A durable mobile pedestal for precast box girder construction

Abstract

The utility model discloses a durable movable pedestal of precast box girder construction, including seat, the seat inside is inlaid with a plurality of groups first I -steel and at least one group no.

Description

Technical Field

[0001] This utility model relates to the field of precast box girder construction technology, specifically a durable mobile platform for precast box girder construction. Background Technology

[0002] Most precast box girders are manufactured in precast beam yards. First, a fixed platform is poured with concrete in the beam yard. After the platform reaches the design strength, the bottom formwork is installed on the platform, the bottom slab reinforcement and web reinforcement are tied, the side formwork, inner formwork, and top formwork are installed, the top slab reinforcement is tied, concrete is poured, cured, and the prestressing tendons are tensioned to complete the precast beam segment. After being hoisted to the storage area, the next beam is precast. With the continuous development of technology, different mobile platforms have emerged in the market for the construction of precast box girders. The precast box girder, combined with the bridge erecting machine shell, is erected after the lower structure is completed. The beam seat is poured on the box girder formwork to form the precast box girder. Compared with cast-in-place beams, this accelerates the project progress and saves construction time.

[0003] Current mobile platforms for precast box girder construction suffer from uneven stress. During concrete pouring, the box girder formwork is subjected to downward pressure from the concrete, causing it to move downwards. Different parts of the box girder module experience varying stresses. Furthermore, the movement of the mobile platform along with the formwork can lead to the formwork tilting to one side, resulting in an uneven bottom with a significant slope. Additionally, the platform's durability is poor; during use, the platform may sink and tilt to one side due to varying stresses, causing the box girder formwork to also tilt. This can lead to the cast-in-place beams tipping over during platform movement, compromising their safe use. Therefore, a durable mobile platform for precast box girder construction is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a durable mobile platform for the construction of precast box girders, so as to solve the problems mentioned in the background art, such as uneven bottom and slope of the casting beam support due to different stresses on different parts of the box girder formwork, poor durability, and box girder formwork tilting to one side, causing the casting beam support to tilt to one side.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A durable mobile platform for the construction of precast box girders includes a guide rail set above the ground and a platform slidably connected to the guide rail.

[0007] The base is internally fitted with several sets of first I-beams and at least one set of No. 1 base connecting plate. The No. 1 base connecting plate is located between two adjacent sets of first I-beams, and the top of the No. 1 base connecting plate is connected to the top of the base through a No. 1 fastener, and the bottom of the base is connected to the bottom of the No. 1 base connecting plate through a No. 2 fastener.

[0008] The top surface of the platform is provided with several box girder templates arranged laterally by the second I-beam. A first slope adjuster and a first hoisting hole are provided between the adjacent box girder templates on the left side of the platform, and a second slope adjuster and a second hoisting hole are provided between the adjacent box girder templates on the right side of the platform.

[0009] The first anti-tipping mechanism and the second anti-tipping mechanism are installed on the inner two sides of the platform. Both the first anti-tipping mechanism and the second anti-tipping mechanism include a second platform connecting plate, a fixed seat installed on the second platform connecting plate, and an anti-tipping part vertically connected to the fixed seat. Adjustment parts for elastically supporting the anti-tipping part are installed on both sides of the second platform connecting plate.

[0010] Preferably, the first or second slope adjuster is used to adjust the slope of the cast beam seat on the box girder template. The first and second slope adjusters each include a base plate installed on the seat, a top plate placed horizontally on the base plate, and several sets of lifting parts arranged at intervals between the base plate and the top plate. Each set of lifting parts is used to drive the top plate to move up or down to change the inclination of the top plate in order to adjust the overall slope of the top plate.

[0011] Preferably, the lifting part is an adjusting cylinder, which is vertically mounted on the base plate, and the piston rod at the top of the adjusting cylinder is connected to the bottom of the top plate.

[0012] Preferably, the anti-tipping part has a "T" shaped cross-section and consists of an upright plate and an inclined plate installed on the upright plate. The inclined plate is attached to the bottom surface of the first I-beam, and the upright plate is vertically fixed to the fixed base by a connector using fastening bolts.

[0013] Preferably, the adjustment part comprises a first sleeve connected inside the base, an adjustment screw extending movably into the inner cavity of the first sleeve, and a second sleeve sleeved on the adjustment screw, wherein the vertical central axis of the cavities of the first sleeve and the second sleeve are on the same vertical extension line.

[0014] Preferably, a movable channel steel is installed in the first or second lifting hole, and the interior of the base is in communication with the cavity of the lifting hole. The movable channel steel can be moved inside the base, and the first or second lifting hole is used to facilitate the lifting of the casting beam seat poured on the box girder formwork.

[0015] Preferably, the platform has suspension points arranged at intervals along its length, and a traveling mechanism is installed at the bottom of the platform. The traveling mechanism consists of a hydraulic motor and traveling wheels, which are slidably connected to a guide rail.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes the elastic support force generated by the adjusting screw in the adjusting part when it moves into the first or second sleeve to support the inclined panel, preventing the inclined panel from tilting left or right during use, and consequently preventing the box girder template from tilting left or right. Furthermore, the first platform connecting plate and the second I-beam fill the interior of the platform to prevent the upper surface structure from sinking and maintain a stable state, thus keeping the box girder template stable. This improves the overall structural stability and durability of the platform, and also enhances the stability of the beam seats when placed on the moving platform. This makes the beam seats more stable when moving with the platform, significantly improving the safety of this durable mobile platform for precast box girder construction and facilitating its widespread use. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the durable mobile platform for precast box girder construction according to this utility model;

[0019] Figure 2 This is a partial enlarged structural diagram of the mounting base of the No. 1 pedestal connecting plate of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the second anti-tipping mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the adjusting part of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the second slope adjuster of this utility model;

[0023] Figure 6 This is a structural schematic diagram of the No. 1 pedestal connecting plate of this utility model.

[0024] Figure 7 This is a structural schematic diagram of the No. 2 platform connecting plate of this utility model.

[0025] In the diagram: 1. Base; 2. Base lifting point; 3. Traveling wheel; 4. Hydraulic motor; 5. Distribution box; 6. First anti-tipping mechanism; 7. First I-beam; 8. First base connecting plate; 801. First fastener; 802. Second fastener; 9. Second anti-tipping mechanism; 901. Second base connecting plate; 902. Fixed seat; 903. Connecting piece; 904. Adjustment part; 9041. First sleeve; 9042. Adjusting screw; 9043. Second sleeve; 905. Vertical plate; 906. Inclined plate; 10. Movable channel steel; 11. Second I-beam; 12. Box girder formwork; 13. First slope adjuster; 14. First lifting hole; 15. Second lifting hole; 16. Second slope adjuster; 1601. Base plate; 1602. Top plate; 1603. Adjusting cylinder; 17. Ground; 18. Guide rail. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-7 This invention provides a technical solution for a durable mobile platform for precast box girder construction, comprising a guide rail 18 positioned above ground 17 and a platform 1 slidably connected to the guide rail 18. The platform 1 contains several sets of first I-beams 7 and at least one set of first platform connecting plates 8. The first platform connecting plate 8 is located between two adjacent sets of first I-beams 7, and its top is connected to the top of the platform 1 via a first fastener 801. The bottom of the platform 1 is connected to the bottom of the first platform connecting plate 8 via a second fastener 802. The first fastener 801 and the second fastener 802 are, but are not limited to, fastening screws or bolts. Platform lifting points 2 are spaced apart along the length of the platform 1. A traveling mechanism is installed at the bottom of the platform 1, consisting of a hydraulic motor 4 and traveling wheels 3 slidably connected to the guide rail 18. A distribution box 5 is installed on one side of the platform 1 to supply power to the hydraulic motor 4. 4 is used to drive the traveling wheels 3 to move on the guide rail 18; the hydraulic motor 4 adopts the commonly used specifications on the market, and its structural principle is a well-known technology on the market, so it will not be described in detail here; several box girder templates 12 are arranged laterally on the top surface of the base 1 through the second I-beam 11. The gap between the adjacent box girder templates 12 on the left side of the base 1 is provided with a first slope adjuster 13 and a first lifting hole 14, and the gap between the adjacent box girder templates 12 on the right side of the base 1 is provided with a second slope adjuster 16 and a second lifting hole 14. Lifting hole 15; wherein, a movable channel steel 10 is installed in the first lifting hole 14 or the second lifting hole 15, and the interior of the base 1 is connected to the cavity of the lifting hole. The movable channel steel 10 can be moved into the interior of the base 1. The first lifting hole 14 or the second lifting hole 15 is used to facilitate the lifting of the casting beam seat on the box girder formwork 12. The box girder formwork 12 can be made of I-beams welded on the base 1 on site. The first lifting hole 14 or the second lifting hole 15 is a T-beam lifting hole reserved for bolt top panel.

[0028] In this embodiment, please refer to Figure 1 , Figure 3 , Figure 4 and Figure 7As shown, a first anti-tipping mechanism 6 and a second anti-tipping mechanism 9 are installed on the inner sides of the base 1. Both the first anti-tipping mechanism 6 and the second anti-tipping mechanism 9 include a second base connecting plate 901, a fixed seat 902 installed on the second base connecting plate 901, and an anti-tipping part vertically connected to the fixed seat 902. Adjustment parts 904 for elastically supporting the anti-tipping part are installed on both sides of the second base connecting plate 901. The anti-tipping part has a "T" shaped cross-section and consists of a vertical plate 905 and an inclined plate 906 installed on the vertical plate 905. The vertical plate 905 and the inclined plate 906 are integrally connected and formed. The inclined plate 906 is attached to the bottom surface of the first I-beam 7, and the vertical plate 905 is vertically fixed to the fixed seat 902 via a connector 903. 2. The connecting part 903 adopts, but is not limited to, fastening bolts; the adjusting part 904 consists of a first sleeve 9041 connected inside the base 1, an adjusting screw 9042 extending movably into the inner cavity of the first sleeve 9041, and a second sleeve 9043 sleeved on the adjusting screw 9042. The vertical central axis of the cylinder cavity of the first sleeve 9041 and the second sleeve 9043 are on the same vertical extension line. The first sleeve 9041 and the second sleeve 9043 may be made of, but are not limited to, seamless tubes. The adjusting screw 9042 adopts, but is not limited to, a T60 type screw. Among them, the second base connecting plate 901 and the first base connecting plate 8 are both made of H-shaped steel structure. The connection hole between the second base connecting plate 901 and the first base connecting plate 8 needs to be drilled in conjunction with the connecting rib.

[0029] It should be noted that the first anti-tipping mechanism 6 or the second anti-tipping mechanism 9 can prevent the box girder formwork 12 from tilting to the left or right during the concrete pouring process by using the inclined panel 906 and the adjusting part 904. When the adjusting screw 9042 in the adjusting part 904 moves into the first sleeve 9041 or the second sleeve 9043, it generates an elastic supporting force to support the inclined panel 906, so that the inclined panel 906 does not tilt to the left or right. The upper surface of the base 1 always remains stable and does not sink downward, thereby keeping the box girder formwork 12 stable. This makes the outer surface of the concrete-poured beam base flat, improving the overall structural stability and durability of the base 1. The stability of the beam base when placed on the moving platform is improved, and the beam base is more stable when moved with the moving platform, thus improving the safety of the use of this durable moving platform for precast box girder construction.

[0030] In this embodiment, please refer to Figure 1 and Figure 5As shown, the first slope adjuster 13 or the second slope adjuster 16 is used to adjust the slope of the cast beam seat on the box girder template 12. The first slope adjuster 13 and the second slope adjuster 16 both include a base plate 1601 installed on the base 1, a top plate 1602 placed horizontally on the base plate 1601, and a number of lifting parts arranged at intervals between the base plate 1601 and the top plate 1602. Each lifting part is used to drive the top plate 1602 to move up or down to change the inclination of the top plate 1602 in order to adjust the overall slope of the top plate 1602. The lifting part mentioned uses, but is not limited to, an adjusting cylinder 1603. The adjusting cylinder 1603 is vertically installed on the base plate 1601, and the cylinder piston rod at the top of the adjusting cylinder 1603 is connected to the bottom of the top plate 1602.

[0031] This durable mobile platform for precast box girder construction involves pre-laying guide rails 18 on the ground 17, then sliding the platform 1, equipped with a walking mechanism at its bottom, onto the guide rails 18. Inside the platform, a first anti-tipping mechanism 6, a second anti-tipping mechanism 9, several sets of first I-beams 7, and several sets of first platform connecting plates 8 are installed. The first I-beams 7 and first platform connecting plates 8 are fixedly installed inside the platform 1 using fasteners 801 and 802. The inclined panels 906 of the first anti-tipping mechanism 6 or the second anti-tipping mechanism 9 extend from the platform 1 and are tightly attached to the second I-beams 11. Then, the second I-beams 11, the first slope adjuster 13, and the second slope adjuster 16 are laid on the platform. At least three sets of box girder formwork 12 are laid on the second I-beams 11, and the first slope adjuster 13 or the second slope adjuster 16... The device 16 is set on the reserved gap between adjacent box girder templates 12, wherein the top plate 1602 is flush with the plate surface of the box girder template 12 to fill the reserved gap; then a panel is added on the box girder template 12 to form a beam seat cavity. After concrete is injected into the formed beam seat cavity and the concrete dries, the beam seat pouring work is completed. After the pouring work is completed, the moving platform together with the poured precast box girder can be moved and used according to the usage requirements by using the cooperation of the walking mechanism and the guide rail 18, so as to facilitate the transfer of the precast box girder; during the concrete injection process, the first slope adjuster 13 or the second slope adjuster 16 can be driven appropriately to make the concrete evenly gather on the box girder template 12, so that the upper surface of the box girder template 12 has no large slope and is more flat, thus making the bottom of the poured beam seat more flat.

[0032] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0033] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be understood that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present utility model, and these all fall within the protection scope of the present utility model. In the present utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "joining", "fixing", etc. should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. Among them, there are various ways of detachable installation, such as by plugging and snapping, or by bolt connection, etc.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precast box girder construction durable mobile pedestal, characterized in that: It includes a guide rail set above the ground and a base that is slidably connected to the guide rail; The base is internally fitted with several sets of first I-beams and at least one set of No. 1 base connecting plate. The No. 1 base connecting plate is located between two adjacent sets of first I-beams, and the top of the No. 1 base connecting plate is connected to the top of the base through a No. 1 fastener, and the bottom of the base is connected to the bottom of the No. 1 base connecting plate through a No. 2 fastener. The top surface of the platform is provided with several box girder templates arranged laterally by the second I-beam. A first slope adjuster and a first hoisting hole are provided between the adjacent box girder templates on the left side of the platform, and a second slope adjuster and a second hoisting hole are provided between the adjacent box girder templates on the right side of the platform. The first anti-tipping mechanism and the second anti-tipping mechanism are installed on the inner two sides of the platform. Both the first anti-tipping mechanism and the second anti-tipping mechanism include a second platform connecting plate, a fixed seat installed on the second platform connecting plate, and an anti-tipping part vertically connected to the fixed seat. Adjustment parts for elastically supporting the anti-tipping part are installed on both sides of the second platform connecting plate.

2. The precast box girder construction durable mobile bench according to claim 1, characterized in that: The first or second slope adjuster is used to adjust the slope of the cast beam seat on the box girder formwork. Both the first and second slope adjusters include a base plate installed on the seat, a top plate placed horizontally on the base plate, and several sets of lifting parts arranged at intervals between the base plate and the top plate. Each set of lifting parts is used to drive the top plate to move up or down to change the inclination of the top plate in order to adjust the overall slope of the top plate.

3. The precast box girder construction durable movable bench according to claim 2, characterized in that: The lifting unit uses an adjusting cylinder, which is vertically mounted on the base plate, and the piston rod at the top of the adjusting cylinder is connected to the bottom of the top plate.

4. The precast box girder construction durable mobile bench according to claim 1, characterized in that: The anti-tipping part has a "T" shaped cross-section and consists of an upright plate and an inclined plate installed on the upright plate. The inclined plate is attached to the bottom surface of the first I-beam, and the upright plate is vertically fixed to the fixed base by a connector using fastening bolts.

5. The precast box girder construction durable mobile bench according to claim 1, characterized in that: The adjustment unit consists of a first sleeve connected inside the base, an adjustment screw extending movably into the inner cavity of the first sleeve, and a second sleeve sleeved on the adjustment screw. The vertical central axes of the cavities of the first sleeve and the second sleeve are on the same vertical extension line.

6. The precast box girder construction durable mobile bench according to claim 1, characterized in that: A movable channel steel is installed in the No. 1 or No. 2 lifting hole. The interior of the base is connected to the cavity of the lifting hole. The movable channel steel can be moved inside the base. The No. 1 or No. 2 lifting hole is used to facilitate the lifting of the casting beam base poured on the box girder formwork.

7. The precast box girder construction durable mobile bench according to claim 1, characterized in that: The platform has suspension points arranged at intervals along its length. A traveling mechanism is installed at the bottom of the platform, and the traveling mechanism consists of a hydraulic motor and traveling wheels, which are slidably connected to the guide rail.

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