CN102425100A - Wide-bodied pedestrian overpass erected among buildings - Google Patents

Abstract

The invention relates to a wide-bodied pedestrian overpass erected among buildings, which is characterized in that a double-column pier is arranged between the buildings at both sides of a road and the road; the bottom part of the double-column pier is connected with a bored pile foundation assorted with the double-column pier; the top part of the pier is provided with a bent cap; the main bridge of the wide-bodied pedestrian overpass is arranged on the upper surface of the bent cap; cantilevers at both ends of the main bridge are respectively and fixedly connected with the buildings; the main bridge mainly comprises a through steel truss, a bottom sealing steel plate and a deck pavement; the steel truss is formed by connecting upper chord members, lower chord members, web members with steel cross bars; the bottom sealing steel plate is fixed on the lower surfaces of the steel cross bars; and the deck pavement is arranged above the steel cross bars. The wide-bodied pedestrian overpass erected among the buildings has the characteristics as follows: the modeling conception is novel; the design is particular; the service function and the sightseeing function are integrated; higher additional loads can be borne; the designed deck width is large; the stress condition is brighter and clearer; the workload of the design calculation can be greatly reduced; and simultaneously, the construction is convenient, and the influence of the construction process on traffic is less.

Description

Wide body pedestrian bridge erected between buildings

technical field

The invention relates to a wide-body pedestrian bridge erected between buildings, which is widely used for connecting and passing between buildings. It belongs to the technical field of pedestrian bridge construction.

Background technique

Pedestrian bridges are also known as pedestrian overpasses. It is generally built in areas with large traffic volume and dense pedestrians, or on intersections, squares and railways. Pedestrian bridges only allow pedestrians to pass, and are used to avoid conflicts when the planes of traffic and pedestrians intersect, ensure people's safe crossing, increase vehicle speed, and reduce traffic accidents.

In the prior art, common overpasses can be divided into three categories, namely suspended structures, supporting structures and hybrid structures. 1. The overpass with a suspended structure uses the bridge railing as the main load-bearing component. The bridge deck for pedestrians to pass through is not load-bearing, and is suspended on the bridge rail as a load-bearing beam. The overpass with this structure combines structural components with practical components. Together, the use of building materials can be reduced, and the project cost can be relatively reduced. However, the railings of the overpass bridge with this structure are large in size and heavy in weight, and there are two defects: on the one hand, the sight of pedestrians on the bridge will be blocked by the railings, and on the other hand On the one hand, such a huge railing wall is in the road, which hinders the sight of passing vehicles and pedestrians, and affects the city's landscape. 2. The supporting structure of the overpass directly erects the load-bearing bridge on the pier, and the bridge for pedestrians to walk on is laid on the bridge. The bridge railing only serves to protect pedestrians and does not bear weight. higher defect. 3. The cross-street bridge with hybrid structure is a hybrid of the above two structures, and the bridge rail and the bridge are used as load-bearing structures to share the load of the bridge. Pedestrian bridges with this structure have the following defects: first, they can bear small external loads, the designed bridge deck width is small (mostly less than 12m), and the flow of people that can carry is limited, which can only meet a single use function and cannot be aggregated. Sightseeing functions in one. Second, the stress of the structure is complex, the workload of design and calculation is large, the road traffic is often interrupted during the construction period, and the construction period is long. Third, it cannot be connected with the surrounding buildings and cannot coordinate with the surrounding environment.

Contents of the invention

The purpose of the present invention is to solve the shortcomings of the pedestrian bridge in the prior art that it cannot be connected with the surrounding buildings, the width of the bridge deck is small, the structure is stressed, and the design workload is large, and to provide a pedestrian bridge erected between buildings. wide body pedestrian bridge,

The purpose of the present invention can be achieved by taking the following technical solutions:

The structural characteristics of wide-body pedestrian bridges erected between buildings are:

1) Set up double-column bridge piers between the buildings on both sides of the road and the road. The bottom of the double-column bridge piers is connected with the matching bored pile foundation, and the top of the bridge piers is set with a cover beam. The wide-body pedestrian bridge The main bridge is arranged on the top of the cover beam; the cantilevers at both ends of the main bridge are respectively fixedly connected with the building;

2) The main bridge is mainly composed of under-supported steel trusses, bottom-sealed steel plates and bridge deck pavement. The steel trusses are connected by upper chords, lower chords, webs and steel cross-bars, and the bottom-sealed steel plates are fixed on the steel cross-bars. Below, the deck pavement is laid over the steel crossbars.

The purpose of the present invention can also be achieved by taking the following technical solutions:

形角钢与

形附加钢筋叠加焊接而成的固定件，以及带有伸缩缝的连接钢板，两套固定件分别对称布置在主桥的悬臂末端和建筑物上，连接钢板的两端分别与固定件焊接；所述连接钢板的伸缩缝中设有填嵌缝膏。One embodiment of the present invention is: the two ends of the cantilever of the main bridge are respectively connected to the building through the connecting mechanism; the connecting mechanism includes two sets of

Shaped angle steel with

The fixed piece welded by superimposed additional steel bars and the connecting steel plate with expansion joints, the two sets of fixing pieces are arranged symmetrically on the cantilever end of the main bridge and the building respectively, and the two ends of the connecting steel plate are respectively welded to the fixing piece; A caulking paste is provided in the expansion joints connecting the steel plates.

An embodiment of the present invention is: at the connection between the cover beam and the lower chord of the steel truss, a chord leveling plate, a support and a support pad are arranged sequentially from top to bottom; block.

An embodiment of the present invention is that stiffening ribs are provided on opposite sides of the lower chord.

One embodiment of the present invention is: a planter is provided on the outside of the steel truss, and a water ditch is provided on the inside of the steel truss.

One embodiment of the present invention is: a steel girder roof truss is arranged on the top of the steel truss, and a top frame steel plate is arranged on the steel girder roof truss.

One embodiment of the present invention is: a tie beam is arranged between the two supporting piers of the double-column bridge pier.

An embodiment of the present invention is: the deck width of the main bridge is 13.2 meters, the span is 28.50 meters, and the cantilevers at both ends are 9.630 meters and 6.13 meters respectively.

Beneficial effects of the present invention:

1. Since the present invention connects the cantilevers at both ends of the main bridge to the building through the connecting mechanism, it forms a harmonious overall structure with the roadside buildings. Therefore, the whole overpass can be made more light and beautiful, and the under bridge is even more beautiful. Open and concise, unimpeded vehicles, with novel modeling concept, unique architectural design, integrating use function and sightseeing function, capable of bearing large additional load, designed with a large width of bridge deck, and the force situation is clearer and clearer, able to It greatly reduces the workload of design and calculation, and at the same time has the characteristics of convenient construction and little impact on traffic during the construction process. In particular, the façade of the wide-body overpass can be shaped into a transparent line that is in harmony with the surrounding environment.

2. The main bridge of the present invention adopts the cantilever prefabricated continuous steel truss structure type at both ends. The transverse width of the main bridge is 13.2 meters. , the force situation is clearer and clearer, which can greatly reduce the workload of design calculation.

3. In the present invention, a chord leveling plate, a support and a support pad are sequentially arranged between the cover beam and the lower chord of the steel truss; an anti-seismic block is welded on the bottom of the chord leveling plate, which can meet the structural requirements. It should have wind resistance, earthquake resistance and other properties.

4. The main bridge of the present invention is divided into two sections of steel trusses. The steel trusses are manufactured in the factory and welded on site. During the entire construction process of the overpass, the steel trusses can be hoisted up as soon as possible. It has the advantages of convenient construction and short construction period.

Description of drawings

Fig. 1 is the elevation view of the whole structure of the pedestrian bridge of the specific embodiment of the present invention.

Fig. 2 is a sectional view along line A-A in Fig. 1 .

Fig. 3 is an elevation view of a bridge pier and a pile foundation according to a specific embodiment of the present invention.

Fig. 4 is a side view of a bridge pier and a pile foundation according to a specific embodiment of the present invention.

Fig. 5 is a sectional view along A-A in Fig. 3 .

Fig. 6 is a cross-sectional view along B-B in Fig. 3 .

Fig. 7 is a structural schematic diagram of the connection between the cover beam and the lower chord of the steel truss according to the specific embodiment of the present invention.

Fig. 8 is a sectional view along line A-A in Fig. 7 .

Fig. 9 is a cross-sectional view along B-B in Fig. 7 .

Fig. 10 is a schematic structural diagram of a connection mechanism of a specific embodiment of the present invention.

Detailed ways

Specific examples:

With reference to Fig. 1 ~ Fig. 6, present embodiment comprises the double-column bridge pier 1 that is erected on both sides of the road and the bored pile foundation 2 that is matched with it, the cover beam 3 that is arranged on the top of pier 1, is arranged on the cover beam 3 The main bridge 4; the cantilevers at both ends of the main bridge 4 are connected with the building 5 respectively; -3 structure, the steel truss 4-1 is connected by the upper chord 4-1-1, the lower chord 4-1-2, the web 4-1-3 and the steel cross bar 4-1-4, and the back cover plate 4- 2. It is fixed under the steel crossbar 4-1-4, and the bridge deck pavement 4-3 is arranged above the steel crossbar 4-1-4. The wide face width of the main bridge 4 is 13.2 meters, the span is 28.50 meters, and the cantilevers at both ends are 9.630 meters and 6.13 meters respectively. The outer side of the steel truss 4-1 is provided with a planter 4-1-6, and the inner side is provided with a water ditch 4-1-7. The top of the steel truss 4-1 is provided with a steel girder roof truss 4-1-8, and the steel girder roof truss 4-1-8 is provided with a top frame steel plate 4-1-9. A tie beam 11 is arranged between two piers of the double-column pier 1 .

Referring to Fig. 7, Fig. 8 and Fig. 9, between the cover beam 3 and the lower chord 4-1-2 of the steel truss 4-1, a chord leveling plate 7, a support 8 and a support pad are sequentially arranged from top to bottom Stone 9; Welded with anti-seismic block 10 on the bottom surface of chord leveling plate 7. The two opposite sides of the lower chord 4-1-2 are respectively provided with a stiffener lower chord 4-1-5.

形角钢6-1与

形附加钢筋6-2叠加焊接而成的固定件，以及带有伸缩缝的连接钢板6-3，两套固定件分别对称布置在主桥4的悬臂末端和建筑物5上，连接钢板6-3的两端分别与固定件焊接；所述连接钢板6-3的伸缩缝6-3-1中设有填嵌缝膏。Referring to Fig. 10, the cantilevers at both ends of the main bridge 4 are respectively connected to the building through a connecting mechanism; the connecting mechanism includes two sets of

Shaped angle steel 6-1 with

Shaped additional steel bars 6-2 superimposed and welded fixing parts, and connecting steel plates 6-3 with expansion joints, the two sets of fixing parts are respectively symmetrically arranged on the cantilever end of the main bridge 4 and on the building 5, and the connecting steel plates 6- The two ends of 3 are respectively welded with the fixing parts; the expansion joint 6-3-1 of the connecting steel plate 6-3 is provided with caulking paste.

Construction method of the present invention is as follows:

The two steel trusses of the main bridge adopt hoisting technology, and the main bridge structure is cast in place after the hoisting is completed. The pedestrian bridge is located on the busy Pearl River Avenue, and the road traffic cannot be interrupted during the construction period. Therefore, the steel truss must be fabricated in the factory and welded on site.

The first step: construction of pile foundations and bridge piers; at the same time, factory prefabricated steel trusses.

Step 2: Set up temporary supports, transport the semi-finished trusses to the construction site, hoist them in blocks and weld them at the same time.

The third step: install bridge pavement and railings, hang flower pots, decorate the bridge deck, and complete the bridge.

The main design basis of the present invention is as follows:

1) Design parameters:

According to the "Building Structure Load Code" GB 50009-20017.1.1 adopts:

Wind load calculation formula: Wk=βgz×μz×μs×W0. Among them: Wk: standard value of wind load acting on the photovoltaic array (kN/m2), B gz: gust coefficient of instantaneous wind pressure, determined according to "Code for Building Structure Loads" GB 50009-2001.

According to different site types, it is calculated according to the following formula: βgz=K(1+2μf), where K is the area roughness adjustment coefficient, and μf is the pulsation coefficient:

Class A site: βgz＝0.92*(1+2μf) where: μf＝0.387*(Z/10)^(-0.12);

Class B venue: βgz＝0.89*(1+2μf) where: μf＝0.5(Z/10)^(-0.16);

Class C venue: βgz＝0.85*(1+2μf) where: μf＝0.734(Z/10)^(-0.22);

Class D site: βgz＝0.80*(1+2μf) where: μf＝1.2248(Z/10)^(-0.3);

μz---coefficient of wind pressure height change, determined according to "Code for Building Structure Loads" GB 50009-2001, and calculated according to the following formula according to different site types:

Class A venue: μz=1.379×(Z/10)0.24;

Class B venue: μz=(Z/10)0.32;

Class C venue: μz＝0.616×(Z/10)0.44;

Class D venue: μz＝0.318×(Z/10)0.60;

This project belongs to Class B area, so μz=1.379×(Z/10)0.24, μs---wind load shape coefficient, according to "Building Structure Load Code" GB 50009-2001 is taken as: 2.0, W0---basic wind According to the on-site wind speed test wind pressure diagram, it is taken as 0.7kN/m2

2) Earthquake action: The seismic design intensity is taken as 7 degrees, and the seismic influence coefficient is taken as 0.08.

3) Effect of temperature: the annual temperature change is taken as 80 degrees Celsius.

The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field within the scope of the disclosure of the present invention, according to the technical solutions of the present invention and Any equivalent replacement or change of the inventive concept falls within the protection scope of the present invention.

Claims (9)

1. be set up in the expanded letter pedestrian overcrossing between the building, it is characterized in that:

1) between the building (5) of road both sides and road, two-columned pier (1) is set; The bottom of two-columned pier (1) is connected with supporting with it bored pile foundation (2); At the top of bridge pier (1) bent cap (3) is set, the main bridge (4) of expanded letter pedestrian overcrossing be arranged on bent cap (3) above; The two ends cantilever of said main bridge (4) is fixedly connected with building (5) respectively;

2) said main bridge (4) is mainly by comprising lower support type steel truss (4-1), back cover steel plate (4-2) and deck paving (4-3); Steel truss (4-1) is formed by connecting upper chord (4-1-1), lower chord (4-1-2), web member (4-1-3) and steel cross bar (4-1-4); Back cover steel plate (4-2) be fixed in steel cross bar (4-1-4) below, deck paving (4-3) is located at the top of steel cross bar (4-1-4).

2. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 is characterized in that: the two ends cantilever of said main bridge (4) is connected with building (5) through bindiny mechanism respectively; Said bindiny mechanism comprises the fixture that two covers are welded by

shape angle steel (6-1) and the stack of

shape additional bar (6-2); And the connection steel plate (6-3) that has the shrinkage joint; Two cover fixtures are arranged symmetrically in respectively on the cantilevered distal end and building (5) of main bridge (4), and weld with fixture respectively at the two ends that connect steel plate (6-3); Be provided with in the shrinkage joint (6-3-1) of said connection steel plate (6-3) and fill out sealant.

3. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 and 2 is characterized in that: said lower support type steel truss (4-1) is made up of the steel truss welding of two sections same structures.

4. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 and 2 is characterized in that: the junction at the lower chord (4-1-2) of bent cap (3) and steel truss (4-1) is provided with chord member leveling board (7), bearing (8) and bearing pad stone (9) from top to bottom successively; Be welded with antidetonation link stopper (10) in chord member leveling board (7) bottom surface.

5. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 and 2 is characterized in that: respectively be provided with stiffening rib (4-1-5) in the relative both sides of said lower chord (4-1-2).

6. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 and 2 is characterized in that: be provided with colored groove (4-1-6) in the outside of said steel truss (4-1), be provided with ditch (4-1-7) in the inboard of steel truss (4-1).

7. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 and 2 is characterized in that: be provided with girder steel roof truss (4-1-8) at the top of said steel truss (4-1), on girder steel roof truss (4-1-8), be provided with upper frame steel plate (4-1-9).

8. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 and 2 is characterized in that: between two supporting piers of said two-columned pier (1), be provided with binder (11).

9. the expanded letter pedestrian overcrossing that is set up between the building according to claim 1 and 2 is characterized in that: the bridge deck width of said main bridge (4) is 13.2 meters, and span is 28.50 meters, and the two ends cantilever is respectively 9.630 meters and 6.13 meters.

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