CN206859084U - The system that Internal force of support is reduced during girder steel symmetric double free cantilever erection - Google Patents
The system that Internal force of support is reduced during girder steel symmetric double free cantilever erection Download PDFInfo
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- CN206859084U CN206859084U CN201720613262.4U CN201720613262U CN206859084U CN 206859084 U CN206859084 U CN 206859084U CN 201720613262 U CN201720613262 U CN 201720613262U CN 206859084 U CN206859084 U CN 206859084U
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- pier
- support
- pad
- girder
- steel
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Abstract
The utility model discloses the system that Internal force of support is reduced during a kind of girder steel symmetric double free cantilever erection, it is related to science of bridge building field, it is included in the steel girder erection scope of operation set at bridge pier, the pier collateral branch frame set respectively in bridge pier both sides, to some internode steel truss girders of the assembled extension in bridge pier both sides in bridge pier pier top and pier collateral branch frame, pier top pad is provided between bridge pier pier top and steel truss girder, by pier jacking apparatus and support pad are additionally provided between top of support and steel truss girder, and jacking apparatus is located at the side that pier top pad is leaned on by support pad, support pad includes the basic pad of bottom and some pieces of regulation cushion blocks that can be extracted at top.The load that the utility model pier collateral branch frame is undertaken will greatly reduce, and so as to improve design margin evaluation, reduce construction risk.
Description
Technical field
The utility model is related to science of bridge building field, in particular to it is a kind of set up support in girder steel and carry out double cantilevers symmetrically spell
The construction method of Internal force of support is reduced during dress.
Background technology
Girder steel symmetric double free cantilever erection construction technology is widely used in current bridge construction field, and general construction method is,
The mounting bracket by pier, by equipment such as tower crane, crane barges, it will be spelled on the internode of pier top two or four internode steel beam liftings to support
Dress, then, girder steel is toward both direction symmetric double free cantilever erection.
During girder steel symmetric double free cantilever erection, in vertical direction, girder steel is by both sides pier-side bracket and bridge pier totally three
Support.During because of cantilever erection, under Gravitative Loads downwarp will occur for girder steel, and downwarp amount is increasingly come, and ultimately forms and is similar to
The arced configuration of " ⌒ " shape.
Under such a stress, institute's Distributing loads are uncoordinated between main pier and pier collateral branch frame, and stiffness of support is bigger, support
The load finally shared will be bigger, so that support is in unfavoured state.
Utility model content
The purpose of this utility model is：In view of the deficienciess of the prior art, propose that a kind of girder steel symmetric double cantilever is spelled
Support, which takes out backing plate internal force, during dress reduces method, and the load that pier collateral branch frame is undertaken will greatly reduce, and is safely so as to improve structure
Number, reduce construction risk.
The utility model purpose is realized by following technical proposals：
The system that Internal force of support is reduced during a kind of girder steel symmetric double free cantilever erection, is included in the steel girder erection set at bridge pier
The scope of operation, the pier collateral branch frame set respectively in bridge pier both sides, extend in bridge pier pier top and pier collateral branch frame to bridge pier both sides is assembled
Some internode steel truss girders, be provided with pier top pad between bridge pier pier top and steel truss girder, also set between top of support and steel truss girder by pier
There are jacking apparatus and support pad, and jacking apparatus is located at the side that pier top pad is leaned on by support pad, support pad includes bottom
The regulation cushion block that the basic pad in portion and some pieces of top can extract.
Alternatively, support pad contact supports steel truss girder, and now jacking apparatus does not contact with steel truss girder；Or jacking
Device contact supports steel truss girder, and now support pad does not contact with steel truss girder.
As further selection, jacking apparatus is jack.
Alternatively, basic pad is made up of some pieces of hassock block stackings, and regulation cushion block is the thin cushion block of stacking.
The foregoing main scheme of the utility model and its each further selection scheme can be with independent assortments to form multiple schemes,
The scheme that can be used and be claimed for the utility model；And the utility model, (each non conflicting selection) selection between and and
Can also independent assortment between other selections.Those skilled in the art after the utility model is understood according to prior art and
Common knowledge, which can understand, multiple combinations, is the claimed technical scheme of the utility model, does not do exhaustion herein.
The course of work is：By during the double free cantilever erections of girder steel, when free cantilever erection girder steel to a certain internode,
Support pad fulcrum is jacked by jack to come to nothing, and part regulation cushion block is then taken out, to eliminate now pier collateral branch frame
The load shared, load whole or the overwhelming majority are transferred on bridge pier.Hereafter, symmetrical free cantilever erection girder steel is continued to most
Great cantilever length, and then supreme pier state, the load that pier collateral branch frame is undertaken will greatly reduce, and be safely so as to improve structure
Number, reduce construction risk.
The beneficial effects of the utility model：Effectively it can be reduced during the utility model girder steel symmetric double free cantilever erection in support
Power, so as to improve design margin evaluation, reduce construction risk.
Brief description of the drawings
Fig. 1 is steel truss girder pier top internode view assembled on support；
Fig. 2 is the partial enlarged drawing of X section in Fig. 1；
Fig. 3 is the double free cantilever erections of steel truss girder to view between Section 5；
Fig. 4 is the partial enlarged drawing of X section in Fig. 3；
Fig. 5 is that support takes out jack top lifting view in cushion block step；
Fig. 6 is the partial enlarged drawing of X section in Fig. 5；
Fig. 7 is that support is taken out cushion block view is taken out in cushion block step；
Fig. 8 is the partial enlarged drawing of X section in Fig. 7；
Fig. 9 is the supreme pier view of the double free cantilever erections of steel truss girder；
Figure 10 is the partial enlarged drawing of X section in Fig. 9；
Wherein 1-bridge pier, 2-pier collateral branch frame, 3-steel truss girder, 4-pier top connect temporarily, 5-pier top pad, 6-support
Pad, 7-jack, 8-common cushion block, 9-thin cushion block.
Embodiment
Following non-limiting examples are used to illustrate the utility model.
The system that Internal force of support is reduced during a kind of girder steel symmetric double free cantilever erection, is included in the girder steel frame set at bridge pier 1
If the scope of operation, the pier collateral branch frame 2 that is set respectively in the both sides of bridge pier 1, spelled in the pier top of bridge pier 1 and pier collateral branch frame 2 to the both sides of bridge pier 1
Some internode steel truss girders 3 of extension are filled, pier top pad 5 are provided between the pier top of bridge pier 1 and steel truss girder 2, pier collateral branch frame 2 pushes up and steel truss
Jacking apparatus (such as jack 7 of the present embodiment) and support pad 6 are additionally provided between beam 3, and jack 7 is located at support pad
The side of pier top pad 5 is leaned on 6 sides, and support pad 6 includes the basic pad of bottom and some pieces of spacers that can be extracted at top
Block.Alternatively, basic pad is made up of the stacking of common cushion block 8 of some pieces of hassock blocks, and regulation cushion block is the thin cushion block of stacking
9.The system is in use, the contact of support pad 6 supports steel truss girder 3, and now jack 7 does not contact with steel truss girder 3；It is or very heavy
The contact of top 7 supports steel truss girder 3, and now support pad 6 does not contact with steel truss girder 3.
So that 112m at certain bridge pier is across steel girder erection as an example, 10 internodes are often set altogether across girder steel, set at the bridge pier
Put a steel girder erection scope of operation.
As shown in Figure 1, 2, pier collateral branch frame 2 is set respectively in the both sides of bridge pier 1, and four internodes of pier top are lifted to pier by tower crane
Assembly is carried out on collateral branch's frame 2, and assembly is set a roof beam in place and uses erection crane；Pier top pad 5, pier collateral branch are provided between pier top and steel truss girder 3
Frame 2 pushes up and jacking apparatus (such as jack 7 of the present embodiment) and support pad 6 is provided between steel truss girder 3, and 7, jack
In the inner side by pier top pad 5, the basic pad of support pad 6 including bottom (such as some pieces of common cushion blocks 8 of the present embodiment
Stacking composition) and some pieces of top adjust cushion blocks (such as thin cushion block 9 of the present embodiment)；
As shown in Figure 3,4, saved from erection crane toward remaining internode steel truss girder 3 of both sides symmetric double free cantilever erection to span centre
Between；
Be computed analyzing, taken out at support pad 6 the thin thickness of cushion block 9 be respectively 0mm, -10mm, -15mm, -20mm, -
In the case of 25mm, the load that fulcrum is shared with fulcrum at pier top pad 5 at support pad 6 is expressed as below respectively.
Therefore, as shown in Fig. 5 to 8, in order to improve the stress of pier collateral branch frame 2, after being computed analysis, consider respectively the
5th, during six internode installations, the 10mm at the top of support pad 6 thin cushion block 9 is extracted out respectively at twice, altogether 20mm, this takes out
Take under height, extract add up deformation difference more than this time extraction height by caused by thin (10mm) after-poppet of cushion block 9 pad 6 every time
Spend (10mm), it is maximum cantilever state to extract (overall to extract height 20mm) support pad 6 after thin cushion block 9 for 2 times and undertake load
The 40%~60% of the maximum weighted state being issued to, so as to by the first six internode steel truss girder 3 it is assembled when pier collateral branch frame 2 is formed
Load transfer on bridge pier 1.Specific implementation is：After five internodes is inserted into, by being arranged in the top branch of pier collateral branch frame 2
The side of frame pad 6 jacks up steel truss girder 3 so that pad, which is come to nothing, at support pad 6 is in by the jack 7 of the side of pier top pad 5
Relaxed state, thereafter according to needs are calculated, take out the thin cushion blocks 9 of 10mm；After the completion of 6th internode is set up, then with same side
Method, the thin cushion blocks 9 of 10mm are taken out at support pad 6.
As shown in Fig. 9,10, steel truss girder 3 continues the supreme pier state of double free cantilever erections.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (4)
1. the system of Internal force of support is reduced during a kind of girder steel symmetric double free cantilever erection, it is characterised in that：It is included at bridge pier and sets
The steel girder erection scope of operation, the pier collateral branch frame set respectively in bridge pier both sides, to bridge pier two in bridge pier pier top and pier collateral branch frame
Some internode steel truss girders of other assembled extension, pier top pad, pier side top of support and steel truss are provided between bridge pier pier top and steel truss girder
Jacking apparatus and support pad are additionally provided between beam, and jacking apparatus is located at the side that pier top pad is leaned on by support pad, support
Pad includes the basic pad of bottom and some pieces of regulation cushion blocks that can be extracted at top.
2. the system of Internal force of support is reduced during girder steel symmetric double free cantilever erection as claimed in claim 1, it is characterised in that：Support
Pad contact supports steel truss girder, and now jacking apparatus does not contact with steel truss girder；Or jacking apparatus contact support steel truss girder, this
When support pad do not contacted with steel truss girder.
3. the system of Internal force of support is reduced during girder steel symmetric double free cantilever erection as claimed in claim 2, it is characterised in that：Jacking
Device is jack.
4. the system of Internal force of support is reduced during girder steel symmetric double free cantilever erection as claimed in claim 1, it is characterised in that：Basis
Pad is made up of some pieces of hassock block stackings, and regulation cushion block is the thin cushion block of stacking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613262.4U CN206859084U (en) | 2017-05-27 | 2017-05-27 | The system that Internal force of support is reduced during girder steel symmetric double free cantilever erection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720613262.4U CN206859084U (en) | 2017-05-27 | 2017-05-27 | The system that Internal force of support is reduced during girder steel symmetric double free cantilever erection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206859084U true CN206859084U (en) | 2018-01-09 |
Family
ID=60824511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720613262.4U Expired - Fee Related CN206859084U (en) | 2017-05-27 | 2017-05-27 | The system that Internal force of support is reduced during girder steel symmetric double free cantilever erection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206859084U (en) |
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2017
- 2017-05-27 CN CN201720613262.4U patent/CN206859084U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180109 Termination date: 20210527 |