CN216663756U - Fully-prefabricated pedestrian cable-stayed bridge - Google Patents

Abstract

The utility model discloses a fully-prefabricated pedestrian cable-stayed bridge, which comprises a main tower, a stay cable, a main tower foundation, a main beam, a main tower cross beam, a bridge abutment foundation, a bridge abutment pier body, a bridge abutment cover beam and a bridge deck; the main tower is erected in the direction of the transverse bridge, and the stay cables are respectively connected with the main tower and the main beam; the two ends of the main tower cross beam are connected to the two sides in the main tower, and the abutment foundation, the abutment pier body and the abutment cover beam are sequentially spliced and connected and are positioned at the lower part of the main beam; the bridge deck is connected with the main beam and is positioned on the upper part of the main beam; the main tower foundation is connected with the bottom of the main tower. The bridge structure provided by the utility model can be quickly put into use after being built, good social benefits are generated, and the construction cost and the later maintenance cost are lower; the bridge structure provides a novel structural form for bridge designers.

Description

Fully-prefabricated pedestrian cable-stayed bridge

Technical Field

The utility model relates to the technical field of bridge structure buildings, in particular to a fully-prefabricated pedestrian cable-stayed bridge.

Background

With the development of bridge technology, cable-stayed bridges are more and more widely applied due to novel and attractive structure and larger spanning capability. The urban landscape pedestrian cable-stayed bridge is more and more paid attention and preferred by people, and because the urban landscape pedestrian cable-stayed bridge meets the requirement of pedestrian passing, the urban landscape pedestrian cable-stayed bridge has a better landscape effect and is a beautiful landscape line in cities.

The conventional cast-in-place construction period of the concrete cable-stayed bridge is long, the urban environment is seriously influenced by pollution such as construction dust and noise, the site is occupied by cast-in-place construction in a large quantity, traffic is seriously hindered, and the peripheral traffic safety and the convenience of resident trip are influenced. Although the common steel structure cable-stayed bridge can also realize the prefabricated and hoisted steel tower and steel beam, the construction cost and the later maintenance cost of the steel structure are higher than those of a concrete structure.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model discloses and provides a fully-prefabricated pedestrian cable-stayed bridge, which is based on an assembly prefabricated structure, adopts a concrete fully-prefabricated bridge design, and can realize the requirements of rapid construction, small traffic influence, energy conservation and environmental protection.

The technical scheme provided by the utility model is that the fully-prefabricated pedestrian cable-stayed bridge comprises a main tower, a stay cable, a main tower foundation, a main beam, a main tower cross beam, an abutment foundation, an abutment pier body, an abutment cover beam and a bridge deck; the main tower is erected in the direction of the transverse bridge, and the stay cables are respectively connected with the main tower and the main beam; the bridge abutment foundation, the bridge abutment pier body and the bridge abutment cover beam are sequentially spliced and connected and are positioned at the lower part of the main beam; the bridge deck is connected with the main beam and is positioned on the upper part of the main beam; the main tower foundation is connected with the bottom of the main tower;

the main tower is formed by splicing a plurality of first single concrete members, and the first single concrete members of the adjacent upper and lower layers in the main tower structure are connected through shear keys, adhesive joints, segmented thread steel bars and prestressed steel strands;

the main tower cross beam is of a first whole prefabricated part structure, and the main tower cross beam and the main tower are connected by adopting a glue joint and a prestressed steel strand;

the main beam comprises longitudinal beams and cross beams, the longitudinal beams are formed by connecting a plurality of second single concrete components, the second single concrete components are symmetrically arranged on two sides of the main tower one by one, the cross beams are of a second whole prefabricated component structure, and two ends of each cross beam are respectively connected to the longitudinal beams on two sides;

the abutment foundation, the abutment body and the abutment bent cap adopt a third integral prefabricated component structure;

the bridge deck is of a precast concrete plate structure;

and the main tower foundation adopts a third single concrete member structure.

Furthermore, a steel strand pore channel and a high-strength finish-rolled twisted steel pore channel are pre-embedded in the first single concrete member, a shear key is arranged on the end surface of the lower layer first single concrete member, and a shear groove is arranged on the end surface of the upper layer first single concrete member correspondingly connected with the shear key; still be equipped with the viscose layer between the terminal surface of upper and lower floor's monolithic concrete component, run through in the steel strand wires pore and be equipped with prestressed steel strand wires, be equipped with segmentation twisted steel in the high-strength finish rolling twisted steel pore.

Furthermore, the adhesive layer is an epoxy resin adhesive layer.

Furthermore, a steel strand pore channel is pre-embedded in the main tower cross beam, and the pre-stressed steel strands penetrate through the steel strand pore channel, so that pre-stressed connection between the main tower cross beam and the main tower is realized.

Furthermore, a grouting sleeve, a first connecting rib and a steel strand pore channel are pre-embedded in the second single concrete component; the grouting sleeves are distributed at one end and the inner side of the second single concrete member, the grouting sleeve at one end is connected with the first connecting rib, and the plurality of second single concrete members are inserted into the grouting sleeve at one end through the first connecting rib to be connected, so that the longitudinal beam is formed; prestressed steel strands are preset in the steel strand pore channels;

and a connecting rib is reserved in the second whole prefabricated part and inserted into the embedded grouting sleeve on the inner side, so that the connection between the cross beam and the longitudinal beam is realized.

Furthermore, the abutment foundation, the abutment pier body and the abutment cover beam are connected by grouting steel sleeves;

grout sleeve has been prefabricated in abutment basis and the abutment bent cap, has main muscle in the abutment pier body of reservation, main muscle inserts in the grout sleeve, realizes the connection between abutment basis, abutment pier body, abutment bent cap.

Further, bridge deck plates connected by anchor bolts, wherein the distance between the anchor bolts is 1 m; and anchor bolt holes are formed in the longitudinal beam (5) and the transverse beam (6), and asphalt cement is added into gaps of the anchor bolt holes.

Further, the thickness of the middle of the bridge deck is 20cm, and the thickness of the end part of the bridge deck is 30 cm; the bridge deck slab is provided with a wood-plastic plate layer, wood-plastic plate mounting embedded parts are embedded in the bridge deck slab, elastic rubber sealing rings are arranged between slab joints of the bridge deck slab, and caulking sealant is arranged on the top of the slab joints.

Further, the third single concrete member structure is specifically: two concrete components are arranged in the transverse bridge direction and connected through a concrete cast-in-place belt, and a high-strength finish rolling threaded steel bar is embedded in the main tower foundation and connected with the bottom of the main tower through the high-strength finish rolling threaded steel bar.

Further, the length of the first single concrete component and the length of the second single concrete component are 5-6 m.

The fully-prefabricated pedestrian cable-stayed bridge provided by the utility model is suitable for serving as an urban river-crossing bridge and can also serve as a landscape pedestrian bridge for urban road crossing. Compare in traditional cast in situ concrete cable-stay bridge, the full precast cable-stay bridge of this structure has: the construction is green and environment-friendly, the construction period is short, a large amount of manpower and material resources are saved, construction waste is reduced, the influence of the construction on the site environment is reduced, meanwhile, the influence on peripheral traffic is reduced, and the like.

The structural members related to the utility model are all prefabricated concrete members, so that all prefabrication in factories can be realized, and the construction standard and quality of factory construction are easier to control. The bridge structure provided by the utility model provides a novel structural form for bridge designers.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic elevation structure view of a fully-prefabricated pedestrian cable-stayed bridge according to the disclosed embodiment of the utility model;

FIG. 2 is a schematic structural diagram of a main tower of a fully-prefabricated pedestrian cable-stayed bridge according to the embodiment of the disclosure;

FIG. 3 is a cross-sectional view of a joint of a first concrete member in a main tower of a fully-prefabricated pedestrian cable-stayed bridge according to the embodiment of the disclosure;

FIG. 4 is a schematic structural view of a main beam of a fully-prefabricated pedestrian cable-stayed bridge according to the embodiment of the disclosure;

FIG. 5 is a schematic connection diagram of a main beam structure of a fully-prefabricated pedestrian cable-stayed bridge according to the disclosed embodiment of the utility model;

fig. 6 is a schematic view of a connection structure of an abutment pier body, an abutment capping beam and an abutment foundation in the fully-prefabricated pedestrian cable-stayed bridge according to the embodiment of the disclosure;

fig. 7 is a schematic view of a connection structure of a bridge deck in a fully-prefabricated pedestrian cable-stayed bridge according to the embodiment of the disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of systems consistent with certain aspects of the utility model, as detailed in the appended claims.

In the prior art, a prefabricated bridge structure is mostly used for a conventional beam type bridge, and for a concrete cable-stayed bridge structure, although some main beams adopt segmental prefabricated parts when cantilever pouring is needed, a cast-in-place structure is mainly used basically. Still have many drawbacks, provide a full prefabrication construction cable-stay bridge structure for this embodiment. In the embodiment, the transverse bridge direction refers to the direction perpendicular to the central axis of the bridge, and the forward bridge direction refers to the central axis direction of the bridge;

as shown in fig. 1-2, a fully prefabricated pedestrian cable-stayed bridge comprises a main tower 1, a stay cable 2, a main tower foundation 3, a main beam 4, a main tower cross beam 7, an abutment foundation 8, an abutment pier body 9, an abutment cover beam 10 and a bridge deck 11; the main tower 1 is erected in the direction of a transverse bridge, and the inhaul cable 2 is respectively connected with the main tower 1 and the main beam 4; the two ends of a main tower beam 7 are connected to the two sides in the main tower 1, and an abutment foundation 8, an abutment pier body 9 and an abutment cover beam 10 are sequentially spliced and connected and are positioned at the lower part of the main beam 4; the bridge deck 11 is connected with the main beam 4 and is positioned on the upper part of the main beam 4; the main tower foundation 3 is connected with the bottom of the main tower 1;

the main tower 1 is formed by splicing a plurality of first single-block concrete members, and comprises a block A, a block B, a block C, a block D, a block E and a block F as shown in figure 2; the first single concrete members of the adjacent upper and lower layers in the main tower structure are connected through shear keys, glue joints, segmented thread steel bars and prestressed steel strands;

the method can be specifically realized as follows: as shown in fig. 3, a steel strand duct 13 and a high-strength finish-rolled twisted steel bar duct 14 are pre-embedded in the first single concrete member, a shear key 12 is arranged on the end surface of the lower first single concrete member, and a shear groove is arranged on the end surface of the upper first single concrete member correspondingly connected with the shear key 12; and a viscose layer is also arranged between the end surfaces of the upper and lower single concrete members, prestressed steel strands penetrate through the steel strand pore channels 13, and segmented twisted steel bars are arranged in the high-strength finish-rolled twisted steel bar pore channels 14.

The adhesive layer may preferably be an epoxy adhesive layer.

The main tower foundation 3 adopts a third single concrete member structure.

As shown in fig. 2, the third single concrete member structure is specifically: two concrete components are arranged in the transverse bridge direction and connected through a concrete cast-in-place belt 17, and a main tower foundation 3 is pre-embedded with a high-strength finish rolling threaded steel bar 16 and connected with the bottom of the main tower 1 through the high-strength finish rolling threaded steel bar 16.

During construction, a main tower expanded foundation is prefabricated in a factory in a block mode, a single main tower foundation 3 is divided into two transverse bridge directions, later-stage transverse connection main reinforcements are reserved in a single block structure, the main reinforcements are connected through a concrete cast-in-place section on site, main reinforcements of the cast-in-place section and single embedded main reinforcements are welded, stirrups, construction reinforcements and the like are arranged in the cast-in-place section, meanwhile, the contact surface needs to be roughened, and high-strength fine rolled thread reinforcements are embedded in the prefabricated foundation and the cast-in-place section in order to be connected with the main tower.

The cross section of the main tower 1 is a full section of the main tower, the length of the main tower is 5-6 m, the anchoring structure is prefabricated at the same time, shear keys are arranged on the lower block surface and shear grooves are formed in the upper block surface at joints among single concrete components. When a single concrete component is prefabricated, a steel strand pore channel and a high-strength finish-rolled threaded steel bar pore channel are pre-embedded, the main tower is spliced from bottom to top, and after the lowest section is hoisted, the main tower is connected with a foundation through a high-strength finish-rolled threaded steel bar 16. And (3) hoisting and installing section by section, namely adopting the form of epoxy resin adhesive bonding, shear key and temporary connection for the single concrete member joint in the main tower, and tensioning the full-length prestressed steel strand after all sections are finished to finish the construction of the main tower 1.

As shown in fig. 4 and 5, the main tower cross beam 7 adopts a first monolithic prefabricated part structure, and the main tower cross beam 7 and the main tower 1 are connected by using a glue joint and a prestressed steel strand; specifically, a steel strand pore channel is pre-embedded in the main tower cross beam 7, and the pre-stressed steel strands penetrate through the steel strand pore channel, so that pre-stressed connection between the main tower cross beam 7 and the main tower 1 is realized.

The main beam 4 in the cable-stayed bridge comprises a longitudinal beam 5 and a cross beam 6; the longitudinal beam 5 is formed by connecting a plurality of second single concrete members, and the second single concrete members are symmetrically arranged on two sides of the main tower 1 one by one; a grouting sleeve 15, a first connecting rib and a corrugated pipe pore channel are pre-embedded in the second single concrete component; the grouting sleeves 15 are distributed at one end and the inner side of the second single concrete member, the grouting sleeve at one end is connected with the first connecting rib, and the plurality of second single concrete members are inserted into the grouting sleeve at one end through the first connecting rib to realize connection, so that the longitudinal beam 5 is formed; prestressed steel strands 18 are preset in the steel strand pore channels;

the cross beam 6 adopts a second whole prefabricated part structure, and two ends of the cross beam 6 are respectively connected to the longitudinal beams 5 on two sides; a connecting rib is reserved in the second whole prefabricated part and inserted into the embedded grouting sleeve on the inner side, and the cross beam 6 is connected with the longitudinal beam 5.

The girder 4 in this embodiment adopts girder longeron 5 and girder crossbeam 6 integrated configuration, and during the construction, the crossbeam is whole prefabricated, and the longeron segmentation is prefabricated, and about 6m of every section length, pre-buried grout sleeve and reservation joint bar during prefabrication, longeron pre-buried bellows pore simultaneously. The longitudinal girder longitudinal beams 5 and the girder transverse beams 6 are symmetrically arranged on two sides of the main tower section by section, and the construction process of the girder support can be reduced by adopting the structure in the construction process by a method of stretching the stay cable. When the cross beam 6 is connected with the longitudinal beam 5, the connecting ribs reserved on the cross beam 6 are directly inserted into the grouting sleeves of the longitudinal beam, the longitudinal beam 5 is also connected by the same method, and after the longitudinal and transverse beams of the main beam are completely assembled, the prestress of the longitudinal beam is tensioned, so that the main beam 4 is assembled.

The abutment foundation 8, the abutment pier body 9 and the abutment bent cap 10 adopt a third integral prefabricated component structure; the abutment foundation 8, the abutment pier body 9 and the abutment bent cap 10 are connected by grouting steel sleeves;

specifically, as shown in fig. 6, grouting sleeves are prefabricated in the abutment foundation 8 and the abutment capping beam 10, main ribs are reserved in the abutment pier body 9, and the main ribs are inserted into the grouting sleeves to realize connection among the abutment foundation 8, the abutment pier body 9, and the abutment capping beam 10. During construction, the abutment pier body 9, the abutment foundation 8 and the abutment bent cap 10 are connected in a grouting steel sleeve connection mode, a steel sleeve positioning plate is installed when the abutment foundation 8 and the abutment bent cap 10 are prefabricated, a steel sleeve is accurately embedded, and a main connecting rib is reserved in the abutment pier body 9.

As shown in fig. 7, the bridge deck 11 is of a precast concrete plate structure; the bridge deck 11 is made of precast concrete plates and is connected with the longitudinal and transverse beams of the main beam through anchor bolts 19, the distance between the anchor bolts 19 is 1m, and asphalt cement is added into gaps of anchor bolt holes. The standard thickness of the deck slab 11 is 20cm, thickened at the ends to 30 cm. Pre-buried built-in fitting that wood-plastic board needs when 11 prefabricated bridge deck boards set up elastic rubber seal circle between the board seam, and the seam top sets up the sealed glue of caulking and prevents water, and prefabricated bridge deck board is accomplished the back, and the board is laid into the finished product wood-plastic board.

This embodiment provides the structure that relates to in the full prefabricated pedestrian cable-stay bridge all adopts the concrete member. The main tower and the main beam are prefabricated in a factory in a block mode, steel strand pre-embedded ducts are reserved, steel strands penetrate in the main tower and the main beam during field assembly, and steel strand tensioning is carried out after the assembly is completed. The main tower foundation is prefabricated in a factory in blocks, the main tower foundation is connected through a concrete cast-in-place section on site, and the foundation is embedded with high-strength finish-rolled thread steel bars connected with the main tower. The main beam adopts the structure of vertical and horizontal beam, the mill carries out the segmentation prefabrication, reserves reinforcing bar and inserts the pore, and the on-the-spot girder structure of assembling becomes. When the main beam is constructed, longitudinal beams can be installed from the main tower to two sides section by section, and the construction process of the main beam support can be reduced by a method of tensioning the stay cables. The deck slab adopts precast concrete board, is connected through the horizontal and vertical beams of crab-bolt and girder, assembles the bridge floor system of completion, beautifully reaches the comfort that the pedestrian used for the bridge, lays finished product wood-plastic panel on the deck slab, welds metal railing on the pre-buried steel sheet of deck slab top surface at last, accomplishes the construction of full-bridge. The cable-stayed bridge structure provided by the embodiment has the characteristics of green and environment-friendly construction, short construction period, advanced and feasible technology and the like.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It will be understood that the utility model is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims (10)

1. A fully-prefabricated pedestrian cable-stayed bridge is characterized by comprising a main tower (1), a stay cable (2), a main tower foundation (3), a main beam (4), a main tower cross beam (7), an abutment foundation (8), an abutment pier body (9), an abutment cover beam (10) and a bridge deck (11); the main tower (1) is erected in the direction of a transverse bridge, and the inhaul cable (2) is connected with the main tower (1) and the main beam (4) respectively; two ends of the main tower cross beam (7) are connected to two sides in the main tower (1), and the abutment foundation (8), the abutment pier body (9) and the abutment cover beam (10) are sequentially spliced and connected and are positioned at the lower part of the main beam (4); the bridge deck (11) is connected with the main beam (4) and is positioned on the upper part of the main beam (4); the main tower foundation (3) is connected with the bottom of the main tower (1);

the main tower (1) is formed by splicing a plurality of first single concrete members, and the first single concrete members of adjacent upper and lower layers in the main tower structure are connected through shear keys, adhesive joints, segmented thread steel bars and prestressed steel strands;

the main tower cross beam (7) is of a first whole prefabricated part structure, and the main tower cross beam (7) and the main tower (1) are connected through a glue joint and a prestressed steel strand;

the main beam (4) comprises longitudinal beams (5) and cross beams (6), the longitudinal beams (5) are formed by connecting a plurality of second single concrete components, the second single concrete components are symmetrically arranged on two sides of the main tower (1) one by one, the cross beams (6) are of a second whole prefabricated component structure, and two ends of each cross beam (6) are respectively connected to the longitudinal beams (5) on two sides;

the abutment foundation (8), the abutment body (9) and the abutment cover beam (10) adopt a third integral prefabricated component structure;

the bridge deck (11) adopts a precast concrete plate structure;

the main tower foundation (3) adopts a third single concrete member structure.

2. The fully-prefabricated pedestrian cable-stayed bridge according to claim 1, wherein the first single concrete member is pre-embedded with a steel strand hole (13) and a high-strength finish-rolled twisted steel bar hole (14), the end surface of the lower first single concrete member is provided with a shear key (12), and the end surface of the upper first single concrete member correspondingly connected with the shear key is provided with a shear groove; still be equipped with the viscose layer between the terminal surface of upper and lower floor's monolithic concrete component, run through in steel strand wires pore (13) and be equipped with the prestressing force steel strand wires, be equipped with segmentation twisted steel in the high-strength finish rolling twisted steel pore (14).

3. The fully prefabricated pedestrian cable-stayed bridge according to claim 2, wherein the adhesive layer is an epoxy resin adhesive layer.

4. The fully-prefabricated pedestrian cable-stayed bridge according to claim 1, wherein steel strand channels are pre-embedded in the main tower cross beam (7), and the prestressed steel strands penetrate through the steel strand channels to realize the prestressed connection between the main tower cross beam (7) and the main tower (1).

5. The fully-prefabricated pedestrian cable-stayed bridge according to claim 1, wherein a grouting sleeve (15), a first connecting rib and a steel strand hole are embedded in the second single concrete member; the grouting sleeves (15) are distributed at one end and the inner side of the second single concrete member, the grouting sleeve at one end is connected with the first connecting rib, and the plurality of second single concrete members are inserted into the grouting sleeve at one end through the first connecting rib to realize connection, so that the longitudinal beam (5) is formed; prestressed steel strands are preset in the steel strand pore channels;

a connecting rib is reserved in the second whole prefabricated part and inserted into the embedded grouting sleeve on the inner side, and the cross beam (6) is connected with the longitudinal beam (5).

6. The fully-prefabricated pedestrian cable-stayed bridge according to claim 1, characterized in that the abutment foundation (8), the abutment pier body (9) and the abutment capping beam (10) are connected by grouting steel sleeves;

grout sleeve has been prefabricated in abutment basis (8) and abutment bent cap (10), has main muscle in abutment pier body (9) in advance, during grout sleeve was inserted to main muscle, the connection between abutment basis (8), abutment pier body (9), abutment bent cap (10) was realized.

7. A fully prefabricated pedestrian cable-stayed bridge according to claim 1, characterized by bridge deck panels (11) connected by anchor bolts with an anchor bolt spacing of 1 m; and anchor bolt holes are formed in the longitudinal beam (5) and the transverse beam (6), and asphalt cement is added into gaps of the anchor bolt holes.

8. A fully prefabricated pedestrian cable-stayed bridge according to claim 1, characterized in that the thickness of the middle of the bridge deck (11) is 20cm and the thickness of the end of the bridge deck (11) is 30 cm; install wood-plastic board layer on decking (11), pre-buried wood-plastic board installation built-in fitting in decking (11), set up elastic rubber seal circle between decking (11) board seam, set up the caulking sealant on the board seam top.

9. The fully-prefabricated pedestrian cable-stayed bridge according to claim 1, wherein the third single-concrete member structure specifically comprises: two concrete components are arranged in the transverse bridge direction and connected through a concrete cast-in-place belt (17), and a high-strength finish rolling threaded steel bar (16) is pre-embedded in the main tower foundation (3) and connected with the bottom of the main tower (1) through the high-strength finish rolling threaded steel bar (16).

10. The fully prefabricated pedestrian cable-stayed bridge according to claim 1, wherein the length of the first single concrete member and the length of the second single concrete member are 5-6 m.

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