Construction method for restoration of secondary hole excavation in constructed roof for pipeline penetration

Abstract

The invention discloses a construction method for restoration of secondary hole excavation in a constructed roof for pipeline penetration. The constructed roof comprises a waterproof roll layer, an insulation board layer and a concrete layer which are arranged on a structural roof board from bottom to top. The construction method includes: excavating a penetrating pipeline hole in the constructed roof and inserting a pipeline into the pipeline hole; chiseling the constructed roof circumferentially by centering on the pipeline and chiseling till the waterproof roll layer is reached so as to form a chiseling area; brushing waterproof paint on the surface, exposed over the chiseling area, of the pipeline and the surface of the waterproof roll layer in the chiseling area; pouring concrete in the chiseling area and vibrating to allow the concrete to be compact. The construction method has the advantage that reaction sticky waterproof rolls are paved on the pipeline in the secondary hole and the waterproof roll layer in the chiseling area, and the concrete is poured in the chiseling area and vibrated to be compact, so that good waterproof effect can be achieved.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a construction method for repairing by opening holes and piercing pipes after the roof has been constructed. Background technique [0002] In some construction projects in the prior art, due to reasons such as changes in design schemes, pipes must pass through the roof that has been constructed, and holes must be opened behind the roof again, and the secondary openings are repaired. Since the waterproofing, thermal insulation and rigid layers of the roof have all been constructed at this time, the fire-fighting water pipes are drilled a second time on the formed roof slab, which poses a great risk of water leakage. In addition, because the pipe wall and concrete are not of the same material, and the compatibility is poor, there is temperature stress, and the vicinity of the pipe mouth is very easy to crack, which has always been a technical difficulty in roof waterproofing...

AI Technical Summary

Problems solved by technology

When waterproofing membranes are used for roof waterproofing construction, the waterproofing membranes cannot be closed with coiled materials at this part, and can only be closed with waterproof paint or building sealant, which is prone to cracking under the influence of temperature stress and aging factors

When waterproof coating is used as roof waterproof construction, the waterproof coating must be protected with cement mortar after construction. Generally, the thickness of the mortar protective layer is 20mm to 30mm. It is more likely to crack when using mortar to close the drain, and even destroy the original waterproofing. layer, causing leakage

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