Vertical shaft slipform hole groove inner mold fixing structure and fixing method

Abstract

The present invention relates to a fixing structure and fixing method of a shaft sliding formwork hole slot inner mold, the fixing structure includes a sliding formwork, a hole slot inner mold, a plate beam, distribution bars, main bars, reinforcing steel bars and fixed bars. During the casting and vibrating process of the sliding formwork, the hole slot inner mold will be subjected to asymmetric extrusion by the surrounding concrete, which is prone to torque rotation and disturbance offset. During the vertical lifting process of the sliding formwork, the hole slot inner mold will be subjected to an upward drag force, which is prone to vertical offset. A fixed bar is used to obliquely penetrate the top surface template and the inner vertical template of the hole slot inner mold, and is welded to the main bars or distribution bars. Cotton yarn is used to seal the perforations to conduct all the disturbance force and torque of the hole slot inner mold to the main bars or distribution bars, so as to ensure that the hole slot inner mold is firmly fixed and avoid the hole slot position offset. The present invention has the advantages of good structural integrity, fast construction speed, high quality pre-control, labor saving, and low engineering cost.

Description

Technical Field

[0001] The invention relates to the technical field of concrete construction, and in particular to a shaft slipform hole groove inner mold fixing structure and a fixing method. Background Art

[0002] Vertical shafts are widely used in engineering construction. During the construction process, it is difficult to fix the inner mold of the shaft slipform hole slot and control its shape, and the inner mold of the hole slot has a direct impact on the installation of the shaft precast slab beam. The traditional method is to weld multiple steel bars on the distribution reinforcement to support the outer template surface of the inner mold of the shaft slipform hole slot. This method increases the difficulty of construction in a small space, and the fixed steel bars are generally in oblique contact with the outer template surface. When the concrete is discharged and vibrated, the fixed steel bars are very easy to detach, which can easily cause the inner mold of the hole slot to deviate and affect the installation of the shaft precast slab beam. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a shaft slipform hole groove inner mold fixing structure and fixing method, which is convenient to construct, has a short construction period and low construction cost.

[0004] The technical solution adopted by the present invention is: a shaft sliding formwork hole groove inner mold fixing structure, including a sliding formwork, a hole groove inner mold, a plate beam, distribution bars, main bars, reinforcing steel bars and fixed bars, characterized in that: the sliding formwork is arranged in the vertical shaft, the hole groove inner mold is close to the inner side of the sliding formwork, and the hole groove inner mold is provided with reinforcing steel bars for structural reinforcement on the side of the inner vertical template; the fixed bars are obliquely inserted into the top surface template and the inner vertical template of the hole groove inner mold, and are welded to the main bars or distribution bars in the vertical shaft; after removing the hole groove inner mold, the plate beam can be embedded and installed in the hole groove.

[0005] Preferably, the upper opening of the sliding mold is provided with a vertical inclination angle α, and the hole groove inner mold is chamfered at the inclination angle α near the side of the sliding mold. The lower edge line of the hole groove inner mold is lengthened by △L under the premise of ensuring that the upper edge line of the hole groove inner mold does not encroach on the design structure line, so that the upper and lower edges of the hole groove inner mold are close to the inner side of the sliding mold. It is ensured that the sliding mold does not scratch the hole groove inner mold when it is lifted vertically. Compared with the conventional manufacturing method in which the hole groove inner mold is a vertical surface near the side of the sliding mold, the possibility of deviation of the hole groove inner mold can be greatly reduced, and the hole groove defects after the sliding mold is lifted can be avoided.

[0006] Preferably, the top surface template and the inner vertical template of the hole groove inner mold are expanded outward by an appropriate distance during manufacturing and processing to ensure that the fixed ribs do not encroach on the hole groove structural line when they are inserted into the hole groove inner mold.

[0007] Preferably, the top surface template and the inner vertical template of the hole groove inner mold are provided with reserved holes for the fixing ribs to pass through.

[0008] Furthermore, the fixed reinforcement is obliquely inserted through the reserved holes of the top surface template and the inner vertical template of the hole slot inner mold, and is welded and fixed to the main reinforcement or distribution reinforcement, and cotton yarn is used to seal the perforations. During the pouring and vibrating process of the sliding formwork, the hole slot inner mold will be asymmetrically squeezed by the surrounding concrete, which is prone to torque rotation and disturbance displacement. During the vertical lifting process of the sliding formwork, the hole slot inner mold will be subjected to an upward drag force, which is prone to vertical displacement. A fixed reinforcement is used to obliquely insert through the top surface template and the inner vertical template of the hole slot inner mold, and is welded to the main reinforcement or distribution reinforcement, and cotton yarn is used to seal the perforations, so as to transmit all the disturbance force and torque of the hole slot inner mold to the main reinforcement or distribution reinforcement, so as to ensure that the hole slot inner mold is firmly fixed and avoid the displacement of the hole slot position. As compensation for the encroachment of the fixed ribs on the space of the hole slot inner mold, the top surface template and the inner vertical template of the hole slot inner mold are expanded outward by an appropriate distance during manufacturing and processing to ensure that the fixed ribs do not encroach on the hole slot structural line when they penetrate the hole slot inner mold, thereby realizing one-time forming of the sliding mold hole slot.

[0009] A method for fixing an inner mold of a shaft sliding mold hole groove comprises the following steps:

[0010] a. The top surface template and the inner vertical template of the hole groove inner mold are expanded outward by an appropriate distance during the manufacturing process to ensure that the fixed ribs do not invade the hole groove structure line when they are inserted into the hole groove inner mold;

[0011] b. Locate and locate the oblique opening position of the fixing rib on the top surface template and the inner vertical template of the hole groove inner mold. The size of the opening should be slightly larger than the diameter of the fixing rib;

[0012] c. Prepare the shaft reinforcement formwork according to the design blueprint, place the hole slot inner formwork with the holes opened above between the reinforcing steel bars and the sliding formwork, and the reinforcing steel bars half-wrap the hole slot inner formwork for structural reinforcement;

[0013] d. Insert the fixed reinforcement obliquely through the reserved holes of the top template and the inner vertical template of the hole groove inner mold, and weld and fix them with the main reinforcement or distribution reinforcement. Use cotton yarn to seal the perforated parts to ensure that the hole groove inner mold is stable during the pouring process;

[0014] e. After the vertical shaft concrete pouring and sliding is completed, the inner formwork of the hole groove can be removed and the prefabricated slab beam can be embedded and installed in the hole groove, and then the second phase concrete construction of the hole groove can be carried out.

[0015] The beneficial effects achieved by the present invention are: compared with the existing technical solutions, the present invention has the advantages of good engineering quality and structural integrity, fast construction speed, high degree of quality pre-control, labor saving, low engineering cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a plan view of the present invention;

[0017] Figure 2 A perspective view of the present invention;

[0018] Figure 3 for Figure 2 Side view of;

[0019] Figure numerals: 1. Sliding formwork; 2. Inner formwork for hole grooves; 21. Top surface formwork; 22. Inner vertical formwork; 3. Plate beam; 4. Distribution reinforcement; 5. Main reinforcement; 6. Tie reinforcement; 7. Reinforcement reinforcement; 8. Fixing reinforcement. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] like Figure 1-3 As shown, a shaft slipform hole slot inner formwork fixing structure of the present invention comprises a slipform 1, a hole slot inner formwork 2, a plate beam 3, distribution bars 4, main bars 5, reinforcing steel bars 7 and fixed bars 8, the slipform 1 is arranged in the shaft, the hole slot inner formwork 2 is close to the inner side of the slipform 1, and the hole slot inner formwork 2 is provided with reinforcing steel bars 7 for structural reinforcement on the side of the inner vertical formwork 22, and the reinforcing steel bars 7 half-wrap the hole slot inner formwork 2 for structural reinforcement; the fixed bars 8 obliquely penetrate the top surface formwork 21 and the inner vertical formwork 22 of the hole slot inner formwork, and are welded to the main bars 4 or the distribution bars 5, and the top surface formwork 21 and the inner vertical formwork 22 of the hole slot inner formwork 2 are expanded outward by an appropriate distance during manufacturing and processing to ensure that the fixed bars 8 do not occupy the hole slot structural line when they penetrate the hole slot inner formwork 2; after the hole slot inner formwork 2 is removed, the plate beam 3 can be embedded and installed in the hole slot, and then the second phase concrete construction of the hole slot can be carried out.

[0022] Combination Figure 2 As shown, in this embodiment, the upper opening of the slipform 1 needs to be appropriately retracted when it is manufactured and installed to offset the side pressure of the concrete. Therefore, the slipform 1 itself has a small vertical inclination angle α. The manufacturing of the hole groove inner mold 2 needs to consider the influence of the inclination angle α, and the side of the hole groove inner mold 2 close to the slipform 1 is beveled according to the inclination angle α. On the premise that the upper edge line of the hole groove inner mold 2 does not encroach on the design structure line, the lower edge line of the hole groove inner mold 2 (compared with the upper edge line) is lengthened by △L (=h×tanα), so that the upper and lower edges of the hole groove inner mold 2 are close to the inner side of the slipform 1, so as to ensure that the slipform 1 does not scratch the hole groove inner mold 2 when it is lifted vertically. Compared with the conventional manufacturing method in which the hole groove inner mold 2 is a vertical surface close to the side of the slipform 1, the possibility of deviation of the hole groove inner mold 2 can be greatly reduced, thereby avoiding the occurrence of hole groove defects after the slipform 1 is lifted.

[0023] In this embodiment, the top template 21 and the inner vertical template 22 of the hole groove inner mold 2 are set out to locate the oblique opening position of the fixed rib 8, and the size of the opening is preferably slightly larger than the diameter of the fixed rib 8; the fixed rib 8 is obliquely inserted into the reserved holes of the top template 21 and the inner vertical template 22 of the hole groove inner mold 2, and is welded and fixed to the main rib 5 or the distribution rib 4, and the perforated part is sealed with cotton yarn to ensure that the hole groove inner mold is stable during the pouring process

[0024] During the pouring and vibrating process of the slipform 1, the hole slot inner mold 2 will be subjected to asymmetric extrusion by the surrounding concrete, which is prone to torque rotation and disturbance offset. During the vertical lifting process of the slipform 1, the hole slot inner mold 2 will be subjected to upward dragging force, which is prone to vertical offset. A fixed rib 8 is used to obliquely penetrate the top surface template 21 and the inner vertical template 22 of the hole slot inner mold 2, and is welded to the main rib 4 or the distribution rib 5. Cotton yarn is used to seal the perforations to conduct all the disturbance force and torque of the hole slot inner mold 2 to the main rib 4 or the distribution rib 5, to ensure that the hole slot inner mold 2 is firmly fixed and avoid the hole slot position offset. As compensation for the space encroachment of the fixed rib 8 on the hole slot inner mold 2, the top surface template 21 and the inner vertical template 22 of the hole slot inner mold 2 are expanded outward by an appropriate distance during the manufacturing process to ensure that the fixed rib 8 does not encroach on the hole slot structure line when it penetrates the hole slot inner mold 2, so as to achieve the one-time forming of the sliding formwork hole slot.

[0025] A method for fixing an inner mold of a shaft sliding mold hole groove of the present invention comprises the following steps:

[0026] a. The top surface template 21 and the inner vertical template 22 of the hole groove inner mold 2 are expanded outward by an appropriate distance during manufacturing and processing to ensure that the fixing rib 8 does not invade the hole groove structure line when it is inserted into the hole groove inner mold 2;

[0027] b. Locate and locate the oblique opening position of the fixing rib 8 on the top surface template 21 and the inner vertical template 22 of the hole groove inner mold 2. The size of the opening should be slightly larger than the diameter of the fixing rib 8;

[0028] c. Prepare the shaft reinforcement formwork according to the design blueprint, place the hole groove inner formwork 2 with the holes opened above between the reinforcing steel bars 7 and the sliding formwork 1, and the reinforcing steel bars 7 half-wrap the hole groove inner formwork 2 to reinforce the structure;

[0029] d. Insert the fixed rib 8 obliquely through the reserved holes of the top template 21 and the inner vertical template 22 of the hole groove inner mold 2, and weld and fix them with the main rib 4 or the distribution rib 5. Use cotton yarn to seal the perforated part to ensure that the hole groove inner mold is stable and immovable during the pouring process;

[0030] e. After the vertical shaft concrete pouring and sliding is completed, the inner mold 2 of the hole groove can be removed and the prefabricated slab beam 3 can be embedded and installed in the hole groove, and then the second phase concrete construction of the hole groove can be carried out.

[0031] The above shows and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A shaft sliding formwork hole slot inner mold fixing structure, comprising a sliding formwork (1), a hole slot inner mold (2), a plate beam (3), distribution bars (4), main bars (5), reinforcing steel bars (7) and fixing bars (8), characterized in that: The sliding form (1) is arranged in the shaft, the hole groove inner form (2) is closely attached to the inner side of the sliding form (1), and the hole groove inner form (2) is provided with reinforcing steel bars (7) for structural reinforcement on the side close to the inner vertical form (22); the fixed bars (8) obliquely penetrate the top surface form (21) and the inner vertical form (22) of the hole groove inner form (2), and are welded to the main bars (5) or the distribution bars (4) in the shaft; after the hole groove inner form (2) is removed, the plate beam (3) is embedded and installed in the hole groove.

2. The inner mold fixing structure of the vertical shaft sliding mold hole groove according to claim 1 is characterized in that: The upper opening of the sliding mold (1) is provided with a vertical inclination angle α, and the hole groove inner mold (2) is chamfered at the inclination angle α near the side of the sliding mold (1).

3. The inner mold fixing structure of the vertical shaft sliding mold hole groove according to claim 1 is characterized in that: The top surface template (21) and the inner vertical template (22) of the hole groove inner mold (2) are both expanded outwards.

4. The inner mold fixing structure of the vertical shaft sliding mold hole groove according to claim 1 is characterized in that: The top surface template (21) and the inner vertical template (22) of the hole groove inner mold (2) are provided with reserved holes for the fixing ribs (8) to pass through.

5. The inner mold fixing structure of the vertical shaft sliding mold hole groove according to claim 4 is characterized in that: The fixed ribs (8) are obliquely inserted through the reserved holes of the top surface template (21) and the inner vertical template (22) of the hole groove inner mold (2), and are welded and fixed to the main ribs (5) or the distribution ribs (4), and the perforations are sealed with cotton yarn.

6. A method for fixing the inner mold fixing structure of the shaft sliding mold hole groove according to any one of claims 1 to 5, comprising the following steps: a. The top surface template and the inner vertical template of the hole groove inner mold (2) are expanded outward by an appropriate distance during manufacturing and processing to ensure that the fixing rib (8) does not encroach on the hole groove structure line when it is inserted into the hole groove inner mold; b. Locate and locate the oblique opening positions of the fixing ribs (8) on the top surface template (21) and the inner vertical template (22) of the hole groove inner mold (2); c. Prepare the shaft reinforcement formwork according to the design requirements, place the hole groove inner formwork (2) with the holes already opened between the reinforcing steel bars (7) and the sliding formwork (1), and use the reinforcing steel bars (7) to half-wrap the hole groove inner formwork (2) to reinforce the structure; d. Insert the fixed reinforcement (8) obliquely through the reserved holes of the top template (21) and the inner vertical template (22) of the hole groove inner mold (2), and weld and fix them to the main reinforcement (5) or the distribution reinforcement (4). Use cotton yarn to seal the perforated part to ensure that the hole groove inner mold is stable and immovable during the pouring process; e. After the vertical shaft concrete pouring and sliding is completed, the inner mold (2) of the hole groove can be removed and the prefabricated slab beam (3) can be embedded and installed in the hole groove, and then the second phase concrete construction of the hole groove can be carried out.

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