced.
4. Other auxiliary waterproof measures
When the tunnel excavation after the local leakage point, the use of buried hard plastic pipe method to drain water into the water leak hole at the side wall, the water is larger first by using the slurry method to seal, the water volume becomes smaller and concentrated for drainage treatment. For large areas of leakage, large drainage plates are used for drainage. An MF7 plastic blind trench is set up under the road surface for drainage every 50m, and when concentrated groundwater appears at the bottom of the tunnel.
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