CN110409305A - Continuous composite beam bridge hogging moment area crack resistence construction equipment, construction method and beam bridge - Google Patents
Continuous composite beam bridge hogging moment area crack resistence construction equipment, construction method and beam bridge Download PDFInfo
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- CN110409305A CN110409305A CN201910640837.5A CN201910640837A CN110409305A CN 110409305 A CN110409305 A CN 110409305A CN 201910640837 A CN201910640837 A CN 201910640837A CN 110409305 A CN110409305 A CN 110409305A
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- hogging moment
- moment area
- concrete roof
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- 238000010276 construction Methods 0.000 title claims abstract description 66
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 238000004873 anchoring Methods 0.000 claims abstract description 81
- 238000004080 punching Methods 0.000 claims abstract description 61
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 55
- 239000010959 steel Substances 0.000 claims abstract description 55
- 238000000465 moulding Methods 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 8
- 238000005345 coagulation Methods 0.000 claims description 7
- 230000015271 coagulation Effects 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 25
- 238000007906 compression Methods 0.000 abstract description 25
- 230000008676 import Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 14
- 238000005336 cracking Methods 0.000 description 10
- 238000009408 flooring Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 239000004035 construction material Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of continuous composite beam bridge hogging moment area crack resistence construction equipment, construction method and beam bridges.Wherein, construction equipment includes resistance to plucking not shear connector, anchoring piece, drag-line and punching jack.Shear connector is not used to be arranged in the top of hogging moment area girder steel resistance to plucking；When pouring hogging moment area concrete roof at the top of the girder steel of hogging moment area, in hogging moment area, the anchoring piece with drag-line is arranged in the length direction both ends of concrete roof, punching jack is arranged between the anchoring piece at length direction both ends of hogging moment area concrete roof, wherein, the other end of drag-line on the anchoring piece of one end in both ends is connect with one end of punching jack, the other end of drag-line on the anchoring piece of the other end in both ends is connect with the other end of punching jack, punching jack is used to apply pulling force for drag-line, to import compression to hogging moment area concrete roof, hogging moment area concrete roof is avoided to crack, construction is simple, it is at low cost, equipment may be reused.
Description
Technical field
The present invention relates to beam bridge structure field of engineering technology more particularly to a kind of continuous composite beam bridge hogging moment area crack resistences
Construction equipment, construction method and beam bridge.
Background technique
As shown in Figure 1, being made of concrete slab 300 and girder steel 200, between the two for typical three stride continuous composite beam bridge
Connected by shear connector 400 formed it is whole, shear connector 400 can transmit girder steel 200 and 300 interface of concrete slab it
Between shearing, guarantee both cooperative transformation, thus formed compound action sagging moment effect when, concrete slab 300 can be made
In compression, girder steel 200 is in the state of tension, gives full play to the mechanical characteristic of two kinds of materials, lift structure rigidity and carrying
Power.
However, as shown in Fig. 2, being internal force diagram of the continuous crossover shown in FIG. 1 under typical condition, it can be seen that although
Span centre is in sagging moment effect, is conducive to the advantage for playing composite structure, but near support 100, composite beam bridge bears bright
Aobvious hogging moment effect, concrete slab 300 is in tension at this time, and girder steel 200 is in the unfavoured state being pressurized, concrete slab 300
Probably due to tensile stress is excessive and cracks, the durability of structure is influenced.
To solve the problems, such as continuous composite beam bridge hogging moment area cracking, there are mainly two types of modes at present, and one is to hogging moment
The concrete slab in area applies prestressing force, the tensile stress generated when being runed by importing certain compression counteracting beam bridge, but by
Compound action, the deformation of concrete slab under prestress are formd by shear connector and girder steel in hogging moment area concrete slab
By the constraint of girder steel, prestressed importing degree is very low at this time, and a big chunk prestressing force is born by girder steel, causes to generally require
It configures many prestressing tendons and is just able to satisfy design requirement, cause construction cost to increase, construction period is elongated.Another is solved
The method of hogging moment area problem of Cracking is to arrange a certain number of resistance to pluckings not shear connector in hogging moment area girder steel upper limb, this
Connector can discharge the constraint between girder steel and concrete slab, so that the concrete slab under hogging moment effect will not be with girder steel
Deformation and generate tensile stress, and when applying prestressing force, whole prestressing force can be applied on concrete slab.
Although can prevent the cracking of hogging moment concrete slab using prestressing force, construction cost increases, and constructs week
Phase is longer, and prestressed technique is also complex；Shear connector can not discharge hogging moment concrete slab and steel to arrangement resistance to plucking
The compound action of beam, but additional compression counteracting concrete slab can not be provided and answered in the drawing shunk with generated under temperature load
Power, hogging moment concrete slab still can crack.Therefore, it is more cheap to need a kind of cost, constructs more simple, and constructs more
Rapid crack resistence technology, prevents the cracking of hogging moment concrete slab, the endurance quality of lift structure.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, one object of the present invention
It is to propose a kind of continuous composite beam bridge hogging moment area crack resistence construction equipment, can be not only led for hogging moment area concrete roof
Enter sufficient compression, prevent the cracking of hogging moment area concrete roof, moreover, the construction equipment is low in cost, construction is more
Simple and rapid, without increasing additional construction cost in work progress, construction equipment may be reused.
The continuous composite beam bridge hogging moment area crack resistence construction equipment of embodiment according to a first aspect of the present invention, comprising:
Resistance to plucking not shear connector, the resistance to plucking not shear connector for being arranged in continuous composite beam bridge hogging moment area steel
The top of beam；
Anchoring piece, when be disposed with the resistance to plucking do not pour at the top of the hogging moment area girder steel of shear connector it is negative
When moment of flexure area concrete roof, the anchor is respectively correspondingly set at the length direction both ends of the hogging moment area concrete roof
Firmware, the lower part of the anchoring piece is for being anchored in the hogging moment area concrete roof；
Drag-line, the top of the anchoring piece are connect with one end of the drag-line；
Punching jack, when hogging moment area concrete roof molding, the punching jack setting is described negative
Between the anchoring piece at the length direction both ends of moment of flexure area concrete roof, wherein the hogging moment area concrete roof
One end of the other end of the drag-line on the anchoring piece of one end in length direction both ends and the punching jack connects
Connect, the drag-line on the anchoring piece of the other end in the length direction both ends of the hogging moment area concrete roof it is another
One end is connect with the other end of the punching jack, and the punching jack is used to apply pulling force for the drag-line, makes institute
It states hogging moment area concrete roof and is pressurized and axial deformation occurs.
The continuous composite beam bridge hogging moment area crack resistence construction equipment of embodiment according to a first aspect of the present invention, in use,
First by a certain number of resistance to pluckings, shear connector is not arranged in the top of hogging moment area girder steel, then on the top of hogging moment area girder steel
Portion's casting hogging moment area concrete roof, while pouring hogging moment area concrete roof, in hogging moment area concrete roof
Length direction both ends respectively with the anchoring piece of drag-line, after the molding of hogging moment area concrete roof, then by hogging moment area coagulation
The other end of drag-line on the anchoring piece at the length direction both ends of native top plate is respectively correspondingly connect with the both ends of punching jack,
Punching jack is loaded, pulling force is applied to drag-line, pulling force is passed to anchoring piece by drag-line, and pulling force is passed to hogging moment by anchoring
Area's concrete roof forms a Structure Under Axial Compression to hogging moment area concrete roof, at this time due to hogging moment area concrete roof
It is that shear connector is not connected by resistance to plucking with hogging moment area girder steel, hogging moment area girder steel will not constrain hogging moment area concrete
The deformation of top plate, therefore apparent axial deformation can occur under the action of axle power for hogging moment area concrete roof.Pass through change
The size of punching jack pulling force can directly control the axle power of hogging moment area concrete roof, and then it is mixed to control hogging moment area
The axial deformation of solidifying soil top plate, the deflection is horizontal directly related with later period hogging moment area concrete roof axial compression stress,
If axial deformation is big, the compression deposit of hogging moment area concrete roof is just higher.
The continuous composite beam bridge hogging moment area crack resistence construction equipment of first aspect present invention embodiment can be hogging moment
Area's concrete roof imports sufficient compression, can in bridge use process so as to offset hogging moment area concrete roof
Can generate tensile stress, guarantee in the case where no configuration presstressed reinforcing steel, floorings be under action of long-term load by
Pressure condition prevents the cracking of hogging moment area concrete roof, really promotes the endurance quality of bridge structure.Moreover, the construction is set
It is standby low in cost, construct more simple and be not necessarily to increase additional construction cost rapidly, in work progress, anchoring piece, drag-line and
Punching jack may be reused.
One embodiment according to a first aspect of the present invention, shear connector does not include screw rod, nut and low to the resistance to plucking
Mould wrap member is played, described screw rod one end is connected with the nut, and the low-elasticity-modulus wrap member is wrapped on the screw rod.
Further embodiment according to a first aspect of the present invention, the radial thickness of the low-elasticity-modulus wrap member is according to calculating
The slippage arrived determines that the diameter of the nut is that can prevent the hogging moment area concrete roof and the hogging moment
It separation between area's girder steel and starts.
Further embodiment according to a first aspect of the present invention, the low-elasticity-modulus wrap member use foam, sponge or cloth
Manufactured wrap member.
One embodiment according to a first aspect of the present invention, the anchoring piece include end plate, are arranged under the end plate
Peg or reinforcing bar on surface, and the connection otic placode being arranged on the upper surface of the end plate, when the anchoring piece is anchored at institute
When stating hogging moment area concrete roof, the peg is located in the hogging moment area concrete roof, and the connection otic placode is located at
The top of the hogging moment area concrete roof, the connection otic placode with one end of the drag-line for connecting.
Further embodiment according to a first aspect of the present invention, the connection otic placode are equipped with mounting hole, and the mounting hole is used
It is connect in one end of the drag-line.
Further embodiment according to a first aspect of the present invention, the peg or the reinforcement welding on the end plate,
The quantity and specification of the peg or the reinforcing bar are determined according to the design pulling force of the drag-line.
Second aspect of the present invention provides a kind of continuous composite beam bridge hogging moment area crack resistence construction method.
The continuous composite beam bridge hogging moment area crack resistence construction method of embodiment according to a second aspect of the present invention, including it is as follows
Step:
S1: the multiple resistance to pluckings of top layout of the girder steel not shear connector in continuous composite beam bridge hogging moment area；
S2: hogging moment area is not poured at the top of the hogging moment area girder steel of shear connector being disposed with the resistance to plucking
While concrete roof, anchoring piece is respectively correspondingly set at the length direction both ends of the hogging moment area concrete roof,
For the lower anchor of the anchoring piece in the hogging moment area concrete roof, the top of the anchoring piece is located at the hogging moment
The top of area's concrete roof；One end of drag-line is connect with the top of the anchoring piece；
S3: after hogging moment area concrete roof molding, in the length direction of the hogging moment area concrete roof
Punching jack is set between the anchoring piece at both ends, one in the length direction both ends of the hogging moment area concrete roof
The other end of the drag-line on the anchoring piece at end is connect with one end of the punching jack, the hogging moment area coagulation
The other end of the drag-line on the anchoring piece of the other end in the length direction both ends of native top plate and the punching are very heavy
The other end on top connects；
S4: pulling force is applied by drag-line described in the punching jack pair, the hogging moment area concrete roof is made to be pressurized
Axial deformation occurs；
S5: the pulling force for keeping drag-line described in the punching jack pair to apply pours its other than the hogging moment region
The concrete slab in its region；
S6: after the molding of the concrete slab in other regions, the application of drag-line described in the punching jack pair is discharged
Pulling force removes the punching jack and the anchoring piece.
One embodiment according to a second aspect of the present invention, the hogging moment area concrete roof is mixed with swelling agent, to mend
Repay the contraction of hogging moment area concrete roof.
Continuous composite beam bridge hogging moment area crack resistence construction method according to a second aspect of the present invention, may be implemented hogging moment
The importing of area's concrete slab axial stress, floorings when at bridge for hogging moment area provide certain compression deposit, and should
Pressuring stress level can be by Construction control, to effectively cancel out the contraction of hogging moment area concrete roof, temperature change and shifting
The tensile stress generated under dynamic load, in addition to this, what it is due to hogging moment area arrangement is resistance to plucking not shear connector, and hogging moment area is mixed
Compound action between solidifying soil top plate and hogging moment area girder steel is fully released, and hogging moment area concrete roof will not be with negative
The deformation of moment of flexure area girder steel and deform, therefore under traveling load hogging moment area concrete roof tensile stress level very little, can be with
So that continuous composite beam bridge floorings under action of long-term load are constantly in pressured state, to prevent hogging moment floorings
The generation of problem of Cracking, the durability of great enhancing structure.In addition, the technology increases construction material dosage, In without additional
Used anchoring piece, drag-line and punching jack may be reused when construction, reduce construction cost, construction is simple and
Rapidly.
Third aspect present invention also provides a kind of beam bridge.
The beam bridge of embodiment according to a third aspect of the present invention, the beam bridge using according to a second aspect of the present invention any one
The construction method of the continuous composite beam bridge hogging moment area crack resistence of embodiment obtains.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of the typical continuous composite beam bridge of the prior art.
Fig. 2 is internal force diagram of the continuous composite beam bridge shown in FIG. 1 under typical condition.
The signal of one of the step of Fig. 3 is the continuous composite beam bridge hogging moment area crack resistence construction method of second aspect of the present invention
Figure.
Two signals of the step of Fig. 4 is the continuous composite beam bridge hogging moment area crack resistence construction method of second aspect of the present invention
Figure.
Three signals of the step of Fig. 5 is the continuous composite beam bridge hogging moment area crack resistence construction method of second aspect of the present invention
Figure.
Four signals of the step of Fig. 6 is the continuous composite beam bridge hogging moment area crack resistence construction method of second aspect of the present invention
Figure.
Five signals of the step of Fig. 7 is the continuous composite beam bridge hogging moment area crack resistence construction method of second aspect of the present invention
Figure.
Six signals of the step of Fig. 8 is the continuous composite beam bridge hogging moment area crack resistence construction method of second aspect of the present invention
Figure.
Fig. 9 is the resistance to plucking not shearing resistance in the continuous composite beam bridge hogging moment area crack resistence construction equipment of first aspect present invention
Connecting-piece structure schematic diagram.
Figure 10 is the anchoring piece knot in the continuous composite beam bridge hogging moment area crack resistence construction equipment of first aspect present invention
Structure schematic diagram.
Appended drawing reference:
Resistance to plucking not 1 screw rod of shear connector, 11 nut, 12 low-elasticity-modulus wrap member 13
22 connection otic placode of anchoring piece 2 end plate, 21 peg, 23 mounting hole 231
Drag-line 3
Punching jack 4
Hogging moment area girder steel 5
Hogging moment area concrete roof 6
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
The continuous composite beam bridge hogging moment area crack resistence of embodiment according to a first aspect of the present invention is described below with reference to Fig. 7
Equipment.
As shown in fig. 7, the continuous composite beam bridge hogging moment area crack resistence construction of embodiment is set according to a first aspect of the present invention
It is standby, including resistance to plucking not shear connector 1, anchoring piece 2, drag-line 3 and punching jack 4.Wherein, resistance to plucking not use by shear connector 1
In the top for being arranged in continuous composite beam bridge hogging moment area girder steel 5；When in the hogging moment for being disposed with resistance to plucking not shear connector 1
When the top of area's girder steel 5 pours hogging moment area concrete roof 6, the length direction both ends of concrete roof 6 point in hogging moment area
It is not arranged in correspondence with anchoring piece 2, the lower part of anchoring piece 2 is for being anchored in hogging moment area concrete roof 6；Anchoring piece 2 it is upper
Portion is connect with one end of drag-line 3；When hogging moment area concrete roof 6 forms, punching jack 4 is arranged in hogging moment area coagulation
Between the anchoring piece 2 at the length direction both ends of native top plate 6, wherein in the length direction both ends of hogging moment area concrete roof 6
The other end of drag-line 3 on the anchoring piece 2 of one end is connect with one end of punching jack 4, the length of hogging moment area concrete roof 6
The other end of drag-line 3 on the anchoring piece 2 of the other end in degree direction both ends is connect with the other end of punching jack 4, punching
Jack 4 is used to apply pulling force for drag-line 3, so that hogging moment area concrete roof 6 is pressurized and axial deformation occurs.
Specifically, shear connector 1 is not used to be arranged in the top of continuous composite beam bridge hogging moment area girder steel 5 resistance to plucking.
It is understood that shear connector 1 does not have certain amount to the resistance to plucking of the top layout of hogging moment area girder steel 5, can discharge negative
Constraint between moment of flexure area girder steel 5 and hogging moment area concrete roof 6, the hogging moment area concrete roof under acting on hogging moment
6 will not generate tensile stress with the deformation of hogging moment area girder steel 5, and can be with hogging moment area concrete during lifting construction
The importing degree of the compression of top plate 6, hogging moment area concrete roof 6 can be pre-applied to by being conducive to whole compression
On.
When pouring hogging moment area concrete at the top for being disposed with the resistance to plucking not hogging moment area girder steel 5 of shear connector 1
When top plate 6, in hogging moment area, the length direction both ends of concrete roof 6 are respectively correspondingly arranged anchoring piece 2, under anchoring piece 2
Portion is for being anchored in hogging moment area concrete roof 6.It is understood that by being poured in hogging moment area concrete roof 6
While, in hogging moment area, anchoring piece 2, the anchoring of one side anchoring piece 2 is respectively set in the length direction both ends of concrete roof 6
Setting is convenient, on the other hand, is conducive to anchoring piece 2 for the pulling force of drag-line and passes to hogging moment area concrete roof 6, to hogging moment
Area's concrete roof 6 forms a Structure Under Axial Compression.
The top of anchoring piece 2 is connect with one end of drag-line 3.It is understood that can be passed to anchoring piece 2 by drag-line 3
Pass pulling force.
When hogging moment area concrete roof 6 forms, the length of hogging moment area concrete roof 6 is arranged in punching jack 4
It spends between direction both ends anchoring piece 2, wherein the anchoring piece 2 of one end in the length direction both ends of hogging moment area concrete roof 6
On the other end of drag-line 3 connect with one end of punching jack 4, in the length direction both ends of hogging moment area concrete roof 6
The other end anchoring piece 2 on the other end of drag-line 3 connect with the other end of punching jack 4, punching jack 4 for pair
Apply pulling force in drag-line 3, so that hogging moment area concrete roof 6 is pressurized and axial deformation occurs.It is to be appreciated that in punching jack
When 4 load, drag-line 3 can be tightened, and apply pulling force to drag-line 3, pulling force is passed to anchoring piece 2 by drag-line 3, and anchoring piece 2 passes pulling force
Hogging moment area concrete roof 6 is passed, a Structure Under Axial Compression is formed to hogging moment area concrete roof 6, at this time due to hogging moment
Area's concrete roof 6 is that shear connector 1 is not connected by resistance to plucking with hogging moment area girder steel 5, and hogging moment area girder steel 5 will not be about
Beam hogging moment lacks the deformation of concrete roof 6, therefore hogging moment area concrete roof 6 can occur significantly under the action of axle power
Axial deformation.By the size of change 4 pulling force of punching jack, the axle power of hogging moment area concrete roof 6 can be directly controlled,
And then the axial deformation of hogging moment area concrete roof 6 is controlled, the deflection and the axial pressure of later period hogging moment area concrete roof 6
Stress level is directly related, if axial deformation is big, the compression deposit of hogging moment area concrete roof 6 is just higher.
The continuous composite beam bridge hogging moment area crack resistence construction equipment of embodiment according to a first aspect of the present invention, in use,
First by a certain number of resistance to pluckings, shear connector 1 is not arranged in the top of hogging moment area girder steel 5, then in hogging moment area girder steel 5
Cast on top hogging moment area concrete roof 6, while pouring hogging moment area concrete roof 6, in hogging moment area coagulation
The length direction both ends of native top plate 6 anchoring piece 2 with drag-line 3 respectively after the molding of hogging moment area concrete roof 6, then will be born
The other end of drag-line 3 on the anchoring piece 2 at the length direction both ends of moment of flexure area concrete roof 6 is respectively correspondingly very heavy with punching
The both ends connection on top 4, loads punching jack 4, applies pulling force to drag-line 3, and pulling force is passed to anchoring piece 2 by drag-line 3, is anchored
Pulling force is passed into hogging moment area concrete roof 6, to hogging moment area concrete roof 6 formed a Structure Under Axial Compression, at this time by
It with hogging moment area girder steel 5 is that shear connector 1 is not connected by resistance to plucking in hogging moment area concrete roof 6, hogging moment area steel
Beam 5 will not constrain the deformation of hogging moment area concrete roof 6, therefore hogging moment area concrete roof 6 can be under the action of axle power
Apparent axial deformation occurs.By changing the size of 4 pulling force of punching jack, hogging moment area concrete top can be directly controlled
The axle power of plate 6, and then control the axial deformation of hogging moment area concrete roof 6, the deflection and later period hogging moment area concrete
6 axial compression stress of top plate is horizontal directly related, if axial deformation is big, the compression deposit of hogging moment area concrete roof 6 is just
It is higher.
The continuous composite beam bridge hogging moment area crack resistence construction equipment of first aspect present invention embodiment as a result, Ke Yiwei
Hogging moment area concrete roof 6 imports sufficient compression, uses so as to offset hogging moment area concrete roof 6 in bridge
Issuable tensile stress in the process guarantees that floorings are under action of long-term load in the case where no configuration presstressed reinforcing steel
It is in pressured state, prevents the cracking of hogging moment area concrete roof 6, really promotes the endurance quality of bridge structure.Moreover,
The construction equipment is low in cost, constructs more simple and rapid, without increasing additional construction cost, anchoring piece in work progress
2, drag-line 3 and punching jack 4 may be reused.
As shown in figure 9, one embodiment according to a first aspect of the present invention, resistance to plucking not shear connector 1 include screw rod 11,
Nut 12 and low-elasticity-modulus wrap member 13,11 one end of screw rod are connected with nut 12, and low-elasticity-modulus wrap member 13 is wrapped on screw rod 11.By
This, is conducive to discharge the constraint between hogging moment area girder steel 5 and hogging moment area concrete roof 6, negative under acting on hogging moment
Moment of flexure area concrete roof 6 will not generate tensile stress with the deformation of hogging moment area girder steel 5, and can be with lifting construction process
The importing degree of the compression of middle hogging moment area concrete roof 6, be conducive to whole compression can be pre-applied to bear it is curved
On square area concrete roof 6.
Optionally, low-elasticity-modulus wrap member 13 can be using wrap member made of foam, sponge or cloth.
Further embodiment according to a first aspect of the present invention, the radial thickness of low-elasticity-modulus wrap member 13 is according to being calculated
Hogging moment area concrete roof 6 slippage determine, it is to be understood that slippage here refers to hogging moment area coagulation
The deflection of native 6 axial deformation of top plate.Thus, it is possible to which relatively accurately shear connector 1 does not reach expected cunning to control resistance to plucking
Shifting ability.The diameter of nut 12 is the separation that can be prevented between hogging moment area concrete roof 6 and hogging moment area girder steel 5
With start.That is, the diameter needs of nut 12 are sufficiently large to avoid hogging moment area concrete roof 6 and hogging moment area girder steel
It separation between 5 and starts, promotes the endurance quality of bridge structure.
As shown in Figure 10, one embodiment according to a first aspect of the present invention, anchoring piece 2 include end plate 21, are arranged and are holding
Peg 22 or reinforcing bar on the lower surface of plate 21, and the connection otic placode 23 being arranged on the upper surface of end plate 21, when 2 anchor of anchoring piece
Gu in hogging moment area when concrete roof 6, peg 22 is located in hogging moment area concrete roof 6, connection otic placode 23 is curved positioned at bearing
The top of square area concrete roof 6, connection otic placode 23 with one end of drag-line 3 for connecting.It is understood that peg 22 is located at
In hogging moment area concrete roof 6, pulling force can be passed to by hogging moment area concrete roof 6 by peg 22, to hogging moment
Area's concrete roof 6 forms a Structure Under Axial Compression.Connection otic placode 23 is located at the top of hogging moment area concrete roof 6, engaging lug
Plate 23 for connecting with one end of drag-line 3, install simple and convenient by drag-line 3.
As shown in Figure 10, further embodiment, connection otic placode 23 can be equipped with mounting hole according to a first aspect of the present invention
231, it can be connect, be installed simple and convenient with one end of drag-line 3 by the mounting hole 231.
Further embodiment according to a first aspect of the present invention, peg 22 or reinforcement welding on end plate 21, peg 22 or
The quantity and specification of reinforcing bar are determined according to the design pulling force of drag-line 3, can save the material of peg 22 or reinforcing bar, convenient for construction.
Second aspect of the present invention provides a kind of continuous composite beam bridge hogging moment area crack resistence construction method.
Cracking construction in continuous composite beam bridge hogging moment area according to an embodiment of the present invention is described below with reference to Fig. 3 to Fig. 8
Method.
Continuous composite beam bridge hogging moment area crack resistence construction method according to a second aspect of the present invention, includes the following steps:
S1: as shown in figure 3, in the multiple resistance to pluckings of the top layout not shear connections of continuous composite beam bridge hogging moment area girder steel 5
Part 1 can discharge the compound action of hogging moment area girder steel 5 Yu hogging moment area concrete roof 6, so that will not occur between the two
Cooperative transformation, to make the deformation of hogging moment area concrete roof 6 will not be by the constraint of hogging moment area girder steel 5.
S2: as shown in figure 4, the top for being disposed with the resistance to plucking not hogging moment area girder steel 5 of shear connector 1 pour bear it is curved
While square area concrete roof 6, in hogging moment area, anchoring piece is respectively correspondingly arranged in the length direction both ends of concrete roof 6
2, for the lower anchor of anchoring piece 2 in hogging moment area concrete roof 6, the top of anchoring piece 2 is located at hogging moment area concrete top
The top of plate 6；One end of drag-line 3 is connect with the top of anchoring piece 2, for importing compression.
S3: as shown in figure 5, after the molding of hogging moment area concrete roof 6, the length of concrete roof 6 in hogging moment area
Punching jack 4 is set between the anchoring piece 2 at direction both ends, one in the length direction both ends of hogging moment area concrete roof 6
The other end of drag-line 3 on the anchoring piece 2 at end is connect with one end of punching jack 4, the length of hogging moment area concrete roof 6
The other end of drag-line 3 on the anchoring piece 2 of the other end in the both ends of direction is connect with the other end of punching jack 4, for leading
Enter compression.
S4: as shown in fig. 6, applying pulling force to drag-line 3 by punching jack 4, hogging moment area concrete roof 6 is made to be pressurized
Axial deformation occurs, that is to say, that pulling force is applied by drag-line 3 of the punching jack 4 to two sides, which passes through drag-line 3 one
The anchoring piece 2 at end passes to hogging moment area concrete roof 6, since hogging moment area concrete roof 6 is by resistance to plucking not shearing resistance
Connector 1 is connected with hogging moment area girder steel 5, and the deformation of hogging moment area concrete roof 6 not will receive hogging moment area girder steel 5
Constraint, therefore, whole pulling force that punching jack 4 applies at this time will be imported into completely in hogging moment area concrete roof 6, be born curved
Square area concrete roof 6 is in pressured state, and certain axial deformation occurs.
S5: as shown in fig. 7, the pulling force for keeping punching jack 4 to apply drag-line 3, pours its other than hogging moment region
The concrete slab in its region.It is understood that hogging moment area is mixed when pouring the concrete slab of hogging moment region two side areas
Solidifying soil top plate 6 is still within pressured state.
S6: as shown in figure 8, after the molding of the concrete slab in other regions, release punching jack 4 applies drag-line 3
Pulling force removes punching jack 4 and anchoring piece 2.It is understood that the drawing applied in release punching jack 4 to drag-line 3
Power, the hogging moment area concrete roof 6 in compressive state will occur axial elongation and restore to the original state, but since two sides have been poured
Molding concrete slab is built, the axial elongation of hogging moment area concrete roof 6 suffers restraints, thus after jack revocation still
So in the state being pressurized.
Continuous composite beam bridge hogging moment area crack resistence construction method according to a second aspect of the present invention, may be implemented hogging moment
The importing of area's concrete slab axial stress, floorings when at bridge for hogging moment area provide certain compression deposit, and should
Pressuring stress level can be by Construction control, to effectively cancel out the contraction of hogging moment area concrete roof 6, temperature change and shifting
The tensile stress generated under dynamic load, in addition to this, what it is due to hogging moment area arrangement is resistance to plucking not shear connector 1, hogging moment area
Compound action between concrete roof 6 and hogging moment area girder steel 5 is fully released, and hogging moment area concrete roof 6 will not
Deformed with the deformation of hogging moment area girder steel 5, thus under traveling load hogging moment area concrete roof 6 tensile stress level very
It is small, continuous composite beam bridge floorings under action of long-term load can be made to be constantly in pressured state, thus prevent bear it is curved
The generation of square floorings problem of Cracking, the durability of great enhancing structure.In addition, the technology increases construction material without additional
Dosage, in construction, used anchoring piece 2, drag-line 3 and punching jack 4 may be reused, and reduce construction cost,
Construction is simple and rapidly.
One embodiment according to a second aspect of the present invention, in step s 2, hogging moment area concrete roof 6 is mixed with expansion
Agent, to compensate the contraction of hogging moment area concrete roof, that is to say, that suitable by being added in hogging moment area concrete roof 6
When swelling agent so that the concrete contraction percentage of hogging moment area concrete roof 6 reduces, to reach compensation hogging moment area coagulation
The contraction of native top plate 6 advantageously allows continuous composite beam bridge floorings under action of long-term load and is constantly in pressured state.
Further embodiment according to a second aspect of the present invention pours other other than hogging moment region in step s 5
When the concrete slab in region, swelling agent appropriate can also be added, in concrete slab with the contraction of compensating concrete plate.
Third aspect present invention also provides a kind of beam bridge.
Beam bridge according to a third aspect of the present invention, beam bridge use continuous group of any one embodiment of second aspect of the present invention
The construction method for closing beam bridge hogging moment area crack resistence obtains.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are included at least one embodiment or example of the invention.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of continuous composite beam bridge hogging moment area crack resistence construction equipment characterized by comprising
Resistance to plucking not shear connector, the resistance to plucking not shear connector for being arranged in continuous composite beam bridge hogging moment area girder steel
Top；
Anchoring piece, when not pouring hogging moment at the top of the hogging moment area girder steel of shear connector being disposed with the resistance to plucking
When area's concrete roof, the anchoring is respectively correspondingly set at the length direction both ends of the hogging moment area concrete roof
Part, the lower part of the anchoring piece is for being anchored in the hogging moment area concrete roof；
Drag-line, the top of the anchoring piece are connect with one end of the drag-line；
Punching jack, when hogging moment area concrete roof molding, the punching jack is arranged in the hogging moment
Between the anchoring piece at the length direction both ends of area's concrete roof, wherein the length of the hogging moment area concrete roof
The other end of the drag-line on the anchoring piece of one end in the both ends of direction is connect with one end of the punching jack, institute
State the other end of the drag-line on the anchoring piece of the other end in the length direction both ends of hogging moment area concrete roof
It is connect with the other end of the punching jack, the punching jack is used to apply pulling force for the drag-line, makes described negative
Moment of flexure area concrete roof, which is pressurized, occurs axial deformation.
2. continuous composite beam bridge hogging moment area crack resistence construction equipment according to claim 1, which is characterized in that described anti-
Pulling out not shear connector includes screw rod, nut and low-elasticity-modulus wrap member, and described screw rod one end is connected with the nut, the low bullet
Mould wrap member is wrapped on the screw rod.
3. continuous composite beam bridge hogging moment area crack resistence construction equipment according to claim 2, which is characterized in that described low
The radial thickness for playing mould wrap member determines that the diameter of the nut is described for that can prevent according to the slippage being calculated
It separation between hogging moment area concrete roof and the hogging moment area girder steel and starts.
4. continuous composite beam bridge hogging moment area crack resistence construction equipment according to claim 2, which is characterized in that described low
Mould wrap member is played using wrap member made of foam, sponge or cloth.
5. continuous composite beam bridge hogging moment area crack resistence construction equipment according to claim 1, which is characterized in that the anchor
Firmware includes end plate, peg or reinforcing bar on the lower surface that the end plate is arranged in, and is arranged on the upper surface of the end plate
Connection otic placode, when the anchoring piece is anchored at the hogging moment area concrete roof, the peg is located at the hogging moment
In area's concrete roof, the connection otic placode is located at the top of the hogging moment area concrete roof, and the connection otic placode is used for
It is connect with one end of the drag-line.
6. continuous composite beam bridge hogging moment area crack resistence construction equipment according to claim 5, which is characterized in that the company
Ear connecting plate is equipped with mounting hole, and the mounting hole with one end of the drag-line for connecting.
7. continuous composite beam bridge hogging moment area crack resistence construction equipment according to claim 5, which is characterized in that the bolt
Nail or the reinforcement welding are on the end plate, and the quantity and specification of the peg or the reinforcing bar are according to the design of the drag-line
Pulling force determines.
8. a kind of continuous composite beam bridge hogging moment area crack resistence construction method, which comprises the steps of:
S1: the multiple resistance to pluckings of top layout of the girder steel not shear connector in continuous composite beam bridge hogging moment area；
S2: hogging moment area coagulation is not poured at the top of the hogging moment area girder steel of shear connector being disposed with the resistance to plucking
While native top plate, anchoring piece is respectively correspondingly set at the length direction both ends of the hogging moment area concrete roof, it is described
For the lower anchor of anchoring piece in the hogging moment area concrete roof, it is mixed that the top of the anchoring piece is located at the hogging moment area
The top of solidifying soil top plate；One end of drag-line is connect with the top of the anchoring piece；
S3: after hogging moment area concrete roof molding, at the length direction both ends of the hogging moment area concrete roof
The anchoring piece between punching jack is set, one end in the length direction both ends of the hogging moment area concrete roof
The other end of the drag-line on the anchoring piece is connect with one end of the punching jack, hogging moment area concrete top
The other end of the drag-line on the anchoring piece of the other end in the length direction both ends of plate and the punching jack
Other end connection；
S4: applying pulling force by drag-line described in the punching jack pair, so that the hogging moment area concrete roof is pressurized and occurs
Axial deformation；
S5: the pulling force for keeping drag-line described in the punching jack pair to apply pours other areas other than the hogging moment region
The concrete slab in domain；
S6: after the molding of the concrete slab in other regions, discharging the pulling force of the application of drag-line described in the punching jack pair,
Remove the punching jack and the anchoring piece.
9. continuous composite beam bridge hogging moment area crack resistence construction method according to claim 8, which is characterized in that described negative
Moment of flexure area concrete roof is mixed with swelling agent, to compensate the contraction of hogging moment area concrete roof.
10. a kind of beam bridge, which is characterized in that the beam bridge is born curved using continuous composite beam bridge according to claim 8 or claim 9
The construction method of square area crack resistence obtains.
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| CN201910640837.5A CN110409305B (en) | 2019-07-16 | 2019-07-16 | Anti-cracking construction equipment and construction method for hogging moment area of continuous composite beam bridge and beam bridge |
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