CN-116837748-B - Multi-connection multi-span bridge synchronous pushing device and method

CN116837748BCN 116837748 BCN116837748 BCN 116837748BCN-116837748-B

Abstract

The invention discloses a synchronous pushing device and method for a multi-connected multi-span bridge, which comprises a substrate, wherein a plurality of lifting supporting legs are arranged on the lower side of the substrate, a first slideway, a second slideway and a third slideway which are parallel to each other are arranged on the upper side of the substrate, a first lifting mechanism is arranged in the first slideway, a second lifting mechanism is arranged in the second slideway, a third lifting mechanism is arranged in the third slideway, an installation seat is fixedly arranged on the upper side of the substrate, the installation seat is connected with a first horizontal pushing driving oil cylinder, a second horizontal pushing driving oil cylinder and a third horizontal pushing driving oil cylinder, the first lifting mechanism and the third lifting mechanism synchronously lift, the first lifting mechanism and the second lifting mechanism alternately lift, the first horizontal pushing driving oil cylinder and the third horizontal pushing driving oil cylinder synchronously stretch, the first horizontal pushing driving oil cylinder and the second horizontal pushing driving oil cylinder alternately stretch, the bridge conveying construction speed is high, and the problem that a bridge is difficult to adapt to a slope change section is solved.

Inventors

ZHOU WEI
YANG BING
SONG RUI
YANG WEI
ZHU ZHIQIANG
ZHANG QIAN
SONG ZHENHUI
WAN LI
LIU KE
Huang Geyin
CHEN CHAOWEI

Assignees

湖北楚天联发路桥养护有限公司

Dates

Publication Date: 20260512
Application Date: 20230815

Claims (8)

1. The multi-connected multi-span bridge synchronous pushing device is characterized by comprising a base plate (1), wherein a plurality of lifting support legs (2) are arranged on the lower side of the base plate (1), a first slideway (3), a second slideway (4) and a third slideway (5) which are parallel to each other are arranged on the upper side of the base plate (1), a first jacking mechanism is arranged in the first slideway (3), a second jacking mechanism is arranged in the second slideway (4), a third jacking mechanism is arranged in the third slideway (5), an installation seat (6) is fixedly arranged on the upper side of the base plate (1), the installation seat (6) is connected with a first jacking driving oil cylinder (7), a second jacking driving oil cylinder (8) and a third jacking driving oil cylinder (9), the first jacking driving oil cylinder (7) is connected with the first jacking mechanism, the second jacking driving oil cylinder (8) is connected with the second jacking mechanism, and the third jacking driving oil cylinder (9) is connected with the third jacking mechanism; The first lifting mechanism, the second lifting mechanism and the third lifting mechanism comprise two sliding seats (10) which are connected in series, the two sliding seats (10) are sequentially arranged along corresponding sliding ways, one sliding seat (10) is connected with a telescopic rod of a corresponding horizontal pushing driving oil cylinder, each sliding seat (10) is connected with one lifting oil cylinder (11), and each lifting oil cylinder (11) is hinged with a pushing plate (15); a horizontal pushing adjusting oil cylinder (13) is arranged between every two sliding seats (10).
2. The multi-connected multi-span bridge synchronous pushing device according to claim 1 is characterized in that two sliding seats (10) of the second jacking mechanism are of shell structures with upper openings, the bottoms of the jacking cylinders (11) are in sliding abutting joint with the inner walls of the bottoms of the shell structures, deviation correcting cylinders (14) are arranged on one sides of the two sliding seats (10), the deviation correcting cylinders (14) are perpendicular to the second sliding tracks (4), and telescopic rods of the deviation correcting cylinders (14) penetrate through the shell of the sliding seats (10) and are in abutting joint with one sides of the jacking cylinders (11).
3. The multi-connected multi-span bridge synchronous pushing device according to claim 1, wherein the pushing plate (15) comprises a movable plate (16) and a fixed plate (17) which are stacked up and down, a concave surface is arranged on the lower side of the movable plate (16), a convex surface is arranged on the upper side of the fixed plate (17), a sinking groove (18) is arranged in the middle of the movable plate (16), a strip-shaped through groove (19) is arranged at the bottom of the sinking groove (18), and a bolt penetrates through the strip-shaped through groove (19) to be connected with the fixed plate (17).
4. The multi-connected multi-span bridge synchronous pushing device is characterized in that four limiting plates (20) which are parallel to each other are fixedly arranged on the upper side of the base plate (1), the four limiting plates (20) form a first slideway (3), a second slideway (4) and a third slideway (5) between every two, and the first flat pushing driving oil cylinder (7), the second flat pushing driving oil cylinder (8) and the third flat pushing driving oil cylinder (9) are arranged at the end parts of the same side of the corresponding slideways.
5. The multi-connection multi-span bridge synchronous pushing device according to claim 1, comprising a laser ranging device fixedly arranged at the head end of the substrate (1).
6. The bridge synchronous pushing method of a pushing device according to any one of claims 1 to 5, comprising the steps of: S1, presetting a plurality of fixed piles along the bridging direction, wherein each fixed pile is provided with one pushing device, and the second jacking mechanism is in a jacking state; S2, hanging and rotating the bridge box girder to the upper parts of a plurality of fixed piles at the first section, and then descending to the bottom of the bridge box girder to contact with the pushing device; S3, each pushing device synchronously acts, a second flat pushing driving oil cylinder (8) firstly pushes a second jacking mechanism to move along a second slideway (4), the second jacking mechanism drives a bridge box girder to move for a preset distance, the first jacking mechanism and the third jacking mechanism synchronously lift to be flush with the second jacking mechanism, then the second jacking mechanism descends and retreats, and the first jacking mechanism and the third jacking mechanism drive the bridge box girder to move for a preset distance again and circulate in sequence, so that the bridge box girder stably moves forward.
7. The synchronous pushing method of the bridge according to claim 6, wherein the bottom of the bridge box girder is provided with a slope-changing section, when the pushing device is positioned in the slope-changing section, the jacking cylinders (11) arranged end to end change the extending amount according to the gradient, when the distance between the base plate and the girder bottom becomes larger or smaller than a preset value, the corresponding pushing device synchronously lifts or descends for a preset distance, and meanwhile, the jacking cylinders (11) in the extending state extend or retract for the same distance.
8. The synchronous pushing method of the bridge according to claim 7, wherein when the junction of the variable slope sections of the bridge box girder is displaced to the head end of one pushing device, all the pushing devices stop synchronously, and if the second jacking mechanism is in a retracted state, the distance between the two jacking cylinders (11) of the second jacking mechanism is adjusted, so that the pushing plate (15) avoids the junction of the variable slope sections; if the first lifting mechanism and the third lifting mechanism are in a retracted state, the distance between the two lifting cylinders of the first lifting mechanism and the third lifting mechanism is respectively adjusted, so that the pushing plate (15) avoids the junction of the variable slope section.

Description

Multi-connection multi-span bridge synchronous pushing device and method Technical Field The invention relates to the technical field of bridge pushing equipment, in particular to a multi-connection multi-span bridge synchronous pushing device and method. Background The pushing construction is to set prefabricated field behind bridge abutment along bridge axis and steel guide beam, temporary pier, slideway and horizontal jack force applying device. Specifically, the segments of the precast concrete beam are connected into a whole by longitudinal prestressed tendons, the beams are pushed out (pulled out) section by section, and then the next beam Duan Jiaozhu is continued on a narrowed beam making pedestal, so that the construction method of repeated circulation construction is that of pushing method. The pushing construction is the application of the steel bridge pulling method erection principle, except that the sliding and force application devices are different. The pushing device is a key device applied to the pushing method, and is concentrated on an abutment or pier near the girder prefabricated field, and sliding bearings are arranged on all supporting points in front. The pushing device is divided into two types, wherein one type is that a horizontal jack pushes the precast beam through pulling steel bars at two sides of the box beam, the other type is that the horizontal jack is matched with a vertical jack to push the precast beam to advance, in the aspect of pushing equipment, a pull rod type pushing scheme is generally adopted in China, a pair of hydraulic through type horizontal jacks are arranged on each pier position, one or two phi 25 mm high-strength threaded steel bars are used for each commercial pole at each side, the front end of each pole is fixed on the head part of a piston rod of the horizontal jack through a conical wedge, the other end of each pole is connected with the box beam through connectors such as a special anchor pulling device, a special steel plate and the like, the horizontal jack is fixed on a special pedestal of a pier body, and meanwhile, a sliding plate and a sliding block are arranged below the beam position. When the horizontal jack is jacked, the box girder is driven to slide forwards on the slideway. The prior art has the defects that (1) the contact part of the lower sides of some bridges and the bridge piers is provided with a variable slope section, the existing pushing device is difficult to adapt to the bridge with the variable slope section and large vertical curvature, (2) the bridge in the pushing process is repeatedly lifted and falls, more temporary constraint is needed, the tensioning procedure is complicated, the internal stress of the bridge is large, and the construction progress is slower along with the increase of the bridge length. Disclosure of Invention The invention aims at solving the problems in the prior art, and provides a synchronous pushing device and method for a multi-connection multi-span bridge, which have the advantages of high construction speed and stable bridge transportation and solve the problem that the bridge is difficult to adapt to a variable slope section. In order to achieve the above purpose, the invention adopts the following technical scheme: A multi-connection multi-span bridge synchronous pushing device comprises a base plate, wherein a plurality of lifting supporting legs are arranged on the lower side of the base plate, a first slideway, a second slideway and a third slideway which are parallel to each other are arranged on the upper side of the base plate, a first lifting mechanism is arranged in the first slideway, a second lifting mechanism is arranged in the second slideway, a third lifting mechanism is arranged in the third slideway, an installation seat is fixedly arranged on the upper side of the base plate, the installation seat is connected with a first flat pushing driving oil cylinder, a second flat pushing driving oil cylinder and a third flat pushing driving oil cylinder, the first flat pushing driving oil cylinder is connected with the first lifting mechanism, the second flat pushing driving oil cylinder is connected with the second lifting mechanism, the third flat pushing driving oil cylinder is connected with the third lifting mechanism, the first lifting mechanism and the third lifting mechanism are synchronously lifted, the first lifting mechanism and the second lifting mechanism alternately lift, the first flat pushing driving oil cylinder and the third flat pushing driving oil cylinder are synchronously stretched, and stretched alternately. The first lifting mechanism, the second lifting mechanism and the third lifting mechanism comprise two sliding seats which are connected in series, one sliding seat is connected with the telescopic rod of the corresponding flat pushing driving oil cylinder, the two sliding seats are sequentially arranged along the corresponding sliding way, each sliding se