Welding treatment construction method for polymer waterproof coiled material pipeline with self-adhesive layer

Abstract

The invention discloses a welding treatment construction method for a high-molecular waterproof coiled material pipeline with a self-adhesive layer, which comprises the following steps: cleaning the pipe wall of the pipeline and a substrate surface in contact with the pipe wall of the pipeline, and brushing a surface treating agent after cleaning; laying a double-sided non-asphalt-based polymer wet-laid waterproof coiled material additional enhancement layer on the pipe wall and the base surface coated with the surface treating agent, and then laying a polymer waterproof coiled material with a self-adhesive layer on the laid base surface; selecting a homogeneous high-molecular coiled material which is the same as the high-molecular waterproof coiled material with the self-adhesive layer in material to manufacture a middle layer, and sleeving the middle layer at the root of the pipeline; selecting a homogeneous high-molecular coiled material which is the same as the high-molecular waterproof coiled material with the self-adhesive layer in material to manufacture a waterproof layer, and coating the outer wall of the pipeline with the waterproof layer; and mechanically fixing the port of the waterproof layer by adopting a hoop, and sealing the fixed part. The waterproof sealing performance and reliability of the polymer waterproof coiled material with the self-adhesive layer at a building pipeline part can be effectively guaranteed, and the adaptability is wider.

Description

Technical Field

[0001] The invention belongs to the technical field of building waterproof construction, and in particular relates to a construction method for welding a pipeline of a polymer waterproof coiled material with a self-adhesive layer. Background Art

[0002] The common polymer waterproof membrane with self-adhesive layer on the market has its own polymer adhesive layer, which can form a full bonding effect with the base surface. It is a polymer product, green and environmentally friendly, friendly to the environment and construction workers, and has a long service life. It is widely used in waterproofing projects such as underground floors, underground side walls, garage roofs, and roofs of buildings. It is the development trend of membrane products in the waterproofing industry.

[0003] The roof pipes, the wall pipes of the basement side walls and garage roof, and the indoor floor pipes are the details that need to be treated as the focus of building waterproofing. If they are not handled properly, it is easy to cause serious water leakage, and in severe cases, it will cause the entire waterproof layer to fail, affecting the use function and life of the building.

[0004] At present, the main construction technology is generally to directly use the adhesive layer provided by the wall for bonding, or to use flexible waterproof coating before bonding, or to use modified asphalt waterproof membrane before bonding;

[0005] Directly using polymer waterproofing membrane with self-adhesive layer for pipeline treatment has the disadvantage of many gaps, and the lap joints cannot be directly welded, and can only be bonded by the self-adhesive layer. The lap joints after bonding are prone to lose their proper adhesion and sealing over time, and after a certain period of time, there is a risk of leakage such as debonding, lap joint opening, and sealing failure;

[0006] Flexible waterproof coating is used for pre-treatment, but due to the poor adhesion between the flexible waterproof coating and the polymer waterproof membrane with self-adhesive layer, the two cannot be effectively integrated into a whole after bonding, and after a certain period of time, there is a risk of leakage such as debonding, opening of lap joints, and sealing failure;

[0007] Modified asphalt waterproofing membrane is pre-treated, but the compatibility between modified asphalt and polymer waterproofing membrane with self-adhesive layer is extremely poor. The oil in the modified asphalt will migrate to the interior of the polymer waterproofing membrane with self-adhesive layer over time, causing the polymer waterproofing membrane with self-adhesive layer to appear yellowing, swelling, performance degradation and other quality defects. After a certain period of time, it is prone to leakage risks such as debonding, opening of lap joints, and sealing failure.

[0008] Although the application of polymer waterproof membrane in single-layer roofing projects is relatively mature, the application maturity of polymer waterproof membrane with self-adhesive layer in flat roof, underground and other waterproofing projects is relatively low, especially for detailed nodes such as roof pipes, underground wall pipes and other detailed nodes. The treatment processes are diverse, resulting in uneven waterproofing effects after construction. Once the waterproof layer is used for a certain period of time, quality accidents such as degumming, opening of lap joints, and sealing failure will occur, resulting in the risk of secondary leakage. This is also one of the fundamental reasons why the leakage rate of waterproofing projects using polymer waterproof membrane with self-adhesive layer in China is still high. Summary of the invention

[0009] The technical problem to be solved by the present invention is to provide a construction method for welding pipes with a self-adhesive polymer waterproofing membrane, which has standardized construction, convenient operation, good material compatibility, reliable waterproofing effect, long service life, and very good practical value.

[0010] The technical solution adopted by the present invention is: a construction method for welding a pipeline with a self-adhesive polymer waterproofing coil, comprising the following steps:

[0011] S1: Clean the pipe wall and the base surface in contact with the pipe wall, remove dust and ash on the pipe wall and the base surface, and apply surface treatment agent to the pipe wall and the base surface after cleaning;

[0012] S2: Lay a double-sided non-asphalt-based polymer wet-laid waterproofing membrane with an additional reinforcement layer on the pipe wall and base surface coated with a surface treatment agent, and then lay a polymer waterproofing membrane with a self-adhesive layer on the base surface. When laying to the pipe, cut it along the shape of the pipe root to form an annular gap between the polymer waterproofing membrane with a self-adhesive layer and the pipe wall;

[0013] S3: A homogeneous polymer roll of the same material as the polymer waterproof roll with a self-adhesive layer is selected to make an intermediate layer, the intermediate layer is cut into a ring shape according to the pipe diameter, the inner diameter is heated with a hot air welding gun and stretched, and then the inner diameter is sleeved on the root of the pipe, and the outer diameter edge is hot-air welded with a hot air welding gun;

[0014] S4: A homogeneous polymer coiled material of the same material as the polymer waterproof coiled material with a self-adhesive layer is selected to make a waterproof layer, a wide edge of the waterproof layer is heated and stretched by a hot air welding gun to form a 20 mm wide skirt shape, the skirt is placed at the root of the pipeline and then the pipeline is annularly wrapped, and after the wrapping, the skirt and the overlapping parts are welded by a hot air welding gun;

[0015] S5: The end of the waterproof layer away from the base surface is mechanically fixed with a clamp, and a low-modulus and highly weather-resistant polymer sealant is used at the fixed position for sealing.

[0016] Preferably, the double-sided non-asphalt-based polymer wet-laid waterproofing membrane is composed of polyolefin compounds made of special rubber and ultra-high polymer resin.

[0017] Preferably, in step 4, the effective welding width of the intermediate layer is ≥25 mm.

[0018] Preferably, in step 5, the effective welding width of the skirt of the waterproof layer is ≥25 mm, and the effective welding width of the overlapping part is ≥25 mm.

[0019] Preferably, the low modulus and highly weather-resistant polymer sealant is PU sealant or MS sealant.

[0020] The beneficial effects of the present invention are:

[0021] (1) The waterproof materials used in the present invention are all polymer materials with good compatibility. During the service life of the waterproof layer, there are no defects such as material incompatibility, material delamination, debonding, and opening, thereby ensuring the effective life of the waterproofing;

[0022] (2) The additional reinforcement layer is a double-sided non-asphalt-based polymer wet-laid waterproofing membrane that is fully bonded by a self-adhesive method. This product is composed of a polyolefin compound made of special rubber and ultra-high polymer resin, does not contain any asphalt components, and has good compatibility with the polymer waterproofing membrane with a self-adhesive layer. The purpose is to ensure that it has good compatibility with the subsequent polymer waterproofing membrane with a self-adhesive layer and homogeneous membrane. It is also the first line of defense for the pipeline, which can achieve effective waterproofing and solve the risk of water leakage at the pipe mouth.

[0023] (3) When the self-adhesive polymer waterproofing membrane is used in the pipeline, a homogeneous waterproofing membrane of the same material is used. The purpose is to facilitate hot air welding. Because one side of the self-adhesive polymer waterproofing membrane is a self-adhesive layer, this self-adhesive layer and the polymer sheet layer on the other side of the membrane cannot be directly hot-air welded. Only polymer sheet layers of the same material can be directly hot-air welded. Only hot-air welding can ensure that the joint between the pipe wall waterproofing layer and the large surface waterproofing layer is permanently waterproofed and closed, ensuring that the life of the joint is consistent with the life of the waterproofing layer.

[0024] (4) The pipe mouth is sealed with a polymer sealant. The polymer sealant should be a low-modulus, high-weather-resistant PU sealant or MS sealant. The purpose is to ensure that the sealing material has good compatibility with the self-adhesive polymer waterproof membrane and good weather resistance. During the use of the waterproof layer, there is no risk of leakage caused by aging of the pipe mouth waterproof sealing material.

[0025] The present invention can effectively ensure the waterproof sealing and reliability of the polymer waterproof membrane with a self-adhesive layer in the pipe parts of the building, eliminates the risk of secondary leakage caused by the polymer waterproof membrane with a self-adhesive layer in the pipe parts due to poor compatibility between materials, overlap defects or its own thermal expansion and contraction characteristics, and has wider adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram after painting in step S1 of the present invention;

[0027] Figure 2 This is a schematic diagram after laying an additional reinforcement layer in step S2 of the present invention;

[0028] Figure 3 This is a schematic diagram of laying a polymer waterproofing membrane with a self-adhesive layer in step S2 of the present invention;

[0029] Figure 4 is a schematic diagram of the intermediate layer in step S3 of the present invention;

[0030] Figure 5 This is a schematic diagram of the middle layer after stretching in step S3 of the present invention;

[0031] Figure 6 This is a schematic diagram of the intermediate layer being sleeved on the root of the pipe in step S3 of the present invention;

[0032] Figure 7 This is a schematic diagram of the waterproof layer in step S4 of the present invention;

[0033] Figure 8 This is a schematic diagram of the pipeline after the waterproof layer is coated in step S4 of the present invention;

[0034] Fig. 9 This is a schematic diagram of the clamp after installation in step S5 of the present invention;

[0035] Fig.10 Schematic diagram of polymer sealant processing in step S5 of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example

[0038] The construction method for welding a pipeline with a self-adhesive polymer waterproofing coil provided in this embodiment comprises the following steps:

[0039] S1: Figure 1 As shown, the pipe wall and the base surface in contact with the pipe wall are cleaned, and dust and ash on the pipe wall and the base surface are removed. After cleaning, the pipe wall and the base surface are coated with a surface treatment agent. The surface treatment agent to be coated is required to be thin and even, and ensure that the bottom is not exposed after coating;

[0040] S2: Figure 2 As shown, a double-sided non-asphalt-based polymer wet-laid waterproofing membrane additional reinforcement layer is laid on the pipe wall and the base surface coated with a surface treatment agent. The double-sided non-asphalt-based polymer wet-laid waterproofing membrane additional reinforcement layer is composed of a polyolefin compound made of special rubber and ultra-high polymer resin, which does not contain any asphalt components and is a polymer product. It has good compatibility with the polymer waterproofing membrane with a self-adhesive layer, and can form a full bonding effect with the base surface and the pipe wall of the pipe through a self-adhesive method. It is the first waterproof line of the pipeline part, and can also form a full bonding effect with the waterproof layer of the polymer waterproofing membrane with a self-adhesive layer. The two are integrated into a whole, which can solve the risk of water leakage at the pipe mouth.

[0041] like Figure 3 As shown, a polymer waterproofing membrane with a self-adhesive layer is laid on the base surface of the additional reinforcement layer of the double-sided non-asphalt-based polymer wet-laid waterproofing membrane. When it is laid to the pipeline, it is cut along the shape of the root of the pipeline to form an annular gap between the polymer waterproofing membrane with a self-adhesive layer and the pipeline wall.

[0042] S3: Figure 4 As shown, a homogeneous polymer coiled material of the same material as the polymer waterproof coiled material with a self-adhesive layer described in step S2 is selected to make the middle layer, and the middle layer is cut into a ring-shaped sheet according to the pipe diameter; Figure 5 , Figure 6 As shown, use a hot air welding gun to heat the inner diameter and stretch it, then put it on the root of the pipe through the inner diameter, and use a hot air welding gun to hot air weld the edge of the outer diameter, and the effective welding width is ≥25mm;

[0043] S4: Figure 7 As shown, a homogeneous polymer coiled material of the same material as the polymer waterproof coiled material with a self-adhesive layer described in step S2 is selected to make a waterproof layer, and a wide edge of the waterproof layer is heated and stretched by a hot air welding gun to form a 20mm wide skirt shape; Figure 8 As shown, after placing the skirt at the root of the pipe, the pipe is annularly covered. After covering, the skirt and the overlapping parts are welded with a hot air welding gun. The effective welding width of the skirt is ≥10mm, and the effective welding width of the overlapping parts is ≥25mm;

[0044] S5: Fig. 9 As shown, the end of the waterproof layer away from the base surface is mechanically fixed with a clamp. The purpose is that the polymer coil has a high elongation rate and a large dimensional change rate. During use, it is very easy to cause a gap between the waterproof layer and the pipe wall due to thermal expansion and contraction of the coil, resulting in leakage. When a stainless steel metal clamp is used to mechanically fix the pipe mouth, it can effectively ensure that the waterproof coil at the catheter is tightly and permanently combined with the pipe wall;

[0045] like Fig.10 As shown, a low modulus and high weather resistance polymer sealant is used for sealing at the fixed part, and the low modulus and high weather resistance polymer sealant is PU sealant or MS sealant; the purpose is to ensure that the sealing material has good compatibility with the polymer waterproof membrane with a self-adhesive layer, good weather resistance, and no leakage risk caused by aging of the pipe opening waterproof sealing material occurs during the use of the waterproof layer;

[0046] The material of the homogeneous waterproofing membrane described in steps S3 and S4 is the same as the material of the polymer waterproofing membrane with a self-adhesive layer in step S2. The purpose is that only products with the same material can ensure the reliability and service life of hot air welding of the lap joints. For example, if the designed waterproof layer is a TPO waterproofing membrane with a self-adhesive layer, then the homogeneous polymer membrane with the same material is a TPO waterproofing membrane; because one side of the polymer waterproofing membrane with a self-adhesive layer is a self-adhesive layer, this self-adhesive layer and the polymer sheet layer on the other side of the membrane cannot be directly hot-air welded, and only polymer sheet layers with the same material can be directly hot-air welded. Only hot-air welding can ensure that the joint between the pipe wall waterproofing layer and the large surface waterproofing layer is permanently waterproof and closed, ensuring that the joint life is consistent with the life of the waterproofing layer.

[0047] The above description is only a preferred implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A construction method for welding a pipeline with a self-adhesive polymer waterproofing coil, characterized in that: The following steps are involved: S1: Clean the pipe wall and the base surface in contact with the pipe wall, remove dust and ash on the pipe wall and the base surface, and apply surface treatment agent to the pipe wall and the base surface after cleaning; S2: Lay a double-sided non-asphalt-based polymer wet-laid waterproofing membrane with an additional reinforcement layer on the pipe wall and base surface coated with a surface treatment agent, and then lay a polymer waterproofing membrane with a self-adhesive layer on the base surface. When laying to the pipe, cut it along the shape of the pipe root to form an annular gap between the polymer waterproofing membrane with a self-adhesive layer and the pipe wall; S3: A homogeneous polymer roll of the same material as the polymer waterproof roll with a self-adhesive layer is selected to make an intermediate layer, the intermediate layer is cut into a ring shape according to the pipe diameter, the inner diameter is heated with a hot air welding gun and stretched, and then the inner diameter is sleeved on the root of the pipe, and the outer diameter edge is hot-air welded with a hot air welding gun; S4: A homogeneous polymer coiled material of the same material as the polymer waterproof coiled material with a self-adhesive layer is selected to make a waterproof layer, a wide edge of the waterproof layer is heated and stretched by a hot air welding gun to form a 20 mm wide skirt shape, the skirt is placed at the root of the pipeline and then the pipeline is annularly wrapped, and after the wrapping, the skirt and the overlapping parts are welded by a hot air welding gun; S5: The end of the waterproof layer away from the base surface is mechanically fixed with a clamp, and a low-modulus and highly weather-resistant polymer sealant is used to seal the fixed part.

2. The method for welding a pipeline with a self-adhesive polymer waterproofing coil according to claim 1, characterized in that: The double-sided non-asphalt-based polymer wet-laid waterproofing coiled material is composed of polyolefin compounds made of special rubber and ultra-high polymer resin.

3. The method for welding a pipeline with a self-adhesive polymer waterproofing coil according to claim 1, characterized in that: In step 4, the effective welding width of the intermediate layer is ≥25 mm.

4. The method for welding a pipeline with a self-adhesive polymer waterproofing coil according to claim 1, characterized in that: In step 5, the effective welding width of the skirt of the waterproof layer is ≥25mm, and the effective welding width of the overlapping part is ≥25mm.

5. The method for welding a pipeline with a self-adhesive polymer waterproofing coil according to claim 1, characterized in that: The low modulus and high weather resistance polymer sealant is PU sealant or MS sealant.

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