CN202416193U - Asymmetric loading and pre-pressing device for bridge cantilever pouring construction hanging basket - Google Patents

Asymmetric loading and pre-pressing device for bridge cantilever pouring construction hanging basket Download PDF

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Publication number
CN202416193U
CN202416193U CN2011205480401U CN201120548040U CN202416193U CN 202416193 U CN202416193 U CN 202416193U CN 2011205480401 U CN2011205480401 U CN 2011205480401U CN 201120548040 U CN201120548040 U CN 201120548040U CN 202416193 U CN202416193 U CN 202416193U
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CN
China
Prior art keywords
hanging basket
underframe
piece
frame
stull
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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 - Fee Related
Application number
CN2011205480401U
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Chinese (zh)
Inventor
董立功
周汉林
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Jiangsu Provincial Transportation Engineering Group Co Ltd
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Jiangsu Provincial Transportation Engineering Group Co Ltd
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Priority to CN2011205480401U priority Critical patent/CN202416193U/en
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Publication of CN202416193U publication Critical patent/CN202416193U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an asymmetric loading and pre-pressing device for a bridge cantilever pouring construction hanging basket. The asymmetric loading and pre-pressing device comprises a No. 0 block at the upper end of a pier body and a hanging basket connected with the No. 0 block, as well as a reaction frame, wherein the side-view projection of the reaction frame is of triangular frameworks; each triangular framework comprises a vertical frame, an underframe and an oblique frame, the reaction frame is provided with the two triangular frameworks, and the two triangular frameworks are connected through a transverse bracing; when the asymmetric loading and pre-pressing device is used, and a jack is arranged between the connection point of the underframe and the oblique frame and a lower cross beam in front of the hanging basket; and the connection ends of the underframe with the oblique frame and the vertical frame are respectively fixedly connected with the No. 0 block. According to the symmetric loading and pre-pressing device disclosed by the utility model, as the reaction frame, the jack, the hanging basket and a box girder constitute a system, force applied for loading the jack against the system is internal force, and a loading test can be performed without enabling the two ends to be symmetrical; and furthermore, a heavy object is not required during the loading test, the workload of the loading test is small and the operation is safe.

Description

The asymmetric loading prepressing device of bridge cantilever pouring construction Hanging Basket
Technical field
The utility model relates to bridge construction, is 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 utility model 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 utility model is realized 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 utility model 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 utility model 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 utility model 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 utility model 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 utility model 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 utility model compared with prior art has following obvious advantage:
The utility model 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
Embodiment 1
As shown in Figure 1, the utility model comprises reaction frame, the rectangular triangular framing of said reaction frame side-looking projection, and 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.
Embodiment 2
As shown in Figure 3, the utility model comprises No. 0 piece 2 of pier shaft 1 upper end, is connected in the Hanging Basket 3 of No. 0 piece 2, also comprises 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.
CN2011205480401U 2011-12-26 2011-12-26 Asymmetric loading and pre-pressing device for bridge cantilever pouring construction hanging basket Expired - Fee Related CN202416193U (en)

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Application Number Priority Date Filing Date Title
CN2011205480401U CN202416193U (en) 2011-12-26 2011-12-26 Asymmetric loading and pre-pressing device for bridge cantilever pouring construction hanging basket

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Application Number Priority Date Filing Date Title
CN2011205480401U CN202416193U (en) 2011-12-26 2011-12-26 Asymmetric loading and pre-pressing device for bridge cantilever pouring construction hanging basket

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425122A (en) * 2011-12-26 2012-04-25 江苏省交通工程集团有限公司 Asymmetric loading prepressing device for hanging basket for bridge cantilever casting construction
CN103674714A (en) * 2013-12-19 2014-03-26 西安建筑科技大学 Joint loading method of cantilever structure
CN111521499A (en) * 2020-05-21 2020-08-11 中国矿业大学(北京) Device and method for asymmetric stress loading of deep-ground engineering similar physical simulation experiment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425122A (en) * 2011-12-26 2012-04-25 江苏省交通工程集团有限公司 Asymmetric loading prepressing device for hanging basket for bridge cantilever casting construction
CN103674714A (en) * 2013-12-19 2014-03-26 西安建筑科技大学 Joint loading method of cantilever structure
CN103674714B (en) * 2013-12-19 2016-02-10 西安建筑科技大学 A kind of loading method of cantilevered structure interior joint
CN111521499A (en) * 2020-05-21 2020-08-11 中国矿业大学(北京) Device and method for asymmetric stress loading of deep-ground engineering similar physical simulation experiment
CN111521499B (en) * 2020-05-21 2021-11-30 中国矿业大学(北京) Device and method for asymmetric stress loading of deep-ground engineering similar physical simulation experiment

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120905

Termination date: 20121226