阅读说明：本技术 预制浴厨楼板、安装结构及施工方法 (Prefabricated bath and kitchen floor slab, installation structure and construction method ) 是由 黃永灏 于 2019-09-03 设计创作，主要内容包括：本发明公开了一种预制浴厨楼板的施工方法,预制浴厨楼板在工厂中一体浇筑成型,灯喉管、排水管布置、防水处理以及回填等都是在工厂内进行的,缩短了施工周期、降低了现场噪音、提高了浴厨防水性能以及减少了材料的浪费等。本发明还公开了一种预制浴厨楼板及其安装结构。(The invention discloses a construction method of a prefabricated bath and kitchen floor slab, wherein the prefabricated bath and kitchen floor slab is integrally cast and molded in a factory, and a lamp throat pipe, a drain pipe, waterproof treatment, backfilling and the like are all carried out in the factory, so that the construction period is shortened, the field noise is reduced, the bath and kitchen waterproof performance is improved, the waste of materials is reduced and the like. The invention also discloses a prefabricated bath and kitchen floor slab and a mounting structure thereof.)

1. A construction method of a prefabricated bath and kitchen floor slab is characterized by comprising the following steps:

s10: in a factory, installing an external mold, arranging reinforcing steel bars, installing a lamp throat and a drain pipe embedded part according to the shape of a prefabricated floor slab (1), then installing an internal mold, pouring concrete into the mold, and removing the external mold and the internal mold after the concrete is solidified to obtain the prefabricated floor slab (1), wherein the prefabricated floor slab (1) comprises a bottom plate (2) and a side wall (3) extending upwards from the periphery of the bottom plate (1), a groove (4) with an upward opening is formed by the bottom plate (1) and the side wall (3), and a short wall (5) formed by integrally pouring is arranged on the top surface of the side wall (3);

s20: in a factory, injecting water into the groove (4) of the precast floor slab obtained in the step S10 for leakage test, and if the precast floor slab (1) does not leak after a preset time, executing a step S30;

s30: in a factory, coating waterproof paint on the inner wall of a prefabricated floor slab (1), and arranging a protective layer on the surface of the waterproof paint;

s40: arranging a drainage pipeline in the tank (4) in a factory, performing a water pressure test, and executing the step S50 if the water pressure test is qualified;

s50: backfilling the groove (4) with filler in a factory;

s60: and (2) hoisting the prefabricated floor slab (1) obtained in the step (S50) to a preset position of a floor, installing a support at the bottom of the prefabricated floor slab (1), then pouring a floor slab cast-in-place part (15) and an outer wall cast-in-place part (16), and anchoring reinforcing steel bars extending out of the periphery of the prefabricated floor slab (1) into the floor slab cast-in-place part (15) and the outer wall cast-in-place part (16).

2. The construction method of a prefabricated bath floor as claimed in claim 1, wherein the waterproof coating material is a polyurethane type waterproof coating material or a JS waterproof coating material in step S30.

3. The method of constructing a prefabricated bath floor as claimed in claim 2, wherein said protective layer is a mixture of cement and sand, said protective layer having a thickness of 3-5 cm.

4. The construction method of a prefabricated bath floor as claimed in claim 3, wherein the waterproof layer construction method comprises the steps of, in step S30:

s301: cleaning the inner surfaces of the groove (4) and the low wall (5);

s302: wetting the inner surfaces of the tank (4) and the low wall (5) with water, but not accumulating water;

s303: coating a first layer of waterproof paint on the inner surface of the prefabricated floor slab (1) by using a roller, wherein the coating thickness is 1-1.5mm, the coating sequence is from the inner wall of the short wall (5) to the inner wall of the side wall (3) to the inner surface of the bottom plate (2), any protrusion is used for making a waterproof closing-up with the thickness of 100mm, and the waterproof closing-up is naturally dried for 2-8 hours;

s304: coating a second layer of waterproof paint on the surface of the first layer of waterproof layer by using a roller, wherein the coating thickness is 1-1.5 mm;

s305: and naturally drying after finishing brushing.

5. A prefabricated bath floor slab prepared by the construction method according to any one of claims 1 to 4, it is characterized in that the prefabricated floor slab (1) as the main body of the prefabricated bath and kitchen floor slab is formed by one-time pouring of concrete, the prefabricated floor slab (1) comprises a bottom plate (2) and a side wall (3) which is vertical to the bottom plate (1) and extends upwards, the bottom plate (2) and the side wall (3) form a groove (4) with an upward opening, the top surface of the side wall (3) is provided with a short wall (5) which extends vertically and upwards and is formed by integral pouring, the inner walls of the groove (4) and the short wall (5) are provided with a waterproof layer (18) and a protective layer (19), the concrete of the prefabricated floor slab (1) is internally provided with a lamp throat pipe (20), the groove (4) is internally provided with a drainage pipeline (21), and the groove (4) is filled with backfill (22).

6. Prefabricated bath floor according to claim 5, characterised in that the floor (2) is rectangular or square, the side walls (3) extending upwards along four sides of the floor (2).

7. Prefabricated bath floor according to claim 5, characterised in that the side wall (3) comprises a first side wall (31), a second side wall (32), a third side wall (33) and a fourth side wall (34) connected end to end, wherein the first side wall (31), the second side wall (32) and the fourth side wall (34) are arranged along three sides of the floor (2), respectively, both ends of the first side wall (31) are connected with one end of the second side wall (32) and one end of the fourth side wall (34), respectively, the third side wall (33) comprises a first portion (331) extending from the other end of the fourth side wall (34) along the other side of the floor (2), a second portion (332) perpendicularly bent from the end of the first portion (331) into the prefabricated floor (1), and a third portion (333) perpendicularly bent from the end of the second portion (332) in the direction of the second side wall (32), the third part (333) is connected with the second side wall (32) into a whole, the first part (331) and the second part (332) divide the upper part of the bottom plate (2) into a groove (4) and a first area (6), wherein the first area (6) does not need to be subjected to waterproof treatment.

8. Prefabricated bath floor according to claim 7, characterised in that first reinforcement bars (7) extend from the first side wall (31), second reinforcement bars (8) extend from the outer wall of the second side wall (32), third reinforcement bars (9) extend from the edge of the floor (2) where the third side wall (33) is located, fourth reinforcement bars (10) extend from the edge of the floor (2) where the fourth side wall (34) is located, and fifth reinforcement bars (11) extend from the edge of the floor (2) between the end of the second side wall (32) and the corner of the first area (6).

9. Prefabricated bath floor according to claim 8, characterised in that the main drainage pipe of the drainage pipe (21) is connected to the outside of the tank (4) through the fourth side wall (34), the branch of the drainage pipe (21) also being connected to the first zone (6) through the second (332) or third (333) section; the short wall (5) above the first side wall (31) is provided with a gap (51).

10. A prefabricated kitchen floor slab installation structure, comprising a prefabricated floor slab (1) according to any one of claims 5 to 8, further comprising a cast-in-place floor slab part (15) and a cast-in-place exterior wall part (16), wherein the first reinforcing steel bars (7), the second reinforcing steel bars (8) and the fifth reinforcing steel bars (11) are anchored in the cast-in-place floor slab part (15), the third reinforcing steel bars (9) and the fourth reinforcing steel bars (10) are vertically bent upward, the third reinforcing steel bars (9) and the fourth reinforcing steel bars (10) are anchored in the cast-in-place exterior wall part (16), the cast-in-place floor slab part (15) comprises a floor slab horizontal part (151) and a floor slab sinking part (152), the first reinforcing steel bars (7) and the second reinforcing steel bars (8) are anchored in the floor slab horizontal part (151), and the fifth reinforcing steel bars (11) are anchored in the floor sinking part (152), the horizontal part (151) of the floor slab is connected with the sunken part (152) of the floor slab through a vertical side plate (153), the sunken part (152) of the floor slab is further connected with the cast-in-place part (16) of the outer wall, the sunken part (152) of the floor slab, the side plate (152) and the cast-in-place part (16) of the outer wall are matched to form a sunken channel groove (17), and one end of the channel groove (17) is communicated with the first area (6).

Technical Field

The invention relates to the field of buildings, in particular to a prefabricated bathroom floor, an installation structure and a construction method.

Background

It is common to choose a sink type bathroom or kitchen in modern buildings, which means that a part or the whole of the bathroom or kitchen is sunk at a height of 35-40cm from a corresponding floor when being constructed, horizontal drain pipes of the bathroom or kitchen are arranged in the sink area, and then are refilled with a light material. The blow off pipe of formula of sinking bath cabinet need not pass with the floor, can realize with the floor drainage, if the condition that takes place to clear up the mediation, can solve the problem promptly in this floor.

The existing sunken type bath and kitchen floor is often provided with a mould at the bath and kitchen position of a construction site and is formed by casting in situ, and the bath and kitchen floor cast in situ has a plurality of defects. Fig. 1 is a schematic cross-sectional view of a cast-in-place bath floor 100. Referring to fig. 1, since the strength of concrete used for the bath floor 100 is different from that of concrete used for the same cast-in-place structural exterior wall 101, separate casting is required, so that a seam exists between the bath floor 100 and the structural exterior wall 101, that is, at the position II in fig. 1, not only is the position prone to water seepage, but also there are more steel bars at the corner of the position II, and the cast-in-place quality is difficult to ensure. With continued reference to fig. 1, the non-structural interior wall 102 of the bathroom or kitchen and the kitchen floor 100 need to be separately cast, so that there is a construction joint at the joint of the non-structural interior wall 102 and the kitchen floor 100, i.e. the position I in fig. 1, and since the construction joint is easily exposed to the ground water, the water easily permeates into the steel bars in the kitchen floor after long-term immersion, thereby corroding or destroying the floor structure. In addition, the floor of the bathroom or kitchen after finishing is flush with the construction joints at the root of the inner wall 102, so that water accumulated on the floor is easily permeated into the joints. In addition, the site operation is not easy to manage, the quality of the poured product is low, the construction period is long, the construction noise is high, and the materials are wasted in later decoration. In addition, once the waterproof test of the cast-in-place sunken bath kitchen floor is unqualified, various measures are needed to remedy the concrete density, even the cast-in-place sunken bath kitchen floor is required to be dismantled seriously, and the construction period is prolonged.

Disclosure of Invention

In order to overcome one or more defects of the prior art, the invention discloses a construction method of a prefabricated bath and kitchen floor slab, which comprises the following steps:

s10: in a factory, installing an external mold, arranging reinforcing steel bars, installing a lamp throat and a drain pipe embedded part according to the shape of a prefabricated floor slab, then installing an internal mold, pouring concrete into the mold, and removing the external mold and the internal mold after the concrete is solidified to obtain the prefabricated floor slab, wherein the prefabricated floor slab comprises a bottom plate and a side wall extending upwards from the periphery of the bottom plate, a groove with an upward opening is formed in the bottom plate and the side wall, and a short wall formed by integral pouring is arranged on the top surface of the side wall;

s20: in the factory, injecting water into the groove of the precast floor slab obtained in the step S10, and if the precast floor slab does not leak after a predetermined time, executing a step S30;

s30: in a factory, coating waterproof paint on the inner wall of a prefabricated floor slab, and arranging a protective layer on the surface of the waterproof paint layer;

s40: arranging a drainage pipeline in the tank in a factory, performing a water pressure test, and executing the step S50 if the water pressure test is qualified;

s50: backfilling the groove with filler in a factory;

s60: and in a construction site, hoisting the prefabricated floor slab obtained in the step S50 to a preset position of a floor, installing a support at the bottom of the prefabricated floor slab, and then pouring a floor slab cast-in-place part and an outer wall cast-in-place part, so that the steel bars extending out of the periphery of the prefabricated floor slab are anchored into the floor slab cast-in-place part and the outer wall cast-in-place part.

In certain embodiments, the water-resistant coating is a polyurethane-based water-resistant coating or a JS water-resistant coating.

In certain embodiments, the protective layer is a mixture of cement and sand, and the protective layer has a thickness of 3 to 5 cm.

In some embodiments, in step S30, the waterproof layer construction method includes the steps of:

s301: cleaning the interior surfaces of the trough and the low walls;

s302: wetting the interior surfaces of the trough and the low wall with water, but not accumulating water;

s303: coating a first layer of waterproof paint on the inner surface of the prefabricated floor slab by using a roller, wherein the coating thickness is 1-1.5mm, the coating sequence is from the inner wall of the short wall to the inner wall of the side wall to the inner surface of the bottom plate, any extension is subjected to 100mm waterproof closing up, and the prefabricated floor slab is naturally dried for 2-8 hours;

s304: coating a second layer of waterproof paint on the surface of the first layer of waterproof layer by using a roller, wherein the coating thickness is 1-1.5 mm;

s305: naturally drying after finishing coating

The method provided by the invention has the following beneficial effects: (1) the low wall is integrally cast, and corners where the bottom of the prefabricated floor slab is connected with the outer wall are also integrally cast, so that seams of the positions are eliminated, and water accumulated in a bath cabinet is prevented from flowing to other rooms and downstairs; (2) the prefabricated bath and kitchen floor slabs are produced in batches in a factory, the production efficiency is high, and the prefabricated bath and kitchen floor slabs are conveyed to a site to be directly installed, so that the site construction period is shortened; (3) the standardization is easy to realize in a factory, the quality of the prefabricated floor slab is easy to guarantee, and the unqualified product is directly scrapped in the factory without delaying the construction period; (4) the work of the die, the steel bar rolling, the lamp throat pipe installation, the water pipe installation, the waterproof treatment and the like is finished in a factory, and the work is not required to be carried out on a construction site, so that the construction progress is greatly accelerated; (5) the arrangement and the use amount of the steel rolling ribs, the lamp throats, the water pipes and the like are known in advance in a factory, the purchase and the use amount of the materials can be reasonably planned, and the waste of the materials is reduced.

According to another aspect of the invention, the prefabricated bath floor slab prepared according to the method is formed by one-step pouring of concrete, the prefabricated floor slab serving as the main body of the prefabricated bath floor slab comprises a bottom plate and a side wall which is perpendicular to the bottom plate and extends upwards, a groove with an upward opening is formed by the bottom plate and the side wall, a short wall which extends upwards vertically and is formed by integral pouring is arranged on the top surface of the side wall, a waterproof layer and a protective layer are arranged on the inner walls of the groove and the short wall, a light throat pipe is arranged in concrete of the prefabricated floor slab, a drainage pipeline is arranged in the groove, and backfill is filled in the groove.

The prefabricated bath and kitchen floor slab of the embodiment has the beneficial effects that: the main body of the prefabricated bath and kitchen floor slab can be integrally cast and molded in a factory, waterproof treatment and backfilling as well as arrangement of a lamp throat, a drainage pipeline and the like are completed in the factory at the same time, only installation work needs to be completed on site, and the site construction period is shortened; the low wall is integrally cast, and the corners of the bottom of the prefabricated floor slab, which are connected with the outer wall, are also integrally cast, so that seams at the positions are eliminated, and water accumulated in the bath cabinet is prevented from flowing to other rooms and downstairs.

In some embodiments, the floor is rectangular or square and the sidewalls extend upwardly along four sides of the floor. The precast floor slab of the present embodiment has a regular shape.

In some embodiments, the side wall includes a first side wall, a second side wall, a third side wall and a fourth side wall connected end to end, wherein the first side wall, the second side wall and the fourth side wall are respectively disposed along three sides of the bottom plate, two ends of the first side wall are respectively connected with one end of the second side wall and one end of the fourth side wall as a whole, the third side wall includes a first portion extending from the other end of the fourth side wall along the other side of the bottom plate, a second portion vertically bent from an end of the first portion into the prefabricated floor slab, and a third portion vertically bent from an end of the second portion toward the second side wall, the third portion is connected with the second side wall as a whole, the first portion and the second portion divide the upper portion of the bottom plate into a groove and a first region, and the first region does not need to be waterproofed. The prefabricated bath and kitchen floor slab of the embodiment is specially shaped. The prefabricated floor slab is divided into two areas, one of which is an area requiring waterproofing, i.e., a groove, and the other of which is an area not requiring waterproofing, i.e., a first area. The drainage pipeline is arranged in the groove, and the branch pipe of the drainage pipeline is introduced into the first area and is communicated with the pipe arrangement pipeline of other bathrooms through the first area, so that the waste water in different bathrooms on the same floor can be uniformly discharged through the same outlet.

In some embodiments, the first reinforcement extends from the first sidewall, the second reinforcement extends from the outer wall of the second sidewall, the third reinforcement extends from the edge of the base plate where the third sidewall is located, the fourth reinforcement extends from the edge of the base plate where the fourth sidewall is located, and the fifth reinforcement extends from the end of the second sidewall to the edge of the base plate between the corners of the first region. And the reinforcing steel bars extending out of the periphery of the prefabricated floor slab are anchored into the concrete poured in site, so that the prefabricated floor slab is firmly connected with the floor slab and/or the outer wall of the same floor.

In some embodiments, the main drain pipe of the drain line is connected to the exterior of the tank through the fourth side wall, and the branch of the drain line is also connected to the first section through the second section or the third section.

In some embodiments, the short wall above the first side wall is notched. The notch corresponds to a door of the bathroom.

A prefabricated bath and kitchen floor installation structure comprises a prefabricated floor, a cast-in-place floor part and a cast-in-place outer wall part, wherein a first steel bar, a second steel bar and a fifth steel bar are anchored into the cast-in-place floor part, the third steel bar and the fourth steel bar are vertically bent upwards, the third steel bar and the fourth steel bar are anchored into the cast-in-place outer wall part, the cast-in-place floor part comprises a horizontal floor part and a sunken floor part, the first steel bar, the second steel bar and the fifth steel bar are anchored into the horizontal floor part, the fifth steel bar is anchored into the sunken floor part, the horizontal floor part and the sunken floor part are connected through a vertical side plate, the sunken floor part is further connected with the cast-in-place outer wall part, the sunken floor part, the side plate and the cast-in-place outer wall part are matched to form a sunken channel groove, and one end of the channel. The beneficial effects of the installation structure of the embodiment are as follows: the drainage pipes from other bathrooms are arranged along the channel grooves and extend into the first area, the branch pipes of the drainage pipelines in the prefabricated floor slab extend into the first area through the second part or the third part and are communicated with the drainage pipes from other bathrooms, the communication among different bathrooms is realized, and then the wastewater in other bathrooms is uniformly discharged to the outside through the drainage pipelines of the prefabricated floor slab.

Drawings

Fig. 1 is a cross-sectional view of a conventional kitchen floor slab after cast-in-place.

FIG. 2 is a cross-sectional view of a prefabricated kitchen floor installation structure in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of a prefabricated floor structure in a prefabricated bath floor according to an embodiment of the present invention;

FIG. 4 is a schematic view of a prefabricated floor structure in a prefabricated bath floor according to another embodiment of the present invention;

FIG. 5 is a schematic view of the prefabricated floor slab installation structure of FIG. 4;

FIG. 6 is a flow chart of a method of constructing a prefabricated kitchen floor according to an embodiment of the present invention;

fig. 7 is a flowchart of a waterproof layer construction method according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In accordance with one object of the present invention, there is provided a prefabricated bath floor, and fig. 2 schematically shows a sectional view of an installation structure of the prefabricated bath floor according to an embodiment of the present invention.

Referring to fig. 2, a prefabricated bath floor slab, a prefabricated floor slab 1 used as a main body of the prefabricated bath floor slab is formed by pouring concrete at one time, the prefabricated floor slab 1 includes a bottom plate 2 and a side wall 3 which is perpendicular to the bottom plate 1 and extends upwards, the bottom plate 2 and the side wall 3 form a groove 4 with an upward opening, the top surface of the side wall 3 is provided with a short wall 5 which extends vertically upwards and is formed by integral pouring, the inner walls of the groove 4 and the short wall 5 are provided with a waterproof layer 18 and a protective layer 19, a light throat pipe 20 is arranged in the concrete of the prefabricated floor slab 1, a drainage pipeline 21 is arranged in the groove 4, and a backfill 22 is filled in the groove 4. The lamp throat 20 is a conduit through which electric power or telecommunication wires pass, and is arranged according to the power arrangement drawing, which is not described herein again. The drain line 21 is also arranged according to design drawings, and will not be described herein. The traditional bath floor slab is cast in situ, and after the building is built, the bath floor slab is subjected to waterproof treatment, backfilling and pipeline arrangement when a house is decorated. The main body of the prefabricated bath kitchen floor slab of the embodiment can be integrally formed in a factory, the waterproof treatment, the backfilling, the arrangement of the lamp throat pipe 20, the drainage pipeline 21 and the waterproof test can be completed in the factory, only the installation work is needed in a construction site, the construction period is shortened, and the quality of the prefabricated bath kitchen floor slab produced in the factory is convenient to control. The short wall 5 is arranged above the side wall 3, the short wall 5 and the side wall 3 are integrally cast, then the kitchen non-bearing inner wall is cast on the short wall 5 in situ, and as no seam exists at the connecting position of the short wall 5 and the side wall 3, the accumulated water on the floor of a kitchen room cannot permeate into other rooms from the root of the short wall 5, and cannot permeate into the space below the building from the seam between the floor and the outer wall.

According to different house type layouts, the prefabricated floor slab 1 serving as the prefabricated bath and kitchen floor slab main body can be in a regular shape, for example, a regular quadrilateral shape, and also can be in a special-shaped structure. Fig. 3 schematically shows a schematic structural view of a precast floor slab 1 according to an embodiment of the present invention. Fig. 4 schematically shows a schematic construction of a precast floor slab 1 according to another embodiment of the present invention.

In some embodiments, the precast floor slab 1 may be a regular shape. Specifically, referring to fig. 3, the bottom plate 2 is rectangular or square, and the side walls 3 extend upward along four sides of the bottom plate 2. The prefabricated floor slab 1 of the embodiment has a regular shape, and reinforcing steel bars extend out of the periphery of the prefabricated floor slab 1 and are used for anchoring an outer wall cast in situ and a floor slab on the same floor.

In some embodiments, the precast floor slab 1 may also be a profiled structure. Specifically, referring to fig. 4, the side wall 3 includes a first side wall 31, a second side wall 32, a third side wall 33 and a fourth side wall 34 connected end to end, wherein the first sidewall 31, the second sidewall 32 and the fourth sidewall 34 are respectively disposed along three sides of the bottom plate 2, two ends of the first sidewall 31 are respectively connected with one end of the second sidewall 32 and one end of the fourth sidewall 34 as a whole, the third sidewall 33 includes a first portion 331 extending from the other end of the fourth sidewall 34 along the other side of the bottom plate 2, a second portion 332 vertically bent from the end of the first portion 331 toward the interior of the prefabricated floor panel 1, and a third portion 333 vertically bent from the end of the second portion 332 toward the second sidewall 32, the third portion 333 is connected with the second sidewall 32 as a whole, the first portion 331 and the second portion 332 divide the upper side of the bottom plate 2 into the groove 4 and the first area 6, wherein the first area 6 does not need to be waterproofed. The short wall 5 of the upper portion of the first sidewall 31 is formed with a gap 51 corresponding to a door of a bathroom. The prefabricated floor slab 1 is divided into two areas, one of which is an area requiring waterproofing, i.e., the groove 4, and the other of which is an area not requiring waterproofing, i.e., the first area 6. The drainage pipeline 21 is arranged in the groove 4, and the branch pipe of the drainage pipeline 21 is introduced into the first area 6 and is communicated with the pipe arrangement pipeline of other bathrooms through the first area 6, so that the waste water in different bathrooms on the same floor can be uniformly discharged through the same outlet.

With continued reference to fig. 4, the first reinforcement 7 extends from the first side wall 31, the second reinforcement 8 extends from the outer wall of the second side wall 32, the third reinforcement 9 extends from the edge of the bottom plate 2 where the third side wall 33 is located, the fourth reinforcement 10 extends from the edge of the bottom plate 2 where the fourth side wall 34 is located, and the fifth reinforcement 11 extends from the edge of the bottom plate 2 between the end of the second side wall 32 and the corner of the first area 6. And (3) anchoring the reinforcing steel bars extending out of the periphery of the prefabricated floor slab 1 into the concrete poured in site, so that the prefabricated floor slab 1 is firmly connected with the floor slab and/or the outer wall of the same floor.

When the drain line 21 is disposed in the prefabricated floor panel 1 shown in fig. 4, the main drain pipe of the drain line 21 is connected to the outside of the tank 4 through the fourth side wall 34, and the branch pipe of the drain line 21 is also connected to the first section 6 through the second portion 332 or the third portion 333. The fourth side wall 34 corresponds to an outer wall, and the main drain pipe of the drain line 21 is connected to an outdoor drain stand pipe through the fourth side wall 34. The drainage pipes of other bathrooms on the same floor are intersected in the first area 6 and communicated with the branch pipes of the drainage pipeline 21, and the wastewater of other bathrooms is uniformly discharged to the outdoor drainage vertical pipe through the drainage pipeline 21 in the prefabricated floor slab 1.

According to yet another aspect of the present invention, there is provided a prefabricated kitchen floor installation structure. Referring to fig. 2 and 5, the prefabricated bath kitchen floor slab comprises a cast-in-place floor slab part 15 and a cast-in-place exterior wall part 16, wherein a first steel bar 7, a second steel bar 8 and a fifth steel bar 11 are anchored in the cast-in-place floor slab part 15, the third steel bar 9 and the fourth steel bar 10 are vertically bent upwards, the third steel bar 9 and the fourth steel bar 10 are anchored in the cast-in-place exterior wall part 16, the cast-in-place floor slab part 15 comprises a horizontal floor slab part 151 and a sunken floor slab part 152, the first steel bar 7 and the second steel bar 8 are anchored in the horizontal floor slab part 151, the fifth steel bar 11 is anchored in the sunken floor slab part 152, the horizontal floor slab part 151 and the sunken floor slab part 152 are connected by a vertical side plate 153, the sunken floor slab part 152 is further connected with the cast-in-place exterior wall part 16, the sunken floor slab part 152, the side plate 152 and the cast-, one end of the passage slot 17 communicates with the first zone 6. The first reinforcing bar 7, the second reinforcing bar 8 and the fifth reinforcing bar 11 may be directly inserted into the cast-in-place part 15 of the floor slab, or may be bound with reinforcing bars in the cast-in-place part 15 of the floor slab by using steel wires. The third reinforcing steel bar 9 and the fourth reinforcing steel bar 10 are directly inserted into the cast-in-place part 16 of the exterior wall, or are bound with the reinforcing steel bars in the cast-in-place part 16 of the exterior wall by steel wires. The mounting structure of the present embodiment has almost no joint, and water accumulated in the bath room does not permeate into other rooms or downstairs. A sunken channel groove 17 is formed against the wall root for arranging and connecting the drain pipes of different bathrooms. For example, the drainage pipes from other bathrooms are arranged along the passage grooves 17 and extended into the first section 6, and the branch pipes of the drainage pipes 21 in the prefabricated floor slab 1 are extended into the first section 6 through the second section 332 or the third section 333 and communicated with the drainage pipes from other bathrooms, so that the communication between different bathrooms is realized, and further, the waste water from other bathrooms is uniformly discharged to the outside through the drainage pipes 21 of the prefabricated floor slab 1.

According to another aspect of the present invention, there is provided a method for constructing a prefabricated kitchen floor, referring to fig. 6, comprising the steps of:

s10: in a factory, installing an external mold, arranging reinforcing steel bars, installing a lamp throat and a drain pipe embedded part according to the shape of a prefabricated floor slab 1, then installing an internal mold, pouring concrete into the mold, and removing the external mold and the internal mold after the concrete is solidified to obtain the prefabricated floor slab 1, wherein the prefabricated floor slab 1 comprises a bottom plate 2 and a side wall 3 extending upwards from the periphery of the bottom plate 1, a groove 4 with an upward opening is formed on the bottom plate 1 and the side wall 3, and a short wall 5 formed by integral pouring is arranged on the top surface of the side wall 3;

s20: in the factory, injecting water into the groove 4 of the precast floor slab obtained in the step S10 for leakage test, and if the precast floor slab 1 does not leak after a preset time, executing the step S30;

s30: in a factory, coating waterproof paint on the inner wall of the prefabricated floor slab 1, and arranging a protective layer on the surface of the waterproof paint layer;

s40: arranging a drainage pipeline in the tank 4 in a factory, performing a water pressure test, and executing the step S50 if the water pressure test is qualified;

s50: in the factory, the groove 4 is backfilled with filler;

s60: and (4) hoisting the prefabricated floor slab 1 obtained in the step (S50) to a preset position of a floor, installing a support at the bottom of the prefabricated floor slab 1, and then pouring a floor slab cast-in-place part 15 and an outer wall cast-in-place part 16, so that the steel bars extending out of the periphery of the prefabricated floor slab 1 are anchored into the floor slab cast-in-place part 15 and the outer wall cast-in-place part 16.

The lamp throat is a pipeline for electric power or telecommunication wires to pass through, and is arranged according to an electric power arrangement drawing, which is not described again here. The drain pipe embedded part is arranged at the position where the drain pipeline is connected with the prefabricated floor slab 1. In step S20, the time for the leak test may be 24 hours, for example, if the water injection test of precast floor slab 1 results in a leak, the precast floor slab 1 needs to be repaired, and in a serious case, even discarded. In step S40, the drainage pipeline 21 is arranged in the tank 4 according to the design drawing of the floor drainage scheme, and the water pressure test is performed by using the prior art, and if the water pressure test is not qualified, the drainage pipeline 21 needs to be arranged again, which is not described herein again. In step S50, the filler is mainly cement or sand, and other materials such as slag and brick slag may be used, and the surface of the filler is sealed with concrete. In step S60, the precast floor slab 1 of the above-described embodiment will be described as an example. And bending the third steel bars 9 and the fourth steel bars 10 upwards by 90 degrees, hoisting the prefabricated floor slab in place, and installing supports, such as scaffolds, at the bottom of the prefabricated floor slab. The first steel bars 7, the second steel bars 8 and the fifth steel bars 11 extend horizontally, a floor slab cast-in-place part 15 and an outer wall cast-in-place part 16 are cast in place, so that the first steel bars 7, the second steel bars 8 and the fifth steel bars 11 are anchored into the floor slab cast-in-place part 15, the third steel bars 9 and the fourth steel bars 10 are anchored into the outer wall cast-in-place part 16, the outer wall of the side wall 3 extends into the outer wall cast-in-place part 16, the extending depth is about 30mm, and the top surface of the side wall 3 is flush with the upper surface of the floor.

Prefabricated bath floor is the preparation in the mill, compares in situ casting's bath floor, and its benefit lies in: (1) the short wall 5 is integrally cast, and the corners where the bottom of the prefabricated floor slab 1 is connected with the outer wall are also integrally cast, so that seams of the positions are eliminated, and water accumulated in a bathroom is prevented from flowing to other rooms and downstairs; (2) the prefabricated bath and kitchen floor slabs are produced in batches in a factory, the production efficiency is high, and the prefabricated bath and kitchen floor slabs are conveyed to a site to be directly installed, so that the site construction period is shortened; (3) the standardization is easy to realize in a factory, the quality of the prefabricated floor slab is easy to guarantee, and the unqualified product is directly scrapped in the factory without delaying the construction period; (4) the work of the die, the steel bar rolling, the lamp throat pipe installation, the water pipe installation, the waterproof treatment and the like is finished in a factory, and the work is not required to be carried out on a construction site, so that the construction progress is greatly accelerated; (5) the arrangement and the use amount of the steel rolling ribs, the lamp throats, the water pipes and the like are known in advance in a factory, the purchase and the use amount of the materials can be reasonably planned, and the waste of the materials is reduced.

In certain embodiments, the water-resistant coating is a polyurethane-based water-resistant coating or a JS water-resistant coating. The polyurethane waterproof paint is one kind of single component waterproof polyurethane paint prepared with isocyanate group-containing prepolymer prepared through addition polymerization of isocyanate, polyether, etc. and through mixing with catalyst, anhydrous assistant, anhydrous stuffing, solvent, etc. The JS waterproof paint is a polymer cement waterproof paint, which is a two-component and water-based building waterproof paint prepared by reasonably proportioning and compounding organic liquid materials composed of polymer emulsions such as polyacrylate emulsion, ethylene-vinyl acetate copolymer emulsion and the like and various additives, and inorganic powder materials composed of inorganic fillers such as cement, quartz sand, light and heavy calcium carbonate and the like and various additives. The waterproof coating is selected from a commercial brand, such as Drizoro MAXSEAL FLEX, and comprises a component A and a component B, wherein the component A comprises water-based acrylate, and the component B comprises special cement, additives and aggregate. It goes without saying that in a specific construction project, different waterproof paint brands can be selected according to specific specification requirements.

In certain embodiments, the protective layer is a mixture of cement and sand, and the protective layer has a thickness of 3 to 5 cm. The weight ratio of the cement to the sand material of the protective layer is 1: 3. The protective layer is used for protecting the waterproof layer and preventing other parts or fillers used in construction engineering from damaging the waterproof layer.

In some embodiments, referring to fig. 7, in step S30, the waterproof layer construction method includes the steps of:

s301: cleaning the inner surfaces of the trough 4 and the low wall 5;

s302: wetting the inner surfaces of the trough 4 and the low wall 5 with water, but not accumulating water;

s303: brushing a first layer of waterproof paint on the inner surface of the prefabricated floor slab 1 by a roller, wherein the brushing thickness is 1-1.5mm, the brushing sequence is from the inner wall of the short wall 5 to the inner wall of the side wall 3 to the inner surface of the bottom plate 2, any extension is subjected to 100mm waterproof closing, and the waterproof closing is naturally dried for 2-8 hours;

s304: coating a second layer of waterproof paint on the surface of the first layer of waterproof layer by using a roller, wherein the coating thickness is 1-1.5 mm;

s305: and naturally drying after finishing brushing.

According to the waterproofing method of steps S301 to S305, good waterproofing performance can be obtained. It goes without saying that the above-described waterproofing method is only an example, and that in a specific application, different waterproofing steps are required according to the specific requirements of different waterproofing paints.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.