CN108203934A - Based on the whole segment lifting erection crane of the traversing cable-stayed bridge composite beam of unbalance loading - Google Patents

Abstract

The invention discloses a bridge deck crane for hoisting and erecting the entire section of a composite girder of a cable-stayed bridge based on eccentric load lateral movement. Segmental girders and tower areas have been assembled. The beam section bridge deck is equipped with beam transport vehicles and bridge deck tire frames; the entire segment bridge deck crane includes beams, crown blocks, longitudinal beams, front outriggers and rear outriggers; the tower area has been assembled The bridge deck of the beam section bridge is also provided with a first stay cable support, which is connected to the top of the tower area through the first stay cable; the section beam includes a section beam beam, a section beam Longitudinal beams and second stay cable supports; there are two section beam longitudinal beams, and three section beam cross beams are arranged between the two section beam longitudinal beams; the second stay cable support is located on the section beam longitudinal beam Middle part; the present invention not only ensures the safety and quality of construction, but also improves the efficiency of construction and reduces construction cost.

Description

Deck crane for whole segment hoisting of composite girder of cable-stayed bridge based on eccentric load lateral movement

technical field

The invention relates to a bridge deck crane, more specifically, it is a bridge deck crane for hoisting the entire segment of a composite girder of a cable-stayed bridge based on eccentric load lateral movement.

Background technique

The traditional cable-stayed bridge composite girder installation process is as follows:

1. The full-slewing bridge deck crane is suitable for the installation process of composite beam steel beam parts. The installation steps are as follows:

Step 1: Transport the steel girder components to the working area of the main tower hoisting station;

Step 2 Use the lifting station to lift the components to the bridge deck beam transportation equipment, and transfer them to the operating range of the slewing crane;

Step 3 Use the slewing crane to install the main girder, cross girder and small longitudinal girder on the side of the composite girder in sequence;

Step 4 initially tensions the stay cables, installs the bridge deck, and secondly tensions the stay cables;

Step 5 The slewing crane is moved forward, positioned, anchored, and the installation of the next beam section begins.

Its advantages: mature technology, strong versatility of equipment;

Its disadvantages: many high-altitude operations in construction, difficult quality and safety control, and poor economic benefits.

2. Cable crane, which is suitable for the installation process of the entire segment of the composite beam steel beam. The installation steps are as follows:

Step 1: Transport the steel beam components to the working area of the main tower hoisting equipment;

Step 2: use hoisting equipment to lift and assemble the steel girder components in the bridge deck range as segmental girders;

Step 3: Use cable cranes to lift and install segmental beams in sequence;

Advantages: The process is relatively mature, and the equipment can be used in part.

Disadvantages: The assembly of temporary equipment is heavy, the cost is high, and the economic benefit is poor.

How to make a breakthrough on the basis of the above-mentioned mature technology, which can not only ensure safety and quality, but also improve construction efficiency and reduce construction cost, is an important subject that needs to be studied, explored and solved at present, and it is also the significance of the present invention.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the above-mentioned background technology, and provide a bridge deck crane for hoisting the whole segment of the composite girder of a cable-stayed bridge based on eccentric load lateral movement.

In order to achieve the above object, the technical solution of the present invention is: a bridge deck crane for hoisting the entire segment of the composite girder of a cable-stayed bridge based on eccentric load lateral movement, which is characterized in that it includes the tower area, the bridge deck of the assembled beam section in the tower area, The entire section of the bridge deck crane and the segmental beam, the bridge deck of the assembled beam section in the tower area is located at the lower part of the tower area, and the bridge deck of the assembled beam section in the tower area is equipped with a beam transport vehicle and a hoisting equipment assembly section The bridge deck tire frame temporarily installed during the section of the beam, and the ends of the bridge deck of the assembled beam section in the tower area are equipped with first longitudinal beam bolts; the whole section deck crane is installed on the assembled beam section bridge Above both ends of the deck, the entire section of the bridge deck crane includes a beam, a crane, a longitudinal beam, a front leg and a rear leg; the crane is installed on the beam; the longitudinal beam is located at both ends of the beam, and the beam is driven by The wheel structure is installed on the longitudinal beam; one end of the front outrigger is connected to the middle of the longitudinal beam, and the other end is fixed on the bridge deck of the assembled beam section in the tower area; one end of the rear outrigger is connected to the side of the longitudinal beam near the tower area One end is connected, and the other end is fixed on the bridge deck of the assembled beam section in the tower area where the longitudinal girder is close to the bottom of the tower area; the deck of the assembled beam section bridge deck in the tower area is also provided with a first stay cable support, and A stay cable support is located between the front outrigger and the rear outrigger, and the first stay cable support is connected to the top of the tower area through the first stay cable;

The segmental beam includes a segmental beam crossbeam, a segmental beam longitudinal beam and a second stay cable support; there are two segmental beam longitudinal beams, and three segmental beams are arranged between the two segmental beam longitudinal beams Crossbeam; the second stay cable bracket is located in the middle of the longitudinal beam of the segmental beam; the segmental beam has an assembly station, a beam feeding station and a rotary station;

At the assembly station, the segmental beam beam and the segmental beam longitudinal beam are assembled into a segmental beam on the bridge deck tire frame by lifting equipment;

In the beam feeding station, the segment beam is located on the beam transport vehicle, and the beam transport vehicle transports the segment beam to the working range of the bridge deck crane of the entire segment;

At the rotary station, the segmental beam is located above the end of the bridge deck of the assembled beam section in the tower area, and the segmental beam is rotated 90° by the whole segmental deck crane.

In the above technical solution, when the whole segment bridge deck crane is at the rotary station, it first moves sideways with an unbalanced load, and then rotates the segment beam by 90°.

In the above technical solution, one end of the section beam longitudinal beam is provided with a first drop beam, and the other end is provided with a second longitudinal beam bolt; after the section beam longitudinal beam completes the rotation, the section beam longitudinal beam is provided with a first One end of the drop beam is close to the bridge deck of the assembled beam section.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1) The cost of the present invention is 70% of the assembly of the parts of the full-turn bridge deck crane, and the effect is 200% of the assembly of the parts of the full-turn bridge deck crane; the cost is 60% of the assembly of the cable crane, and the effect is the full-turn bridge deck 150% of the assembled parts of the crane.

2) The present invention can be fully combined with an intelligent walking system, a safety automatic monitoring system, and a hydraulic system, and conforms to the technological development trend of intelligence, electrification, and automation.

3) The present invention can take into account different beam section weights and different bridge widths, so that the same type of bridges with a span of 400-800 meters in canyon and mountainous areas can be erected, which greatly improves the versatility.

Description of drawings

Fig. 1 is the front view of the whole section bridge deck crane 2 assembled in the present invention.

Fig. 2 is the right side view of Fig. 1 .

FIG. 3 is a top view of FIG. 1 .

Fig. 4 is a front view of the assembled segmental beam 4 of the present invention.

Fig. 5 is a right side view of Fig. 4 .

FIG. 6 is a top view of FIG. 4 .

Fig. 7 is a front view of the entire section deck crane 2 lifting the section beam 4 according to the present invention.

Fig. 8 is a right side view of Fig. 7 .

FIG. 9 is a top view of FIG. 7 .

Fig. 10 is a front view of the segmental beam 4 of the present invention at the rotary station.

Fig. 11 is a right side view of Fig. 10 .

FIG. 12 is a top view of FIG. 10 .

FIG. 13 is an enlarged view at A in FIG. 12 .

FIG. 14 is an enlarged view at B in FIG. 12 .

Fig. 15 is a front view of the connection between the first drop beam 4c and the first longitudinal beam bolt 1c according to the present invention.

Fig. 16 is a right side view of Fig. 15 .

FIG. 17 is a top view of FIG. 15 .

In the figure, 1-the bridge deck of the assembled girder section in the tower area, 1a-beam transport vehicle, 1b-the bridge deck tire frame, 1c-the first longitudinal beam bolt, 1d-the first stay cable support, 1d1-the first inclined Stay cable, 2- entire section deck crane, 2a-beam, 2b-crown, 2c-longitudinal beam, 2d-front outrigger, 2e-rear outrigger, 3-tower area, 4-segment beam, 4a-segmental beam crossbeam, 4b-segmental beam longitudinal beam, 4c-first drop beam, 4d-second longitudinal beam bolt, 4e-second stay cable support.

Detailed ways

The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

Referring to the accompanying drawings, it can be seen that the bridge deck crane for hoisting the whole segment of the composite beam of the cable-stayed bridge based on the eccentric load lateral movement includes the tower area 3, the bridge deck of the assembled beam section in the tower area 1, the entire segment deck crane 2 and Segmental beam 4, the assembled beam section bridge deck 1 in the tower area is located at the lower part of the tower area 3, and the bridge deck of the assembled beam section bridge deck 1 in the tower area is provided with a beam transport vehicle 1a and a hoisting equipment assembled segmental beam 4 The bridge deck tire frame 1b temporarily installed, the ends of the two ends of the assembled beam section bridge deck 1 in the tower area are provided with the first longitudinal beam bolts 1c; Above the two ends of the section bridge deck 1, the whole section bridge deck crane 2 includes a beam 2a, a crane 2b, a longitudinal beam 2c, a front outrigger 2d and a rear outrigger 2e; the crane 2b is installed on the beam 2a; The longitudinal beam 2c is located at both ends of the beam 2a, and the beam 2a is installed on the longitudinal beam 2c through the driving wheel structure; one end of the front leg 2d is connected to the middle of the longitudinal beam 2c, and the other end is connected to the assembled beam section fixed in the tower area. On the bridge deck 1; one end of the rear outrigger 2e is connected to the end of the longitudinal beam 2c near the tower area 3, and the other end is fixed on the assembled beam section bridge deck 1 of the longitudinal beam 2c near the tower area below the tower area 3; The first cable-stayed support 1d is also arranged on the bridge deck 1 of the assembled beam section in the tower area, and the first cable-stayed support 1d is located between the front outrigger 2d and the rear outrigger 2e. The cable support 1d is connected to the top of the tower area 3 through the first cable 1d1;

The section beam 4 includes a section beam crossbeam 4a, a section beam longitudinal beam 4b and a second stay cable support 4e; there are two section beam longitudinal beams 4b, and between the two section beam longitudinal beams 4b Three section beam crossbeams 4a are provided; the second stay cable support 4e is positioned at the middle part of the section beam longitudinal beam 4b; the section beam 4 has an assembly station, a beam feeding station and a rotary station (as shown in Fig. and shown in Figure 6);

At the assembling station, the segmental girder crossbeam 4a and the segmental girder longitudinal girder 4b are assembled into a segmental girder 4 (as shown in FIG. 5 ) on the deck tire frame 1b by lifting equipment;

When feeding the beam station, the segmental beam 4 is located on the beam transport vehicle 1a, and the beam transport vehicle 1a transports the segmental beam 4 to the working range of the entire segment bridge deck crane 2 (as shown in Figure 8);

During the rotary station, the segmental beam 4 is located above the end of the assembled beam section bridge deck 1 in the tower area, and the segmental beam 4 is rotated by 90° through the entire segmental bridge deck crane 2 (as shown in Figures 10, 11, 12 and Figure 13).

When the entire section deck crane 2 is at the rotary station, it first shifts 200cm or an appropriate distance with an unbalanced load, and then rotates the section beam 4 by 90° (as shown in Figures 12 and 13). If the deck crane 2 of the entire segment directly drives the segmental beam 4 to rotate without unbalanced load by 200cm or an appropriate distance, the segmental beam 4 will interfere with the front outrigger 2d during the rotation, and the rotation cannot be completed (as shown in Figure 14 shown), there are two possible solutions:

Method 1: Increase the length of the stringer 2c.

Method 2: When the deck crane 2 of the entire segment is at the rotary station, firstly move the eccentric load laterally by 200cm or an appropriate distance, and then rotate the segmental girder 4 by 90°.

Method 1 increases the length of the longitudinal girder 2c, the longer the longitudinal girder 2c, the greater the bending moment of the longitudinal girder 2c, the section needs to be stronger, and the weight increases; while the second method only needs the partial load of the deck crane 2 of the entire section Transversely moving 200cm or an appropriate distance does not increase the weight of the longitudinal beam 2c, improves construction efficiency and reduces construction cost.

One end of the section beam longitudinal beam 4b is provided with a first drop beam 4c, and the other end is provided with a second longitudinal beam bolt 4d; One end of the beam 4c is close to the bridge deck 1 of the assembled beam section (as shown in FIG. 11 ).

The construction of the present invention is based on the process of hoisting the bridge deck crane for the entire segment of the composite girder of the cable-stayed bridge based on the lateral movement of the partial load, including the following steps:

Step 1: Use the bridge deck 1 of the assembled beam section in the tower area as the assembly platform, and assemble the front outrigger 2d, the rear outrigger 2e, the longitudinal beam 2c, the beam 2a and the crane 2b in sequence through the hoisting equipment (as shown in Figure 2) ;

Step 2: Assemble the segmental girder beam 4a, the segmental girder longitudinal girder 4b and the second stay cable support 4e into a segmental girder 4 on the bridge deck tire frame 1b (as shown in Fig. 4 and Fig. 5 );

Step 3: Fix the segmental beam 4 on the beam transport vehicle 1a (as shown in Figure 5);

Step 4: Transport the segmental girder 4 to the working range of the entire segmental deck crane 2 by the beam transporter 1a (as shown in FIG. 8 );

Step 5: The segmental girder 4 is hoisted by the deck crane 2 of the entire segment, and the lifting point is the center of the mid-beam of the segmental girder beam 4a (as shown in Figures 8 and 9);

Step 6: The whole section bridge deck crane 2 drives the section beam 4 to move longitudinally to the rotary station (as shown in Figure 10);

Step 7: The deck crane 2 of the whole section moves laterally with 200cm or an appropriate distance, and then the beam 4 of the section turns 90°. 12 and Figure 13);

Step 8: The segmental beam 4 falls, and the first falling beam 4c is connected with the first longitudinal beam bolt 1c to complete the erection (as shown in Figure 15, Figure 16 and Figure 17);

Step 9: Initially stretch the second stay cable matched with the second stay cable support 4e, install the bridge deck, and secondly stretch the second stay cable;

Step 10: The bridge deck crane 2 of the entire section moves forward, puts in place, and anchors, and repeats steps 1 to 9 to start the installation of the next beam section until the work is completed.

In actual use, the entire segment deck cranes 2 located above both ends of the assembled beam section deck 1 in the tower area can work crosswise.

Other unspecified parts belong to the prior art.

Claims (3)

1. based on the whole segment lifting erection crane of the traversing cable-stayed bridge composite beam of unbalance loading, it is characterised in that：Including tower area (3), tower Area assembled beam section bridge floor (1), whole segment erection crane (2) and beam sections (4), tower area assembly beam section bridge floor (1) position Yu Taqu (3) lower part, tower area are provided with beam car (1a) and erecting equipment assembly segment on the bridge floor of assembled beam section bridge floor (1) The bridge floor moulding bed (1b) set temporarily during beam (4), the end at tower area assembled beam section bridge floor (1) both ends are both provided with the first longeron Bolt (1c)；The whole segment erection crane (2) is installed on tower area assembled beam section bridge floor (1) both ends top, whole segment bridge floor Loop wheel machine (2) includes crossbeam (2a), overhead traveling crane (2b), longeron (2c), front leg strut (2d) and rear support leg (2e)；Overhead traveling crane (2b) installation In on crossbeam (2a)；The longeron (2c) is installed on longeron positioned at crossbeam (2a) both ends, crossbeam (2a) by driving wheel structure On (2c)；One end of the front leg strut (2d) is connect with the middle part of longeron (2c), and the other end is fixed on tower area assembled beam section bridge On face (1)；One end of the rear support leg (2e) is connect with longeron (2c) close to the one end in tower area (3), and the other end is fixed on longeron The tower area of (2c) below tower area (3) is on assembled beam section bridge floor (1)；The bridge floor of the tower area assembled beam section bridge floor (1) On be additionally provided with the first suspension cable bearing (1d), the first suspension cable bearing (1d) positioned at front leg strut (2d) and rear support leg (2e) it Between, the first suspension cable bearing (1d) at the top of the first suspension cable (1d1) and tower area (3) by connecting；

The beam sections (4) include beam sections crossbeam (4a), beam sections longeron (4b) and the second suspension cable stent (4e)；The section Section beam longeron (4b) has two, and three beam sections crossbeams (4a) are provided between two beam sections longerons (4b)；Described second tiltedly Cable support (4e) is in the middle part of beam sections longeron (4b)；The beam sections (4) have assembled station, feeding beam station and revolution work Position；

In assembled station by erecting equipment on bridge floor moulding bed (1b) by beam sections crossbeam (4a) and beam sections longeron (4b) It is assemblied into beam sections (4)；

In feeding beam station, for beam sections (4) on beam car (1a), beam sections (4) are transported to whole segment bridge floor by beam car (1a) The working range of loop wheel machine (2)；

When turning round station, beam sections (4) are positioned at the top of tower area assembled beam section bridge floor (1) end, and beam sections (4) are by whole Segment erection crane (2) turns round 90 °.

2. the whole segment lifting erection crane of the cable-stayed bridge composite beam traversing based on unbalance loading according to claim 1, feature It is：For the whole segment erection crane (2) when turning round station, first unbalance loading is traversing, then beam sections (4) are turned round 90 °.

3. the whole segment lifting erection crane of the cable-stayed bridge composite beam traversing based on unbalance loading according to claim 1 or 2, special Sign is：Described beam sections longeron (4b) one end is provided with first and falls beam (4c), and the other end is provided with the second longeron bolt (4d)； Beam sections longeron (4b) is provided with the first close assembly in one end for falling beam (4c) after the beam sections longeron (4b) completes revolution Beam section bridge floor (1).