An integrated bridge erection machine and construction method for dry-assembling segmental cap beams

Abstract

The present invention discloses an integrated bridge erection machine and construction method for use under the working condition of dry-assembled segmental cap beams, including a longitudinal guide beam, and four support legs are arranged below the longitudinal guide beam, namely leg No. 1, leg No. 2, leg No. 3 and leg No. 4. Leg No. 1 is a ground-type front support leg, and leg No. 2 and leg No. 3 are both load-bearing support legs. The area between leg No. 1 and leg No. 2 is the front span working area of the dry-assembled segmental cap beam, and the area between leg No. 2 and leg No. 3 is the rear span working area for hoisting the box beam. A No. 1 overhead crane and a No. 2 overhead crane are also arranged above the longitudinal guide beam. Through the present invention, the hoisting operations of prefabricated piers, prefabricated dry-assembled segmental cap beams and prefabricated box beams can be completed in working areas with poor foundation bearing capacity or in narrow areas where automobile cranes cannot construct, thereby avoiding the requirements for crane station positions, reinforcing the foundation, saving construction costs, and reducing safety risks. At the same time, the influence of the long installation process of the dry-assembled segmental cap beams is solved, thereby improving construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated bridge erection construction, and in particular to an integrated bridge erection machine and a construction method for dry-assembling segmental cap beams. Background Art

[0002] Prefabricated bridge components are an advanced process for municipal highway bridge construction. Their factory-based prefabrication is energy-efficient and environmentally friendly. Traditional installation and hoisting, performed using truck-mounted or crawler cranes, places high demands on the foundation's bearing capacity and strict access and site requirements. Due to the limited temporary land available for municipal highway bridge construction, hoisting accidents are prone to occur during construction, and any problems that arise are difficult to remedy. Summary of the Invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and to provide an integrated bridge-building machine for use under dry-assembly segmental cap beam working conditions, comprising a longitudinal guide beam, with four legs arranged below the longitudinal guide beam, namely leg No. 1, leg No. 2, leg No. 3 and leg No. 4, leg No. 1 being a ground-type front leg, and leg No. 2 and leg No. 3 being load-bearing legs, leg No. 1, leg No. 2 and leg No. 3 are all arranged above the pedestal, and the area between leg No. 1 and leg No. 2 is the front span working area for dry-assembly segmental cap beams, and the area between leg No. 2 and leg No. 3 is the rear span working area for hoisting box beams, and overhead crane No. 1 and overhead crane No. 2 are also arranged above the longitudinal guide beam.

[0004] Preferably, it also includes a ground-type support leg transverse movement mechanism, which is used to move the entire machine transversely to the hoisting position of the left and right wing dry-assembled segment cap beams.

[0005] Preferably, an auxiliary overhead crane hoist is further provided on the longitudinal guide beam on the left side of the No. 1 overhead crane, and the auxiliary overhead crane hoist is in a fish belly shape.

[0006] A construction method comprises the following steps:

[0007] S1. After installing the prefabricated piers and dry-assembled segmental cap beams in the front span operation area and the prefabricated box beams in the rear span operation area, conduct a comprehensive inspection of the bridge erection machine and loosen the rollers and main beam anchoring devices;

[0008] S2: The No. 2 outrigger is moved forward to support the erected and anchored cap beam. The three overhead cranes stop near the No. 2 outrigger; the No. 1 outrigger is released and lifted to 500mm above the ground.

[0009] S3. Use the roller mechanism of the No. 2 and No. 3 outriggers to push the main beam forward 10.9m to support the No. 4 outrigger. Release the No. 3 outrigger and move the No. 3 outrigger forward 30m to support and anchor the top of the front cap beam. Release the No. 4 outrigger. Use the roller mechanism of the No. 2 and No. 3 outriggers to push the main beam forward 9m. Move the No. 1 and No. 2 overhead cranes back to near the top of the No. 3 outrigger. Use the roller mechanism of the No. 2 and No. 3 outriggers to push the main beam forward 11m to support the No. 1 outrigger. Anchor the main beam and outriggers. Completely inspect the bridge erection machine and begin erection.

[0010] S4. Put the bridge erecting machine and the overhead crane in place, hang the wire rope from the lifting hole, and the No. 1 and No. 2 overhead cranes work together to vertically lift the pier column to the top of the installation platform;

[0011] S5. After the No. 1 overhead crane installs the pier column in place, the beam transporter transports the cap beam to the lifting position, and the No. 1 overhead crane erects the middle main segment cap beam for anchoring;

[0012] S6. Use the auxiliary crane to install the left and right wing segment cap beams. At this time, the No. 1 and No. 2 cranes cooperate to continue the prefabricated box girder hoisting operation. Check the bridge erection machine thoroughly, loosen the rollers and main beam anchoring device, anchor the No. 2 support leg to the erected box girder, and stop the No. 1 and No. 2 cranes above the No. 2 and No. 3 support legs. The bridge erection machine is now ready for the hole.

[0013] S7. Repeat the construction steps S1-S6 in a loop until all prefabricated columns, prefabricated dry-assembled cap beams and prefabricated box beams within the construction scope are erected and installed.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The construction method of the present invention can complete the hoisting operation of prefabricated piers, prefabricated dry-assembled segmental cap beams and prefabricated box beams in working areas with poor foundation bearing capacity or narrow areas where mobile cranes cannot be used for construction, thus avoiding the need for crane station positioning, reinforcing the foundation, saving construction costs and reducing safety risks.

[0016] 2. In combination with the characteristics of the present invention, a new prefabricated component installation process is invented: first install the piers and main segment cap beams, then carry out synchronous operations on the wing segment cap beams and prefabricated box beams in two front and rear work intervals, and finally carry out through-hole operations, so as to complete the reciprocating installation of the piers, dry-assembled segment cap beams, and box beam components of the entire line, solving the problem of the long installation time of the dry-assembled segment cap beams and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the design of the present invention;

[0019] Figure 2 This is a construction flow chart of the present invention;

[0020] Figure 3 This is a process diagram of the bridge erection machine before passing through the hole in the present invention;

[0021] Figure 4 This is a diagram of the forward moving and anchoring process of the second leg of the bridge erecting machine described in the present invention;

[0022] Figure 5 This is a process diagram of the entire bridge erection machine of the present invention moving forward to the next span working surface;

[0023] Figure 6 The process diagram of installing two prefabricated piers by the bridge erection machine of the present invention is as follows;

[0024] Figure 7 This is a process diagram of the main segment cap beam installed by the bridge erection machine of the present invention;

[0025] Figure 8 This is a process diagram of the synchronous operation of the two-span working surfaces of the bridge erection machine described in the present invention (the front span hoisting the wing segment cap beam, the rear span hoisting the prefabricated box beam);

[0026] Figure 9 This is the main view of the No. 1 support leg position.

[0027] In the figure: 1. Longitudinal guide beam, 2. No. 1 overhead crane, 3. No. 2 overhead crane, 4. No. 1 support leg, 5. No. 2 support leg, 6. No. 3 support leg, 7. No. 4 support leg, 8. Auxiliary overhead crane. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0029] Please refer to the figure and Figures 1 to 3An integrated bridge erection machine for dry-joined segmental cap beam working conditions includes a longitudinal guide beam 1, and four legs are arranged below the longitudinal guide beam 1, namely, leg 1 4, leg 2 5, leg 3 6 and leg 4 7. Leg 1 4 is a ground-type front leg, and leg 2 5 and leg 3 6 are both load-bearing legs. Leg 1 4, leg 2 5 and leg 3 6 are all arranged above the pedestal. Between leg 1 4 and leg 2 5 is the dry-joined segmental cap beam. The front span operation area, between the No. 2 support leg 5 and the No. 3 support leg 6 is the rear span operation area for lifting the box beam, and the No. 1 overhead crane 2 and the No. 2 overhead crane 3 are also arranged above the longitudinal guide beam 1, and the auxiliary overhead crane 8 hoist is also arranged on the left side of the No. 1 overhead crane 2 on the longitudinal guide beam 1. The auxiliary overhead crane 8 hoist is in a fish belly shape. The present invention fully improves the utilization rate of the front and rear lifting overhead cranes and the auxiliary overhead crane 8, solves the problem of the bridge erection machine being idle during the three-day dry-assembly cap beam construction, and there is no waiting state. The specific manifestations are: on the first day, the main segment (middle segment) of the dry-assembled segmental cap beam is installed, and the 200-ton front crane of the bridge-building machine is used to install it above the two erected piers; on the second and third days, the segmental cap beams of the left and right wings can be installed respectively, with a construction efficiency of 1 piece / day. The work content includes hoisting, coating dry-joint resin and tightening of fine-rolled threaded steel bars, etc. The auxiliary crane 8 will continue to cooperate in the following two days; the front and rear crane systems can carry out the hoisting operation of the prefabricated box beam of the rear span on the second and third days, with a construction efficiency of 3-4 beams / day; it takes 3 days to complete the dry-assembled cap beam operation of the front span and the prefabricated box beam operation of the rear span. On the fourth day, the hole is passed. The working efficiency is doubled in the process, and the lifting mechanisms of the equipment are also fully operational.

[0030] The machine also includes a floor-mounted outrigger lateral movement mechanism, which is used to move the entire machine horizontally to the hoisting position for the dry-assembled segment cap beams on the left and right wings, thereby completing the hoisting operation. The lateral movement mechanism includes a motor, a reducer, a lateral movement trolley, and a lateral movement track. Six interlocking hydraulic systems are installed below the lateral movement track. The hydraulic system consists of hydraulic cylinders, hydraulic oil pipes, a hydraulic pump station, a balancing valve, an inclination sensor, and other devices. The interlocking hydraulic system can detect and level the inclination of the floor-mounted outriggers, ensuring that the lateral movement track remains horizontal, thereby preventing the machine from tipping over due to uneven ground.

[0031] Finally, an auxiliary crane 8 hoist is installed on the longitudinal guide beam 1, to the left of the No. 1 crane 2. This fish-belly-shaped crane features a lifting system that independently completes the lifting of the remaining dry-assembled cap beams on the left and right wings (excluding the main segment). This frees up the front crane's lifting system and enhances the rear crane's lifting system, which, in conjunction with the front crane, completes the box girder lifting operation. The auxiliary crane 8 hoist system comprises a winch, motor reducer, longitudinal and transverse movement mechanism, movable and fixed pulley blocks, wire ropes, and slings. With a set lifting ratio, the auxiliary crane 8's lifting capacity meets the requirements for the dry-assembled cap beams on the wings.

[0032] The construction method of the present invention comprises the following steps:

[0033] S1. After installing the prefabricated piers and dry-assembled segmental cap beams in the front span operation area and the prefabricated box beams in the rear span operation area, conduct a comprehensive inspection of the bridge erection machine, loosen the rollers and main beam anchoring devices, and prepare for the hole;

[0034] S2, No. 2 support leg 5 is moved forward to support the cap beam that has been erected and anchored. The three overhead cranes stop near No. 2 support leg 5; No. 1 support leg 4 is released and lifted to 500mm above the ground;

[0035] S3. Use the roller mechanism of No. 2 outrigger 5 and No. 3 outrigger 6 to push the main beam forward 10.9m to support No. 4 outrigger 7. Release No. 3 outrigger 6 and move No. 3 outrigger 6 forward 30m to support and anchor the upper part of the front cap beam. Release No. 4 outrigger 7 and use the roller mechanism of No. 2 outrigger 5 and No. 3 outrigger 6 to push the main beam forward 9m. Move No. 1 overhead crane 2 and No. 2 overhead crane 3 back to near the top of No. 3 outrigger 6. Use the roller mechanism of No. 2 outrigger 5 and No. 3 outrigger 6 to push the main beam forward 11m to support No. 1 outrigger 4. Anchor the main beam and outriggers. Thoroughly inspect the bridge erection machine and begin erection.

[0036] S4. Put the bridge erecting machine and the overhead crane in place, hang the wire rope from the lifting hole, and the No. 1 overhead crane 2 and the No. 2 overhead crane 3 work together to vertically lift the pier column to the top of the installation platform;

[0037] S5. After the No. 1 overhead crane 2 installs the pier column in place, the beam transporter transports the cap beam to the lifting position, and the No. 1 overhead crane 2 erects the middle main segment cap beam and anchors it;

[0038] S6. Use the auxiliary overhead crane 8 to install the left and right wing segment cap beams. At this time, the No. 1 overhead crane 2 and the No. 2 overhead crane 3 cooperate to continue the prefabricated box girder hoisting operation. Check the bridge erection machine thoroughly, loosen the rollers and the main beam anchoring device, anchor the No. 2 support leg 5 on the erected box girder, and stop the No. 1 and No. 2 overhead cranes 3 above the No. 2 and No. 3 support legs 6. At this point, the bridge erection machine is ready for the hole.

[0039] S7. Repeat the construction steps S1-S6 in a loop until all prefabricated columns, prefabricated dry-assembled cap beams and prefabricated box beams within the construction scope are erected and installed.

[0040] Therefore, the present invention can complete the lifting operations of prefabricated piers, prefabricated dry-assembled segmental cap beams and prefabricated box beams in working areas with poor foundation bearing capacity or narrow areas where automobile cranes cannot operate, avoiding the reinforcement of foundations due to crane station requirements, saving construction costs, and reducing safety risks; in addition, the present invention provides for first installing piers and main segmental cap beams, then performing synchronous operations of wing segmental cap beams and prefabricated box beams in two front and rear working intervals, and finally performing through-hole operations, thereby completing the reciprocating installation of piers, dry-assembled segmental cap beams, and box beam components of the entire line, solving the impact of the long and intensive installation process of dry-assembled segmental cap beams, and improving construction efficiency.

[0041] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A construction method for an integrated bridge erection machine for dry-assembling segmental cap beams, characterized in that: The bridge erection machine includes a longitudinal guide beam, and four legs are provided below the longitudinal guide beam, namely leg No. 1, leg No. 2, leg No. 3 and leg No. 4, leg No. 1 is a ground-type front leg, and legs No. 2 and legs No. 3 are both load-bearing legs, and legs No. 1, legs No. 2 and legs No. 3 are all provided above the pedestal, and a front span operation section for dry-assembling segmental cap beams is located between legs No. 1 and No. 2, and a rear span operation section for hoisting box beams is located between legs No. 2 and No. 3, and a No. 1 overhead crane and a No. 2 overhead crane are further provided above the longitudinal guide beam; It also includes a floor-type outrigger transverse movement mechanism, which is used to move the entire machine transversely to the hoisting position of the left and right wing dry-assembled segment cap beams; An auxiliary overhead crane hoist is also provided on the longitudinal guide beam on the left side of the No. 1 overhead crane, and the auxiliary overhead crane hoist is in a fish belly shape; The construction method comprises the following steps: S1. After installing the prefabricated piers and dry-assembled segmental cap beams in the front span operation area and the prefabricated box beams in the rear span operation area, conduct a comprehensive inspection of the bridge erection machine and loosen the rollers and main beam anchoring devices; S2: The No. 2 outrigger is moved forward to support the erected and anchored cap beam. The three overhead cranes stop near the No. 2 outrigger; the No. 1 outrigger is released and lifted to 500mm above the ground. S3. Use the roller mechanism of the No. 2 and No. 3 outriggers to push the main beam forward 10.9m to support the No. 4 outrigger. Release the No. 3 outrigger and move the No. 3 outrigger forward 30m to support and anchor the top of the front cap beam. Release the No. 4 outrigger. Use the roller mechanism of the No. 2 and No. 3 outriggers to push the main beam forward 9m. Move the No. 1 and No. 2 overhead cranes back to near the top of the No. 3 outrigger. Use the roller mechanism of the No. 2 and No. 3 outriggers to push the main beam forward 11m to support the No. 1 outrigger. Anchor the main beam and outriggers. Completely inspect the bridge erection machine and begin erection. S4. Put the bridge erecting machine and the overhead crane in place, hang the wire rope from the lifting hole, and the No. 1 and No. 2 overhead cranes work together to vertically lift the pier column to the top of the installation platform; S5. After the No. 1 overhead crane installs the pier column in place, the beam transporter transports the cap beam to the lifting position, and the No. 1 overhead crane erects the middle main segment cap beam for anchoring; S6. Use the auxiliary crane to install the left and right wing segment cap beams. At this time, the No. 1 and No. 2 cranes cooperate to continue the prefabricated box girder hoisting operation. Check the bridge erection machine thoroughly, loosen the rollers and main beam anchoring device, anchor the No. 2 support leg to the erected box girder, and stop the No. 1 and No. 2 cranes above the No. 2 and No. 3 support legs. The bridge erection machine is now ready for the hole. S7. Repeat the construction steps S1-S6 in a loop until all prefabricated columns, prefabricated dry-assembled cap beams and prefabricated box beams within the construction scope are erected and installed.

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