Construction method of concrete structure formwork supporting system

Abstract

The invention relates to the technical field of formwork reinforcement, in particular to a concrete structure formwork supporting system construction method which comprises the following steps that inner core rods are bound at the positions, corresponding to opposite-pulling screw holes in pouring formworks on the two sides, of structural steel bars, the inner core rods are sleeved with water stopping layers, and threaded grooves are formed in the two ends of each inner core rod; the two ends of the inner core rod are sleeved with corrugated pipes, and the inner core rod is sleeved with the corrugated pipes. A pouring formwork is arranged, a transverse support is arranged on the outer side of the pouring formwork, the outer end of the corrugated pipe abuts against the inner side wall of the pouring formwork, and one end of an outer pulling screw penetrates through a through hole in the transverse support and a split bolt hole in the pouring formwork and is in threaded connection with a threaded groove in the end of the inner core rod through the corrugated pipe; a forward nut and a reverse nut are sequentially mounted at the other end of the external pulling screw rod; the problems of later-stage water seepage of a concrete structure, inconvenience in dismantling caused by deformation of a pull rod hole, formwork expansion or formwork slurry leakage caused by looseness of a pull rod nut and the like are thoroughly solved, and therefore the construction quality of the concrete structure is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of formwork reinforcement, and specifically to a construction method for a formwork support system for concrete structures. Background Art

[0002] When pouring concrete for a beam or wall, it is very easy to have the phenomena of form bulging and the beam or wall being oversized. It is very difficult to ensure that the cross-section of the finally poured wall has the designed size. Therefore, during the formwork erection process, tie rods are usually used to ensure the cross-section size of the finally poured wall; traditional tie rods are made of steel and are made of a single full-length steel bar with screw threads and nuts provided at both ends; during the construction process, after the steel bars and formwork are installed, an outer sleeve is sleeved on the tie rod, and the full-length tie rod is passed through the tie rod hole of the formwork, and then the cross bar and nut are installed at both ends of the tie rod and outside the formwork according to the formwork thickness to perform the formwork fixing operation.

[0003] During the construction process, it is found that the tie rods in the prior art have the following problems: 1. During the concrete vibration process, the nuts are prone to looseness or even fall off, and special personnel must be arranged to check at any time, and form bulging is likely to occur; 2. After the tie rod is pulled out, the plugging effect of the tie rod hole is often not good, resulting in water seepage and leakage in the later stage, seriously affecting the use effect of the structure; 3. During the concrete pouring process, the concrete will squeeze the tie rod hole, which may cause the tie rod hole to deform, resulting in the tie rod being unable to be pulled out in the later stage, and only a cutting machine can be used to cut off the tie rod, causing a large amount of waste of the tie rod and unable to be recycled. Secondly, the cut-off tie rod is exposed outside and is corroded for a long time, which is very likely to cause the corrosion of the steel bars in the structure, seriously affecting the use safety and service life of the structure. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a construction method for a formwork support system for concrete structures that can directly eliminate the quality hidden danger of water seepage in the later stage of the tie rod hole of the concrete structure, and avoid problems such as the tie rod being left in the structure due to concrete extrusion, the tie rod being unable to be taken out, and the tie rod being non-recyclable.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A construction method for a formwork support system for concrete structures includes the following steps:

[0007] S1: According to the position of the tie bolts holes on the concrete structure and the formwork for pouring, the layout of the structural steel bars is deeply designed;

[0008] S2: Bind the structural steel bars according to the deep design drawings;

[0009] S3: On the structural steel bars, inner core rods are tied at positions corresponding to the through holes of the tie bolts on the formworks for pouring on both sides. A water stop layer is sleeved outside the inner core rods. The water stop layer is located at the midpoint of the inner core rods. Threaded grooves are provided at both ends of the inner core rods.

[0010] S4: Bellows are sleeved at both ends of the inner core rods. The bellows are sleeved outside the inner core rods.

[0011] S5: Pouring formworks are arranged, and cross braces are arranged on the outer sides of the pouring formworks. One end of the bellows away from the inner core rod abuts against the inner side wall of the pouring formwork. One end of the external tension screw penetrates through the through hole on the cross brace and the tie bolt hole on the pouring formwork, and is threadedly connected to the threaded groove at the end of the inner core rod through the bellows.

[0012] S6: Two nuts are sequentially installed at the other end of the external tension screw. The nut close to the pouring formwork is a forward nut, and the nut away from the pouring formwork is a reverse nut.

[0013] S7: After all the external tension screws are installed, the formwork support system is connected and fixed to the structural steel bar system, and then concrete can be poured.

[0014] S8: After the concrete reaches the formwork removal strength, the two nuts, the external tension screw and the pouring formwork are removed, and the external tension screw groove on the concrete structure is sealed with waterproof mortar.

[0015] As a preference, a further technical solution of the present invention is:

[0016] Preferably, in step S3, the formworks for pouring on both sides are symmetrical about the inner core rod.

[0017] Preferably, the length of the bellows sleeved on the inner core rod is greater than or equal to 5 cm.

[0018] Preferably, the distance from the end of the inner core rod to the inner side wall of the pouring formwork is less than or equal to 5 cm.

[0019] Preferably, in step S3, the water stop layer adopts a rubber water stop ring or a rubber water stop belt.

[0020] Preferably, in step S6, a gasket is installed between the forward nut and the cross brace.

[0021] Preferably, a T-shaped connecting sleeve is further arranged between the forward nut and the gasket. The T-shaped connecting sleeve includes a pressing plate. A connecting hole adapted to the external tension screw is arranged on the pressing plate, and an outer sleeve body is connected to the connecting hole. When in use, the outer sleeve body is sleeved on the external tension screw, the pressing plate is tightly pressed on the gasket, and then the forward nut and the reverse nut are screwed in sequentially.

[0022] The present invention adopting the above technical solution, compared with the prior art, has the prominent characteristics:

[0023] In the present invention, the traditional tie rod is decomposed into an inner core rod and an outer tie rod. Since the inner core rod is left in the concrete structure, through holes of the tie rod will not be formed, so that the concrete structure has good waterproof effect. By setting thread grooves and corrugated pipes, deformation of the tie rod holes is avoided, making the outer tie rod easy to disassemble. By setting a forward nut and a reverse nut, the problem of formwork bulging caused by nut loosening is avoided; through the present invention, after the traditional tie rod is used in a concrete structure, problems such as water seepage caused by poor plugging effect of the tie rod holes, inconvenience in demolition caused by deformation of the tie rod holes, formwork bulging or formwork leakage caused by loosening of the tie rod nuts are completely eliminated, thereby greatly improving the construction quality of the concrete structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic structural view of a formwork support system for a concrete structure in an embodiment of the present invention;

[0025] Figure 2 FIG. is a schematic side view of a formwork support system for a concrete structure in an embodiment of the present invention;

[0026] Figure 3 FIG. is a schematic connection structure view of an inner core rod and an outer tie rod in an embodiment of the present invention.

[0027] Description of reference numerals: 1, casting formwork; 101, backing rib; 2, inner core rod; 3, waterstop layer; 4, corrugated pipe; 5, outer tie rod; 6, cross brace; 7, gasket; 8, T-shaped connecting sleeve; 801, pressing plate; 802, outer sleeve; 9, forward nut; 10, reverse nut. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention will be further described below in conjunction with specific embodiments, and the purpose is only to better understand the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0029] As Figures 1 to 3 shown, this embodiment provides a construction method for a formwork support system for a concrete structure, including the following steps:

[0030] S1: According to the position of the tie rod holes on the concrete structure and the casting formwork 1, the layout of the structural steel bars is deeply designed.

[0031] S2: Bind the structural steel bars according to the deep design drawings.

[0032] S3: On the structural steel bars, the inner core rods 2 are tied at the positions corresponding to the through holes for the tie bolts on the two-side formworks 1 for casting. A water stop layer 3 is sleeved outside the inner core rods 2. The water stop layer 3 is located at the midpoint of the inner core rods 2. In this embodiment, the water stop layer 3 is a rubber water stop ring or a rubber water stop belt. Thread grooves are provided at both ends of the inner core rods 2. When setting the inner core rods 2, the two-side formworks 1 should be symmetric about the inner core rods 2. To ensure the water stop effect and reduce the subsequent workload of plastering the waterproof mortar, when setting the inner core rods 2, the distance between the end of the inner core rod 2 and the inner side wall of the formwork 1 for casting should be less than or equal to 5 cm.

[0033] S4: Bellows 4 are sleeved at both ends of the inner core rods 2. The bellows 4 are sleeved outside the inner core rods 2.

[0034] Furthermore, to ensure that the bellows 4 are stably sleeved on the inner core rods 2, the length of the bellows 4 sleeved on the inner core rods 2 should be greater than or equal to 5 cm. The gap between the inner wall of the bellows 4 and the outer wall of the inner core rods 2 can be filled with waterproof mortar.

[0035] S5: Set the formwork 1 for casting. A back brace 101 is provided on the outer side wall of the formwork 1 for casting. The formwork 1 for casting can be composed of several unit formworks spliced together. A cross brace 6 is provided outside the back brace 101 of the formwork 1 for casting. One end of the bellows 4 away from the inner core rod 2 abuts against the inner side wall of the formwork 1 for casting; a through hole with the same diameter as the outer tie rod 5 is provided in the middle of the cross brace 6. One end of the outer tie rod 5 passes through the through hole on the cross brace 6 and the tie bolt hole on the formwork 1 for casting, and is threadedly connected to the thread groove at the end of the inner core rod 2 through the bellows 4. Among them, the cross brace 6 is made of a steel snap type, with a bow shape, a width of 3 - 5 cm and a thickness.

[0036] S6: Install a gasket 7, a T-shaped connecting sleeve 8 and two nuts in sequence at the other end of the outer tie rod 5. Among them, the nut close to the formwork 1 for casting is a positive nut 9, and the nut away from the formwork 1 for casting is a reverse nut 10. The T-shaped connecting sleeve 8 includes a pressing plate 801. A connecting hole adapted to the outer tie rod 5 is provided on the pressing plate 801. An outer sleeve 802 is connected to the connecting hole; during use, the outer sleeve 802 is sleeved on the outer tie rod 5, the pressing plate 801 is tightly pressed on the gasket 7, and then the positive nut 9 and the reverse nut 10 are screwed in sequence.

[0037] S7: After all the outer tie rods 5 are installed, the formwork support system is connected and fixed to the structural steel bar system, and then the concrete can be cast.

[0038] S8: After the concrete reaches the formwork removal strength, remove the two nuts, the outer tie rod 5 and the formwork 1 for casting, and seal the groove of the outer tie rod 5 on the concrete structure with waterproof mortar.

[0039] Without changing the pull bolts in the support system of the original casting formwork 1, the installation is carried out at the original position of the tie rod, avoiding the instability and slurry leakage of the formwork support system; the tie rod is divided into two major parts: the inner core rod 2 and the outer pull screw 5, and the inner core rod 2 and the outer pull screw 5 are connected by threads, which is convenient for the disassembly and installation of the outer pull screw 5; the inner core rod 2 is made of steel material with a water stop layer 3, which can completely and effectively achieve the effects of water stop and anti-seepage; the end of the outer pull screw 5 uses forward and reverse double nuts, completely avoiding the loosening or falling off of the nuts at the tie rod end caused by vibration during the concrete pouring of the structure, and the phenomena such as formwork explosion, formwork swelling, and slurry leakage of the formwork support system; by setting the T-shaped connecting sleeve 8, the pressing plate 801 of the T-shaped connecting sleeve 8 increases the contact area between the screw and the cross brace 6 and the casting formwork 1, ensuring the stability of the connection; by setting the cross brace 6, it is convenient for multiple unit formworks to form an integral body; through this method, components such as the casting formwork 1, structural steel bars, inner core rod 2, outer pull screw 5, and cross brace 6 can form an integral body. Compared with the traditional process, it makes the formwork support system more stable and safe.

[0040] The above are only the preferred embodiments of the present invention that can be implemented, and do not limit the scope of the rights of the present invention accordingly. Any equivalent changes made by using the content of the specification and drawings of the present invention are included in the scope of the rights of the present invention.

Claims

1. A method for constructing a concrete structure formwork support system, characterized in that: The steps include: S1: Based on the positions of the tension bolt holes on the concrete structure and the casting formwork (1), the structural reinforcement arrangement is further designed; S2: Tie structural reinforcement according to detailed design drawings; S3: On the structural steel bar, an inner core rod (2) is tied at the positions of the tension screw holes on the casting templates (1) on both sides, and a water stop layer (3) is connected to the outer shell of the inner core rod (2). The water stop layer (3) is located at one-half of the inner core rod (2), and thread grooves are arranged at both ends of the inner core rod (2); S4: The two ends of the inner core rod (2) are sleeved with a bellows (4), and the bellows (4) is sleeved outside the inner core rod (2); S5: a casting template (1) is provided, and a cross brace (6) is provided on the outside of the casting template (1), and one end of the corrugated tube (4) away from the inner core rod (2) is abutted against the inner wall of the casting template (1); one end of the external tension screw rod (5) passes through the through hole on the cross brace (6) and the tension bolt hole on the casting template (1), and is threadedly connected to the thread groove at the end of the inner core rod (2) through the corrugated tube (4); S6: Two nuts are installed in sequence from the other end of the external pull screw (5), wherein the nut on the side close to the casting template (1) is the forward nut (9), and the nut on the side away from the casting template (1) is the reverse nut (10); S7: After all the external tie screws (5) are installed, the formwork support system is connected and fixed to the structural reinforcement system, and concrete can be poured; S8: After the concrete reaches the demoulding strength, remove the two nuts, the external pull screw (5) and the casting formwork (1), and use waterproof mortar to seal the groove of the external pull screw (5) on the concrete structure.

2. A method for constructing a concrete structure formwork support system according to claim 1, characterized in that: In step S3, the casting templates (1) on both sides are symmetrical about the inner core rod (2).

3. A method for constructing a concrete structure formwork support system according to claim 1, characterized in that: The length of the corrugated tube (4) sleeved on the inner core rod (2) is greater than or equal to 5 cm.

4. A method for constructing a concrete structure formwork support system according to claim 1, characterized in that: The distance between the end of the inner core rod (2) and the inner wall of the casting template (1) is less than or equal to 5 cm.

5. A method for constructing a concrete structure formwork support system according to claim 1, characterized in that: In step S3, the water stop layer (3) is a rubber water stop ring or a rubber water stop strip.

6. A method for constructing a concrete structure formwork support system according to claim 1, characterized in that: In step S6, a gasket (7) is installed between the forward nut (9) and the cross brace (6).

7. A method for constructing a concrete structure formwork support system according to claim 6, characterized in that: A T-shaped connecting sleeve (8) is also provided between the forward nut (9) and the gasket (7), and the T-shaped connecting sleeve (8) includes a pressing plate (801), and a connecting hole adapted to the external pull screw (5) is provided on the pressing plate (801), and an outer sleeve (802) is connected to the connecting hole; when in use, the outer sleeve (802) is sleeved onto the external pull screw (5), the pressing plate (801) is tightly pressed onto the gasket (7), and then the forward nut (9) and the reverse nut (10) are screwed in sequentially.

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