Basement bottom plate and side wall pre-paving anti-sticking waterproof construction method

Abstract

The invention discloses a basement bottom plate and side wall pre-paving reverse adhesion waterproof construction method which comprises the following steps: S1) pouring a plain concrete cushion layer by taking undisturbed soil of a foundation pit as a base layer, and pouring a concrete reverse ridge at the junction of a basement bottom plate and a side wall; s2) then spraying a JS polymer waterproof coating; s3) after the JS polymer waterproof coating is dried, continuing to lay the polymer waterproof coiled material in an empty manner and overturning the polymer waterproof coiled material to the surface of the built concrete reverse ridge; s4) laying a first self-adhesive SBS modified asphalt waterproof roll as a waterproof additional layer; (S5) the basement exterior wall is poured, and JS polymer waterproof paint is sprayed on the basement exterior wall; s6, a second self-adhesion type SBS modified asphalt waterproof roll is laid at the horizontal construction joint, and the second self-adhesion type SBS modified asphalt waterproof roll is overturned upwards to be adhered to the first self-adhesion type SBS modified asphalt waterproof roll, and S7, an extrusion molding type polyphenyl polyethylene foam board is laid. According to the waterproof material closing method for the basement bottom plate and the side wall, the problem that waterproof materials at the positions of the basement bottom plate and the side wall are closed is effectively solved.

Description

Technical Field

[0001] The present invention relates to a waterproof construction method, and particularly to a pre-laid and self-adhered waterproof construction method for the basement floor and side walls. Background Art

[0002] The pre-laid and self-adhered waterproof technology for the basement floor and side walls, as a promoted technology in the "10 New Technologies in the Construction Industry (2022 Edition)" by the Ministry of Housing and Urban-Rural Development, is also an advanced and recommended underground engineering waterproof construction practice in the current industry, especially suitable for the external waterproofing and internal pasting method for the basement floor and side walls. However, there is still a problem with the closure of waterproof materials at the basement floor and side walls in the existing methods. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pre-laid and self-adhered waterproof construction method for the basement floor and side walls, which can effectively solve the problem of the closure of waterproof materials at the basement floor and side walls, ensure no water leakage, greatly reduce the waterproof maintenance cost generated by water leakage in the basement in the later stage, and is applicable to basement waterproof construction with high requirements for basement waterproof grade, strict requirements for waterproof quality, and tight construction period, and also has certain reference significance for the construction of other types of basement waterproofing.

[0004] The technical solution adopted by the present invention to solve the above technical problem is to provide a pre-laid and self-adhered waterproof construction method for the basement floor and side walls, including the following steps: S1) Using the original soil in the foundation pit as the base layer, pouring a plain concrete cushion, and at the same time, pouring a concrete counter-camber in advance at the junction of the basement floor and the side walls; S2) Then spraying JS polymer waterproof coating; S3) After the JS polymer waterproof coating is dried, continue to lay the polymer waterproof coiled material in a floating manner and turn it over to the surface of the concrete counter-camber, and then bind the steel bars and pour the concrete to form a waterproof floor; S4) Laying the first self-adhesive SBS modified asphalt waterproof coiled material as a waterproof additional layer; S5) Pouring the exterior wall of the basement and spraying JS polymer waterproof coating on the exterior wall of the basement; S6) Laying the second self-adhesive SBS modified asphalt waterproof coiled material at the horizontal construction joint, and turning the second self-adhesive SBS modified asphalt waterproof coiled material upwards to adhere to the first self-adhesive SBS modified asphalt waterproof coiled material; S7) Laying an extruded polystyrene foam board as a waterproof protective layer for the exterior wall.

[0005] Further, a chamfer is made at the internal angle where the bottom of the plain concrete counter-camber in step S1 intersects with the base layer.

[0006] Further, the thickness of the JS polymer waterproof coating in S2 is 1.5 mm.

[0007] Further, the thickness of the polymer waterproof coiled material in step S3 is 3 mm, and the waterproof floor is flush with the concrete counter-camber.

[0008] Furthermore, in step S4, the thickness of the waterproof additional layer is 3 mm. The lower part of the waterproof additional layer penetrates at least 250 mm into the waterproof floor slab, and the upper opening is at least 200 mm away from the surface of the pre-cast concrete counterfort, and the back adhesive film is reserved.

[0009] Furthermore, step S6 also includes setting a waterstop steel plate at the horizontal construction joint.

[0010] The present invention has the following beneficial effects compared with the prior art: The pre-laid and self-adhered waterproof construction method for the basement floor slab and side wall provided by the present invention changes the traditional brick formwork into a plain concrete counterfort, and adopts a comprehensive waterproof system composed of JS waterproof coating, pre-laid and self-adhered polymer waterproof coiled material, and SBS modified asphalt waterproof coiled material. Waterproof additional layers are added at the edges of the basement floor slab and the construction joints of the side wall, and the construction of the waterproof joint structure at the construction joints of the side wall is optimized, greatly improving the waterproof quality at the junction of the floor slab and the side wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the large-scale drawing of the waterproof joints of the floor slab and side wall in the first embodiment of the present invention; Figure 2 is the large-scale drawing of the waterproof joints of the floor slab and side wall in the second embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The present invention will be further described below with reference to the drawings and embodiments.

[0013] The overall construction process of the present invention in the embodiment is that after the JS waterproof coating on the floor slab is completed and before the construction of the pre-laid and self-adhered polymer coiled material, the SBS modified asphalt waterproof coiled material additional layer needs to be constructed first. It is paved from 250 mm inside the edge of the floor slab to the cast-in-place counterfort platform, with an outward turning length of 200 mm. After the waterproof coating on the basement side wall is completed, the up-turned SBS modified asphalt waterproof coiled material is pulled up and pasted to the outside of the basement side wall, and then the additional layer of the waterproof coiled material on the basement exterior wall is constructed and paved downward to cover the up-turned coiled material on the floor slab, and then the large-area coiled material waterproofing on the basement exterior wall is constructed.

[0014] The waterproof construction process of the floor slab of the present invention in the embodiment is as Figure 1As shown, 1 is the original soil of the foundation pit, 2 is the plain concrete cushion layer (anti-ridge), 3 is the 1.5mm thick JS waterproof coating, 4 is the 3mm thick pre-laid anti-adhesive polymer waterproof membrane, 5 is the reinforced concrete self-waterproof base plate, 6 is the 3mm thick self-adhesive SBS modified asphalt waterproof membrane (the base plate is reserved for turning up); the specific processing flow is as follows: cushion base treatment → 1.5 thick JS waterproof coating → benchmark line trial paving → SBS modified asphalt membrane additional layer → pre-laid anti-adhesive polymer membrane paving → membrane end treatment → finished product protection and maintenance → cleaning, inspection, repair, acceptance → tying base plate steel bars → steel bar acceptance → pouring base plate.

[0015] The side wall waterproofing construction process in the embodiment of the present invention is as follows: Figure 2 As shown, 1 is the original soil of the foundation pit, 2 is the plain concrete cushion (anti-ridge), 3 is the 1.5mm thick JS waterproof coating, 4 is the 3mm thick pre-laid anti-adhesive polymer waterproof membrane, 5 is the reinforced concrete self-waterproof bottom plate, 6 is the 3mm thick self-adhesive SBS modified asphalt waterproof membrane (the bottom plate is reserved for turning up), 7 is the layered compaction of the foundation pit backfill, 8 is the 30mm thick extruded polystyrene polyethylene foam board, 9 is the 3mm thick self-adhesive SBS modified asphalt waterproof membrane, 10 is the 3mm thick self-adhesive SBS Modified asphalt waterproofing membrane (additional waterproofing layer), 11 is reinforced concrete self-waterproofing side wall, 12 is construction joint water-stopping steel plate; the specific treatment process is as follows: side wall base treatment → 1.5 thick JS waterproof coating → 3mm thick self-adhesive SBS modified asphalt waterproofing membrane (bottom plate reserved for turning up) → 3mm thick self-adhesive SBS modified asphalt waterproofing membrane (additional waterproofing layer) → 3mm thick self-adhesive SBS modified asphalt waterproofing membrane → 30mm thick extruded polystyrene polyethylene foam board → backfill soil layered compaction.

[0016] The present invention is operated as follows in the embodiments: (1) When the base layer is treated, the cushion layer is poured. When pouring the cushion layer, a plain concrete counter-ridge is poured at one time to replace the traditional brick membrane. The height of the counter-ridge is the same as the thickness of the base plate.

[0017] (2) When applying JS waterproof coating, first carry out detailed structural construction and then large-surface construction.

[0018] (3) The additional layer of SBS modified asphalt waterproofing membrane is pasted. Additional layers are required at corners, corners, intersections between slopes and walls, etc. First, cut the additional layer according to the shape and size of the details, paste it on the base layer and compact it.

[0019] (4) For pre-laid anti-adhesive polymer roll materials, use the empty laying method to lay the roll materials on the base surface according to the roll material control line, and only stick the overlapping edges. When sticking, the isolation film at the overlapping parts of the roll materials must be peeled off, and the overlapping edges of the roll materials must be compacted with a pressure roller to expel the bubbles at the overlapping edges and compacted tightly to adhere.

[0020] In view of the deficiencies of the traditional waterproof construction techniques for basement floors and side walls, the present invention adopts a pre-laid and self-adhered waterproof joint structure for basement floors and side walls through the above examples. First, by applying JS polymer waterproof coating on the base surface, the waterproof performance of the base can be effectively enhanced, and at the same time, the waterproof performance of weak nodes such as pile foundations can be improved. Secondly, after the JS polymer waterproof coating dries, a pre-laid and self-adhered high-molecular waterproof coiled material is directly laid in the air. The self-adhesive film layer of the high-molecular waterproof coiled material faces the structure and is laid in the air on the base surface, and then the bottom slab steel bars are tied and concrete is poured. After the bottom slab concrete cures, a complete and continuous bond is formed with the adhesive layer. The waterproof coiled material wraps the structural concrete from bottom to top, and the two are closely combined, eliminating the problem of water seepage, fundamentally improving the reliability of underground waterproofing, and establishing an "epidermal" waterproof system for underground projects. The waterproof layer is firmly bonded to the bottom slab concrete, and water leakage only occurs when the damaged part of the waterproof layer coincides with the structural defect part. The leakage points are easy to identify and convenient to repair, and the occurrence of leakage points will not cause large-area failure of the waterproof layer.

[0021] At the junction of the basement floor and the side wall, by pouring a concrete curb in advance, chamfer the internal corner at the junction of the bottom of the curb and the base, apply JS polymer waterproof coating after spraying, use self-adhesive SBS modified bitumen waterproof coiled material as an additional layer, with the lower part extending into the bottom slab by at least 250mm, the upper opening reaching the surface of the pre-poured curb, leaving at least 200mm, and retaining the back film, and then lay the high-molecular waterproof coiled material in the air and turn it over to the surface of the curb. Through this method, by utilizing the waterproof performance of the two waterproof layers formed at the external corner of the bottom slab edge and the concrete curb, the entry of side water below the bottom slab can be effectively reduced, and the construction time of the brick formwork on the outside of the bottom slab can also be saved.

[0022] After the underground exterior wall is poured, first apply JS polymer waterproof coating on the underground exterior wall, and then when constructing the additional layer at the horizontal construction joint, first turn up the reserved SBS waterproof coiled material and bond it to the accessory layer, and finally construct the large-area SBS waterproof coiled material. The coiled material is laid to the surface of the pre-poured concrete curb, completely covering the reserved SBS waterproof coiled material and the waterproof additional layer at the horizontal joint. Through this method, the bottom slab waterproof coiled material is placed inside the waterproof additional layers of the exterior wall and the horizontal construction joint, enhancing the waterproof performance of the bottom slab and the side wall.

[0023] The pre-laid and self-adhered waterproof construction method for basement floors and side walls provided by the present invention has the following advantages: 1. An integrated waterproofing system composed of JS waterproof coating, pre-laid and self-adhered polymer waterproofing membrane, and SBS modified bitumen waterproofing membrane is adopted, and waterproof additional layers are added at the edges of the basement floor slab and the construction joints of the side walls. The pre-laid and self-adhered polymer waterproofing membrane has the characteristics of firm adhesion, multiple waterproofing, and long service life. At the same time, by optimizing the waterproof lap joints of the floor slab and the side walls, the overall waterproofing of the entire basement is stronger, with good durability and reliable quality. 2. The waterproofing of the basement floor slab adopts a pre-laid and self-adhered polymer waterproofing membrane with an empty laying method, which has lower requirements for the base surface. After laying, there is no need to pour a protective layer, and the steel bars can be directly tied on the membrane, saving the construction period. At the same time, pre-cast concrete counterforts are used to replace the traditional brick formwork, reducing the construction cost. 3. JS polymer waterproofing has the characteristics of water resistance, no milking back, no swelling, non-toxic, and pollution-free. The pre-laid and self-adhered polymer waterproofing membrane and SBS modified bitumen waterproofing membrane do not require solvents and fuels during the construction process, and there is no need for open fire baking, avoiding environmental pollution and fire hazards.

[0024] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the claims.

Claims

1. A method for pre-paving reverse-adhesive waterproofing of basement floor and side wall, characterized in that: The steps include: S1) Use the original soil of the foundation pit as the base, pour the plain concrete cushion layer, and pour the concrete counter-slope in advance at the junction of the basement floor and the side wall; S2) Then spray JS polymer waterproof coating; S3) After the JS polymer waterproof coating is dry, continue to lay the polymer waterproof membrane and turn it over to the surface of the concrete counter-slope, then tie the steel bars and pour concrete to form a waterproof base plate; S4) Laying the first self-adhesive SBS modified asphalt waterproofing roll as an additional waterproofing layer; S5) pour the basement exterior wall and spray JS polymer waterproof coating on the basement exterior wall; S6) laying a second self-adhesive SBS modified asphalt waterproof roll at the horizontal construction joint, wherein the second self-adhesive SBS modified asphalt waterproof roll is turned upside down and adhered to the first self-adhesive SBS modified asphalt waterproof roll; S7) Lay extruded polystyrene polyethylene foam board along the outer wall of the basement as a waterproof protective layer for the outer wall.

2. The basement floor and side wall pre-paving reverse adhesive waterproofing construction method as claimed in claim 1, characterized in that: In the step S1, the inner corner where the bottom of the plain concrete counter-ridge meets the base layer is chamfered.

3. The basement floor and side wall pre-paving reverse adhesive waterproofing construction method as claimed in claim 1, characterized in that: The thickness of the JS polymer waterproof coating in S2 is 1.5 mm.

4. The basement floor and side wall pre-paving reverse adhesive waterproofing construction method as claimed in claim 1, characterized in that: In step S3, the thickness of the polymer waterproofing membrane is 3 mm, and the waterproof base plate is flush with the concrete counter-ridge.

5. The basement floor and side wall pre-paving reverse adhesive waterproofing construction method as claimed in claim 1, characterized in that: The thickness of the additional waterproof layer in step S4 is 3 mm, the lower part of the additional waterproof layer penetrates into the waterproof base plate by at least 250 mm, and the upper part reaches the surface of the precast concrete counter-ridge, leaving at least 200 mm, and retaining the adhesive film on the back.

6. The basement floor and side wall pre-paving reverse adhesive waterproofing construction method as claimed in claim 1, characterized in that: The step S6 also includes setting a water stop steel plate at the horizontal construction joint.

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