CN102425122A - Asymmetric loading prepressing device for hanging basket for bridge cantilever casting construction - Google Patents
Asymmetric loading prepressing device for hanging basket for bridge cantilever casting construction Download PDFInfo
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- CN102425122A CN102425122A CN2011104386623A CN201110438662A CN102425122A CN 102425122 A CN102425122 A CN 102425122A CN 2011104386623 A CN2011104386623 A CN 2011104386623A CN 201110438662 A CN201110438662 A CN 201110438662A CN 102425122 A CN102425122 A CN 102425122A
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- hanging basket
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Abstract
The invention discloses an asymmetric loading prepressing device for a hanging basket for bridge cantilever casting construction, which comprises a No. 0 block and the hanging basket, and also comprises a reaction frame, wherein the No. 0 block is arranged at the upper end of a pier body, and the hanging basket is connected onto the No. 0 block; the side-viewing projections of the reaction frame are in a triangular frame shape respectively; all triangular frames respectively comprise a floor stand, an underframe and an angle frame; the reaction frame is provided with two triangular frames; and the two triangular frames are connected through a cross arm. When the asymmetric loading prepressing device for the hanging basket for the bridge cantilever casting construction is used, a jack is arranged between the connection point of each underframe and each angle frame and the lower cross girder of the hanging basket, and the ends of the underframes, which are connected with the angle frames and the floor stands, are respectively and fixedly connected with the No. 0 block. In the asymmetric loading prepressing device for the hanging basket for the bridge cantilever casting construction, as the reaction frame, the jacks, the hanging basket and a box girder form a system, and for the system, forces applied by loading jacks are internal forces, a loading test can be conducted without both-end symmetry, and moreover, any weights are not needed in the loading test, thereby, the working capacity of the loading test is less, and the operation is safe.
Description
Technical field
The present invention relates to bridge construction, be specifically related to the loading precompressed experimental rig of a kind of construction equipment in the bridge construction.
Background technology
Cantilever pouring construction Hanging Basket is after the assembly unit of pier top finishes; Must carry out load test verifies the reliability of Hanging Basket; Measure the deflection of Hanging Basket under different load actions simultaneously, so that in the normal use of Hanging Basket, adjust the formwork erection absolute altitude, control beam body is linear.Pressure-measuring method commonly used has sand pocket method, lift heavy method and cushion cap pre-embedded bolt jack pressurization.Use these methods to load the precompressed test, exist following defective:
1) all need two ends Hanging Basket symmetry to load.Otherwise will make pier shaft bear excessive moment of flexure, and cause pier shaft or beam body impaired, this is that institute is unallowed in the design.
2) it is big or to add loading many to add the sand amount.Test needs up to a hundred tons of sand or weight (large-tonnage Hanging Basket need sand amount more many), has increased the test difficulty, the also bigger security risk of existence in the operation.
3) the pre-buried anchor bolt of cushion cap is limited by dimension of platform often, is difficult for implementing.
Summary of the invention
The technical problem that the present invention will solve provides the asymmetric loading prepressing device of a kind of bridge cantilever pouring construction Hanging Basket, need not the two ends symmetry and can carry out load test, and do not need weight in the load test, little, the handling safety of load test workload.
The present invention realizes through following technical scheme:
The asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket; Comprise reaction frame; Said reaction frame side-looking projection framework triangular in shape, said triangular framing is by stand, underframe and tiltedly be configured to, and said reaction frame is provided with two triangular framings; Connect through stull between two triangular framings, said stull is provided with one at least.
The asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket comprises No. 0 piece of pier shaft upper end, is connected in the Hanging Basket of No. 0 piece, also comprises reaction frame, said reaction frame side-looking projection framework triangular in shape; Said triangular framing is by stand, underframe and tiltedly be configured to, and said reaction frame is provided with two triangular framings, connects through stull between two triangular framings, and said stull is provided with one at least; Be provided with jack between the lower transverse beam before the tie point place of underframe and oblique frame and the Hanging Basket during use; Said underframe is fixedly connected with No. 0 piece respectively with the link of stand with oblique frame.
The further improvement project of the present invention is; Said triangular framing is the right-angled triangle framework; Said stull is arranged between the underframe and oblique frame link of two right-angled triangle frameworks, and when stull was provided with two, another root was arranged between the oblique frame 6 of two right-angled triangle frameworks.
The present invention further improvement project is, the height of said stand is lower than the height of No. 0 piece in pier shaft upper end, and the length of stull is greater than the lateral dimension of No. 0 piece axial hole, less than No. 0 piece end face middle and lower part lateral dimension.The upper end mounting points of said stand is arranged under the longitudinal prestressing pipeline, is not less than 60 centimetres apart from prestress pipe.
The present invention further improvement project is that the acute angle between the underframe of each right-angled triangle framework and the oblique frame link is the 35-65 degree.
The present invention further improvement project is; Said underframe and oblique frame protrude from the link of stand; Be embedded with finish rolling deformed bar or steel plate in the underframe and the oblique relevant position of frame protruding end in No. 0 piece, underframe and oblique frame protruding end are adopted finish rolling deformed bar to be connected respectively with No. 0 piece or are welded to connect with steel plate.
The present invention further improvement project is, underframe is respectively equipped with junction plate with oblique frame protruding end, and said junction plate is provided with the screw with the finish rolling deformed bar coupling, connect with nut check, or junction plate and steel plate is welded to connect.
The present invention compared with prior art has following obvious advantage:
The present invention is employed in pre-buried supporting steel plate and finish rolling deformed bar in No. 0 piece on the pier shaft, is used to install reaction frame, and between reaction frame and Hanging Basket front beam, jack is set; Utilize stretch-draw jack pair reaction frame and Hanging Basket to pressurize; Because reaction frame, jack, Hanging Basket, case beam are formed an individual system, concerning this individual system, the power that the loading jack applies is internal force; It doesn't matter with the anterior-posterior balance of No. 0 piece, therefore can make an experiment to one-sided Hanging Basket.It loads the maximum load classification of being born when numerical values recited designs according to Hanging Basket and loads, and loads numerical value and illustrates through jack oil pressure meter reading.The vertical displacement (amount of deflection) of record loading force and Hanging Basket truss measuring point in the loading procedure, and according to result of the test drafting power and Hanging Basket Deflection Relationship curve, be used in construction Hanging Basket formwork erection absolute altitude being adjusted.
Description of drawings
Fig. 1 is reaction frame schematic side view (the reaction frame enlarged drawing among Fig. 3).
Fig. 2 is reaction frame schematic perspective view (the reaction frame enlarged drawing among Fig. 3).
Fig. 3 is a load test user mode sketch map.
Fig. 4 is connected in No. 0 piece sketch map (enlarged drawing) for reaction frame among Fig. 3.
Fig. 5 is No. 0 piece end view among Fig. 3.
The specific embodiment
As shown in Figure 1, the present invention includes reaction frame, the rectangular triangular framing of said reaction frame side-looking projection, said triangular framing is made up of stand 4, underframe 5 and oblique frame 6.As shown in Figure 2, reaction frame is provided with two right-angled triangle frameworks, is provided with stull 8 between the underframe 5 of two right-angled triangle frameworks and oblique frame 6 links.
The height of said stand 4 is lower than the height of No. 0 piece 2 in pier shaft 1 upper end, and the length of stull 8 is greater than the lateral dimension of No. 0 piece 2 axial holes 11, less than No. 0 piece 2 end face middle and lower part lateral dimensions.
Like Fig. 1, shown in 2, underframe 5 protrudes from stand 4 links with oblique frame 6, and its protruding end is respectively equipped with the junction plate 10 with No. 0 piece 2 of pier shaft 1 upper end.Be provided with connecting hole like junction plate 10, then No. 0 piece 2 needs connections that match of pre-buried finish rolling deformed bar, does not establish connecting hole like junction plate 10, and then No. 0 piece 2 need pre-embedded steel slabs are welded to connect with it.
Acute angle a between the underframe 5 of each right-angled triangle framework and oblique frame 6 links is 46 degree.
As shown in Figure 3, the present invention includes No. 0 piece 2 of pier shaft 1 upper end, be connected in the Hanging Basket 3 of No. 0 piece 2, also comprise reaction frame, the rectangular triangular framing of said reaction frame side-looking projection; Said triangular framing is made up of stand 4, underframe 5 and oblique frame 6, and said reaction frame is provided with two triangular framings, is provided with stull 8 between the underframe 5 of two right-angled triangle frameworks and oblique frame 6 links; Be provided with jack 7 between the lower transverse beams 31 before the tie point place of underframe 5 and oblique frame 6 and the Hanging Basket 3 during use.
Like Fig. 3, shown in 4; Underframe 5 protrudes from stand 4 links with oblique frame 6; The protruding end is respectively equipped with junction plate 10; No. 0 piece 2 is embedded with finish rolling deformed bar and steel plate 9 in the relevant position of underframe 5 and oblique frame 6 protruding ends, and the junction plate of underframe 5 protruding ends is provided with the screw with the finish rolling deformed bar coupling, connects with nut check.Tiltedly junction plate and No. 0 piece 2 set steel plates 9 of frame 6 protruding ends are welded to connect.
Like Fig. 3, shown in 5, the height of said stand 4 is lower than the height of No. 0 piece 2 in pier shaft 1 upper end, and the length of stull 8 is greater than the lateral dimension of No. 0 piece 2 axial holes 11, less than No. 0 piece 2 end face middle and lower part lateral dimensions.In the present embodiment, the height of No. 0 piece 2 is 7.85 meters, and the height of stand 4 is 4.81 meters (apart from 70 centimetres in longitudinal prestressing pipeline, not shown prestress pipes); The lateral dimension of No. 0 piece 2 axial holes is 4.5 meters, and No. 0 piece 2 end face middle and lower part lateral dimensions are 5.3 meters, and the length of stull 8 is 4.9 meters.
The load test process:
One, preparation
Underframe of reaction frame 5 and oblique frame 6 are connected and fixed on piece 2 No. 0, and jack is positioned between the tie point and the preceding lower transverse beam of Hanging Basket of the underframe of reaction frame and oblique frame; Measure the end face absolute altitude of the preceding lower transverse beam of Hanging Basket; The instrument at installation and measuring position and scale; Carry out preparations such as measuring apparatus, instrument and record form.
Two, pressure-measuring method
Stretch-draw jack pair Hanging Basket front end loads precompressed.According to the design precompression, through the stretch-draw jack, Hanging Basket is carried out hierarchical loading or unloading, measure its corresponding deformation values simultaneously.
Three, hierarchical loading and unloading
Its main purpose is a control loaded speed, is convenient to observe the rule of Hanging Basket distortion with loads change, simultaneously, helps the safety of Hanging Basket precompressed test.The Hanging Basket precompressed loads 1.2 times of considerations that total amount is pressed the maximum cantilever piece spare of case beam weight, and every grade is loaded as 10% of total load; Unloading is identical with loading numerical value, so that contrast is analyzed in its distortion.The hierarchical loading inter-stage intermittent time is by controlling about 15min.
Four, measure monitoring
Main project comprises the sedimentation of the forward and backward fulcrum of main truss, and the distortion amount of deflection of preceding suspension centre.After precompressed finished, reply observation data analyzing and processing simultaneously, was drawn the load and the amount of deflection corresponding relation curve of Hanging Basket test, as the foundation of Hanging Basket cantilever casting construction formwork erection absolute altitude adjustment.
Five, reaction frame is removed
Treat that precompressed finishes, and observation data analyze no abnormal after, remove reaction frame.
Claims (10)
1. the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket; It is characterized in that: comprise reaction frame; Said reaction frame side-looking projection framework triangular in shape, said triangular framing is made up of stand (4), underframe (5) and oblique frame (6), and said reaction frame is provided with two triangular framings; Connect through stull (8) between two triangular framings, said stull (8) is provided with one at least.
2. the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket as claimed in claim 1; It is characterized in that: said triangular framing is the right-angled triangle framework; Said stull (8) is arranged between the underframe (5) and oblique frame (6) link of two right-angled triangle frameworks; When stull (8) was provided with two, another root was arranged between the oblique frame 6 of two right-angled triangle frameworks.
3. according to claim 1 or claim 2 the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket; It is characterized in that: the height of said stand (4) is lower than the height of pier shaft (1) No. 0 piece in upper end (2); The length of stull (8) is greater than the lateral dimension of No. 0 piece (2) axial hole (11), less than No. 0 piece (2) end face middle and lower part lateral dimension.
4. according to claim 1 or claim 2 the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket; It is characterized in that: said underframe (5) and tiltedly frame (6) protrude from stand (4) link, its protruding end is respectively equipped with the junction plate (10) with No. 0 piece (2) of pier shaft (1) upper end.
5. the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket as claimed in claim 2 is characterized in that: the acute angle a between underframe of each right-angled triangle framework (5) and oblique frame (6) link is the 35-65 degree.
6. the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket comprises No. 0 piece (2) of pier shaft (1) upper end, is connected in the Hanging Basket (3) of No. 0 piece (2), it is characterized in that: also comprise reaction frame, said reaction frame side-looking projection framework triangular in shape; Said triangular framing is made up of stand (4), underframe (5) and oblique frame (6), and said reaction frame is provided with two triangular framings, connects through stull (8) between two triangular framings, and said stull (8) is provided with one at least; Be provided with jack (7) between the tie point place of underframe 5 and oblique frame 6 and the preceding lower transverse beam of Hanging Basket (3) (31); Said underframe (5) is fixedly connected with No. 0 piece (2) respectively with the link of stand (4) with oblique frame (6).
7. the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket as claimed in claim 6; It is characterized in that: said triangular framing is the right-angled triangle framework; Said stull (8) is arranged between the underframe (5) and oblique frame (6) link of two right-angled triangle frameworks; When stull (8) was provided with two, another root was arranged between the oblique frame 6 of two right-angled triangle frameworks.
8. like claim 6 or the asymmetric loading prepressing device of 7 described bridge cantilever pouring construction Hanging Baskets; It is characterized in that: the height of said stand (4) is lower than the height of pier shaft (1) No. 0 piece in upper end (2); The length of stull (8) is greater than the lateral dimension of No. 0 piece (2) axial hole (11), less than No. 0 piece (2) end face middle and lower part lateral dimension.
9. the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket as claimed in claim 6; It is characterized in that: said underframe (5) and oblique frame (6) protrude from the link of stand (4); Be embedded with finish rolling deformed bar or steel plate (9) in the relevant position of underframe (5) and oblique frame (6) protruding end in No. 0 piece (2), underframe (5) adopts finish rolling deformed bar to be connected with oblique frame (6) protruding end respectively with No. 0 piece (2) or is welded to connect with steel plate (9).
10. the asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket as claimed in claim 9; It is characterized in that: underframe (5) and oblique frame (6) protruding end are respectively equipped with junction plate (10); Said junction plate is provided with the screw with the finish rolling deformed bar coupling; Connect with nut check, or junction plate and steel plate (9) are welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104386623A CN102425122A (en) | 2011-12-26 | 2011-12-26 | Asymmetric loading prepressing device for hanging basket for bridge cantilever casting construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104386623A CN102425122A (en) | 2011-12-26 | 2011-12-26 | Asymmetric loading prepressing device for hanging basket for bridge cantilever casting construction |
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| CN102425122A true CN102425122A (en) | 2012-04-25 |
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| CN2011104386623A Pending CN102425122A (en) | 2011-12-26 | 2011-12-26 | Asymmetric loading prepressing device for hanging basket for bridge cantilever casting construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| JP2004225275A (en) * | 2003-01-20 | 2004-08-12 | Taisei Corp | Erection apparatus for corrugated steel plate web box girder bridge, and construction method for corrugated steel plate web box girder bridge |
| CN201574359U (en) * | 2009-10-16 | 2010-09-08 | 中铁十七局集团第二工程有限公司 | Hanging basket equivalent preloading device used in high-pier large-span bridge construction |
| CN101949778A (en) * | 2010-08-11 | 2011-01-19 | 中铁三局集团有限公司 | Cradle static loading test method |
| CN102004055A (en) * | 2010-10-18 | 2011-04-06 | 中铁十九局集团第一工程有限公司 | Cradle static load test device |
| CN202023150U (en) * | 2011-03-03 | 2011-11-02 | 中铁四局集团第一工程有限公司 | Reaction frame pre-pressing system used in bridge hanging basket construction |
| CN202416193U (en) * | 2011-12-26 | 2012-09-05 | 江苏省交通工程集团有限公司 | Asymmetric loading and pre-pressing device for bridge cantilever pouring construction hanging basket |
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2011
- 2011-12-26 CN CN2011104386623A patent/CN102425122A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004225275A (en) * | 2003-01-20 | 2004-08-12 | Taisei Corp | Erection apparatus for corrugated steel plate web box girder bridge, and construction method for corrugated steel plate web box girder bridge |
| CN201574359U (en) * | 2009-10-16 | 2010-09-08 | 中铁十七局集团第二工程有限公司 | Hanging basket equivalent preloading device used in high-pier large-span bridge construction |
| CN101949778A (en) * | 2010-08-11 | 2011-01-19 | 中铁三局集团有限公司 | Cradle static loading test method |
| CN102004055A (en) * | 2010-10-18 | 2011-04-06 | 中铁十九局集团第一工程有限公司 | Cradle static load test device |
| CN202023150U (en) * | 2011-03-03 | 2011-11-02 | 中铁四局集团第一工程有限公司 | Reaction frame pre-pressing system used in bridge hanging basket construction |
| CN202416193U (en) * | 2011-12-26 | 2012-09-05 | 江苏省交通工程集团有限公司 | Asymmetric loading and pre-pressing device for bridge cantilever pouring construction hanging basket |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Application publication date: 20120425 |