CN212611899U - A bailey bridge frame structure for cast-in-place construction of frame bridge - Google Patents
A bailey bridge frame structure for cast-in-place construction of frame bridge Download PDFInfo
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- CN212611899U CN212611899U CN202021056323.XU CN202021056323U CN212611899U CN 212611899 U CN212611899 U CN 212611899U CN 202021056323 U CN202021056323 U CN 202021056323U CN 212611899 U CN212611899 U CN 212611899U
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Abstract
The utility model discloses a bailey bridge frame structure for the cast-in-place construction of a machine frame bridge, which relates to the field of frame bridges, and adopts a structure that a bailey beam and a bowl buckle support are erected above a pier top (elevation 181.8 m) for the machine frame bridge at the top of a flood discharge gate, so that other processes from the elevation (164.50 m) of a bottom plate of the gate pier to the space range of the top of the gate pier can be synchronously constructed, the problem of time conflict between the gate embedded part installation, secondary concrete pouring, working gate installation and other processes in the same lower space range as the cast-in-place process of the machine frame bridge is solved, and the construction progress can be greatly accelerated; moreover, the steel pipe column Bailey beam is erected from the top of the flood discharge gate pier, so that the material and personnel investment is reduced, and the cost is reduced; meanwhile, the Bailey pieces are large in number, small in number, strong in integrity and high in safety and reliability.
Description
Technical Field
The utility model relates to a frame bridge technical field specifically is a bailey bridge frame structure for cast-in-place construction of frame bridge.
Background
In the bank reservoir danger eliminating and reinforcing engineering, a cast-in-place machine frame bridge is positioned at the upper part of a flood discharge gate of a main building of the engineering, but the existing cast-in-place machine frame bridge supporting structure is a conventional bowl buckle type scaffold supporting structure, the supporting structure is difficult to ensure the construction progress and quality for cast-in-place machine frame bridges with large span, high height and heavy weight, and the supporting structure needs to span the whole gate chamber from a bottom plate of the gate pier to the bottom of the cast-in-place machine frame bridge supporting template during the construction process, so that the conflict of working procedures such as space bottom rails below the top of the gate pier, side rail golden knot embedded parts installation, secondary concrete pouring, golden knot gate installation and the like in the construction time is caused, and the conflict is the key influencing the whole construction period, therefore, the bailey bridge frame structure for cast-in-place of the machine frame bridge on the top of the flood discharge gate is provided, the bailey bridge frame bridge structure of erecting bailey beam and bowl buckle support is adopted and arranged above the pier top (, therefore, other processes within the range from the height (164.50 m) of the bottom plate of the gate pier to the head space of the gate pier can be synchronously constructed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a bailey bridge frame structure for cast-in-place construction of machine frame bridge to solve the problem that provides among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a bailey bridge frame structure for cast-in-place construction of frame bridge, includes bailey beam and the steel-pipe column that is used for the support, bailey beam is located the framed bent side of the concrete of gate pier top, just bailey beam includes a plurality of bailey pieces, bailey beam top is provided with a plurality of I-beams, bailey beam with be provided with between the I-beam and be used for connecting staple bolt between them, the I-beam top is provided with the support, the support includes a plurality of support steel pipes and the steel pipe connecting piece that is used for the linking bridge steel pipe.
As a further aspect of the present invention: the support steel pipe is made of ¢ 48 steel, and the steel pipe connecting piece is made of bowl-buckled steel.
As a further aspect of the present invention: the staple bolt is ¢ 10mm steel work of "U" type.
As a further aspect of the present invention: the steel pipe column is a D56 seamless steel pipe.
As a further aspect of the present invention: the I-shaped steel is a steel part with the specification of 14# b.
As a further aspect of the present invention: the Bailey sheet is a reinforced steel part of 1.05m multiplied by 0.9m multiplied by 3m, and the surface of the Bailey sheet is provided with a galvanized anti-corrosion layer.
Compared with the prior art, the beneficial effects of the utility model are that:
the frame bridge on the top of the flood discharge gate is of a structure that a Bailey beam and a bowl buckle support are erected above the top of the gate (the elevation is 181.8 m), so that other procedures from the elevation (164.50 m) of a bottom plate of the gate pier to the space of the top of the gate pier can be synchronously constructed, the problem of time conflict between the frame bridge cast-in-place procedure and the procedures of gate embedded part installation, secondary concrete pouring, working gate installation and the like in the lower space range is solved, and the construction progress can be greatly accelerated; moreover, the steel pipe column Bailey beam is erected from the top of the flood discharge gate pier, so that the material and personnel investment is reduced, and the cost is reduced; meanwhile, the Bailey pieces are large in number, small in number, strong in integrity and high in safety and reliability.
Drawings
Fig. 1 is the utility model discloses a plane structure sketch map of bailey bridge frame structure for cast-in-place construction of frame bridge.
Fig. 2 is the utility model discloses a horizontal cross section structure sketch map of bailey bridge frame structure for cast-in-place construction of frame bridge.
Fig. 3 is the utility model discloses a vertical section structure sketch map of bailey bridge frame structure for cast-in-place construction of frame bridge.
In the figure: 1-gate pier, 2-steel pipe column, 3-bailey beam, 4-I-steel, 5-bent frame and 6-bracket.
Detailed Description
In the following description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-3, the embodiment provides a bailey bridge truss structure for cast-in-place construction of an airframe bridge, which includes a bailey beam 3 and a steel pipe column 2 for supporting, the bailey beam 3 is located on the side of a concrete bent frame 5 above a gate pier 1, the bailey beam 3 includes a plurality of bailey pieces, a plurality of i-beams 4 are arranged above the bailey beam 3, a hoop for connecting the bailey beam 3 and the i-beams 4 is arranged between the bailey beam 3 and the i-beams 4, a bracket 6 is arranged above the i-beams 4, and the bracket 6 includes a plurality of bracket steel pipes and a steel pipe connecting piece for connecting the bracket steel pipes. And pouring a cast-in-place machine bridge above the support 6 by taking the Bailey beam 3 and the support 6 as a foundation support.
Specifically, the support steel pipe is made of ¢ 48 steel, and the steel pipe connecting piece is made of bowl-buckled steel.
Specifically, the staple bolt is ¢ 10mm steelwork of "U" type.
Specifically, the steel pipe column 2 is a D56 seamless steel pipe.
Specifically, the i-beam 4 is a steel part with the specification of 14# b.
Specifically, the Bailey sheet is a reinforced steel product with the thickness of 1.05m multiplied by 0.9m multiplied by 3m, and the surface of the Bailey sheet is provided with a galvanized anti-corrosion layer.
The working principle of the embodiment is as follows:
in the bank reservoir danger eliminating and reinforcing project, a cast-in-place machine bridge is positioned at the upper part of a flood gate of a main building of the project: according to the 8-degree rechecking requirement of earthquake-resistant design intensity, a C35 reinforced concrete integral frame type structure is arranged on a flood gate pier, 10 holes are formed in the flood gate pier, a rack bridge on the upper portion of each hole gate is fixedly connected with a bent frame, a single hole is connected in series, an integral cast-in-place construction mode is adopted, the height of the bottom of the gate pier is 164.5m, the height of the bottom of the bent frame is 17.3m, the height of the bottom of the bent frame is 181.80m, the height of the top of the rack bridge is 189.10m, the integral body is in a double-Pi-shaped section type, four main beams are 1.5m high, 0.75m wide, 1.0m high and 0.5m wide, two secondary beams are arranged between the main beams, and.
How to solve the problem of time conflict between the frame bridge cast-in-place procedure and the procedures of gate embedded part installation, secondary concrete pouring, working gate installation and the like in the lower space range is the key of influencing the whole construction period in the frame bridge cast-in-place scheme; comprehensively considering, the machine frame bridge with 10 holes at the top of the flood spillway gate adopts a structure of building a Bailey beam and a bowl buckle support at the top of a pier (with the elevation of 181.8 meters), the elevation (164.50 m) of a bottom plate of the gate pier is synchronous to the space range of the top of the gate pier to carry out other process construction, and after the investigation and the comprehensive analysis of pipes and Bailey bridges, the utility model selects the steel pipe column Bailey bridge as the support structure of the cast-in-place machine bridge of the flood spillway gate; according to the relevant regulations of road and bridge construction calculation handbook on load combination calculation, safety factors are calculated and considered respectively through the newly poured reinforced concrete dead weight, the template and support dead weight, the walking transportation or stacking loads of constructors, material tools and the like, the loads generated during concrete vibrating, the loads generated during concrete pouring, the bowl mouth frame dead weight, the I-steel dead weight, the Bailey support loads and the like in the load combination requirements, and the load combination is 322.4KN/m when the support longitudinal beam strength is checked and calculated; according to load distribution and actual conditions, calculating according to the maximum span L =15 m and a simply supported beam, wherein the midspan bending moment is 9067.5KN/m, and the load is 2418 KN; on the basis of load combination calculation, according to a multipurpose use manual of an assembled highway steel bridge, the allowable bending moment and the shearing force of the single-row single-layer reinforced Bailey sheet are 1687KN/m and 490KN respectively, the bending reduction coefficient of the Bailey sheet is 0.9 in consideration of Bailey pin clearance and unbalance loading influence, and the load is calculated to be safe. The calculated maximum deflection is 20.42mm, and the standard deflection is 37.5mm, so the deflection calculation is safe.
Example 2
On the basis of the embodiment 1, in the embodiment, the length of the steel pipe column 2 of the spillway gate or river gate cast-in-place frame bridge bailey bridge frame structure is determined according to the lowest elevation of the top of the gate pier 1 and the elevation of the bottom of the bent frame column, the installed foundation meets the strength, and after the installation, whether the stability and the firmness of the steel pipe column 2 meet the requirements of a design drawing or not is checked so as to avoid overturning in the use process; before installation, the Bailey pieces are firstly spliced into the Bailey beam 3 with the length of 15m on the level ground, then the Bailey beam 3 is hoisted to the gate pier 1 and the steel pipe column 2 through a crane, the adjustment and transportation process requires stable and uniform speed, and after the Bailey beam 3 is hoisted to a specified position, the Bailey beam 3 is connected to form a whole; the bailey beams 3 are integrally installed with the I-beams 4, the I-beams are uniformly arranged at intervals of 0.6m, and the arrangement intervals and stability of the I-beams 4 are checked after installation to ensure uniform stress; after the I-shaped steel 4 is installed in place, the I-shaped steel 4 is connected with the Bailey beam 3 by using a U-shaped hoop, and the connection firmness of the U-shaped hoop is checked after installation to prevent loosening and falling; and then, constructing a bracket steel pipe and a bowl buckle type connecting piece, constructing a conventional bowl buckle type steel pipe bracket, supporting the steel pipe bracket on 14# b I-shaped steel, performing a bracket 6 pre-pressing test after the installation is finished, checking the strength and stability of the bracket 6 and the Bailey beam 3, measuring the elastic deformation, the inelastic deformation and the settlement deformation of the Bailey beam 3 of the whole bracket 6, and guiding the subsequent construction of a cast-in-place machine bridging bracket.
The utility model discloses a prepressing test method of bailey bridge frame structure, adopt the manual work to adorn sand bag segmentation prepressing to carry out the precompression, arrange the special messenger in the construction preparation and adorn the abrasive band equilibrium and go up the platform balance and weigh, convert out required sand bag quantity according to the result of load calculation and carry out the segmentation prepressing, the prepressing adopts crane hoist and mount, the mode of artifical pile-up, before adding sand bag prepressing, measure the elevation of each measurement and control point, measurement and control point arranges one row according to the direction of bridge plate every 5m, every row 2 points, 12 points in total, arrange the special messenger to measure the measurement and control point elevation after sand bag loading to total load 60%, 80% and 100%, hold the load 24 hours and measure these two time points each control point elevation according to the requirement when loading to 100%, through recheck measurement and control data, each point elevation average variation of loading to 100% and holding the load 24 hours is 0.5cm, satisfy load recheck scope requirement, in the preloading unloading process, unloading is carried out in a grading and loading reverse sequence, namely the sequence of 20%, 40% and 100%, and elevation measurement and control are carried out on control points at various time points.
It should be particularly noted that, although the present specification describes embodiments, each embodiment does not include only an independent technical solution, and such description of the specification is only for clarity, and those skilled in the art should take the specification as a whole, and technical solutions in various embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art, and the above-mentioned embodiments only express the preferred embodiments of the technical solutions, and the description thereof is more specific and detailed, but should not be construed as limiting the scope of the claims of the technical solutions. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications, improvements and substitutions can be made, which all fall within the protection scope of the present technical solution.
Claims (6)
1. The utility model provides a bailey bridge frame structure for cast-in-place construction of frame bridge, includes bailey beam (3) and steel-pipe column (2) that are used for the support, bailey beam (3) are located framed bent (5) side of the concrete of gate pier (1) top, just bailey beam (3) include a plurality of bailey pieces, bailey beam (3) top is provided with a plurality of I-steel (4), bailey beam (3) with be provided with between I-steel (4) and be used for connecting staple bolt between them, I-steel (4) top is provided with support (6), support (6) include a plurality of support steel pipes and the steel pipe connection spare that is used for the linking bridge steel pipe.
2. The Bailey bridge truss structure for cast-in-place construction of the frame bridge as claimed in claim 1, wherein the support steel pipe is made of ¢ 48 steel, and the steel pipe connecting piece is made of bowl-buckled steel.
3. The Bailey bridge truss structure for cast-in-place construction of the frame bridge as claimed in claim 2, wherein the hoop is a U-shaped ¢ 10mm steel member.
4. The Bailey bridge truss structure for cast-in-place construction of the frame bridge as claimed in claim 1, wherein the steel pipe column (2) is a D56 seamless steel pipe.
5. The Bailey bridge construction for cast-in-place construction of the machine-bridged bridge according to claim 4, wherein the I-steel (4) is a 14# b steel member.
6. The Bailey bridge construction for cast-in-place construction of the machine bridge girder of claim 3, wherein the Bailey pieces are 1.05m x 0.9m x 3m reinforced steel members, and the surfaces thereof are provided with galvanized anti-corrosion layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021056323.XU CN212611899U (en) | 2020-06-10 | 2020-06-10 | A bailey bridge frame structure for cast-in-place construction of frame bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021056323.XU CN212611899U (en) | 2020-06-10 | 2020-06-10 | A bailey bridge frame structure for cast-in-place construction of frame bridge |
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| Publication Number | Publication Date |
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| CN212611899U true CN212611899U (en) | 2021-02-26 |
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| CN202021056323.XU Active CN212611899U (en) | 2020-06-10 | 2020-06-10 | A bailey bridge frame structure for cast-in-place construction of frame bridge |
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