Design and construction device for through type net-shaped inhaul cable long-span arch bridge

Abstract

The utility model discloses a through netlike inhaul cable large-span arch bridge design and construction device which comprises a bridge floor, arch ribs and air cylinders, the arch ribs are arranged on the bridge floor in a bilateral symmetry mode, straining beams are correspondingly arranged on the left side and the right side of the bridge floor, a plurality of inhaul cables are arranged between the straining beams and the arch ribs, the inhaul cables are crossed to form a netlike structure, and the air cylinders are detachably arranged on the tops of the straining beams. The driving end of the air cylinder is connected with the bottom of the inhaul cable which is telescopic through the air cylinder. A plurality of air cylinders are installed at the top end of the straining beam, the air cylinders are connected with the tail ends of the inhaul cables to stretch out and draw back the inhaul cables, the inhaul cables stretch out and draw back to adjust pulling force between the arch rib and the straining beam, a better stable structure is achieved, and installation is convenient and fast. The fixed seat of the cylinder is detachably combined, so that the maintenance, assembly and disassembly are convenient, and daily maintenance is convenient; end cross beams are arranged at the front end and the rear end of the bridge floor, cross-shaped cross beams and longitudinal beams are arranged in the middle, and orthogonal special-shaped plates are poured, so that the bridge floor is stable and does not need to be supported by bridge piers; the device is novel in structure, high in practicability and suitable for popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to arch bridge construction device technical field more particularly, it is a kind of design and construction device of through netted cable large-span arch bridge. BACKGROUND

[0002] Netted arch bridge adopts netted cable, and the following advantages are obtained by using netted cable: 1, the netted structure formed by cable in plane changes the elastic buckling instability mode of netted plane, and the in-plane stability is better than that of tied arch bridge using vertical cable, and the out-of-plane stability can be ensured by selecting appropriate transverse wind brace structure.2, since the structure is designed with strength control, the structure can use high-performance materials, thereby reducing the cross-sectional size of the main arch ring and main beam of the netted arch bridge, which is beneficial to the aesthetics and economy of the arch bridge.3, the netted structure is the best structure for transferring the load of the main beam to the main arch ring, and under the same load, the axial force of the main arch ring is almost the same, but the bending moment of the main arch ring and the main beam under the netted cable system is greatly reduced, so that the main arch ring and the main beam are basically in axial compression and tension state under the action of dead load, and the stress is uniform, and the structural design difficulty is small.4, the netted arch bridge has large overall stiffness, and is suitable for overall hoisting, pushing, field support assembly and other construction methods, which is beneficial to reducing the construction difficulty.However, in the actual process, there is a certain difficulty in the installation of cable, since the netted cable is different from the vertical cable, angle adjustment and length adjustment are required, therefore, during construction, the slow adjustment efficiency often affects the construction progress, therefore, we propose a design and construction device for through netted cable large-span arch bridge, which is provided with a device at the bottom of the netted cable, and the device can adjust the angle and length of the netted cable, which is convenient for workers to construct and improves the construction progress.

[0003] In order to better reduce the construction difficulty, facilitate worker operation and improve construction progress, Chinese patent (authorized publication number: CN109024227A) discloses a high-stress-amplitude netted cable tied arch system, which comprises arch rib, netted cable system and main beam, the netted cable system adopts high-stress-amplitude cable to form a netted structure, and damping cable clamps are used at the intersection of the cable; the cable is anchored outside the structure on the arch rib, and anchor plate anchoring structure is used on the main beam, and the beam end is tensioned outside the structure. The invention can adapt to the characteristics of large live load stress amplitude of cable, avoid collision between intersecting cables; the anchoring end of the cable on the arch is placed outside the structure, so that the anchoring structure does not become the control condition of the size of the arch rib, and the netted cable tied arch bridge arch rib is adapted to the characteristics of thinning.

[0004] The scheme still has some deficiencies in application, since the number of the netted cables across the bridge is large, and each cable needs to be adjusted in angle and length according to the construction design, each cable needs to be adjusted in actual construction, the process is more complicated and the construction time is long, which is not conducive to completing the construction period on schedule, therefore, the structure of the netted cable construction device needs to be improved, so that the cable can be adjusted quickly and efficiently, the construction efficiency is effectively improved, and the construction period is shortened. Utility model content

[0005] The utility model discloses a through netted cable long-span arch bridge design and construction device, and its main purpose is to overcome the above -mentioned insufficient and the short of prior art:

[0006] The utility model adopts the technical scheme as follows:

[0007] A through netted cable long-span arch bridge design and construction device, including deck, arch rib and a plurality of air cylinders, the arch rib is symmetrically arranged to the deck, and the deck is provided with a tie beam on the left and right sides, a plurality of cables are arranged between the tie beam and the arch rib, the cables are crossed and form a net structure, a plurality of air cylinders are detachably arranged on the top of the tie beam, the driving end of the air cylinder is connected with the bottom of the cable, and the cable can be telescopic through the air cylinder.

[0008] Further, a plurality of wind braces are arranged between the arch ribs.

[0009] Further, vertical staggered cross beams and longitudinal beams are arranged between the tie beams, end cross beams are arranged at the front and rear ends, and orthogonal special-shaped plates are cast between the cross beams and the longitudinal beams.

[0010] Further, a plurality of arch rib lifting lugs are arranged at the bottom of the arch rib, the lifting lug is provided with left and right side perforations, the top of the cable is provided with a U-shaped connecting block, the connecting block is provided with a fixed connecting bolt, the connecting block is sleeved on the arch rib lifting lug and fixed through the connecting bolt and the perforation, and the cable can rotate along the arch rib lifting lug.

[0011] Further, the air cylinder is provided with a fixed seat, the upper part of the fixed seat is in an inclined structure, and a cavity body is arranged in the middle, the air cylinder is arranged in the cavity body, and the driving end is arranged in an upper inclined manner.

[0012] Further, the fixed seat comprises a left half seat and a right half seat, a connecting part is arranged between the left half seat and the right half seat, the connecting part is fixed through bolts, and fixed bolts are arranged on one side of the left half seat and the right half seat.

[0013] As known from the above description of the utility model, compared with the prior art, the utility model has the advantages that:

[0014] The utility model discloses a first through tie beam top end installation several air cylinders, through the drive end of air cylinder and the last end of inhaul cable connection to pull inhaul cable telescopic, and inhaul cable telescopic adjustment the tension between arch rib and tie beam, reach better stable structure, and convenient installation, and the difficulty of installation reduces, and it is convenient for worker operation, then, the fixed base of air cylinder adopts left half seat and has half seat detachable combination, and it is convenient for the overhaul and dismounting of air cylinder, and it is convenient for worker to the routine maintenance of arch bridge, compared with the connecting structure of existing fixed structure, and maintenance and overhaul are more convenient and efficient, finally, the front and rear ends of bridge deck are equipped with end crossbeam and are equipped with several " X " cross crossbeam and longitudinal beam and then cast orthogonal special-shaped plate, and the bridge deck is stable, does not need pier support, can effectively reduce the project cost, speeds up construction period, the utility model discloses novel structure, and the design is ingenious, and the practicality is strong, is fit for promoting. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the structure schematic diagram of the utility model.

[0016] Fig. 2 It is the side view structure schematic diagram of the utility model.

[0017] Fig. 3 It is the side view structure schematic diagram of the utility model inhaul cable and air cylinder.

[0018] Fig. 4 It is the overhead structure schematic diagram of the utility model air cylinder and fixed base. DETAILED DESCRIPTION

[0019] The specific implementation of the utility model will be further explained below with reference to the drawings.

[0020] As Figs. 1 to 4 Shown, a kind of lower bearing type netted inhaul cable large-span arch bridge design and construction device, including bridge deck 1, arch rib 2 and several air cylinders 3, the arch rib 2 is symmetrically set to the bridge deck 1, the bridge deck 1 left and right sides are correspondingly equipped with tie beam 4, which is installed between the tie beam 4 and the arch rib 2 several inhaul cables 5, which is crossed in a net-like structure, several air cylinders 3 are detachably installed on the top of the tie beam 4, the drive end of the air cylinder 3 is connected to the bottom of the inhaul cable 5, and the inhaul cable 5 is telescopic through the air cylinder 3.

[0021] Further, several wind braces 6 are provided between the arch ribs 2.

[0022] Further, the tie beams 4 are provided with vertically staggered crossbeams 7 and longitudinal beams 8, and end crossbeams 9 are provided at the front and rear ends, and orthogonal special-shaped plates 10 are cast between the crossbeams 7 and the longitudinal beams 8.

[0023] Further, the bottom of the arch rib 2 is provided with a plurality of arch rib lifting lugs 11, the lifting lug 11 is provided with left and right side perforations (not marked in the schematic view due to the angle of view), the top of the cable 5 is provided with a "U"-shaped connecting block 12, the connecting block 12 is provided with a fixed connecting bolt 13, the connecting block 12 is sleeved on the arch rib lifting lug 11 and fixed by the connecting bolt 13 penetrating the perforation, and the cable 5 can rotate along the arch rib lifting lug 11.

[0024] Further, the cylinder 3 is provided with a fixing seat 31, the upper portion of the fixing seat 31 is in an inclined structure and is provided with a cavity 32 in the middle, the cylinder 3 is arranged in the cavity 32 and the driving end is arranged in an upward inclined manner.

[0025] Further, the fixing seat 31 comprises a left half seat 311 and a right half seat 312, and a connecting portion 33 is arranged between the left half seat 311 and the right half seat 312, the connecting portion 33 is fixed by bolts, and the left half seat 311 and the right half seat 312 are provided with fixing bolts 34 on one side.

[0026] [Embodiment]

[0027] Firstly, after the bridge deck 1 and the arch rib 2 are constructed, the "U"-shaped connecting block 12 at the top of the cable 5 is sleeved on the arch rib lifting lug 11 at the bottom of the arch rib 2 and fixed by the connecting bolt 13, the cable 5 can be adjusted in angle along the arch rib lifting lug 11, then the left half seat 311 and the right half seat 312 of the fixing seat 31 are fixed by bolts, at this time, the cylinder is arranged in the cavity 32, the left half seat 311 and the right half seat 312 are fixed to the tie beam 4 by the fixing bolts 34, the inclination angle of the fixing seat 31 and the cylinder 3 is adjusted, at the same time, the driving end of the cylinder 3 is connected and fixed to the bottom end of the cable 5, the cable 5 is adjusted in extension and contraction by the cylinder 3 to adjust the tension coefficient, the connection between the arch rib 2 and the tie beam 4 is fixed, the installation of each cylinder 3 and cable 5 is sequentially operated, which is quite fast, finally, when the cylinder 3 needs to be maintained and replaced after the arch bridge is used for a long time, the left half seat 311 and the right half seat 312 are separated, and the cylinder 3 can be overhauled.

[0028] From the above description of the utility model, compared with the prior art, the utility model has the advantages that:

[0029] The utility model discloses a first through tie beam top end installation several air cylinders, through the drive end of air cylinder and the last end of cable connection to cable telescopic, cable telescopic adjustment arch rib and the tension between tie beam, reach better stable structure, and install convenient, reduce the difficulty of installation, be convenient for worker operation, then, the fixed base of air cylinder adopts left half seat and has half seat detachable combination, be convenient for the overhaul and unloading of air cylinder, the daily maintenance of arch bridge is convenient for worker, compared with the connecting structure of the fixed structure of prior art, maintenance and overhaul are more convenient and efficient, finally, the bridge deck front and rear end are equipped with end crossbeam and are equipped with several " ten " cross crossbeam and stringer and then cast orthogonal special-shaped plate, and the bridge deck is stable, does not need pier support, can effectively reduce the project cost, speeds up the construction period, the utility model discloses novel structure, clever design, strong practicality, is fit for promotion.

[0030] The above is only the specific implementation manner of the utility model, but the design concept of the utility model is not limited to this, and any non-essential improvement of the utility model by using the concept should belong to the act of infringing the protection scope of the utility model.

Claims

1. A design and construction device for a long-span arch bridge with under-deck cable-stayed structure, characterized in that: The bridge includes a bridge deck, arch ribs, and several cylinders. The arch ribs are symmetrically arranged on the bridge deck. Tie beams are provided on the left and right sides of the bridge deck. Several cables are installed between the tie beams and the arch ribs. The cables intersect in a mesh structure. Several cylinders are detachably installed on the top of the tie beams. The driving end of the cylinder is connected to the bottom of the cable. The cable can be extended and retracted through the cylinder.

2. The design and construction device for a long-span arch bridge with a bottom-bearing mesh cable as described in claim 1, characterized in that: Several wind braces are provided between the arch ribs.

3. The design and construction device for a long-span arch bridge with a bottom-bearing mesh cable as described in claim 1, characterized in that: The tie beams are provided with vertically intersecting horizontal and vertical beams, and end beams are provided at the front and rear ends. Orthogonal irregular plates are cast between the horizontal beams and the vertical beams.

4. The design and construction device for a long-span arch bridge with under-deck cable-stayed structure according to claim 1, characterized in that: The bottom of the arch rib is provided with several arch rib lifting lugs, each with a through hole on the left and right sides. The top of the cable is provided with a "U"-shaped connecting block, which is equipped with a fixing bolt. The connecting block is fitted onto the arch rib lifting lug and fixed by passing the bolt through the through hole. The cable can rotate along the arch rib lifting lug.

5. The design and construction device for a long-span arch bridge with a bottom-bearing mesh cable as described in claim 1, characterized in that: The cylinder is provided with a fixed seat, the upper part of which has an inclined structure and a cavity in the middle. The cylinder is disposed in the cavity and the driving end is inclined upward.

6. The design and construction device for a long-span arch bridge with a bottom-bearing mesh cable as described in claim 5, characterized in that: The fixing base includes a left half and a right half, and a connecting part is provided between the left half and the right half. The connecting part is fixed by bolts, and a fixing bolt is provided on one side of the left half and the right half.

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