CN113389134B - Steel plate strip suspension bridge and construction method thereof - Google Patents
Steel plate strip suspension bridge and construction method thereof Download PDFInfo
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- CN113389134B CN113389134B CN202110634490.0A CN202110634490A CN113389134B CN 113389134 B CN113389134 B CN 113389134B CN 202110634490 A CN202110634490 A CN 202110634490A CN 113389134 B CN113389134 B CN 113389134B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The application relates to the technical field of buildings and provides a steel plate suspension bridge and a construction method thereof, wherein the steel plate suspension bridge comprises a bridge body and two conversion connecting devices; the bridge body comprises a steel plate strip; each conversion connecting device comprises an anchoring connecting piece and a steel plate belt connecting piece, the anchoring connecting piece is connected with the anchor cable device, and the steel plate belt connecting piece is connected with the end part of the steel plate belt. The construction steps of the steel plate strip suspension bridge are as follows: constructing a bridge body, laying or hoisting steel plate strips along the span direction of the bridge body to be constructed, and constructing anchor cable devices on two sides of the bridge body to be constructed; assembling two conversion connecting devices; and connecting the steel plate belt connecting piece with the end part of the steel plate belt, and connecting the anchoring connecting piece with the anchor cable device. The beneficial effect of this application is: the structure of the suspension bridge is simplified, the size is reduced, the suspension bridge is more attractive and ornamental, the steel consumption is small, the construction cost is reduced, and the later maintenance is convenient.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a steel plate strip suspension bridge and a construction method thereof.
Background
A suspension bridge, also called a suspension bridge or a suspension bridge, mainly comprises a cable, suspenders and a bridge floor, wherein the cable is used as a main bearing component, two ends of the cable are anchored on two banks through anchor cable devices, and the cable is provided with a plurality of suspenders and is connected with the bridge floor through the suspenders. The suspension bridge comprises a highway suspension bridge and a landscape walking suspension bridge according to different use environments. In the suspension bridge for highway, in order to avoid deformation of the bridge deck along with the cable when the vehicle passes through, a rigid beam (also called stiffening beam) is generally arranged, the bridge deck is laid on the rigid beam, and the rigid beam is hung on the cable through a hanging rod; and large-scale highway suspension bridge can directly adopt box girder as the rigid beam in order to promote the deck rigidity, but corresponding structure also can be more complicated, and construction cost is higher, and the volume is bigger. In particular, the used components (such as a suspender) are more, the later maintenance is inconvenient, and the maintenance cost is higher. The landscape walking suspension bridge has relatively low requirement on the deformation resistance of the bridge deck, usually no rigid beam or a small number of rigid beams are arranged, the structure is simpler and the construction cost is low compared with a highway suspension bridge, but the visual encumbrance is increased due to the existence of a large number of suspension rods, and the ornamental effect is influenced. In addition, the highway suspension bridge and the landscape walking suspension bridge have the common defects that: the rigidity is small, and large deflection and vibration are easy to generate under the action of load. Especially, the landscape walking suspension bridge has large vibration and disturbance degree under the load action, and has certain potential safety hazard.
Disclosure of Invention
The invention aims to overcome the problems of large volume and complex structure of the existing suspension bridge, and provides a steel plate suspension bridge, which comprises the following components:
a bridge body; the bridge body comprises at least one steel plate strip; and
the two conversion connecting devices are respectively arranged at two ends of the bridge body, each conversion connecting device comprises an anchoring connecting piece and a steel plate belt connecting piece, the anchoring connecting pieces are connected with the anchor cable devices, and the steel plate belt connecting pieces are connected with the end parts of the steel plate belts.
Furthermore, the bridge body further comprises two first connecting pieces respectively connected with two ends of the steel plate strip, and the steel plate strip connecting piece of each conversion connecting device is connected with one first connecting piece.
Further, the bridge body also comprises a concrete precast slab arranged on the upper surface of the steel plate strip.
Furthermore, the number of the steel plate strips is at least two, each steel plate strip extends along the span direction of the bridge body, and a gap exists between at least two steel plate strips.
The beneficial effects of the further scheme are as follows: the multiple steel plate belts can not only reduce the weight of the bridge body, but also disperse the vibration area of the bridge body.
Further, the material of the steel plate strip is Q690D steel.
Further, the anchor connecting piece comprises an anchor mounting plate, and the anchor mounting plate is used for being connected with the anchor cable device; the steel plate strip connecting piece comprises a web and wing plates, the web is connected with the anchoring mounting plate, the web is connected with the wing plates, and the wing plates are connected with the end portions of the steel plate strip.
The beneficial effects of the further scheme are as follows: the anchor mounting plate is connected with the anchor cable device, so that the anchor cable device is high in construction operability and convenient to construct.
Further, the anchor linkage further comprises:
the anchoring stiffening plate is connected with the anchoring mounting plate; and
the anchoring limiting plate corresponds the setting with the anchoring mounting panel, the anchoring limiting plate with the anchoring stiffening plate is connected, be provided with spacing hole on the anchoring limiting plate, be provided with on the anchoring mounting panel and wear to establish the hole, spacing hole with wear to establish the corresponding setting of hole.
The beneficial effects of the further scheme are as follows: the anchoring stiffening plate improves the strength of the anchoring mounting plate, reduces the deformation of the anchoring mounting plate and improves the connection reliability of the steel plate strip of the bridge body and the anchor cable device. The anchor cable device passes through the limiting hole and then is connected with the anchoring mounting plate, the limiting hole plays a role in pre-positioning the anchor cable device, the mounting precision of the anchor cable device is improved, and the balance of stress of each anchor cable device and the anchoring mounting plate is guaranteed.
Further, the steel plate strip connector further comprises:
the connecting cover plate is arranged at a distance from the wing plate;
the filling plate is arranged between the connecting cover plate and the wing plate; and
and the fastening piece is connected with the connecting cover plate and the wing plate and is used for fixing the end part of the steel plate strip between the connecting cover plate and the wing plate.
The beneficial effects of the further scheme are as follows: the connecting cover plate can disperse the force applied to the wing plate by the steel plate strip, can limit the end part of the steel plate strip from jumping or moving along the direction perpendicular to the plate surface, and has better connecting effect with the wing plate. The filling plate can limit the extension displacement of the end part of the steel plate strip along the length direction of the steel plate strip, and can also relieve the pressure on the fastening piece, so that the end part of the steel plate strip is reliably connected with the wing plate.
Further, each conversion connecting device further comprises a first anti-pulling piece and/or a second anti-pulling piece, the first anti-pulling pieces are arranged on the anchoring connecting pieces and/or the steel plate strip connecting pieces, and the second anti-pulling pieces are arranged on the steel plate strip connecting pieces.
The beneficial effects of the further scheme are as follows: through the effect of first resistance to plucking piece, make conversion connecting device effectively fix on the cushion cap of pontic to with the transition of the power of steel sheet band to the cushion cap on when guaranteeing conversion connecting device self connection stability. The conversion connecting device is stably connected with the abutment of the bridge body under the action of the second anti-pulling piece, and when the steel plate belt of the bridge body has certain deflection or vibration under the load action, the second anti-pulling piece is effectively connected with the bridge body, so that the influence of the deflection or vibration of the steel plate belt on the anchor cable device can be reduced.
The steel plate with the suspension bridge has the beneficial effects that: the steel plate belt replaces the cable, the suspender and the bridge floor of the existing suspension bridge, so that the structure of the suspension bridge body is simplified, and the size is reduced. Because there is not jib and cable above the steel sheet area, compare current view walking suspension bridge, have more aesthetic feeling and sight, compare current highway suspension bridge, the steel consumption is little, has reduced construction cost, and later maintenance is convenient, and economic benefits is good. In addition, the two conversion connecting devices are adopted to effectively connect the anchor cable device and the end part of the steel plate belt, the anchor cable device is not influenced by the deflection and vibration of the steel plate belt under the load action, the connection safety and reliability of the steel plate belt and the anchor cable device are ensured, and the bridge body is always anchored on two sides safely and stably.
The invention also provides a construction method of the steel plate suspension bridge, which comprises the following steps:
and 3, connecting the steel plate belt connecting piece with the end part of the steel plate belt, and connecting the anchoring connecting piece with the anchor cable device.
The construction method of the steel plate with the suspension bridge has the beneficial effects that: the steel plate strip is used as the bridge deck of the suspension bridge, construction of a cable and a suspender is not needed, the bridge construction process is simplified, the construction cost is reduced, and the construction efficiency is improved. Adopt conversion connecting device to be connected anchor rope device and steel sheet area, make conversion connecting device as the atress transition piece, anchor rope device construction maneuverability is strong, and anchor rope device construction is more convenient, and anchor rope device does not receive the influence of steel sheet area disturbance degree and vibration under the load effect moreover, has guaranteed the security and the reliability of being connected of steel sheet area and anchor rope device.
Drawings
Fig. 1 is a schematic front view of a steel plate suspension bridge according to the present invention.
Fig. 2 is a schematic side view cross-sectional structure of a steel plate strip and a bridge deck of the steel plate strip suspension bridge in fig. 1.
Fig. 3 is a schematic perspective view of the transition joint device of the steel plate strip suspension bridge in fig. 1.
Fig. 4 is a schematic perspective view of the conversion connector of fig. 3 with a second side panel removed.
Fig. 5 is a front view schematically illustrating the conversion coupling device of fig. 4 with the anchor cable device and the first connecting member coupled thereto.
Fig. 6 is a schematic top view of the conversion coupling device of fig. 3 with the anchor cable device and the first connecting member connected thereto.
Fig. 7 is a top view of the transfer coupling device of fig. 6 with the second top plate, wing plate and first coupling member removed.
Fig. 8 is a front view of the web of the transition joint assembly of fig. 5.
Fig. 9 is a schematic top view of the row of anchoring chambers of fig. 5.
Fig. 10 is a schematic top view of the wing panel of fig. 5.
Fig. 11 is a schematic top view of the filler plate of fig. 5.
Fig. 12 is a schematic top view of the connection cover plate in fig. 5.
Fig. 13 is a schematic view of a tensioning sequence after the anchor cable device is installed on the conversion connecting device of the steel plate with the suspension bridge.
FIG. 14 is a stress diagram of a computational analysis model of the steel plate conversion connecting device with a suspension bridge according to the invention under the action of load.
Fig. 15 is a schematic diagram of the displacement of the computational analysis model of the conversion connecting device with the suspension bridge of the steel plate under the action of load.
FIG. 16 is a stress diagram of the steel plate with a suspension bridge under the action of constant load and live load.
FIG. 17 is a stress diagram of the steel plate with a suspension bridge under the action of wind load.
FIG. 18 is a stress diagram of the steel plate with a suspension bridge under the action of temperature load.
In the figure, 1-steel strip; 1.1-a first connector; 2-anchor cable means; 3-anchoring the connecting piece; 3.1-anchoring the mounting plate; 3.2-anchoring a limit plate; 3.2.1-limiting hole; 3.3-anchoring the stiffening plate; 3.4-anchoring cavities; 3.5-anchoring chamber; 3.6-first base plate; 3.7-first top plate; 3.8-first side plate; 4-steel plate belt connectors; 4.1-web; 4.2-wing plate; 4.3-second top panel; 4.4-a second base plate; 4.4.1-positioning groove; 4.5-second side plate; 4.6-web stiffening plate; 4.7-first connecting bolt; 4.8-second connecting bolt; 4.9-connecting the cover plate; 4.10-filling plate; 4.11-threaded hole; 5-a first anti-pulling piece; 5.1-a first anti-drawing steel plate; 5.2-anti-pulling end plate; 5.3-first anti-plucking peg; 6-a second extraction resistance; 6.1-second tensile steel plate; 6.2-second anti-plucking peg; 7-bridge abutment; 8-a first platform; 9-a first bridge pile; 10-a second bearing platform; 11-a second bridge pile; 12-rubber pad; 13-mounting bolts; 14-a railing; 15-handrails; 16-a connecting plate; 17-bracing steel struts; 18-a diagonal bracing head; 19-precast concrete slab.
Detailed Description
The invention is described in further detail below with reference to figures 1 to 18 and specific examples.
A steel plate suspension bridge as shown in fig. 1 and 2, comprising: the bridge comprises a bridge body, an anchor cable device 2, a conversion connecting device, a bridge abutment 7, a first bearing platform 8, a first bridge pile 9, a second bearing platform 10, a second bridge pile 11, a rubber pad 12 and a mounting bolt 13. Establishing a finite element analysis model according to the steel plate strip suspension bridge shown in figure 1, carrying out load combination according to the permanent load, variable action, seismic action and the like of the design specification, and finally determining the design and construction requirements of each part of the steel plate strip suspension bridge.
Two conversion connecting devices are respectively arranged at two ends of the bridge body, each conversion connecting device comprises an anchoring connecting piece 3 and a steel plate belt connecting piece 4, the anchoring connecting pieces 3 are connected with the anchor cable devices 2, and the steel plate belt connecting pieces 4 are connected with the end parts of the steel plate belts 1.
The bridge body comprises a steel plate strip 1, a first connecting piece 1.1 and a concrete precast slab 19. Two ends of the steel plate belt 1 are respectively connected with two first connecting pieces 1.1, and the steel plate belt connecting piece 4 of each conversion connecting device is connected with one first connecting piece 1.1.
Specifically, the method comprises the following steps: the steel plate belt 1 is laid along the span direction of the steel plate belt suspension bridge to be constructed, the upper surface of the steel plate belt 1 can be directly used as a bridge floor, or a bridge deck is additionally arranged on the upper surface of the steel plate belt 1. In this embodiment, a concrete precast slab 19 is laid on the upper end surface of the steel plate strip 1 as a bridge deck. In the present embodiment, the number of the steel plate strips 1 is two, and the two steel plate strips 1 are arranged at a distance from each other. It will be appreciated that the number of steel plate strips may also be one or more than two, depending on the actual cost requirements. In this embodiment, the material of the steel plate strip 1 is Q690D high-strength steel.
The first connecting member 1.1 may be a separate structure connected to the steel plate strip 1, or may be an anchoring area at an end of the steel plate strip 1, and in this embodiment, the first connecting member 1.1 is a connecting member connected to the end of the steel plate strip 1. As shown in fig. 6, the two steel plate strips 1 are parallel and spaced, and the end portions of the two steel plate strips 1 are connected with first connecting pieces 1.1 and connected with steel plate strip connecting pieces 4 through the first connecting pieces 1.1. For a bridge body with the same width, compared with a whole steel plate strip, two spaced steel plate strips 1 are lighter in weight, and a vibration area of the bridge body is dispersed, for example, when the first steel plate strip 1 is subjected to action force in the height direction to vibrate, the amplitude of the second steel plate strip 1 in the height direction is smaller, and finally, the amplitude of a bridge deck or a bridge deck is smaller than that of the first steel plate strip 1, so that the stability of the bridge deck or the bridge deck is ensured.
A rubber layer is filled between the concrete precast slab 19 and the steel plate strip 1 or a rubber cushion 12 or a cushion layer made of other materials is laid on the rubber cushion, and the concrete precast slab 19, the rubber cushion 12 and the steel plate strip 1 are fixedly connected through a mounting bolt 13 or other connecting structures. To improve safety, the concrete precast slab 19 may be further provided with balustrades 14 at both sides thereof. A handrail 15 may be provided on the balustrade 14.
The cable bolt means 2 is an existing anchoring means, for example the cable bolt means 2 may be a cable bolt or a cable assembly. After the steel plate belt 1 is laid along the span direction of the steel plate belt suspension bridge to be constructed, the position or the size of a first connecting piece 1.1 of the steel plate belt 1 is determined according to the surrounding environment and the design of the steel plate belt suspension bridge, anchor cable devices 2 are constructed on two sides of the steel plate belt suspension bridge, the anchor cable devices 2 can be anchored in mountain rocks and can also be anchored in a structure of early construction on the two sides of the steel plate belt suspension bridge, and the anchor cable devices 2 are connected with the first connecting piece 1.1 of the steel plate belt 1 through conversion connecting devices. The anchor cable device 2 in this embodiment is constructed by using an existing construction method.
In order to make the steel plate belt suspension bridge structure more stable, a first bridge pile 9 and a second bridge pile 11 are further arranged below the steel plate belt suspension bridge, wherein the first bridge pile 9 is located below the first connecting piece 1.1, and the second bridge pile 11 is located below the steel plate belt 1. A first bearing platform 8 is fixed at the upper end of the first bridge pile 9, and a second bearing platform 10 is fixed at the upper end of the second bridge pile 11. The upper end fixedly connected with abutment 7 and the conversion connecting device of first cushion cap 8, and conversion connecting device still with abutment 7 fixed connection, conversion connecting device is in one side that steel sheet area 1 was kept away from to abutment 7, thereby conversion connecting device is connected the back with first connecting piece 1.1, at least partial first connecting piece 1.1 is in the upper end of abutment 7, abutment 7 provides effectual strong point for this part first connecting piece 1.1, and abutment 7 can stabilize conversion connecting device, avoid conversion connecting device to appear horizontal displacement under the pulling force effect of steel sheet area 1. The abutment 7 and the first bearing platform 8 can be integrally cast, and the construction mode of the first bridge pile 9 and the second bridge pile 11 can adopt the prior art.
The second bearing platform 10 is connected with a diagonal support piece and a connecting plate 16. The diagonal stay may include a diagonal steel strut 17 and a diagonal stay head 18. One end of the connecting plate 16 is fixedly connected with the second bearing platform 10, and the other end of the connecting plate 16 is fixedly connected with the first bearing platform 8. The top of the inclined supporting head 18 is fixedly connected with the steel plate strip 1 and is used for supporting the steel plate strip 1. The top of the diagonal bracing steel strut 17 is connected with a diagonal bracing head 18, and one end of the diagonal bracing steel strut 17 far away from the diagonal bracing head 18 is fixedly connected with the second bearing platform 10. The diagonal support members divide the steel plate strip 1 into a main span section and an auxiliary span section along the span direction of the steel plate strip, so as to disperse and reduce the axial force, the shearing force and the stress of the steel plate strip suspension bridge, wherein the length of the main span section is longer than that of the auxiliary span section, for example, the length of the steel plate strip suspension bridge in the embodiment is 88.1 meters, the span of the main span section is 63.8 meters, and the span of the auxiliary span section is 24.3 meters. The thickness of the steel plate strip 1 is 0.04 m, and the steel plate strip 1 is made of Q690D high-strength steel. The width of the concrete precast slab 19 in this embodiment is preferably 2.7 m, and the widths of the two steel plate strips 1 are the same, and are both 0.75 m.
With reference to fig. 16 to 18, a finite element model of the steel plate suspension bridge is established by using Midas/Civil, strength, rigidity and stability analysis are performed on the structure of the steel plate suspension bridge, and the influence of geometric nonlinearity is considered during calculation. Wherein, fig. 16 is a stress diagram under the action of a constant load and a live load of the steel plate with the suspension bridge, fig. 17 is a stress diagram under the action of a wind load of the steel plate with the suspension bridge, and fig. 18 is a stress diagram under the action of a temperature load of the steel plate with the suspension bridge. As can be seen from FIGS. 16 to 18, the maximum stress under a constant load is 123.1 MPa; the maximum stress generated by the action (namely live load) of the crowd is 95.30 MPa; the maximum stress caused by the wind load effect is 57.9 MPa; the temperature rise and the temperature drop of the structure respectively cause the steel plate strip 1 to generate stress of-64.1 MPa and 36.6 MPa. The steel plate strip 1 at the inclined supporting head 18 is formed by mechanical bending during construction, the bending radius is 17m, and initial bending stress is formed in the steel plate strip 1. After the stress is taken into account, the total stress of the steel plate strip 1 at the inclined supporting head 18 under the constant load working condition is 265.73MPa, the total stress at the inclined supporting head 18 under the maximum envelope value state is 296.50MPa, all the stresses are lower than the design value of the Q690D steel plate strip 1, and a certain margin is provided. Carrying out fatigue checking calculation on the welding position of the steel plate strip according to 'steel structure design specification', wherein the maximum stress amplitude of the structure is 73.3MPa under the action of dynamic load of people, and the normal amplitude fatigue allowable stress is represented by a formula:
the calculated pressure is 144MPa, and the structure can meet the requirement of fatigue.
Referring to fig. 3 to 12, the conversion coupling means includes an anchor coupling member 3, a steel band coupling member 4, and a pulling-resistant member. The anchor connecting piece 3 is used for connecting the anchor cable device 2, the steel plate belt connecting piece 4 is used for connecting the first connecting piece 1.1 of the steel plate belt 1, the anti-pulling piece is used for installing and fixing the conversion connecting device on the bridge abutment 7 and the first bearing platform 8, the force applied by the steel plate belt 1 is transferred to the bearing platform while the connection stability of the conversion connecting device is guaranteed, and the influence of the deflection or vibration of the steel plate belt 1 on the anchor cable device 2 can be greatly reduced.
The anchoring connecting piece 3 comprises an anchoring mounting plate 3.1, an anchoring limiting plate 3.2, an anchoring reinforcing plate 3.3, an anchoring cavity 3.4, an anchoring chamber 3.5, a first bottom plate 3.6, a first top plate 3.7 and two first side plates 3.8.
The steel plate strip connecting piece 4 comprises a web plate 4.1, a wing plate 4.2, a second top plate 4.3, a second bottom plate 4.4, two second side plates 4.5, a web plate stiffening plate 4.6, first connecting bolts 4.7, second connecting bolts 4.8, a connecting cover plate 4.9 and a filling plate 4.10.
The anti-pull element comprises a first anti-pull element 5 and a second anti-pull element 6.
Specifically, the first bottom plate 3.6 is horizontally arranged, the bottom of the anchoring mounting plate 3.1 is welded and fixed with the first bottom plate 3.6, the anchoring mounting plate 3.1 is obliquely arranged, as shown in fig. 1 and 3, the inclination angle of the anchoring mounting plate 3.1 corresponds to the set angle of the anchor cable device 2 with the suspension bridge on the steel plate, and the anchoring mounting plate 3.1 is as perpendicular as possible to the anchor cable device 2. The center of the anchoring installation plate 3.1 is welded and fixed with the web plate 4.1. The anchor limiting plate 3.2 is on a parallel with the setting of anchor mounting panel 3.1, and anchor limiting plate 3.2 interval locates one side of anchor mounting panel 3.1 back to web 4.1, the bottom and the first bottom plate 3.6 welded fastening of anchor limiting plate 3.2, be equipped with on the anchor limiting plate 3.2 and be used for anchor rope device 2 to pass spacing hole 3.2.1 with the radial displacement of restriction anchor rope device 2, be provided with the wear-to-establish hole on the anchor mounting panel 3.1, spacing hole 3.2.1 corresponds the setting with the wear-to-establish hole, when anchor rope device 2 installs, pass spacing hole 3.2.1 in proper order and wear-to-establish the hole. First roof 3.7 slope setting, the one end of first roof 3.7 and the top welded fastening of anchor mounting panel 3.1, the other end of first roof 3.7 and the top welded fastening of anchor limiting plate 3.2, in this embodiment, first roof 3.7 is perpendicular to anchor mounting panel 3.1 and anchor limiting plate 3.2. Two first curb plate 3.8 erect the setting, and one of them first curb plate 3.8 and anchor mounting panel 3.1 and anchor limiting plate 3.2 are with the lateral part welded fastening of one side, and another first curb plate 3.8 and anchor mounting panel 3.1 and anchor limiting plate 3.2 are with the lateral part welded fastening of another one side.
The first bottom plate 3.6, the first top plate 3.7, the anchoring mounting plate 3.1, the anchoring limiting plate 3.2 and the two first side plates 3.8 surround to form a totally-enclosed frame structure, and of course, the first bottom plate 3.6, the first top plate 3.7, the anchoring mounting plate 3.1 and the anchoring limiting plate 3.2 surround to form a semi-enclosed frame structure. The inner cavity of the frame structure is formed with an anchoring cavity 3.4. The anchoring reinforcing plate 3.3 is arranged in the anchoring cavity 3.4 or the anchoring reinforcing plate 3.3 is arranged between the anchoring mounting plate 3.1 and the anchoring limiting plate 3.2, the anchoring reinforcing plate 3.3 is vertical to the anchoring mounting plate 3.1 and the anchoring limiting plate 3.2, and the anchoring reinforcing plate 3.3 is welded and fixed with the anchoring limiting plate 3.2 and the anchoring mounting plate 3.1.
As shown in fig. 5, six anchor stiffening plates 3.3 are arranged in parallel at intervals along the height direction of the anchor mounting plate 3.1, and two adjacent anchor stiffening plates 3.3 divide the anchor cavity 3.4 into anchor chambers 3.5 with smaller space. The corresponding limiting hole 3.2.1 and the through hole are communicated with the same anchoring chamber 3.5, the installed anchor cable device 2 penetrates through the anchoring chamber 3.5, the strength of the anchoring mounting plate 3.1 corresponding to the anchoring chamber 3.5 is higher, and therefore the anchor cable device 2 is more reliably connected.
As shown in fig. 13, 24 anchor cable devices 2 of the present embodiment should be installed and constructed according to a standard construction sequence of the prestressed anchor cables, wherein the tensioning sequence of the anchor cable devices 2 is individually tensioned from bottom to top and from inside to outside, and numbers 1-24 corresponding to the 24 anchor cable devices 2 in fig. 13 are the tensioning sequence of the anchor cable devices 2.
With reference to fig. 5, 6, and 9, in this embodiment, 3 rows of anchor chambers 3.5 in which the anchor cable devices 2 are installed are provided, the anchor cable devices 2 corresponding to the lowermost anchor chamber 3.5 are installed first, and in the 8 anchor cable devices 2 in the lowermost row, the anchor cable devices 2 in the middle of the inner side are installed first, and then the anchor cable devices 2 in the outer side are installed, after all the 8 anchor cable devices 2 in the lowermost row are installed, the 8 anchor cable devices 2 corresponding to the anchor chamber 3.5 in the upper row are installed again in the same order from inside to outside, and finally, the anchor cable devices 2 corresponding to the uppermost anchor chamber 3.5 are installed again. And tensioning the anchor cable devices 2 one by one according to the installation sequence of the anchor cable devices. By connecting the anchor cable devices 2 in an orderly manner, the fastening effect of the anchor cable devices 2 and the anchoring connecting pieces 3 can be optimized, and the stress of each anchor cable device 2 is uniform.
Because the anchor cable device 2 passes through the limiting hole 3.2.1 and then is connected with the anchoring mounting plate 3.1, the limiting hole 3.2.1 can realize the prepositioning of the anchor cable device 2, improve the mounting precision of the anchor cable device 2 and ensure that the stress of each anchor cable device 2 and each anchoring mounting plate 3.1 is balanced. Through the effect of anchor room 3.5 and anchor chamber 3.4, improved the bulk rigidity of anchor connecting piece 3 to realize anchor rope device 2's dual fixed under the effect of anchor mounting panel 3.1 and anchor limiting plate 3.2, guarantee anchor rope device 2's connection reliability and connection stability.
As shown in fig. 3, 5 and 8, the web 4.1 is vertically arranged and perpendicular to the anchor mounting plate 3.1, and the web 4.1 has an inclined front end surface which is welded and fixed to the center of the anchor mounting plate 3.1. The web 4.1 also has a horizontal bottom end face for welding with the second base plate 4.4, and the front end of the second base plate 4.4 is welded with the first base plate 3.6. The web 4.1 also has a horizontal top end face for welding with the horizontal wing 4.2. Still be equipped with the top face of slope between the horizontal top face of web 4.1 and the preceding terminal surface of slope, the welding of the top face of this slope has the second roof 4.3 of slope, and the front end of second roof 4.3 and the top welded fastening of anchor mounting panel 3.1, the rear end of second roof 4.3 and the front end welded fastening of pterygoid lamina 4.2, second roof 4.3 can be formed by the concatenation of polylith steel sheet, during the installation, second roof 4.3 can accomplish welding construction at last. The two second side plates 4.5 are both parallel to the first side plate 3.8, and the distance between the two second side plates 4.5 is smaller than the distance between the two first side plates 3.8. One of the second side plates 4.5 is welded and fixed with the side part of the same side of the wing plate 4.2, the second top plate 4.3 and the second bottom plate 4.4, the second side plate 4.5 is also welded and fixed with the plate surface of the anchoring mounting plate 3.1, the other second side plate 4.5 is welded and fixed with the side part of the other same side of the wing plate 4.2, the second top plate 4.3 and the second bottom plate 4.4, and the other second side plate 4.5 is also welded and fixed with the plate surface of the anchoring mounting plate 3.1. The wing plate 4.2, the second top plate 4.3, the anchoring mounting plate 3.1, the second bottom plate 4.4 and the second side plate 4.5 surround to form a semi-closed space, and one end of the semi-closed space, which is far away from the anchoring mounting plate 3.1, is an open end. The second anti-pulling piece 6 is arranged at the opening end, and the second anti-pulling piece 6 is welded with the second side plate 4.5 and the second bottom plate 4.4 to seal the semi-closed space into a fully-closed space. The anchoring chamber 3.5 is communicated with the semi-closed space or the fully closed space through partial through holes of the anchoring mounting plate 3.1.
As shown in fig. 7, web stiffener plates 4.6 are welded and fixed to the opposing surfaces of the two second side plates 4.5 and the surface of the web plate 4.1, that is, the web stiffener plates 4.6 are disposed in the fully enclosed space, and the web stiffener plates 4.6 are only welded and fixed to the web plate 4.1 or the second side plates 4.5.
As shown in fig. 5 and 6, the steel plate strip connector 4 further comprises a fastener comprising a first connector bolt 4.7 and a second connector bolt 4.8. The connecting cover 4.9 is spaced apart from the wing 4.2 to form a clamping channel in which a part of the first connecting piece 1.1 of the steel strip 1 is arranged. When the holding channel is not filled with the first connecting part 1.1, a filling plate 4.10 is also arranged in the holding channel. The filler plate 4.10 may partly protrude beyond the clamping channel. The filler plate 4.10 is welded and fixed with the wing plate 4.2. The first connecting bolt 4.7 connects and fixes the connecting cover plate 4.9, the first connecting piece 1.1 and the wing plate 4.2 in sequence, wherein the wing plate 4.2 is provided with a threaded hole 4.11 for the first connecting bolt 4.7 to pass through. The second connecting bolt 4.8 connects and fixes the connecting cover plate 4.9, the filling plate 4.10 and the wing plate 4.2 in sequence.
The connecting cover plate 4.9 can disperse the force exerted on the wing plate 4.2 by the first connecting piece 1.1 of the steel plate strip 1 through the first connecting bolt 4.7, and can limit the axial jumping or the movement of the first connecting piece 1.1 along the first connecting bolt 4.7, so that the connecting effect of the first connecting piece 1.1 and the wing plate 4.2 is better. The filling plate 4.10 can not only limit the extension displacement of the first connecting piece 1.1 along the length direction thereof, but also absorb the radial extrusion force applied to the first connecting bolt 4.7, so that the first connecting piece 1.1 and the wing plate 4.2 are reliably connected.
As shown in fig. 3 to 5, the first anti-pulling part 5 includes a first anti-pulling steel plate 5.1, an anti-pulling end plate 5.2 and a first anti-pulling stud 5.3, the first anti-pulling steel plate 5.1 is welded and fixed with the second bottom plate 4.4, the first anti-pulling steel plate 5.1 is perpendicular to the second bottom plate 4.4, the anti-pulling end plate 5.2 is welded at the bottom of the first anti-pulling steel plate 5.1, the first anti-pulling steel plate 5.1 is vertically arranged, two rows of horizontal first anti-pulling studs 5.3 are vertically arranged on the first anti-pulling steel plate 5.1, and the first anti-pulling studs 5.3 are perpendicular to the first anti-pulling steel plate 5.1. In this embodiment, the second bottom plate 4.4 is provided with a plurality of first anti-pulling members 5 in an array. The second bottom plate 4.4 is provided with a plurality of positioning grooves 4.4.1 in an array manner, and the top of the first anti-pulling steel plate 5.1 penetrates through the positioning grooves 4.4.1 and then is welded and fixed with the second bottom plate 4.4. Through the effect of constant head tank 4.4.1, can monitor the mounted position of second bottom plate 4.4 and first resistance to plucking steel sheet 5.1 to guarantee the installation accuracy of steel sheet strip connecting piece 4, make conversion connecting device atress balanced.
The second anti-pulling piece 6 comprises a second anti-pulling steel plate 6.1 and a second anti-pulling bolt nail 6.2, the second anti-pulling steel plate 6.1 is vertically arranged, the second anti-pulling steel plate 6.1 is welded on the opening end, far away from the anchoring installation plate 3.1, of the semi-closed space of the steel plate strip connecting piece 4, and the second anti-pulling steel plate 6.1 seals the semi-closed space into a fully-closed space. The second anti-pulling pegs 6.2 are arranged perpendicular to the second anti-pulling steel plate 6.1, and two rows of the second anti-pulling pegs 6.2 are also arranged on the second anti-pulling steel plate 6.1. The second anti-extraction peg 6.2 is connected to the abutment 7. Through second resistance to plucking steel sheet 6.1 not only can improve the bulk rigidity of steel sheet area connecting piece 4, under the effect of second resistance to plucking peg 6.2, steel sheet area connecting piece 4 can with the abutment 7 stable connection of suspension bridge, especially when steel plate band 1 certain degree of deflection or vibration appear under the load effect, but the influence of second resistance to plucking piece 6 and abutment 7 effective connection greatly reduced steel plate band 1 degree of deflection or vibration to anchor rope device 2.
The material of the conversion connecting device of the embodiment is Q420C or Q460C, the ultimate tensile strength is 490-675MPa, and the elastic modulus is 2.06 × 105MPa, Poisson's ratio of 0.3, density of 7850kg/m 3. Finite element analysis and calculation are carried out on the conversion connecting device of the embodiment by using Midas FEA (v3.6.0) finite element analysis software and combining relevant specifications such as steel structure design specification and the like, a linear elastic model is established, wherein the yield criterion in the analysis is von Mises yield criterion, the boundary condition is set to be rigid connection, 12000kN of tensile force is applied along the horizontal direction of the steel plate strip 1 of the suspension bridge, the stress calculation result of the conversion connecting device is shown in figure 14, the maximum Mises equivalent stress of the conversion connecting device is 125.5MPa, namely an area A in figure 14, and as the yield strength of the conversion connecting device made of Q420C material is 420MPa and the maximum Mises equivalent stress of the conversion connecting device is smaller than the yield strength, the structure of the conversion connecting device meets the requirements.
Similarly, when a tension of 12000kN is applied along the horizontal direction of the steel plate strip 1 of the suspension bridge, the displacement calculation result of the conversion connecting device is shown in fig. 15, the displacement value of the conversion connecting device is gradually increased from bottom to top, and the maximum displacement value of 1.958mm is positioned at the wing plate 4.2. For the convenience of understanding, in the present embodiment, the displacement values corresponding to the shifting connection device under the load in fig. 15 are divided into B, C, D, E and F regions, and the deformation amount of the shifting connection device gradually increases in the order of B, C, D, E, F, wherein the region corresponding to F is the place of the wing plate 4.2. Since the displacement values corresponding to all regions of the conversion connection device including the wing 4.2 are small, the deformation of the conversion connection device is within a reasonable deformation range.
In the embodiment, the steel plate suspension bridge is arranged in a mountain body and used as a landscape suspension bridge. The construction method of the steel plate strip suspension bridge comprises the following steps:
And 5, in the process of assembling the conversion connecting device in the step 4, the construction step of connecting the anchor connecting piece 3 with the anchor cable device 2 is further included. Specifically, the anchor cable device 2 penetrates through the limiting hole 3.2.1 and then is connected with the anchoring mounting plate 3.1, and then the anchor cable device 2 is sequentially and independently tensioned from bottom to top and from inside to outside according to the numbering sequence of 1 to 24 shown in fig. 13, the specific tensioning construction embodiment of the anchor cable device 2 is not specifically limited, and the construction of the anchor cable device 2 is carried out according to the corresponding construction standard. After the anchor cable device 2 is constructed, welding construction of the second top plate 4.3 is carried out, and the wing plate 4.2, the second top plate 4.3, the anchoring mounting plate 3.1, the second bottom plate 4.4, the second side plate 4.5 and the second anti-pulling steel plate 6.1 are surrounded to form a fully-closed space.
And 6, in the process of assembling the conversion connecting device in the step 4, connecting the steel plate strip connecting piece 4 with the end part of the steel plate strip 1. The method specifically comprises the following steps: the position of the steel plate strip 1 is adjusted to enable the first connecting piece 1.1 to be located in a clamping channel between the connecting cover plate 4.9 and the wing plate 4.2, or after the steel plate strip 1 is hoisted, the first connecting piece 1.1 is hoisted to the wing plate 4.2, then the connecting cover plate 4.9 is installed to form the clamping channel, and the first connecting piece 1.1 is located in the clamping channel. The filling plate 4.10 is arranged in the clamping channel, and the connecting cover plate 4.9, the first connecting piece 1.1 and the wing plate 4.2 are sequentially connected and fixed through the first connecting bolt 4.7. The connecting cover plate 4.9, the filling plate 4.10 and the wing plate 4.2 are sequentially connected and fixed through the second connecting bolt 4.8, and the filling plate 4.10 and the wing plate 4.2 are welded and fixed.
Step 7, constructing a bridge deck: a layer of rubber pad 12 is laid on the steel plate strip 1, a concrete precast slab 19 is laid on the rubber pad 12 to serve as a bridge deck, and the concrete precast slab 19, the rubber pad 12 and the steel plate strip 1 are fixedly connected through mounting bolts 13.
And 8, installing the handrails 14 on two sides of the concrete prefabricated plates 19, and installing the handrails 15 on the handrails 14, wherein the handrails 15 can also be prefabricated on the handrails 14 when the handrails 14 leave a factory.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that belong to the idea of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (8)
1. A steel plate suspension bridge, comprising:
a bridge body; the bridge body comprises at least one steel plate strip; and
the two conversion connecting devices are respectively arranged at two ends of the bridge body, each conversion connecting device comprises an anchoring connecting piece and a steel plate belt connecting piece, the anchoring connecting pieces are connected with the anchor cable devices, and the steel plate belt connecting pieces are connected with the end parts of the steel plate belts;
the anchor connecting piece comprises an anchor mounting plate, and the anchor mounting plate is used for being connected with the anchor cable device;
the steel plate strip connecting piece comprises a web plate and a wing plate, the web plate is connected with the anchoring mounting plate, the web plate is connected with the wing plate, and the wing plate is used for being connected with the end part of the steel plate strip;
the steel plate strip connector further comprises:
the connecting cover plate is arranged at a distance from the wing plate;
the filling plate is arranged between the connecting cover plate and the wing plate; and
and the fastening piece is connected with the connecting cover plate and the wing plate and is used for fixing the end part of the steel plate strip between the connecting cover plate and the wing plate.
2. The steel plate strip suspension bridge of claim 1, wherein the bridge body further comprises two first connectors connected to both ends of the steel plate strip, respectively, and the steel plate strip connector of each conversion connection device is connected to one first connector.
3. The steel plate strip suspension bridge of claim 2, wherein the bridge body further comprises a concrete precast slab disposed on an upper surface of the steel plate strip.
4. The steel plate suspension bridge according to claim 2, wherein the number of the steel plate strips is at least two, each steel plate strip extends along the span direction of the bridge body, and a gap is formed between at least two steel plate strips.
5. The steel plate strip suspension bridge of claim 1, wherein the material of the steel plate strip is Q690D steel.
6. The steel plate strip suspension bridge of claim 1, wherein the anchor connection further comprises:
the anchoring stiffening plate is connected with the anchoring mounting plate; and
the anchoring limiting plate corresponds the setting with the anchoring mounting panel, the anchoring limiting plate with the anchoring stiffening plate is connected, be provided with spacing hole on the anchoring limiting plate, be provided with on the anchoring mounting panel and wear to establish the hole, spacing hole with wear to establish the corresponding setting of hole.
7. The steel strip suspension bridge of claim 1, wherein each conversion connection further comprises a first anti-pull member disposed on the anchor connection and/or the steel strip connection, and/or a second anti-pull member disposed on the steel strip connection.
8. The construction method of the steel plate suspension bridge is characterized by comprising the following steps:
step 1, constructing a bridge body: laying or hoisting steel plate strips along the span direction of the bridge body to be constructed, and constructing anchor cable devices on two sides of the bridge body to be constructed;
step 2, assembling two conversion connecting devices: connecting and fixing the anchor connecting piece and the steel plate strip connecting piece of each conversion connecting device;
step 3, connecting the steel plate belt connecting piece with the end part of the steel plate belt, and connecting the anchoring connecting piece with the anchor cable device;
wherein the anchor connector comprises an anchor mounting plate connecting the anchor mounting plate with the anchor cable device;
the steel plate strip connecting piece comprises a web plate, a wing plate, a connecting cover plate, a filling plate and a fastener, wherein the web plate is connected with the anchoring mounting plate, the web plate is connected with the wing plate, and the wing plate is connected with the end part of the steel plate strip; arranging the connecting cover plate and the wing plate at a distance; disposing the filler plate between the connecting cover plate and the wing plate; and connecting a fastener with the connecting cover plate and the wing plate, wherein the fastener is used for fixing the end part of the steel plate strip between the connecting cover plate and the wing plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110634490.0A CN113389134B (en) | 2021-06-07 | 2021-06-07 | Steel plate strip suspension bridge and construction method thereof |
| PCT/CN2022/107546 WO2022258080A1 (en) | 2021-06-07 | 2022-07-22 | Steel plate belt suspension bridge and construction method therefor |
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| CN202110634490.0A CN113389134B (en) | 2021-06-07 | 2021-06-07 | Steel plate strip suspension bridge and construction method thereof |
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| CN113389134B (en) * | 2021-06-07 | 2022-06-07 | 中建三局第一建设工程有限责任公司 | Steel plate strip suspension bridge and construction method thereof |
| CN114775403B (en) * | 2022-03-16 | 2024-02-06 | 林同棪国际工程咨询（中国）有限公司 | Carbon fiber plate suspension bridge |
| CN114855586B (en) * | 2022-04-30 | 2023-07-14 | 中建三局第一建设工程有限责任公司 | Steel plate belt suspension bridge structure, line shape determining method of construction jig frame and construction method |
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| DE3823964A1 (en) * | 1988-07-15 | 1990-02-22 | Bilfinger Berger Vorspanntech | METHOD FOR RENEWING THE CORROSION PROTECTION OF TENSION LINES OF BRIDGES AND SIMILAR TENSIONED CONSTRUCTIONS, AND DEVICE FOR IMPLEMENTING THE METHOD |
| GB2415005B (en) * | 2004-06-08 | 2006-05-03 | Thomas John Upstone | Suspension bridge cables |
| CN100503977C (en) * | 2007-03-21 | 2009-06-24 | 浙江省舟山连岛工程建设指挥部 | Tower column of stayed-cable bridge and its construction method |
| CN102912721B (en) * | 2012-11-21 | 2014-11-12 | 中铁第四勘察设计院集团有限公司 | Double-outrigger type cable beam anchoring structure of bridge steel box girder |
| CN209669675U (en) * | 2019-02-22 | 2019-11-22 | 深圳市市政设计研究院有限公司福建分公司 | A kind of semi-rigid sling arch bridge |
| CN112832144B (en) * | 2021-01-08 | 2021-12-07 | 重庆交通大学工程设计研究院有限公司 | Pedestrian suspension bridge reinforcing structure and construction process thereof |
| CN113389134B (en) * | 2021-06-07 | 2022-06-07 | 中建三局第一建设工程有限责任公司 | Steel plate strip suspension bridge and construction method thereof |
| CN113389141B (en) * | 2021-06-07 | 2022-06-07 | 中建三局第一建设工程有限责任公司 | Conversion connecting device and construction method thereof |
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