CN202766971U - A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket - Google Patents
A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket Download PDFInfo
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- CN202766971U CN202766971U CN 201120550138 CN201120550138U CN202766971U CN 202766971 U CN202766971 U CN 202766971U CN 201120550138 CN201120550138 CN 201120550138 CN 201120550138 U CN201120550138 U CN 201120550138U CN 202766971 U CN202766971 U CN 202766971U
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- hanging basket
- ground
- hydraulic jack
- continuous beam
- draws
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Abstract
The utility model provides a ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket. The ground counter-pull pre-pressing device is capable of reducing risks of aloft work, is highly practical, realizing flexible and easy loading and deloading and guarantees accuracy of pre-pressing data. The ground counter-pull pre-pressing device comprises hydraulic jacks disposed on the ground and arranged on the two sides of a cantilever beam symmetrically; the hydraulic jacks are connected with steel strands; the other ends of the steel strands are connected to force distributing devices disposed on a bottom plate of the hanging basket; and the force distributing devices comprise cross distribution beams and longitudinal distribution beams which are crossed to form a latticed structure and are stacked and covered on the surface of the bottom plate of the hanging basket uniformly. The ground counter-pull pre-pressing device is capable of reducing risks of the aloft work, is highly practical, realizing flexible and easy loading and deloading and guarantees accuracy of the pre-pressing data.
Description
Technical field
The utility model relates to a kind of device of cantilever cradle Construction of continuous beam, the device that particularly carries out the precompressed test on ground in the face of high aerial cradle structure.
Background technology
Cantilever cradle is the most frequently used form of construction work in the present large-span continuous beam construction, for the reliability of verifying Hanging Basket and the nonelastic deformation of eliminating Hanging Basket, so that the accurate absolute altitude of control casting beams body needs Hanging Basket is carried out precompressed after the Hanging Basket installation.Main preloading method has preloading, Hanging Basket jack counter-force preloading and ground preloading at present, but there is following problem in these ways:
Job readiness time of preloading is long, load that difficulty is large, preloading is highly high, the test Meteorological is high, the test period is long and test in case pinpoint the problems, can not in time unload when needing unloading.
Jack counter-force preloading needs jack is installed on the Hanging Basket bed die, and the work high above the ground difficulty is large, and security risk is high; The lower end needs anti-anchor on pier shaft, and structure is had certain impact.
The ground preloading need be reinstalled to Dun Ding or after taking apart the Hanging Basket integral hoisting that presses in advance at Dun Ding, the integral hoisting difficulty is large, risk is high, poor for applicability, after the dismounting again assembly unit then the deformation data after the precompressed have relatively large deviation with actual the use.
Summary of the invention
Technical problem to be solved in the utility model is the technical deficiency for above-mentioned existence, a kind of work high above the ground risk of avoiding is provided, applicability is strong, loads, off-load is flexible, guarantees the anti-prepressing device that draws in the accurate continuous beam cantilever cast-in-place construction of precompressed data Hanging Basket ground.
The technical scheme that its technical problem that solves the utility model adopts is:
The anti-prepressing device that draws in continuous beam cantilever cast-in-place construction Hanging Basket ground, it is characterized in that: include and be arranged at ground, be listed in the hydraulic jack of continuous cantilever beam both sides in symmetrical minute, hydraulic jack is connected with steel strand, the other end of steel strand is connected on the power distributor that is arranged on the Hanging Basket base plate, described power distributor includes transverse distribution beam and vertical distribution beam, and both are crossed as latticed, evenly stack to be covered in the Hanging Basket backplate surface.
In such scheme, described hydraulic jack is arranged on the ground steel concrete buttress, and hydraulic jack is the punching jack structure, and steel strand pass the central axis of hydraulic jack.
In such scheme, be embedded with in advance bend pipe in the described steel concrete buttress, an end of bend pipe docks with the hydraulic jack level, and an other end opening makes progress, and steel strand pass from hydraulic jack, and pass bend pipe.
In such scheme, on the described steel concrete buttress a plurality of hydraulic jack are installed, the hydraulic jack level is arranged along the continuous beam direction, satisfies the Hanging Basket precompressed demand of different in width.
In such scheme, on the described Hanging Basket base plate, also be provided with position-limited rack, position-limited rack is the isosceles right triangle structure, and two right-angle side is adjacent to respectively the horizontal and vertical edge of Hanging Basket base plate, and the hypotenuse of position-limited rack blocks the power distributor, prevents slippage.
Principle of the present utility model: utilize transfer to provide vertical pressure with the horizontal stretching force of jack, utilize distribution beam to simulate evenly distributed load with point load, utilize the elastic deformation amount of steel strand to be directly proportional with pulling force and the two indexs control of the oil meter reading stretching force of jack.
The beneficial effects of the utility model are:
1. the utility model has been avoided the security risk that work high above the ground brings.
2. this use is novel arranges separately the counter-force stake and is anchor point, has avoided the destruction to the existing structure thing.
3. the utility model applicability is strong, load, off-load is flexible, simple installation is time saving and energy saving.
4. can in time unload if pinpoint the problems in the utility model process of the test, the safety of guarantee test process and precompressed data accurately.
5. the utility model has reduced the expense of experimental material, and charger can reuse, remarkable in economical benefits.
Description of drawings
Fig. 1 is the utility model texture edge schematic diagram
Fig. 2 is the utility model structure elevational schematic view
Fig. 3 is the utility model position-limited rack structural scheme of mechanism
Among the figure, 1-hydraulic jack, anchor plate under the 2-, 3-steel concrete buttress, 4-transverse distribution beam, the vertical distribution beam of 5-, 6-cushion block, the upper anchor plate of 7-, 8-position-limited rack, 9-steel strand, 10-cushion cap, 11-pier shaft, 12-beam body, 13-pre-bending steel pipe.
The specific embodiment
Below in conjunction with the specific embodiment, the utility model is further described:
Continuous beam cantilever cast-in-place construction Hanging Basket ground counter the draw prepressing device shown in Figure 2 such as Fig. 1, be used for the Hanging Basket of beam body 12 both sides that are arranged at continuous beam on cushion cap 10 and the pier shaft 11 is carried out precompressed, include and be arranged at ground, be listed in the hydraulic jack 1 of continuous cantilever beam both sides in symmetrical minute, hydraulic jack 1 is connected with steel strand 9, the other end of steel strand 9 is connected on the cushion block 6 on the power distributor that is arranged on the Hanging Basket base plate, cushion block 6 is set to wedge shape, steel strand 9 are turned to, the two ends of steel strand 9 adopt respectively anchor plate 2 and lower anchor plate 7 to fix, described power distributor includes transverse distribution beam 4 and vertical distribution beam 5, both are crossed as latticed, evenly stack and be covered in Hanging Basket backplate surface, horizontal stroke, vertical distribution beam material is all elected i iron as, and spot welding is fixed.
In the present embodiment, described hydraulic jack 1 is arranged on the ground steel concrete buttress 3, and hydraulic jack 1 is the punching jack structure, and steel strand 9 pass the central axis of hydraulic jack 1.
In the present embodiment, be embedded with in advance pre-bending steel pipe 13 in the described steel concrete buttress 3, an end of pre-bending steel pipe 13 docks with hydraulic jack 1 level, and an other end opening makes progress, and steel strand 9 pass from hydraulic jack 1, and pass pre-bending steel pipe 13.
In the present embodiment, a plurality of hydraulic jack 1 are installed on the described steel concrete buttress 3, hydraulic jack 1 level is arranged along the continuous beam direction, satisfies the blue precompressed demand of extension of different in width.
In the present embodiment, for offsetting the stretch-draw horizontal component to the shear action of rear lower transverse beam anchoring fining twisted steel, at Hanging Basket floor beam welding triangle position-limited rack 8, position-limited rack 8 is the isosceles right triangle structure, every Hanging Basket arranges 3, position-limited rack 8 is connected with the longeron full weld, with the anchor connection of existing beam body.
The magnitude setting of hydraulic jack 1 is determined according to beam body actual loading and field working conditions.
Need before the precompressed hydraulic jack 1 and pressure meter thereof are checked.
The load force that is applied on the Hanging Basket is controlled by hydraulic jack 1 oil meter reading and the two marks of steel strand elongation.
The evenly distributed load hierarchical loading of bearing according to structure during precompressed, for the first time load 30%, for the second time be loaded on 60%, be loaded on for the third time 100%, be loaded on 120% the 4th time, will hold during every grade of loading and press a period of time, measure the cradle structure deflection, check that structure connects situation, and make a determination to continuing pressurization.Take equally load shedding during unloading, and measure malformation amount, record data.
Each jack will pressurize simultaneously, and precompression keeps synchronously, and pressure error is controlled in 5%.
At last experimental result is put in order, the elastic deformation of cradle structure and inelastic deformation are measured structure and are used for guiding construction.
Claims (5)
1. the anti-prepressing device that draws in continuous beam cantilever cast-in-place construction Hanging Basket ground, it is characterized in that: include and be arranged at ground, be listed in the hydraulic jack (1) of continuous cantilever beam both sides in symmetrical minute, hydraulic jack (1) is connected with steel strand (9), the other end of steel strand (9) is connected on the power distributor that is arranged on the Hanging Basket base plate, described power distributor includes transverse distribution beam (4) and vertical distribution beam (5), both are crossed as latticed, evenly stack to be covered in the Hanging Basket backplate surface.
2. the anti-prepressing device that draws in continuous beam cantilever cast-in-place construction Hanging Basket ground as claimed in claim 1, it is characterized in that: described hydraulic jack (1) is arranged on the ground steel concrete buttress (3), hydraulic jack (1) is the punching jack structure, and steel strand (9) pass the central axis of hydraulic jack (1).
3. the anti-prepressing device that draws in continuous beam cantilever cast-in-place construction Hanging Basket ground as claimed in claim 2, it is characterized in that: be embedded with in advance bend pipe in the described steel concrete buttress (3), one end of bend pipe docks with hydraulic jack (1) level, an other end opening upwards, steel strand (9) pass from hydraulic jack (1), and pass bend pipe.
4. the anti-prepressing device that draws in continuous beam cantilever cast-in-place construction Hanging Basket ground as claimed in claim 2, it is characterized in that: a plurality of hydraulic jack (1) are installed on the described steel concrete buttress (3), and hydraulic jack (1) level is arranged along the continuous beam direction.
5. the anti-prepressing device that draws in continuous beam cantilever cast-in-place construction Hanging Basket ground as claimed in claim 1, it is characterized in that: on the described Hanging Basket base plate, also be provided with position-limited rack (8), position-limited rack is (8) isosceles right triangle structure, two right-angle side is adjacent to respectively the horizontal and vertical edge of Hanging Basket base plate, and the hypotenuse of position-limited rack (8) blocks the power distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120550138 CN202766971U (en) | 2011-12-26 | 2011-12-26 | A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120550138 CN202766971U (en) | 2011-12-26 | 2011-12-26 | A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202766971U true CN202766971U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120550138 Expired - Fee Related CN202766971U (en) | 2011-12-26 | 2011-12-26 | A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202766971U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952982A (en) * | 2014-05-13 | 2014-07-30 | 中交二航局第三工程有限公司 | Preloading device and preloading method for hanging basket anchorage pull rod-type jack of bridge box girder |
| CN105002833A (en) * | 2015-07-25 | 2015-10-28 | 西安科技大学 | Suspension type hanging basket prepressing device and hanging basket prepressing method |
| CN109056556A (en) * | 2017-12-29 | 2018-12-21 | 中铁二局第工程有限公司 | A kind of Hanging Basket trussing entirety prepressing structure and preloading method |
| CN110578288A (en) * | 2019-08-28 | 2019-12-17 | 中铁大桥局集团有限公司 | steel-concrete combined beam system conversion device and steel beam weight-pressing method |
| CN110607765A (en) * | 2019-06-19 | 2019-12-24 | 东南大学 | Intelligent bridge hanging basket prepressing device and control method thereof |
| CN113235443A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | Pre-pressing construction method of assembly type 0# block construction bracket |
| CN113235442A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | From novel assembled 0# piece construction bracket of taking pre-compaction subassembly |
-
2011
- 2011-12-26 CN CN 201120550138 patent/CN202766971U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952982A (en) * | 2014-05-13 | 2014-07-30 | 中交二航局第三工程有限公司 | Preloading device and preloading method for hanging basket anchorage pull rod-type jack of bridge box girder |
| CN103952982B (en) * | 2014-05-13 | 2015-12-02 | 中交二航局第三工程有限公司 | Bridge box and beam Hanging Basket anchorage rod-pulling type jack prepressing device and preloading method |
| CN105002833A (en) * | 2015-07-25 | 2015-10-28 | 西安科技大学 | Suspension type hanging basket prepressing device and hanging basket prepressing method |
| CN109056556A (en) * | 2017-12-29 | 2018-12-21 | 中铁二局第工程有限公司 | A kind of Hanging Basket trussing entirety prepressing structure and preloading method |
| CN110607765A (en) * | 2019-06-19 | 2019-12-24 | 东南大学 | Intelligent bridge hanging basket prepressing device and control method thereof |
| CN110578288A (en) * | 2019-08-28 | 2019-12-17 | 中铁大桥局集团有限公司 | steel-concrete combined beam system conversion device and steel beam weight-pressing method |
| CN113235443A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | Pre-pressing construction method of assembly type 0# block construction bracket |
| CN113235442A (en) * | 2021-05-20 | 2021-08-10 | 广西路桥工程集团有限公司 | From novel assembled 0# piece construction bracket of taking pre-compaction subassembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuhan Engineering Co., Ltd., China Railway 7th Bureau Group Co., Ltd. Assignor: China Railway Seventh Group Co., Ltd. Contract record no.: 2015420000145 Denomination of utility model: A ground counter-pull pre-pressing device for a continuous beam cantilever cast-in-place hanging basket Granted publication date: 20130306 License type: Exclusive License Record date: 20150723 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20171226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |