Basement prestressed hollow slab drainage construction method based on SPD slab

Abstract

The invention relates to a drainage construction method for a basement prestressed hollow slab based on an SPD slab. The drainage construction method comprises the steps that firstly, the SPD slab is hoisted; step 2, supporting; thirdly, slab joint pouring is conducted; step 4, hole blocking; step 5, opening holes; sixthly, corner cutting is conducted; and step 7, laying a plate pipeline. According to the invention, the influence of load and natural environment can be stably borne for a long time, the erosion and damage of various natural forces such as wind, water and fire can be effectively resisted, and the use function of a building is ensured.

Description

Technical Field

[0001] The invention relates to the field of building engineering construction, in particular to a drainage construction method of a basement prestressed hollow slab based on an SPD slab. Background Art

[0002] Due to the special building structure of the project, the main body is the third underground floor, which is a moisture-proof overhead floor. The overhead floor uses SPD prestressed hollow slabs. In the past, the overhead floor of the building used cast-in-place concrete structure. Since the cultural relics restoration room has high requirements for waterproofing and anti-seepage, if the overhead floor of the building adopts cast-in-place concrete structure, it needs to be constructed on site, which makes its construction process relatively complicated, requiring multiple processes and a long curing time, thereby increasing the complexity and duration of the construction. In addition, due to the characteristics of the concrete structure, it may also use a large number of formworks, which not only increases the cost, but also may cause quality problems due to improper use of the formwork. Especially when the concrete volume is large or the curing condition is poor, the structure is prone to cracking, which not only affects the appearance quality of the structure, but also may affect the overall performance of the structure. Summary of the invention

[0003] The present invention aims to overcome the defects of the prior art and provide a basement prestressed hollow slab drainage construction method based on SPD boards to solve the problem of building wall drainage.

[0004] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: A basement prestressed hollow slab drainage construction method based on SPD board, characterized in that it includes the following steps: Step 1: Hoist the SPD board; Step 2: Support; Step 3: pouring the plate seams; Step 4: plug the hole; Step 5: Drill the hole; Step 6: Cut corners; Step 7: Laying of board pipelines.

[0005] The method for constructing a basement prestressed hollow slab drainage system based on an SPD board is characterized in that: in step one, the SPD board is transported to the construction site and installed in time. For those that cannot be installed in time, the site must be flat and solid when stacking. Full-length pads are used, and the pads are placed to the left and right of the board ends. The pads are aligned up and down, and the inverted "eight" phenomenon is strictly prohibited, and the stacking height is controlled; the SPD board hanging point is located at a distance from the board end, and the angle of the hanging rope is not less than 60 degrees to prevent the hanging rope from slipping inward.

[0006] The method for constructing a prestressed hollow slab drainage system for a basement based on an SPD board is characterized in that: in step 2, a hard frame formwork is used for construction without setting up a steel pipe scaffold, and concrete is poured simultaneously with the beam, the superimposed layer, and the plate seam, and the reinforcement binding and formwork support of the corbel beam must be well controlled; The support frame adopts double-row support. Within the range of the board end, a connecting rod is set in the height direction to ensure the stability of the frame.

[0007] The above-mentioned method for drainage construction of prestressed hollow slab in basement based on SPD board is characterized in that: in step three: 1. SPD board arching requirements: The thickness of the steel bars and concrete in the laminated layer must be strictly controlled. After the slab is installed, before pouring the slab joints and beam concrete, the slab arch should be adjusted within the range by adding bricks or other heavy objects. For slabs with uneven arching, use a clamp to level them before pouring concrete. 2. Moistening before pouring: Because the superimposed layer is thin, shrinkage cracks are prone to occur. Before the superimposed layer concrete is constructed, the slab must be fully moistened, and the superimposed layer must be covered and watered to ensure the overall stress of the slab. 3. Vibration during pouring: During construction, pour the slab joint concrete in time, and take reliable measures to vibrate and compact it. The overlay layer concrete is poured after pouring the slab joint concrete.

[0008] The drainage construction method of a prestressed hollow slab in a basement based on an SPD board is characterized in that: in step four, the holes at the ends of the SPD board are easily filled with concrete slurry during concrete construction, and are easily waterlogged. The holes at both ends are blocked before hoisting, and are blocked with broken bricks and mortar. The drainage construction method of a prestressed hollow slab in a basement based on an SPD board is characterized in that: in step five, holes need to be left on the board to install ventilation equipment or power pipelines. The length of the holes is parallel to the span direction of the board, or small holes are used to minimize cutting of the prestressed tendons. When there are many holes, they are arranged along the span direction of the board and arranged in the shear zone of the board.

[0009] The method for constructing drainage of prestressed hollow slabs in basements based on SPD boards is characterized in that: in step six, when arranging the boards around the frame columns, the board ends are cut corners. Generally, the width of the cut corners does not exceed one quarter of the board width. When the width of the cut corners exceeds one quarter of the board, a calf or other form of support is provided on the bottom beam of the board.

[0010] The method for constructing drainage of prestressed hollow slab in basement based on SPD board is characterized in that: in step seven, since various pipelines cannot be laid in prefabricated boards, various pipelines need to be laid at the bottom of the board, and the installation of ceiling rods at the bottom of the board, pipeline installation hangers, and hangers need to be carried by SPD boards; for pipelines with large loads such as water supply and drainage, fire protection, etc., the hangers must penetrate the SPD board and be fixed in the laminated layer; pipelines with small loads such as ceilings, electric pipes, and air ducts can be fixed with internal expansion bolts to meet the requirements.

[0011] The beneficial effects of the present invention are as follows: It can be seen from the above technical scheme that the present application provides a basement prestressed hollow slab drainage construction method based on SPD boards. The prestressed hollow slabs have good durability, can stably withstand the influence of loads and natural environment for a long time, and can effectively resist erosion and damage from various natural forces, such as wind, water, fire, etc., thereby ensuring the use function of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of step two. DETAILED DESCRIPTION

[0013] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application. A basement prestressed hollow slab drainage construction method based on SPD board, comprising the following steps: Step 1: Hoisting; When the SPD board is transported to the construction site, it must be installed in time. For those that cannot be installed in time, the site must be flat and solid. Use full-length pads, with the pads to the left and right of the board end, and align the pads up and down. It is strictly forbidden to have the inverted eight-character phenomenon, and the stacking height must be controlled; there is no hook on the SPD board surface, and wire ropes and slings are directly used for lifting, which will cause significant damage to the ropes. The SPD board lifting point should be located to the left and right of the board end. To prevent the rope from sliding inward, the rope angle should not be less than 60 degrees.

[0014] Step 2: Support like Figure 1 As shown: adopting hard frame formwork for construction, there is no need to set up steel pipe scaffolding, pouring concrete in beams, superimposed layers and plate joints at the same time, which can speed up the construction progress and have good economic benefits. It is required to control the reinforcement binding and formwork support of the corbel beam.

[0015] The support frame adopts double-row support. Within the range of the board end, a connecting rod is set in the height direction to ensure the stability of the frame.

[0016] Step 3: Plate seam pouring 1. SPD board arching requirements The thickness of the steel bars and concrete of the laminated layer must be strictly constructed. During the production and stacking process of the slab, a certain degree of arching will occur. To ensure that the thickness of the laminated layer is not affected by the arching, after the slab is installed, before pouring the slab joints and pouring the beam concrete, the arching of the slab should be adjusted within 100% by adding bricks or other heavy objects. For slabs with uneven arching, use the clamps provided by the manufacturer to level them before pouring concrete.

[0017] 2. Moisten before pouring Because the superimposed layer is thin, shrinkage cracks are prone to occur. The slab must be fully moistened before the superimposed layer concrete construction, and the superimposed layer must be covered and watered for maintenance to ensure the overall stress of the slab.

[0018] 3. Vibration during pouring During construction, the concrete of the slab joints should be poured in time, and reliable measures should be taken to vibrate and compact it to prevent concrete defects such as slag inclusion, honeycomb, and dog holes in the slab joints, ensure the transmission of force between the slabs, and avoid unevenness between the slabs, which will affect the decoration construction. In order to ensure the quality of concrete between the hollow slab joints, the concrete of the superimposed layer should be poured after pouring the concrete of the slab joints.

[0019] Step 4: Block the hole The holes at the ends of the SPD board are easy to be filled with concrete slurry during concrete construction, and are prone to water accumulation. Therefore, the holes at both ends should be blocked before hoisting. Usually, polystyrene boards are used, which are not effective. Broken bricks and mortar should be used to block them. Step 5: Open the hole In order to minimize the influence of holes on the stress of the board, holes should be placed in the board's longitudinal direction parallel to the board's span direction, or small holes should be used to minimize the cutting of prestressed tendons. When there are many holes, they should be arranged along the board's span direction and in the shear zone of the board as much as possible.

[0020] Step 6: Cutting corners When arranging panels around frame columns, the problem can be solved by cutting corners at the ends of the panels. Generally, the width of the cut corners should not exceed one-fourth of the panel width. When the width of the cut corners exceeds one-fourth of the panel width, special treatment measures should be taken, such as installing calves or other forms of support on the bottom beam of the panel.

[0021] Step 7: Plate pipeline laying Because various pipelines cannot be laid in prefabricated panels, they need to be laid at the bottom of the panels. The installation of ceiling rods at the bottom of the panels, pipeline installation hangers, and pendants all need to be carried by SPD panels. For pipelines with large loads such as water supply and drainage, fire protection, etc., the hangers must penetrate the SPD panels and be fixed in the laminated layer; ceiling, electric pipes, air ducts and other pipelines with small loads can be fixed with internal expansion bolts to meet the requirements.

[0022] In the past, the overhead layer of the building was made of cast-in-place concrete structure. Since the rooms for cultural relics restoration have high requirements for waterproofing and anti-seepage, in addition to the requirements for construction technology and indicators, it is necessary to ensure that the space for restoring cultural relics is dry and crystallized. The prestressed hollow slab has good durability, can stably withstand the influence of loads and natural environment for a long time, and can effectively resist erosion and damage from various natural forces, such as wind, water, fire, etc., ensuring the use function of the building.

[0023] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A basement prestressed hollow slab drainage construction method based on SPD board, characterized in that It includes the following steps: Step 1: Hoist the SPD board; Step 2: Support; Step 3: pouring the plate seams; Step 4: plug the hole; Step 5: Drill the hole; Step 6: Cut corners; Step 7: Laying of board pipelines.

2. The method for constructing drainage of a prestressed hollow slab in a basement based on an SPD board according to claim 1, characterized in that: In step one, the SPD board is transported to the construction site and must be installed in time. For those that cannot be installed in time, the site must be flat and solid, and full-length pads should be used. The pads should be placed to the left and right of the board end, and the pads should be aligned up and down. The inverted "eight" phenomenon is strictly prohibited, and the stacking height must be controlled. The SPD board lifting point should be located at a distance from the board end, and the angle of the lifting rope should be no less than 60 degrees to prevent the lifting rope from slipping inwards.

3. The method for drainage construction of prestressed hollow slab in basement based on SPD board according to claim 1 is characterized by: In step 2, the construction is carried out by using a hard frame formwork, without the need to set up a steel pipe scaffolding. The beams, the superimposed layers, and the plate joints are poured with concrete at the same time. The reinforcement binding and formwork support of the corbel beam must be well controlled. The support frame adopts double-row support. Within the range of the board end, a connecting rod is set in the height direction to ensure the stability of the frame.

4. The method for constructing drainage of a prestressed hollow slab in a basement based on an SPD board according to claim 1 is characterized in that: In step three:

1. SPD board arching requirements: The thickness of the steel bars and concrete in the laminated layer must be strictly controlled. After the slab is installed, before pouring the slab joints and beam concrete, the slab arch should be adjusted within the range by adding bricks or other heavy objects. For slabs with uneven arching, use a clamp to level them before pouring concrete.

2. Moistening before pouring: Because the superimposed layer is thin, shrinkage cracks are prone to occur. Before the superimposed layer concrete is constructed, the slab must be fully moistened, and the superimposed layer must be covered and watered to ensure the overall stress of the slab.

3. Vibration during pouring: During construction, pour the slab joint concrete in time, and take reliable measures to vibrate and compact it. The overlay layer concrete is poured after pouring the slab joint concrete.

5. The method for constructing drainage of prestressed hollow slab in basement based on SPD board according to claim 1 is characterized by: In step 4, the holes at the ends of the SPD board are easily filled with concrete slurry during concrete construction, and are prone to water accumulation. Before hoisting, the holes at both ends of the board are sealed with broken bricks and mortar.

6. The method for constructing drainage of prestressed hollow slab in basement based on SPD board according to claim 1 is characterized by: In step five, holes need to be left in the board for installing ventilation equipment or power pipelines. The length of the holes should be parallel to the span direction of the board, or small holes should be used to minimize cutting of the prestressed tendons. When there are many holes, they should be arranged along the span direction of the board and in the shear zone of the board.

7. The method for constructing drainage of prestressed hollow slab in basement based on SPD board according to claim 1 is characterized by: In step six, when arranging the panels around the frame columns, cut corners at the ends of the panels. Generally, the width of the cut corners does not exceed one-quarter of the panel width. When the width of the cut corners exceeds one-quarter of the panel width, a calf or other form of support is installed on the bottom beam of the panel.

8. The method for constructing drainage of prestressed hollow slab in basement based on SPD board according to claim 1 is characterized by: In step seven, since various pipelines cannot be laid in the prefabricated panels, they need to be laid at the bottom of the panels. The installation of the ceiling rods at the bottom of the panels, pipeline installation hangers, and pendants need to be supported by the SPD panels; for pipelines with large loads such as water supply and drainage, fire protection, etc., the hangers must penetrate the SPD panels and be fixed in the overlapped layers; ceiling, electric pipes, air ducts and other pipelines with small loads can be fixed with internal expansion bolts to meet the requirements.

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