CN109252447A - A kind of precompressed operating method of high-altitude king-post overarm brace - Google Patents
A kind of precompressed operating method of high-altitude king-post overarm brace Download PDFInfo
- Publication number
- CN109252447A CN109252447A CN201811141778.9A CN201811141778A CN109252447A CN 109252447 A CN109252447 A CN 109252447A CN 201811141778 A CN201811141778 A CN 201811141778A CN 109252447 A CN109252447 A CN 109252447A
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- Prior art keywords
- bracket
- king
- post
- precompressed
- hinged
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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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
The present invention relates to science of bridge building fields, disclose a kind of precompressed operating method of high-altitude king-post overarm brace, suitable for bridges such as cable-stayed bridge, suspension bridges, the following steps are included: S1 makes hinged precompressed force transferring structure, hinged precompressed force transferring structure is correspondingly connected with by steel pin and is formed by hinged diagonal brace A, hinged diagonal brace B, force-transmission support seat；S2 constructs to king-post and sets up bracket, and king-post is equipped with for wearing the king-post preformed hole for sending wirerope, and the horizontal sextant angle of king-post preformed hole is 0 °, when king-post is constructed, embedded bracket bracket, upper frame bracket；After completing bracket bracket, the construction of upper frame bracket, bracket is set up on bracket bracket, setting up upper frame between upper frame bracket；S3 installs hinged precompressed force transferring structure, wirerope one end is connected hinged precompressed force transferring structure, one end passes through king-post preformed hole；S4 installs jack, the pulling force applied using jack pair wireropeF n ；S5 dismantles hinged precompressed force transferring structure, jack, completes the precompressed to bracket.
Description
Technical field
The present invention relates to science of bridge building fields, more particularly, to a kind of pre- press operation side of high-altitude king-post overarm brace
Method is suitable for the bridges such as cable-stayed bridge, suspension bridge.
Background technique
When the king-post crossbeam of construction cable-stayed bridge (or suspension bridge), erection template is poured after needing to set up bracket, pre-compression stand
Crossbeam between king-post.In casting concrete structure construction, bracket carries out the purpose of precompressed are as follows: (1) ensures the safety of bracket, protect
Demonstrate,prove construction safety；(2) influence of ground and bracket inelastic deformation is eliminated, it is ensured that the casting quality of cast-in-place concrete structure.Mesh
Before, the pre-pressing bracket conventional method of crossbeam is loaded for use sandbag in bulk or water tank, but due to cable-stayed bridge (or suspension bridge)
The location of crossbeam between king-post height, some are even as high as rice up to a hundred, carry out pre-pressing bracket, sandbag in bulk using conventional method
Or the heavy workload that water tank with water etc. transmits up and down, it is difficult to realize.
Utility model CN201521107875.8 proposes the method for carrying out load precompressed to bracket using wirerope.Pass through
Tensioning both ends are connected to the wirerope of cushion cap and bracket distribution beam, carry out precompressed to bracket.Such as using this method to bracket
Precompressed is carried out, needs the single wire rope of downward lowering wirerope up to rice up to a hundred in some cases, multiple spot precompressed then needs more
Wirerope.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above, provides a kind of high-altitude king-post overarm brace
Precompressed operating method has power-saving function using the hinged precompressed force transferring structure of production, and pre-compressed effect is good, and structure is only
Spy, preparation is simple, is conducive to operation, easy construction, conducive to high altitude operation.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of precompressed operating method of high-altitude king-post overarm brace, including but not limited to following methods:
S1 makes hinged precompressed force transferring structure, and the hinged precompressed force transferring structure is by hinged diagonal brace A, hinged diagonal brace B, power transmission
Support is correspondingly connected with to be formed by steel pin；
S2 constructs to king-post and sets up bracket, and the king-post is equipped with for wearing the king-post preformed hole for sending wirerope, tower
The horizontal sextant angle of column preformed hole is 0 °, when king-post is constructed, embedded bracket bracket, upper frame bracket；Complete bracket bracket, upper frame
After bracket construction, bracket is set up on bracket bracket, setting up upper frame between upper frame bracket；
S3 installs hinged precompressed force transferring structure, wirerope one end is connected hinged precompressed force transferring structure, one end passes through king-post
Preformed hole；
S4 installs jack, applies pulling force F using jack pair wireropen；
S5 dismantles hinged precompressed force transferring structure, jack, upper frame, completes the precompressed to bracket.
Further, the hinged diagonal brace A is made of two fashioned iron and male, and there are gaps between fashioned iron, using steel plate
Corresponding welding makes two fashioned iron form entirety, and hole is reserved in fashioned iron one end, and the other end is welded with using male made of steel plate,
Male reserves hole.
Further, the hinged diagonal brace B is formed with steel plate two fashioned iron of corresponding welding, and there are gap, hinges between fashioned iron
Connect the reserved hole in both ends of diagonal brace B.
Further, the force-transmission support seat by billet and the welding in 90 ° of vertical steel plate is formed, vertical steel plate is equipped with hole
Hole.
Further, the hinged diagonal brace A, hinged diagonal brace B both ends of the hole are away from LxCalculation formula are as follows:
In formula:
LxIt is hinged diagonal brace A, hinged diagonal brace B both ends of the hole away from unit mm；
HjIt is hinged precompressed force transferring structure after S3 installation, the vertical distance in hole center of two force-transmission support seats, unit mm,
In the range of 300~750mm；
θ is hinged precompressed force transferring structure after S3 installation, the hole line of centres of two force-transmission support seats and the folder of hinged diagonal brace
Angle, angular range are 5 °~10 °.
Further, the top surface of the bracket and king-post preformed hole center distance HkCalculation formula are as follows:δ is the hole center of force-transmission support seat to the outer peripheral distance of billet；Cradle top surface is set to upper frame bottom surface
Distance be 2 δ+Hj。
Further, the pulling force F that the jack pair wirerope appliesnCalculation formula are as follows:
In formula:
γcFor the bulk density of crossbeam concrete, unit kN/m3, can be according to 26kN/m3It takes；
VcFor the volume of crossbeam concrete, unit m3；
AvpFor the vertical projection area of crossbeam, unit m2；
qsFor construction loads, unit kN/m2, can be according to 8kN/m2It takes；
NnumNumber for the vertical precompressed active force point of load application applied to bracket.
Compared with prior art, the beneficial effects of the present invention are:
(1) hinged precompressed force transferring structure provided by the invention can realize the pulling force that applies jack pair wirerope to vertical
Precompressed active force is converted, it is often more important that, since angle, θ is limited at 5 °~10 °, to reach using lesser very heavy
Top can obtain large tonnage vertical precompressed active force to the pulling force that wirerope applies, and can reach the effect of " art is good for strength "
Fruit, for example, applying F when angle, θ takes 5 °n=100kN can get vertical precompressed active force 573.7kN；
(2) the pulling force F applied according to the jack pair wirerope being calculatednHinged precompressed force transferring structure is applied
Pressure, it can be ensured that obtaining bracket needs vertical precompressed active force to be offered, to reach good pre-compressed effect；
(3) present invention is by the hinged precompressed force transferring structure force of jack pair, the branch to be exerted a force using king-post as jack
Point realizes the precompressed to bracket by the vertical force component of hinged diagonal brace A axle power.The method of the present invention is unique, preparation is simple, is conducive to behaviour
Make, easy construction, is conducive to high altitude operation；Fundamentally solve traditional technology high altitude operation, sandbag or water tank with water in bulk etc.
The heavy workload transmitted up and down, it is difficult to which the method that the technological deficiency and utility model CN201521107875.8 of realization provide needs
The technological deficiency of too long wirerope；And the components such as hinged precompressed force transferring structure used are reusable；The present invention provides simultaneously
Technical solution is complete, unique, feasible.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of hinged diagonal brace A, and wherein Fig. 1 a is the elevation of the structure of hinged diagonal brace A, and Fig. 1 b is hinge
The plan view of the structure of hinged diagonal brace A.
Fig. 2 is the structural schematic diagram of hinged diagonal brace B, and wherein Fig. 2 a is the elevation of the structure of hinged diagonal brace B, and Fig. 2 b is hinge
Connect the plan view of the structure of diagonal brace B.
Fig. 3 is the structural facades figure of hinged precompressed force transferring structure.
Fig. 4 is the structural schematic diagram of king-post 1 and crossbeam 2.
Fig. 5 is the elevation of the precompressed of overarm brace.
Fig. 6 is the half plan of the precompressed of overarm brace.
Wherein, 1-king-post, 2-crossbeams, 3-brackets, 4-hinged precompressed force transferring structures, the hinged diagonal brace of hinged the diagonal brace A, 4b-of 4a-
The vertical steel plate of B, 4c-male, 4d-force-transmission support seat, 4e-billet, 4f-, 4g-steel pin, 5-king-post preformed holes, 6-jack, 7-
Bracket bracket, 8-upper frame brackets, 9-wirerope, 10-upper frames.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；In order to better illustrate this embodiment, attached
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of positional relationship is described in attached drawing
Illustrate, should not be understood as the limitation to this patent.
Embodiment 1
As shown in figure 4, the size of the crossbeam 2 in the present embodiment between two king-posts 1 of cable-stayed bridge are as follows: a=6.0m, b=
3.0m, h=2.0m.Crossbeam is apart from bridge floor 81.5m.For the concrete for pouring the crossbeam 2, need to carry out the bracket 3 of crossbeam 2 pre-
Pressure.
Simply, quickly and efficiently to carry out precompressed to the bracket 3 of crossbeam 2, the pre- of bracket 3 is carried out using the method for the present invention
Pressure, construction carry out in the steps below:
S1 makes hinged precompressed force transferring structure 4, and hinged precompressed force transferring structure 4 is by hinged diagonal brace A4a, hinged diagonal brace B4b, biography
Power support 4d is correspondingly connected with to be formed by steel pin 4g.
Specifically, hinged diagonal brace A4a is made of two fashioned iron and male 4c, and there are gaps between fashioned iron, using steel plate pair
Should weld makes two fashioned iron form entirety, and hole is reserved in fashioned iron one end, and the other end is welded with using male 4c made of steel plate,
Male 4c reserves hole.
Specifically, hinged diagonal brace B4b is formed with steel plate two fashioned iron of corresponding welding, and there are gaps between fashioned iron, hinged oblique
Support the reserved hole in both ends of B4b.
Specifically, force-transmission support seat 4d by billet 4e and vertical steel plate 4f it is in 90 ° welding formed, vertical steel plate 4f is equipped with
Hole, in this example, the hole center of force-transmission support seat 4d to the outer peripheral distance δ=50mm of billet 4e.
Wherein, hinged diagonal brace A4a, hinged diagonal brace B4b both ends of the hole are away from LxCalculation formula are as follows:Unit is
Mm,
HjIt is hinged precompressed force transferring structure 4 after S3 installation, the vertical distance in hole center of two force-transmission support seat 4d, unit is
Mm, can use 300~750mm, and this example takes Hj=500mm；
θ is hinged precompressed force transferring structure 4 after S3 installation, the hole line of centres and the hinged diagonal brace of two force-transmission support seat 4d
Angle, angular range are 5 °~10 °, and this example takes θ=7.5 °.
Then
S2 constructs to king-post 1 and sets up bracket 3, and king-post 1 is equipped with for wearing the king-post preformed hole 5 for sending wirerope 9, tower
The horizontal sextant angle of column preformed hole 5 is 0 °, top surface and the 5 center distance H of king-post preformed hole of bracket 3kCalculation formula are as follows:When king-post 1 is constructed, embedded bracket bracket 7, upper frame bracket 8；Complete bracket ox
After leg 7, upper frame bracket 8 are constructed, bracket 3 is set up on bracket bracket 7, setting up upper frame 10 between upper frame bracket 8.
After king-post 1 is constructed, the distance of 3 top surface of bracket to 10 bottom surface of upper frame is set as (2 δ+Hj)=(2x50+500)=
600mm。
S3 installs hinged precompressed force transferring structure 4,9 one end of wirerope is connected hinged precompressed force transferring structure 4, one end passes through tower
Column preformed hole 5.By the billet 4e of two force-transmission support seat 4d of hinged precompressed force transferring structure 4 respectively with 3 top surface of bracket, upper frame
10 bottom surfaces are welded to connect；King-post preformed hole 5 is passed through after catching hinged precompressed force transferring structure 4 with wirerope 9.
S4 installs jack 6, applies pulling force F to wirerope 9 using jack 6n.Jack 6 is installed, jack 6 is utilized
Pulling force, the pulling force F that jack 6 applies wirerope 9 are applied to wirerope 9nIt acquires as the following formula
The pulling force F that jack 6 applies wirerope 9nCalculation formula are as follows:
In formula:
γcFor the bulk density of 2 concrete of crossbeam, unit kN/m3, this example is according to 26kN/m3It takes；
VcFor the volume of 2 concrete of crossbeam, V is obtained by crossbeam intended sizec=axbxh=6x3x2=36m3；
AvpFor the vertical projection area of crossbeam 2, A is obtained by the planar dimension that crossbeam givesvp=axb=6x3=18m2；
qsFor construction loads, unit kN/m2, this example is according to 8kN/m2It takes；
NnumNumber for the vertical precompressed active force point of load application applied to bracket 3, this example Nnum=6.
It brings into, obtains the pulling force that jack 6 applies wirerope 9:
S5 dismantles hinged precompressed force transferring structure 4, jack 6, upper frame 10, completes the precompressed to bracket 3.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (7)
1. a kind of precompressed operating method of high-altitude king-post overarm brace, it is characterised in that: include but is not limited to following steps:
S1 makes hinged precompressed force transferring structure (4), and the hinged precompressed force transferring structure (4) is by hinged diagonal brace A (4a), hinged diagonal brace
B (4b), force-transmission support seat (4d) are correspondingly connected with to be formed by steel pin (4g)；
S2 constructs to king-post (1) and is set up bracket (3), and the king-post (1) is equipped with send the king-post of wirerope (9) pre- for wearing
It boxes out (5), the horizontal sextant angle of king-post preformed hole (5) is 0 °, when king-post (1) is constructed, embedded bracket bracket (7), upper frame bracket
(8)；After completing bracket bracket (7), upper frame bracket (8) construction, bracket (3) is set up on bracket bracket (7), sets up upper frame
(10) between upper frame bracket (8)；
S3 installs hinged precompressed force transferring structure (4), wirerope (9) one end is connected hinged precompressed force transferring structure (4), one end passes through
King-post preformed hole (5)；
S4 installs jack (6), applies pulling force F to wirerope (9) using jack (6)n；
S5 dismantles hinged precompressed force transferring structure (4), jack (6), upper frame (10), completes the precompressed to bracket (3).
2. a kind of precompressed operating method of high-altitude king-post overarm brace according to claim 1, it is characterised in that: the hinge
It meets diagonal brace A (4a) to be made of two fashioned iron and male (4c), there are gaps between fashioned iron, make two types using the corresponding welding of steel plate
Steel forms entirety, and hole is reserved in fashioned iron one end, and the other end is welded with using male made of steel plate (4c), and male (4c) is reserved
Hole.
3. a kind of precompressed operating method of high-altitude king-post overarm brace according to claim 2, it is characterised in that: the hinge
It meets diagonal brace B (4b) to be formed by steel plate two fashioned iron of corresponding welding, there are gap between fashioned iron, the both ends of hinged diagonal brace B (4b) are equal
Reserved hole.
4. a kind of precompressed operating method of high-altitude king-post overarm brace according to claim 3, it is characterised in that: the biography
Power support (4d) by billet (4e) and vertical steel plate (4f) welding in 90 ° is formed, vertical steel plate (4f) is equipped with hole.
5. a kind of precompressed operating method of high-altitude king-post overarm brace according to any one of claims 1 to 4, feature exist
In: the hinged diagonal brace A (4a), hinged diagonal brace B (4b) both ends of the hole are away from LxCalculation formula are as follows:
In formula:
HjFor the vertical distance in hole center of two force-transmission support seats (4d), HjRange be 300~750mm；
θ is the hole line of centres of two force-transmission support seats (4d) and the angle of hinged diagonal brace, and the range of θ is 5 °~10 °.
6. a kind of precompressed operating method of high-altitude king-post overarm brace according to claim 4, it is characterised in that: the branch
The top surface of frame (3) and king-post (1) preformed hole center distance HkCalculation formula are as follows:δ is force-transmission support seat (4d)
Hole center to billet (4e) outer peripheral distance；Set bracket (3) top surface to the distance of upper frame (10) bottom surface as 2 δ+
Hj。
7. a kind of precompressed operating method of high-altitude king-post overarm brace according to claim 1, it is characterised in that: described thousand
The pulling force F that jin top applies wireropenCalculation formula are as follows:
In formula:
γcFor the bulk density of crossbeam (2) concrete；
VcFor the volume of crossbeam (2) concrete；
AvpFor the vertical projection area of crossbeam (2)；
qsFor construction loads；
NnumNumber for the vertical precompressed active force point of load application applied to bracket (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811141778.9A CN109252447B (en) | 2018-09-28 | 2018-09-28 | Prepressing operation method of high-altitude tower column cross beam support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811141778.9A CN109252447B (en) | 2018-09-28 | 2018-09-28 | Prepressing operation method of high-altitude tower column cross beam support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109252447A true CN109252447A (en) | 2019-01-22 |
| CN109252447B CN109252447B (en) | 2020-07-28 |
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ID=65048564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811141778.9A Active CN109252447B (en) | 2018-09-28 | 2018-09-28 | Prepressing operation method of high-altitude tower column cross beam support |
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| CN (1) | CN109252447B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338163A (en) * | 2021-04-30 | 2021-09-03 | 广西北投交通养护科技集团有限公司 | Opposite-pulling combined device for bridge tower inclined support and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11181725A (en) * | 1997-12-22 | 1999-07-06 | Maeda Corp | Method for constructing horizontal beam of main tower made of concrete |
| CN202881856U (en) * | 2012-10-19 | 2013-04-17 | 中铁三局集团有限公司 | Concrete pouring support prepressing device |
| CN106400694A (en) * | 2016-11-14 | 2017-02-15 | 中交第二航务工程局有限公司 | Fabricated prestressing device and method for high pier scaffoldings |
| CN106677070A (en) * | 2016-12-31 | 2017-05-17 | 中铁局集团有限公司 | Construction support and method for overhead large-span heavy-duty cross beam |
| CN108487084A (en) * | 2018-06-14 | 2018-09-04 | 中铁十六局集团第三工程有限公司 | Prefabricating load for No. 0 block temporary support brackets of bridge applies structure |
-
2018
- 2018-09-28 CN CN201811141778.9A patent/CN109252447B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11181725A (en) * | 1997-12-22 | 1999-07-06 | Maeda Corp | Method for constructing horizontal beam of main tower made of concrete |
| CN202881856U (en) * | 2012-10-19 | 2013-04-17 | 中铁三局集团有限公司 | Concrete pouring support prepressing device |
| CN106400694A (en) * | 2016-11-14 | 2017-02-15 | 中交第二航务工程局有限公司 | Fabricated prestressing device and method for high pier scaffoldings |
| CN106677070A (en) * | 2016-12-31 | 2017-05-17 | 中铁局集团有限公司 | Construction support and method for overhead large-span heavy-duty cross beam |
| CN108487084A (en) * | 2018-06-14 | 2018-09-04 | 中铁十六局集团第三工程有限公司 | Prefabricating load for No. 0 block temporary support brackets of bridge applies structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338163A (en) * | 2021-04-30 | 2021-09-03 | 广西北投交通养护科技集团有限公司 | Opposite-pulling combined device for bridge tower inclined support and construction method |
| CN113338163B (en) * | 2021-04-30 | 2021-12-14 | 广西北投交通养护科技集团有限公司 | Opposite-pulling combined device for bridge tower inclined support and construction method |
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