CN107740351A - A kind of more braced arch rib vertical rotating construction methods of large span - Google Patents
A kind of more braced arch rib vertical rotating construction methods of large span Download PDFInfo
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- CN107740351A CN107740351A CN201710945560.8A CN201710945560A CN107740351A CN 107740351 A CN107740351 A CN 107740351A CN 201710945560 A CN201710945560 A CN 201710945560A CN 107740351 A CN107740351 A CN 107740351A
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- arch rib
- tower
- turning hinge
- jack
- mrow
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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
- E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
Abstract
The present invention relates to method for bridge construction technical field, in particular to a kind of more braced arch rib vertical rotating construction methods of large span.The assembled half of arch rib on buckstay, half of arch rib lower end is connected with the turning hinge on buckstay, after the completion of assembly on buckstay installing tache tower, the main jack that the upper end of main hauling rope is buckled into tower top end with being fixed on is connected, the anchoring lower ends of main hauling rope are on first anchor point of the half of arch rib close to its upper end, the secondary jack that the upper end of secondary hauling rope is buckled into tower top end with being fixed on is connected, the anchoring lower ends of secondary hauling rope are on second anchor point of the half of arch rib close to its lower end, driving master, secondary jack is according to below equation synchronous tension master, secondary hauling rope, half of arch rib lower end is set to be rotated up around turning hinge： The vertical transfer arch rib construction method of the present invention is simple, effectively realizes the accurate adjustment of vertical transfer, improves the stability and security of vertical transfer construction, has great promotional value.
Description
Technical field
The present invention relates to method for bridge construction technical field, in particular to a kind of more braced arch rib vertical transfer construction parties of large span
Method.
Background technology
With the fast development of Bridges in Our Country construction, combination bridge architecture obtains more and more extensive application.Buckstay is soft
Property arch combining structure, advantage in terms of the stress of arch and beam is not fully exerted, main permanent load does not cause the water to bridge pier
Horizontal sliding power, bridge force-bearing performance is improved, can effectively reduce the building height of structure, reduce construction costs.With bridge scale
Increasing, large span, the development characteristic of more arch ribs is just presented in buckstay flexibility arch structure.
Buckstay flexible arch bridge uses first beam rear arch, after the completion of steel truss erection on beam assembled arch rib, after vertical transfer in place
The method joined the two sections of a bridge, etc in the air is a kind of economic, quick, safety construction method.Current sliding roadway arch vertical transfer construction exists following
Difficult point.
1st, more arch rib sliding roadway arch vertical transfers are more due to lifting purlin piece simultaneously, compared with two panels or monolithic arch rib swivel force controlled,
Action synchronization etc. has higher requirement.
2nd, flexible arch rib span is big, and longitudinal rigidity is small, and swivel process deflection is big, and arch rib closure must have precise fine-adjustment
Ability；Swivel process is needed to monitor arch ring stress and deformation, and preventing Suo Li imbalances from causing, arch rib is turned round or local stress is excessive.
3rd, each angle Suo Li size constantly changes during swivel, to ensure synchronization job, and each Suo Li sizes
And the stress matching of major-minor rope, it is necessary to which accuracy controlling is carried out to the speed and pressure of the lifting of each position jack.
4th, during swivel Suo Li all the time be change, button tower offset be also change, during how to ensure tower
It is also a difficult point of this class engineering no more than tolerance zone partially.
Such as the middle promulgated by the State Council of entitled " multi-arch bridge rib vertical turning technical method " of Patent No. " CN101200879A "
Bright patent, the patent describe a kind of method of arch rib vertical transfer, arch ribs connected by two hoist cables, arch rib one end can along bridge to
Rotationally it is articulated and connected on girder, the free end of arch rib and the anchoring lower ends of a hoist cable, the anchoring that places an order of another hoist cable
In the centre position of arch rib, upper end and the Sarasota junction of hoist cable are provided with jack, are acted synergistically by jack and stretch arch
Rib rotates along coercive mechanism.But in fact, how synchronous tension is synchronous tension the problem of needing most consideration in whole work progress
How synchronous it is, how ensures that two hauling ropes both participate in stress tensioning.Because the length and gradient of two hoist cables are all not
The same, if synchronous tension, same rate tensioning, that will cause the hoist cable stress among arch rib to incrementally increase, in arch
The hoist cable stress of rib free end progressively reduces, and such situation is possible to be caused by unbalance stress and destroy arch rib, it is difficult to
Complete vertical transfer construction process.During practice of construction, synchronous operation substantially can only be ensured, typically slow tensioning, observation control arch
The vertical transfer situation of rib, is adjusted to jack in time, and the purpose of safe vertical transfer is reached with this, but due to this observation only
It is the determination of approximate range, can not really reacts the situation of vertical transfer, therefore two hoist cable synchronizations of control completely can not be reached
The effect of running is operated, the safety of arch rib vertical transfer still can not be controlled during practical application.
The content of the invention
Present invention aim to can not be controlled in the existing arch rib vertical transfer for solving to mention in above-mentioned background technology construction
A kind of the problem of two hoist cable lifting synchronisms influence whole arch rib vertical transfer working security, there is provided more braced arch rib vertical transfers of large span
Construction method.
The technical scheme is that：A kind of more braced arch rib vertical rotating construction methods of large span, it is characterised in that：In buckstay
The upper half of arch rib of assembly, half of arch rib lower end is connected with the turning hinge on buckstay, it is assembled after the completion of on buckstay installing tache
Tower, the main jack that the upper end of main hauling rope is buckled to tower top end with being fixed on are connected, and the anchoring lower ends of main hauling rope encircle in one side of something
Rib is on the first anchor point of its upper end, and the secondary jack that the upper end of secondary hauling rope is buckled to tower top end with being fixed on is connected, and pair is led
The anchoring lower ends of straw line drive major and minor jack same according to below equation on the second anchor point of the half of arch rib close to its lower end
The major and minor hauling rope of tensioning is walked, half of arch rib lower end is rotated up around turning hinge：
Wherein：The main hauling rope length of L-between half of arch rib and main jack, m；
The secondary hauling rope length of l-between half of arch rib and secondary jack, m；
R1The distance between-turning hinge and the first anchor point, m；
R2The distance between-turning hinge and the second anchor point, m；
A-turning hinge is the distance between to main jack, m；
B-turning hinge is the distance between to secondary jack, m；
γ-turning hinge to main jack line and turning hinge to the angle between the line of secondary jack, °；
α-turning hinge to main jack line and turning hinge to the angle between the line of the first anchor point, °；
β-turning hinge to the first anchor point line and turning hinge to the angle between the line of the second anchor point, °；
Angle between the anchor points of ε-first and the line and horizontal plane of turning hinge, °；
Keep button tower tower that after tensioning in place, two half of arch ribs are closed up into shape partially in safe range in stretching process
Into complete arch rib, flexible arch rib vertical transfer construction is completed.
Further the method for assembled half of arch rib is on buckstay：Built on buckstay beam face it is multiple along bridge to
Spaced apart support frame, handling are formed on section to the support frame of half of arch rib, section successively assembled connection are formed complete
Half of arch rib.
It is with the method that the turning hinge on buckstay is connected by half of arch rib lower end further：Half of arch rib is assembled to be completed
Afterwards, will be along horizontal cross-bridges between making two pieces of adjacent first otic placodes that the first supporting plate of half of arch rib lower end is inserted into turning hinge
Through hole on to the first rotating shaft that direction is arranged through the first otic placode and the first supporting plate, makes half of arch rib can be around first rotating shaft axle
Line is rotationally articulated and connected in turning hinge.
Further the method for installing tache tower is on buckstay：Hinged-support, handling button tower to hinge are installed on buckstay
Above bearing, the second supporting plate of button tower lower end is set to be inserted on hinged-support between the adjacent otic placode of two panels second, will be along horizontal horizontal stroke
Bridge passes through the through hole on the second otic placode and the second supporting plate to the second rotating shaft that direction is arranged, makes button tower can be around the second shaft axis
Rotationally it is articulated and connected on hinged-support.
Method of the holding button tower tower partially in safe range is in further stretching process：Tower is detained to install with hinged-support
After in place, dorsal funciculus is installed relative to the side of main hauling rope in button tower, the upper end of dorsal funciculus is anchored at and buckles column overhead, anchoring lower ends
On the stretch-draw jack on buckstay is fixed on, makes to buckle tower by tensioning dorsal funciculus and be supported on hinged-support, in stretching process, adjust
Section stretch-draw jack dynamics is button tower tower partially in safe range.
Further two half of arch ribs are closed up and to form the method for complete arch rib and is：Wait to form the two of complete rib structure
After individual half of arch rib vertical transfer in place, handling closure segment is between two half of arch ribs, using welding or bolt by closure segment along bridge
It is fixedly connected respectively with corresponding half of arch rib to both ends, forms complete rib structure.
Further comprise the following steps：
1), build support frame on buckstay, multiple support frames along bridges to arranged for interval, the section of handling one side of something arch rib
To support frame, adjacent segment is connected as one to form complete half of arch rib by welding or bolt arrangement；
2), during half of arch rib assembly, the first supporting plate of half of arch rib lower end is inserted into two of the turning hinge on buckstay
Between the otic placode of block first, to the first otic placode and the first supporting plate on wear along horizontal direction across bridge direction arrange first rotating shaft, make
Half of arch rib can rotationally be articulated and connected in turning hinge around first rotating shaft；
3) between the second supporting plate for detaining tower lower end, is inserted into the otic placode of adjacent two panels second of buckstay upper hinge support,
The second rotating shaft arranged along horizontal transverse direction is worn on to the second otic placode and the second supporting plate, button tower is turned around the second rotating shaft
It is articulated and connected dynamicly on hinged-support；
4) dorsal funciculus, is installed away from the side of half of arch rib in button tower, the upper end of dorsal funciculus is anchored at and buckles column overhead, under dorsal funciculus
End is connected with the stretch-draw jack being arranged on buckstay, and tensioning dorsal funciculus makes to buckle tower to be supported in just with offseting to half of arch rib side
On property beam；
5), major and minor hauling rope, the first anchor point by the anchoring lower ends of main hauling rope in half of arch rib close to its upper end are installed
On, the upper end of main hauling rope is connected with buckleing the main jack of column overhead, and the anchoring lower ends of secondary hauling rope are close in half of arch rib
On second anchor point of its lower end, the upper end of secondary hauling rope is connected with buckleing the secondary jack of column overhead；
6) major and minor jack, is driven according to the major and minor hauling rope of below equation synchronous tension：
Wherein：The main hauling rope length of L-between half of arch rib and main jack, m；
The secondary hauling rope length of l-between half of arch rib and secondary jack, m；
R1The distance between-turning hinge and the first anchor point, m；
R2The distance between-turning hinge and the second anchor point, m；
A-turning hinge is the distance between to main jack, m；
B-turning hinge is the distance between to secondary jack, m；
γ-turning hinge to main jack line and turning hinge to the angle between the line of secondary jack, °；
α-turning hinge to main jack line and turning hinge to the angle between the line of the first anchor point, °；
β-turning hinge to the first anchor point line and turning hinge to the angle between the line of the second anchor point, °；
Angle between the anchor points of ε-first and the line and horizontal plane of turning hinge, °；
7), in stretching process, by stretch-draw jack tensioning dorsal funciculus, the tower of button tower is made to be in all the time in safe range partially,
After half of arch rib tensioning in place, handling closure segment will be closed between the upper end of two half of arch ribs by welding or bolt arrangement
Hold together section to fix with two half of arch ribs, complete the installation of arch rib.
Further described safe range refer to angle between button tower axis and the normal in perpendicular rigid Liang Liang faces be in-
Between 0.3~0.3 °.
Advantages of the present invention has：1st, by quantifying the tensioning speed of major and minor hauling rope, the moment keeps major and minor hauling rope same
When participate in tensioning stress, ensure two hauling ropes synergy tensioning one side of something arch ribs, effectively maintain the security of arch rib vertical transfer
And high efficiency；
2nd, by setting hinged-support, button tower can be made to be moved in a small range, to adjust hauling rope, reaches stable construction
Purpose, improve vertical transfer construction security；
3rd, by finally assembling closure segment, the gap of two half of arch ribs can be fully taken into account, avoids the occurrence of two and half
The situation that side arch rib interferes occurs.
The vertical transfer arch rib construction method of the present invention is simple, effectively realizes the accurate adjustment of vertical transfer, improves vertical transfer construction
Stability and security, there is great promotional value.
Brief description of the drawings
Fig. 1：The structural representation of the present invention；
Fig. 2：The major and minor jack arrangement schematic diagram of the present invention；
Fig. 3：The turning hinge arrangement schematic diagram of the present invention；
Fig. 4：The button tower of the present invention and hinged-support arrangement schematic diagram；
Fig. 5：The half of arch rib of the present invention starts the structural representation of vertical transfer；
Fig. 6：The arch rib of the present invention closes up schematic diagram；
Wherein：1-buckstay；2-half of arch rib；3-turning hinge；4-button tower；5-main hauling rope；6-secondary hauling rope；
7-main jack；8-secondary jack；9-the first anchor point；10-the second anchor point；11-support frame；12-the first supporting plate；
13-the first otic placode；14-first rotating shaft；15-hinged-support；16-the second supporting plate；17-the second otic placode；18-the second turn
Axle；19-dorsal funciculus；20-stretch-draw jack；21-closure segment.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, be the arrangement schematic diagram of the present invention, assembled half of arch rib 2, half of arch rib 2 on buckstay 1
Lower section is supported using support frame 11, and jack is provided with support frame 11, will be partly for adjusting the position of half of arch rib 2
The lower end of side arch rib 2 is connected with the turning hinge 3 on buckstay 1, and the lower end of the half of arch rib 2 of the present embodiment refers to close to corresponding button
The end of the side of tower 4, upper end are the end away from corresponding button tower side.
As shown in figure 3, installing hinged-support 15 on buckstay 1, handling button tower 4 makes the lower end of button tower 4 to the top of hinged-support 15
The second supporting plate 16 be inserted on hinged-support 15 between adjacent the second otic placode of two panels 17, by what is arranged along horizontal direction across bridge direction
Second rotating shaft 18 makes button tower 4 to be rotated around the axis of the second rotating shaft 18 through the through hole on the second otic placode 17 and the second supporting plate 16
Ground is articulated and connected on hinged-support 15.
After the completion of the half of assembly of arch rib 2, the installing tache tower 4 on buckstay 1, as shown in figure 4, installing hinge on buckstay 1
Bearing 15, handling button tower 4 to the top of hinged-support 15, make the lower end of button tower 4 the second supporting plate 16 be inserted into it is adjacent on hinged-support 15
Between the second otic placode of two panels 17, the second rotating shaft 18 arranged along horizontal direction across bridge direction is supported through the second otic placode 17 and second
Through hole on plate 16, button tower 4 is set rotationally to be articulated and connected on hinged-support 15 around the axis of the second rotating shaft 18.
After detaining the installation of tower 4, after button tower 4 is installed in place with hinged-support 15, in button tower 4 relative to the one of main hauling rope 5
Dorsal funciculus 19 is installed in side, and the upper end of dorsal funciculus 19 is anchored at and buckles the tower top of tower 4, tensioning thousand of the anchoring lower ends on buckstay 1 is fixed on
On jin top 20, make to buckle tower 4 by tensioning dorsal funciculus 19 and be supported on hinged-support 15, in stretching process, adjust the power of stretch-draw jack 20
Degree makes the tower of button tower 4 partially in safe range, and the safe range of the present embodiment refers to the button axis of tower 4 and the beam face of perpendicular rigid beam 1
Angle is between -0.3~0.3 ° between normal.
After the installation of dorsal funciculus 19, will button tower 4 vertically tensioning be fixed on buckstay 1, by the upper end of main hauling rope 5 with
The main jack 7 for being fixed on button tower 4 top is connected, and the anchoring lower ends of main hauling rope 5 are in half of arch rib 2 close to the first of its upper end
On anchor point 9, the secondary jack 8 that the upper end of secondary hauling rope 6 is buckled to the top of tower 4 with being fixed on is connected, the anchoring lower ends of secondary hauling rope 6
On second anchor point 10 of the half of arch rib 2 close to its lower end, drive major and minor jack major and minor according to below equation synchronous tension
Hauling rope, the half of lower end of arch rib 2 is set to be rotated up around turning hinge 3：
Wherein：The length of main hauling rope 5 of L-between half of arch rib 2 and main jack 7, m；
The length of secondary hauling rope 6 of l-between half of arch rib 2 and secondary jack 8, m；
R1The distance between anchor point 9 of-turning hinge 3 and first, such as Fig. 1, m；
R2The distance between anchor point 10 of-turning hinge 3 and second, such as Fig. 1, m；
A-turning hinge 3 arrives the distance between main jack 7, such as Fig. 1, m；
B-turning hinge 3 arrives the distance between secondary jack 8, such as Fig. 1, m；
The angle that γ-turning hinge 3 is arrived between the line of secondary jack 8 to the line and turning hinge 3 of main jack 7, such as Fig. 1, °；
The angle that α-turning hinge 3 is arrived between the line of main jack 7 and the line of the anchor point of turning hinge 3 to the first 9, such as Fig. 1, °；
Angle between the line of β-anchor point of turning hinge 3 to the first 9 and the line of the anchor point of turning hinge 3 to the second 10, such as Fig. 1, °；
The anchor points of ε-first 9 and the angle between the line and horizontal plane of turning hinge 3, °；
Button tower 4 tower is kept in stretching process partially in safe range, after tensioning in place, by two half of arch ribs it is 2-in-1 hold together
Complete arch rib is formed, completes flexible arch rib vertical transfer construction.
During practice of construction, major and minor jack and turning hinge 3 are fixing point, distance, the turning hinge of the anchor point of turning hinge 3 to the first 9
The distance between the distance of 3 to the second anchor point 10 and two anchor points are changeless, therefore the R in above-mentioned formula1、R2、A、
B, γ, β and ε are definite value, are constant, variate L, l and α in work progress, therefore above-mentioned formula can regard L and l as
Ratio and α linear function.
Concrete construction method is：1st, build support frame 11 on buckstay 1, multiple support frames 11 along bridge to interval cloth
Put, on section to the support frame 11 of handling one side of something arch rib 2, adjacent segment is connected as one and formed by welding or bolt arrangement
Complete half of arch rib 2；
2nd, when half of arch rib 2 is assembled, the turning hinge 3 that the first supporting plate 12 of the half of lower end of arch rib 2 is inserted on buckstay 1
Two piece of first otic placode 13 between, to the first otic placode 13 and the first supporting plate 12 on wear along horizontal direction across bridge direction arrangement the
One rotating shaft 14, half of arch rib 2 is set rotationally to be articulated and connected in turning hinge 3 around first rotating shaft 14；
The 3rd, the second supporting plate 16 for detaining the lower end of tower 4 is inserted into the otic placode of adjacent two panels second of the upper hinge support 15 of buckstay 1
Between 17, to the second otic placode 17 and the second supporting plate 16 on wear along horizontal transverse direction arrange the second rotating shaft 18, make button tower 4
Can rotationally it be articulated and connected on hinged-support 15 around the second rotating shaft 18；
4th, dorsal funciculus 19 is installed away from the side of half of arch rib 2 in button tower 4, the upper end of dorsal funciculus 19 is anchored at and buckles the tower top of tower 4,
The lower end of dorsal funciculus 19 is connected with the stretch-draw jack 20 on buckstay 1, and tensioning dorsal funciculus 19 makes to buckle tower 4 to half of arch rib 2 one
Offset to the side and be supported on buckstay 1；
The 5th, major and minor hauling rope, the first anchor by the anchoring lower ends of main hauling rope 5 in half of arch rib 2 close to its upper end are installed
On point 9, the upper end of main hauling rope 5 is connected with buckleing the main jack 7 of the tower top of tower 4, and the anchoring lower ends of secondary hauling rope 6 are encircleed in one side of something
On the second anchor point 10 of its lower end, the upper end of secondary hauling rope 6 is connected rib 2 with buckleing the secondary jack 8 of the tower top of tower 4；
6th, major and minor jack is driven according to the major and minor hauling rope of above-mentioned formula synchronous tension：
7th, in stretching process, by the tensioning dorsal funciculus 19 of stretch-draw jack 20, the tower of button tower 4 is made to be in safe range all the time partially
It is interior, after the half of tensioning in place of arch rib 2, between the upper end of the half of arch rib 2 of handling closure segment 21 to two, pass through welding or bolt knot
Structure fixes closure segment 2 and two half of arch ribs 2, completes the installation of arch rib.
The hauling rope of the present embodiment is rotationally to be articulated and connected with the connecting portion for buckleing tower 4 and half of arch rib 2, so as to
Preferably adapt to the change of angle in actual use.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (8)
- A kind of 1. more braced arch rib vertical rotating construction methods of large span, it is characterised in that：The assembled half of arch rib (2) on buckstay (1), Half of arch rib (2) lower end is connected with the turning hinge (3) on buckstay (1), it is assembled after the completion of on buckstay (1) installing tache tower (4) the main jack (7) that the upper end of main hauling rope (5), is buckled to tower (4) top with being fixed on is connected, the lower end of main hauling rope (5) Half of arch rib (2) is anchored on the first anchor point (9) of its upper end, tower (4) is buckled into the upper end of secondary hauling rope (6) with being fixed on Secondary jack (8) series connection on top, the second anchor point of the anchoring lower ends of secondary hauling rope (6) in half of arch rib (2) close to its lower end (10) on, major and minor jack is driven to make half of arch rib (2) lower end around turning hinge according to the major and minor hauling rope of below equation synchronous tension (3) it is rotated up：<mrow> <mfrac> <mi>L</mi> <mi>l</mi> </mfrac> <mo>=</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <mi>A</mi> <mo>&lsqb;</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mi>&alpha;</mi> <mo>-</mo> <mi>&epsiv;</mi> <mo>)</mo> </mrow> <mo>-</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mi>&alpha;</mi> <mo>&rsqb;</mo> </mrow> <mrow> <msub> <mi>R</mi> <mn>2</mn> </msub> <mi>B</mi> <mo>&lsqb;</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mi>&alpha;</mi> <mo>-</mo> <mi>&beta;</mi> <mo>+</mo> <mi>&gamma;</mi> <mo>-</mo> <mi>&epsiv;</mi> <mo>)</mo> </mrow> <mo>-</mo> <mi>cos</mi> <mrow> <mo>(</mo> <mi>&alpha;</mi> <mo>-</mo> <mi>&beta;</mi> <mo>+</mo> <mi>&gamma;</mi> <mo>)</mo> </mrow> <mo>&rsqb;</mo> </mrow> </mfrac> </mrow>Wherein：Main hauling rope (5) length of L-between half of arch rib (2) and main jack (7), m；Secondary hauling rope (6) length of l-between half of arch rib (2) and secondary jack (8), m；R1The distance between-turning hinge (3) and the first anchor point (9), m；R2The distance between-turning hinge (3) and the second anchor point (10), m；A-turning hinge (3) arrives the distance between main jack (7), m；B-turning hinge (3) arrives the distance between secondary jack (8), m；The angle that the line and turning hinge (3) of γ-turning hinge (3) to main jack (7) are arrived between the line of secondary jack (8), °；α-turning hinge (3) to main jack (7) line and turning hinge (3) to the angle between the line of the first anchor point (9), °；β-turning hinge (3) to the first anchor point (9) line and turning hinge (3) to the angle between the line of the second anchor point (10), °；Angle between the anchor points of ε-first (9) and the line and horizontal plane of turning hinge (3), °；Keep button tower (4) tower that after tensioning in place, two half of arch ribs (2) are closed up partially in safe range in stretching process Complete arch rib is formed, completes flexible arch rib vertical transfer construction.
- A kind of 2. more braced arch rib vertical rotating construction methods of large span as claimed in claim 1, it is characterised in that：In buckstay (1) The method of the upper half of arch rib of assembly (2) is：Buckstay (1) Liang Mianshang build it is multiple along bridge to spaced apart support frame (11), handling is formed on section to the support frame (11) of half of arch rib (2), section successively assembled connection is formed complete half of Arch rib (2).
- A kind of 3. more braced arch rib vertical rotating construction methods of large span as claimed in claim 1, it is characterised in that：By half of arch rib (2) lower end is with the method that the turning hinge (3) on buckstay (1) is connected：After the completion of half of arch rib (2) is assembled, make half of arch rib (2) , will be along horizontal direction across bridge between two pieces of adjacent first otic placodes (13) that the first supporting plate (12) of lower end is inserted into turning hinge (3) The first rotating shaft (14) of direction arrangement makes half of arch rib (2) through the through hole on the first otic placode (13) and the first supporting plate (12) Can rotationally it be articulated and connected in turning hinge (3) around first rotating shaft (14) axis.
- A kind of 4. more braced arch rib vertical rotating construction methods of large span as claimed in claim 1, it is characterised in that：In buckstay (1) The method of upper installing tache tower (4) is：Hinged-support (15) is installed on buckstay (1), on handling button tower (4) to hinged-support (15) Side, makes second supporting plate (16) of button tower (4) lower end be inserted on hinged-support (15) between the adjacent otic placode of two panels second (17), will Along the second rotating shaft (18) of horizontal direction across bridge direction arrangement through the through hole on the second otic placode (17) and the second supporting plate (16), make Button tower (4) can rotationally be articulated and connected on hinged-support (15) around the second rotating shaft (18) axis.
- A kind of 5. more braced arch rib vertical rotating construction methods of large span as claimed in claim 1, it is characterised in that：Protected in stretching process Holding method of button tower (4) tower partially in safe range is：After button tower (4) is installed in place with hinged-support (15), in button tower (4) phase For the side installation dorsal funciculus (19) of main hauling rope (5), the upper end of dorsal funciculus (19) is anchored at and buckles tower (4) tower top, anchoring lower ends On the stretch-draw jack (20) being fixed on buckstay (1), make to buckle tower (4) by tensioning dorsal funciculus (19) and be supported in hinged-support (15) on, in stretching process, regulation stretch-draw jack (20) dynamics makes button tower (4) tower partially in safe range.
- A kind of 6. more braced arch rib vertical rotating construction methods of large span as claimed in claim 1, it is characterised in that：By two half of arches Rib (2), which closes up, to be formed the method for complete arch rib and is：After two half of arch rib (2) vertical transfers in place for forming complete rib structure, Handling closure segment (21) between two half of arch ribs (2), using bolt by closure segment (21) along bridge to both ends respectively with it is corresponding Half of arch rib (2) be fixedly connected, form complete rib structure.
- A kind of 7. more braced arch rib vertical rotating construction methods of large span as claimed in claim 1, it is characterised in that：Including following step Suddenly：1) support frame (11), is built on buckstay (1), multiple support frames (11) are along, to arranged for interval, handling is half of to encircle along bridge On the section of rib (2) to support frame (11), adjacent segment is connected as one to form complete half by welding or bolt arrangement Side arch rib (2)；2) when, half of arch rib (2) is assembled, first supporting plate (12) of half of arch rib (2) lower end is inserted on buckstay (1) Between two piece of first otic placode (13) of turning hinge (3), to the first otic placode (13) and the first supporting plate (12) on wear along horizontal cross-bridges The first rotating shaft (14) arranged to direction, makes half of arch rib (2) to be rotationally articulated and connected around first rotating shaft (14) in turning hinge (3) On；3), the second supporting plate (16) that will detain tower (4) lower end is inserted into the adjacent two panels second of buckstay (1) upper hinge support (15) Between otic placode (17), to the second otic placode (17) and the second supporting plate (16) on wear along horizontal transverse direction arrange the second rotating shaft (18) button tower (4), is made rotationally to be articulated and connected around the second rotating shaft (18) on hinged-support (15)；4), the upper end of dorsal funciculus (19) is anchored at and buckles tower away from the side of half of arch rib (2) installation dorsal funciculus (19) in button tower (4) (4) tower top, dorsal funciculus (19) lower end are connected with the stretch-draw jack (20) on buckstay (1), and tensioning dorsal funciculus (19) makes to buckle Tower (4) is supported on buckstay (1) with offseting to half of arch rib (2) side；5), major and minor hauling rope is installed, the first anchor by the anchoring lower ends of main hauling rope (5) in half of arch rib (2) close to its upper end On point (9), the upper end of main hauling rope (5) is connected with buckleing the main jack (7) of tower (4) tower top, by the lower end anchor of secondary hauling rope (6) Gu on second anchor point (10) of the half of arch rib (2) close to its lower end, the upper end of secondary hauling rope (6) and the pair for buckleing tower (4) tower top Jack (8) connects；6) major and minor jack, is driven according to the major and minor hauling rope of below equation synchronous tension：<mrow> <mfrac> <mi>L</mi> <mi>l</mi> </mfrac> <mo>=</mo> <mfrac> <mrow> <msub> <mi>R</mi> <mn>1</mn> </msub> <mi>A</mi> <mo>&lsqb;</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mi>&alpha;</mi> <mo>-</mo> <mi>&epsiv;</mi> <mo>)</mo> </mrow> <mo>-</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mi>&alpha;</mi> <mo>&rsqb;</mo> </mrow> <mrow> <msub> <mi>R</mi> <mn>2</mn> </msub> <mi>B</mi> <mo>&lsqb;</mo> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <mi>&alpha;</mi> <mo>-</mo> <mi>&beta;</mi> <mo>+</mo> <mi>&gamma;</mi> <mo>-</mo> <mi>&epsiv;</mi> <mo>)</mo> </mrow> <mo>-</mo> <mi>cos</mi> <mrow> <mo>(</mo> <mi>&alpha;</mi> <mo>-</mo> <mi>&beta;</mi> <mo>+</mo> <mi>&gamma;</mi> <mo>)</mo> </mrow> <mo>&rsqb;</mo> </mrow> </mfrac> </mrow>Wherein：Main hauling rope (5) length of L-between half of arch rib (2) and main jack (7), m；Secondary hauling rope (6) length of l-between half of arch rib (2) and secondary jack (8), m；R1The distance between-turning hinge (3) and the first anchor point (9), m；R2The distance between-turning hinge (3) and the second anchor point (10), m；A-turning hinge (3) arrives the distance between main jack (7), m；B-turning hinge (3) arrives the distance between secondary jack (8), m；The angle that the line and turning hinge (3) of γ-turning hinge (3) to main jack (7) are arrived between the line of secondary jack (8), °；α-turning hinge (3) to main jack (7) line and turning hinge (3) to the angle between the line of the first anchor point (9), °；β-turning hinge (3) to the first anchor point (9) line and turning hinge (3) to the angle between the line of the second anchor point (10), °；Angle between the anchor points of ε-first (9) and the line and horizontal plane of turning hinge (3), °；7), in stretching process, by stretch-draw jack (20) tensioning dorsal funciculus (19), the tower of button tower (4) is made partially all the time in safety In the range of, after half of arch rib (2) tensioning in place, handling closure segment (21) passes through weldering between the upper end of two half of arch ribs (2) Connect or bolt arrangement is fixed by closure segment (2) and two half of arch ribs (2), complete the installation of arch rib.
- A kind of 8. more braced arch rib vertical rotating construction methods of large span as described in claim 1,5 or 7, it is characterised in that：Described Safe range refers to angle between button tower (4) axis and the normal in perpendicular rigid beam (1) beam face and is between -0.3~0.3 °.
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| CN114875767A (en) * | 2022-05-18 | 2022-08-09 | 中铁工程设计咨询集团有限公司 | Supporting rod type thrust arch bridge and construction method thereof |
| CN111455871B (en) * | 2020-05-19 | 2024-04-19 | 中交路桥建设有限公司 | Sectional vertical rotation structure for arch rib of steel box arch bridge and construction method |
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| CN107740351B (en) | 2019-01-11 |
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