Double-layer beam structure formwork device and construction method thereof

Abstract

The application provides a double-layer beam structure formwork device and a construction method thereof. The formwork device comprises a main support structure, an upper end U-shaped steel support connected to the top of the main support structure through screwing, a lower end U-shaped steel support connected to the bottom of the main support structure through insertion, the upper end U-shaped steel support being arranged on the longitudinal steel position of the bottom of the upper beam of the double-layer beam structure, the lower end U-shaped steel support being arranged on the longitudinal steel position of the top of the lower beam of the double-layer beam structure, and a reserved screw hole being arranged on the surface of the main support structure. A steel pipe is fixed after passing through the reserved screw hole on the main support structure and the formwork. The arching height of the upper beam body can be accurately controlled by adjusting the length of the main support structure screwed into the upper end U-shaped steel support. The application solves the problem that the middle part of the upper beam steel framework of the double-layer beam structure produces large deflection due to the self weight, thereby causing the formwork to be unable to be supported. The application also solves the problems of difficult formwork of the middle connecting piece of the double-layer beam structure, steel damage and decline of waterproof performance of the lower beam steel due to the welding of the vertical steel.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building engineering, and particularly relates to a double-layer beam structure formwork device and a construction method thereof. BACKGROUND

[0002] With the development of social economy and the improvement of people's living standards, people's requirements for interior design are getting higher and higher, and the proportion of interior mechanical and electrical installation and decoration cost in building investment is gradually increasing. The single-layer beam slab structure cannot meet people's requirements for indoor environment, and the double-layer beam structure is thus produced. The double-layer beam structure is composed of an upper beam, a lower beam and a connecting piece. The upper beam and the lower beam are separated by a certain distance, and the middle is connected by a cast-in-place concrete connecting component. The upper beam, the lower beam and the connecting piece form an integral structure. The space between the upper beam and the lower beam has specific purposes, including pipeline layout, equipment placement, ventilation pipe passage and storage room, etc.

[0003] However, in the actual construction process, although the upper beam is anchored into the two side supports at both ends, the span of part of the double-layer beam structure exceeds 10 m. The upper beam middle steel framework will produce a large deflection due to its own weight, which will lead to difficulties in formwork of the upper beam bottom and make it difficult to control the arch height of the upper beam. On the other hand, the distance between the upper beam and the lower beam is generally small, and the formwork and reinforcement construction is difficult.

[0004] The existing technology generally adopts the scheme of welding a standing steel bar between the upper beam and the lower beam, or using a self-made airplane horse stool bar and a disc buckle combination for formwork and reinforcement. This method connects the standing steel bar or the airplane horse stool bar with the lower beam steel bar by welding, which causes great damage to the lower beam steel bar. Secondly, the standing steel bar or the airplane horse stool bar has low compressive strength and poor processing precision, which cannot guarantee the safety of the upper beam formwork and the arch height. On the other hand, the use of the standing steel bar or the airplane horse stool bar requires long processing time and cannot be reused, which seriously affects the construction progress and wastes materials. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a double-layer beam structure formwork device and a construction method thereof, which solves the problem that the middle part of the upper beam steel framework in the double-layer beam structure produces a large deflection due to its own weight, thereby causing the formwork to be impossible. It also solves the problems of difficult formwork of the connecting piece in the middle of the double-layer beam structure, damage to the steel bar and decline in waterproof performance of the lower beam steel bar due to the welding of the standing steel bar.

[0006] The present application achieves the above technical purpose through the following technical means.

[0007] The application discloses a formwork device for a double-layer beam structure, and belongs to the technical field of formwork devices for double-layer beam structures.

[0008] Further, the upper end U-shaped steel support and the lower end U-shaped steel support are both provided with a ring-shaped water stop steel plate.

[0009] A double-layer beam structure formwork construction method using the formwork device for a double-layer beam structure comprises the following steps.

[0010] S1, a bottom support frame is erected, and a main beam and a secondary beam are laid on the bottom support frame, and then a bottom formwork of a lower beam body is installed;

[0011] S2, a steel framework of the lower beam body is formed, a middle connecting piece steel of the double-layer beam structure is installed, and a steel framework of an upper beam body is formed;

[0012] S3, formworks on both sides of the double-layer beam structure are installed, and a wire is laid and a hole is opened at a specified position of a bottom formwork of the upper beam body, then an upper end U-shaped steel support is erected at a longitudinal steel position of a bottom of the upper beam body, a ring-shaped water stop steel plate is installed, and a threaded rod part of the upper end U-shaped steel support is ensured to pass through the opened hole;

[0013] S4, a lower end U-shaped steel support is erected at a longitudinal steel position of a top of the lower beam body, and a ring-shaped water stop steel plate is installed;

[0014] S5, a bottom end of a main body support structure is inserted into the lower end U-shaped steel support, and a top end is screwed into the upper end U-shaped steel support;

[0015] S6, the length of the main body support structure screwed into the upper end U-shaped steel support is adjusted, the scale on the threaded rod of the upper end U-shaped steel support is observed, and the arching height of the upper beam body is controlled;

[0016] S7, a steel pipe is passed through the reserved threaded rod perforation on the main body support structure and the formworks on both sides, and then is fixed by using a threaded rod and a gable-shaped clamp, and at other positions, the steel pipe is directly passed through the formworks on both sides and then is fixed by using a threaded rod and a gable-shaped clamp;

[0017] S8, pouring concrete and curing, after the concrete reaches the design strength, the two side forms are removed in turn;

[0018] S9, cutting off the upper end U-shaped steel support, the lower end U-shaped steel support, recycling the main support structure, and brushing anti-rust paint at the cutting place;

[0019] S10, the bottom support frame body and the formwork at the bottom of the double-layer beam structure are removed in turn.

[0020] The present application has the following beneficial effects:

[0021] The present application effectively solves the problem that the middle part of the upper beam reinforcement framework in the double-layer beam structure produces large deflection due to self-weight, thereby causing the problem that formwork cannot be supported, and also solves the problems of difficult formwork support of the intermediate connecting piece in the double-layer beam structure and reinforcement damage and decline of waterproof performance of the lower beam reinforcement due to the welding of the vertical reinforcement. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a formwork supporting device for the double-layer beam structure of the present application;

[0023] Figure 2 It is a three-dimensional structure schematic diagram of the formwork supporting unit of the present application;

[0024] Figure 3 It is a front formwork supporting schematic diagram of the formwork supporting unit of the present application;

[0025] Figure 4 It is a side formwork supporting schematic diagram of the formwork supporting unit of the present application;

[0026] In the figure: 1-support frame body; 2-main beam; 3-secondary beam; 4-lower beam body; 5-intermediate connecting piece; 6-upper beam body; 7-formwork supporting unit; 71-upper end U-shaped steel support; 72-ring-shaped water stop steel plate; 73-reserved screw rod through hole; 74-upper beam bottom longitudinal reinforcement; 75-main support structure; 76-lower end U-shaped steel support; 77-lower beam top longitudinal reinforcement; 8-formwork; 9-steel pipe; 10-screw rod. DETAILED DESCRIPTION

[0027] The present application will be further described below in combination with the drawings and specific embodiments, but the protection scope of the present application is not limited thereto.

[0028] As Figure 1As shown, the double-layer beam structure comprises a lower beam body 4, a middle connecting piece 5, and an upper beam body 6. The double-layer beam structure formwork device comprises a support frame body 1, a main beam 2, a secondary beam 3, a formwork unit 7, a formwork 8, a steel pipe 9, a screw rod 10, and a gable-shaped clamp 11. The side formwork 8 of the double-layer beam structure is fixed by the steel pipe 9, the screw rod 10, and the gable-shaped clamp 11, the bottom of the formwork 8 is supported and fixed by the bottom support frame body 1, the main beam 2, and the secondary beam 3, and the formwork unit 7 is arranged between the steel reinforcement framework of the upper beam body 6 and the lower beam body 4.

[0029] The formwork unit 7 comprises a formwork unit 7 for controlling the deflection and arch height of the upper beam body 6, the formwork unit 7 comprises an upper end U-shaped steel reinforcement support 71, a ring-shaped water stop steel plate 72, a screw rod through hole 73, a main body support structure 75, and a lower end U-shaped steel reinforcement support 76.

[0030] As shown in Figure 2 , 3 , the main body support structure 75 is provided with a plurality of screw rod through holes 73 matched with the steel pipe 9 along the height direction, a threaded hole matched with the upper end U-shaped steel reinforcement support 71 is formed at the top of the main body support structure 75, and a plug hole matched with the lower end U-shaped steel reinforcement support 76 is formed at the bottom of the main body support structure 75. The top of the upper end U-shaped steel reinforcement support 71 is designed as a U-shaped structure, the lower part is a columnar structure and is provided with external threads on the surface, the structure of the lower end U-shaped steel reinforcement support 76 is similar to that of the upper end U-shaped steel reinforcement support 71, and the difference between them is that the lower part of the lower end U-shaped steel reinforcement support 76 is a smooth rod structure. The upper end U-shaped steel reinforcement support 71 is threadedly connected with the main body support structure 75, and the lower end U-shaped steel reinforcement support 76 is plug-connected with the main body support structure 75. The upper end U-shaped steel reinforcement support 71 and the lower end U-shaped steel reinforcement support 76 are each provided with a ring-shaped water stop steel plate 72.

[0031] The construction method of the double-layer beam structure formwork device comprises the following processes:

[0032] S1, erect the bottom support frame body 1, lay the main beam 2 and the secondary beam 3 on the bottom support frame body 1, and then install the bottom formwork 8 of the lower beam body 4;

[0033] S2, make the steel reinforcement framework of the lower beam body 4, install the steel reinforcement of the middle connecting piece 5 of the double-layer beam structure, and make the steel reinforcement framework of the upper beam body 6. The steel reinforcement frameworks of the upper beam body and the lower beam body are extended into the two side supports according to the design requirements;

[0034] S3, install the formwork 8 on both sides of the double-layer beam structure, drill holes at the appropriate positions of the formwork 8 at the bottom of the upper beam body 6, then stand the upper end U-shaped steel reinforcement support 71 of the formwork unit 7 at the position of the longitudinal steel reinforcement 74 at the bottom of the upper beam, install the ring-shaped water stop steel plate 72, and ensure that the threaded rod part of the upper end U-shaped steel reinforcement support 71 can pass through the hole;

[0035] S4. Erect the lower U-shaped steel bar support 76 of the formwork unit 7 at the position of the longitudinal steel bar 77 at the top of the lower beam, and install the ring-shaped waterstop steel plate 72.

[0036] S5. Install the main support structure 75 of the formwork unit 7, insert the bottom end of the main support structure 75 into the lower U-shaped steel bar bracket 76, and screw the top end of the main support structure 75 into the upper U-shaped steel bar bracket 71.

[0037] S6. By adjusting the length of the upper U-shaped steel bar bracket 71 screwed into the top of the main support structure 75, observe the scale on the threaded rod of the upper U-shaped steel bar bracket 71 to accurately control the arching height of the upper beam 6.

[0038] S7. Install steel pipes 9 on both sides of the double-layer beam structure; at the position of the formwork unit 7, after passing the steel pipe 9 through the reserved screw hole 73 on the main support structure 75 and the templates 8 on both sides, fix it with screw 10 and mountain-shaped clip 11. At other positions, the steel pipe 9 directly passes through the templates 8 on both sides and is fixed by screw 10 and mountain-shaped clip 11.

[0039] S8. Pour concrete and cure it. After the concrete reaches the design strength, remove the formwork on both sides in sequence.

[0040] S9. Cut off the upper U-shaped steel bar support 71 and the lower U-shaped steel bar support 76, recycle the main support structure 75, then cut off the excess screws 10, and apply anti-rust paint to the cut area.

[0041] S10. Sequentially remove the bottom support frame 1 and the formwork 8 at the bottom of the double-layer beam structure.

[0042] The method of using the bottom support frame 1, main rib 2, and secondary rib 3 for support and fixation is a commonly used support method in building construction. Therefore, its structure and support principle will not be described in detail in this embodiment. The above embodiment is a preferred embodiment of the present invention, but the present invention is not limited to the above embodiment. Any obvious improvements, substitutions, or modifications that can be made by those skilled in the art without departing from the essence of the present invention are within the protection scope of the present invention.

Claims

1. A construction method for double-layer beam structure formwork using a double-layer beam structure formwork support device, characterized in that, The sides of the template (8) of the double-layer beam structure are fixed by steel pipes (9), bolts (10) and mountain-shaped clips (11). The bottom of the template (8) is supported and fixed by the support frame (1), main rib (2) and secondary rib (3). A formwork unit (7) is set between the steel reinforcement skeleton of the upper beam (6) and the lower beam (4) of the double-layer beam structure. The formwork unit (7) includes the main support structure (75), the upper U-shaped steel reinforcement bracket (71) and the lower U-shaped steel reinforcement bracket (76). The surface of the main support structure (75) is along the height direction. The main support structure (75) has threaded holes at the top and insertion holes at the bottom, with multiple threaded holes (73) for steel pipes (9) to pass through. The upper U-shaped steel bar bracket (71) has a U-shaped structure at the top and a columnar structure at the bottom with external threads on the surface. The lower U-shaped steel bar bracket (76) has a U-shaped structure at the top and a smooth rod-like structure at the bottom. The upper U-shaped steel bar bracket (71) is threaded to the main support structure (75), and the lower U-shaped steel bar bracket (76) is inserted into the main support structure (75). The construction method for formwork support of a double-layer beam structure includes the following steps: S1. Erect the bottom support frame (1), and lay the main beam (2) and secondary beam (3) on it, and then install the bottom formwork (8) of the lower beam (4); S2. Construct the steel reinforcement cage of the lower beam (4), install the intermediate connecting parts (5) of the double-layer beam structure, and construct the steel reinforcement cage of the upper beam (6). S3. Install the formwork (8) on both sides of the double-layer beam structure, and mark the hole at the designated position of the formwork (8) at the bottom of the upper beam (6). Then, erect the upper U-shaped steel bar bracket (71) at the position of the longitudinal steel bar (74) at the bottom of the upper beam, and install the ring-shaped waterstop steel plate (72), and ensure that the threaded rod part of the upper U-shaped steel bar bracket (71) passes through the hole. S4. Erect the lower U-shaped steel bar support (76) at the position of the longitudinal steel bar (77) at the top of the lower beam, and install the ring-shaped waterstop steel plate (72); S5. Insert the bottom end of the main support structure (75) into the lower U-shaped steel bar bracket (76), and screw the top end into the upper U-shaped steel bar bracket (71); S6. By adjusting the length of the upper U-shaped steel bar bracket (71) screwed into the top of the main support structure (75), observe the scale on the threaded rod of the upper U-shaped steel bar bracket (71) to control the arching height of the upper beam (6); S7. At the position of the formwork unit (7), the steel pipe (9) is passed through the reserved screw hole (73) on the main support structure (75) and the templates on both sides (8), and then fixed with screws (10) and mountain-shaped clips (11). At other positions, the steel pipe (9) is directly passed through the templates on both sides (8) and then fixed with screws (10) and mountain-shaped clips (11). S8. Pour concrete and cure it. After the concrete reaches the design strength, remove the formwork on both sides in sequence (8). S9. Cut off the upper U-shaped steel bar support (71) and the lower U-shaped steel bar support (76), recover the main support structure (75), and apply anti-rust paint to the cut area. S10. Sequentially remove the bottom support frame (1) and the formwork (8) at the bottom of the double-beam structure.

2. The method for constructing a double-layer beam structure using formwork according to claim 1, characterized in that, Both the upper U-shaped steel bar bracket (71) and the lower U-shaped steel bar bracket (76) are equipped with ring-shaped water-stop steel plates (72).

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