CN210797280U - Anti-cracking construction equipment for hogging moment area of continuous composite beam bridge - Google Patents
Anti-cracking construction equipment for hogging moment area of continuous composite beam bridge Download PDFInfo
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- CN210797280U CN210797280U CN201921118895.3U CN201921118895U CN210797280U CN 210797280 U CN210797280 U CN 210797280U CN 201921118895 U CN201921118895 U CN 201921118895U CN 210797280 U CN210797280 U CN 210797280U
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- 238000010276 construction Methods 0.000 title claims abstract description 57
- 239000002131 composite material Substances 0.000 title claims description 34
- 238000005336 cracking Methods 0.000 title claims description 32
- 238000004873 anchoring Methods 0.000 claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 238000010008 shearing Methods 0.000 claims abstract description 20
- 230000000149 penetrating effect Effects 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
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- 230000008569 process Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
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- 239000004035 construction material Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a continuous combination beam bridge hogging moment district prevents construction equipment that ftractures, including resistance to plucking connector, anchor assembly, cable and the jack that pierces through not shearing. The anti-pulling and non-shearing connecting piece is arranged at the top of the steel beam in the hogging moment area; when the hogging moment area concrete roof is poured at the top of the hogging moment area steel beam, anchoring parts with guys are arranged at two ends of the hogging moment area concrete roof in the length direction, and a center-penetrating jack is arranged between the anchoring parts at two ends of the hogging moment area concrete roof in the length direction.
Description
Technical Field
The utility model relates to a beam bridge structural engineering technical field especially relates to a continuous combination beam bridge hogging moment district prevents construction equipment that ftractures.
Background
As shown in fig. 1, a typical three-span continuous composite beam bridge is composed of a concrete slab 300 and a steel beam 200, which are connected to form a whole through a shear connector 400, the shear connector 400 can transmit the shear force between the steel beam 200 and the concrete slab 300 interface, so as to ensure the two to cooperatively deform, thereby forming a combination which can make the concrete slab 300 under compression and the steel beam 200 under tension when acting in positive bending moment, thus fully exerting the mechanical properties of the two materials and improving the structural rigidity and bearing capacity.
However, as shown in fig. 2, which is an internal force diagram of the continuous bridge shown in fig. 1 under typical working conditions, it can be seen that although the midspan is under positive bending moment action, which is beneficial for exerting the advantages of the composite structure, the composite beam bridge is under significant negative bending moment action near the support 100, at which time the concrete slab 300 is under tension, the steel beam 200 is under compression, and the concrete slab 300 is likely to crack due to excessive tensile stress, which affects the durability of the structure.
At present, two main ways are available for solving the problem of cracking of the hogging moment area of the continuous composite beam bridge, one way is to apply prestress on the concrete slab in the hogging moment area, and offset the tensile stress generated during the operation of the beam bridge by introducing a certain compressive stress, but because the concrete slab in the hogging moment area forms a combined action with the steel beam through a shear connector, the deformation of the concrete slab under the prestress is restricted by the steel beam, the introduction degree of the prestress is very low, a large part of the prestress is borne by the steel beam, so that a large number of prestress bundles are required to meet the design requirement, the construction cost is increased, and the construction period is prolonged. Another method for solving the problem of cracking in the hogging moment area is to arrange a certain number of anti-pulling and non-shearing connecting pieces on the upper edge of the steel beam in the hogging moment area, and the connecting pieces can release the restraint between the steel beam and the concrete slab, so that the concrete slab under the action of the hogging moment cannot generate tensile stress along with the deformation of the steel beam, and when prestress is applied, all the prestress can be applied to the concrete slab.
Although the prestress can prevent the hogging moment concrete slab from cracking, the construction cost is increased, the construction period is longer, and the prestress process is more complex; the placement of the uplift and shear resistant connectors can relieve the combined effect of the hogging moment concrete slab and steel beam, but does not provide additional compressive stress to counteract the tensile stress of the slab under shrinkage and temperature loading, and the hogging moment concrete slab can still crack. Therefore, a crack prevention technology with lower cost, simpler construction and quicker construction is urgently needed to prevent the cracking of the hogging moment concrete slab and improve the durability of the structure.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a continuous combination beam bridge hogging moment district prevents construction equipment that ftractures not only can prevent the fracture of hogging moment district concrete roof for the leading-in sufficient compressive stress of hogging moment district concrete roof, moreover, this construction equipment low cost, the construction is more simple and rapid, need not to increase extra construction cost in the work progress, construction equipment can used repeatedly.
According to the utility model discloses continuous combination beam bridge hogging moment district anti-cracking construction equipment of embodiment of the first aspect, include:
the anti-pulling and anti-shearing connecting piece is used for being arranged at the top of the steel beam in the hogging moment area of the continuous composite beam bridge;
when a hogging moment area concrete top plate is poured on the top of the hogging moment area steel beam with the uplift-resistant non-shear connector, the anchoring parts are correspondingly arranged at two ends of the hogging moment area concrete top plate in the length direction respectively, and the lower part of each anchoring part is used for anchoring in the hogging moment area concrete top plate;
the upper part of the anchoring part is connected with one end of the inhaul cable;
the center penetrating jack is arranged between the anchoring parts at the two ends of the hogging moment area concrete top plate in the length direction, wherein the other end of the stay cable on the anchoring part at one end of the two ends of the hogging moment area concrete top plate in the length direction is connected with one end of the center penetrating jack, the other end of the stay cable on the anchoring part at the other end of the hogging moment area concrete top plate in the two ends of the hogging moment area concrete top plate in the length direction is connected with the other end of the center penetrating jack, and the center penetrating jack is used for exerting pulling force on the stay cable to enable the hogging moment area concrete top plate to be pressed to generate axial deformation.
According to the anti-cracking construction equipment for hogging moment area of continuous composite beam bridge of the embodiment of the first aspect of the utility model, when in use, a certain amount of anti-pulling non-shearing connectors are arranged on the top of the hogging moment area steel beam, then the hogging moment area concrete roof is cast on the top of the hogging moment area steel beam, when the hogging moment area concrete roof is cast, the anchoring parts with the guy cables are respectively arranged at the two ends of the length direction of the hogging moment area concrete roof, after the hogging moment area concrete roof is formed, the other ends of the guy cables on the anchoring parts at the two ends of the length direction of the hogging moment area concrete roof are respectively and correspondingly connected with the two ends of the through jack, the through jack is loaded, the guy cables apply tensile force to the guy cables, the guy cables transmit the tensile force to the anchoring parts, the anchoring parts transmit the tensile force to the, at the moment, the hogging moment area concrete top plate and the hogging moment area steel beam are connected through the uplift-resistant non-shearing-resistant connecting piece, and the hogging moment area steel beam cannot restrict the deformation of the hogging moment area concrete top plate, so that the hogging moment area concrete top plate can generate obvious axial deformation under the action of axial force. Through changing the tensile size of punch jack, can direct control hogging moment district concrete roof's axial force, and then the axial deformation of control hogging moment district concrete roof, this deflection is directly relevant with later stage hogging moment district concrete roof axial compressive stress level, and if axial deformation is big, the compressive stress reserve of hogging moment district concrete roof is just higher.
The utility model discloses the continuous combination beam bridge hogging moment district anti-cracking construction equipment of the embodiment of the first aspect can be for the leading-in sufficient compressive stress of hogging moment district concrete roof to can offset the tensile stress that hogging moment district concrete roof probably produced in the bridge use, guarantee under the condition that does not dispose prestressing tendons, the decking all is in the pressurized state under long-term load effect, prevent the fracture of hogging moment district concrete roof, really promote the durability of bridge construction. Moreover, the construction equipment is low in cost, the construction is simpler and quicker, extra construction cost is not required to be added in the construction process, and the anchoring piece, the inhaul cable and the penetrating jack can be repeatedly used.
According to the utility model discloses an embodiment of first aspect, resistance to plucking is shear connector not includes screw rod, nut and low elasticity mould parcel piece, screw rod one end with the nut links to each other, low elasticity mould parcel piece parcel is in on the screw rod.
According to the utility model discloses the further embodiment of first aspect, the radial thickness of low elasticity mould parcel piece is confirmed according to the slippage that the calculation obtained, the diameter size of nut is for can preventing hogging moment district concrete roof with separation and lift between the hogging moment district girder steel.
According to a further embodiment of the first aspect of the present invention, the low-resilience mold covering is a covering made of foam, sponge or cloth.
According to the utility model discloses an embodiment of first aspect, anchor assembly includes the end plate, sets up peg or reinforcing bar on the lower surface of end plate, and sets up connect the otic placode on the upper surface of end plate, work as anchor assembly anchors when negative moment district concrete roof, the peg is located in negative moment district concrete roof, connect the otic placode to be located negative moment district concrete roof's top, connect the otic placode be used for with the one end of cable is connected.
According to the utility model discloses the further embodiment of first aspect, it is equipped with the mounting hole to connect the otic placode, the mounting hole be used for with the one end of cable is connected.
According to a further embodiment of the first aspect of the present invention, the stud or the steel bar is welded to the end plate, and the number and specification of the stud or the steel bar are determined according to the design tension of the cable.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a continuous composite girder bridge typical of the prior art.
Fig. 2 is an internal force diagram of the continuous composite girder bridge shown in fig. 1 under a typical working condition.
Fig. 3 is a schematic view of the second aspect of the present invention illustrating the anti-crack construction method in hogging moment region of continuous composite girder bridge.
Fig. 4 is a schematic view of the second step of the anti-cracking construction method for hogging moment area of continuous composite girder bridge according to the second aspect of the present invention.
Fig. 5 is a third schematic view of the anti-cracking construction method for hogging moment area of continuous composite beam bridge according to the second aspect of the present invention.
Fig. 6 is a fourth schematic view of the steps of the anti-cracking construction method for hogging moment area of continuous composite beam bridge according to the second aspect of the present invention.
Fig. 7 is a fifth schematic view of the steps of the anti-cracking construction method for hogging moment area of continuous composite beam bridge according to the second aspect of the present invention.
Fig. 8 is a sixth schematic view of the steps of the anti-cracking construction method for hogging moment area of continuous composite beam bridge according to the second aspect of the present invention.
Fig. 9 is a schematic structural view of the anti-pulling and non-shearing connector in the anti-cracking construction equipment for the hogging moment region of the continuous composite girder bridge according to the first aspect of the present invention.
Fig. 10 is a schematic structural view of the anchoring member in the anti-cracking construction equipment for hogging moment area of the continuous composite beam bridge according to the first aspect of the present invention.
Reference numerals:
anti-pulling non-shearing connector 1 screw rod 11 screw cap 12 low elastic modulus wrapping piece 13
Stay cable 3
Center-penetrating jack 4
Hogging moment area girder steel 5
Hogging moment area concrete roof 6
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
The anti-cracking device for hogging moment area of continuous composite beam bridge according to the embodiment of the first aspect of the present invention is described below with reference to fig. 7.
As shown in fig. 7, the continuous composite beam bridge hogging moment area anti-cracking construction equipment according to the embodiment of the first aspect of the invention comprises a pulling-resistant non-shearing connector 1, an anchoring part 2, a stay cable 3 and a piercing jack 4. Wherein, the anti-pulling non-shearing connecting piece 1 is used for being arranged at the top of the steel beam 5 in the hogging moment area of the continuous composite beam bridge; when a hogging moment area concrete top plate 6 is poured on the top of a hogging moment area steel beam 5 which is provided with the uplift-resistant non-shear connector 1, two ends of the hogging moment area concrete top plate 6 in the length direction are respectively and correspondingly provided with an anchoring part 2, and the lower part of each anchoring part 2 is used for anchoring in the hogging moment area concrete top plate 6; the upper part of the anchoring part 2 is connected with one end of a guy cable 3; when the hogging moment area concrete roof 6 is molded, the center penetrating jack 4 is arranged between the anchoring parts 2 at the two ends of the hogging moment area concrete roof 6 in the length direction, wherein the other end of the stay cable 3 on the anchoring part 2 at one end of the two ends of the hogging moment area concrete roof 6 in the length direction is connected with one end of the center penetrating jack 4, the other end of the stay cable 3 on the anchoring part 2 at the other end of the two ends of the hogging moment area concrete roof 6 in the length direction is connected with the other end of the center penetrating jack 4, and the center penetrating jack 4 is used for applying tension to the stay cable 3 so that the hogging moment area concrete roof 6 is pressed to generate axial deformation.
Specifically, the uplift non-shear connector 1 is used to be disposed on the top of the steel girder 5 in the hogging moment region of the continuous composite girder bridge. It can be understood that the uplift-resistant non-shearing connectors 1 arranged at the top of the steel beam 5 in the hogging moment area have a certain number, and can release the restraint between the steel beam 5 in the hogging moment area and the concrete roof 6 in the hogging moment area, so that the concrete roof 6 in the hogging moment area under the action of the hogging moment can not generate tensile stress along with the deformation of the steel beam 5 in the hogging moment area, and the degree of introduction of the compressive stress of the concrete roof 6 in the hogging moment area in the construction process can be improved, thereby being beneficial to exerting all the compressive stress on the concrete roof 6 in the hogging moment.
When the hogging moment area concrete roof 6 is poured on the top of the hogging moment area steel beam 5 which is provided with the uplift-resistant non-shear connector 1, the anchoring parts 2 are correspondingly arranged at two ends of the hogging moment area concrete roof 6 in the length direction respectively, and the lower parts of the anchoring parts 2 are used for anchoring in the hogging moment area concrete roof 6. It can be understood that, when pouring at hogging moment district concrete roof 6, set up anchor assembly 2 respectively at hogging moment district concrete roof 6's length direction both ends, anchor assembly 2's anchor sets up conveniently on the one hand, and on the other hand is favorable to anchor assembly 2 to transmit the pulling force of cable for hogging moment district concrete roof 6, forms an axle load effect to hogging moment district concrete roof 6.
The upper part of the anchoring piece 2 is connected with one end of a guy cable 3. It will be appreciated that tension can be transmitted to the anchor member 2 by the cable 3.
When the hogging moment area concrete roof 6 is molded, the center penetrating jack 4 is arranged between the anchoring parts 2 at two ends in the length direction of the hogging moment area concrete roof 6, wherein the other end of the stay cable 3 on the anchoring part 2 at one end of the two ends in the length direction of the hogging moment area concrete roof 6 is connected with one end of the center penetrating jack 4, the other end of the stay cable 3 on the anchoring part 2 at the other end of the two ends in the length direction of the hogging moment area concrete roof 6 is connected with the other end of the center penetrating jack 4, and the center penetrating jack 4 is used for applying tension to the stay cable 3 so that the hogging moment area concrete roof 6 is pressed to generate axial deformation. It can be understood that, when punching jack 4 loads, cable 3 can be taut, exert pulling force to cable 3, cable 3 transmits pulling force to anchor assembly 2, anchor assembly 2 transmits pulling force to hogging moment district concrete roof 6, form an axle load effect to hogging moment district concrete roof 6, because hogging moment district concrete roof 6 and hogging moment district girder steel 5 are continuous through resistance to plucking non-shear connector 1 this moment, hogging moment district girder steel 5 can not retrain the deformation of hogging moment lack concrete roof 6, therefore hogging moment district concrete roof 6 can take place obvious axial deformation under the effect of axial force. Through changing the tensile size of punch jack 4, can direct control hogging moment district concrete roof 6's axial force, and then control hogging moment district concrete roof 6's axial deformation, this deflection is directly relevant with later stage hogging moment district concrete roof 6 axial compressive stress level, if axial deformation is big, the compressive stress reserve of hogging moment district concrete roof 6 is just higher.
According to the anti-cracking construction equipment for hogging moment area of continuous composite beam bridge of the embodiment of the first aspect of the utility model, when in use, a certain number of anti-pulling non-shearing connectors 1 are arranged on the top of the hogging moment area steel beam 5, then the hogging moment area concrete roof 6 is cast on the top of the hogging moment area steel beam 5, when the hogging moment area concrete roof 6 is cast, the anchoring parts 2 of the guy cables 3 are respectively arranged at the two ends of the hogging moment area concrete roof 6 in the length direction, after the hogging moment area concrete roof 6 is formed, the other ends of the guy cables 3 on the anchoring parts 2 at the two ends of the hogging moment area concrete roof 6 in the length direction are respectively and correspondingly connected with the two ends of the center-through jack 4, the center-through jack 4 is loaded, the pulling force is applied to the guy cables 3, the guy cables 3 transmit the pulling force to, an axial compression effect is formed on the concrete top plate 6 in the hogging moment area, at the moment, the concrete top plate 6 in the hogging moment area and the steel beam 5 in the hogging moment area are connected through the anti-pulling non-shearing connecting piece 1, the steel beam 5 in the hogging moment area cannot restrict the deformation of the concrete top plate 6 in the hogging moment area, and therefore the concrete top plate 6 in the hogging moment area can generate obvious axial deformation under the action of the axial force. Through changing the tensile size of punch jack 4, can direct control hogging moment district concrete roof 6's axial force, and then control hogging moment district concrete roof 6's axial deformation, this deflection is directly relevant with later stage hogging moment district concrete roof 6 axial compressive stress level, if axial deformation is big, the compressive stress reserve of hogging moment district concrete roof 6 is just higher.
From this, the utility model discloses the continuous combination beam bridge hogging moment district anti-cracking construction equipment of the embodiment of the first aspect can be for the leading-in sufficient compressive stress of hogging moment district concrete roof 6 to can offset the tensile stress that hogging moment district concrete roof 6 probably produced in the bridge use, guarantee under the condition that does not dispose prestressing tendons, the decking all is in the pressurized state under long-term load effect, prevent the fracture of hogging moment district concrete roof 6, really promote the durability of bridge construction. Moreover, the construction equipment has low cost, the construction is simpler and quicker, the additional construction cost is not required to be increased in the construction process, and the anchoring piece 2, the inhaul cable 3 and the penetrating jack 4 can be repeatedly used.
As shown in fig. 9, according to an embodiment of the first aspect of the present invention, the anti-pulling and non-shearing connector 1 includes a screw 11, a nut 12 and a low elastic modulus wrapping piece 13, wherein one end of the screw 11 is connected to the nut 12, and the low elastic modulus wrapping piece 13 wraps the screw 11. Therefore, the restraint between the hogging moment area steel beam 5 and the hogging moment area concrete top plate 6 can be released, the hogging moment area concrete top plate 6 under the action of the hogging moment can not generate tensile stress along with the deformation of the hogging moment area steel beam 5, the degree of introduction of the compressive stress of the hogging moment area concrete top plate 6 in the construction process can be improved, and all the compressive stress can be applied to the hogging moment area concrete top plate 6 in advance.
Alternatively, the low-resilience mold wrapper 13 may be a wrapper made of foam, sponge, or cloth.
According to the utility model discloses the further embodiment of first aspect, the radial thickness of low elasticity mould parcel 13 is confirmed according to the slip volume of the hogging moment district concrete roof 6 that the calculation obtained, and it can be understood that the slip volume here refers to the deflection of hogging moment district concrete roof 6 axial deformation. Therefore, the pulling-resistant and shearing-resistant connecting piece 1 can be accurately controlled to reach the expected sliding capacity. The diameter of the nut 12 is sized to prevent separation and lifting between the hogging moment region concrete roof 6 and the hogging moment region steel beam 5. That is, the diameter of the nut 12 needs to be large enough to prevent the separation and lifting between the hogging moment region concrete roof 6 and the hogging moment region steel girder 5, thereby improving the durability of the bridge structure.
As shown in fig. 10, according to an embodiment of the first aspect of the present invention, the anchoring member 2 includes an end plate 21, a stud 22 or a reinforcing bar provided on a lower surface of the end plate 21, and a connecting lug plate 23 provided on an upper surface of the end plate 21, when the anchoring member 2 is anchored to the hogging moment region concrete roof 6, the stud 22 is located in the hogging moment region concrete roof 6, the connecting lug plate 23 is located above the hogging moment region concrete roof 6, and the connecting lug plate 23 is used for being connected to one end of the stay cable 3. It can be understood that the pin 22 is located in the hogging moment region concrete roof 6, and the pulling force can be transmitted to the hogging moment region concrete roof 6 through the pin 22, so that an axial compression effect is formed on the hogging moment region concrete roof 6. The connecting lug plate 23 is positioned above the hogging moment area concrete top plate 6, the connecting lug plate 23 is used for being connected with one end of the inhaul cable 3, and the inhaul cable 3 is simple and convenient to install.
As shown in fig. 10, according to a further embodiment of the first aspect of the present invention, the connecting ear plate 23 may be provided with a mounting hole 231, and the mounting hole 231 may be connected to one end of the cable 3, so that the installation is simple and convenient.
According to the utility model discloses the further embodiment of first aspect, peg 22 or reinforcing bar welding are on end plate 21, and the quantity and the specification of peg 22 or reinforcing bar are confirmed according to the design pulling force of cable 3, can save the material of peg 22 or reinforcing bar, are convenient for construct.
The utility model discloses the second aspect provides a continuous composite beam bridge hogging moment district anti-cracking construction method.
The following describes a continuous composite beam bridge hogging moment area cracking construction method according to an embodiment of the present invention with reference to fig. 3 to 8.
According to the utility model discloses continuous combination beam bridge hogging moment district anti-cracking construction method of second aspect, including following step:
s1: as shown in fig. 3, a plurality of uplift-resistant non-shearing connectors 1 are arranged at the top of the continuous composite beam bridge hogging moment region steel beam 5, so that the combined action of the hogging moment region steel beam 5 and the hogging moment region concrete top plate 6 can be released, and the two cannot generate cooperative deformation, so that the deformation of the hogging moment region concrete top plate 6 cannot be restrained by the hogging moment region steel beam 5.
S2: as shown in fig. 4, when the hogging moment region concrete roof 6 is poured on the top of the hogging moment region steel beam 5 which is arranged with the uplift-resistant non-shear connector 1, the anchoring parts 2 are correspondingly arranged at two ends of the hogging moment region concrete roof 6 in the length direction respectively, the lower parts of the anchoring parts 2 are anchored in the hogging moment region concrete roof 6, and the upper parts of the anchoring parts 2 are positioned above the hogging moment region concrete roof 6; one end of the stay cable 3 is connected to the upper portion of the anchor member 2 for introducing a compressive stress.
S3: as shown in fig. 5, after the hogging moment area concrete roof 6 is molded, a center-penetrating jack 4 is arranged between the anchoring parts 2 at the two ends in the length direction of the hogging moment area concrete roof 6, the other end of the stay cable 3 on the anchoring part 2 at one end of the two ends in the length direction of the hogging moment area concrete roof 6 is connected with one end of the center-penetrating jack 4, and the other end of the stay cable 3 on the anchoring part 2 at the other end of the two ends in the length direction of the hogging moment area concrete roof 6 is connected with the other end of the center-penetrating jack 4 for introducing compressive stress.
S4: as shown in fig. 6, the pulling force is applied to the pulling cable 3 by the penetrating jack 4, so that the concrete roof panel 6 in the negative moment region is compressed to generate axial deformation, that is, the pulling force is applied to the pulling cables 3 at two sides by the penetrating jack 4, the pulling force is transmitted to the concrete roof panel 6 in the negative moment region by the anchoring part 2 at one end of the pulling cable 3, because the concrete roof panel 6 in the negative moment region is connected with the steel girder 5 in the negative moment region by the uplift non-shearing resistant connecting part 1, the deformation of the concrete roof panel 6 in the negative moment region is not restrained by the steel girder 5 in the negative moment region, therefore, at this time, all the pulling force applied by the penetrating jack 4 is completely introduced into the concrete roof panel 6 in the negative moment region, and the concrete roof panel 6 in the negative moment region is in a compressed state and generates certain.
S5: as shown in fig. 7, the concrete slab in the area other than the negative moment area is cast while maintaining the pulling force applied to the cable 3 by the center-penetrating jack 4. It will be appreciated that the hogging moment region concrete roof 6 is still under compression when the concrete panels in the zones either side of the hogging moment region are being poured.
S6: after the concrete slab in other areas is formed, the pulling force applied to the cable 3 by the penetrating jack 4 is released, and the penetrating jack 4 and the anchoring piece 2 are removed, as shown in fig. 8. It can be understood that when the pulling force applied to the cable 3 by the penetrating jack 4 is released, the concrete roof 6 in the hogging moment area in the compressed state is subjected to axial elongation and then is restored to the original state, but because the formed concrete slabs are poured on two sides, the concrete roof 6 in the hogging moment area is restrained from axial elongation, so that the concrete roof is still in a compressed state after the jack is removed.
According to the anti-cracking construction method for hogging moment area of continuous composite beam bridge of the second aspect of the utility model, the axial stress of the concrete slab in the hogging moment area can be guided in, a certain pressure stress reserve is provided for the bridge deck in the hogging moment area when the bridge is formed, and the pressure stress level can be controlled through construction, thereby effectively offsetting the tensile stress generated under the shrinkage, temperature change and moving load of the concrete roof 6 in the hogging moment area, besides, because the anti-pulling non-shearing connecting piece 1 is arranged in the hogging moment area, the combination action between the concrete roof 6 in the hogging moment area and the steel beam 5 in the hogging moment area is completely released, the concrete roof 6 in the hogging moment area can not deform along with the deformation of the steel beam 5 in the hogging moment area, therefore, the tensile stress level of the concrete roof 6 in the hogging moment area under the moving load is very small, the bridge deck can, thereby preventing the occurrence of the cracking problem of the hogging moment bridge deck slab and greatly enhancing the durability of the structure. In addition, the technology does not need to additionally increase the using amount of construction materials, the anchoring piece 2, the inhaul cable 3 and the penetrating jack 4 which are adopted in the construction process can be repeatedly used, the construction cost is reduced, and the construction is simple and rapid.
According to the utility model discloses an embodiment of the second aspect, in step S2, hogging moment district concrete roof 6 mixes the expanding agent to compensate the shrink of hogging moment district concrete roof, that is to say, through adding suitable expanding agent in hogging moment district concrete roof 6, make the concrete shrinkage factor of hogging moment district concrete roof 6 reduce, thereby reach the shrink of compensation hogging moment district concrete roof 6, be favorable to making continuous composite beam bridge decking be in the pressurized state under long-term load effect always.
According to a further embodiment of the second aspect of the present invention, in step S5, when pouring the concrete slab in the other region except the hogging moment region, a proper expansion agent may be added to the concrete slab to compensate for the shrinkage of the concrete slab.
The utility model discloses the third aspect still provides a beam bridge.
According to the utility model discloses the beam bridge of third aspect, beam bridge adopt the utility model discloses the construction method of fracture is prevented in the continuous combination beam bridge hogging moment district of any one embodiment of second aspect obtains.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The utility model provides a continuous combination beam bridge hogging moment district anti-cracking construction equipment which characterized in that includes:
the anti-pulling and anti-shearing connecting piece is used for being arranged at the top of the steel beam in the hogging moment area of the continuous composite beam bridge;
when a hogging moment area concrete top plate is poured on the top of the hogging moment area steel beam with the uplift-resistant non-shear connector, the anchoring parts are correspondingly arranged at two ends of the hogging moment area concrete top plate in the length direction respectively, and the lower part of each anchoring part is used for anchoring in the hogging moment area concrete top plate;
the upper part of the anchoring part is connected with one end of the inhaul cable;
the center penetrating jack is arranged between the anchoring parts at the two ends of the hogging moment area concrete top plate in the length direction, wherein the other end of the stay cable on the anchoring part at one end of the two ends of the hogging moment area concrete top plate in the length direction is connected with one end of the center penetrating jack, the other end of the stay cable on the anchoring part at the other end of the hogging moment area concrete top plate in the two ends of the hogging moment area concrete top plate in the length direction is connected with the other end of the center penetrating jack, and the center penetrating jack is used for exerting pulling force on the stay cable to enable the hogging moment area concrete top plate to be pressed to generate axial deformation.
2. The continuous composite beam bridge hogging moment region anti-cracking construction equipment as claimed in claim 1, wherein the anti-pulling and non-shearing connecting member comprises a screw, a nut and a low-elastic modulus wrapping member, one end of the screw is connected with the nut, and the low-elastic modulus wrapping member is wrapped on the screw.
3. The hogging moment zone anti-cracking construction equipment of claim 2, wherein the radial thickness of the low-resilience modulus wrapping member is determined according to the calculated slippage, and the diameter of the nut is sized to prevent separation and lifting between the hogging moment zone concrete top plate and the hogging moment zone steel beam.
4. The continuous composite beam bridge hogging moment region anti-cracking construction equipment as claimed in claim 2, wherein the low-elastic-modulus wrapping member is a wrapping member made of foam, sponge or cloth.
5. The hogging moment area anti-cracking construction equipment of a continuous composite beam bridge as claimed in claim 1, wherein the anchoring member comprises an end plate, a stud or a steel bar provided on a lower surface of the end plate, and a connecting lug plate provided on an upper surface of the end plate, wherein when the anchoring member is anchored on the hogging moment area concrete roof plate, the stud is located in the hogging moment area concrete roof plate, the connecting lug plate is located above the hogging moment area concrete roof plate, and the connecting lug plate is used for connecting with one end of the guy cable.
6. The hogging moment region anti-cracking construction equipment of a continuous composite beam bridge as claimed in claim 5, wherein the connecting lug plate is provided with a mounting hole for connecting with one end of the stay cable.
7. The hogging moment zone anti-cracking construction equipment of continuous composite beam bridge as claimed in claim 5, wherein the pegs or the reinforcing bars are welded on the end plates, and the number and specification of the pegs or the reinforcing bars are determined according to the design tension of the stay cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921118895.3U CN210797280U (en) | 2019-07-16 | 2019-07-16 | Anti-cracking construction equipment for hogging moment area of continuous composite beam bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921118895.3U CN210797280U (en) | 2019-07-16 | 2019-07-16 | Anti-cracking construction equipment for hogging moment area of continuous composite beam bridge |
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| Publication Number | Publication Date |
|---|---|
| CN210797280U true CN210797280U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921118895.3U Withdrawn - After Issue CN210797280U (en) | 2019-07-16 | 2019-07-16 | Anti-cracking construction equipment for hogging moment area of continuous composite beam bridge |
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| CN (1) | CN210797280U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409305A (en) * | 2019-07-16 | 2019-11-05 | 清华大学 | Continuous composite beam bridge hogging moment area crack resistence construction equipment, construction method and beam bridge |
-
2019
- 2019-07-16 CN CN201921118895.3U patent/CN210797280U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110409305A (en) * | 2019-07-16 | 2019-11-05 | 清华大学 | Continuous composite beam bridge hogging moment area crack resistence construction equipment, construction method and beam bridge |
| CN110409305B (en) * | 2019-07-16 | 2024-04-30 | 清华大学 | Anti-cracking construction equipment and construction method for hogging moment area of continuous composite beam bridge and beam bridge |
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