CN210151553U - Open-hole shear key structure for steel web lining concrete - Google Patents
Open-hole shear key structure for steel web lining concrete Download PDFInfo
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- CN210151553U CN210151553U CN201920685461.5U CN201920685461U CN210151553U CN 210151553 U CN210151553 U CN 210151553U CN 201920685461 U CN201920685461 U CN 201920685461U CN 210151553 U CN210151553 U CN 210151553U
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Abstract
The utility model discloses a steel web inside lining is trompil shear force key structure for concrete, a serial communication port, including steel web, inside lining concrete and shear force key, inside lining concrete is formed in one side of steel web, the whole embedding of shear force key is in the inside lining concrete, the shear force key includes shear force key web and shear force key flange board, and shear force key web and shear force key flange board are mutually perpendicular, the one end of shear force key web with steel web welded fastening. The utility model provides a pair of adopt trompil shear force key structure can effectively strengthen the area of contact between steel web and the inside lining concrete, improves bonding strength, avoids inside lining concrete to lift the fracture, has reduced welding engineering volume, has improved the efficiency of construction, has carried out the large tracts of land to shaped steel simultaneously and has dug out, the structure dead weight that has significantly reduced when the material saving cost.
Description
Technical Field
The utility model relates to a bridge building structure field especially relates to a steel web inside lining is trompil shear force key structure for concrete.
Background
The steel web box girder bridge integrates the advantages of concrete and steel materials, has the advantages of light weight, high prestress efficiency and the like, and gradually develops into one of the most common bridge types in the 21 st century. Near the pivot, because influence such as anchor and the support of external prestressing force lock, the shear force and the moment of flexure value of this department are all very big, for avoiding too big stress concentration, improve the buckling resistance ability of steel web, generally can pour the inside lining concrete of certain thickness at the web.
In order to ensure that the steel web and the lining concrete work cooperatively and bear force together to avoid slippage, a shear key is usually arranged between the steel web and the lining concrete. Shear force key between current steel web and the inside lining concrete adopts stud connecting piece, channel-section steel and angle steel etc. usually to assist and guarantee its intensity with certain vertical and horizontal reinforcing bar net, this measure has avoided the vertical separation of concrete and steel web to a certain extent, has guaranteed bond strength. But many problems have been found in engineering practice: the welding difficulty is high, and the engineering quantity is large; horizontally lifting and taking off the concrete and the steel web plate; cracking of the lining concrete, etc.
The traditional connecting piece has low bonding performance, and particularly for a large-span steel-concrete composite beam bridge, the bending moment and the shearing force of a middle fulcrum are large, so that local concrete cracking or shearing force key bending damage of a connecting part often occurs. The cracking of the lining concrete can corrode the reinforcing steel bars and reduce the durability of the combined beam bridge; meanwhile, the fracture of the connecting part can cause the reduction of section rigidity, the deflection, the internal force and the like of the bridge structure are changed along with the reduction of section rigidity, and the safety of the bridge is influenced by serious persons.
In view of the above, there is a need to provide a novel shear key structure with anti-separation and anti-lifting functions.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a shear force connecting piece joint strength is low between to traditional steel web and inside lining concrete, the anti liftoff of level is weak, inside lining concrete defects such as local easy fracture, an adopt trompil T shape steel sheet connecting piece is provided, effectively strengthen area of contact between steel web and the inside lining concrete, improve the bonding strength, avoid inside lining concrete to lift the fracture, the welding engineering volume has been reduced, the efficiency of construction is improved, simultaneously, the large tracts of land is dug empty to shaped steel, the structure dead weight has significantly reduced when material saving cost.
In order to achieve the above object, the utility model provides a following technical scheme:
the embodiment of the application discloses steel web lining is trompil shear force key structure for concrete, including steel web, lining concrete and shear force key, lining concrete is formed in one side of steel web, the whole embedding of shear force key is in the lining concrete, the shear force key includes shear force key web and shear force key flange board, and shear force key web and shear force key flange board are perpendicular, the one end of shear force key web with steel web welded fastening.
Preferably, in the open-hole shear key structure for steel web-lined concrete, the shear key web and the shear key flange plate vertically form a T-shaped structure.
Preferably, in the open-hole shear key structure for the steel web lining concrete, the shear key web extends vertically along the surface of the steel web.
Preferably, in the above open-hole shear key structure for steel web lining concrete, longitudinal and transverse reinforcing mesh nets are arranged in the lining concrete.
As the utility model discloses a further improvement, in above-mentioned steel web inside lining is trompil shear key structure for concrete, at least one through-hole has been seted up on the shear key web.
Preferably, in the above perforated shear key structure for steel web lining concrete, longitudinal and transverse reinforcing mesh grids are arranged in the lining concrete, and longitudinal reinforcing steel bars are arranged in through holes of the shear key web in a penetrating manner.
As the utility model discloses a further improvement, in above-mentioned steel web inside lining is trompil shear key structure for concrete, at least one through-hole has been seted up on the shear key flange board.
Preferably, in the open-hole shear key structure for steel web lining concrete, a longitudinal reinforcing steel bar mesh net and a transverse reinforcing steel bar mesh net are arranged in the lining concrete, and the transverse reinforcing steel bars are tied to the longitudinal reinforcing steel bars to be distributed in a grid shape.
Preferably, in the open-hole shear key structure for concrete-lined steel web, the steel web is a corrugated steel web.
Preferably, in the open-hole shear key structure for steel web lining concrete, the shear key web is welded in parallel to the wave crest and the wave trough on the inner side of the corrugated steel web.
Compared with the prior art, the utility model has the advantages of:
1) the T-shaped shear key effectively increases the surface contact area of the steel web and the lining concrete, increases the friction force between interfaces and improves the bonding strength.
2) The T-shaped shear keys are welded on the inner sides of the steel web plates, the flange plates of the shear keys are parallel to the steel web plates, the effect of the stiffening plates is achieved, the buckling resistance of the web plates is improved, and buckling deformation of the steel web plates before construction of the lining concrete is effectively avoided.
3) After the T-shaped shear key is provided with the hole, the steel plate and the concrete of the shear key can respectively invade the inside of the other side to form a concrete pin, so that the engaging force between the steel plate of the shear key and the lining concrete is greatly improved; meanwhile, after the holes are formed in the shear key steel plates, the steel consumption is reduced, the cost is saved, the dead weight is reduced, and the spanning capacity of the bridge is improved.
4) The T-shaped shear key is provided with the wide and thick flange plate, has strong lifting resistance and avoids horizontal void caused by load, concrete shrinkage and the like.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of a perforated shear key structure for steel web lining concrete according to an embodiment of the present invention;
FIG. 2 is a top view of a perforated shear key structure for steel web lined concrete according to an embodiment of the present invention;
fig. 3 is a front view of a shear key web of an open-cell shear key structure for steel web lined concrete according to an embodiment of the present invention;
fig. 4 is a front view of a shear key flange plate of the perforated shear key structure for steel web lining concrete according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1, in an embodiment of the present application, an open-hole shear key structure for steel web-lined concrete is disclosed, which comprises a steel web 1, a shear key 2 and a lining concrete 5 (not shown in fig. 1, but shown in fig. 2).
One side of steel web 1 is formed with inside lining concrete 5, and the whole embedding of shear force key 2 is in inside lining concrete 5, and shear force key 2 one end and steel web 1 welded fastening, the inboard vertical parallel welding in proper order of steel web 1 have a plurality of shear force key 2 structures.
The shape of steel web 1 is the wave form steel web, and the wave form steel web can increase vertical support intensity, increases and the area of contact between the concrete, improves its whole resistance to deformation ability.
Referring to fig. 2, the shear key 2 comprises a shear key web 21 and a shear key flange plate 22, wherein the shear key web 21 and the shear key flange plate 22 are perpendicular.
The shear key web plate 21 and the shear key flange plate 22 vertically form a T-shaped structure, one longitudinal side of the shear key web plate 21 is welded to the longitudinal middle of the shear key flange plate 22 through carbon dioxide gas shielded welding, so that the two parts form a T-shaped structure, the shear key 2 of the T-shaped structure is inversely placed on the inner side of the steel web plate 1, the other longitudinal side of the shear key web plate 21 is welded to the inner side of the steel web plate 1 to form a whole, and the shear key web plate 21 is welded to the wave crests and the wave troughs on the inner side of the corrugated steel web plate 1 in parallel.
In other embodiments, the shear key webs and shear key flange plates may also be bent to form an L-shaped structure. The shear key web 21 extends vertically along the surface of the steel web 1.
In the technical scheme, the shear key T-shaped steel plates are welded in parallel with the inner sides of the corrugated steel webs to play a role of stiffening plates, the buckling resistance of the webs is improved, and the buckling deformation of the steel webs before the construction of the lining concrete is effectively avoided.
The thickness of the shear key web plate 21 is about 2mm, the width of the web plate is 100mm, and a plurality of web plate holes 211 with the diameter of 30mm and uniform distribution are formed in the shear key web plate 21, as shown in fig. 3.
The thickness of the shear key flange plate 22 is about 2mm, the width of the flange plate is about 60mm, and a plurality of flange plate holes 221 with the diameter of 15mm and uniform distribution are also formed in the shear key flange plate 21, as shown in fig. 4.
According to the technical scheme, after the T-shaped steel plate of the shear key is perforated, the steel plate and the concrete can respectively invade into the opposite side to form the concrete pin, so that the engaging force between the steel plate and the lining concrete is greatly improved; meanwhile, after the steel plate is perforated, the steel consumption is reduced, the cost is saved, the dead weight is reduced, and the spanning capability of the bridge is improved.
Be provided with vertical and horizontal reinforcing bar net in the inside lining concrete 5, wear to be equipped with many fore-and-aft reinforcing bars 3 in the through-hole of height such as web hole 211 of shear force key web, many horizontal reinforcing bars 4 ligature on fore-and-aft reinforcing bar, make it present latticed distribution.
In this technical scheme, can further guarantee the intensity of inside lining concrete through the reinforcing bar net that sets up.
And a template (not marked in the figure) is further installed on the inner side of the steel web plate 1 and the outer side of the shear key 2, and the template and the steel web plate 1 enclose a hollow accommodating chamber.
The lining concrete 5 is formed by pouring concrete into a hollow chamber formed by enclosing the template and the steel web plate 1 for condensation, and mutually invades the shear key web plate 21, the shear key flange plate 22, the web plate hole 211 and the flange plate hole 221 of the T-shaped shear key 1 into each other to form a concrete sheath, so that the lining concrete is tightly bonded with the steel web plate 1, and the biting force is greatly improved.
The application also provides a construction method of the open-hole shear key structure for the steel web lining concrete, which comprises the following steps:
the method comprises the following steps of 1, cutting a shear key web plate 21 and a shear key flange plate 22 of a shear key 2 according to a construction drawing by the T-shaped shear key (the thickness of a steel plate of the shear key 2 is about 2mm, the width of the shear key web plate 21 is 100mm, and the width of the shear key flange plate 22 is about 60mm), and drilling the shear key web plate 21 and the shear key flange plate 22 (the diameter of a web plate hole 211 is about 30mm, and the diameter of a flange plate hole 221 is 15 mm).
Note: the trompil can save material, alleviates the dead weight except, can also be convenient for the concrete inflow, forms the concrete round pin, improves the ability of shearing.
2. After the shear key flange plates 22 and the shear key web plates 21 are assembled, a complete T-shaped whole is formed by adopting carbon dioxide gas shielded welding, and the T-shaped whole is inversely placed on the inner side of the corrugated steel web plate 1 and longitudinally welded into a whole.
3. Through longitudinal steel bars 3 are vertically arranged in through holes 211 with the same height as the shear key webs 21 along the bridge, and then transverse steel bars 5 are bound.
4. And (3) installing a template on the inner side of the corrugated steel web plate 1, and pouring lining concrete 5.
The utility model discloses a utility model patent advantage lies in: 1) the steel web and the lining concrete can be effectively enhanced in contact area, the friction force between interfaces is increased, the bonding strength is improved, the lining concrete is prevented from being lifted and cracked, the welding engineering quantity is reduced, the construction efficiency is improved, the profile steel is hollowed out in a large area, and the self weight of the structure is greatly reduced while the material cost is saved. 2) The buckling resistance of the steel web is improved, and buckling deformation of the steel web before construction of the lining concrete is effectively avoided. 3) The engaging force between the shear key and the lining concrete is improved; meanwhile, after the holes are formed in the shear keys, the steel consumption is reduced, the cost is saved, the dead weight is reduced, and the spanning capacity of the bridge is improved. 4) The wide and thick flange plate has strong anti-lifting capability, and avoids horizontal separation caused by load, concrete shrinkage and the like.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (10)
1. The open-hole shear key structure for the steel web lining concrete is characterized by comprising a steel web, lining concrete and shear keys, wherein the lining concrete is formed on one side of the steel web, the shear keys are integrally embedded in the lining concrete, each shear key comprises a shear key web and a shear key flange plate, the shear key webs are perpendicular to the shear key flange plates, and one end of each shear key web is welded and fixed with the steel web.
2. The open-hole shear key structure for steel web lining concrete according to claim 1, wherein the shear key web and the shear key flange plate vertically form a T-shaped structure.
3. The open-celled shear key structure for steel web-lined concrete of claim 1, wherein the shear key web extends vertically along a surface of the steel web.
4. A steel web lined concrete open-cell shear key structure as claimed in claim 1, wherein longitudinal and transverse reinforcing mesh grids are provided within the lined concrete.
5. The open-hole shear key structure for steel web lining concrete according to claim 1, wherein at least one through hole is formed in the shear key web.
6. The open-hole shear key structure for steel web lining concrete according to claim 5, wherein longitudinal and transverse reinforcing mesh nets are arranged in the lining concrete, and longitudinal reinforcing steel bars are arranged in the through holes of the shear key webs in a penetrating mode.
7. The open-hole shear key structure for steel web lining concrete according to claim 1, wherein at least one through hole is formed in the shear key flange plate.
8. The open-cell shear key structure for steel web lining concrete according to claim 7, wherein a longitudinal and a transverse reinforcing mesh are arranged in the lining concrete, and the transverse reinforcing mesh is tied to the longitudinal reinforcing mesh to form a grid distribution.
9. The open-hole shear key structure for steel web lined concrete of claim 1, wherein the steel web is a corrugated steel web.
10. The open-hole shear key structure for steel web lining concrete according to claim 9, wherein the shear key web is welded in parallel to the wave crests and the wave troughs on the inner side of the corrugated steel web.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920685461.5U CN210151553U (en) | 2019-05-14 | 2019-05-14 | Open-hole shear key structure for steel web lining concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920685461.5U CN210151553U (en) | 2019-05-14 | 2019-05-14 | Open-hole shear key structure for steel web lining concrete |
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| CN210151553U true CN210151553U (en) | 2020-03-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174837A (en) * | 2021-05-12 | 2021-07-27 | 中交第二公路勘察设计研究院有限公司 | Wave form steel web combination beam bridge structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174837A (en) * | 2021-05-12 | 2021-07-27 | 中交第二公路勘察设计研究院有限公司 | Wave form steel web combination beam bridge structure |
| CN113174837B (en) * | 2021-05-12 | 2022-08-30 | 中交第二公路勘察设计研究院有限公司 | Wave form steel web combination beam bridge structure |
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