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The joint of concrete and flexible waterproof casing pipe wall shall ensure no gap

Time: 05-07 󰃯 Reading times: 872 󰃳 Editor in charge: The sea 󰃗 Column: product focus

Introduction: Treatment of false beam joint and structural joint staggering and curtain hanging treatment of flexible waterproof casing: firstly, remove the slurry leakage caused by staggered platform hanging curtain, and then grind the position of staggered platform. In order to ensure smooth connection between the ground concrete surface and the nearby concrete, the side wall and arch crown of the diversion tunnel shall be connected to the slope

flexibility Waterproof casing In the case of false curtain, the construction of the curtain is first polished, and then the false joint is removed. In order to ensure the smooth connection between the ground concrete surface and the nearby concrete, the side wall and arch top of the diversion tunnel are 1:20 and 1:10 respectively; the connection slope of the bottom plate of the diversion tunnel is 1:30 along the flow direction and 1:10 in the vertical flow direction.
The concrete surface peeling and damaged concrete surface peeling shall be treated by grinding. During grinding, attention shall be paid to smooth transition connection with the surrounding formed concrete until the surface is smooth and smooth. If some shallow pits are found, they can be chiseled after large area polishing and grinding, and the deep layer should be no less than 2cm, and then the epoxy mortar should be used to smooth and compact. Shallow crack treatment and chemical grouting crack treatment are divided into shallow crack and deep crack treatment according to the crack width. For the crack with width less than 0.1 mm, it is proposed to brush the surface with steel wire brush within 20 mm of the crack, then clean the surface with acetone, and then apply a layer of epoxy based liquid for sealing treatment; when the crack width is between 0.1 mm and 0.2 mm, a 80 wide one shall be chiseled along the crack development direction For rectangular groove with a depth of 15mm-30mm, the length of both sides of the groove exceeds the crack length by 30cm, and then the epoxy mortar is used to smooth and compact.
If the crack width is more than 0.3mm and penetrating crack, acetone furfural epoxy paste with good water absorption is proposed to be used for grouting. In order to ensure that there is no mark on the concrete surface after grouting, water glass mortar is used to block the cracks before grouting. That is, the tap water glass infiltrates the cement bag paper or other paper raw materials along the crack surface, presses a layer of sodium silicate mortar on the cement bag paper after soaking, and embeds the grouting nozzle through the seam. The grouting pressure is 0.2-0.3mpa. When the amount of slurry suction tends to 0, the grouting of this hole can be finished and the grouting can be transferred to the next hole. Flexible waterproof casing After the crack grouting treatment, the water glass mortar on the surface shall be eliminated with a flat shovel, and a layer of epoxy based liquid shall be applied to seal the crack surface after grinding.