CN201128884Y - Loading prepressing device for suspended bracket - Google Patents
Loading prepressing device for suspended bracket Download PDFInfo
- Publication number
- CN201128884Y CN201128884Y CNU200720190166XU CN200720190166U CN201128884Y CN 201128884 Y CN201128884 Y CN 201128884Y CN U200720190166X U CNU200720190166X U CN U200720190166XU CN 200720190166 U CN200720190166 U CN 200720190166U CN 201128884 Y CN201128884 Y CN 201128884Y
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- China
- Prior art keywords
- loading
- basket
- prepressing device
- hanging basket
- stretcher
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000005266 casting Methods 0.000 claims abstract description 18
- 238000005056 compaction Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 4
- 239000003643 water by type Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 239000004576 sand Substances 0.000 abstract description 9
- 238000002360 preparation method Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract 3
- 239000011148 porous material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 230000005489 elastic deformation Effects 0.000 description 6
- 239000000725 suspension Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a cantilever-casting hanging basket loading and prepressing device. The loading and prepressing device, which is connected with the lower side of one end of a hanging basket overhung and fixed on a pier, comprises a stretcher and a first tension reinforcement, the stretcher is firmly arranged on a test bed beside the pier, the lower end of the first tension reinforcement penetrates into the piercing pore canal of the spindle of the stretcher, and the upper end of the first tension reinforcement is firmly connected with the cantilever end of the hanging basket. The device applies the cantilever-casting hanging basket loading and prepressing device to replace the prior loading and prepressing device using a water tank or a sand bag, thus resolving all the defects existed in the prior loading and prepressing structure. The cantilever-casting hanging basket loading and prepressing device of the utility model has the advantages that the time of loading and unloading is short, operation is simple, preparation does not last long, and a test is simple and quick; moreover, other devices are not needed, so the test cost is low; when a problem occurs, unloading can be performed in time, so safety accidents cannot easily happen.
Description
Technical Field
The utility model relates to a bridge construction equipment, especially a used loading pre-compaction device who hangs the basket when being used for the pouring of bridge roof beam body cantilever.
Background
After the hanging basket is assembled, in order to verify the reliability of the hanging basket and eliminate the inelastic deformation of the hanging basket, the actual deformation of the hanging basket under different loads is measured, so that the elevation of a vertical mold is corrected in the winding degree control, and the pressure test must be carried out on the hanging basket before the hanging basket is used for the first time. Common pressure testing methods include a water tank method and a sand bag method. The front end of the hanging basket is provided with a group of water tanks (or sand bags) below, and then water is injected (sand is added) and discharged (sand is reduced) step by step according to the design requirements, and the steps are repeated for a plurality of times, so that the purposes of eliminating the inelastic deformation and measuring the elastic deformation are achieved. The prepressing with these methods has the following drawbacks:
1) the water injection amount (or sand adding amount) is large. The pressure test usually needs hundreds of tons of water (or sand), which increases the difficulty of test preparation and has potential safety hazard in operation.
2) The test time is long. The water injection and the water drainage take longer time, so that the test is not convenient and rapid.
3) The test cost investment is large. And equipment such as a large-capacity water tank and the like needs to be input, so that the method is not economical.
4) When a problem is found in a test, the unloading time is long, and safety accidents are easy to happen.
Therefore, there is a need to provide a new basket loading prepressing apparatus to overcome the drawbacks of the above-mentioned prepressing apparatus and method.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hang basket loading pre-compaction device that waters adopts jack high-strength steel bar application of force method promptly, pressurizes. The high-strength reinforcing steel bars are anchored on the bottom basket cross beam, the counter-force beam and the test bed. And (3) converting a corresponding tension value according to a calculated value of the maximum load distribution condition applied by the structure, applying tension by using a jack step by step, recording the relation between the force and the displacement, drawing a relation curve of the force and the displacement according to a result measured by a test, and solving the elastic deformation and the inelastic deformation of the cradle so as to adjust the template elevation in the construction process.
The utility model aims at realizing like this, a hang and water a hang basket loading pre-compaction device, this loading pre-compaction device with hang stretch fix on the pier hang basket one end below be connected, this loading pre-compaction device including stretcher and first pulling force muscle, the stretcher sets firmly on the other test bench of pier, first pulling force muscle lower extreme penetrates the hole of wearing the heart in stretcher axle center and fixes, first pulling force muscle upper end fixed connection in hang the cantilever end of basket.
The present invention provides a preferable embodiment, wherein a plurality of loading pre-pressing devices are arranged between the lower part of the cantilever end of the cradle and the test bed side by side.
The utility model discloses a preferred embodiment, a plurality of loading pre-compaction devices equidistant evenly set up hang the cantilever end below of basket.
In a preferred embodiment of the present invention, the drawing machine is a feed-through hydraulic jack.
In a preferred embodiment of the present invention, the center-penetrating hydraulic jack is fixed to a lower side of a counter-force beam, and two ends of the counter-force beam are connected to the test bed by two second tension bars, respectively; and the lower end of the first tension rib penetrates through the counter-force beam and a through hole channel of the axis of the through oil jack and is fixed.
In a preferred embodiment of the present invention, the counter-force beam is formed by welding two I-shaped steel bars, and three round holes are formed on the weld line at intervals to penetrate the first and second tension bars.
In a preferred embodiment of the present invention, the test bed is an abutment, a bearing platform, a shoreside beam or a counterweight.
In a preferred embodiment of the present invention, the allowable load of the through hydraulic jack is not less than 120 tons.
In a preferred embodiment of the present invention, the first and second tension bars are phi 32 finish rolled deformed steel bars.
From top to bottom, the utility model discloses in adopt the hanging basket loading pre-compaction device that waters to hang to replace current with water tank or sand bag loading pre-compaction device, consequently can overcome each item defect in the current structure. The loading and unloading time of the suspension casting hanging basket loading prepressing device of the utility model is short, the operation is simple, the preparation in a longer time is not needed, and the test is simple, convenient and rapid; other equipment is not required to be input, and the test cost is low; when a problem is found, the device can be unloaded in time, and safety accidents are not easy to happen.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,
FIG. 1: do the utility model discloses a hang and water a string basket loading pre-compaction device and set up in the schematic diagram of hanging the basket.
FIG. 2: is a side view of fig. 1.
FIG. 3: do the utility model discloses a hang structural schematic of watering and hanging basket loading pre-compaction device.
FIG. 4: do the utility model discloses the structure schematic diagram of well counter-force roof beam.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
The hanging basket in the utility model is an existing device, and comprises a main longitudinal beam, a walking system, a bottom basket and other structures; the hanging basket is internally provided with a bridge template, and during construction, after the casting of the No. 0 block above the bridge pier is finished, the hanging basket is adopted to carry out the suspension casting construction of the No. 1 block; at the moment, the rear part of the hanging basket is fixed on the pier stud by a rear anchoring part or on a No. 0 block, and the front part of the hanging basket extends out of the pier stud in a hanging manner; in order to ensure the reliability of the hanging basket structure, know the elastic deformation in the hanging basket construction and eliminate the inelastic deformation of the hanging basket, the hanging basket must be pre-pressed before use.
Different with current construction method the anterior cantilever end of string basket is provided with the utility model discloses a hang and water string basket loading pre-compaction device 1. As shown in fig. 1, 2 and 3, the loading and pre-pressing device 1 includes a stretcher 10 and a first tension bar 12, the stretcher 10 is fixedly disposed on a test bed 2 beside a pier, a lower end of the first tension bar 12 penetrates through a through hole (not shown) of an axis of the stretcher 10 and is fixed, and an upper end of the first tension bar 12 is fixedly connected to a cantilever end 31 (shown in fig. 2) of the cradle 3. The utility model discloses in, hang 3 front portions of basket and calculate corresponding pulling force value of applying according to the maximum load distribution condition that the structure was used, through stretcher 10 for hanging 3 unloads of basket loading step by step, 3 security of basket are hung in the inspection, measure 3 elastic deformation parameters of hanging the basket and eliminate inelastic deformation, calculate the vertical displacement of hanging basket 3 in each period of watering by overhang according to the data of surveying to control the elevation of watering by overhang.
Because the utility model discloses well adoption suspension casting hangs basket loading pre-compaction device 1 and replaces current with water tank or sand bag loading pre-compaction device, consequently can overcome each item defect in the current structure. The suspension casting hanging basket loading prepressing device 1 of the utility model has short loading and unloading time, simple operation, no longer time preparation and simple and rapid test; other equipment is not required to be input, and the test cost is low; when a problem is found, the device can be unloaded in time, and safety accidents are not easy to happen.
In a preferred embodiment of the present invention, the drawing machine 10 is a through hydraulic jack 11, and the allowable load of the through hydraulic jack is not less than 120 tons; the center-penetrating type oil jack 11 is fixed on the lower side of a counter-force beam 13, and two ends of the counter-force beam 13 are respectively connected with the test bed 2 through two second tension ribs 14; the lower end of the first tension bar 12 passes through the reaction beam 13 and a through hole (not shown) of the axis of the through hydraulic jack 11 and is fixed.
Further, as shown in fig. 4, the reaction beam 13 is formed by welding two I-shaped steel bars, and three circular holes 131 for inserting the first and second tension bars are provided at intervals on the weld line. The circular hole 131 has a diameter of 50 mm.
In a preferred embodiment of the present invention, the test bed may be an abutment, a bearing platform, a shore beam, or a counterweight.
In a preferred embodiment of the present invention, the first and second tension bars 12 and 14 are phi 32 finish-rolled deformed steel bars. One section of the upper end of the first tension bar 12 is anchored on the cross beam of the bottom basket 3 (as shown in fig. 1 and fig. 2), and the lower end of the first tension bar 12 is anchored by a nut with a diameter of phi 32 after passing through the reserved round hole 131 in the middle of the counterforce beam 13, the through hole of the axis of the through hydraulic jack 11 and the gasket 111. The upper ends of the second tension bars 14 on the two sides penetrate through the reserved round holes 131 at the two ends of the counter-force beam 13 and are anchored, and the lower ends of the second tension bars 14 are anchored on the test bed 2 (or are embedded in the test bed 2).
In the utility model, a plurality of loading prepressing devices 1 can be arranged between the lower part of the cantilever end 31 of the hanging basket 3 and the test bed 2 side by side; preferably, four loading and pre-pressing devices 1 are provided, and the four loading and pre-pressing devices 1 are uniformly arranged below the cantilever end 31 of the cradle 3 at equal intervals (as shown in fig. 1).
Before the prestress is applied, the jack 11 and the pressure gauge are subjected to pairing verification, and when the jack 11 is used for more than 6 months or 200 times or abnormal conditions and overhaul occur in the using process, the verification is carried out again.
During pressure test, loading is carried out according to the grading weight of the calculated value of the maximum load distribution condition applied by the structure, when the jack 11 reaches each grade of load, the jack is fixed for a period of time, and after the pointer is stabilized, the deformation value is measured; and (3) measuring deformation values of all levels during unloading, unloading in a grading manner, measuring deformation and recording data. According to the results measured by the test, a relation curve of force and displacement is drawn, and elastic deformation and inelastic deformation of the cradle 3 are solved.
During loading, the four jacks 11 must be pressurized simultaneously, the pressure stress should be kept synchronous, and the error is controlled within 5%.
After each level of loading, the connection condition and the working condition of each rod piece of the cradle 3 must be checked in time, whether the loading is continued or not is judged in time, if the condition is good after one-time loading, the loading is repeated for 3-5 times, until all the inelastic deformation is eliminated, a loading test report is arranged according to the test result, and the measurement results of the elastic deformation value and the inelastic deformation value are used for guiding the construction so as to adjust the elevation of the template in the construction process.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (10)
1. The utility model provides a hang basket loading pre-compaction device that waters, this loading pre-compaction device with hang stretch fix on the pier hang basket one end below be connected its characterized in that: the loading pre-pressing device comprises a stretcher and a first tension rib, wherein the stretcher is fixedly arranged on a test bed beside a pier, the lower end of the first tension rib penetrates through a core penetrating hole in the axis of the stretcher and is fixed, and the upper end of the first tension rib is fixedly connected with a cantilever end of the hanging basket.
2. The suspended casting basket loading prepressing device according to claim 1, characterized in that: and a plurality of loading and prepressing devices are arranged between the lower part of the cantilever end of the hanging basket and the test bed side by side.
3. The suspended casting basket loading prepressing device according to claim 2, characterized in that: the plurality of loading prepressing devices are uniformly arranged below the cantilever end of the hanging basket at equal intervals.
4. The suspended casting basket loading prepressing device according to claim 1, characterized in that: the stretcher is a feed-through oil jack.
5. The suspended casting basket loading prepressing device according to claim 4, characterized in that: the center-penetrating oil jack is fixed on the lower side of a counter-force beam, and two ends of the counter-force beam are respectively connected with the test bed through two second tension ribs; and the lower end of the first tension rib penetrates through the counter-force beam and a through hole channel of the axis of the through oil jack and is fixed.
6. The suspended casting basket loading prepressing device according to claim 5, characterized in that: the counter-force beam is formed by oppositely welding two I-shaped steels, and three round holes for penetrating the first tension bar and the second tension bar are arranged on a welding line at intervals.
7. The suspended casting basket loading prepressing device according to claim 1, characterized in that: the test bed is a bridge abutment, a bearing platform, a shoreside beam or a counterweight.
8. The suspended casting basket loading prepressing device according to claim 1, characterized in that: the allowable load of the through type oil jack is not less than 120 tons.
9. The suspended casting basket loading prepressing device according to claim 1, characterized in that: the first tension bar is phi 32 finish-rolled deformed steel bar.
10. The suspended casting basket loading prepressing device according to claim 5, characterized in that: the second tension bar is phi 32 finish-rolled deformed steel bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720190166XU CN201128884Y (en) | 2007-11-15 | 2007-11-15 | Loading prepressing device for suspended bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720190166XU CN201128884Y (en) | 2007-11-15 | 2007-11-15 | Loading prepressing device for suspended bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201128884Y true CN201128884Y (en) | 2008-10-08 |
Family
ID=40016721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720190166XU Expired - Lifetime CN201128884Y (en) | 2007-11-15 | 2007-11-15 | Loading prepressing device for suspended bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201128884Y (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845794A (en) * | 2010-03-24 | 2010-09-29 | 中冶实久建设有限公司 | Prestress prepressing method of number 0 block construction support for rigid frame bridge and stayed-cable bridge |
| CN101942809A (en) * | 2010-09-30 | 2011-01-12 | 中铁四局集团第一工程有限公司 | Hanging-basket main-truss prepressing system |
| CN102051858A (en) * | 2010-12-08 | 2011-05-11 | 四川路航建设工程有限责任公司 | Jack loading triangular truss hanging basket and load test construction method thereof |
| CN102587283A (en) * | 2012-03-14 | 2012-07-18 | 中国十九冶集团有限公司 | Cast-in-place construction method of cast-in-place concrete bridge |
| CN103061264A (en) * | 2012-12-08 | 2013-04-24 | 中铁三局集团有限公司 | Method and device for pre-pressing high-position support single column in water |
| CN103437291A (en) * | 2013-08-02 | 2013-12-11 | 中交二公局第一工程有限公司 | Integral water tank preloading construction process |
| CN104131516A (en) * | 2014-08-14 | 2014-11-05 | 江苏省交通工程集团有限公司 | Bridge cast-in-cantilever method cradle counter-pressure construction method |
| CN104894981A (en) * | 2015-06-12 | 2015-09-09 | 吴江市明港道桥工程有限公司 | Reaction frame pre-pressing system for bracket of cantilever section |
| CN107167289A (en) * | 2017-05-17 | 2017-09-15 | 上海应用技术大学 | A kind of great cantilever precast assembly bent cap load test method |
| CN110607765A (en) * | 2019-06-19 | 2019-12-24 | 东南大学 | Intelligent bridge hanging basket prepressing device and control method thereof |
| CN111026101A (en) * | 2020-01-15 | 2020-04-17 | 重庆西晶源流体技术有限公司 | Comprehensive test bed of electro-hydraulic control system |
| CN112408234A (en) * | 2020-11-23 | 2021-02-26 | 长春一汽富维东阳汽车塑料零部件有限公司 | Motor hoisting system based on box beam static load test system |
| CN113737653A (en) * | 2021-08-11 | 2021-12-03 | 广东水电二局股份有限公司 | Prepressing device of bearing support and using method thereof |
| CN114908683A (en) * | 2022-06-06 | 2022-08-16 | 中铁大桥局集团有限公司 | Pre-compaction device of cantilever construction bridge support and string basket |
-
2007
- 2007-11-15 CN CNU200720190166XU patent/CN201128884Y/en not_active Expired - Lifetime
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845794B (en) * | 2010-03-24 | 2012-12-12 | 中国十九冶集团有限公司 | Prestress prepressing method for 0# block construction bracket of rigid frame bridge and cable-stayed bridge |
| CN101845794A (en) * | 2010-03-24 | 2010-09-29 | 中冶实久建设有限公司 | Prestress prepressing method of number 0 block construction support for rigid frame bridge and stayed-cable bridge |
| CN101942809A (en) * | 2010-09-30 | 2011-01-12 | 中铁四局集团第一工程有限公司 | Hanging-basket main-truss prepressing system |
| CN102051858A (en) * | 2010-12-08 | 2011-05-11 | 四川路航建设工程有限责任公司 | Jack loading triangular truss hanging basket and load test construction method thereof |
| CN102051858B (en) * | 2010-12-08 | 2012-05-23 | 四川路航建设工程有限责任公司 | Jack loading triangular truss hanging basket and load test construction method thereof |
| CN102587283B (en) * | 2012-03-14 | 2014-11-26 | 中国十九冶集团有限公司 | Cast-in-place construction method of cast-in-place concrete bridge |
| CN102587283A (en) * | 2012-03-14 | 2012-07-18 | 中国十九冶集团有限公司 | Cast-in-place construction method of cast-in-place concrete bridge |
| CN103061264B (en) * | 2012-12-08 | 2015-05-13 | 中铁三局集团有限公司 | Method and device for pre-pressing high-position support single column in water |
| CN103061264A (en) * | 2012-12-08 | 2013-04-24 | 中铁三局集团有限公司 | Method and device for pre-pressing high-position support single column in water |
| CN103437291A (en) * | 2013-08-02 | 2013-12-11 | 中交二公局第一工程有限公司 | Integral water tank preloading construction process |
| CN103437291B (en) * | 2013-08-02 | 2015-10-21 | 中交二公局第一工程有限公司 | Monolithic water tank precompressed construction technology |
| CN104131516A (en) * | 2014-08-14 | 2014-11-05 | 江苏省交通工程集团有限公司 | Bridge cast-in-cantilever method cradle counter-pressure construction method |
| CN104894981A (en) * | 2015-06-12 | 2015-09-09 | 吴江市明港道桥工程有限公司 | Reaction frame pre-pressing system for bracket of cantilever section |
| CN107167289A (en) * | 2017-05-17 | 2017-09-15 | 上海应用技术大学 | A kind of great cantilever precast assembly bent cap load test method |
| CN110607765A (en) * | 2019-06-19 | 2019-12-24 | 东南大学 | Intelligent bridge hanging basket prepressing device and control method thereof |
| CN111026101A (en) * | 2020-01-15 | 2020-04-17 | 重庆西晶源流体技术有限公司 | Comprehensive test bed of electro-hydraulic control system |
| CN111026101B (en) * | 2020-01-15 | 2021-03-26 | 重庆西晶源流体技术有限公司 | Comprehensive test bed of electro-hydraulic control system |
| CN112408234A (en) * | 2020-11-23 | 2021-02-26 | 长春一汽富维东阳汽车塑料零部件有限公司 | Motor hoisting system based on box beam static load test system |
| CN113737653A (en) * | 2021-08-11 | 2021-12-03 | 广东水电二局股份有限公司 | Prepressing device of bearing support and using method thereof |
| CN114908683A (en) * | 2022-06-06 | 2022-08-16 | 中铁大桥局集团有限公司 | Pre-compaction device of cantilever construction bridge support and string basket |
| CN114908683B (en) * | 2022-06-06 | 2023-05-02 | 中铁大桥局集团有限公司 | Cantilever construction bridge support and pre-compaction device of hanging basket |
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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 |
Granted publication date: 20081008 |