CN209779429U - Landscape walking bridge applying cable tower structure - Google Patents

Landscape walking bridge applying cable tower structure Download PDF

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Publication number
CN209779429U
CN209779429U CN201920112226.9U CN201920112226U CN209779429U CN 209779429 U CN209779429 U CN 209779429U CN 201920112226 U CN201920112226 U CN 201920112226U CN 209779429 U CN209779429 U CN 209779429U
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China
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steel
bridge
cable tower
cable
box girder
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谈翔
严绕军
严建军
金光华
潘煊吉
郑明浩
姚力
郑耀洲
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Shanghai Greenbelt Construction (group) Co Ltd
Shanghai Greenland Construction Group Co Ltd
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Shanghai Greenbelt Construction (group) Co Ltd
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Abstract

The utility model relates to a landscape walking bridge applying a cable tower structure, which comprises a bridge deck steel box girder, a cable tower steel structure and steel cables and is characterized in that the whole bridge deck steel box girder adopts an arc plane structure, and the bottoms of the two ends of the bridge deck steel box girder are respectively provided with a bridge abutment foundation and a bridge pier foundation and are fixed by embedded parts; the bridge deck steel box girder is transversely not segmented along the cross section direction, is longitudinally divided into 3 sections of a north side span, a middle span and a south side span along the length direction, two adjacent sections of side spans are fixed through butt joints, two groups of cable tower steel structures are erected on each section of side span at equal intervals, and a steel cable is respectively pulled on the left and right of each group of cable tower steel structures. The utility model relates to an use view walking bridge of cable tower structure, structural design is slim and graceful, clean and tidy, pleasing to the eye.

Description

Landscape walking bridge applying cable tower structure
[ technical field ]
The utility model relates to a walking bridge construction technical field, specific view walking bridge of using cable tower structure that says so.
[ background art ]
In recent years, the public foundation engineering construction of China is developed rapidly, due to different terrain conditions, bridges, particularly suspension bridges are built and used more and more, the span of road bridges can be greatly increased, the engineering investment is saved, the economic benefit is very obvious, and the method is widely applied to actual engineering.
[ summary of the invention ]
The utility model aims to improve on prior art's basis, obtain a view walking bridge of using cable tower structure and installation construction method thereof.
In order to achieve the purpose, the landscape walking bridge applying the cable tower structure comprises a bridge deck steel box girder, a cable tower steel structure and steel inhaul cables, and is characterized in that the bridge deck steel box girder integrally adopts an arc-shaped plane structure, and the bottoms of two ends of the bridge deck steel box girder are respectively provided with a bridge abutment foundation and a bridge pier foundation and are fixed by embedded pieces; the bridge deck steel box girder is transversely not segmented along the cross section direction, is longitudinally divided into 3 sections of a north side span, a middle span and a south side span along the length direction, two adjacent sections of side spans are fixed through butt joints, two groups of cable tower steel structures are erected on each section of side span at equal intervals, and a steel cable is respectively pulled on the left and right of each group of cable tower steel structures.
The landscape walking bridge is a welded box type three-span cable truss system, the span of a main span is 54.75 meters, the span of two sides is 13.85 meters, steel structures are welded, and nodes are welded or pin-jointed.
The length of a north side span is 28.4m, the width of a bridge deck is 8m, and the height of a cross section is 0.75-0.9 m; the length of the midspan is 25.6m, the width of the bridge deck is 8m, and the height of the cross section is 0.69-0.9 m; the south side span length is 28.4m, the bridge deck width is 8m, and the section height is 0.75-0.9 m.
The cable tower steel structure includes the cable tower body, the cable connecting plate, middle steel box girder, the cantilever beam, the horizontal cross-section direction both ends of following of middle steel box girder is fixed by the cantilever beam, the horizontal length of cantilever beam at both ends equals and is 1.5 times of middle steel box girder horizontal length, the panel slant of steel box girder is fixed in the middle of the cable tower body inserts, and in cable tower bottom and main case roof beam junction segmentation, realize that the whole inclination of cable tower body is 45, the both ends of each cable tower body are respectively in the fixed cable connecting plate of panel of middle steel box girder, be used for fixed steel cable.
The butt joint adopts a segmented steel beam, a palm tower, a stacking plate and a middle folding section, the segmented steel beam is fixed at one end of one side span of two adjacent sections through the palm tower, the middle folding section is fixed at one end of the other side span, and the middle folding section is combined through the stacking plate.
The walking bridge has 2 abutments and 2 piers, and the embedded parts at the abutments are bonded by 8 piecesThe lower end of each anchor bar is provided with a 160X160X40 anchor plate, and each anchor plate is applied with 550KN prestress; the embedded part of the pier is provided with a spherical hinge compression support embedded part and a tension and compression rod structure embedded part, an anchor bar of the tension and compression rod structure embedded part is subjected to plug welding with an anchor plate perforation, the anchor bar is 8D (32 mm) HRB400 steel bars, the anchor plate D (70 mm) and the thickness t (30 mm).
The utility model relates to an use view pedestrian bridge of cable tower structure and installation construction method thereof, structural design is slim and graceful, clean and tidy, pleasing to the eye.
[ description of the drawings ]
FIG. 1 is a general construction flow chart
FIG. 2 is a transverse structural view of a bridge deck
FIG. 3 arrangement of the vertical surface of a walking bridge
FIG. 4 sectional arrangement of bridge deck beams
FIG. 5 schematic cross-section of a bridge deck
FIG. 6 Main body steel box girder butt joint form
Fig. 7 cable tower section field connection form
FIG. 8 placement deployment of an embedded part
Fig. 9 buried member arrangement of pier
Description of the drawings
1 bridge deck steel box girder, 1.1 north side span, 1.2 midspan, 1.3 south side span
2 cable tower steel structure, 2.1 cable tower body, 2.2 cable connecting plate, 2.3 middle steel box girder, 2.4 cantilever beam,
3 steel inhaul cable
4 butt joints, 4.1 segmented steel beams, 4.2 palm towers, 4.3 strakes and 4.4 middle closure segments,
5 pier embedded parts, 5.1 spherical hinge compression support embedded parts, 5.2 tension and compression rod structure embedded parts and 6 bridge abutment embedded parts.
[ detailed description of the invention ]
The technical solution of the present invention will be further described with reference to the accompanying drawings and examples, which are believed to be clear to those skilled in the art.
Examples
The walking bridge is a welded box type three-span cable truss system, the span of the main span is 54.75 meters, and the span of the two sides is 13.85 meters. And (5) welding a steel structure, wherein the joint adopts a welding form or a pin joint.
the walking bridge spans across Zhang Tang from south to north, the east is Huangpu river, and the west is in Longteng Daodan.
The steel structure engineering content of the standard section is the manufacturing and installation work of corresponding embedded parts of the walking bridge, the bridge deck steel box girder, the cable tower steel structure and the steel cables. The steel structure engineering installation amount is summarized as the following table (the weight includes the hoisting ropes such as the lifting hook): the total length of the walking bridge is 82.414 m; the total steel consumption of the steel structure design is about 241 tons (no embedded parts, stay cables and the like); steel products are mainly Q345C, and all steel members in the project are hoisted by being transported to a construction site after being manufactured and processed by a green space steel structure manufacturing plant.
As shown in fig. 1, the method for installing and constructing the landscape walking bridge applying the cable tower structure comprises the manufacturing and installation of corresponding embedded parts of the walking bridge, a bridge deck steel box girder, a cable tower steel structure and a steel cable, and is characterized by comprising the following steps:
firstly, performing segmented pre-assembly, including bridge deck steel box girder segmentation and cable tower segmented assembly; the bridge deck steel box girder is transversely not segmented along the cross section direction, and is longitudinally divided into 3 sections of a north side span, a mid-span and a south side span along the length direction; each single cable tower body is segmented at the joint of the cable tower bottom end and the main box girder; all the steel members are manufactured and processed by a steel structure manufacturing factory and then transported to a construction site for hoisting;
Step two, segmental transportation, namely sequentially transporting all segmental steel members in segments, and hoisting all the members along with the steel members; the engineering does not need to be provided with a field assembly site, all components are lifted along with the construction, and the assembly work is carried out in the air. In order to ensure the safe operation of the floating crane ship and the transport ship, the navigation capacity of the river channel (the full-load draught of the floating crane ship is 1.8 meters, and the full-load draught of the transport ship is 1.9 meters) is ensured, the existing river channel is surveyed, and the local shallow beach area needs dredging. Huangpu river rises tide and moves back tide 2 times a day, and my company mainly considers carrying out the previous tide operation, namely the floating crane ship and the transport ship enter the operation when rising tide, finish the hoisting operation, can withdraw from the scene when moving back tide.
step three, hoisting in sections, wherein the span of the walking bridge is 13.85 meters by 54.75 meters by 13.85 meters, and the walking bridge spans over a family pond port, and in order to meet hoisting requirements, 180-ton floating crane ships are adopted in the scheme to hoist the bridge deck beams, and the names of the ships are as follows: a Yanrongtai 608 luffing jib crane ship;
Step four, assembling the steel box girders in blocks, wherein the steel box girders are not divided into sections in the transverse direction (the cross section direction), and are divided into 3 sections in the longitudinal direction (the length direction), the side spans of the two adjacent steel box girders are fixed through butt joints, and the 3 sections of the sectional members of the steel box girders are provided with two longitudinal webs to form a box body or a support is additionally arranged on one side of the opening of the box body for temporary reinforcement;
the steel box girder segmentation principle is as follows:
1, the framework has enough strength, rigidity and stability after segmentation.
And 2, the steel structure construction process requirements are complied with, and the welding feasibility requirements are met.
3, the size and the weight of the segmented steel members are reasonably distributed, and the requirements of transportation and hoisting are met.
4, limited by field conditions (high-altitude operation and the like), the welding workload and the welding stress on the field are considered, the welding amount of the main steel plate butt joint and the like needing through-fusion welding is reduced, and the welding quality is ensured.
The 5-segment component is provided with two longitudinal webs as far as possible to form the box body, and if the requirement cannot be met, a support needs to be additionally arranged on one side of the opening of the 5-segment component for temporary reinforcement before delivery.
And step five, after the steel box girder is installed, installing the upper cable tower and the steel stay cable, and arranging temporary steel supports at the positions of two banks to ensure the stability of the steel girder during installation, wherein the steel supports meet the construction requirements through checking calculation. Erecting two groups of cable tower steel structures at equal intervals on each section of side span through the temporary steel bracket, finishing sectional installation, and respectively drawing a steel cable on the left and right of each group of cable tower steel structures;
The segmentation of cable tower and steel case roof beam junction, the thick board that cable tower adopted has: 80mm, 60mm,50mm,40mm,30mm and the like, and the structure is complex. In order to meet the construction requirements and the transportation requirements, the cable tower adopts a sectional construction process: the joint of the cable tower and the main box girder needs to be segmented. And after the cable tower is installed, the cable tower is welded on site, and the welded seam of the on-site welding is required to be attractive in appearance. After welding, the ear plate is cut off and painted after being polished and flattened.
And step six, welding, painting, dismantling measure supports and the like. The project has more butt welding seams on site, and particularly when the closure section is installed and the cable tower is installed, the next section of steel beam can be hoisted after welding. Welding a welding seam of a component butt joint interface, wherein the welding of each beam is considered according to the time of occupying 1 day; safe scaffold puts up and paint construction all arranges to accomplish daytime, carries out the overlap joint operation with the welding, does not consider extra occupation time. To sum up, the engineering is divided into 3 sections of steel box girders, and the installation is considered according to the comprehensive construction period of 2 days per section.
Embedded part installation technical methodThe scheme, the walking bridge has 2 abutment and 2 pier totally, and the setting of burying is as follows: the embedded parts at the bridge abutment are bonded by 8 piecesThe anchor bar lower end is provided with 160X160X40 anchor plates, and each anchor plate is prestressed with 550 KN. The pier embedded part comprises a spherical hinge compression support embedded part and a tension-compression rod structure embedded part. The anchor bars of the embedded part of the tension-compression rod structure are plug welded with the through holes of the anchor plate, the anchor bars are 8D (32 mm) HRB400 steel bars, the anchor plate D (70 mm) and the thickness t (30 mm).
Installation of embedded parts:
1, piling the bearing platform of the walking bridge, completing construction of the reinforcement cage, and installing the embedded parts before pouring concrete. In order to ensure the installation size of the embedded parts and avoid the displacement of the embedded parts caused by the extrusion of concrete in the concrete pouring process, L75 x 6 angle steel is welded into a bracket form and is welded with main ribs of a reinforcement cage, so that the deformation and the displacement of the embedded parts are controlled within an allowable error range. The method comprises the following specific steps:
2, providing a construction control point, and measuring and positioning the position of the embedded part by adopting a SET2C total station. And after the embedded parts are installed, pouring concrete, and in the concrete pouring process, measuring and controlling the positions of the embedded parts in real time to control the displacement of the embedded parts within an allowable error range.
specifically, in this embodiment, 1 an embedded part and a temporary support are installed, 2 GL-1 segmented steel box girders are installed, 3 GL-2 segmented steel box girders are installed, 4# 1, 2#, 5#, 6# cable towers and corresponding cables are installed, 5# steel cables N1 and N2 corresponding to the 1# cable tower and the 6# cable tower are first tensioned and the elevation, position and the like of the steel box girders are checked, 6# GL-3 segmented steel box girders are installed, 7 # 3, 4# cable towers and corresponding cables are installed, 8 # steel cables N5 and N6 are first tensioned and other steel cables are adjusted again to enable the steel cable force to meet the design requirements.

Claims (6)

1. A landscape walking bridge applying a cable tower structure comprises a bridge deck steel box girder, a cable tower steel structure and steel inhaul cables, and is characterized in that the whole bridge deck steel box girder adopts an arc-shaped plane structure, and the bottoms of two ends of the bridge deck steel box girder are respectively provided with a bridge abutment foundation and a bridge pier foundation and are fixed by embedded parts; the bridge deck steel box girder is transversely not segmented along the cross section direction, is longitudinally divided into 3 sections of a north side span, a middle span and a south side span along the length direction, two adjacent sections of side spans are fixed through butt joints, two groups of cable tower steel structures are erected on each section of side span at equal intervals, and a steel cable is respectively pulled on the left and right of each group of cable tower steel structures.
2. the landscape foot bridge applying the cable tower structure as claimed in claim 1, wherein the landscape foot bridge is a welded box type three-span cable truss system, the main span is 54.75 m, the two-side span is 13.85 m, and the steel structures are welded, and the nodes are welded or pin-jointed.
3. The landscape foot bridge applying the cable tower structure of claim 1, wherein the north side span length is 28.4m, the bridge deck width is 8m, and the section height is 0.75-0.9 m; the length of the midspan is 25.6m, the width of the bridge deck is 8m, and the height of the cross section is 0.69-0.9 m; the south side span length is 28.4m, the bridge deck width is 8m, and the section height is 0.75-0.9 m.
4. The landscape walking bridge applying the cable tower structure as claimed in claim 1, wherein the cable tower steel structure comprises a cable tower body, a cable connecting plate, a middle steel box girder and a cantilever girder, both ends of the middle steel box girder in the transverse cross-sectional direction are fixed by the cantilever girder, the transverse lengths of the cantilever girders at both ends are equal and are 1.5 times of the transverse length of the middle steel box girder, the cable tower body is inserted into the panel of the middle steel box girder to be obliquely fixed, and is segmented at the joint of the cable tower bottom end and the main box girder, so that the overall inclination of the cable tower body is 45 degrees, and both ends of each cable tower body are respectively fixed with a cable connecting plate on the panel of the middle steel box girder to fix the steel cable.
5. The landscape foot bridge using the cable tower structure according to claim 1, wherein the butt joint comprises a segmented steel beam, a palm tower, a yard plate and a middle folding section, the segmented steel beam is fixed at one end of one side span of two adjacent segments through the palm tower, the middle folding section is fixed at one end of the other side span, and the middle folding section is combined through the yard plate.
6. The landscape foot bridge applying the cable tower structure according to claim 1, wherein the foot bridge has 2 bridge abutments and 2 bridge piers, and 8 embedded parts at the bridge abutments are bondedThe lower end of each anchor bar is provided with a 160X160X40 anchor plate, and each anchor plate is applied with 550KN prestress; the embedded part of the pier is provided with a spherical hinge compression support embedded part and a tension and compression rod structure embedded part, an anchor bar of the tension and compression rod structure embedded part is subjected to plug welding with an anchor plate perforation, the anchor bar is 8D (32 mm) HRB400 steel bars, the anchor plate D (70 mm) and the thickness t (30 mm).
CN201920112226.9U 2019-01-23 2019-01-23 Landscape walking bridge applying cable tower structure Active CN209779429U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109722981A (en) * 2019-01-23 2019-05-07 上海绿地建设(集团)有限公司 A kind of landscaping walking-bridge and its construction method of installation using Sarasota structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109722981A (en) * 2019-01-23 2019-05-07 上海绿地建设(集团)有限公司 A kind of landscaping walking-bridge and its construction method of installation using Sarasota structure
CN109722981B (en) * 2019-01-23 2024-04-12 上海绿地建设(集团)有限公司 Landscape walking bridge using cable tower structure and installation and construction method thereof

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