CN109736212B - Rolling friction type walking pushing device for bridge segment installation - Google Patents
Rolling friction type walking pushing device for bridge segment installation Download PDFInfo
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- CN109736212B CN109736212B CN201910053360.0A CN201910053360A CN109736212B CN 109736212 B CN109736212 B CN 109736212B CN 201910053360 A CN201910053360 A CN 201910053360A CN 109736212 B CN109736212 B CN 109736212B
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Abstract
The invention discloses a rolling friction type walking pushing device for bridge segment installation, which comprises a groove type walking track tray (1) formed by welding peripheral side plates and a bottom plate in a combined mode, a long-stroke pushing hydraulic jack (2) fixed on an end plate orthogonal to the pushing direction of the tray, a rolling moving platform truck (3) arranged in the tray and connected with a pin shaft of the pushing hydraulic jack, a steel plate box (4) arranged and fixed on the rolling moving platform truck (3), a steel plate cup-shaped sliding shoe (5) arranged in the steel plate box (4) and connected with a transverse deviation correcting hydraulic jack (6) fixed on the side plate orthogonal to the pushing direction of the steel plate box through a pin shaft, and a jacking hydraulic jack (7) arranged in the steel plate cup-shaped sliding shoe. The invention greatly reduces the horizontal thrust at the top of the bridge pier or the temporary buttress and the local stress when the girder body is jacked in the jacking installation process of the bridge, and can realize smooth and rapid jacking.
Description
Technical Field
The invention relates to a rolling friction type walking pushing device for bridge segment installation, and belongs to the field of civil engineering bridge construction installation equipment.
Background
In civil engineering bridge construction, the installation of various precast concrete bridges and steel bridges for road and municipal engineering across lines and channels is required to be carried out under the condition of no interruption of traffic and navigation of channels. In recent years, a pushing device is arranged on a bridge pier or a temporary buttress, and the newly-built bridge is manufactured in segments, and continuous traction or exchange supporting pushing construction is gradually increased. The known walking pushing device for bridge segment installation construction mainly comprises the steps of placing a hydraulic jack for jacking up a bridge body on a sliding plate, wherein the friction mode between an engineering plastic sliding shoe fixed at the bottom of the jack and the sliding plate placed on the pier top or the steel beam at the top of a support frame is sliding friction. The friction is characterized in that although lithium-based grease lubrication is adopted, the friction force from static friction started by pushing the bridge segment to dynamic friction for pushing the beam body to move is still relatively large due to the relative sliding friction relation between the contact surface and the contact surface, and generally accounts for about 10% of the load of the lifting bridge beam body, a plurality of pushing jacks are easier to generate discrete shaking when working simultaneously, the horizontal thrust at the top of a bridge pier or a temporary buttress is increased, and the smooth pushing construction of the bridge is influenced due to frequent alternate working from static friction to dynamic friction.
Disclosure of Invention
Technical problems: aiming at the defects of the prior art, the invention aims to provide a rolling friction type walking pushing device for bridge segment installation, which utilizes the characteristic that rolling friction is obviously smaller than sliding friction, and adopts the rolling friction mode that a plurality of rollers are arranged below a bearing steel plate platform plate of a jacking hydraulic jack to replace the sliding friction mode of a known placing sliding plate, so that the smoothness of bridge pushing installation and the horizontal thrust of the top of a few piers or temporary piers are improved, and the diameter of a cylinder body is increased by utilizing a conventional bridge prestress tensioning jack, the contact area and jacking stability of the top surface of an oil cylinder and a jacking beam body are increased, and the purpose of dual purposes of one jacking is achieved.
The technical scheme is as follows: the rolling friction type walking pushing device provided by the invention changes the sliding shoe block under the hydraulic jack of the well-known lifting bridge beam body into a 'one working mode' of longitudinal reciprocating long-stroke movement sliding and short-stroke sliding of a transverse deviation correcting hydraulic jack into a 'separation working mode' on the sliding plate, namely the long-stroke longitudinal pushing of the main working mode adopts a rolling friction type, so that the pushing force is reduced, the smoothness of synchronous pushing of a plurality of pushing machines is ensured, and the short-stroke transverse deviation correcting of the secondary working mode still adopts a sliding friction type. In order to realize a rolling friction type pushing working mode, a jacking hydraulic jack is placed on a rolling moving platform truck, a plurality of rows of rollers connected with a plurality of chain plates are arranged below a platform plate of the platform truck, and a piston rod of the long-stroke pushing hydraulic jack fixed on a groove-type walking track tray is connected with the rolling platform truck in a pin joint mode, so that the rollers of the rolling platform truck longitudinally reciprocate in the groove-type walking track tray to directionally linearly walk and roll, and a jacked bridge girder body is driven to longitudinally move.
The invention relates to a rolling friction type walking pushing device for bridge segment installation, which comprises a groove type walking track tray formed by welding peripheral side plates and a bottom plate in a combined manner, a long-stroke pushing hydraulic jack fixed on an end plate of a tray orthogonal to the pushing direction, a rolling moving platform truck arranged in the tray and connected with a pin shaft of the pushing hydraulic jack, a steel plate box arranged and fixed on the rolling moving platform truck, a steel plate cup-shaped sliding shoe arranged in the steel plate box and connected with a pin shaft of a transverse deviation correcting hydraulic jack fixed on the side plate of the steel plate box orthogonal to the pushing direction, and a lifting hydraulic jack arranged in the steel plate cup-shaped sliding shoe.
A plurality of triangular stiffening rib plates are arranged below the platform plate of the rolling mobile platform truck and are welded and reinforced with the vertical support plates, so that the eccentric load resistance of the platform plate during transverse deviation correction is improved; a plurality of rows of rollers connected with a plurality of chain plates are placed below the roller horizontal bearing plate which is transversely and welded and fixed on the vertical bearing plate, so that a rolling friction moving mode of the platform truck under heavy load is realized; the outer sides of the vertical supporting plates below the platform plates are respectively provided with 1 pair of side limiting rollers at front and back and are clamped in the groove-shaped walking track tray, a single-side gap of 1-3 mm is reserved, and the rolling moving platform trolley is limited to do directional linear reciprocating movement in the pushing stroke.
The outer side of the vertical supporting plate is welded with a pair of steel cylinder shafts perpendicular to the side plate surfaces within the stroke range of the pushing hydraulic jack, a front half section of the steel sleeve which is cut off in the radial direction is arranged on the shafts and can rotate around the steel cylinder shafts, and a welding handle at the end of the steel sleeve can adjust the rotation angle to clamp the cut-off half steel sleeve into the clamping plate teeth of the tray for clamping and locking the pushing position, so that the mobile platform truck is prevented from sliding backwards; the long-stroke cylinder single lug plate of the pushing hydraulic jack fixed on the vertical end plate of the groove-type tray is connected with the pin shaft inserted into the top plate hole of the mouth-shaped steel plate box through two horizontal bolts screwed into the side plate of the mouth-shaped steel plate box and can rotate.
The length of the groove-shaped walking track tray is equal to the length of the rolling moving platform car plus the pushing stroke length, and the width of the groove-shaped walking track tray is equal to the width between the lateral limiting rollers at two sides of the rolling moving platform plus a reserved gap; the heights of steel plates at two longitudinal sides of the groove-shaped walking track tray are lower than the heights of stiffening rib plate roots of the platform plate, and tooth-shaped pushing position locking clamping plates are processed in the pushing stroke length range of the groove-shaped walking track tray.
The steel plate box placed and fixed on the platform plate of the rolling platform truck is formed by welding four steel plate side plates and a bottom plate, a mirror surface stainless steel plate is fixed on the bottom plate in the steel plate box to serve as a sliding plate, the net length of the inner side of the steel plate box orthogonal to the longitudinal pushing of the bridge is equal to the length of a steel pipe cup-shaped sliding shoe placed in the box plus the transverse correction positive and negative quantity, and the net length of the inner side of the steel plate box in the longitudinal pushing direction is slightly larger than the width of the steel pipe cup-shaped sliding shoe; the bottom plate of the steel plate box is fixed with the platform plate of the rolling mobile platform car by a plurality of bolts to form a detachable connection mode.
The jacking hydraulic jack placed in the steel pipe cup-shaped sliding shoe directly utilizes the bridge prestress tension through hydraulic jack, a steel pipe of the steel pipe cup-shaped sliding shoe is welded and fixed with a rectangular steel bottom plate, a positioning disc in the through jack is fixed above the rectangular steel bottom plate by bolts, an engineering plastic alloy sliding plate is fixed below the rectangular steel bottom plate by countersunk bolts, and an ear plate connected with a pin shaft of the transverse deviation correcting hydraulic jack is connected to the outer side wall of the steel pipe of the sliding shoe; and a bearing steel plate with a positioning circular plate is placed at the top of the jacking hydraulic jack to form a lifting steel platform for supporting the bridge girder body.
The beneficial effects are that: compared with the prior art, the invention has the advantages that:
1. the rolling friction is obviously smaller than the sliding friction, the rolling friction mode of arranging a plurality of rollers below the bearing steel plate platform plate of the jacking hydraulic jack is used for replacing the sliding friction mode of the prior placing sliding plate, so that the smoothness of the jacking installation of the bridge and the horizontal thrust of the tops of less piers or temporary piers are improved.
2. The sliding shoe block under the hydraulic jack of the known jacking bridge beam body is not only longitudinally reciprocated and slid for a long stroke on the sliding plate, but also changed into a 'separation working mode' as a 'one working mode' of short-stroke sliding movement of the transverse deviation correcting hydraulic jack, namely, long-stroke longitudinal pushing of the main working mode adopts rolling friction movement, short-stroke transverse deviation correcting of the secondary working mode still adopts sliding friction movement, and smoothness of reciprocating movement from 'static' to 'dynamic' is more beneficial to ensuring when a plurality of thrusters synchronously push.
3. The prestress tensioning hydraulic jack in the conventional bridge engineering is used as the jacking jack for jacking the girder body, the diameter of the cylinder body of the penetrating cylinder is large, the area of the bearing plate placed on the top surface of the jacking jack is increased, and the local bearing stress of the part closely attached to the girder body of the segmental bridge is reduced.
Drawings
FIG. 1 is a schematic diagram of an overall assembly of a bridge segment mounted rolling friction walking pushing device of the present invention;
fig. 2 (a) is a schematic structural view of the mobile platform truck 3 according to the present invention, fig. 2 (b) is a schematic side structural view of the mobile platform truck 3, and fig. 2 (c) is a schematic connecting view of the long-stroke pushing hydraulic jack 2 and the mouth-shaped steel plate box 15 at the end of the mobile platform truck 3;
fig. 3 (a) is a schematic view of a trough-shaped walking track tray 1 according to the present invention, fig. 3 (b) is a schematic view of a rotation position of a clamping device of a mobile platform car 3 under a pushing walking condition, and fig. 3 (c) is a schematic view of a rotation position under a pushing locking condition;
fig. 4 (a) is a schematic view of a steel plate box 4 placed in a trough-type travelling rail tray according to the present invention, and fig. 4 (b) is a schematic view of fixing a mirror stainless steel plate 22 in the steel plate box;
fig. 5 (a) is an assembly schematic diagram of a steel pipe cup-shaped sliding shoe 5 placed in a steel plate box and a penetrating jacking hydraulic jack 2 according to the invention, fig. 5 (b) is a section view of fig. 5 (a) A-A, namely, an assembly section view of a positioning disc 26 of a fixed penetrating jack on a rectangular steel bottom plate 25 of a sliding shoe at the bottom of the long-stroke jacking hydraulic jack 2 and a top bearing supporting plate 30, and fig. 5 (c) is a schematic diagram of a pin shaft connection of an ear plate 29 welded on a steel pipe 23 of the sliding shoe 5 and a deviation rectifying hydraulic jack 6; fig. 5 (d) is a schematic diagram of the connection of the rectifying hydraulic jack 6 to the steel casing 23.
Fig. 6 (a) is a construction schematic diagram of the vertical lifting beam of the through-hole lifting hydraulic jack 7 of the present invention, fig. 6 (b) is a construction schematic diagram of the longitudinal lifting one stroke of the long-stroke lifting hydraulic jack 2 of the present invention, fig. 6 (c) is a construction schematic diagram of the retraction of the oil cylinder of the lifting hydraulic jack 7 of the present invention, liang Tila to the pier, and fig. 6 (d) is a construction schematic diagram of the retraction of the oil cylinder of the long-stroke lifting hydraulic jack 2 of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific examples.
As shown in fig. 1, a groove-shaped walking track tray 1, a long-stroke pushing hydraulic jack 2, a movable platform car 3, a steel plate box 4, a steel pipe cup-shaped sliding shoe 5, a deviation correcting hydraulic jack 6 and a penetration jacking hydraulic jack 7 are assembled into a rolling friction type walking pushing device suitable for pushing and installing bridge sections.
Realizing the longitudinal pushing and installing function of the bridge body: two parallel vertical support plates 10 are welded below the platform plate 8 of the movable platform car 3 along the longitudinal pushing direction, and triangular stiffening rib plates 9 are welded at the outer sides of the joints for reinforcement. A pair of lateral limiting rollers 13 are arranged on the outer side of each vertical supporting plate 10, a pair of steel cylindrical shafts 14 are welded perpendicular to the side plate surfaces, a half of steel sleeve 15 cut off in the radial direction is manufactured to be in a first half section and rotates around the steel cylindrical shafts 14, a long handle 16 is welded at the end of the steel sleeve 15, the rotary handle is convenient to drive the steel sleeve 15 to clamp the clamping plate 21 of the groove-type walking track tray 1 to lock the pushing position, the movable platform truck 3 is prevented from sliding backwards when a longitudinal slope bridge is pushed, a roller horizontal bearing plate 11 is welded and fixed between the two vertical supporting plates 10, and a plurality of rollers 12 are placed under the horizontal bearing plate 11 through chain plates in series connection, so that the movable platform truck 3 can roll and walk under heavy load. The groove-shaped walking track tray 1 is formed by welding a bottom plate, side plates and end plates, the lengths of the bottom plate and the side plates are manufactured according to the length of a mobile platform car 3 and the pushing stroke length, the widths of the bottom plate and the end plates are equal to the widths of lateral limit rollers 13 on two sides of the rolling mobile platform 3 and are reserved with gaps of 1-3 mm, the heights of the side plates and the end plates are processed according to the height of the root parts of stiffening rib plates 9 lower than the platform plate 8, the upper surfaces of the two side plates in the pushing stroke length range are processed into tooth-shaped clamping plates 21, the steel cylinder shafts 14 are welded on the surfaces of the vertical side plates, and a semisteel pipe stretched out by a steel sleeve 15 sleeved on the steel cylinder shafts 14 can be just clamped in the tooth-shaped clamping plates 21 for locking under the operation of a welding handle 16. The long-stroke pushing jack 2 is fixed with one side end plate of the groove-shaped walking track tray 1 by an end surface flange plate. The mouth-shaped steel plate box 18 can be fixed with round holes at the end parts of two vertical support plates 10 of the rolling moving platform car 3 through horizontal bolts 17, and is connected with an oil cylinder single lug plate 20 of the pushing hydraulic jack 2 through a pin shaft 19. The movable platform car 3 placed in the groove-shaped walking track tray 1 is connected and assembled with the long-stroke pushing jack 2 through a pin shaft, and then the bridge beam body placed on the movable platform car 3 can be longitudinally rolled and pushed.
The realization of the vertical jacking and horizontal deviation correcting functions of the bridge body: the hydraulic jack 7 of the jacking bridge beam body is placed in the steel pipe cup-shaped sliding shoe 5, the steel sleeve 23 of the sliding shoe 5 is closely sleeved on the lower portion of the hydraulic jack 7, a pair of lug plates 29 with pin holes are welded on the steel sleeve 23, a rectangular steel bottom plate 25 is welded on the bottom of the steel sleeve 23, and the length and the width are equal to the outer diameter of the steel sleeve 23. The positioning disc 26 in the penetrating jack 7 is fixed above the rectangular steel bottom plate 25 by bolts, the engineering plastic alloy sliding plate 28 is fixed below the rectangular steel bottom plate 25 by countersunk bolts 27, and grooves are formed in the bottom surface of the sliding plate 28 and can be filled with lubricating oil. The steel plate box 4 is formed by welding four steel plate side plates and a bottom plate, the length of the inner side of the steel plate box 4 is equal to the length of the steel pipe cup-shaped sliding shoes 5 plus the transverse correction amount, the width of the inner side of the steel plate box 4 is slightly larger than the width of the steel pipe cup-shaped sliding shoes 5, bolt holes are reserved in the position, corresponding to the platform plate 8 of the mobile platform car 3, of the bottom plate of the steel plate box 4, and the mirror surface stainless steel plate 23 spot-welded on the bottom plate of the steel plate box 4, the bottom plate of the steel plate box 4 and the platform plate 8 of the mobile platform car 3 are connected and fixed together through a plurality of bolts 23. The hydraulic jack 6 for correcting deviation is fixed on a transverse side plate orthogonal to the pushing direction of the steel plate box 4, and a telescopic oil cylinder of the jack 6 is in pin shaft connection with the lug plate 29 on the steel sleeve of the steel pipe cup-shaped sliding shoe 5. The hydraulic jacking jack 7 placed in the steel pipe cup-shaped sliding shoe 5 can jack up the bridge body, the steel plate cup-shaped sliding shoe 5 placed in the steel plate box 4 and the jacking jack 7 placed in the sliding shoe 5 can transversely slide and move under the drive of the deviation correcting hydraulic jack 6 fixed on the steel plate box 4, and fine adjustment and deviation correction of the pushing direction during pushing the bridge body are achieved.
The foregoing is merely a preferred embodiment of the present invention, but the present invention is not limited thereto, and any changes and substitutions easily contemplated by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
Claims (2)
1. The rolling friction type walking pushing device for bridge segment installation is characterized by comprising a groove type walking track tray (1) formed by combining and welding peripheral side plates and a bottom plate, a long-stroke pushing hydraulic jack (2) fixed on a side plate orthogonal to the pushing direction of the tray, a rolling moving platform truck (3) arranged in the tray and connected with a pin shaft of the pushing hydraulic jack, a steel plate box (4) arranged and fixed on the rolling moving platform truck (3), a steel plate cup-shaped sliding shoe (5) arranged in the steel plate box (4) and connected with a transverse deviation correcting hydraulic jack (6) pin shaft fixed on the side plate orthogonal to the pushing direction of the steel plate box, and a jacking hydraulic jack (7) arranged in the steel plate cup-shaped sliding shoe;
a plurality of triangular stiffening rib plates (9) are arranged below the platform plate (8) of the rolling moving platform car (3) and are welded and reinforced with the vertical supporting plates (10), so that the eccentric load resistance of the platform plate (8) in the transverse deviation correction is improved; a plurality of rows of rollers (12) connected with a plurality of chain plates are placed below a roller horizontal bearing plate (11) which is transversely and welded and fixed on a vertical bearing plate (10), so that a rolling friction movement mode of the platform truck under heavy load is realized; the front and back of the outer side of the lower vertical supporting plate (10) of the platform plate (8) are respectively provided with 1 pair of lateral limiting rollers (13) which are clamped in the groove-type walking track tray (1), a single-side gap of 1-3 mm is reserved, and the rolling moving platform car (3) is limited to do directional linear reciprocating movement in the pushing stroke;
a pair of steel cylindrical shafts (14) are welded on the outer sides of the vertical support plates (10) and perpendicular to the side plate surfaces within the range of travel of the pushing hydraulic jack, a front half section of steel sleeve (15) which is cut off in the radial direction is arranged on the shafts and can rotate around the steel cylindrical shafts (14), and a rotating angle of a welding handle (16) at the end of each steel sleeve (15) can be adjusted to enable the cut-off half steel sleeve (15) to be clamped into the clamping plate (21) teeth of the groove-type walking track tray (1) to carry out clamping locking pushing positions, so that the mobile platform car is prevented from sliding backwards; the long-stroke cylinder single-lug plate (20) of the long-stroke pushing hydraulic jack (2) fixed on the vertical end plate of the groove-type walking track tray (1) is connected with a pin shaft (19) inserted into a top plate hole of the mouth-shaped steel plate box (18) through two horizontal bolts (17) between two vertical support plates (10) at one end of the rolling moving platform car (3) and screwed into the side plate of the mouth-shaped steel plate box (18) and can rotate;
the steel plate box (4) placed and fixed on the platform plate (8) of the rolling platform car (3) is formed by welding side plates of surrounding steel plates and a bottom plate, a mirror surface stainless steel plate (22) is fixed on the bottom plate in the steel plate box (4) to serve as a sliding plate, the net length of the inner side of the steel plate box (4) orthogonal with the longitudinal pushing of a bridge is equal to the sum of the length of a steel pipe cup-shaped sliding shoe (5) placed in the box and the transverse correction positive and negative quantity, and the net length of the inner side of the steel plate box (4) in the longitudinal pushing direction is slightly larger than the width of the steel pipe cup-shaped sliding shoe (5); the bottom plate of the steel plate box (4) is fixed with a platform plate (8) of the rolling mobile platform car (3) by a plurality of bolts (23) to form a detachable connection mode;
the long-stroke pushing hydraulic jack (2) placed in the steel pipe cup-shaped sliding shoe (5) directly utilizes the bridge prestress tensioning through hydraulic jack, a steel pipe (24) of the steel pipe cup-shaped sliding shoe is welded and fixed with a rectangular steel bottom plate (25), a positioning disc (26) in the through jack is fixed above the rectangular steel bottom plate (25) through bolts, an engineering plastic alloy sliding plate (28) is fixed below the rectangular steel bottom plate through countersunk bolts (27), and an ear plate (29) connected with a transverse deviation correcting hydraulic jack (6) through a pin shaft is connected to the outer side wall of the steel pipe (24) of the sliding shoe; and a bearing steel plate (30) with a positioning circular plate is arranged at the top of the jacking hydraulic jack (7) to form a lifting steel platform for supporting the bridge girder body.
2. The rolling friction type walking pushing device installed on the bridge segment according to claim 1, wherein the length of the groove type walking track tray (1) is equal to the length of the rolling moving platform car (3) plus the pushing stroke length, and the width is equal to the width between lateral limit rollers at two sides of the rolling moving platform plus a reserved gap; the heights of steel plates at two longitudinal sides of the groove-shaped walking track tray (1) are lower than the root heights of stiffening rib plates (9) of the platform plate (8), and the tooth-shaped pushing position locking clamping plates (21) are processed in the pushing stroke length range of the groove-shaped walking track tray (1).
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| CN201910053360.0A CN109736212B (en) | 2019-01-21 | 2019-01-21 | Rolling friction type walking pushing device for bridge segment installation |
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| CN201910053360.0A CN109736212B (en) | 2019-01-21 | 2019-01-21 | Rolling friction type walking pushing device for bridge segment installation |
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| CN109736212B true CN109736212B (en) | 2023-09-19 |
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| CN203821245U (en) * | 2014-04-26 | 2014-09-10 | 中铁四局集团第四工程有限公司 | Steel pipe arch rib pushing movement roller box |
| CN205113611U (en) * | 2015-10-19 | 2016-03-30 | 天津市三枪电动车有限公司 | Swift current car structure is prevented to manual control tricycle |
| CN205916148U (en) * | 2016-06-29 | 2017-02-01 | 马鞍山钢铁股份有限公司 | Swift current device is prevented to metallurgical vehicle |
| CN206644822U (en) * | 2017-04-01 | 2017-11-17 | 中建隧道建设有限公司 | Tunnel battery truck |
| CN108035263A (en) * | 2018-01-20 | 2018-05-15 | 海宁天悦电子有限公司 | A kind of thrustor for bridge construction |
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| CN109736212A (en) | 2019-05-10 |
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Effective date of registration: 20230918 Address after: Room 403, Building 4, Chenxiyuan, Dongfangcheng, Xuanwu District, Nanjing City, Jiangsu Province, 210042 Applicant after: Guo Zhengxing Applicant after: NANJING DONGZHINAN ENGINEERING TECHNOLOGY CO.,LTD. Applicant after: ZHONGYIFENG CONSTRUCTION GROUP Co.,Ltd. Address before: Room 403, Building 4, Chenxiyuan, Dongfangcheng, Xuanwu District, Nanjing City, Jiangsu Province, 210042 Applicant before: Guo Zhengxing Applicant before: ZHONGYIFENG (SUZHOU) GREEN ARCHITECTURAL DEVELOPMENT Co.,Ltd. Applicant before: NANJING DONGZHINAN ENGINEERING TECHNOLOGY CO.,LTD. |