CN104179123A - Bridge fabrication machine capable of building and assembling two bridge segments - Google Patents

Abstract

A two-hole segmental assembly bridge-building machine, which belongs to the technical field of bridge construction, is characterized in that: the main girder of the bridge-building machine adopts two sets of parallel two full-span main trusses and a short-section tail truss, and the lower part of the main truss is set Joy beam system, under the truss, a supporting wheel system is supported on the pier of the bridge span to be built, and above the truss, there is a girder lifting crane running along the longitudinal direction of the truss. The beneficial effect is: the box girder section is prefabricated in the girder yard next to the bridge site, the girder transport vehicle transports the girder section to the tail of the bridge building machine, the girder crane lifts the girder section into place, pours concrete wet joints, and stretches the prestressed tendons to form Bridge, the bridge-building method of the bridge-building machine passing through the hole. It has the characteristics of bearing large loads, building two-hole bridges at the same time through one hole, saving construction period, and reducing construction costs.

Description

A two-hole segmental assembly bridge-building machine

technical field

The invention belongs to the technical field of bridge construction. the

Background technique

At present, the segmental box girder assembly bridge building machines at home and abroad are usually composed of a working span and front (rear) guide beams. Box girder segments are placed on the working span, concrete wet joints are poured, and prestressed tendons are stretched to complete. Fabrication of a one-hole bridge. This type of bridge building machine can make bridges with large spans and heavy girders, and is widely used in bridge construction with spans of more than 40m. However, this type of bridge building machine can only assemble and construct a bridge with one hole at a time, and then the bridge building machine moves forward through the hole to carry out the assembling operation of the segmental box girder in the next hole. The bridge task takes more than ten days on average, and the cost is relatively high. the

Contents of the invention

The object of the present invention is to provide a bridge-building machine for segmental assembly with two holes, which can simultaneously complete the bridge-building work of the two-hole box girder after the hole is put in place once. the

The technical solution of the present invention is: it is composed of main beam 1, lower joist system 2, front fulcrum supporting wheel system 3, middle fulcrum supporting wheel system 4, front outrigger 5, rear fulcrum beam 6, beam lifting crane 7 and other parts. the

The main girder 1 of the bridge-building machine adopts two sets of parallel two full-span main trusses 11 and a short section tail truss 12; the lower part of the main truss is provided with a joist system 2; On the pier; above the truss is provided with a girder lifting crane 7 running longitudinally along the truss. the

The main girder truss is a two-piece structure, which is composed of truss chords, oblique rods, vertical rods and connecting systems; the main girder truss is a two-span continuous beam type when passing through the hole. The connecting pin 13 of the upper chord at the joint, and the main girder truss of the bridge building machine form two independent simply supported beams. The two groups of trusses are connected at the front end of the front span, the front end of the rear span, and the rear end of the rear span through the front outrigger beam 51, the middle beam 8, and the rear fulcrum beam 6, respectively. the

The main truss 12 is provided with a front fulcrum support wheel system 3 at the lower part of the front end of the front span 121, and a middle fulcrum support wheel system 4 at the lower part of the connection between the front and rear spans. Rolling support; after the hole is put in place, the front and middle fulcrum support wheels are converted into front and middle fulcrums to bear the weight of the box girder segment and wet joints during bridge construction; the front fulcrum can be moved backward along the main truss to adapt to different spans bridge building needs. The rear fulcrum beam 6 at the rear end of the rear span 122 of the main truss 12 is supported on the end of the built box girder as the heavy-duty rear fulcrum of the bridge building machine. The rear fulcrum can move forward along the main truss to adapt to the needs of bridge building with different spans. The front end of the main truss is provided with a front outrigger 5 for assisting the passage of the bridge building machine. the

The lower joist system 2 is composed of vertical and horizontal beams. The lower joist beam 21 is a split type, and the middle is connected by bolts and steel pins. The two ends of the beam are respectively connected with the main trusses on both sides. , the beam can be turned up along both sides to avoid the pier; the lower joist longitudinal beam 22 is arranged along the direction of the main truss, and the two ends are connected with the beam 21, and a screw or hydraulic jacking device 23 is provided on the longitudinal beam to adjust the line shape of the box girder. the

The beam lifting crane 7 is a gantry crane, which can run longitudinally along the running track above the two-span main truss 12 and the tail truss 11, so as to realize the functions of lifting the beam section from the beam transport vehicle 9 and placing the beam section on the belly of the bridge building machine. the

The beneficial effects of the present invention are as follows: the box girder section is prefabricated in the girder field next to the bridge site, the girder section is transported by the girder truck to the tail of the bridge building machine, the girder section is hoisted by the girder crane, and the concrete wet joint is poured. Stress tendons form a bridge, and the bridge-building machine passes through the bridge-building method. It has the characteristics of bearing large loads, building two-hole bridges at the same time through one hole, saving construction period, and reducing construction costs. the

Description of drawings

Figure 1 is a schematic diagram of the elevation of the bridge building machine;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 1;

Fig. 4 is the C-C sectional view of Fig. 1;

Fig. 5 is a D-D sectional view of Fig. 1;

Figure 6 is a schematic diagram of the elevation of the main beam truss;

Figure 7A is a front view of the bottom joist system;

Figure 7B is a top view of the lower joist system;

Figure 7C is a side view of the bottom joist system;

Fig. 8 A, B, C, D, E, F, G, H, I, J are the schematic diagrams of the bridge building machine and the drilling operation program.

Detailed ways

Example 1

The present invention will be further described below in conjunction with accompanying drawing:

As shown in Figures 1, 2, 3, 4, and 5, 1 is the main beam, 2 is the lower joist system, 3 is the front fulcrum supporting wheel system, 4 is the middle fulcrum supporting wheel system, 5 is the front outrigger, 6 is Rear fulcrum crossbeam, 7 are beam lifting cranes, 8 are intermediate crossbeams, 9 are beam transport vehicles, and 51 is a front outrigger crossbeam.

As shown in Figure 6, 11 is the main truss, 12 is the puppet tail truss, and 13 is the steel pin of the main truss upper chord. the

As shown in Figure 7, 21 is a lower joist beam, 22 is a lower joist longitudinal beam, and 23 is a leading screw or a hydraulic jacking device. the

It consists of main girder 1, lower joist system 2, front fulcrum supporting wheel system 3, middle fulcrum supporting wheel system 4, front outrigger 5, rear fulcrum beam 6, beam lifting crane 7 and other parts. The main girder 1 of the bridge-building machine adopts two sets of parallel two full-span main trusses 11 and a short section tail truss 12; the lower part of the main truss is provided with a joist system 2; On the pier; above the truss is provided with a girder lifting crane 7 running longitudinally along the truss. the

The main girder truss is a two-piece structure, which is composed of truss chords, oblique rods, vertical rods and connecting systems; the main girder truss is a two-span continuous beam when passing through the hole. The connecting pin 13 of the upper chord at the connection, the main girder truss of the bridge building machine forms two independent simply supported beams. The two groups of trusses are connected at the front end of the front span, the front end of the rear span, and the rear end of the rear span through the front outrigger beam 51, the middle beam 8, and the rear fulcrum beam 6, respectively. the

The main truss 12 is provided with a front fulcrum support wheel system 3 at the lower part of the front end of the front span 121, and a middle fulcrum support wheel system 4 at the lower part of the connection between the front and rear spans. Rolling support; after the hole is put in place, the front and middle fulcrum support wheels are converted into front and middle fulcrums to bear the weight of the box girder segment and wet joints during bridge construction; the front fulcrum can be moved backward along the main truss to adapt to different spans bridge building needs. The rear fulcrum beam 6 at the rear end of the rear span 122 of the main truss 12 is supported on the end of the built box girder as the heavy-duty rear fulcrum of the bridge building machine. The rear fulcrum can move forward along the main truss to adapt to the needs of bridge building with different spans. The front end of the main truss is provided with a front outrigger 5 for assisting the passage of the bridge building machine. the

The lower joist system 2 is composed of vertical and horizontal beams. The lower joist beam 21 is a split type, and the middle is connected by bolts and steel pins. The two ends of the beam are respectively connected with the main trusses on both sides. , the beam can be turned up along both sides to avoid the pier; the lower joist longitudinal beam 22 is arranged along the direction of the main truss, and the two ends are connected with the beam 21, and a screw or hydraulic jacking device 23 is provided on the longitudinal beam to adjust the line shape of the box girder. the

The beam lifting crane 7 is a gantry crane, which can run longitudinally along the running track above the two-span main truss 12 and the tail truss 11, so as to realize the functions of lifting the beam section from the beam transport vehicle 9 and placing the beam section on the belly of the bridge building machine. the

The construction method of the segmental assembly bridge building machine with two holes connected in series of the present invention is as follows:

A. After the bridge-building machine passes through the holes in place, the bridge-building support of the front, middle and rear fulcrums is completed (the front and middle supporting wheel systems are formed as supports), the lower joist system is closed, and the upper chord steel pin of the main truss is pulled out to make the front and rear The two-hole main truss forms a simple-supported beam with two independent holes, which prevents the deformation of the main truss from affecting the linear control of the bridge with adjacent holes.

B. The prefabricated box girder segment is transported by the bridge deck girder truck to the bottom of the girder crane at the truss at the end of the main girder. The girder crane lifts the girder section to the front span, and lifts the girder section in the order from front to back. Place it on the bottom joist. the

C. After the front hole beam section is hoisted, follow-up work such as alignment adjustment, wet joint concrete pouring, prestressed tensioning, etc. is carried out, and at the same time, the rear hole beam section continues to be hoisted. the

D. After the beam section of the rear hole is hoisted, follow-up work such as alignment adjustment, pouring of wet joint concrete, and prestressed tensioning is carried out. the

E. After the two-hole beam is completed, the hole preparation is started: restore the rolling bearing function of the supporting wheel system (withdraw the components forming the support), insert the upper chord steel pin of the main truss to form a two-hole continuous main beam, and open the lower joist system (The opened lower joist is shown in the side view), and the cross beam is installed on the beam truck and connected with the tail truss of the main beam. the

F. The suspension of the beam transport vehicle is slightly raised to make the rear fulcrum leave the bridge deck, and the beam transport vehicle moves forward slowly to push the whole machine through the hole. the

G. After moving forward for 40m, move the beam lifting crane to the tail of the bridge building machine as a counterweight to ensure the overturning stability and the vertical pressure required by the beam transport vehicle when continuing to pass through the hole. the

H. Continue to move forward for 24m, the front end of the main girder reaches the front pier, lay the front outriggers, use the beam lifting crane to hoist the rear supporting wheel system to the top of the front pier and install it in place, and complete the first hole through operation. the

I. Carry out the second hole via the hole procedure of the first hole. the

J. After the completion of the second hole, close the lower joist system, make preparations for bridge construction, and start the construction of the next two holes. the

1. Main beam: The main beam 1 includes two sets of parallel truss structures, and each set of truss structures is composed of two full-span main trusses 11 and a short section tail truss 12 as a whole; each set of trusses is a two-piece structure, consisting of Chords, inclined bars, vertical bars and connecting systems are assembled; the main girder truss is a two-span continuous beam type when passing through the hole. The machine main girder truss forms two independent simply supported beams. The two groups of trusses are connected at the front end of the front span, the front end of the rear span, and the rear end of the rear span respectively through the front outrigger beam 51, the middle beam 8, and the rear pivot beam 6 to form a stable spatial structure. the

2. Bottom joist: Bottom joist system 2 is composed of vertical and horizontal beams. The bottom joist beam 21 is a split type, and the middle is connected by bolts and steel pins. The two ends of the beam are connected with the main truss on both sides. , disassemble the connection in the middle of the crossbeam, the crossbeam can be turned up along both sides to avoid the bridge pier, the overturning action of the crossbeam is realized by the hydraulic system; A bar or a hydraulic jacking device 23 is used to adjust the line shape of the box girder. the

3. Supporting system: The bridge building machine adopts two sets of supporting systems in the bridge-building state and the passing-through state. In the bridge-building state, the bridge-building machine is supported on the pier in front of the front span by the front fulcrum (converted from the front fulcrum supporting wheel system 3), and supported on the rear of the front span by the middle fulcrum (converted from the middle fulcrum supporting wheel system 4). The bridge pier is supported on the top surface of the built box girder behind the rear span by the rear fulcrum beam 6; in the state of passing through the hole, the front, middle and rear points of the bridge building machine respectively pass through the front fulcrum support wheel system, 3 middle fulcrum support wheel system 4 and The beam carrier is supported by the crossbeam through the hole. During the passage, the bridge building machine needs to be temporarily supported on the front pier by means of the front outrigger 5 every time it moves forward for a full span, and then the last supporting wheel system is moved forward to the front pier. the

4. Lifting beam crane: The beam lifting crane is composed of gantry structure, cart running system, lifting system, electrical control system and other parts, and is used for hoisting of box girder segments. Among them, the mast structure is mainly composed of the main beam, the end beam, the upright legs and the lower beam; The running adopts a single-rail form, driven by a frequency conversion motor, and the impact of starting and braking is small; the lifting system is composed of two hoists, a fixed pulley block, a movable pulley block and a spreader. the

5. Hole passing method: After the two-hole bridge is built, restore the rolling support function of the supporting wheel system, insert the upper chord steel pin 13 of the main truss to form a continuous main beam with two holes, open the lower joist system 2, and install the over-girder on the beam transport vehicle 9 The hole beam is connected with the tail truss 11 of the main beam; the suspension of the beam transporter 9 is slightly raised to make the rear fulcrum leave the bridge deck, and the beam transporter 9 moves forward slowly to push the whole machine through the hole; after moving forward for 40m, the beam lifting crane 7 is moved to The tail of the bridge building machine is used as a counterweight to ensure the overturning stability and the vertical pressure required by the beam truck when continuing to pass the hole; continue to move forward for 24m, the front end of the main girder reaches the front pier, lay the front outrigger 5, and use the girder to lift the bridge Machine 7 lifts the rear supporting wheel system to the top of the front pier and installs it in place to complete the first hole passing operation; carry out the second hole passing according to the first hole passing procedure; after the second hole passing is completed, close the lower Joist system 2, do a good job in bridge construction preparations, and start to build bridges with two holes. the

Claims (5)

1. a Kong Lian does section assembling bridge manufacturing machine, it is characterized in that: bridge fabrication machine girder adopt two groups parallel two whole across main couple and a pipe nipple afterbody truss, joist system is set in main couple bottom, it is to be bearing in to treat on bridging bridge pier that support roller is established in truss below, and truss top is provided with along the longitudinal traveling bale handle of truss loop wheel machine.

2. a kind of two Kong Lian as claimed in claim 1 do section assembling bridge manufacturing machine, it is characterized in that: girder truss is two-piece type structure, by chord member of truss, brace, montant and connection structure spelling group, formed, bridge fabrication machine girder truss forms two across simply supported beam independently, between two groups of truss front across front end, after across front end, after across rear end, by front leg strut crossbeam, intermediate transverse girder, rear fulcrum crossbeam, be connected respectively.

3. a kind of two Kong Lian as claimed in claim 1 do section assembling bridge manufacturing machine, it is characterized in that: main couple is established front fulcrum support roller system front across front end bottom, central bearing point support roller system is established in bottom, mid-span place, front and back, and support roller system is bearing in and treats on bridging bridge pier, for the traveling of via hole bridge fabrication machine provides rolling bearing; After via hole puts in place, before front, central bearing point support roller system converts to, central bearing point, the weight of box girder segment and wet seam while bearing bridging; Front fulcrum can move after main couple, and the rear fulcrum beam supporting across rear end after main couple is being made case beam end, and as the heavily loaded rear fulcrum of bridge fabrication machine, rear fulcrum moves forward along main couple, and main couple front end is established front leg strut, for auxiliary bridge fabrication machine via hole.

4. a kind of two Kong Lian as claimed in claim 1 do section assembling bridge manufacturing machine, it is characterized in that: subiculum girder system system is connected to form by beam in length and breadth, lower joist crossbeam is split type, centre links into an integrated entity by bolt, steel pin, crossbeam two ends are connected with both sides main truss respectively, during via hole, disassemble crossbeam middle part and connect, crossbeam is dug and is dodged bridge pier along both sides; Lower joist longeron is along main truss direction layout, and two ends are connected with crossbeam, establish leading screw or hydraulic jacking device on longeron, linear in order to regulating box beam.

5. a kind of two Kong Lian as claimed in claim 1 do section assembling bridge manufacturing machine, it is characterized in that: bale handle loop wheel machine is portal crane, along the two longitudinal travelings of walking rails across main truss and afterbody truss top, realize the function that hoisting beam saved and put at bridge fabrication machine belly beam joint from Beam transportation vehicle.