Supporting device based on pre-lifting steel-concrete composite beam falling system conversion

Abstract

The invention relates to a supporting device based on pre-lifting steel-concrete composite beam falling system conversion, which comprises a central cavity column, the top side of the central cavity column is connected with an upper supporting plate, and the bottom side of the central cavity column is connected with a lower supporting plate. The invention relates to the technical field of steel-concrete composite beam pre-lifting supports. According to the supporting device based on pre-lifting steel-concrete composite beam falling system conversion, a plurality of supporting devices can be rapidly stacked together, meanwhile, two adjacent supporting devices can be rapidly positioned, the using and installing efficiency, safety and stability of the multiple supporting devices are improved, and the using and installing efficiency of the multiple supporting devices is improved. Safety risks of slippage, inclination, distortion and instability of the steel box girder in the construction process are reduced, the multi-span single-width whole-connection steel box girder can be pre-lifted and supported, effective control over the bridge forming linear elevation of the steel-concrete composite girder is ensured, the purpose of applying pre-pressure to the hogging moment area of the pier top of the steel-concrete composite girder is achieved, and the construction efficiency is improved. And the effect of improving the overall construction efficiency is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pre-elevated support of steel-concrete composite beams, and in particular to a support device based on conversion of a beam-dropping system of a pre-elevated steel-concrete composite beam. Background Art

[0002] The installation of steel box girders adopts the pre-elevation construction technology supported by steel lattice column brackets. After the concrete construction of the steel box girder deck, the steel-concrete composite beam is dropped onto the permanent support to complete the conversion of the steel-concrete composite beam system. During this period, temporary support devices are generally used to support the bottom of the steel box girder to facilitate the setting of permanent supports under the steel box girder.

[0003] In the prior art, the supporting devices commonly used in the conversion of steel box beams or concrete continuous beam systems are mainly temporary sand tube (sand box) supports and temporary sulfur mortar supports. Their scope of use is limited to the pre-elevation height of the box beam close to the permanent support elevation, and the safety risk of the box beam system conversion is almost zero. Since the pre-elevation of the steel box beam installation is higher than the permanent support elevation, when the commonly used temporary sand tube (sand box) supports and temporary sulfur mortar supports are used for system conversion, the uniformity, symmetry, safety and stability of the beam drop displacement are difficult to control, which can easily cause the box beam to become unstable, twisted and deformed, the bridge line shape is difficult to meet the design elevation, and the prestressing of the negative bending moment area on the top of the box beam pier is difficult to meet the design requirements. The construction safety risk is relatively large, and the overall weight is relatively heavy, which is time-consuming and labor-intensive to use, affecting the efficiency of the conversion of the steel box beam pre-elevation beam drop system. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a support device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system, so as to solve the technical problems mentioned in the above background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A support device based on the conversion of a pre-raised steel-concrete composite beam-dropping system comprises a central cavity column, an upper support plate is connected to the top side of the central cavity column, a lower support plate is connected to the bottom side of the central cavity column, first positioning holes are opened at four corners of the top side of the upper support plate, four second positioning holes are opened at four corners of the top side of the lower support plate, positions of the first positioning holes and the second positioning holes close to each other correspond to each other, a locking piece is arranged between the first positioning hole and the second positioning hole, and a reinforcement piece is arranged on the outer peripheral side of the central cavity column.

[0007] In a preferred example, the present invention can be further configured as follows: the reinforcement member includes a number of reinforcement ribs, and the plurality of reinforcement ribs are distributed in a circular array and connected to the outer peripheral side of the central cavity column.

[0008] In a preferred example, the present invention can be further configured as follows: positioning plates are provided below two adjacent sides of the upper support plate, the positioning plates are connected to the corresponding reinforcing ribs, and connecting plates are connected to the two positioning plates by bolts.

[0009] In a preferred example, the present invention can be further configured as follows: the locking member includes a lower locking pin and an upper locking pin, the lower locking pin is arranged above the second positioning hole, the lower locking pin is rotatably connected to the lower support plate, the upper locking pin is slidably connected to the first positioning hole, the bottom end of the upper locking pin is connected to a stud, the stud is inserted into the lower locking pin and is threadedly connected to the lower locking pin.

[0010] In a preferred example, the present invention can be further configured as follows: the top end of the upper locking pin extends to the top of the upper support plate and is arranged in an arc shape, and the bottom end of the lower locking pin is provided with an inner concave arc groove corresponding to the top end of the upper locking pin.

[0011] In a preferred example, the present invention can be further configured as follows: a sprocket is embedded in the bottom of the outer peripheral side of the four lower locking pins, and the sprocket is fixedly connected to the lower locking pins, and a chain is commonly engaged on the outer peripheral sides of the four sprockets.

[0012] In summary, the present invention includes at least one of the following beneficial technical effects:

[0013] 1. The support device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system can quickly stack multiple support devices together when in use, and can also quickly position two adjacent support devices, thereby improving the efficiency and safety stability of the use and installation of multiple support devices, reducing the safety risks of slippage, tilting, twisting, and instability of steel box beams during construction, and can pre-elevate and support multi-span single-span integrated steel box beams, ensuring effective control of the linear elevation of the steel-concrete composite beam bridge, so as to achieve the purpose of applying pre-pressure to the negative bending moment area on the pier top of the steel-concrete composite beam, thereby achieving the effect of improving the overall construction efficiency.

[0014] 2. The supporting device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system has a plurality of reinforcing ribs, so that the plurality of reinforcing ribs can assist the support of the central cavity column, improve the support rigidity of the central cavity column, and the reinforcing ribs can further support the upper support plate and the lower support plate, thereby improving the stability of the upper support plate and the lower support plate when supporting;

[0015] 3. The supporting device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system, two adjacent supporting devices are connected by a connecting plate, and the two ends of the connecting plate are respectively connected to the corresponding positioning plates on the two adjacent supporting devices, so as to further improve the stability of the supporting device when in use, so that multiple supporting devices form a whole after being installed, thereby improving the stability of the steel box beam when supporting;

[0016] 4. In the support device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system, the top end of the upper locking pin is set in an arc shape, so when the upper locking pin contacts the position of the corresponding second positioning hole expansion, the arc-shaped side wall of the upper locking pin can be used to fit and rub against the expanded side wall of the second positioning hole, so that the upper locking pin can automatically find and insert into the corresponding second positioning hole, thereby improving the efficiency of the two support devices to find and position accurately, and avoiding the occurrence of angle deviations that affect the efficiency of stacking and fixing the two support devices;

[0017] 5. This support device based on the conversion of the pre-elevated steel-concrete composite beam drop system, the sprocket is fixedly connected to the bottom of the outer peripheral side of the lower locking pin, and can pull the chain to rotate, so that the chain drives the four sprockets to rotate at the same time, thereby being able to simultaneously control the up and down movement of the four upper locking pins. When two support devices are stacked, the four upper locking pins can be quickly inserted into the corresponding second positioning holes, thereby achieving the effect of rapid positioning and locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of a support device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the positioning plate of a support device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system of the present invention.

[0021] Figure 3 The present invention is a schematic diagram of a locking member structure of a support device based on the conversion of a pre-elevated steel-concrete composite beam drop beam system.

[0022] In the figure, 1, central cavity column; 2, upper support plate; 3, lower support plate; 4, first positioning hole; 5, second positioning hole; 6, locking piece; 7, reinforcement piece; 8, reinforcement rib; 9, positioning plate; 10, connecting plate; 11, lower locking pin; 12, upper locking pin; 13, stud; 14, inner concave arc groove; 15, sprocket; 16, chain. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0024] Example:

[0025] Reference Figure 1-Figure 2 The present invention discloses a support device for the conversion of a pre-elevated steel-concrete composite beam falling system, comprising a central cavity column 1, an upper support plate 2 being connected to the top side of the central cavity column 1, a lower support plate 3 being connected to the bottom side of the central cavity column 1, first positioning holes 4 being provided at four corners on the top side of the upper support plate 2, four second positioning holes 5 being provided at four corners on the top side of the lower support plate 3, positions of the first positioning holes 4 and the second positioning holes 5 which are close to each other correspond to each other, a locking piece 6 is provided between the first positioning hole 4 and the second positioning hole 5, and a reinforcing piece 7 is provided on the outer peripheral side of the central cavity column 1.

[0026] In this embodiment, reference Figure 1 , multiple support devices can be used in stacking, and multiple support devices can be quickly stacked together like stacking wood, so as to pre-raise the steel box girder. When stacking, the corresponding upper support plate 2 and lower support plate 3 are stacked together, and the first positioning hole 4 on the upper support plate 2 is aligned with the second positioning hole 5, and then fixed by bolts to avoid lateral deviation during the support work, thereby affecting the construction progress. The locking member 6 provided can directly lock the adjacent upper support plate 2 and lower support plate 3, eliminating the step of bolt fixing and improving the installation efficiency. In addition, the reinforcement member 7 provided can connect the two support devices on the same plane to each other, thereby improving the overall stability of the support device.

[0027] In a further preferred embodiment of the present invention, Figure 1 As shown, the reinforcing member 7 includes a number of reinforcing ribs 8 , and the plurality of reinforcing ribs 8 are distributed in a circular array and connected to the outer peripheral side of the central cavity column 1 .

[0028] In this embodiment, reference Figure 1 There are several reinforcing ribs 8 therein, so that several reinforcing ribs 8 can assist in supporting the central cavity column 1, improve the supporting rigidity of the central cavity column 1, and the reinforcing ribs 8 can further support the upper support plate 2 and the lower support plate 3, thereby improving the stability of the upper support plate 2 and the lower support plate 3 during support.

[0029] In a further preferred embodiment of the present invention, Figure 1-2 As shown, positioning plates 9 are provided below two adjacent sides of the upper support plate 2 , and the positioning plates 9 are connected to the corresponding reinforcing ribs 8 , and connecting plates 10 are connected to the two positioning plates 9 by bolts.

[0030] In this embodiment, reference Figure 2 The number of the positioning plates 9 is two, which are respectively arranged below the two adjacent sides of the upper support plate 2, so that when the support device is supported, the arrangement needs to form a rectangular arrangement. After the rectangular arrangement, refer to Figure 1 The connecting plate 10 is used to connect two adjacent supporting devices, and the two ends of the connecting plate 10 are respectively connected to the corresponding positioning plates 9 on the two adjacent supporting devices, so as to further improve the stability of the supporting device during use, so that multiple supporting devices can form a whole after being installed, thereby improving the stability of the steel box girder during support.

[0031] In a further preferred embodiment of the present invention, Figure 2-3 As shown, the locking member 6 includes a lower locking pin 11 and an upper locking pin 12, the lower locking pin 11 is arranged above the second positioning hole 5, the lower locking pin 11 is rotatably connected to the lower support plate 3, the upper locking pin 12 is slidably connected to the first positioning hole 4, and the bottom end of the upper locking pin 12 is connected to a stud 13, and the stud 13 is inserted into the lower locking pin 11 and threadedly connected to the lower locking pin 11.

[0032] In this embodiment, reference Figure 2 The upper locking pin 12 and the lower locking pin 11, the upper locking pin 12 is slidably connected to the corresponding first positioning hole 4, the lower locking pin 11 is rotatably connected to the lower support plate 3, and the axis is colinearly arranged with the axis of the corresponding second positioning hole 5, and the bottom of the second screw hole is expanded, so when the two supporting devices are stacked, the expansion setting of the second positioning hole 5 is utilized, so that the upper locking pin 12 can be quickly found and inserted into the second positioning hole 5, thereby achieving the effect of rapid positioning, reference Figure 3 The stud 13 is inserted into the corresponding second positioning hole 5, and then the lower locking pin 11 is rotated. The lower locking pin 11 is threadedly connected with the stud 13, thereby driving the upper locking pin 12 to slide upward and then inserted into the corresponding second positioning hole 5, thereby completing the stacking positioning of the two supporting devices to facilitate the support of the steel box girder.

[0033] In a further preferred embodiment of the present invention, Figure 3 As shown, the top end of the upper locking pin 12 extends to the top of the upper support plate 2 and is arranged in an arc shape, and the bottom end of the lower locking pin 11 is provided with an inner concave arc groove 14 corresponding to the top end of the upper locking pin 12.

[0034] In this embodiment, reference Figure 3 The upper locking pin 12 has an arc-shaped top end, so when the upper locking pin 12 contacts the expanded position of the corresponding second positioning hole 5, the arc-shaped side wall of the upper locking pin 12 can be used to fit and rub against the expanded side wall of the second positioning hole 5, so that the upper locking pin 12 can automatically find and insert into the corresponding second positioning hole 5, thereby improving the efficiency of the two supporting devices in finding and positioning, and avoiding angle deviation that affects the efficiency of stacking and fixing the two supporting devices;

[0035] The concave arc groove 14 formed at the bottom end of the lower locking pin 11 allows the upper locking pin 12 to be inserted, thereby further positioning the upper locking pin 12, and quickly knowing that the upper locking pin 12 has been inserted into the designated position, thereby improving installation efficiency.

[0036] In a further preferred embodiment of the present invention, Figure 2 As shown, a sprocket 15 is embedded in the bottom of the outer peripheral side of the four lower locking pins 11, and the sprocket 15 is fixedly connected to the lower locking pins 11, and a chain 16 is commonly meshed on the outer peripheral sides of the four sprockets 15.

[0037] In this embodiment, reference Figure 2 The sprocket 15 is fixedly connected to the bottom of the outer peripheral side of the lower locking pin 11, and can pull the chain 16 to rotate, so that the chain 16 drives the four sprockets 15 to rotate at the same time, thereby being able to control the up and down movement of the four upper locking pins 12 at the same time. When the two supporting devices are stacked, the four upper locking pins 12 can be quickly inserted into the corresponding second positioning holes 5, thereby achieving the effect of rapid positioning and locking.

[0038] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A support device based on the conversion of a pre-elevated steel-concrete composite beam drop beam system, comprising a central cavity column (1), characterized in that: The top side of the central cavity column (1) is connected to an upper support plate (2), and the bottom side of the central cavity column (1) is connected to a lower support plate (3). The four corners on the top side of the upper support plate (2) are each provided with a first positioning hole (4), and the four corners on the top side of the lower support plate (3) are provided with four second positioning holes (5). The positions of the first positioning holes (4) and the second positioning holes (5) that are adjacent to each other correspond to each other. A locking piece (6) is provided between the first positioning hole (4) and the second positioning hole (5), and a reinforcing piece (7) is provided on the outer peripheral side of the central cavity column (1).

2. A support device based on the conversion of the pre-elevated steel-concrete composite beam drop beam system according to claim 1, characterized in that: The reinforcing member (7) comprises a plurality of reinforcing ribs (8), and the plurality of reinforcing ribs (8) are distributed in a ring array and connected to the outer peripheral side of the central cavity column (1).

3. The supporting device based on the conversion of the pre-elevated steel-concrete composite beam falling beam system according to claim 2 is characterized in that: Positioning plates (9) are provided below two adjacent sides of the upper support plate (2), the positioning plates (9) are connected to the corresponding reinforcing ribs (8), and connecting plates (10) are connected to the two positioning plates (9) via bolts.

4. The supporting device based on the conversion of the pre-elevated steel-concrete composite beam falling beam system according to claim 3 is characterized in that: The locking member (6) comprises a lower locking pin (11) and an upper locking pin (12), wherein the lower locking pin (11) is arranged above the second positioning hole (5), the lower locking pin (11) is rotatably connected to the lower support plate (3), the upper locking pin (12) is slidably connected to the first positioning hole (4), and the bottom end of the upper locking pin (12) is connected to a stud (13), and the stud (13) is inserted into the lower locking pin (11) and is threadedly connected to the lower locking pin (11).

5. The supporting device based on the conversion of the pre-elevated steel-concrete composite beam falling beam system according to claim 4 is characterized in that: The top end of the upper locking pin (12) extends to the top of the upper support plate (2) and is arranged in an arc shape, and the bottom end of the lower locking pin (11) is provided with an inner concave arc groove (14) corresponding to the top end of the upper locking pin (12).

6. The supporting device based on the conversion of the pre-elevated steel-concrete composite beam falling beam system according to claim 5 is characterized in that: A sprocket (15) is embedded in the bottom of the outer peripheral side of the four lower locking pins (11), and the sprocket (15) is fixedly connected to the lower locking pin (11), and a chain (16) is commonly meshed on the outer peripheral sides of the four sprockets (15).

Images