Construction method for pre-buried drainage pipe structure on large roof
By burying the drain pipe before pouring the concrete on the roof of a large industrial factory, and expanding the waterproof layer to the outside of the drain pipe, the water seepage problems caused by water leakage at the drain outlet and independent application of the waterproof layer in traditional construction are solved, and the integrated coverage of the roof waterproofing is achieved.
Patent Information
- Application Number
- CN202510011471.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-04
- Publication Date
- 2025-03-18
AI Technical Summary
In the construction process of pre-embedded drain pipes on the roof surface of large industrial plants, there are water leakage at the drain outlet, high-incidence leakage hazards, and water seepage problems caused by independent application of waterproof layer and structural layer.
By directly burying the drainage pipe at one time before pouring the concrete of the daughter wall, and expanding the waterproof layer to the pipe opening on the outside of the drainage pipe, the rainwater on the roof is directly discharged into the rainwater system outside the daughter wall, forming a complete waterproof whole.
The hidden danger of water leakage on the roof surface is completely solved, and the gaps formed by post-repair concrete shrinkage are avoided as a hidden danger of water leakage, and the integrated coverage of the waterproof layer on the roof surface is achieved.
Smart Images
Figure CN119641032A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a roof surface of a large industrial plant, and in particular to a pre-buried drainage pipe structure on the large roof and a construction method thereof. Background Art
[0002] The roof of a large industrial plant is generally designed as a flat roof. A parapet is set around the outer wall of the roof. A drainage pipe is set at the root of the parapet. The existing technical method of constructing the drainage pipe is: when the parapet concrete pouring formwork is supported, a box formwork that can form a drainage hole is pre-embedded and fixed between the vertical steel bars in the parapet wall. When the parapet concrete pouring formwork is supported, it is hidden and clamped therein. After the formwork support and reinforcement are completed, the concrete of the parapet is poured. After the concrete solidifies, the parapet is removed. The template and the box template form a reserved hole for roof drainage at the root of the parapet. Then, a large-area roof surface leveling layer, insulation layer, and slope layer are applied, and a water outlet pipe is installed in the reserved drainage hole on the roof surface, and then the water outlet pipe is sealed with fine stone concrete; finally, a waterproof layer is applied on the roof surface. The existing technology for applying the waterproof layer is generally to form a roof surface waterproof layer by laying a waterproof membrane on the leveling layer. The waterproof membrane on the roof surface is generally laid to the inner side of the parapet wall drainage pipe. There is a joint gap between the inner port of the drain pipe, which is a key hidden danger of roof water seepage. In order to overcome the water seepage defect of the joint gap, technical personnel in this field have tried to overcome this defect through various technical measures, but the following defects still exist: (1) After the drain pipe is inserted into the hole of the existing parapet reserved for the drain pipe, the fine stone concrete sealing part of the gap around the pipe is prone to become a high-incidence point of roof water seepage. The existing construction process of the reserved hole cannot fundamentally solve the problem of water seepage at the drain outlet; (2) The lag in the reserved hole The construction process for installing the drainage pipe, as well as the independent construction processes of the drainage pipe, the parapet structure layer of the roof surface and the waterproof layer on the roof surface, make the drainage pipe and the structural waterproof layer form two skins, which directly causes the hidden danger of water seepage at the connection point; (3) The traditional process is to apply the leveling layer, insulation layer, slope layer, and leveling layer on the roof surface in sequence, then install the drainage pipe, and then apply the waterproof layer and the waterproof protective layer. This process is based on the structural layer for construction, and does not raise water seepage prevention to the most important position of the construction of each structural layer on the roof surface. Summary of the invention
[0003] The invention provides a method for constructing a pre-buried drainage pipe structure on a large roof, which solves the technical problem that the construction of a traditional roof surface drainage and waterproof layer is based on a structural layer and is prone to water leakage.
[0004] The present invention solves the above technical problems through the following technical solutions: The overall concept of the present invention is: to change the traditional process of taking the roof structure layer as the basis for the construction of the roof surface, and to use waterproofing to guide the construction of each structural layer of the roof surface; to directly embed and install the drainage pipe in the parapet wall formwork system before pouring the parapet wall concrete, so that the drainage pipe forms a complete whole with the concrete parapet wall after the concrete is poured, avoiding the traditional practice of leaving a hole first and then installing the drainage pipe, resulting in an annular gap formed around the drainage pipe and the hole, which needs to be sealed twice, and avoiding the gap formed by the shrinkage of the later-filled concrete from becoming a hidden danger of water leakage at the root of the parapet wall; the roof surface waterproof layer is extended and paved to the outer pipe mouth of the drainage pipe, so that the rainwater on the roof surface can be directly discharged into the rainwater system outside the parapet wall through the integrated waterproof layer of the roof surface, which completely solves the hidden danger of easy water leakage at the root of the roof parapet wall outlet pipe.
[0005] The roof surface drainage pipe structure with integrated anti-seepage treatment includes a main roof structure, an inner template for casting parapet concrete and an outer template for casting parapet concrete are arranged on the main roof structure, pre-buried steel bars in the parapet wall are arranged between the inner template and the outer template, a pre-buried drainage pipe is connected to the pre-buried steel bars in the parapet wall, the inner port of the pre-buried drainage pipe is top-connected to the inner facade of the inner template, and the outer port of the pre-buried drainage pipe passes through the outer template and is cantilevered on the outer side of the main roof structure; on the inner template Parapet concrete is poured between the outer formwork; when the parapet concrete solidifies and the inner and outer formworks are removed, a waterproof waistline is formed on the inner facade of the parapet, and on the roof structure layer of the main roof structure on the inner side of the parapet, a roof structure leveling layer, a roof insulation layer, a roof slope layer, a waterproof leveling layer and a waterproof protective layer are arranged in sequence from bottom to top. The waterproof protective layer continues into the inner cavity of the embedded drainage pipe, and is turned outward on the water outlet of the embedded drainage pipe and is clamped and fixed by a clamp.
[0006] The waterproof protective layer extending into the inner cavity of the embedded drainage pipe is integrated along the inner cavity side wall of the embedded drainage pipe, and is integrated with the waterproof layer on the inner wall of the parapet wall below the waterproof waistline.
[0007] A water stop wing ring is arranged on the outer side wall of the embedded drainage pipe embedded in the concrete of the parapet wall; a waterproof layer protection surface layer is arranged on the waterproof protection layer on the inner side of the water inlet of the embedded drainage pipe.
[0008] A method for constructing a pre-buried drainage pipe structure on a large roof comprises the following steps: The first step is to set the embedded steel bars in the parapet wall on the main structure of the roof, and then set up the inner formwork and outer formwork for pouring the parapet concrete; The second step is to position and tie the embedded drainage pipe to the embedded steel bars in the parapet wall, so that the inner port of the embedded drainage pipe is connected to the inner facade of the inner formwork, and the outer port of the embedded drainage pipe passes through the outer formwork and cantilevers on the outside of the main structure of the roof; The third step is to pour the parapet concrete. After the poured concrete solidifies, remove the inner and outer formworks, so that the embedded drainage pipe and the parapet concrete form a whole. Step 4: Taking the inner port of the embedded drainage pipe as the reference, set the roof structure leveling layer, roof insulation layer, roof slope layer and waterproof leveling layer on the roof surface in sequence, so that the inner port of the embedded drainage pipe is at the lowest drainage point on the roof surface; Step 5: Apply a waterproof protective layer on the waterproof leveling layer, extend the waterproof protective layer into the inner cavity of the pre-buried drainage pipe, and then turn it outward on the water outlet of the pre-buried drainage pipe and fix it with a clamp, so that the waterproof protective layer on the roof surface and the waterproof protective layer in the inner cavity of the pre-buried drainage pipe form an integral waterproof layer structure without gaps; Step 6: construct a waterproof layer on the inner wall of the parapet below the waterproof waistline, and integrate the waterproof layer on the inner wall of the parapet, the waterproof protective layer and the waterproof layer of the inner cavity of the embedded drainage pipe; Step 7. Apply a waterproof protective layer on the waterproof protective layer on the roof surface so that the top surface of the waterproof protective layer and the lowest point of the waterproof protective layer in the inner cavity of the embedded drainage pipe are set on the same slope.
[0009] The waterproof protective layer is formed by laying waterproof membrane.
[0010] The present invention directly embeds a drainage pipe in the concrete pouring of the roof parapet, and integrates the roof waterproof layer into the drainage pipe, so that the waterproof layer on the inner side facade of the parapet, the waterproof layer on the roof surface and the waterproof layer in the drainage pipe are seamlessly connected to form a waterproof layer as a whole, which completely solves the hidden danger of roof leakage. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a connection relationship diagram between the embedded drainage pipe 5 of the present invention and the parapet wall concrete casting template. DETAILED DESCRIPTION
[0012] The present invention is described in detail below in conjunction with the accompanying drawings: The roof surface drainage pipe structure with integrated anti-seepage treatment comprises a roof main structure 1, an inner formwork 2 for casting parapet concrete and an outer formwork 3 for casting parapet concrete are arranged on the roof main structure 1, a parapet wall embedded steel bar 4 is arranged between the inner formwork 2 and the outer formwork 3, a embedded drainage pipe 5 for roof surface drainage is connected to the embedded steel bar 4 in the parapet wall, the inner port of the embedded drainage pipe 5 is top-connected to the inner facade of the inner formwork 2, and the outer port of the embedded drainage pipe 5 passes through the outer formwork 3 and then cantilevers out of the outer side of the roof main structure 1; a parapet wall concrete 6 is cast between the inner formwork 2 and the outer formwork 3, so that the embedded drainage pipe 5 and the parapet wall cast concrete are combined into a whole, thereby changing In order to reserve a hole for installing the drainage pipe in advance, the drainage pipe will be installed later, and the gap between the hole and the drainage pipe needs to be filled, thus leaving a hidden danger of water leakage; when the parapet concrete 6 solidifies, the inner formwork 2 and the outer formwork 3 are removed, and the embedded drainage pipe 5 is embedded in the root of the parapet in advance, and a waterproof waistline 7 is formed on the inner facade of the parapet. On the roof structure layer of the roof main structure 1 on the inner side of the parapet, a roof structure leveling layer 8, a roof insulation layer 9, a roof slope layer 10, a waterproof leveling layer 11 and a waterproof protective layer 12 are arranged in sequence from bottom to top. The waterproof protective layer 12 continues into the inner cavity of the embedded drainage pipe 5, and is turned outward on the water outlet of the embedded drainage pipe 5 and is clamped and fixed by a clamp 13.
[0013] The waterproof protective layer that continues into the inner cavity of the embedded drainage pipe 5 is integrally arranged along the side wall of the inner cavity of the embedded drainage pipe 5, and is integrally connected with the waterproof layer 14 on the inner wall of the parapet arranged below the waterproof waistline 7; the waterproof protective layer 12 in the inner cavity of the embedded drainage pipe 5 and the waterproof protective layer 12 on the roof surface, as well as the waterproof layer 14 on the inner wall of the parapet below the waterproof waistline 7 form a seamless waterproof whole, so that rainwater on the roof enters the inner cavity of the embedded drainage pipe 5 along the roof slope, and is directly discharged into the drainage riser arranged on the outside of the roof main structure 1, eliminating the existence of construction gaps in the traditional waterproof layer and realizing the overall coverage of the waterproof layer on the roof surface.
[0014] A water-stop wing ring 15 is arranged on the outer wall of the embedded drainage pipe 5 embedded in the parapet concrete to prevent water from seeping into the roof surface from the outer wall of the parapet; a waterproof layer protective layer 16 is arranged on the waterproof protective layer 12 on the inner side of the water inlet of the embedded drainage pipe 5, and the waterproof layer protective layer 16 is a mortar layer, which plays a role in protecting the waterproof protective layer.
[0015] A method for constructing a pre-buried drainage pipe structure on a large roof comprises the following steps: The first step is to set the embedded steel bars 4 in the parapet wall on the main roof structure 1, and then set up the inner formwork 2 for pouring the parapet concrete and the outer formwork 3 for pouring the parapet concrete; The second step is to position and tie the embedded drainage pipe 5 to the embedded steel bars 4 in the parapet wall, so that the inner port of the embedded drainage pipe 5 is connected to the inner facade of the inner formwork 2, and the outer port of the embedded drainage pipe 5 passes through the outer formwork 3 and is cantilevered on the outer side of the roof main structure 1; The third step is to pour the parapet concrete. After the poured concrete solidifies, the inner formwork 2 and the outer formwork 3 are removed, so that the embedded drainage pipe 5 and the parapet concrete form a whole; The fourth step is to sequentially set the roof structure leveling layer 8, the roof insulation layer 9, the roof slope layer 10 and the waterproof leveling layer 11 on the roof surface with the inner port of the pre-buried drain pipe 5 as the reference, so that the inner port of the pre-buried drain pipe 5 is at the lowest drainage point of the roof surface; Step 5: Apply a waterproof protective layer 12 on the waterproof leveling layer 11, and extend the waterproof protective layer 12 into the inner cavity of the pre-buried drain pipe 5, and then turn it outward on the water outlet of the pre-buried drain pipe 5 and fix it by the clamp 13, so that the waterproof protective layer 12 on the roof surface and the waterproof protective layer in the inner cavity of the pre-buried drain pipe 5 form an integral waterproof layer structure without gaps; Step 6: construct a waterproof layer 14 on the inner wall of the parapet below the waterproof waistline 7, and integrate the waterproof layer 14 on the inner wall of the parapet, the waterproof protective layer 12 and the waterproof layer of the inner cavity of the embedded drainage pipe 5; Step 7: Apply a waterproof layer protection layer 16 on the waterproof protection layer 12 on the roof surface, so that the top surface of the waterproof layer protection layer 16 and the lowest point of the waterproof protection layer in the inner cavity of the pre-buried drainage pipe 5 are arranged on the same slope.
[0016] The waterproof protective layer 12 is formed by laying a waterproof roll material.
Claims
1. A method for constructing a pre-buried drainage pipe structure on a large roof, comprising a main roof structure (1), characterized by the following steps: The first step is to set embedded steel bars (4) in the parapet wall on the main roof structure (1), and then set up inner formwork (2) for pouring concrete of the parapet wall and outer formwork (3) for pouring concrete of the parapet wall; Step 2: Position and tie the embedded drainage pipe (5) to the embedded steel bars (4) in the parapet wall, so that the inner end of the embedded drainage pipe (5) is connected to the inner facade of the inner formwork (2), and the outer end of the embedded drainage pipe (5) passes through the outer formwork (3) and is cantilevered on the outer side of the main roof structure (1); The third step is to pour the parapet concrete. After the poured concrete solidifies, the inner formwork (2) and the outer formwork (3) are removed, so that the embedded drainage pipe (5) and the parapet concrete form a whole. Step 4: Taking the inner port of the pre-buried drainage pipe (5) as a reference, a roof structure leveling layer (8), a roof insulation layer (9), a roof slope layer (10) and a waterproof leveling layer (11) are sequentially arranged on the roof surface, so that the inner port of the pre-buried drainage pipe (5) is located at the lowest drainage point on the roof surface; Step 5: Apply a waterproof protective layer (12) on the waterproof leveling layer (11), extend the waterproof protective layer (12) into the inner cavity of the pre-buried drainage pipe (5), and then turn outward on the water outlet of the pre-buried drainage pipe (5) and be clamped and fixed by a clamp (13), so that the waterproof protective layer (12) on the roof surface and the waterproof protective layer in the inner cavity of the pre-buried drainage pipe (5) form an integral waterproof layer structure without gaps; Step 6: Apply a waterproof layer (14) on the inner wall of the parapet below the waterproof waistline (7), and integrate the waterproof layer (14) on the inner wall of the parapet, the waterproof protective layer (12) and the waterproof layer of the inner cavity of the embedded drainage pipe (5); Step 7: Apply a waterproof layer protection surface layer (16) on the waterproof layer protection layer (12) on the roof surface, so that the top surface of the waterproof layer protection surface layer (16) and the lowest point of the waterproof layer protection layer in the inner cavity of the embedded drainage pipe (5) are arranged at the same slope.
2. The method for constructing a pre-buried drainage pipe structure on a large roof as claimed in claim 4, characterized in that: The waterproof protective layer (12) is formed by laying a waterproof roll material.