CN203256626U - Bridge jacking system - Google Patents
Bridge jacking system Download PDFInfo
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- CN203256626U CN203256626U CN 201320202862 CN201320202862U CN203256626U CN 203256626 U CN203256626 U CN 203256626U CN 201320202862 CN201320202862 CN 201320202862 CN 201320202862 U CN201320202862 U CN 201320202862U CN 203256626 U CN203256626 U CN 203256626U
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- jacking
- jacking system
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Abstract
The utility model discloses a bridge jacking system which comprises jack sets and a steel supporting system. The jack sets are installed at the bottom of a bridge structure which needs to be jacked, and the steel supporting system is correspondingly arranged under the jack sets. Pistons of the jack sets are arranged downwards. According to the bridge jacking system, the jack sets conduct alternating circulation jacking, the compression amount of the steel supporting system is removed at any moment, when pressure relief is carried out on any jack set, the other jack set begins to conduct cylinder stretching and jacking at the same time, and the problem of the relative height difference among supporting points is solved. Meanwhile, when the emergency situation that hydraulic pressure of quite few jacks loses efficacy occurs, the difference of level does not exist in falling of the upper heavy loading objects due to the fact that the supporting compression amount is removed, the load underpinning is instantly completed, safety of the upper heavy loading objects is effectively ensured, therefore, the structural safety in the process of jacking is effectively ensured, the jacked bridge structure can achieve jacking, slope varying, descending and deviation rectifying according to the procedure preconceived by people, the design posture is achieved, and the effect that after the jacking, the use function of the bridge structure is not reduced is achieved.
Description
Technical field
The utility model belongs to the bridge jacking technical field of construction, particularly a kind of bridge jacking system.
Background technology
In bridge construction process; need to control each place, pier position (place, summit) displacement difference for the jacking of continuous girder bridge; the gap protection system of conventional configuration; when jack is switched to temporary supporting in the jacking process; because of the compressive strain of supporting steel pipe and connect the gap; top beam body also can sink with the receipts cylinder of jack; deflection is uncontrollable; the displacement difference that is each pier position also is difficult to control; beam is known from experience produced larger subsidiary stress; therefore, need adopt an effective measure and guarantee in whole jacking process control to the fulcrum displacement.
Traditional continuous girder bridge jack-up construction relatively is difficult to solve the decrement of the steel supporting system system of steel lip block, and the emergency situations that lost efficacy as jack occurs causes jack-up system and superstructure to have hidden danger.
The utility model content
The purpose of this utility model just is to provide a kind of bridge jacking system, thereby realizes that the alternative expression jacking guarantees the structural safety of jack-up system in the jacking process.
The purpose of this utility model realizes by following technical proposals:
A kind of bridge jacking system comprises being arranged on the jack group that needs jacking bridge construction bottom and the corresponding steel supporting system that is arranged under the jack group that the piston of described jack group arranges down.
Further, described steel supporting system is made of a plurality of support bars, a jack in the corresponding jack group of each support bar, this support bar is comprised of the stacked support steel cylinder in some up and down, described support steel cylinder two ends are welded with flange, the stacked support steel cylinder in up and down passes through the bolt concrete mutually, and the adjacent support bar in left and right connects by truss frame for connecting.
Further, described jack group is arranged on the both sides, front and back of the corresponding bridge pier in bridge construction bottom, abutment position.
Further, in the bottom of bridge construction, distribution beam is installed, two groups of jack are arranged on bottom distribution beam.
Further, described distribution beam comprises stringer board and transverse slat, and four mutually vertical orthogonal frameworks of fixing structure of stringer board vertically arrange some transverse slats along the rectangular frame length direction.
Further, described transverse slat equidistantly is fixed on rectangular frame.
Further, described transverse slat passes two stringer boards of forward and backward side.
Further, the parallel stringer board that sets firmly also between two stringer boards of forward and backward side.
The Main Function of this bridge jacking system is the weight of bearing the superstructure bridge box and beam, this system need to consider his bearing capacity, rigidity and stability, when guaranteeing the jacking of beam body, the state of system itself is constant, guarantee that simultaneously the stress of beam body in the jacking process is constant, comprise subsidiary stress, displacement etc.Take internal monitoring data and third party's monitor data to check in the jacking process, the error that in time discovery may occur is guaranteed jacking process central sill body safety.Jacking at the place, shrinkage joint needs to pressurize simultaneously its both sides (bridge is vertical), produces unbalanced moment to avoid the pile foundation of bridge pier top area.
Bridge jacking system can be realized the alternative expression jack-up method, the alternative expression jacking is in the jacking process, the beam body is in the state that two groups of jack alternately support, when two groups of jack alternately support, the beam displacement body all is in controllable state, under each group holding state, the decrement of support system changes hardly, thereby beam body internal force also changes hardly.Under this form of construction work, the beam displacement body begins to finish all to be in continuously slave mode to jacking from jacking.Each jack pressure is equal continuous monitoring states also, therefore can guarantee that the beam body is not damaged in the jacking process, during the whole support system that comprises the beam body is also in the monitoring state.Therefore whole bridge jacking system also is in safe controllable state.
The beneficial effects of the utility model are:
By the alternate cycles jacking of jack group, eliminated at any time the decrement of steel supporting system, in the time of any jack group release therein, another jack group has begun to stretch the cylinder jacking, has eliminated the discrepancy in elevation problem between each strong point.Simultaneously, the emergency situations that lost efficacy as extremely indivedual jack hydraulics occur, the top heavy loading object falls to having eliminated because of the support decrement has not had drop, load underpins at once and completes, effectively guaranteed the safety of top heavy loading object, thereby also effectively guarantee the structural safety in jacking, and make the bridge construction of jacking realize by the program of people anticipation rising, become slope, decline, correction, do not reduce the effect that bridge construction is used function after reaching jacking.
Description of drawings
Fig. 1 is positive facade structural representation of the present utility model;
Fig. 2 is side elevation structural representation of the present utility model;
Fig. 3 is the structural representation of distribution beam in the utility model;
Fig. 4 is the left view of Fig. 3.
The specific embodiment
Below in conjunction with specific embodiments and the drawings, the utility model is further described.
As depicted in figs. 1 and 2, a kind of bridge jacking system comprises that the first jack group 1a, the second jack group 1b and correspondence are arranged on two groups of steel supporting systems under the jack group, and the piston of described jack group arranges down.Two side positions are installed 4, two groups of jack groups of distribution beam and are arranged on distribution beam 4 bottoms before and after the need jacking bridge construction 3 corresponding bridge piers in bottoms, abutment.
Described steel supporting system is made of a plurality of support bars, a jack in the corresponding jack group of each support bar, this support bar is comprised of the stacked support steel cylinder 5 in some up and down, described support steel cylinder 5 two ends are welded with flange 7, the stacked support steel cylinder 5 in up and down passes through the bolt concrete mutually, and the adjacent support bar in left and right connects by truss frame for connecting 6.
As shown in Figure 3 and Figure 4, described distribution beam 4 comprises end face stringer board 41, bottom surface stringer board 42, front side stringer board 43, rear side stringer board 44 and transverse slat 45, end face stringer board 41, front side stringer board 43, bottom surface stringer board 42, the rear side stringer board 44 mutual vertical weldings of these four stringer boards consist of rectangular frame, along the some transverse slats 54 of the vertical equidistantly welding of rectangular frame length direction, and described transverse slat 45 passes front side stringer board 43 and rear side stringer board 44.
Be intensity, rigidity and the stability that strengthens this distribution beam, stringer board 46 in the middle of the parallel welding one in the middle part between front side stringer board 43 and rear side stringer board 44.
In use, the end face stringer board 41 of this distribution beam is weldingly fixed on the pre-embedded steel slab 8 of bridge construction 3 bottoms, directly bear top bridge construction 3 weight, the first jack group 1a and the second jack group 1b are arranged on the bottom surface stringer board 42 of distribution beam 4 bottoms, by distribution beam 4, power is transferred to two groups of jack like this, effectively dissipation of ferees, guarantee that jacking process Bridge structure 3 is indeformable, guarantees construction safety.
The arrangement principle of above-mentioned support steel cylinder 5 is, adopts the highest support steel cylinder principle (being that first support steel cylinder adopts peak) before jacking, and existing to support the steel cylinder specification be 5m, 4m, 3m, 2m, 1m.First support steel cylinder adopts 5m, the jacking section adopts 1m to save as jacking, fixed by connecting bolt between the support steel cylinder that the stacked pad in up and down is established, and every two support steel cylinders adopt the connector that square steel is connected with steel plate to connect as conversion as one group up and down, the side of connector, top and bottom connect into truss type with angle steel, consist of truss frame for connecting by the connecting rod reinforcement by connection between the adjacent support steel cylinder in left and right.
Above-mentioned two groups of jack all are equipped with safety valve and equalizing valve.Even safety valve can guarantee to occur the catastrophic failure, outage of oil supply system and oil return system etc., two groups of jack also can keep due pressure.In the case beam, outside top lift amount is inconsistent, adopts equalizing valve to regulate on jack and controls jack top lift balance, the poor supporting capacity of jack that can not exceed of inside and outside top power own.After the balance valve, no matter oil cylinder rises or descends, and is all by oil-feed flow-control cylinder movement speed, and irrelevant with the oil cylinder load.The present system of the hydraulic control one-way valve that uses of tradition, oil cylinder will use the speed governing of back pressure choke valve when descending, and decrease speed is subjected to the oil cylinder load effect, and during greater than the oil pump feed flow, hydraulic control one-way valve just can shake, and is very dangerous when decrease speed.Because be the back pressure throttle grverning, if broken pipe situation occurs, hydraulic control one-way valve can't keep oil cylinder decline safety, and the system of balance valve, because of oil return pipe without pressure, so but oil cylinder safely dropping still during broken pipe.
For selecting of jack:
1, each bridge pier of bridge, the beam body that abutment bears are weighed, clear and definite each bridge pier, abutment bear the load of beam body.
2, the position, both sides of each bridge pier, abutment arranges two groups of hydraulic jack and becomes the slope ratio and replace jacking, and the quantity of every group of jack is set to even number.
3, should select little tonnage jack so that the attitude adjustment in installation and jacking process, each group jack full payload amount of bearing is greater than more than 2 times of beam body load weight that each bridge pier or abutment bear, if to guarantee that generation was changed when wherein a jack loses efficacy in the jacking process, avoid bridge construction and support system are impacted.
4, jack must be furnished with hydraulic lock and mechanical lock, preventing any type of system and pipeline decompression, thus effective support of proof load.
Jack should guarantee that the axis of jack is vertical when installing, and produces horizontal component in order to avoid install to be tilted in the jacking process because of jack.In the jacking process, because the elongation of beam body can make jack misalignment centre of support, jack need to be adjusted the centering centre of support, during Rotation of beam, jack has rotation simultaneously, need to increase wedge leveling jack at the jack afterbody simultaneously.
When using this bridge jacking system to carry out jack-up construction to bridge, drive the jacking of two groups of jack alternate cycles by console by hydraulic power unit, eliminated at any time the decrement of the steel supporting system that supports the steel cylinder formation, in the time of any jack group release therein, another jack group has begun to stretch the cylinder jacking, has eliminated the discrepancy in elevation problem between each strong point.Simultaneously, as the emergency situations that jack lost efficacy occurs, the top heavy loading object falls to having eliminated because of the support decrement has not had drop, load underpins at once and completes, effectively guaranteed the safety of top heavy loading object, thereby also effectively guarantee the structural safety in jacking, and make the bridge construction of jacking realize by the program of people anticipation increasing, become slope, correction, reach the effect that does not reduce bridge construction use function after jacking.
The jacking process is as follows: in the jacking process of first jack group 1a/ the second jack group 1b, corresponding piston lower end at second jack group 1b/ the first jack group 1a progressively adds pading plate, bolt between steel plate, steel plate with support that between steel cylinder 5, bolt is connected, when preventing the jack inefficacy, the beam body falls suddenly, two groups of jack replace jacking until after 3 one strokes of jacking bridge construction, take out steel plate and use support steel cylinder 5 to replace steel plates.This mode can guarantee that braced structures has good globality, prevents because of the contingent slippage of bridge jacking, and then causes the unstable failure of support system.
In the jacking process, the variation of beam body longitudinal gradient causes the variation of beam length projected length, and the jack and the support that cause being arranged at the bottom of beam can cause relative displacement, in the jacking process, employing jack bottom arranges removable adjusting device, constantly regulate the lengthwise position of jack, guarantee that the situation of eccentric compression does not appear in support system.
The above is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. bridge jacking system is characterized in that: comprise being arranged on the jack group that needs jacking bridge construction bottom and the corresponding steel supporting system that is arranged under the jack group, the piston of described jack group all arranges down.
2. bridge jacking system according to claim 1, it is characterized in that: described steel supporting system is made of a plurality of support bars, a jack in the corresponding jack group of each support bar, this support bar is comprised of the stacked support steel cylinder in some up and down, described support steel cylinder two ends are welded with flange, the stacked support steel cylinder in up and down passes through the bolt concrete mutually, and the adjacent support bar in left and right connects by truss frame for connecting.
3. bridge jacking system according to claim 2 is characterized in that: described jack group is arranged on the both sides, front and back of the corresponding bridge pier in bridge construction bottom, abutment position.
4. bridge jacking system according to claim 3 is characterized in that: distribution beam is installed in the bottom in bridge construction, and two groups of jack are arranged on the distribution beam bottom.
5. bridge jacking system according to claim 4, it is characterized in that: described distribution beam comprises stringer board and transverse slat, four mutually vertical orthogonal frameworks of fixing structure of stringer board vertically arrange some transverse slats along the rectangular frame length direction.
6. bridge jacking system according to claim 5, it is characterized in that: described transverse slat equidistantly is fixed on rectangular frame.
7. bridge jacking system according to claim 6, it is characterized in that: described transverse slat passes two stringer boards of forward and backward side.
8. bridge jacking system according to claim 7 is characterized in that: the parallel stringer board that sets firmly also between two stringer boards of forward and backward side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320202862 CN203256626U (en) | 2013-04-22 | 2013-04-22 | Bridge jacking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320202862 CN203256626U (en) | 2013-04-22 | 2013-04-22 | Bridge jacking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203256626U true CN203256626U (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320202862 Expired - Lifetime CN203256626U (en) | 2013-04-22 | 2013-04-22 | Bridge jacking system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405140A (en) * | 2014-11-21 | 2015-03-11 | 上海天演建筑物移位工程股份有限公司 | Jacking support system and jacking support method |
| CN105421251A (en) * | 2015-11-18 | 2016-03-23 | 同济大学 | Plate-girder jacking support mechanism and plate-girder jacking support tool |
| CN106065577A (en) * | 2016-08-08 | 2016-11-02 | 福州轨道交通设计院有限公司 | The structure of a kind of new pile foundation underpinning and method |
| CN106284079A (en) * | 2016-08-08 | 2017-01-04 | 中交三公局桥梁隧道工程有限公司 | A kind of bridge break post replace classification synchronize integral jacking construction method |
| CN112813852A (en) * | 2021-01-05 | 2021-05-18 | 四川交投建设工程股份有限公司 | Repairing and reinforcing method for bridge deck subsidence of in-service bridge |
| CN114237159A (en) * | 2022-02-24 | 2022-03-25 | 深圳市大族光电设备股份有限公司 | Welding arc automatic generation method and device, computer equipment and storage medium |
-
2013
- 2013-04-22 CN CN 201320202862 patent/CN203256626U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405140A (en) * | 2014-11-21 | 2015-03-11 | 上海天演建筑物移位工程股份有限公司 | Jacking support system and jacking support method |
| CN105421251A (en) * | 2015-11-18 | 2016-03-23 | 同济大学 | Plate-girder jacking support mechanism and plate-girder jacking support tool |
| CN105421251B (en) * | 2015-11-18 | 2017-04-05 | 同济大学 | Plate-girder jacking supporting mechanism, plate-girder jacking supporting tool |
| CN106065577A (en) * | 2016-08-08 | 2016-11-02 | 福州轨道交通设计院有限公司 | The structure of a kind of new pile foundation underpinning and method |
| CN106284079A (en) * | 2016-08-08 | 2017-01-04 | 中交三公局桥梁隧道工程有限公司 | A kind of bridge break post replace classification synchronize integral jacking construction method |
| CN106065577B (en) * | 2016-08-08 | 2017-08-25 | 福州轨道交通设计院有限公司 | A kind of structure and method of new pile foundation underpinning |
| CN112813852A (en) * | 2021-01-05 | 2021-05-18 | 四川交投建设工程股份有限公司 | Repairing and reinforcing method for bridge deck subsidence of in-service bridge |
| CN114237159A (en) * | 2022-02-24 | 2022-03-25 | 深圳市大族光电设备股份有限公司 | Welding arc automatic generation method and device, computer equipment and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |