Construction method suitable for arch bridge formwork supporting system to use jacking device

Abstract

The invention discloses a construction method suitable for an arch bridge formwork supporting system to use a jacking device, and relates to the technical field of buildings. The jacking device suitable for the arch bridge formwork supporting system comprises an existing transformed jacking and an adjusting matching block, and the existing transformed jacking comprises a screw adjusting wheel, a screw rod piece, a jacking plate, an adjusting notch and a bolt adjusting hole. According to the construction method suitable for the jacking device used by the arch bridge formwork supporting system, the structure is simple, and the jacking device adopts modular design, is compact in structure and is easy to mount and dismount. Adjustment is convenient, the height of the matched block supporting plate can be conveniently and rapidly adjusted through the adjusting nut, and the construction requirements of different radians (angles) are met. Effective limiting: the placement position of the supporting stress cross beam can be effectively limited and fixed through the limiting fixing column, so that the jack and the axis of a template supporting vertical rod at the lower part of the jack are pressed, the vertical rod is prevented from being eccentrically pressed, and the stress of a supporting system is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a construction method using a jacking device suitable for an arch bridge formwork support system. Background Art

[0002] In arch bridge construction, the formwork support system is one of the key factors to ensure construction quality and safety. With the continuous development of arch bridge design and construction technology, the requirements for the formwork support system are getting higher and higher. Large-span, heavy-loaded arch bridges emerge in an endless stream. The jacking used by the traditional and existing improved formwork support systems has great limitations in terms of stability, adjustability, construction efficiency and safety for arch bridge construction. Therefore, it is particularly important to develop a new type of jacking device suitable for arch bridge formwork support systems.

[0003] As an important part of the formwork support system, the design and performance of the jacking device directly affect the stability and reliability of the entire support system. At present, there are many types of jacking devices on the market, but there are not many jacking devices designed for the characteristics of the arch bridge formwork support system. Therefore, the development of a jacking device specifically suitable for the arch bridge formwork support system has urgent practical significance and broad market prospects.

[0004] The top supports used in the existing construction methods of the project cannot ensure that they are fully fitted with the arc-shaped supporting beams of the arch bridge and are evenly stressed. Affected by the curvature of the arch bridge, the stress-bearing surface is generally only about 1 / 3 of the top support surface, or even less. Some projects use wood chips for reinforcement, which is not only time-consuming and labor-intensive, but also cannot be effectively fixed and is very easy to fall off. In addition, the stress-bearing beam in the top support area can be regarded as a diagonal line. The contact surface between it and the top support cannot be guaranteed to be fully fitted due to the uneven size of the chip blocks, and the top support cannot be effectively and evenly stressed. The patent of the present invention circumvents this drawback through an adjustable height top support device, and realizes flexible height adjustment by adjusting the nut, so that the stress-bearing beam of the formwork support system and the contact surface of the top support device are fully fitted and evenly stressed.

[0005] Common arch bridge formwork support beam materials generally include square timber, steel or mixed support. These support methods generally have the problem that the center of gravity cannot be effectively guaranteed to be in the same position as the top support and the lower support uprights during existing top support construction, resulting in eccentric compression and uneven force on the formwork support system, which is not conducive to the force of the entire support system. In severe cases, it may cause the support system to become unstable. The patent of the present invention effectively limits the crossbeam placement area by adjusting the position of the bolts to ensure that the center of gravity of the stressed crossbeam is basically consistent with the center of gravity of the top support and its lower support uprights, thereby ensuring that the axial compression of the formwork support system is better guaranteed to ensure the stability of the support system.

[0006] In summary, a jacking device suitable for use in the arch bridge formwork support system comprehensively considers factors such as the stability, adjustability and construction efficiency of the formwork support system to meet the special needs of arch bridge construction. The development of this new jacking device will help improve the performance and quality of the arch bridge formwork support system and promote the development of arch bridge construction technology. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] In view of the deficiencies in the prior art, the present invention provides a construction method for using a jacking device in an arch bridge formwork support system, thereby solving the problems existing in the prior art.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a jacking device suitable for use in an arch bridge formwork support system, comprising two components: an existing modified jacking support and an adjustment block, wherein the existing modified jacking support comprises a screw adjustment wheel, a screw rod, a jacking support plate, an adjustment slot and a bolt adjustment hole, and the adjustment block comprises an adjustable support plate, a supporting load-bearing beam limit fixing column, a height adjustment bolt, a height adjustment nut, a limit clamp and a locking bolt.

[0011] Screw adjusting wheel: It is composed of an adjusting nut with two wings, which can be adjusted up and down to make the top support close to the formwork supporting beam until it reaches the appropriate position.

[0012] Screw rod: Top support screw rod, used for top support force, the lower end is fixed in the vertical pole of the support system, and the upper end is provided with a support plate for supporting the formwork beam.

[0013] Top support plate: It is used to support and adjust the matching block in this device, and it supports the upper part together with the template support beam to transmit the load.

[0014] Adjustment slot: It is a long horizontal slot, which is convenient for adjusting the height of the rear end steel plate of the support plate in the matching block. The slot size is slightly larger than the size of the rear end steel plate, which is convenient for adjusting the up and down height of the steel plate.

[0015] Bolt adjustment holes: two symmetrical longitudinal elliptical holes, which are convenient for adjusting the adjusting bolts of the matching block up and down according to the curvature of the arch bridge, and leave a certain amount of movable space to prevent the bolt adjustment from being restricted.

[0016] Adjustment support plate: It is made of three steel plates of different sizes. The front side plate is hung down about mm to facilitate engagement with the lower top support (surface) plate. The middle is a stress-bearing surface steel plate, which is used to fit closely with the upper scaffolding support beam. The rear end uses a steel plate with a height of about (400) mm, which is inserted into the adjustment slot of the lower top support and can be moved up and down to adjust the height.

[0017] Support the load-bearing beam limit fixing column (22 arranged symmetrically at two locations): two limit devices protruding from the adjustment support plate surface, with a height of about mm, the distance between the two is slightly larger than the width of the load-bearing beam, and are connected to the adjustment support plate by welding.

[0018] Height adjustment bolts: Two symmetrically arranged screws are used to adjust the height of the pallet.

[0019] Height adjustment nuts: Two adjustment nuts, which are used to cooperate with the adjustment bolts to tighten the height of the support plate after it is adjusted into place.

[0020] Limiting card plate: It is an annular card plate structure, which is composed of four steel plates surrounding the adjusting steel plate at the rear end of the adjustable support plate. It can move up and down along the adjusting steel plate to limit the steel plate.

[0021] Locking bolt: It consists of two locking bolts. When the adjusting steel plate at the rear end of the adjustable pallet is adjusted to a suitable height, the limiting card is firmly locked by rotating the locking bolts, thereby achieving height adjustment and effective force at the rear end of the adjustable pallet.

[0022] A construction method applicable to an arch bridge formwork support system using a jacking device, comprising the above-mentioned jacking device applicable to an arch bridge formwork support system, and the specific operation is as follows:

[0023] Step 1: Modify the conventional top support and process the adjustment slots and bolt adjustment holes on the top support panel.

[0024] Step 2: Process and manufacture the adjustment block. First, use three steel plates of different sizes to make an adjustable support plate as shown in the attached figure; then symmetrically weld a pair of supporting load-bearing beam limit fixing columns on the panel of the adjustable support plate, and then symmetrically weld two height adjustment bolts on the lower part of the panel and respectively equip them with height adjustment nuts; make a grooved limit clamping plate and insert it into the height adjustment side plate at the rear end of the adjustable support plate, and also equip two symmetrical locking bolts.

[0025] Step 3: Insert the height adjustment side plate at the rear end of the adjustable support plate in the adjustment block into the adjustment slot of the existing modified top support, insert the two height adjustment bolts into the bolt adjustment holes respectively, and tighten the two height adjustment nuts at the bottom.

[0026] Step 4: Insert the screw rod of the device into the vertical pole of the erected scaffolding support system, and adjust it to the appropriate position using the screw adjusting wheel according to the elevation of the upper arch bridge (inclined beam, etc.).

[0027] Step 5: Calculate the height difference between the two ends of the load-bearing beam supporting the formwork in the area of ​​adjusting the length of the panel according to the curvature of the arch bridge (or the angle of the inclined beam). Adjust the two height adjustment bolts up and down according to the calculated height difference. When adjusted to the appropriate position, use two height adjustment nuts to tighten the adjustment bolts and the existing modified top support at the bottom.

[0028] Step 6: Adjust the position according to the statistical bolts, use the grooved limit card to position the height adjustment side plate at the rear end of the adjustable pallet, clip it to the upper opening of the adjustment slot of the existing modified top support, and then lock it with two locking bolts to ensure that the rear end support of the modified pallet is stable.

[0029] Step 7: Place the stress-bearing shaping beams of the formwork support system according to the design and relevant construction plans, and position the beams between their limit fixing columns to ensure that the vertical poles of the formwork support system are axially compressed.

[0030] Step 8: According to the gap between the fixed beam and the adjustable support plate, further fine-tune the screw adjustment wheel until the fixed beam and the adjustable support plate are completely fitted together. If necessary, the two height adjustment bolts and the grooved limit clamp can be adjusted synchronously. The specific steps are the same as steps 5 and 6.

[0031] (III) Beneficial effects

[0032] The present invention provides a construction method for using a jacking device in an arch bridge formwork support system. It has the following beneficial effects:

[0033] The construction method for using a jacking device in an arch bridge formwork support system has a simple structure: the jacking device of the invention adopts a modular design, has a compact structure, and is easy to install and disassemble.

[0034] Easy to adjust: By adjusting the nut, the height of the block support plate can be adjusted quickly and easily to meet the construction requirements of different curvatures (angles).

[0035] Effective limit: The limit fixing column can effectively limit and fix the position of the supporting load-bearing beam, so that the axis of the top support and its lower formwork supporting column is compressed, avoiding eccentric compression of the column, which is beneficial to the force of the support system.

[0036] Uniform force: Through the use of the adjusting block of the present invention, the adjustable support plate is fully fitted with the load-bearing beam of the formwork support system, avoiding the instability and damage of the component caused by too small a top support force surface and uneven force.

[0037] Good safety: A force-reinforced plate is provided at the rear of the adjustment block support, and its proper height can be adjusted through the limit card and firmly fixed with locking bolts, which can ensure that the device maintains stability and safety performance during operation.

[0038] Wide scope of application: The jacking device of the present invention is applicable to various arch bridge formwork support systems and has high versatility and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 :An overall and perspective view of a jacking device suitable for use in an arch bridge formwork support system

[0040] Figure 2 : Front and rear views of a jacking device suitable for use in an arch bridge formwork support system

[0041] Figure 3 : A jacking device suitable for use in an arch bridge formwork support system, the overall view and perspective view of the existing modified jacking device

[0042] Figure 4 : An overall effect diagram of the adjustment block in a jacking device suitable for use in an arch bridge formwork support system

[0043] Figure 5 : Right view of the adjustment block in a jacking device suitable for use in an arch bridge formwork support system

[0044] Among them: 1-existing modified top support; 11-screw adjustment wheel; 12-screw rod; 13-top support plate; 14-adjustment slot; 15-bolt adjustment hole; 2-adjustment block; 21-adjustable support plate; 22-support load-bearing beam limit fixing column; 23-height adjustment bolt; 24-height adjustment nut; 25-limit clamping plate; 26-locking bolt. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figure 1-5 The present invention provides a technical solution: a jacking device suitable for use in an arch bridge formwork support system, comprising two components, an existing modified jacking support and an adjustment block, wherein the existing modified jacking support comprises a screw adjustment wheel, a screw rod, a jacking support plate, an adjustment slot and a bolt adjustment hole, and the adjustment block comprises an adjustable support plate, a supporting load-bearing crossbeam limiting fixing column, a height adjustment bolt, a height adjustment nut, a limiting clamping plate and a locking bolt.

[0047] Screw adjusting wheel: It is composed of an adjusting nut with two wings, which can be adjusted up and down to make the top support close to the formwork supporting beam until it reaches the appropriate position.

[0048] Screw rod: Top support screw rod, used for top support force, the lower end is fixed in the vertical pole of the support system, and the upper end is provided with a support plate for supporting the formwork beam.

[0049] Top support plate: It is used to support and adjust the matching block in this device, and it supports the upper part together with the template support beam to transmit the load.

[0050] Adjustment slot: It is a long horizontal slot, which is convenient for adjusting the height of the rear end steel plate of the support plate in the matching block. The slot size is slightly larger than the size of the rear end steel plate, which is convenient for adjusting the up and down height of the steel plate.

[0051] Bolt adjustment holes: two symmetrical longitudinal elliptical holes, which are convenient for adjusting the adjusting bolts of the matching block up and down according to the curvature of the arch bridge, and leave a certain amount of movable space to prevent the bolt adjustment from being restricted.

[0052] Adjustment support plate: It is made of three steel plates of different sizes. The front side plate is hung down about mm to facilitate engagement with the lower top support (surface) plate. The middle is a stress-bearing surface steel plate, which is used to fit closely with the upper scaffolding support beam. The rear end uses a steel plate with a height of about (400) mm, which is inserted into the adjustment slot of the lower top support and can be moved up and down to adjust the height.

[0053] Support the load-bearing beam limit fixing column (22 arranged symmetrically at two locations): two limit devices protruding from the adjustment support plate surface, with a height of about mm, the distance between the two is slightly larger than the width of the load-bearing beam, and are connected to the adjustment support plate by welding.

[0054] Height adjustment bolts: Two symmetrically arranged screws are used to adjust the height of the pallet.

[0055] Height adjustment nuts: Two adjustment nuts, which are used to cooperate with the adjustment bolts to tighten the height of the support plate after it is adjusted into place.

[0056] Limiting card plate: It is an annular card plate structure, which is composed of four steel plates surrounding the adjusting steel plate at the rear end of the adjustable support plate. It can move up and down along the adjusting steel plate to limit the steel plate.

[0057] Locking bolt: It consists of two locking bolts. When the adjusting steel plate at the rear end of the adjustable pallet is adjusted to a suitable height, the limiting card is firmly locked by rotating the locking bolts, thereby achieving height adjustment and effective force at the rear end of the adjustable pallet.

[0058] A construction method applicable to an arch bridge formwork support system using a jacking device, comprising the above-mentioned jacking device applicable to an arch bridge formwork support system, and the specific operation is as follows:

[0059] Step 1: Modify the conventional top support and process the adjustment slots and bolt adjustment holes on the top support panel.

[0060] Step 2: Process and manufacture the adjustment block. First, use three steel plates of different sizes to make an adjustable support plate as shown in the attached figure; then symmetrically weld a pair of supporting load-bearing beam limit fixing columns on the panel of the adjustable support plate, and then symmetrically weld two height adjustment bolts on the lower part of the panel and respectively equip them with height adjustment nuts; make a grooved limit clamping plate and insert it into the height adjustment side plate at the rear end of the adjustable support plate, and also equip two symmetrical locking bolts.

[0061] Step 3: Insert the height adjustment side plate at the rear end of the adjustable support plate in the adjustment block into the adjustment slot of the existing modified top support, insert the two height adjustment bolts into the bolt adjustment holes respectively, and tighten the two height adjustment nuts at the bottom.

[0062] Step 4: Insert the screw rod of the device into the vertical pole of the erected scaffolding support system, and adjust it to the appropriate position using the screw adjusting wheel according to the elevation of the upper arch bridge (inclined beam, etc.).

[0063] Step 5: Calculate the height difference between the two ends of the load-bearing beam supporting the formwork in the area of ​​adjusting the length of the panel according to the curvature of the arch bridge (or the angle of the inclined beam). Adjust the two height adjustment bolts up and down according to the calculated height difference. When adjusted to the appropriate position, use two height adjustment nuts to tighten the adjustment bolts and the existing modified top support at the bottom.

[0064] Step 6: Adjust the position according to the statistical bolts, use the grooved limit card to position the height adjustment side plate at the rear end of the adjustable pallet, clip it to the upper opening of the adjustment slot of the existing modified top support, and then lock it with two locking bolts to ensure that the rear end support of the modified pallet is stable.

[0065] Step 7: Place the stress-bearing shaping beams of the formwork support system according to the design and relevant construction plans, and position the beams between their limit fixing columns to ensure that the vertical poles of the formwork support system are axially compressed.

[0066] Step 8: According to the gap between the fixed beam and the adjustable support plate, further fine-tune the screw adjustment wheel until the fixed beam and the adjustable support plate are completely fitted together. If necessary, the two height adjustment bolts and the grooved limit clamp can be adjusted synchronously. The specific steps are the same as steps 5 and 6.

[0067] In summary, the construction method for using a jacking device in an arch bridge formwork support system has a simple structure: the jacking device of the present invention adopts a modular design, has a compact structure, and is easy to install and disassemble.

[0068] Easy to adjust: By adjusting the nut, the height of the block support plate can be adjusted quickly and easily to meet the construction requirements of different curvatures (angles).

[0069] Effective limit: The limit fixing column can effectively limit and fix the position of the supporting load-bearing beam, so that the axis of the top support and its lower formwork supporting column is compressed, avoiding eccentric compression of the column, which is beneficial to the force of the support system.

[0070] Uniform force: Through the use of the adjusting block of the present invention, the adjustable support plate is fully fitted with the load-bearing beam of the formwork support system, avoiding the instability and damage of the component caused by too small a top support force surface and uneven force.

[0071] Good safety: A force-reinforced plate is provided at the rear of the adjustment block support, and its proper height can be adjusted through the limit card and firmly fixed with locking bolts, which can ensure that the device maintains stability and safety performance during operation.

[0072] Wide scope of application: The jacking device of the present invention is applicable to various arch bridge formwork support systems and has high versatility and practicality.

[0073] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A jacking device suitable for use in an arch bridge formwork support system, characterized in that: The invention comprises two components, namely an existing modified top support (1) and an adjustment block (2), wherein the existing modified top support (1) comprises a screw adjustment wheel (11), a screw rod (12), a top support plate (13), an adjustment notch (14) and a bolt adjustment hole (15), and the adjustment block (2) comprises an adjustable support plate (21), a support beam limit fixing column (22), a height adjustment bolt (23), a height adjustment nut (24), a limit clamping plate (25) and a locking bolt (26). Screw adjusting wheel (11): It is composed of an adjusting nut with two wings, which can be adjusted up and down to make the top support close to the template supporting beam until it reaches a proper position. Screw rod member (12): a top supporting screw rod, used for top supporting force, with the lower end fixed in the vertical rod of the supporting system and the upper end provided with a support plate for supporting the template cross beam. Top support plate (13): used in this device to support the adjustment block, and to support the upper part of the template support beam to transmit the load together with the top support plate (13). The adjusting notch (14) is a transverse long notch, which is convenient for adjusting the height of the rear end steel plate of the supporting plate (21) in the matching block. The size of the notch is slightly larger than the size of the rear end steel plate, which is convenient for adjusting the upper and lower heights of the steel plate. The bolt adjustment holes (15) are two symmetrical longitudinal elliptical holes, which are convenient for adjusting the adjustment bolts of the matching block to be adjusted up and down according to the curvature of the arch bridge, and a certain movable space is left to prevent the bolt adjustment from being restricted. The adjusting support plate (21) is made of three steel plates of different sizes. The front side plate is hung down by about (50) mm to facilitate engagement with the lower top support (surface) plate (13). The middle is a stress-bearing surface steel plate for tightly fitting with the upper scaffolding support beam. The rear end adopts a steel plate with a height of about (400) mm, which is inserted into the adjusting notch (14) of the lower top support and can be moved up and down to adjust the height. The support beam limit fixing columns (22) are symmetrically arranged at two locations: two limit devices protruding from the adjustment support plate (21), with a height of about (50) mm, the distance between the two being slightly larger than the width of the load-bearing beam, and connected to the adjustment support plate by welding. Height adjustment bolts (23): Two symmetrically arranged screw rods are used to adjust the height of the support plate (21). Height adjustment nuts (24): two adjustment nuts, which are used to cooperate with the adjustment bolts (23) to adjust the height of the support plate (21) and tighten it after it is adjusted to the right position. The limiting clamping plate (25) is an annular clamping plate structure, which is composed of four steel plates surrounding the rear end adjusting steel plate of the adjustable support plate (21), and can move up and down along the adjusting steel plate to limit the position of the steel plate. Locking bolts (26): They are composed of two locking bolts. When the adjusting steel plate at the rear end of the adjustable support plate (21) is adjusted to a suitable height, the limiting clamping plate (25) is firmly locked by rotating the locking bolts (26), thereby achieving height adjustment and effective force bearing at the rear end of the adjustable support plate (21).

2. A construction method for using a jacking device in an arch bridge formwork support system, characterized in that: The invention comprises a jacking device applicable to an arch bridge formwork support system as described in claim 1, and the specific operation is as follows: Step 1: Modify the conventional top support and process the top support panel to open an adjustment notch (14) and a bolt adjustment hole (15). Step 2: Process and manufacture the adjustment block (2). First, use three steel plates of different sizes to manufacture an adjustable support plate (21) as shown in the attached figure; then symmetrically weld a pair of supporting force-bearing crossbeam limit fixing columns (22) on the panel of the adjustable support plate (21), and then symmetrically weld two height adjustment bolts (23) at the lower part of the panel and respectively equip them with height adjustment nuts (24); manufacture a grooved limit clamping plate (25) and insert it into the height adjustment side plate at the rear end of the adjustable support plate (21), and also equip two symmetrical locking bolts (26). Step 3: Insert the height adjustment side plate at the rear end of the adjustable support plate (21) in the adjustment block (2) into the adjustment notch (14) of the existing modified top support (1), and insert two height adjustment bolts (23) into the bolt adjustment holes (15) respectively, and fasten two height adjustment nuts (24) at the bottom. Step 4: insert the screw rod (12) of the device into the vertical pole of the scaffolding support system that has been erected, and adjust it to a proper position using the screw rod adjusting wheel (11) according to the elevation of the upper arch bridge (inclined beam, etc.). Step 5: Calculate the height difference between the two ends of the template support load-bearing beam in the panel length area of ​​the adjustment block (2) according to the curvature of the arch bridge (or the angle of the inclined beam), adjust the two height adjustment bolts (23) up and down according to the calculated height difference value, and after adjusting to a suitable position, use two height adjustment nuts (24) to tighten the adjustment bolts (23) and the existing modified top support (1) at the bottom. Step 6: According to the position adjustment of the statistical bolts (23), the slotted limiting clamping plate (25) is used to position the height adjustment side plate of the rear end of the adjustable support plate (21), and is clamped to the upper opening of the adjustment notch (14) of the existing modified top support (1), and then locked with two locking bolts (26) to ensure that the rear end support of the modified support plate (1) is stable. Step 7: Place the stress-bearing beams of the formwork support system according to the design and relevant construction plans, and place the beams between their limit fixing columns (22) to ensure that the vertical poles of the formwork support system are axially compressed. Step 8: According to the gap between the shaped crossbeam and the adjustable support plate (21), the screw adjustment wheel (11) is further fine-tuned until the shaped crossbeam and the adjustable support plate (21) are completely fitted together. If necessary, the two height adjustment bolts (23) and the grooved limit clamping plate (25) can be adjusted synchronously. The specific steps are the same as steps 5 and 6.

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