Quick form removal device for large-size pier and abutment of wharf

Abstract

The utility model provides a quick form removal device for a large-size pier of a wharf, which comprises a base, a top plate arranged above the base, clamping vertical plates arranged on one side, close to a notch, of the top plate, clamping plates capable of moving relatively are arranged between the clamping vertical plates, a jack is further arranged between the top plate and the base, the notch is arranged on one side of the base, and the notch is arranged on the other side of the base. According to the device, horizontal descending of the formwork can be kept when a hanging-pulling type bottom formwork dismantling method is used, the stability in the formwork dismantling process and the safety of the structure are guaranteed, and the risk that components are damaged or collapsed possibly due to uneven stress is reduced; according to the device, the working efficiency of construction of the large-size pier and abutment of the wharf is improved, meanwhile, the safety risk in the construction process is reduced, and the problem that when a hanging-pulling type bottom die dismantling method is used, horizontal descending is inconvenient to maintain when a bottom die supporting structure is dismantled through a common jack is solved.

Description

Technical Field

[0001] The utility model relates to the field of rapid construction of large-volume piers, in particular to a rapid formwork removal device for large-volume piers at docks. Background Art

[0002] With the vigorous development of my country's water transport engineering, cast-in-place solid piers are widely used in the construction of docks. The piers are large in size and the bottom formwork support structure is difficult to dismantle. The traditional pier construction platform erection process uses a corbel and transverse and longitudinal beam load-bearing bottom formwork method. For projects with pier design elevations that are too low, the welded corbels are seriously affected by the tide and cannot meet the owner's construction period requirements.

[0003] At present, when dismantling the pier bottom formwork, unloading sand boxes are mostly used, which involves many underwater operations, high safety risks and low construction efficiency. When using the hanging-pull bottom formwork removal method, two small jacks are used to support the tensioning device from both sides for dismantling. This method has the risk of the finished rolled rebar tilting and bending due to the inconsistent descending speed of the jacks on both sides. Therefore, a demoulding device that can continuously maintain a horizontal position during the descent process is needed. Utility Model Content

[0004] The main purpose of the utility model is to provide a rapid formwork removal device for large-volume piers of a dock, which solves the problem that when using a hanging-type bottom formwork removal method, it is inconvenient to use an ordinary jack to maintain a horizontal descent when removing the bottom formwork support structure.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a rapid formwork removal device for large-volume piers of a dock, the formwork removal device includes a base, a top plate is provided above the base, a clamping plate is provided on the side of the top plate close to the notch, and relatively movable clamping plates are provided between the clamping plates;

[0006] A jack is also provided between the top plate and the base. A notch is provided on one side of the base, and a roller is provided on the other side. A handle is provided above the roller.

[0007] In the preferred embodiment, a clamping groove is provided on one side opposite to the clamping plate, and a guide column is provided between the clamping plate and the clamping vertical plate.

[0008] In the preferred embodiment, a plurality of guide holes are provided on one side of the base, and slidable guide rods are coaxially arranged in the guide holes;

[0009] The guide rod is arranged between the base and the top plate.

[0010] In the preferred embodiment, a screw is provided between the clamping plate and the clamping vertical plate, and the clamping plate is provided on the screw. When the screw is rotated, the clamping plate moves relative to the screw at the same time.

[0011] In a preferred embodiment, the screw rod passes through the clamping vertical plates on both sides, the screw rod is rotatably connected to the clamping vertical plates on both sides, and rotating rings are provided at both ends of the screw rod.

[0012] In a preferred embodiment, a detachable extension sleeve is further provided in the notch, and the extension sleeve is used to facilitate the operator to remove the upper screw sleeve.

[0013] In a preferred embodiment, a plurality of anti-slip grooves are provided in the clamping groove, and the anti-slip grooves are semicircular.

[0014] The utility model provides a rapid formwork removal device for large-volume piers of a wharf, which has the following beneficial effects:

[0015] 1. The device has a simple structure and can be operated by one person, which greatly reduces the demand for manpower and labor intensity. A roller is provided on one side of the device, which makes the turnover of the equipment more convenient and shortens the construction period.

[0016] 2. This device can keep the formwork level when using the lifting-type bottom formwork removal method, ensuring the stability of the formwork removal process and the safety of the structure, reducing the risk of component damage or collapse caused by uneven force. This device improves the work efficiency of large-volume pier construction at the wharf, while reducing safety risks during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 It is a schematic diagram of the first pouring of concrete of the utility model;

[0019] Figure 2 This is a schematic diagram of the installation of the tensioning device of the utility model;

[0020] Figure 3 It is an enlarged view of the tensioning device of the utility model;

[0021] Figure 4 It is a cross-sectional view of the demoulding device of the utility model;

[0022] Figure 5 This is a schematic diagram of the axial layout of the demoulding device of the utility model;

[0023] Figure 6 It is an axonometric view of the mold removal device of the utility model;

[0024] Figure 7 It is a cross-sectional view of the clamping vertical plate of the utility model;

[0025] Figure 8 It is a front view of the demoulding device of the utility model.

[0026] In the figure: pier 1; bottom formwork support plate 2; side formwork support plate 3; concrete 4; tensioning device 5; precision-rolled threaded steel bar 501; upper screw sleeve 502; load-bearing pad 503; lower screw sleeve 504; lifting buckle 505; PVC pipe 6; demoulding device 7; base 701; top plate 702; jack 703; handle 704; guide rod 705; roller 706; clamping plate 707; guide hole 708; guide column 709; notch 710; clamping plate 711; screw 712; rotating ring 713; extension sleeve 714; clamping groove 715; clamping hoop 8. DETAILED DESCRIPTION

[0027] Example 1

[0028] like Figure 1-8 As shown, a rapid formwork removal device for a large-volume pier at a dock is provided. The formwork removal device 7 includes a base 701. A top plate 702 is provided above the base 701. A clamping plate 711 is provided on one side of the top plate 702 near a notch 710. A relatively movable clamping plate 707 is provided between the clamping plates 711.

[0029] A jack 703 is provided between the top plate 702 and the base 701 . A notch 710 is provided on one side of the base 701 , and a roller 706 is provided on the other side. A handle 704 is provided above the roller 706 .

[0030] In the preferred embodiment, a clamping groove 715 is provided on one side opposite to the clamping plate 707 , and a guide column 709 is provided between the clamping plate 707 and the clamping vertical plate 711 .

[0031] In the preferred embodiment, a plurality of guide holes 708 are provided on one side of the base 701, and slidable guide rods 705 are coaxially arranged in the guide holes 708;

[0032] The guide rod 705 is disposed between the base 701 and the top plate 702 .

[0033] In the preferred embodiment, a screw 712 is provided between the clamping plate 707 and the clamping plate 711. The clamping plate 707 is provided with the screw 712. When the screw 712 is rotated, the clamping plate 707 moves relative to the screw 712 at the same time.

[0034] In a preferred embodiment, the screw rod 712 passes through the clamping upright plates 711 on both sides, the screw rod 712 is rotatably connected to the clamping upright plates 711 on both sides, and a rotating ring 713 is provided at both ends of the screw rod 712 .

[0035] In a preferred embodiment, a detachable extension sleeve 714 is further provided in the notch 710 , and the extension sleeve 714 is used to facilitate the operator to remove the upper screw sleeve 502 .

[0036] In a preferred embodiment, a plurality of anti-slip grooves are provided in the clamping groove 715 , and the anti-slip grooves are semicircular.

[0037] Example 2

[0038] like Figure 1-8 As shown, a method for rapid construction of large-volume piers at a wharf comprises:

[0039] S1. Pour concrete in 4 layers and calculate the load of each pour;

[0040] S2. Set up the bottom formwork support structure and reserve vertical PVC pipe 6;

[0041] S3, pouring the first layer of concrete 4;

[0042] S4, extend the PVC pipe 6 and pour the next layer of concrete 4;

[0043] S5, repeat step S4 until the pier pouring is completed;

[0044] S6. Install the tensioning device 5 at the PVC pipe 6 and secure it;

[0045] S7, cut off the steel bull leg;

[0046] S8. Use the demoulding device 7 to lower the bottom mold support structure, pull out the distribution beam and secondary beam, pull out the main beam, and remove the panel.

[0047] In the preferred embodiment, in step S1, the initial pouring of concrete 4 has a layer height of 0.6 to 1 m;

[0048] In step S1, a finite element model of the pile and the first pour of concrete 4 is established, and the pouring layer thickness is determined through calculation and analysis; the load of the second pour of concrete 4 is applied to the top surface of the first pour of concrete 4; if the calculation result shows a large-area tensile stress and the value is large, the thickness of the first pour of concrete 4 is increased, or the thickness of the second pour of concrete 4 is reduced;

[0049] If the bottom formwork support system is not fully loaded, increase the thickness of the first concrete pour. If the bottom formwork support system is close to its limit, increase the concrete pouring layer and reduce the thickness of the second concrete pour.

[0050] If the calculation results show no tensile stress, or the tensile stress distribution range is very small and the value is much smaller than the designed tensile strength, then reduce the thickness of the first pouring of concrete 4, or increase the thickness of the second pouring of concrete 4; if the calculation results show that the tensile stress within 1MPa exists only near the top of the concrete 4 above the pile top, then install a steel mesh in the pier concrete 4 above the pile top;

[0051] In a preferred embodiment, in step S2, the bottom formwork support structure includes steel brackets, main beams, secondary beams, distribution beams, and panels; during installation, the steel brackets are first welded, and then the main beams, secondary beams, distribution beams, and panels are installed in sequence;

[0052] In step S2, a hole is opened in the panel corresponding to the PVC pipe 6, the bottom of the pipe passes through the bottom form support structure, and the top is 10 cm higher than the initial pouring of concrete 4;

[0053] In step S6, the fine-rolled threaded steel 501 passes through the main beam and a pad and bolts are set at the bottom. After the steel corbel is cut off, the fine-rolled threaded steel 501 bears the deadweight of the bottom mold support structure.

[0054] In the preferred embodiment, the bottom formwork support structure includes a plurality of hoops 8, which are arranged on the pier 1. A bottom formwork support plate 2 is provided above the hoops 8, and a plurality of steel corbels are provided above the bottom formwork support plate 2. A casting bottom formwork is provided above the steel corbels, and side formwork support plates 3 and casting side formwork are symmetrically provided on both sides of the casting bottom formwork.

[0055] In a preferred embodiment, the tensioning device 5 in step S6 includes a finished rolled threaded steel bar 501, which passes through the PVC pipe 6. An upper threaded sleeve 502 is provided above the finished rolled threaded steel bar 501, and a lower threaded sleeve 504 is provided below the finished rolled threaded steel bar 501.

[0056] A weighing pad 503 is further provided between the upper screw sleeve 502 and the PVC pipe 6 . The upper screw sleeve 502 is arranged above the concrete 4 , and the lower screw sleeve 504 is arranged below the concrete 4 . The tensioning device 5 is used to tighten the bottom form support plate 2 .

[0057] In the preferred embodiment, a detachable lifting buckle 505 is further provided on the top of the finished rolled threaded steel bar 501 .

[0058] In a preferred embodiment, the demoulding device 7 in step S8 includes a base 701, a top surface of the base 701 is provided with a plurality of guide holes 708, and slidable guide rods 705 are coaxially arranged in the guide holes 708;

[0059] A top plate 702 is provided on the top of the guide rod 705 , and a jack 703 is provided between the top plate 702 and the base 701 . A notch 710 is provided on one side of the base 701 , and a roller 706 is provided on the other side. A handle 704 is provided above the roller 706 .

[0060] In the preferred embodiment, a clamping plate 711 is provided on one side of the top plate 702 near the notch 710 , and a relatively movable clamping plate 707 is provided between the clamping plates 711 ;

[0061] A clamping groove 715 is provided on one side opposite to the clamping plate 707 , and a guide post 709 is provided between the clamping plate 707 and the clamping vertical plate 711 .

[0062] In the preferred embodiment, a screw 712 is further provided between the clamping plate 707 and the clamping vertical plate 711. The clamping plate 707 is arranged on the screw 712. When the screw 712 is rotated, the clamping plate 707 moves relative to the screw 712 at the same time.

[0063] The screw rod 712 passes through the clamping upright plates 711 on both sides. The screw rod 712 is rotatably connected to the clamping upright plates 711 on both sides. Rotating rings 713 are provided at both ends of the screw rod 712 .

[0064] In the preferred embodiment, a detachable extension sleeve 714 is further provided in the notch 710 , and the extension sleeve 714 is used to facilitate the operator to remove the upper screw sleeve 502 ;

[0065] A plurality of anti-skid grooves are provided in the clamping groove 715 . The anti-skid grooves are semicircular in shape, and the groove walls are perpendicular to the axial direction of the fine-rolled threaded steel bar 501 .

[0066] A method for rapid construction of large-volume piers at a wharf is specifically implemented as follows:

[0067] S1. Concrete layering. Calculate the load for each pour. The initial pouring layer height is 0.6-1m. Build a finite element model of the pile and the first pour, and determine the pouring layer thickness through calculation and analysis. Apply the load of the second pour to the top surface of the first pour. If the calculation results indicate large-area tensile stress, and the value is large, increase the thickness of the first pour or reduce the thickness of the second pour.

[0068] If the calculation results show no tensile stress, or the tensile stress distribution range is very small and the value is much smaller than the design tensile strength, the thickness of the first concrete pouring should be reduced, or the thickness of the second concrete pouring should be increased; if the calculation results show that the tensile stress within 1MPa exists only near the top of the concrete above the pile top, a steel mesh should be installed in the pier concrete above the pile top;

[0069] S2. Use a clamp 8 to clamp onto the pier column 1, and set up a bottom formwork support plate structure above the clamp 8. The bottom formwork support structure includes a steel corbel, a main beam, a secondary beam, a distribution beam, and a panel. During installation, the steel corbel is first welded, and then the main beam, the secondary beam, the distribution beam, and the panel are installed in sequence. A bottom formwork support plate 2 is provided below the steel corbel, and the bottom formwork support plate 2 is arranged above the pier column 1. A clamp 8 is provided between the bottom formwork support plate 2 and the pier column 1.

[0070] A casting bottom formwork is arranged above the steel corbel. Side formwork support plates 3 and casting side formwork are symmetrically arranged on both sides of the casting bottom formwork. A vertical PVC pipe 6 is reserved. A hole is opened in the panel at the corresponding position of the PVC pipe 6. The bottom of the pipe passes through the bottom formwork support structure, and the top is 10 cm higher than the initial concrete pouring.

[0071] S3, pour the first layer of concrete 4. When pouring, pay attention to even pouring, and do not pour a large amount of concrete in a concentrated manner to avoid stress concentration;

[0072] S4, after the first layer of concrete 4 has initially set, the PVC pipe 6 is extended and the next layer of concrete 4 is poured;

[0073] S5, repeat step S4 until the pier pouring is completed;

[0074] S6. Install the load-bearing pad 503 above the PVC pipe 6. The load-bearing pad can prevent the upper screw sleeve 502 from directly crushing the concrete 4. Then install the tensioning device 5 and fix it. The installation process is as follows: first make the finished rolled threaded steel 501 pass through the PVC pipe 6 and the load-bearing pad 503, install the lower screw sleeve 504 at its bottom end, and install the upper screw sleeve 502 above the load-bearing pad 503;

[0075] S7. After each tensioning device 5 is installed, cut off the lower steel corbel and remove the clamp 8 on the bottom pier 1. The cutting of the steel corbel and the removal of the clamp 8 should comply with the principle of uniform stress. Cut from the middle to both sides to avoid stress concentration on one side. After the steel corbel is cut off, the fine-rolled threaded steel 501 bears the deadweight of the bottom mold support structure.

[0076] S8. When removing the formwork, use the demoulding device 7 to lower the bottom formwork support structure, pull out the distribution beam and secondary beam, pull out the main beam, and remove the panel. This demoulding device 7 is small and flexible, and the demoulding method is also relatively flexible.

[0077] The method is as follows: move the demoulding device 7 to the tensioning device 5, and press the handle 704 in the demoulding device 7 downward to form a lever at the roller 706, so that the roller 706 can roll above the concrete 4, making it easier for the operator to move the demoulding device 7;

[0078] The rotating ring 713 is rotated to open the clamping plate 707. A steel rod or other rod-shaped object can be inserted into the rotating ring 713 to facilitate clamping the finished threaded steel bar 501. The extension sleeve 714 is first sleeved on the tensioning device 5 to be removed. After the clamping plate 707 is opened, the demoulding device 7 is pushed so that the notch 710 is aligned with the extension sleeve 714. The finished threaded steel bar 501 is just located between the clamping grooves 715. The rotating ring 713 is rotated to clamp the clamping grooves 715 to clamp the finished threaded steel bar 501.

[0079] After clamping the finished rolled threaded steel bar 501, rotate the extension sleeve 714 to loosen the upper threaded sleeve 502, so that the upper threaded sleeve 502 moves upward to the designed distance. Then, rotate the rotating ring 713 to loosen the clamping groove 715. At this time, the finished rolled threaded steel bar 501 will fall down a short distance due to the weight of the bottom die support structure below. Then, repeat the above mold removal operation with the next tensioning device 5 until the bottom die support structure is completely removed.

[0080] This method is mostly used in scenarios where there is a shortage of on-site operational equipment. If two small jacks are used to support the tensioning device 5 from both sides for removal, there is a risk that the tensioning device 5 may tilt or bend due to the inconsistent descending speeds of the jacks on both sides. Therefore, it is safer to use a dedicated demoulding device 7.

[0081] When there is more than one demoulding device 7, the following can be used: Figure 5 The diagonal formwork removal method shown in the figure enables points A, B, C, and D to be removed in pairs. For example, points A and D are removed first, and then points B and D are removed, to ensure that the bottom formwork support structure is evenly stressed. If there are four formwork removal devices 7, the four points can be removed simultaneously. This formwork removal device is simple and easy to operate, and the corresponding number of devices can be arranged according to the actual construction progress to ensure the formwork removal speed and improve the overall construction progress.

[0082] The top of the tensioning device 5 is also provided with a lifting buckle 505. When there is a crane on site, the lifting buckle 505 can be directly installed on the top of the finished rolled threaded steel bar 501, and the crane can be used instead of the demolding device 7 for demolding.

[0083] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A rapid formwork removal device for large-volume piers at a wharf, characterized by: The demoulding device (7) comprises a base (701), a top plate (702) is provided above the base (701), a clamping vertical plate (711) is provided on one side of the top plate (702) close to the notch (710), and relatively movable clamping plates (707) are provided between the clamping vertical plates (711); A jack (703) is further provided between the top plate (702) and the base (701); a notch (710) is provided on one side of the base (701); a roller (706) is provided on the other side; and a handle (704) is provided above the roller (706).

2. According to claim 1, a rapid formwork removal device for large-volume piers at a wharf is characterized by: A clamping groove (715) is provided on one side opposite to the clamping plate (707), and a guide column (709) is provided between the clamping plate (707) and the clamping vertical plate (711).

3. According to claim 1, a rapid formwork removal device for large-volume piers at a wharf is characterized by: A plurality of guide holes (708) are provided on one side of the base (701), and slidable guide rods (705) are coaxially arranged in the guide holes (708); The guide rod (705) is arranged between the base (701) and the top plate (702).

4. According to claim 1, a rapid formwork removal device for large-volume piers at a wharf, characterized in that: A screw rod (712) is also provided between the clamping plate (707) and the clamping vertical plate (711), and the clamping plate (707) is provided on the screw rod (712). When the screw rod (712) is rotated, the clamping plate (707) and the screw rod (712) move relatively at the same time.

5. According to claim 4, a rapid formwork removal device for large-volume piers at a wharf is characterized by: The screw rod (712) passes through the clamping upright plates (711) on both sides. The screw rod (712) is rotatably connected to the clamping upright plates (711) on both sides. Rotating rings (713) are provided at both ends of the screw rod (712).

6. According to claim 1, a rapid formwork removal device for large-volume piers at a wharf is characterized by: A detachable extension sleeve (714) is also provided in the notch (710), and the extension sleeve (714) is used to facilitate an operator to remove the upper screw sleeve (502).

7. According to claim 2, a rapid formwork removal device for large-volume piers at a wharf is characterized by: A plurality of anti-skid grooves are provided in the clamping groove (715), and the anti-skid grooves are semicircular.

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