CN106638645B - Basement bottom board catch pit steel mesh is layered precast construction and method of construction - Google Patents

Abstract

The invention discloses a layered prefabricated structure and a construction method of reinforcement mesh for a basement sump pit. By layering and prefabricating the bottom of the sump pit and the steel mesh on the surface of the sump in advance at the project site or in a processing plant, the water collecting pit is firstly moved by a tower crane. The steel mesh at the bottom of the pit slab is hoisted on the cushion or brick tire mold of the sump, and then the steel mesh on the slab surface of the sump is hoisted on the steel mesh at the bottom of the sump pit, assembled into a whole in the pit, and the prefabricated steel bars are manually connected Mesh and surrounding bottom plate reinforcement, and finally the construction process of pouring concrete. Due to separate prefabrication, it can effectively reduce a large number of on-site steel bar binding work in the sump, improve construction efficiency, and shorten the construction period, and prefabrication in advance is conducive to improving the positioning and connection accuracy of steel bars, thus solving the poor working conditions of steel bar binding in the sump. The problem of difficult positioning and cumbersome construction avoids the problem of excessive hoisting quality caused by the prefabricated steel mesh at the bottom of the sump slab and the overall prefabrication of the steel mesh on the slab surface of the sump pit.

Description

Layered Prefabricated Structure and Construction Method of Reinforced Mesh for Basement Floor Sump Pit

technical field

The invention belongs to the construction field of the building industry, in particular to the technical field of basement floor sump construction technology.

Background technique

With the continuous emergence of high-rise and super high-rise buildings, the problem of waterproofing in basements has become more and more prominent. A common waterproof method for the basement is to set a sump on the base plate, concentrate the water in the deep pit of the base plate, that is, the sump, and then discharge the water with a unified water pump.

The sump structure of the existing basement floor includes two major parts of the bottom plate and the surface of the plate. The traditional construction process is: 1) dig a hole first, and make a cushion or brick tire mold for the sump; 2) move the processed steel bars into the pit one by one, position and connect the steel bars one by one to form a sump 3) Pouring concrete.

This construction technique has the following disadvantages: 1) The construction period is long. For super high-rise or high-rise buildings, it is particularly important to form the foundation pit floor as soon as possible for the safety and stability of the foundation pit; Efficiency is low; 3) working condition of reinforcing bar binding in sump pit is poor, reinforcing bar location is difficult, and construction is loaded down with trivial details.

Therefore, how to provide a layered prefabricated structure and construction method of steel mesh in the basement sump pit that can avoid binding steel bars in the pit, have high construction efficiency, short construction period, and ensure the quality of steel bar connection has become an issue that needs to be further improved and optimized by the construction industry. technical problem.

Contents of the invention

In view of the above-mentioned defects in the prior art, the object of the present invention is to provide a layered prefabricated structure and construction method of steel mesh in the sump pit of the basement floor, which solves the problem of difficulty in tying steel bars one by one in the sump pit of the basement floor, low construction efficiency, Technical problems such as long construction period and difficulty in guaranteeing connection quality.

In order to solve the above technical problems, the present invention provides the following technical solutions:

A layered prefabricated structure of reinforcement mesh for a sump pit on a basement floor, which is used for a sump on a construction floor, including: a prefabricated steel mesh at the bottom of a sump pit slab bottom at a construction site or in a processing plant and a collection pit with a steel support fixed at its lower part. The reinforced mesh on the surface of the sump, the reinforced mesh at the bottom of the sump is a basin-shaped structure, and the reinforced mesh at the bottom of the sumps is laid on the cushion layer or brick tire mold of the proposed sump, and the water-collected The reinforced mesh on the surface of the pit plate is erected above the reinforced mesh at the bottom of the sump plate through the steel bar bracket. The surface reinforcement mesh is connected with the surface reinforcement of the bottom plate around the sump correspondingly one by one.

Preferably, in the layered prefabricated structure of the basement floor sump reinforcement mesh, the bottom reinforcement mesh of the sump pit includes a horizontal bottom reinforcement mesh and side reinforcement meshes located around the horizontal bottom reinforcement mesh, and the side portions The reinforcement mesh is arranged obliquely upward, and the obliquely upward reinforcement in the side reinforcement mesh is correspondingly cross-anchored and connected with the bottom reinforcement of the bottom plate around the sump pit.

Preferably, in the layered prefabricated structure of the basement floor sump reinforcement mesh layered above, the sump surface reinforcement mesh includes a horizontal reinforcement mesh at the bottom of the pit, a vertical reinforcement mesh at the pit wall and a horizontal reinforcement mesh at the top of the pit. The vertical steel mesh on the pit wall is arranged around the horizontal steel mesh at the bottom of the pit. The ports are matched and fixedly connected, and the steel bars at the outer ring of the horizontal steel mesh on the top of the pit are connected with the bottom plate surface steel bars around the sump correspondingly one by one.

Preferably, in the layered prefabricated structure of the basement floor sump reinforcement mesh, the horizontal bottom reinforcement mesh is rectangular, and the reinforcement support includes a rectangular top steel ring and four vertical corner steel rings. The shape and size of the top section steel ring correspond to the horizontal bottom reinforcement mesh of the sump slab bottom reinforcement mesh, and the four vertical corner section steels are fixedly arranged on the four corners of the rectangular top section steel ring. Below the corner, the lower ends of the four vertical corner section steels are set at the four corners of the horizontal bottom reinforcement mesh of the sump slab bottom reinforcement mesh, and the rectangular top section steel rings are supported on the set The lower surface of the pit top horizontal reinforcement mesh of the puddle slab reinforcement mesh.

Preferably, in the above-mentioned layered prefabricated structure of reinforced mesh in the basement sump pit, the steel bar support further includes four vertical middle section steels, and the vertical middle section steels are respectively arranged on the four rectangular top section steel rings. below the middle of the edge.

Preferably, in the layered prefabricated structure of the basement floor sump reinforcement mesh, the lower end of each vertical middle section steel is respectively connected to the two ends on the same side of the rectangular top section steel ring through two diagonal braces.

Preferably, in the layered prefabricated structure of the basement floor sump reinforcement mesh layered structure, a number of plate top suspension rings are also included, and the plate top suspension rings are fixed on the vertical corner section steel through connecting rods, or connected The rod is fixed on the vertical middle section steel.

Preferably, in the layered prefabricated steel mesh structure of the sump pit on the basement floor, four corners of the side steel mesh are provided with a slab bottom suspension ring.

Preferably, in the above-mentioned layered prefabricated structure of reinforced mesh in the sump pit on the basement floor, the reinforced mesh at the bottom of the sump pit is processed by means of a steel frame, and the reinforced frame is composed of four sets of supporting frames, each The set of supporting frames includes at least three pairs of right-angled triangular steel frames arranged vertically at intervals and a pair of parallel bar-shaped steel frames. The hypotenuse shaped steel of the right-angled triangular frame is set inside, and each horizontal right-angled shaped steel in each group of support frames is connected by a pair of parallel strip shaped steel.

The present invention also discloses a layered prefabricated construction method of reinforced mesh in a sump pit of a basement floor, which adopts the layered prefabricated structure of reinforced mesh in a sump pit of a basement floor as described above, including the following steps:

Step 1, sump reinforcement mesh design;

Step 2, prefabricated processing of prefabricated steel mesh in the sump, the steel mesh in the sump includes the steel mesh at the bottom of the sump plate, and the steel mesh on the surface of the sump plate with the reinforcement bracket fixed at the bottom;

Step 3, layered hoisting and assembly of the prefabricated steel mesh in the sump pit: first hoist the steel mesh at the bottom of the sump pit, and then hoist the steel mesh on the bottom of the sump pit with the steel bracket fixed at the lower part, so that the steel mesh at the bottom of the sump pit and the steel mesh at the bottom of the sump pit The steel mesh on the surface of the sump is arranged in the sump in sequence from bottom to top;

Step 4: Connect the reinforcement mesh at the bottom of the sump pit with the steel bars at the bottom of the bottom slab around the sump correspondingly, and connect the steel mesh at the bottom of the sump pit with the reinforcement at the bottom of the bottom slab around the sump pit;

Step 5: Pouring the concrete of the bottom slab with the sump.

Preferably, in the above-mentioned layered prefabricated construction method of the basement floor sump reinforcement mesh, before the third step, control lines are drawn on the four corners of the pad or brick mold of the sump to be built, and the hoisting During the process, the bottom four corners of the reinforcement mesh at the bottom of the sump pit are aligned with the control line on the cushion layer to complete the precise positioning of the reinforcement mesh at the bottom of the sump pit.

As can be seen from the technical solutions disclosed above, compared with the prior art, the beneficial effects of the present invention are as follows:

The invention provides a layered prefabricated structure and construction method of basement floor sump reinforcement mesh, which can effectively reduce the A large amount of on-site steel binding workload in the sump improves construction efficiency and shortens the construction period, and prefabrication in advance is conducive to improving the positioning and connection accuracy of the reinforcement mesh in the basement floor sump and the reinforcement mesh in the sump surface, which solves the problem of centralized The working conditions of the steel bar binding in the puddle are poor, the positioning of the steel bar is difficult, and the construction is cumbersome. For super high-rise or high-rise buildings, the foundation pit floor can be formed as soon as possible to ensure the safety and stability of the foundation pit. In addition, the prefabricated sump slab bottom reinforcement mesh and the sump slab surface reinforcement mesh with steel brackets fixed at the lower part are separated by layering, which avoids the overall prefabrication of the sump bottom slab reinforcement mesh and sump slab surface reinforcement mesh. The lifting quality caused by the combination is too large.

Description of drawings

Fig. 1 is a structural schematic diagram of a layered prefabricated structure of a basement floor sump reinforcement mesh according to an embodiment of the present invention.

Fig. 2 is a structural schematic diagram of the reinforcement mesh and the reinforcement frame at the bottom of the sump slab in an embodiment of the present invention.

Fig. 3 is a schematic diagram of the structure of the reinforcement mesh on the surface of the sump pit in an embodiment of the present invention (the hanging ring on the top of the slab is not shown).

Fig. 4 is a three-dimensional schematic view of hoisting the reinforcement mesh at the bottom of the sump slab in an embodiment of the present invention.

Fig. 5 is a schematic diagram of the structure when hoisting the reinforcement mesh at the bottom of the sump slab in an embodiment of the present invention.

Fig. 6 is a three-dimensional schematic view of hoisting the reinforcement mesh on the surface of the sump pit in an embodiment of the present invention.

Fig. 7 is a schematic diagram of the structure when hoisting the reinforcement mesh on the surface of the sump pit in an embodiment of the present invention.

Fig. 8 shows the corresponding connection of the steel mesh at the bottom of the sump and the steel bars at the bottom of the bottom of the sump and the corresponding connection of the steel mesh at the bottom of the sump with the reinforcement of the bottom of the bottom of the sump in one embodiment of the present invention. Schematic diagram of the subsequent structure.

In the figure: 100-prefabricated steel mesh for sump, 1-slab bottom steel mesh for sump, 11-horizontal bottom steel mesh, 12-side steel mesh, 13-slab bottom suspension ring, 2-steel support, 21- Rectangular top section steel rim, 22-vertical corner section steel, 23-vertical middle section section steel, 24-diagonal bracing, 3-sump surface reinforcement mesh, 31-pit bottom horizontal reinforcement mesh, 32-pit wall vertical Reinforcement mesh, 33-pit top horizontal reinforcement mesh, 35-slab top suspension ring, 4-cushion layer or brick tire mold, 5-bottom plate bottom reinforcement around sump pit, 6-bottom plate surface reinforcement around sump pit, 71 -Right triangle steel frame, 72-strip steel, 8-sling.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. The technical content and features of the present invention will be described in detail below by referring to the illustrated embodiments in conjunction with the accompanying drawings. It should be further noted that all the drawings are in very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. For the convenience of description, the "up" and "down" described below are consistent with the directions of up and down in the drawings, but this should not be a limitation of the technical solution of the present invention.

Embodiment one

Please refer to Fig. 1 to Fig. 8, this embodiment discloses a layered prefabricated structure of basement floor sump reinforcement mesh, which is used for the sump on the construction floor, including: prefabricated water collection at the construction site or processing plant The reinforcement mesh 1 at the bottom of the pit slab and the reinforcement mesh 3 on the surface of the sump slab with the steel support 2 fixed at the lower part, the reinforcement mesh 1 at the bottom of the slab of the sump and the reinforcement mesh 3 at the surface of the sump slab with the steel support 2 fixed at the lower part are collectively referred to as Prefabricated reinforcement mesh 100 for sump pit. The reinforcement mesh 1 at the bottom of the sump is in a basin-like structure, and the reinforcement mesh 1 at the bottom of the sump is laid on the cushion layer or the brick tire mold 4 of the sump to be built, and the reinforcement on the surface of the sump The net 3 is erected above the reinforcement mesh 1 at the bottom of the sump through the steel bar bracket 2, and the reinforcement mesh 1 at the bottom of the sump is connected with the steel bars 5 at the bottom of the bottom of the sump correspondingly one by one. The reinforcement mesh 3 on the surface of the plate is connected correspondingly with the reinforcement bars 6 on the surface of the bottom plate around the sump pit one by one.

The present invention provides a layered prefabricated structure and a construction method for a basement floor sump reinforcement mesh. By layering, the prefabricated sump slab bottom reinforcement mesh 1 and the sump surface reinforcement mesh 3 fixed with a reinforcement bracket 2 are separated. It can effectively reduce a large number of on-site steel binding work in the sump, improve construction efficiency, shorten the construction period, and can form the foundation pit floor as soon as possible, which can ensure the safety and stability of the foundation pit. It is especially important for super high-rise or high-rise buildings, and prefabrication is beneficial Improve the positioning and connection accuracy of steel reinforcement mesh in the sump pit on the basement floor and reinforcement mesh 3 on the surface of the sump pit, thereby solving the problems of poor binding conditions for reinforcement in the sump pit, difficult reinforcement positioning, and cumbersome construction. In addition, by layering, that is, separating the steel mesh 1 at the bottom of the prefabricated sump slab and the steel mesh 3 on the slab surface of the sump with the steel support 2 fixed at the lower part, it avoids the prefabricated steel mesh 1 at the bottom of the sump slab and the slab surface of the sump pit. The problem of excessive hoisting quality caused by the overall prefabrication of the steel mesh 3 improves the safety of construction.

Preferably, in the layered prefabricated structure of the basement floor sump reinforcement mesh in this embodiment, the sump slab bottom reinforcement mesh 1 includes a horizontal bottom reinforcement mesh 11 and sides located around the horizontal bottom reinforcement mesh 11. The upper reinforcement mesh 12, that is to say, the bottom reinforcement mesh 1 of the sump plate is formed by bending its surroundings obliquely upwards by a horizontal reinforcement mesh, the side reinforcement mesh 12 is arranged obliquely upward, and the side reinforcement mesh 12 The steel bars slanted upwards are connected with the steel bars 5 at the bottom of the bottom slab around the sump pit through artificial corresponding cross-anchoring. In order to facilitate hoisting of the reinforcement mesh 1 at the bottom of the sump, a bottom suspension ring 13 is provided on the four corners of the side reinforcement mesh 12 .

Preferably, in the layered prefabricated structure of the basement floor sump reinforcement mesh in this embodiment, the sump surface reinforcement mesh 3 includes a pit bottom horizontal reinforcement mesh 31, a pit wall vertical reinforcement mesh 32 and a pit top Horizontal reinforced mesh 33, the vertical reinforced mesh 32 of the pit wall is arranged around the horizontal reinforced mesh 31 at the bottom of the pit, the horizontal reinforced mesh 33 on the top of the pit is "back-shaped", and the inner ring of the horizontal reinforced mesh 33 on the pit top It is matched with and fixedly connected to the upper port of the vertical steel mesh 32 on the pit wall, and the steel bars at the outer circle of the horizontal steel mesh 33 on the pit roof are connected with the steel bars 6 on the bottom plate surface around the sump correspondingly one by one. When the corresponding connection is made one by one, it can be connected by welding process or straight thread connection. For steel bars larger than 16mm, it can be directly connected by straight thread sleeve, which can improve the connection efficiency while ensuring the connection strength.

Preferably, in the reinforcement mesh 3 on the surface of the sump pit, the horizontal reinforcement mesh 31 at the bottom of the pit and the horizontal bottom reinforcement mesh 11 are both rectangular, and the reinforcement support 2 includes a rectangular top shaped steel ring 21 and four vertical To the corner shaped steel 22, the shape and size of the rectangular top shaped steel ring 21 correspond to the horizontal bottom reinforced mesh 11 of the sump bottom steel mesh 1, and the four vertical corner shaped steel 22 It is fixedly arranged under the four corners of the rectangular top steel ring 21, and the lower ends of the four vertical corner steel rings 22 are arranged on the horizontal bottom steel mesh 11 of the bottom steel mesh 1 of the sump pit. At the four corners, the rectangular top shaped steel ring 21 is supported on the lower surface of the pit top horizontal steel mesh 33 of the sump surface steel mesh 3 .

Preferably, in order to improve the strength of the steel bar support 2 and realize a more stable support for the reinforcement mesh 3 on the surface of the sump pit, the steel bar support 2 also includes four vertical middle section steels 23, and the vertical middle section steel sections 23 are respectively It is arranged below the middle part of the four sides of the rectangular top shaped steel ring 21 . The lower end of each vertical middle section steel 23 is respectively connected to the two ends of the same side on the rectangular top section steel ring 21 through two diagonal braces 24 .

Preferably, in order to facilitate the hoisting of the steel mesh 3 on the surface of the sump pit, in this embodiment, a number of plate top hanging rings 35 are also included, and the plate top hanging rings 35 are fixed to the vertical corners through connecting rods. on the section steel 22, or be fixed on the vertical middle section section steel 23 by connecting rods.

Preferably, in order to improve the manufacturing accuracy and manufacturing efficiency of the steel mesh 1 at the bottom of the sump pit, in the layered prefabricated structure of the steel mesh at the bottom of the basement sump according to this embodiment, the steel mesh 1 at the bottom of the sump pit is The reinforced tire frame is processed and manufactured, and the reinforced tire frame is composed of four sets of support frames, each set of support frames includes at least three pairs of right-angled triangle steel frames 71 arranged at vertical intervals and a pair of parallel strip shaped steel 72, each The right-angled triangle steel frame 71 is surrounded by hypotenuse section steel, horizontal section steel and vertical section steel. A pair of parallel bar shaped steel 72 is connected. The slope of the hypotenuse section steel is the same as that of the side reinforcement mesh 12 of the bottom reinforcement mesh 1 of the sump pit, which is used to stably support the side reinforcement mesh 12 of the bottom reinforcement mesh 1 of the sump pit to realize the reinforcement mesh at the bottom of the sump pit. 1 and the precise positioning of the horizontal bottom reinforcement mesh 11, and the rapid prefabrication of the sump slab bottom reinforcement mesh 1.

Embodiment two

Please continue to refer to Fig. 1 to Fig. 8, this embodiment also discloses a layered prefabricated construction method of reinforced mesh in the basement sump pit, adopting the layered prefabricated structure of the reinforced mesh in the basement sump pit as described in the first embodiment, Including the following steps:

Step 1, sump reinforcement mesh design. The design of the sump reinforcement mesh includes determining the scope of the prefabrication of the sump pit and the reinforcement around the pit, the prefabricated reinforcement mesh (that is, the sump pit reinforcement mesh, including the bottom reinforcement mesh 1 of the sump pit and the water collection pit with the reinforcement bracket 2 fixed at the bottom 3) Cutting and arrangement of reinforced mesh on pit slab surface, design and arrangement of reinforced support 2, design and checking calculation of steel mesh hook, checking calculation of steel mesh hoisting, etc. Among them, it is necessary to comprehensively consider the range of prefabricated steel mesh in terms of the hoisting capacity of the tower crane, the difficulty of binding steel bars in the sump, the prefabrication of the overall steel mesh in the pit, the connection between the prefabricated steel mesh and the surrounding steel bars, and the difficulty of making the steel mesh tire frame; Cutting and arrangement include prefabricated reinforcement blanking calculation, reinforcement spatial arrangement, etc., and establishment of 3D model of prefabricated reinforcement mesh, etc.; to meet the stability and force requirements of prefabricated reinforcement mesh itself, design and layout of reinforcement support 2; in addition, In order to meet the overall hoisting requirements of the steel mesh, it is necessary to arrange additional hooks in the detailed design stage in advance, and carry out the hoisting calculation of the steel mesh. In order to meet the rigidity and strength requirements of the steel mesh hoisting, additional reinforcement is required.

Step 2: The sump prefabricated reinforcement mesh 100 is prefabricated and processed, and the sump pit reinforcement mesh includes the sump bottom reinforcement mesh 1 and the sump surface reinforcement mesh 3 with the reinforcement support 2 fixed at the bottom. Reinforced mesh processing includes the design and manufacture of reinforced mesh tire frames, the forming process of reinforced mesh, the precision control of reinforced mesh, etc. Among them, in order to meet the prefabrication requirements of the sump reinforcement mesh, it is necessary to design and manufacture a steel mesh high-precision tire frame on the project site or in the processing plant. The shape and size of the tire frame need to be determined according to the shape and size of the prefabricated steel mesh. At the project site or in the processing factory, first set up the steel mesh tire frame to prefabricate the steel mesh at the bottom of the slab, as shown in Figure 2; set up the steel bar support 2, and carry out the prefabrication of the steel mesh 3 on the surface of the sump pit, as shown in Figure 3 . In addition, in the process of steel mesh processing, it is necessary to strictly control the processing accuracy of the tire frame, the blanking and installation accuracy of a single steel bar, etc.

Step 3, layered hoisting and assembling of prefabricated reinforcement mesh 100 in the sump: first hoist the reinforcement mesh 1 at the bottom of the sump slab, and then hoist the reinforcement mesh 3 on the surface of the sump slab with the reinforcement bracket 2 fixed at the lower part, so that the sump slab The bottom reinforcement mesh 1 and the sump surface reinforcement mesh 3 are sequentially arranged in the sump from bottom to top. Specifically, the prefabricated steel mesh 100 in the sump is hoisted and assembled in layers, including the determination of the hoisting scheme of the steel mesh, the precise positioning of the steel mesh 1 at the bottom of the sump pit in the sump, the reinforcement mesh 1 at the bottom of the sump pit Panel steel mesh 3 assembled. Among them, it is necessary to determine the size and weight of the reinforcement mesh 1 on the sump floor according to the hoisting capacity of the tower crane in advance, so as to take into account the hoisting capacity and the principle of prefabrication as much as possible; formulate a special plan for layered hoisting of prefabricated reinforcement meshes, and formulate corresponding emergency measures, etc., first Hoist the reinforcement mesh at the bottom of the slab, as shown in Figures 4 and 5, and then hoist the reinforcement mesh 3 on the surface of the sump pit and the lower reinforcement support 2, as shown in Figures 6 and 7.

Preferably, in the above-mentioned layered prefabricated construction method of the basement floor sump reinforcement mesh, before the step 3, control lines are drawn on the four corners of the cushion layer of the sump to be built or the brick tire mold 4, and the During the hoisting process, the bottom four corners of the steel mesh 1 at the bottom of the sump pit are aligned with the control line on the cushion layer to complete the precise positioning of the steel mesh 1 at the bottom of the sump pit. That is to say, draw the control line at the four corners or the center line of the four sides of the cushion in the sump, and during the hoisting process, the steel bars at the four corners of the steel mesh at the bottom of the slab are aligned with the control line on the cushion, and the precise positioning of the steel mesh at the bottom of the slab is completed. Utilize the tower crane to integrally hoist the reinforced mesh 3 on the surface of the sump pit and its lower steel support 2 into the pit, and the lower steel support 2 can be used for precise positioning.

Step 4: Connect the reinforcement mesh 1 at the bottom of the sump pit with the steel bars 5 at the bottom of the bottom slab around the sump correspondingly, and connect the reinforcement mesh 3 at the bottom of the sump with the steel bars 6 at the bottom of the bottom of the sump. . The connection between the prefabricated steel mesh and the surrounding bottom plate reinforcement includes connecting the four sides of the prefabricated steel mesh with the surrounding bottom plate steel bars one by one by welding or sleeve connection. The welding process can be used to connect the steel bars or the steel bars larger than 16mm can be directly connected by straight thread sleeves. As shown in Figure 8.

Step 5: Pouring the concrete of the bottom slab with the sump.

The layered prefabrication construction method of the reinforcement mesh of the sump pit of the basement floor of the present invention is to prefabricate the bottom of the sump pit and the reinforcement mesh on the surface of the sump by layering in advance at the project site or in the processing plant, and use the tower crane to place the bottom reinforcement mesh 1 and the bottom of the sump pit. The reinforcement mesh on the surface of the sump pit is hoisted into the pit separately, assembled into a whole in the pit, placed on the cushion layer or brick tire form of the sump pit, the prefabricated reinforcement mesh and the surrounding bottom plate reinforcement are manually connected, and the construction process of finally pouring concrete is due to Layering means separating the prefabricated sump slab bottom reinforcement mesh 1 and the sump slab surface reinforcement mesh 3 with the steel support 2 fixed at the lower part, which can effectively reduce a large number of on-site reinforcement work in the sump pit, improve construction efficiency, and shorten the construction period , the foundation pit floor can be formed as soon as possible, which can ensure the safety and stability of the foundation pit, and the prefabrication in advance is conducive to improving the positioning and connection accuracy of the reinforcement mesh 1 at the bottom of the sump pit and the reinforcement mesh 3 on the surface of the sump pit, thus solving the problem of centralized The working conditions of the steel bar binding in the puddle are poor, the positioning of the steel bar is difficult, and the construction is cumbersome. In addition, by layering, that is, separating the steel mesh 1 at the bottom of the prefabricated sump slab and the steel mesh 3 on the slab surface of the sump with the steel support 2 fixed at the lower part, it avoids The problem of excessive hoisting quality caused by the overall prefabrication of the steel mesh 3 improves the safety of construction.

The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention. Any changes and modifications made by those of ordinary skill in the field of the present invention based on the above disclosures shall fall within the protection scope of the claims.

Claims (7)

1. a layered prefabricated structure of basement floor sump reinforcement mesh, which is used for the sump on the construction floor, is characterized in that, comprising: prefabricated reinforcement mesh at the bottom of the sump slab and the bottom at the construction site or processing plant in advance The reinforced mesh on the plate surface of the sump is fixed with a steel support. The reinforced mesh at the bottom of the sump is in a pot-shaped structure. Above, the reinforcement mesh on the surface of the sump pit is erected above the reinforcement mesh at the bottom of the sump pit through the steel bar bracket, and the reinforcement mesh at the bottom of the sump pit is connected with the reinforcement bars on the bottom of the bottom of the sump pit one by one. The reinforcement mesh on the surface of the sump is connected with the steel reinforcement on the bottom plate around the sump correspondingly one by one, and the reinforcement mesh on the bottom of the sump includes a horizontal bottom reinforcement mesh and a side reinforcement mesh located around the horizontal bottom reinforcement mesh, The side reinforcement mesh is arranged obliquely upward, and the obliquely upward reinforcement in the side reinforcement mesh is correspondingly cross-anchored and connected with the bottom reinforcement of the bottom plate around the sump pit, and the sump surface reinforcement mesh includes a horizontal reinforcement mesh at the bottom of the pit , the vertical steel mesh on the pit wall and the horizontal steel mesh on the top of the pit, the vertical steel mesh on the pit wall is arranged around the horizontal steel mesh on the bottom of the pit, the horizontal steel mesh on the top of the pit is "back-shaped", and the top of the pit is horizontal The inner ring of the steel mesh matches and is fixedly connected to the upper port of the vertical steel mesh on the pit wall, and the steel bars at the outer ring of the horizontal steel mesh on the top of the pit are connected with the steel bars on the bottom plate surface around the sump correspondingly one by one. The horizontal bottom reinforcement mesh is rectangular, and the reinforcement support includes a rectangular top steel ring and four vertical corner steel rings. Corresponding to the horizontal bottom steel mesh, the four vertical corner section steels are fixedly arranged under the four corners of the rectangular top section steel rim, and the lower ends of the four vertical corner section steels are arranged on the water collecting The four corner positions of the horizontal bottom steel mesh of the bottom steel mesh of the pit slab, the rectangular top section steel ring is supported on the lower surface of the pit top horizontal steel mesh of the sump surface steel mesh, and the side The four corners of the steel mesh are provided with a plate bottom suspension ring. 2. The layered prefabricated structure of the basement floor sump reinforcement mesh as claimed in claim 1, wherein the reinforcement support also includes four vertical middle section steels, and the vertical middle section steel sections are respectively arranged on the rectangular Below the middle of the four sides of the top shaped steel ring, the lower end of each vertical middle shaped steel is respectively connected to the two ends of the same side on the rectangular top shaped steel ring through two diagonal braces. 3. The layered prefabricated structure of basement floor sump reinforcement mesh as claimed in claim 2, further comprising a plurality of slab top suspension rings, and the slab top suspension rings are fixed to the vertical corners by connecting rods on the profiled steel, or be fixed on the vertical middle profiled steel by a connecting rod. 4. The layered prefabricated structure of basement floor sump reinforcement mesh as claimed in claim 1, characterized in that . 5. The layered prefabricated structure of reinforcement mesh in the basement sump pit as claimed in claim 1, wherein the reinforcement mesh at the bottom of the sump pit is processed and manufactured by means of a steel frame, and the steel frame is supported by four groups Each set of support frames includes at least three pairs of right-angled triangular steel frames and a pair of parallel bar-shaped steel frames at vertical intervals. Each right-angled triangular steel The hypotenuse shaped steel of the right-angled triangular frame is arranged inside, and each horizontal right-angled shaped steel in each group of support frames is connected by a pair of parallel strip shaped steels. 6. A layered prefabricated construction method for basement floor sump reinforcement mesh, characterized in that, adopting the layered prefabrication structure of basement floor sump reinforcement mesh reinforcement mesh as described in any one of claims 1-5, comprising the following steps : Step 1, sump reinforcement mesh design; Step 2, prefabricated processing of prefabricated steel mesh in the sump, the steel mesh in the sump includes the steel mesh at the bottom of the sump plate, and the steel mesh on the surface of the sump plate with the reinforcement bracket fixed at the bottom; Step 3, layered hoisting and assembly of the prefabricated steel mesh in the sump pit: first hoist the steel mesh at the bottom of the sump pit, and then hoist the steel mesh on the bottom of the sump pit with the steel bracket fixed at the lower part, so that the steel mesh at the bottom of the sump pit and the steel mesh at the bottom of the sump pit The steel mesh on the surface of the sump is arranged in the sump in sequence from bottom to top; Step 4: Connect the reinforcement mesh at the bottom of the sump pit with the steel bars at the bottom of the bottom slab around the sump correspondingly, and connect the steel mesh at the bottom of the sump pit with the reinforcement at the bottom of the bottom slab around the sump pit; Step 5: Pouring the concrete of the bottom slab with the sump. 7. The layered prefabricated construction method of the basement sump sump reinforcement mesh as claimed in claim 6, characterized in that, before the step 3, four corners of the cushion layer or the brick tire formwork of the sump to be built Draw the control line, and use the bottom four corners of the steel mesh at the bottom of the sump pit to align with the control line on the cushion during the hoisting process to complete the precise positioning of the steel mesh at the bottom of the sump pit.