Angle-adjustable bolt type steel formwork and construction method thereof

Abstract

The angle-adjustable bolt type steel formwork comprises a panel, a left vertical rib and a right vertical rib are fixedly welded to the left side and the right side of the panel respectively, an upper transverse rib and a lower transverse rib are fixedly welded to the upper end and the lower end of the panel respectively, and two middle transverse ribs are transversely and fixedly welded to the middle of the panel; a plurality of vertical plug pin holes are fixedly welded to the left vertical rib and the right vertical rib respectively, transverse plug pin holes are fixedly welded to the upper transverse rib and the lower transverse rib respectively, and a plurality of angle-adjustable plug pin type steel formworks can be combined and spliced in the transverse direction and the vertical direction. A plug pin shaft is arranged between every two adjacent plug pin holes in the two angle-adjustable plug pin type steel formworks which are spliced together in a penetrating mode. The device is simple in structure, the splicing connection angle is convenient to adjust, and the device can be suitable for concrete construction of tunnel vaults with different curvature radiuses; the bolt connecting system is simple and fast to mount and dismount; the method has the advantages of being reusable, attractive in concrete pouring and forming, low in comprehensive cost and the like.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering vault concrete construction, and in particular to an angle-adjustable pin-type steel formwork and a construction method thereof. Background Art

[0002] At present, some tunnels with smaller cross-sections cannot use formwork trolleys for lining pouring due to space limitations, and still use a combination of support frames and formwork for construction. Commonly used formworks include wooden formworks and steel formworks, among which steel formworks have the characteristics of multiple turnover, beautiful concrete pouring, and low overall cost. Steel formworks are usually rectangular, with a width of 100mm to 300mm, a length of 450mm to 1500mm, and a height of 55mm. They can be assembled and expanded in the length and width directions. Conventional steel formworks have tight joints, and the ribs around them are connected with high-strength bolts. Due to the large number of connecting bolts, the efficiency of installation and removal is extremely low. Conventional steel formworks can only be used for the construction of flat concrete components after assembly, but cannot be used for the construction of curved tunnel vault concrete.

[0003] In view of the above situation, when using the combination of support frame and steel formwork for tunnel vault concrete construction, a steel formwork that can realize curved surface assembly and rapid installation and disassembly is needed. Summary of the invention

[0004] The present invention aims to solve the deficiencies of the prior art and provides an angle-adjustable pin-type steel formwork and a construction method thereof.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an adjustable angle pin-type steel formwork, comprising a panel, a left vertical rib and a right vertical rib are respectively fixedly welded on the left and right sides of the panel, an upper transverse rib and a lower transverse rib are respectively fixedly welded on the upper and lower ends of the panel, two middle transverse ribs are transversely fixedly welded on the middle part of the panel, a plurality of vertical pin holes are respectively fixedly welded on the left vertical rib and the right vertical rib, and transverse pin holes are respectively fixedly welded on the upper transverse rib and the lower transverse rib, and a plurality of pieces of the adjustable angle pin-type steel formworks can be combined and assembled in the transverse and vertical directions, and a pin shaft is passed through the middle of two adjacent pin holes on two pieces of the adjustable angle pin-type steel formworks spliced ​​together.

[0006] Furthermore, the angles between the left vertical rib, the right vertical rib, the upper transverse rib, the lower transverse rib and the panel are 45°, and the angle between the middle transverse rib and the panel is 90°.

[0007] Furthermore, the pin holes on the left vertical rib and the pin holes on the right vertical rib are grouped in pairs, and the vertical spacing between the bottom surface of the pin holes on the left vertical rib and the top surface of the pin holes on the right transverse rib of the same group is 2 mm; the horizontal spacing between the left side surfaces of the pin holes on the upper transverse rib and the right side surfaces of the pin holes on the lower transverse rib is 2 mm.

[0008] Furthermore, the panel has a width of 100mm to 300mm, a length of 500mm to 1500mm, and a thickness of 4 to 6mm; the thickness of the left vertical rib, the right vertical rib, the upper transverse rib, the lower transverse rib, and the middle transverse rib is 8mm to 10mm, and the spacing between two adjacent transverse ribs remains consistent.

[0009] Furthermore, the pin hole is formed by curling a steel plate with a thickness of 6 mm to 8 mm, the height of the pin hole is 30 mm to 50 mm, and the hole diameter is 8 mm to 10 mm.

[0010] Furthermore, the latch shaft is L-shaped, the length of the long side of the latch shaft is 110 mm to 150 mm, the length of the long side is 3 times the length of the short side, the diameter is 6 mm to 8 mm, and the latch shaft is magnetic.

[0011] Furthermore, the joints between the adjustable angle latch-type steel formworks are filled with caulking glue.

[0012] A construction method for an adjustable angle bolt-type steel formwork, the construction method comprising the following steps:

[0013] S1. After the construction of the tunnel floor and side walls is completed, a tunnel vault concrete pouring construction plan is prepared based on the tunnel section size, lining thickness, surrounding rock conditions and other conditions, and the types of support frames and support trusses to be selected and their erection parameters are clearly specified;

[0014] S2, erect a full-height support frame inside the tunnel;

[0015] S3. Set up supporting trusses on the full-hall supporting frame;

[0016] S4. Lay the adjustable angle bolt-type steel formworks one by one on the supporting truss, and connect the adjustable angle bolt-type steel formworks through bolt shafts;

[0017] S5. Adjust the height adjustment handle of the full-chamber support frame to make the upper surface of the panel fit the lower contour line of the tunnel vault;

[0018] S6. Use caulking glue to fill the joints between the adjustable angle bolt-type steel formwork;

[0019] S7. Install the end formwork of the tunnel vault in accordance with conventional methods and pour the vault concrete;

[0020] S8. After the concrete solidifies and hardens to the specified strength, adjust the height adjustment handle of the full-floor support frame to make the supporting truss and the adjustable angle pin-type steel formwork fall, and then quickly remove the steel formwork by pulling open the pin shaft.

[0021] The beneficial effects of the present invention are as follows: the steel formwork involved in the present invention has a simple structure, and the angle adjustment range of the assembly connection reaches 0° to 90°, which can be applicable to the tunnel vault concrete construction with different curvature radii; the bolt connection system is simple and quick to install and disassemble, and the bolt shaft is magnetic and can be adsorbed on the rib plate to avoid loss; the steel formwork has the advantages of being able to be used multiple times, beautiful concrete casting and low comprehensive cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an adjustable angle bolt-type steel formwork;

[0023] Figure 2 It is a schematic diagram of the disassembly of the adjustable angle bolt type steel formwork;

[0024] Figure 3 It is a structural schematic diagram of the assembly of adjustable angle bolt-type steel formwork;

[0025] Figure 4 It is a structural schematic diagram of an adjustable angle bolt-type steel formwork and a support frame system;

[0026] In the figure: 1-panel; 2-left vertical rib; 3-right vertical rib; 4-upper transverse rib; 5-lower transverse rib; 6-middle transverse rib; 7-pin hole; 8-pin shaft; 9-caulking glue; 10-support truss; 11-full support frame; 12-height adjustment handle;

[0027] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with embodiments:

[0029] like Figure 1 to Figure 4 As shown, an adjustable angle latch type steel formwork comprises a panel 1, a left vertical rib 2 and a right vertical rib 3 are respectively fixedly welded on the left and right sides of the panel 1, an upper transverse rib 4 and a lower transverse rib 5 are respectively fixedly welded on the upper and lower ends of the panel 1, two middle transverse ribs 6 are transversely fixedly welded on the middle part of the panel 1, a plurality of vertical latch holes 7 are respectively fixedly welded on the left vertical rib 2 and the right vertical rib 3, and transverse latch holes 7 are respectively fixedly welded on the upper transverse rib 4 and the lower transverse rib 5. A plurality of pieces of the adjustable angle latch type steel formworks can be combined and assembled in the transverse and vertical directions, and a latch shaft 8 is passed through the middle of two adjacent latch holes 7 on two pieces of the adjustable angle latch type steel formworks spliced ​​together.

[0030] Specifically, for the horizontally spliced ​​adjustable angle pin-type steel formwork, the pin holes 7 on the right vertical rib 3 of the left steel formwork correspond one to one with the pin holes 7 on the left vertical rib 2 of the right steel formwork, and after adjustment and alignment, the pin shafts 8 are inserted respectively to fix them; for the vertically spliced ​​adjustable angle pin-type steel formwork, the pin holes 7 on the lower transverse rib 5 of the upper steel formwork correspond one to one with the pin holes 7 on the upper transverse rib 4 of the lower steel formwork, and after adjustment and alignment, the pin shafts 8 are inserted respectively to fix them.

[0031] The included angles between the left vertical rib 2, the right vertical rib 3, the upper transverse rib 4, the lower transverse rib 5 and the panel 1 are 45°, and the included angle between the middle transverse rib 6 and the panel 1 is 90°.

[0032] Specifically, the adjustable angle bolt-type steel formwork assembly angle can be adjusted within a range of 0° to 90°.

[0033] The pin holes 7 on the left vertical rib 2 and the pin holes 7 on the right vertical rib 3 are grouped in pairs, and the vertical spacing between the bottom surface of the pin holes 7 on the left vertical rib 2 and the top surface of the pin holes 7 on the right transverse rib 3 of the same group is 2 mm; the spacing between each adjacent group of pin holes 7 on the vertical ribs is the same.

[0034] The horizontal distance between the left side of the pin hole 7 on the upper transverse rib 4 and the right side of the pin hole 7 on the lower transverse rib 5 is 2 mm.

[0035] The panel 1 has a width of 100 mm to 300 mm, a length of 500 mm to 1500 mm, and a thickness of 4 to 6 mm; the thickness of the left vertical rib 2, the right vertical rib 3, the upper transverse rib 4, the lower transverse rib 5, and the middle transverse rib 6 is 8 mm to 10 mm, and the spacing between two adjacent transverse ribs is kept consistent.

[0036] The pin hole 7 is formed by curling a steel plate with a thickness of 6 mm to 8 mm. The height of the pin hole 7 is 30 mm to 50 mm, and the hole diameter is 8 mm to 10 mm.

[0037] The latch shaft 8 is L-shaped, the long side length of the latch shaft 8 is 110 mm to 150 mm, the long side length is 3 times the short side length, the diameter is 6 mm to 8 mm, and the latch shaft 8 is magnetic.

[0038] Specifically, the latch shaft 8 can be adsorbed on the rib plate and is not easy to be lost.

[0039] The joints between the adjustable angle bolt-type steel templates are filled with a caulking glue 9.

[0040] A construction method for an adjustable angle bolt-type steel formwork, the construction method comprising the following steps:

[0041] S1. After the tunnel floor and side wall construction is completed, a tunnel vault concrete pouring construction plan is prepared according to the tunnel section size, lining thickness, surrounding rock conditions and other conditions, and the type of support frame and support truss 10 selected and their erection parameters are clearly specified;

[0042] S2, erecting a full-height support frame 11 inside the tunnel;

[0043] S3, erecting a supporting truss 10 on the full-hall supporting frame 11;

[0044] S4, laying the adjustable angle bolt type steel formworks one by one on the supporting truss 10, and connecting the adjustable angle bolt type steel formworks through the bolt shaft 8;

[0045] S5, adjusting the height adjustment handle 12 of the full-chamber support frame 11 so that the upper surface of the panel 1 fits the lower contour line of the tunnel vault;

[0046] S6. Use caulking glue 9 to fill the joints between the adjustable angle bolt-type steel formworks;

[0047] S7. Install the end formwork of the tunnel vault in accordance with conventional methods and pour the vault concrete;

[0048] S8. After the concrete solidifies and hardens to reach the specified strength, adjust the height adjustment handle 12 of the full-floor support frame 11 to make the support truss 10 and the adjustable angle latch-type steel formwork fall, and then quickly remove the steel formwork by pulling open the latch shaft 8.

[0049] The above is an exemplary description of the present invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An adjustable angle bolt type steel formwork, characterized in that: The invention comprises a panel (1), wherein a left vertical rib (2) and a right vertical rib (3) are respectively fixedly welded on the left and right sides of the panel (1), an upper transverse rib (4) and a lower transverse rib (5) are respectively fixedly welded on the upper and lower ends of the panel (1), two middle transverse ribs (6) are transversely fixedly welded in the middle of the panel (1), a plurality of vertical latch holes (7) are respectively fixedly welded on the left vertical rib (2) and the right vertical rib (3), and transverse latch holes (7) are respectively fixedly welded on the upper transverse rib (4) and the lower transverse rib (5), and a plurality of adjustable angle latch-type steel templates can be assembled and combined in the transverse and vertical directions, and a latch shaft (8) is passed through the middle of two adjacent latch holes (7) on two pieces of the adjustable angle latch-type steel templates that are assembled together.

2. The adjustable angle bolt type steel formwork according to claim 1, characterized in that: The angles between the left vertical rib (2), the right vertical rib (3), the upper transverse rib (4), the lower transverse rib (5) and the panel (1) are 45°, and the angle between the middle transverse rib (6) and the panel (1) is 90°.

3. The adjustable angle bolt type steel formwork according to claim 1, characterized in that: The pin holes (7) on the left vertical rib (2) and the pin holes (7) on the right vertical rib (3) are arranged in groups of two, and the vertical spacing between the bottom surface of the pin holes (7) on the left vertical rib (2) and the top surface of the pin holes (7) on the right transverse rib (3) of the same group is 2 mm; the horizontal spacing between the left side surface of the pin holes (7) on the upper transverse rib (4) and the right side surface of the pin holes (7) on the lower transverse rib (5) is 2 mm.

4. The adjustable angle bolt type steel formwork according to claim 1, characterized in that: The panel (1) has a width of 100 mm to 300 mm, a length of 500 mm to 1500 mm, and a thickness of 4 to 6 mm; the thickness of the left vertical rib (2), the right vertical rib (3), the upper transverse rib (4), the lower transverse rib (5), and the middle transverse rib (6) is 8 mm to 10 mm, and the spacing between two adjacent transverse ribs is kept consistent.

5. The angle-adjustable pin-type steel formwork according to claim 4, characterized in that: The pin hole (7) is formed by curling a steel plate with a thickness of 6 mm to 8 mm. The height of the pin hole (7) is 30 mm to 50 mm, and the hole diameter is 8 mm to 10 mm.

6. The adjustable angle bolt type steel formwork according to claim 5, characterized in that: The latch shaft (8) is L-shaped, the length of the long side of the latch shaft (8) is 110 mm to 150 mm, the length of the long side is 3 times the length of the short side, the diameter is 6 mm to 8 mm, and the latch shaft (8) is magnetic.

7. The angle-adjustable bolt-type steel formwork according to claim 1, characterized in that: The joints between the adjustable angle bolt-type steel templates are filled with caulking glue (9).

8. A construction method of an adjustable angle bolt-type steel formwork according to claim 7, characterized in that: The construction method comprises the following steps: S1. After the tunnel floor and side wall are constructed, a tunnel vault concrete pouring construction plan is prepared according to the tunnel section size, lining thickness, surrounding rock conditions and other conditions, and the type of support frame and support truss (10) to be selected and their erection parameters are clearly specified; S2, erecting a full-height support frame (11) inside the tunnel; S3, erecting a supporting truss (10) on the full-chamber supporting frame (11); S4, laying the adjustable angle latch-type steel formworks one by one on the supporting truss (10), and connecting the adjustable angle latch-type steel formworks via latch shafts (8); S5, adjusting the height adjustment handle (12) of the full-chamber support frame (11) so that the upper surface of the panel (1) fits the lower contour line of the tunnel vault; S6, using a caulking glue (9) to fill the joints between the adjustable angle bolt type steel formworks; S7. Install the end formwork of the tunnel vault in accordance with conventional methods and pour the vault concrete; S8. After the concrete solidifies and hardens to a specified strength, the height adjustment handle (12) of the full-floor support frame (11) is adjusted to allow the support truss (10) and the adjustable angle latch-type steel formwork to fall, and then the steel formwork is quickly removed by pulling open the latch shaft (8).

Images