CN202012045U - Combined steel frame structure for jacking in underpass bridge - Google Patents
Combined steel frame structure for jacking in underpass bridge Download PDFInfo
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- CN202012045U CN202012045U CN2011200421869U CN201120042186U CN202012045U CN 202012045 U CN202012045 U CN 202012045U CN 2011200421869 U CN2011200421869 U CN 2011200421869U CN 201120042186 U CN201120042186 U CN 201120042186U CN 202012045 U CN202012045 U CN 202012045U
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Abstract
The utility model provides a combined steel frame structure for jacking in an underpass bridge. The combined steel frame structure comprises a quadrangular main frame and subframes at the upper front part of the main frame. The quadrangular main frame is integrally formed by fastening and connecting an upright rectangular frame, an upper longitudinal joist, a horizontal top crossbeam and a spacing beam at the top, and a lower longitudinal joist and a horizontal bottom crossbeam at the bottom via bolts. The underpass bridge is excavated by the following steps of enabling the subframes to be jacked at intervals, so as to reduce the resistance and the disturbance to the soil during the jacking process; enabling the quadrangular main frame to be jacked; excavating and conveying out soils of an excavated surface under the support and shield of the subframes and the main frame; performing the jacking operation repeatedly; and dismounting the combined steel frame structure at the front end until the reinforced concrete underpass bridge is jacked to a desired position. The combined steel frame structure can be assembled for jacking in underpass bridges or culverts with different sections, and the repeated application greatly saves steel materials and construction cost. The utility model can guarantees balance earth pressure, stable excavated surface, safe operation, limit line speed reduction, and decrease in influence on transportation.
Description
Technical field
The utility model relates to a kind of equipment method of tunneling railway or highway subgrade ground bridge, the combined frame steel structure of particularly a kind of jacking ground bridge.
Background technology
Along with the frequent speed-raising of domestic railway, there is a large amount of level crossings need reconstruct into the form of grade separation, and more adopts down the mode of wearing grade separation, for not cutting off traffic, adopt pipe jacking method more; Be about to ground bridge or the jacking of culvert pipe of prefabricated Rectangular Concrete and pass the roadbed of existing railway or highway, so that automobile, pedestrian, pipeline, cable grade separation pass through.In the construction, prefabricated Rectangular Concrete ground bridge needs ceaselessly earth is dug out to continue jacking when the dirt bed jacking of roadbed; In order to keep the operation of upper strata railway or highway, method is to adopt i iron, just reinforcement measure or limiting operation such as beam in traditional construction, and the time-consuming reinforcement means of this effort can not satisfy the high-speed railway of continuous speed-raising and the requirement of speedway operation.In the later stage, the shield structure technology that is used to tunnel the ground bridge is with its safety, efficiently more and more widely used, but existing shield structure is integrally welded, and a kind of shield structure of specification can only be applied to the genuine bridge construction that adapts with its design section, does not have versatility; The ground bridge of driving different section need design the new shield structure of processing, has increased construction cost.
The utility model content
The purpose of this utility model provides the combined frame steel structure of a kind of jacking ground bridge, can be applicable to the ground bridge or the culvert of jacking different section by assembling.
The technical solution of the utility model is: the combined frame steel structure of a kind of jacking ground bridge, and framework steel structure is positioned at by the front end of the square steel concrete ground bridge of hydraulic jack jacking; Upright rectangle munnion frame relies on the vertically joist and laterally cross member down vertically going up joist and horizontal head piece, spaced-apart beams and be positioned at the bottom that is positioned at the top, by the bolton connection, is combined into whole square master frame structure; Described upright rectangle munnion frame is 2-12, and appearance and size is identical, the side is parallel to each other, upper front end turns forward, the steel framework that front end reclines, spacing is uniform of rear end and described square steel concrete ground bridge; The native steel plate of shelves is equipped with in end face and two sides at the square master frame structure of described integral body, and the upper front end that turns forward at the square master frame structure of integral body, laterally a row is installed mutually near, sub-frame structure that can slippage in the front of head piece; Sub-frame structure is the small rectangle steel framework, and front end is provided with tooth plate, two pipe bending cylinders that the fastening installation of small rectangle steel framework inner chamber is arranged side by side, and the piston rod of pipe bending cylinder withstands horizontal head piece.
Adopt the method for the combined frame steel structure jacking ground bridge of a kind of jacking ground bridge, the steps include:
[1] the rectangle munnion frame of the design size choice criteria specification of base area bridge, last joist, head piece, spaced-apart beams, following joist and cross member, rectangle munnion frame quantity and spacing is selected in the width of base area bridge and the load on upper strata, with bolt combination square master frame structure is installed in the open-air trench that bridge one side in ground is dug in advance; The appearance and size of square master frame structure rear end face is identical with the peripheral size of square steel concrete ground bridge and ground bridge.
[2] in the end face and the two sides of the square master frame structure of integral body the native steel plate of shelves is housed, the upper front end that turns forward at the square master frame structure of integral body, laterally a row is installed mutually near, sub-frame structure that can slippage in the front of head piece.
[3] dock with the axis of the front end edge ground bridge of square steel concrete ground bridge the rear end of Zheng Ti square master frame structure, in the rear end of square steel concrete ground bridge hydraulic jack and supporting oil piping system is installed.
[4] lay the drag reduction steel plate at the end face of square steel concrete ground bridge, the front end of drag reduction steel plate is connected with sub-frame structure by cable wire, and the rear end of drag reduction steel plate relies on cable wire to be connected with the anti-adjusting oil cylinder that draws; The supporting oil piping system of pipe bending cylinder of regulating oil cylinder and sub-frame structure is installed.The frictional resistance that the drag reduction steel plate can become the concrete and the soil body is the frictional resistance between the steel plate and the soil body, the resistance when reducing jacking and to the disturbance of the soil body; The drag reduction front edge of board is arranged on the sub-frame structure, advances with sub-frame structure interval jacking.The drag reduction postlaminar part is connected on the anti-pull system jack that is fixed in the frame bridge rear portion, when the whole jacking of frame structure moves forward, if taking place, frame strip breaks ground body when producing along horizontal mobile of existing line, then start the anti-adjusting oil cylinder that draws the reverse same rate of drag reduction steel plate is retracted, the soil body is not by disturbance to guarantee the frame bridge jacking.
[5] start the hydraulic jack of bridge rear end, square steel concrete ground, pushing tow combined frame steel structure makes the tooth plate of sub-frame structure insert the excavation face of ground bridge, excavation and transport the part earth of excavation face under the shielding of sub-frame structure; Along with the propelling and the expansion of not screening area of excavation face, the pipe bending cylinder of compartment of terrain promoter frame structure, promptly have only not near half sub-frame structure tooth plate insert the excavation face earlier, second half sub-frame structure tooth plate of pushing tow more subsequently; Excavate and transport the part earth of excavation face under the shielding of the sub-frame structure after the propelling, restart hydraulic jack, pushing tow square steel concrete ground bridge and combined frame steel structure draw the pipe bending cylinder of sub-frame structure simultaneously in.Before each circulation jacking square master frame structure, the sub-frame structure of compartment of terrain jacking at first, in the time of can reducing jacking to the disturbance of the soil body, and when reducing jacking with vertical frictional resistance on former soil body top, thereby the maintenance existing line is linear.Repeat above-mentioned work cycle, promote comprehensively continuously combined frame steel structure and square steel concrete ground bridge constantly excavate and transport the earth of excavation face under the shielding of the sub-frame structure after the propelling.
[6] after square steel concrete ground bridge is pushed up design attitude, the combined frame steel structure of front end is removed, finished the jacking construction of ground bridge.
The beneficial effects of the utility model are:
1, is arranged at the combined frame steel structure support side of frame bridge front end and soil pressure and the vehicular load that the top is transmitted, main frame structure upper front end turns forward and thereon sub-frame of position is configured to the advance support of excavation face, makes the excavation face form a stable side slope; Under combined frame steel structure supports and screens, excavate and transport the part earth of excavation face, guarantee earth pressure balance, stable, the job safety of excavation face, can reduce or cancel speed restriction, reduce influence greatly communications and transportation to transportation route.
2, combined frame steel structure has versatility, can be assembled into the ground bridge or the culvert that are applicable to the jacking different section, and repeated use can be saved steel and construction cost greatly.
Description of drawings
Fig. 1 is the structural representation of combined frame steel structure.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is the structural representation of sub-frame structure.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the construction schematic diagram of jacking combined frame steel structure and ground bridge.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment 1 is shown in accompanying drawing 1-5: the combined frame steel structure of a kind of jacking ground bridge, and framework steel structure is positioned at by the front end of the square steel concrete ground bridge of hydraulic jack jacking; Upright rectangle munnion frame 1 relies on the vertically joist 7 and laterally cross member 8 down vertically going up joist 2 and horizontal head piece 3, spaced-apart beams 6 and be positioned at the bottom that is positioned at the top, by the bolton connection, is combined into whole square master frame structure; Described upright rectangle munnion frame 1 is six, and appearance and size is identical, the side is parallel to each other, upper front end turns forward, the steel framework that front end reclines, spacing is uniform of rear end and described square steel concrete ground bridge 11; The native steel plate 4 of shelves is equipped with in end face and two sides at the square master frame structure of described integral body, and the upper front end that turns forward at the square master frame structure of integral body, laterally a row is installed mutually near, sub-frame structure 5 that can slippage in the front of head piece 3; Sub-frame structure 5 is the small rectangle steel framework, and front end is provided with tooth plate 9, two pipe bending cylinders 10 that the fastening installation of small rectangle steel framework inner chamber is arranged side by side, and the piston rod of pipe bending cylinder 10 withstands horizontal head piece 3.
[1] the rectangle munnion frame 1 of the design size choice criteria specification of base area bridge, last joist 2, head piece 3, spaced-apart beams 6, following joist 7 and cross member 8, rectangle munnion frame 1 quantity and spacing is selected in the width of base area bridge and the load on upper strata, with bolt combination square master frame structure is installed in the open-air trench that bridge one side in ground is dug in advance; The appearance and size of square master frame structure rear end face is identical with the peripheral size of square steel concrete ground bridge 11 and ground bridge.
[2] in the end face and the two sides of the square master frame structure of integral body the native steel plate 4 of shelves is housed, the upper front end that turns forward at the square master frame structure of integral body, laterally a row is installed mutually near, sub-frame structure 5 that can slippage in the front of head piece 3.
[3] dock with the axis of the front end edge ground bridge of square steel concrete ground bridge 11 rear end of Zheng Ti square master frame structure, in the rear end of square steel concrete ground bridge 11 hydraulic jack 12 and supporting oil piping system is installed.
[4] lay the drag reduction steel plate at the end face of square steel concrete ground bridge 11, the front end of drag reduction steel plate is connected with sub-frame structure 5 by cable wire, and the rear end of drag reduction steel plate relies on cable wire to be connected with the adjusting oil cylinder; Install to regulate the supporting oil piping system of pipe bending cylinder 10 of oil cylinder and sub-frame structure.The frictional resistance that the drag reduction steel plate can become the concrete and the soil body is the frictional resistance between the steel plate and the soil body, the resistance when reducing jacking and to the disturbance of the soil body; The drag reduction front edge of board is arranged on the sub-frame structure, advances with sub-frame structure interval jacking.The drag reduction postlaminar part is connected on the anti-pull system jack that is fixed in the frame bridge rear portion, when the whole jacking of frame structure moves forward, if taking place, frame strip breaks ground body when producing along horizontal mobile of existing line, then start the anti-adjusting oil cylinder that draws the reverse same rate of drag reduction steel plate is retracted, the soil body is not by disturbance to guarantee the frame bridge jacking.
[5] start the hydraulic jack 12 of bridge 11 rear ends, square steel concrete ground, pushing tow combined frame steel structure makes the tooth plate 9 of sub-frame structure insert the excavation face 13 of ground bridges, excavation and transport the part earth of excavation face 13 under the shielding of sub-frame structure 5; Along with the propelling of excavation face 13 and the expansion of not screening area, the pipe bending cylinder 10 of compartment of terrain promoter frame structure, promptly have only not near half sub-frame structure tooth plate 9 insert excavation faces 13 earlier, second half sub-frame structure tooth plate 9 of pushing tow more subsequently; Excavate and transport the part earth of excavation face 13 under the shielding of the sub-frame structure 5 after the propelling, restart hydraulic jack 12, pushing tow square steel concrete ground bridge 11 and combined frame steel structure draw the pipe bending cylinder 10 of sub-frame structure simultaneously in.Before each circulation jacking square master frame structure, the sub-frame structure of compartment of terrain jacking at first, in the time of can reducing jacking to the disturbance of the soil body, and when reducing jacking with vertical frictional resistance on former soil body top, thereby the maintenance existing line is linear.Repeat above-mentioned work cycle, promote comprehensively continuously combined frame steel structure and square steel concrete ground bridge 11 constantly excavate and transport the earth of excavation face 13 under the shielding of the sub-frame structure 5 after the propelling.
[6] after square steel concrete ground bridge 11 is pushed up design attitude, the combined frame steel structure of front end is removed, finished the jacking construction of ground bridge.
Claims (1)
1. the combined frame steel structure of jacking ground bridge, framework steel structure is positioned at by the front end of the square steel concrete ground bridge of hydraulic jack jacking, it is characterized in that: upright rectangle munnion frame (1) relies on the vertically joist (7) and laterally cross member (8) down vertically going up joist (2) and horizontal head piece (3), spaced-apart beams (6) and be positioned at the bottom that is positioned at the top, connect by bolton, be combined into whole square master frame structure; Appearance and size is identical, the side is parallel to each other, upper front end turns forward, the steel framework that front end reclines, spacing is uniform of rear end and described square steel concrete ground bridge (11) for 2-12 for described upright rectangle munnion frame (1); A shelves native steel plate (4) is equipped with in end face and two sides at the square master frame structure of described integral body, and the upper front end that turns forward at the square master frame structure of integral body, laterally a row is installed mutually near, sub-frame structure (5) that can slippage in the front of head piece (3); Sub-frame structure (5) is the small rectangle steel framework, and front end is provided with tooth plate (9), two pipe bending cylinders (10) that the fastening installation of small rectangle steel framework inner chamber is arranged side by side, and the piston rod of pipe bending cylinder (10) withstands horizontal head piece (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200421869U CN202012045U (en) | 2011-02-21 | 2011-02-21 | Combined steel frame structure for jacking in underpass bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200421869U CN202012045U (en) | 2011-02-21 | 2011-02-21 | Combined steel frame structure for jacking in underpass bridge |
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| Publication Number | Publication Date |
|---|---|
| CN202012045U true CN202012045U (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200421869U Expired - Fee Related CN202012045U (en) | 2011-02-21 | 2011-02-21 | Combined steel frame structure for jacking in underpass bridge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108679A (en) * | 2011-02-21 | 2011-06-29 | 李家稳 | Combined framework steel structure of jacked subway bridge and method for jacking subway bridge |
| CN103015335A (en) * | 2012-12-28 | 2013-04-03 | 中铁二十四局集团有限公司 | Pre-penetrating limiting beam jacking method |
| CN110439569A (en) * | 2019-08-06 | 2019-11-12 | 中建一局集团建设发展有限公司 | A kind of slideway system and its construction method for frame jacking |
| CN110924436A (en) * | 2019-12-19 | 2020-03-27 | 沈阳铁道勘察设计院有限公司 | Railway frame bridge jacking front guide type steel box shed edge angle and construction method thereof |
-
2011
- 2011-02-21 CN CN2011200421869U patent/CN202012045U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108679A (en) * | 2011-02-21 | 2011-06-29 | 李家稳 | Combined framework steel structure of jacked subway bridge and method for jacking subway bridge |
| CN103015335A (en) * | 2012-12-28 | 2013-04-03 | 中铁二十四局集团有限公司 | Pre-penetrating limiting beam jacking method |
| CN103015335B (en) * | 2012-12-28 | 2015-07-01 | 中铁二十四局集团有限公司 | Pre-penetrating limiting beam jacking method |
| CN110439569A (en) * | 2019-08-06 | 2019-11-12 | 中建一局集团建设发展有限公司 | A kind of slideway system and its construction method for frame jacking |
| CN110924436A (en) * | 2019-12-19 | 2020-03-27 | 沈阳铁道勘察设计院有限公司 | Railway frame bridge jacking front guide type steel box shed edge angle and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20130221 |