CN116837727A

CN116837727A - Cast-in-situ box girder limb protection structure

Info

Publication number: CN116837727A
Application number: CN202310655508.4A
Authority: CN
Inventors: 陈远; 厚兴平; 胡燕立; 陈凯; 韩凤友; 叶宏辉
Original assignee: China First Metallurgical Group Co Ltd
Current assignee: China First Metallurgical Group Co Ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-10-03
Anticipated expiration: 2043-06-02
Also published as: CN116837727B

Abstract

The invention relates to a cast-in-situ box girder limb protection structure, which is arranged at one end of a cast-in-situ box girder flange plate bearing girder and comprises an isolation guard rail arranged at the end part of the bearing girder and support units arranged at the inner side of the isolation guard rail and connected with the bearing girder, wherein a springboard which can be stepped on by an operator is paved on two adjacent support units, the support height of the support structure can be adjusted, and the springboard is in a horizontal state by adjusting the support height of the support structure; according to the invention, the supporting structure is arranged on the bearing main beam, the supporting height of the adjacent passageway can be adjusted, the height of the holding plate at the lower part of the U-shaped frame at the lower part of the supporting unit can be adjusted, the cast-in-situ box beam is suitable for cast-in-situ box beams with different sizes, so that the levelness of the springboard on the adjacent passageway is high, and the stepping of operators is safe and firm; the isolation guard rail is arranged on the outer side of the collar edge passageway with the adjustable built inclination angle, so that the intensity of the edge protection structure can be increased while the operator is prevented from falling.

Description

Cast-in-situ box girder limb protection structure

Technical Field

The invention relates to the field of cast-in-situ box girder construction, in particular to a cast-in-situ box girder edge protection structure.

Background

The cast-in-situ box girder bridge has the advantages of light structure, small height, large span and adaptation to small-radius curves, and is widely applied to road administration projects such as high-speed ramps and urban overpasses. At present, in the construction of a cast-in-situ box girder, a row of brackets are generally erected on the periphery of a main body full frame, a pedestrian passageway is seldom arranged at the top of the cast-in-situ box girder, an operator walks along a flange plate bottom die, so that the pollution, deformation and even damage of a template can be caused, and the forming of the box girder can be influenced; the flange plate bottom die has a certain gradient, and safety risks exist when operators tread on the bottom die.

The Chinese patent document CN112813847A discloses a cast-in-situ box girder edge protection structure and a construction method, the cast-in-situ box girder edge protection structure comprises a spandrel girder and cantilever templates, wherein the cantilever templates are positioned on two sides of the spandrel girder, a plurality of vertical support rods and inclined support rods are arranged between the cantilever templates and the spandrel girder, a guardrail structure is arranged on the cantilever templates, the guardrail structure comprises a flange template connected with the cantilever templates, a plurality of railings are arranged on the flange template, and a connecting square is arranged on each of the railings. The structure fully utilizes the cantilever structural support as a bearing structure of the guardrail, combines with cast-in-situ box girder construction, combines the guardrail protection structure with cast-in-situ box girder integral construction, and integrates the guardrail protection structure and the cast-in-situ box girder integral construction. And the cantilever is only used for supporting the guardrail structure on the top surface of the cast-in-situ box girder. The guardrail is mutually offset through self structure after being impacted, and has no influence of horizontal force on the lower support, so that the safety is better. The structure still does not solve the problem that an operator does not have a special passage on the cast-in-situ box girder.

Disclosure of Invention

The invention aims to provide an adjacent edge protection structure of a cast-in-situ box girder, wherein isolation guardrails are erected on the outer sides of bearing main beams of flange plates of the cast-in-situ box girder, and an inclination angle adjustable support structure is arranged between the isolation guardrails and the flange plates to control the support height of an adjacent edge passageway so as to solve the problem that the inclination angle of the existing adjacent edge passageway is not horizontal. In order to achieve the above purpose, the specific technical scheme provided by the invention is as follows:

the utility model provides a cast-in-place case roof beam limb protection structure, sets up the bearing girder one end below cast-in-place case roof beam flange board, including setting up the isolation rail guard at bearing girder tip, setting up the supporting element that is connected with the bearing girder in isolation rail guard inboard, two adjacent supporting elements are laid on having laid the springboard that can supply the operating personnel to trample, the supporting height of supporting element is adjustable, through adjusting the supporting height of supporting element, in order to adjust the springboard is in the horizontality.

Further, the supporting unit includes a clamping frame and a supporting plate mounted on the clamping frame through a height adjusting assembly; the clamping frame comprises a U-shaped frame and a clamping plate, wherein the U-shaped frame consists of a cross rod at the bottom and upright posts positioned at two ends of the cross rod; the clamping plates are arranged on the two upright posts, the clamping plates and the U-shaped frame below the clamping plates form a clamping space for clamping and fixing the bearing main beam, and the support plate is paved with the springboards which can be stepped on by operators.

Further, the middle upper part of the upright posts is provided with a threaded rod, and the two upright posts above the clamping plate are respectively provided with a first nut, and the clamping height of the clamping plate is adjusted through the first nuts.

Further, the supporting plate is sleeved on the upper parts of the two upright posts, and the height adjusting component is a second nut which is arranged on the two upright posts at the bottom of the supporting plate in a threaded fit manner; the height of the supporting plate on each supporting unit is adjusted by screwing the second nut.

Further, the support plate and the diving board are fixed to each other.

Further, the isolation guardrail comprises a vertical rod and an inclined stay rod, and the upper ends of the vertical rod and the inclined stay rod are mutually fixed by a first rotary fastener.

Further, the lower ends of the vertical rods and the inclined stay bars are fixed with the bearing main beam through connecting pieces.

Further, the connecting piece is sleeved on the bearing main beam, bolt fixing holes are formed in the bearing main beam, a plurality of fixing holes corresponding to the bolt fixing holes are formed in the connecting piece, and the fixing bolts penetrate through the connecting piece and the bearing main beam and fix the connecting piece and the bearing main beam.

Further, the upper end of the connecting piece is provided with a fixing rod, and the fixing rod and the vertical rod or the inclined stay rod are mutually fixed through a second rotary fastener.

Further, a guard rail is arranged between two adjacent vertical rods.

The beneficial effects of the scheme are that; the support units and the isolation protective guard are sequentially arranged on the flange plate bearing main beams of the cast-in-situ box girder from inside to outside, the inclination angles of the support units can be adjusted, the springboards for the operators to tread are arranged on the support units, the springboards are spliced to form the edge corridor with adjustable inclination angles, the inclination angles of the flange plates of the cast-in-situ box girders of different types are different, the inclination angles and the sizes of the bearing main beams are different, and the working procedures for building the edge corridor are complicated; the supporting units with adjustable inclination angles are arranged on the bearing main beams, the supporting heights of the adjacent-edge passages can be adjusted, the heights of the holding plates at the lower parts of the U-shaped frames at the lower parts of the supporting units are adjustable, and the cast-in-situ box beams are suitable for cast-in-situ box beams of different types.

In addition, be provided with the isolation rail guard in the adjustable collar limit passageway outside of inclination of putting up, the isolation rail guard forms one in the face limit passageway outside and encloses the fender, can avoid the operating personnel to fall, has also increased the structural strength in face limit passageway simultaneously.

Drawings

FIG. 1 is a schematic view of the main bolster and support unit mounting structure of the present invention;

FIG. 2 is a schematic view of the mounting structure of the clamping frame, clamping plate, supporting plate, first nut and second nut of the present invention;

FIG. 3 is a schematic view of the mounting structure of the support unit, diving board and load-bearing main beam of the present invention;

FIG. 4 is a schematic diagram of an explosion structure of the connection isolation guard rail of the present invention;

FIG. 5 is a schematic view of the cast-in-situ box girder edge protection structure of the present invention mounted on a box girder;

in the drawings, the list of components represented by the various numbers is as follows:

1-a bearing main beam; 10-through holes; 2-isolating guard rails; 20-connecting piece; 201-a fixed rod; 21-standing bars; 22-diagonal braces; 23-a first rotational fastener; 24-a second rotational fastener; 25-fixing bolts; 3-a supporting unit; 30-clamping the frame; 301-U-shaped frame; 302-clamping plate; 31-a support plate; 32-stand columns; 33-a first nut; 34-a second nut; 4-springboard.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In order to better explain the purposes, structure and function of the present invention, a casting beam edge protection structure of the present invention is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the cast-in-situ box girder edge protection structure is arranged on one side of a cast-in-situ box girder flange plate bearing girder 1, an isolation guard rail 2 is arranged on the outer side of the bearing girder 1, at least two support units 3 are fixedly arranged on the bearing girder 1 close to the guard rail 2, a springboard 4 for an operator to tread is laid on the support units 3, the springboard 4 can be controlled to be in a horizontal state by adjusting the support height of the support units 3, the condition that the springboard 4 is directly erected on the bearing girder 1 is avoided, the levelness of the springboard 4 can be ensured, and the operator is more stable and safe when stepping on the springboard 4.

In the prior art, the bearing main beam 1 obliquely extends out of the flange plate of the cast-in-situ box beam, when the springboard 4 is directly paved on the bearing main beam 1, the springboard 4 integrally can also be in a state that one side close to the box beam is lower than one side far away from the box beam, the springboard 4 is in an inclined state, and an operator is unstable when stepping on the springboard 4. In view of the above problems, the support unit 3 of the present invention includes a holding frame 30 and a support plate 31 mounted on the holding frame by a height adjusting assembly with reference to fig. 2 and 3; the clamping frame 30 comprises a U-shaped frame 301 and a clamping plate 302, wherein the U-shaped frame 301 consists of a cross bar at the bottom and upright posts 32 positioned at two ends of the cross bar; the clamping plates 302 are mounted on the two upright posts 32, and the clamping plates 302 and the U-shaped frame 301 below the clamping plates form a clamping space for clamping and fixing the bearing main beam 1.

In some embodiments, the upper middle part of the upright posts 32 is a threaded rod, and the first nuts 33 are arranged on the two upright posts 32 above the clamping plate 302, and the height of the clamping plate 302 is adjusted through the first nuts 33, so that the size of the clamping space is adjusted to adapt to the bearing main beams 1 with different sizes.

In some embodiments, the supporting plate 31 is sleeved on the upper parts of the two upright posts 32, and the height adjusting component is a second nut 34 which is installed on the two upright posts at the bottom of the supporting plate 31 through screw thread fit; the height of the supporting plate 31 on each supporting unit 3 is adjusted by screwing the second nuts 34, thereby adjusting the heights of both ends of the diving board 4, so that the diving board 4 is kept horizontal, and the construction of workers is facilitated.

The adjusting structure that adjusting piece and pole setting combine can be clamp and protruding complex adjusting structure etc. except for the adjusting structure that the screw nut combined, as long as can realize can adjust bearing structure's levelness.

In some embodiments, as shown in fig. 3 and fig. 5, the isolation fence 2 comprises a vertical rod 21 and an inclined stay 22, the vertical rod 21 and the upper end of the inclined stay 22 are mutually fixed by a first rotary fastener 23, the lower ends of the vertical rod 21 and the inclined stay 22 are fixed with the bearing main beam 1 through a connecting piece 20, and a transverse railing is fixedly connected between two adjacent vertical rods 21, so that a safety fence can be provided for an adjacent-edge aisle formed by assembling the gangboards 4, and the falling of operators is avoided.

The cast-in-situ box girder edge protection structure disclosed by the invention has the following use process: referring to fig. 1, 2 and 3, a plurality of groups of through holes 10 are formed in the outer side of the main bearing beam 1, 2 connecting pieces 20 are sleeved at proper positions of the end parts of the main bearing beam 1 and then fixed by bolts, vertical rods 21 and diagonal bracing rods 22 are fixed with fixing rods 201 at the upper parts of the connecting pieces 20 by second rotary fasteners 24, and then the upper ends of the vertical rods 21 and the diagonal bracing rods 22 are mutually fixed by first rotary fasteners 23; 2 clamping frames 30 are sleeved on the bearing main beams 1 on the inner sides of the vertical rods 21, and the first nuts 33 can adjust the distance between the clamping plates 302 and the U-shaped frames 301 and can be suitable for the bearing main beams 1 with different types; and a second nut 34 and a supporting plate 31 are sleeved on the upper part of the upright post 32 from bottom to top in sequence, and the height of the supporting plate 31 on each supporting unit 3 is adjusted by screwing the second nut 34 so as to ensure the level of the supporting plate 31.

The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A cast-in-place box girder edge protection structure, which is arranged at one end of the load-bearing main beam (1) below the cast-in-place box girder flange plate, and includes an isolation guardrail (2) arranged at the end of the load-bearing main beam (1), and The support unit (3) connected to the load-bearing main beam (1) on the inside of the isolation guardrail (2) is characterized in that two adjacent support units (3) are laid with springboards (4) for workers to step on. ), the support height of the support unit (3) is adjustable. By adjusting the support height of the support unit (3), the springboard (4) can be adjusted to be in a horizontal state.

2. The cast-in-place box beam edge protection structure according to claim 1, characterized in that the support unit (3) includes a clamping frame (30) and a height adjustment assembly installed on the clamping frame (30) The support plate (31) on the top; the clamping frame (30) includes a U-shaped frame (301) and a clamping plate (302). The U-shaped frame (301) consists of a horizontal bar at the bottom and uprights (301) located at both ends of the horizontal bar. 32) consists of; the clamping plate (302) is installed on the two columns (32), and the clamping plate (302) and the U-shaped frame (301) below form a clamping device for clamping and fixing the load-bearing main beam (1). In the space, a springboard (4) for workers to step on is laid on the support plate (31).

3. The cast-in-place box beam edge protection structure according to claim 2, characterized in that the upper middle part of the upright column (32) is a threaded rod, and the two upright columns (32) above the clamping plate (302) First nuts (33) are provided on both sides, and the clamping height of the clamping plate (302) is adjusted through the first nuts (33).

4. The cast-in-place box beam edge protection structure according to claim 3, characterized in that the support plate (31) is sleeved on the upper part of the two columns (32), and the height adjustment component is installed through threaded fit. Second nuts (34) on the two uprights (32) at the bottom of the support plate (31); adjust the height of the support plate (31) on each support unit (3) by twisting the second nuts.

5. The cast-in-place box beam edge protection structure according to claim 4, characterized in that the support plate (31) and the springboard (4) are fixed to each other.

6. The cast-in-place box beam edge protection structure according to claim 1, characterized in that the isolation guardrail (2) includes a vertical pole (21) and an oblique brace (22), and the vertical pole (21) ) and the upper ends of the diagonal struts (22) are fixed to each other with the first rotating fastener (23).

7. The cast-in-place box beam edge protection structure according to claim 6, characterized in that the lower ends of the vertical poles (21) and diagonal braces (22) are connected to the load-bearing main body through connectors (20). Beam (1) is fixed.

8. The cast-in-place box beam edge protection structure according to claim 7, characterized in that it also includes fixing bolts (25), and the connector (20) is sleeved on the load-bearing main beam (1). The load-bearing main beam (1) is provided with bolt fixing holes, and the connector (20) is provided with several fixing holes corresponding to the bolt fixing holes. The fixing bolts (25) penetrate the connection. The component (20) and the load-bearing main beam (1) are then fixed together.

9. The cast-in-place box beam edge protection structure according to claim 8, characterized in that a fixed rod (201) is provided at the upper end of the connecting piece (20), and the fixed rod (201) and the vertical rod (21) or the diagonal struts (22) are fixed to each other through the second rotating fastener (24).

10. The cast-in-place box beam edge protection structure according to any one of claims 6 to 9, characterized in that a protective fence is provided between two adjacent vertical poles (21).