WO2021073513A1

WO2021073513A1 - Construction method combining cast-in-place cylinder structure with fabricated frame structure

Info

Publication number: WO2021073513A1
Application number: PCT/CN2020/120723
Authority: WO
Inventors: 熊靖; 彭宝安
Original assignee: 荆门市佰思机械科技有限公司
Priority date: 2019-10-14
Filing date: 2020-10-14
Publication date: 2021-04-22
Also published as: CN110629886A; CN110629886B

Abstract

Disclosed in the present invention is a construction method combining a cast-in-place cylinder structure with a fabricated frame structure, mainly applied in the field of construction engineering for high-rise building construction, and high in construction speed, and also ensuring the overall stiffness of a building. The construction method comprises: 1. first constructing a cast-in-place cylinder part to the third-floor topping elevation by utilizing a slip-form construction technology; 2. carrying out hoisting and assembling operation on first-floor and second-floor fabricated frame structures; 3. enabling a vertical reinforcement cage to penetrate through a plurality of U-shaped rebars of first-floor and second-floor frame girders A, and placing the bottom of the vertical reinforcement cage to a foundation top surface of the cylinder; 4. pouring concrete in a cavity of a vertical through hole to enable the cast-in-place concrete to fill the vertical through hole and cavities of a plurality of horizontal holes, and after the concrete reaches certain strength, carrying out slip-form construction on third-floor and fourth-layer cylinders. The construction method for other floors can be carried out in the same manner; the plurality of U-shaped rebars are pre-embedded in joint ends of the frame girders A and the cylinders, and the plurality of U-shaped rebars are in one-to-one correspondence to the plurality of horizontal holes in position.

Description

Construction method for combining cast-in-place tube structure and fabricated frame structure

Technical field

The invention is mainly used in the construction of middle and high-rise residential structures in the field of construction engineering.

Background technique

In order to speed up the construction progress without reducing the overall rigidity of the building, a high-rise residential building of our company is planned to be a structural system combining cast-in-situ tubular structure and fabricated frame structure, and the elevator and staircase are designed as cast-in-situ tubular structures. The structure is to improve the overall rigidity of the building and resist earthquake and wind loads. In order to speed up the construction progress, the living room, bedroom, kitchen and bathroom and other rooms are designed as prefabricated frame structures. In this way, there are two types of complete cast-in-place and assembly. Different construction techniques, how to coordinate the two to ensure that the construction progress is accelerated? How to connect the fabricated frame structure and the cast-in-situ cylinder structure? This will be the problem we face.

technical problem

How to connect the fabricated frame structure and the cast-in-situ cylinder structure.

Technical solutions

The present invention solves the above problems. The main construction method is: the cast-in-situ cylinder structure adopts the slip form construction technology to construct first, and the beam, column and plate construction of the assembled frame structure are interspersed during the construction of the cast-in-situ cylinder structure, and the assembly is assembled. The beams, columns and slabs of the frame structure are hoisted and assembled on site. The specific construction methods are as follows:

Step 1. After the construction of the building foundation is completed, first use the slipform construction technology to construct the cast-in-situ tube part of the elevator car and stairwell to the three-story floor elevation (18), and at the same time at the tube bolster (12). ) Reserve vertical through holes (10) and multiple horizontal holes (11); step two, in the construction process of step one, carry out the frame columns (8), frame beams, Frame beam B (9), frame beam A (7), hoisting and assembling work of floor slab, frame column (8), frame beam, frame beam B (9) and floor slab are assembled according to the existing technology. For the frame beam A (7) on the second floor, insert multiple U-shaped steel bars (14) of the frame beam A (7) into the corresponding horizontal holes (11) at the tube bolster (12). At the same time, multiple U The shaped steel bar (14) enters the cavity of the vertical through hole (10). At this time, the end of the frame beam A (7) and the cylinder body needs to be temporarily supported; step three, the vertical steel bar dragon (13) is passed through The multiple U-shaped steel bars (14) of the frame beam A(7) passing through the first and second floors are placed on the top surface of the foundation of the cylinder. At this time, the vertical steel bar dragon (13) is in the vertical through hole ( In the cavity of 10); step four, inject concrete into the cavity of the vertical through hole (10) and perform grouting construction, so that the cast-in-place concrete is filled with the vertical through hole (10) and multiple horizontal holes (11) In the cavity, after the concrete reaches a certain strength, the three- and four-story cylindrical slipform construction is carried out, and the assembly-type component construction of the three to four floors is interspersed at the same time; the construction methods of other floors can be deduced by analogy. When constructing other floors, the upper vertical reinforcement dragon (13) needs to be welded and fixed with multiple vertical reinforcements (15) of the lower vertical reinforcement dragon (13); the end of the frame beam A (7) combined with the cylinder is embedded There are multiple U-shaped steel bars (14). The positions of multiple U-shaped steel bars (14) correspond to the positions of multiple horizontal holes (11). The main reinforcement is fixed; the vertical reinforcement dragon (13) is composed of multiple evenly arranged vertical reinforcements (15) and multiple horizontal stirrups (16), and multiple horizontal stirrups (16) surround multiple evenly arranged vertical The steel bar (15) is fixed with it, the vertical steel bar dragon (13) is used as the stress steel bar for connecting the multiple U-shaped steel bars (14) of the frame beam A (7), and the vertical steel bar dragon (13) also serves as the supporting frame The main reinforcement of beam A (7).

Beneficial effect

The invention can greatly improve the construction progress of middle and high-rise residential structures, and the connection between the assembled frame structure and the cast-in-situ cylindrical structure is firm and reliable.

Description of the drawings

1-Elevator shaft A, 2-Elevator shaft B, 3-Staircase, 4-Elevator front room, 5-Frame beam and cylinder junction A, 6-Frame beam and cylinder junction B, 7-Frame beam A , 8-frame column, 9-frame beam B, 10-vertical through hole, 11-horizontal hole, 12-tube bolster, 13-vertical steel bar, 14-U-shaped steel bar, 15-vertical steel bar , 16-horizontal stirrups, 17-two-story floor elevation, 18-three-story floor elevation.

Figure 1 is a schematic diagram of the combination of a cast-in-situ cylinder structure and a fabricated frame structure.

FIG. 2 is a schematic diagram of the vertical through holes 10 and horizontal holes 11 reserved at the bolster 12 of the cylindrical body.

FIG. 3 is a schematic diagram of the embedded U-shaped steel bar 14 of the frame beam A7 before being inserted into the horizontal hole 11.

4 is a schematic diagram of the vertical reinforcement dragon 13 inserted into the pre-embedded U-shaped reinforcement 14 of the frame beam A7.

Figure 5 is a large-scale drawing of the vertical steel bar dragon 13.

FIG. 6 is a schematic diagram of a plurality of horizontal holes 11 reserved at the cylinder bolster 12.

FIG. 7 is an elevation view of the U-shaped steel bars 14 embedded in the frame beam A7.

FIG. 8 is a plan view of the U-shaped steel bars 14 embedded in the frame beam A7.

The best mode of the present invention

Referring to Figure 1, the connection between the frame beam and the tube structure is divided into two situations. One is the case where the frame beam and the tube body are joined at B6. The frame beam B9 and the tube wall of the tube form a T shape. In this case , As long as a hole is reserved in the cylinder wall, the exposed main rib of frame beam B9 passes through the reserved hole of the cylinder wall, and then the exposed main rib of frame beam B9 is fixed to the cylinder wall of the cylinder with a nut. The other is the case of A5 at the junction of the frame beam and the tube body. There are 6 points in total. See Figure 3. The extension line of the right end of the frame beam A7 coincides with the tube wall. If you use the conventional reinforcement anchoring method to construct It is difficult to weld and fix the main steel bars reserved at the right end of the frame beam A7 with the steel bars of the cylinder, because the cylinder is first constructed with sliding film, and it is unrealistic to expose the steel bars of the frame butt with the frame beam A7; the frame in Figure 1 The black-filled parts are the elevator shaft A1, the elevator shaft B2, the elevator front room 4, and the stairwell 3. These rooms are the cast-in-place cylinder parts; see Figure 4, after the vertical through hole 10 is grouted and the concrete reaches the strength, the vertical Reinforced dragon 13, multiple U-shaped steel bars 14 at the right end of the frame beam A7 and the recharged concrete work together to resist the end moment load transmitted by the frame beam A7, while the vertical reinforcement dragon 13 and the recharged concrete jointly resist the frame beam Vertical compressive stress is transmitted from A7. Reinforcing steel bars need to be designed around the vertical through holes 10 of the tube beam 12 according to the structural requirements; the other parts of the tube body are distributed according to the conventional design; if the frame beam is combined with the tube body At A5, the frame beam A7 and the cylinder body are connected by conventional steel members, then the outer wall of the cylinder body at the junction of the frame beam and the cylinder body A5 needs to be embedded with steel plates, and the steel plates need to be welded and connected, and the right end of the frame beam A7 also needs to be embedded Connect the steel plates, and finally fix the connecting steel plates of the frame beam A7 with the connecting steel plates of the cylinder with bolts and nuts. This design scheme will consume a lot of steel and the exposed steel components will affect the appearance.

Embodiments of the present invention

BEST MODE The embodiments of the present invention have been described in detail, and will not be described in detail here.

Industrial applicability

The invention can be widely used in the connection of cast-in-place structures and fabricated structures in the field of construction engineering.

Claims

The construction method combining the cast-in-place tubular structure and the fabricated structure is characterized by: the cast-in-situ tubular structure adopts the slip form construction technology to construct first, and the beams and columns of the assembled frame structure are interspersed during the construction of the cast-in-situ tubular structure. , Slab construction, the beams, columns, and slabs of the prefabricated frame structure are hoisted and assembled on site. The specific construction methods are as follows: Step 1. After the construction of the building foundation is completed, first use the slipform construction process to construct the elevator and stairwells The part of the cast-in-place cylinder reaches the elevation (18) of the three-story floor, and at the same time, vertical through holes (10) and multiple horizontal holes (11) are reserved at the bolster (12) of the cylinder; step two, in step one In the construction process of the first and second floors, the frame column (8), frame beam, frame beam B (9), frame beam A (7), and floor slabs of the frame column (8), frame beam, frame beam B (9), and floor slab are hoisted and assembled, and the frame column (8) ), frame beams, frame beams B (9) and floor slabs are assembled according to the prior art. When assembling the frame beam A (7) of the first and second floors, the multiple U-shaped steel bars ( 14) Respectively insert into the corresponding horizontal holes (11) at the cylindrical bolster (12), and at the same time, multiple U-shaped steel bars (14) enter the cavity of the vertical through holes (10), and frame beam A (7) ) The end of the connection with the cylinder needs to be temporarily supported; Step 3: Pass the vertical steel bar dragon (13) through the multiple U-shaped steel bars (14) of the frame beam A (7) on the first and second floors, and the bottom Place it on the top surface of the foundation of the cylinder, at this time the vertical reinforcement dragon (13) is in the cavity of the vertical through hole (10); step four, inject concrete into the cavity of the vertical through hole (10) and Carry out grouting construction so that the cast-in-place concrete fills the cavities of the vertical through holes (10) and multiple horizontal holes (11). After the concrete reaches a certain strength, the three- and four-layer sliding formwork construction is carried out. At the same time, the construction of fabricated components from three to four floors is interspersed; the construction methods of other floors can be deduced by analogy. When constructing other floors, the upper vertical reinforcement dragon (13) needs to be more than the lower vertical reinforcement dragon (13). A number of vertical steel bars (15) are welded and fixed; the end of the frame beam A (7) and the tube body is pre-embedded with multiple U-shaped steel bars (14), the position of the multiple U-shaped steel bars (14) and multiple horizontal holes The positions of (11) correspond to each other. The U-shaped steel bars (14) are fixed with the main force-bearing steel bars in the frame beam A (7); the vertical steel bar dragon (13) consists of multiple evenly arranged vertical steel bars (15) and multiple It is composed of horizontal stirrups (16). Multiple horizontal stirrups (16) surround and fix multiple evenly arranged vertical steel bars (15). The vertical steel bar dragon (13) serves as the connecting frame beam A (7). A plurality of U-shaped steel bars (14) are the force-bearing steel bars, and the vertical steel bar dragon (13) also serves as the main force-bearing bar of the supporting frame beam A (7).