CN214459528U - Board purlin combination system view bridge - Google Patents

Abstract

The utility model discloses a board purlin combination system view bridge, including the truss, this truss includes inboard purlin piece, outside purlin piece and last tie, and this inboard purlin piece, outside purlin piece and last tie are hualun formula truss, and three stable hualun formula trusses in plane constitute a stable triangle-shaped with the mode of sharing chord member on the space, have increased substantially the off-plate rigidity of main purlin, and overall structure rigidity is big, and anti-wind anti-seismic performance is good. The upper parallel connection is a horizontal Wallon truss, the inner side truss sheet is a vertical Wallon truss, and the outer side truss sheet is an outward-inclined curved Wallon truss, so that the structure is regular, the form is novel, the appearance is attractive, and the landscape effect is good. The pushing construction is adopted, necessary temporary piers are arranged on the side span during pushing, main beams on two sides of the side span are temporarily and fixedly connected with main beams of the main span, and the side span main beams are used as guide beams for pushing so as to reduce the construction cost.

Description

Board purlin combination system view bridge

Technical Field

The utility model relates to a bridge technical field, in particular to board purlin combination system view bridge.

Background

The steel truss has strong spanning capability and good landscape effect, and is widely applied to the construction of roads and railway bridges. In recent decades, a plurality of steel truss girder bridges are built in China, and the bridge type plays an important role in bridge engineering. With economic progress, the existing bridge not only needs to meet the traffic function, but also needs to take the aesthetic feeling of the building into consideration. The traditional steel truss girder bridge is formed by a plurality of transverse vertical main girders and transverse connection, and the structural form is too single and classical, so that the requirement of the shape of the bridge on attractive appearance is difficult to meet. Meanwhile, the standard value of the traditional steel truss girder bridge load is low, so that the bearing capacity of a large number of bridges is insufficient, the structure is integrally unstable, the wind and earthquake resistance is weak, and the bridge is easy to damage during use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve one of the technical problem that exists among the prior art at least, provide a board purlin combination system view bridge, can strengthen the bearing capacity of this view bridge, improve wind-resistant anti-seismic performance, make this view bridge more pleasing to the eye simultaneously.

The utility model adopts the technical proposal that: a plate and truss combined system landscape bridge comprises a truss, wherein the truss comprises an inner truss sheet, an outer truss sheet and an upper parallel connection; the inner truss sheet comprises a first upper chord, a first lower chord and a first web member; the outer side truss piece comprises a second upper chord, a second lower chord and a second web member; the first lower chord and the second lower chord are shared components; an upper flat web member is arranged between the first upper chord member and the second upper chord member, and the first upper chord member, the second upper chord member and the upper flat web member form an upper flat connection; the first web members, the second web members and the upper flat web members are arranged in a structure of a Hualun truss, and the first web members and the second web members are arranged in a staggered mode.

Has the advantages that: the plate girder combined system landscape bridge is provided with the inner side girder piece and the outer side girder piece, and the web members of the inner side girder piece and the web members of the outer side girder piece are arranged in a staggered mode, so that the plate girder combined system landscape bridge is regular in structure, novel in form, attractive in appearance and good in landscape effect. On the premise of ensuring larger spanning capacity, each component of the bridge-type structure main truss is a plane-stable Hualun truss, each main truss is composed of three stable Hualun trusses, and the three stable Hualun trusses form a space-stable triangle in a shared chord manner, so that the out-of-plane rigidity and the integral structural rigidity of the single main truss are greatly increased, and the wind-resistant and earthquake-resistant performance is improved.

Further, the inner side truss piece is arranged to be vertical, and the outer side truss piece is arranged to be inclined outwards.

Further, still include the arc portal frame, this arc portal frame is located the both ends of truss, and a pair of this truss links to each other through the arc portal frame, and this first upper chord member and second upper chord member are middle low both ends high curved bar.

Further, the arc-shaped bridge portal frame comprises a bridge portal frame upper chord member, a bridge portal frame lower chord member is arranged below the bridge portal frame upper chord member, the end part of the bridge portal frame lower chord member is connected with end web members of the inner side truss piece and the outer side truss piece, a reinforcing web member is arranged between the end parts of the bridge portal frame lower chord members, the end part combination points of the first upper chord member and the second upper chord member are provided with reinforcing web members for connection, and the bridge portal frame upper chord member and the bridge portal frame lower chord member are connected in a staggered mode through the bridge portal frame web members.

Furthermore, a midspan top frame is arranged between the first upper chords on the two sides of the landscape bridge body, the midspan top frame is positioned in the middle of the landscape bridge body, and the midspan top frame protrudes upwards.

The bridge deck system comprises main beams, cross beams, longitudinal beams and bridge decks, wherein the main beams are positioned on two sides of the landscape bridge body and share the first lower chord and the second lower chord, and the cross beams are used for connecting the main beams on the two sides and are arranged at the junction points of the first web members and the second web members in the truss and the main beams; the longitudinal beams are arranged between the main beams, and the bridge deck is arranged between the main beams.

Further, still include main mound, this main mound contains mound leg and spreader, and this mound leg sets up the support at the top, and this spreader is used for connecting the mound leg of landscape bridge body both sides.

Further, the plate girder combined system landscape bridge comprises a main span and an edge span, the truss is arranged on the main span, the edge span is only provided with the bridge deck system, the bridge deck system of the edge span is disconnected with the bridge deck system of the main span and is provided with an expansion joint, and the edge span and the main span form a simply supported structure.

Further, the bridge deck is wholly or partially provided with high-strength glass.

Drawings

The invention will be further described with reference to the following figures and examples:

FIG. 1 is a perspective view of an embodiment;

FIG. 2 is a top view of an embodiment host bridge;

FIG. 3 is a front view of an embodiment host bridge;

FIG. 4 is a side sectional view of the embodiment;

FIG. 5 is a schematic structural view of an upper parallel connection of the embodiment;

FIG. 6 is a schematic structural view of an inner cross piece according to an embodiment;

FIG. 7 is a schematic structural view of an outer truss panel of an embodiment;

FIG. 8 is a schematic structural diagram of an arcuate gantry of an embodiment;

FIG. 9 is a schematic view of a state in which step 1 is carried out;

FIG. 10 is a diagram illustrating a state in which step 2 is performed;

FIG. 11 is a diagram illustrating a state where step 3 is performed;

FIG. 12 is a diagram illustrating a state in which step 4 is performed;

1-first upper chord, 2-second upper chord, 3-first web member, 4-second web member, 5-upper flat web member, 6-portal frame lower chord, 7-portal frame web member, 8-main beam, 9-cross beam, 10-longitudinal beam, 11-bridge deck plate and 12-main pier.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 8, the plate girder combined system landscape bridge mainly comprises a girder, a bridge deck system, a main pier 12 and an arc-shaped bridge portal frame. The truss comprises an inner truss sheet, an outer truss sheet and an upper flat connector, wherein the inner truss sheet, the outer truss sheet and the upper flat connector are all a Hualun truss, and three stable-plane Hualun trusses form a stable triangle in space in a mode of sharing chords, so that the out-of-plane rigidity of the main truss is greatly increased, the overall structure rigidity is high, and the wind and earthquake resistance performance is good. Specifically, the upper flat connection is a horizontal Wallon truss, the inner side truss sheet is a vertical Wallon truss, and the outer side truss sheet is an outward-inclined curved Wallon truss, so that the structure is regular, the form is novel, the appearance is attractive, and the landscape effect is good.

Specifically, this inboard truss piece includes first upper chord 1, first lower chord and first web member 3, and this outboard truss piece includes second upper chord 2, second lower chord and second web member 4, and wherein first lower chord and second lower chord are shared component, are equipped with flat web member 5 on between first upper chord 1 and the second upper chord 2. The first web members 3 and the second web members 4 are arranged in a staggered mode, so that the landscape bridge body structure is more stable, and the visual field of the landscape bridge is increased. The upper flat connection can be an independent component and formed by welding two rods and an upper flat web member 5, and is finally welded between the first upper chord 1 and the second upper chord 2, or formed by directly welding the upper flat web member 5 between the first upper chord 1 and the second upper chord 2. Preferably, the inner truss panel and the outer truss panel are welded.

Specifically, the trusses on the two sides of the landscape bridge body are connected through the arc-shaped bridge portal frame, the first upper chord 1 and the second upper chord 2 are curved rods with high middle parts and low two sides, and the trusses on the two sides of the landscape bridge body are connected to form a cradle-shaped waffle truss, so that the trusses of the landscape bridge body are more attractive and have a more novel structure. Preferably, the arc-shaped bridge portal frame is welded with the truss.

Specifically, this arc portal frame includes portal frame upper chord, and this portal frame upper chord is two inside and outside arc poles, and inboard portal frame upper chord is connected with the first upper chord 1 of the view pontic left and right sides, and the portal frame upper chord in the outside is connected with the second upper chord 2 of the view pontic left and right sides. The lower part of the upper chord of the bridge portal frame is correspondingly provided with a lower chord 6 of the bridge portal frame, and the size of the lower chord 6 of the bridge portal frame is smaller than that of the upper chord of the bridge portal frame. The end part of the lower chord 6 of the bridge portal is connected with a first web member 3 and a second web member 4 which are positioned at the bridge head and the bridge tail, a reinforcing web member is arranged between the end parts of the lower chord of the bridge portal, and a reinforcing web member is arranged at the joint point of the end parts of the first upper chord and the second upper chord and is connected with the first upper chord. The upper chord member of the bridge portal frame and the lower chord member 6 of the bridge portal frame are connected in a staggered mode through web members 7 of the bridge portal frame, and a triangular structure is formed among the web members 7 of the bridge portal frame, the upper chord member of the bridge portal frame and the lower chord member 6 of the bridge portal frame. The stability of the truss is enhanced, and the wind-resistant and earthquake-resistant performance is improved.

Specifically, a middle-span top frame is arranged between the first upper chords 1 on the two sides of the landscape bridge body, the middle-span top frame is located in the middle of the landscape bridge body, and the middle-span top frame protrudes upwards. Preferably, the middle-span top frame comprises six arc-shaped rod pieces, the left side and the right side of the landscape bridge body are respectively provided with three arc-shaped rod pieces, one end of each arc-shaped rod piece is connected with the first upper chord 1, the other end of each arc-shaped rod piece is converged at one point in the center of the bridge deck to form a dome structure, and the landscape is additionally arranged at the dome structure, so that the top of the landscape bridge body is provided with a mark, and the attractiveness is improved.

Specifically, this plate girder combination system view bridge still includes the bridge floor system, and this bridge floor system contains girder 8, crossbeam 9, longeron 10 and decking 11, and this girder 8 is located the bridge both sides and is the sharing component with this first lower chord member, second lower chord member, and this crossbeam 9 is used for connecting both sides girder 8 and sets up the junction of web member and girder 8 in this truss. The stringers 10 are arranged between the main beams 8 for transferring deck loads to the cross beams 9, and the deck plates 11 are arranged between the main beams 8.

Preferably, for increasing the view effect, this first upper chord 1, second upper chord 2 and girder 8 all set up to chamfer box section or the circular section of major diameter, should go up the parallel joint, first web member 3, second web member 4, go up flat web member 5 and portal web member 7 and set up to the circular section of minor diameter.

Specifically, the plate girder combined system landscape bridge further comprises a main pier 12, and the main pier 12 is arranged below the main beam 8. Preferably, the main pier 12 is made of concrete and is arranged in a type a, the main pier 12 comprises pier legs provided with a support at the top, transverse columns for connecting the pier legs at both sides of the landscape bridge body, and a tie beam positioned below the pier legs and arranged with its shape as an inward-concave arc, so that its side view shows a cradle base.

The span with the largest span is called the main span, and the span with the smaller span is called the side span. Preferably, the plate girder composite system landscape bridge comprises a main span on which the girder is disposed and an edge span on which only the deck system is disposed to reduce the negative bending moment above the main pier 12 so that the landscape bridge can span a greater distance. The side span bridge deck system and the main span bridge deck system are interrupted and provided with expansion joints, and the side span and the main span form a simply supported structure, so that the landscape bridge is convenient to construct and install.

Preferably, the bridge deck 11 is made of high strength glass in whole or in part to improve the landscape effect of the landscape bridge.

Referring to fig. 9 to 12, the main bridge adopts incremental launching construction, and the construction method of the plate-truss combined system landscape bridge is divided into four steps.

Step 1: and (5) building a construction platform and a steel cofferdam to finish the construction of the main pier 12 and the temporary pier.

Step 2: and splicing the side span steel plate composite beam on site to serve as a guide beam, and welding and splicing the main span Wallon type steel truss on site behind the guide beam.

And step 3: and pushing the guide beam and the main span to a design position.

And 4, step 4: and after the pushing is finished, removing the temporary pier, hoisting and welding another steel plate combination beam side span on site, welding the bridge deck 11, paving the bridge deck pavement, and installing the auxiliary facilities.

Specifically, in the aspect of a construction method, factors such as site conditions, transportation conditions, under-bridge traffic conditions and the like can be comprehensively considered, and various construction methods such as pushing, hoisting and splicing, full framing and the like are selected.

Referring to fig. 1, the bridge is a river-crossing pedestrian overpass in a certain city, and has the main function of connecting a certain island in a river and a coastal river for pedestrian crossing the river. The bridge span is arranged to be 2 x 40+168+2 x 40m, the main span adopts 168m cradle type Hualun steel truss simply supported girder bridge to span the channel under the bridge, and the two sides of the main span are respectively provided with 2 x 40m simply supported steel plate girders to be respectively connected with a riverside and a certain island. The bridge deck is characterized in that two main trusses are transversely arranged, the height of a middle truss of each main truss is 10.5m, the height of a fulcrum truss is 20.5m, the transverse center distance of the two main trusses is 18m, each main truss is composed of three Hualun trusses, a cross beam 9 is arranged between the two main trusses at intervals of 6m, an orthotropic bridge deck is erected on the cross beam 9, and the width of the bridge deck is designed to be 2m (the width of a lower chord of the main truss) +16m (the width of a passing net width) +2m (the width of a lower chord of the main truss) ═ 20 m.

The first upper chord 1, the second upper chord 2, the main beam 8, the portal upper chord and the portal lower chord 6 of the main bridge adopt box-shaped sections, and the first upper chord 1 and the second upper chord 2 are compression rods, so that stiffening ribs are arranged in the box to ensure local stability; the upper flat web member 5 and the bridge portal web member 7 adopt I-shaped sections; the first web member 3 and the second web member 4 are made of box-shaped sections or I-shaped sections, wherein the members in the range close to the fulcrum are made of box-shaped sections, and the members in the span range are made of I-shaped sections. First upper chord 1, second upper chord 2, girder 8, portal upper chord, portal lower chord 6 adopt Q500qENH steel, and first upper chord 1, second upper chord 2, portal upper chord, portal lower chord 6 member are 1000mm high, 1000mm wide, and 36 ~ 50mm thick. The height of the 8 main beam rods is 2000mm, the width of the 8 main beam rods is 2000mm, and the thickness of the plates is 28-50 mm. The bridge adopts integral all-welded node, and every section upper chord, girder 8 are a prefabricated node promptly, and every section length 12002 ~ 12292mm of first upper chord 1, second upper chord 2, every section length 6000mm of girder 8. The upper flat web member 5 and the bridge portal web member 7 are made of Q420qE steel, and have box-shaped cross sections, the height is 500mm, the width is 500mm, the plate thickness is 28mm, and the length of the rod member is 5909 mm-10095 mm. The first web member 3 and the second web member 4 are made of Q420qE steel, and have a box-shaped section or an I-shaped section, the height is 500mm, the width is 800mm, the plate thickness is 28-48 mm, and the length of the rod member is 10000-20591 mm. And stiffening ribs with the thickness of 20mm are arranged on the compression plate of the first upper chord 1 and the second upper chord 2 in the box-shaped section rod. A crossbeam 9 is longitudinally arranged between the two main trusses at intervals of 6000m, and the box-shaped section is 2000mm in height, 1000mm in width and 32mm in thickness. The longitudinal beam 10 has an H-shaped cross section, a height of 1000mm, a width of 800mm and a thickness of 32 mm. The bridge deck slab 11 is made of orthotropic bridge deck slabs, L-shaped stiffening ribs, Q370qE steel materials and 16mm in thickness of the bridge deck slab 11. The bridge deck pavement is 5.5cm epoxy asphalt concrete.

The main pier 12 is a portal pier, adopts a rectangular section, adopts a pile group foundation, adopts a bored or punched cast-in-place pile, and has the pile diameter of 2 m. The top surface of the bearing platform is set into a curved surface to imitate the bent leg structure of the cradle. The side pier is a column pier, adopts a rectangular cross section, adopts a pile group foundation and adopts a drill or punching cast-in-place pile, and the pile diameter is 1.5 m. The thickness of the bearing platform is different according to the different pile diameters, the minimum thickness of the pile bearing platform with the diameter of the main pier 12 being 2.0m is 3.945m, and the thickness of the pile bearing platform with the diameter of the side pier being 1.5m is 2.5 m. The pile foundation adopts a cast-in-situ bored pile or a cast-in-situ punched pile, the diameter of the cast-in-situ bored pile or the cast-in-situ punched pile is 1.5m and 2.0m, the bearing capacity of each pile is 9000kN and 15000kN, and the average pile length is about 40 m.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1. The utility model provides a board purlin combination system view bridge which characterized in that: the landscape bridge comprises a pair of trusses, wherein the trusses are symmetrically arranged on the left side and the right side of a landscape bridge body and comprise inner truss sheets, outer truss sheets and upper parallel connection;

the inner side truss piece comprises a first upper chord, a first lower chord and a first web member;

the outer side truss sheet comprises a second upper chord, a second lower chord and a second web member;

the first lower chord and the second lower chord are shared components;

an upper flat web member is arranged between the first upper chord member and the second upper chord member, and the first upper chord member, the second upper chord member and the upper flat web member form an upper flat connection;

the first web members, the second web members and the upper flat web members are arranged in a structure of a Hualun truss, and the first web members and the second web members are arranged in a staggered mode.

2. The plate and girder combined system landscape bridge of claim 1, wherein: the inner side truss pieces are arranged to be vertical, and the outer side truss pieces are arranged to be inclined outwards.

3. The plate and girder combined system landscape bridge of claim 1, wherein: the truss structure is characterized by further comprising an arc-shaped bridge portal frame, wherein the arc-shaped bridge portal frame is located at two ends of the truss, the truss is connected through the arc-shaped bridge portal frame, and the first upper chord and the second upper chord are curved rods with middle parts low and two ends high.

4. The plate and girder combined system landscape bridge of claim 3, wherein: arc portal frame includes portal frame upper chord member, portal frame upper chord member below is provided with portal frame lower chord member, portal frame lower chord member tip with inboard purlin piece reaches the tip web member of outside purlin piece is connected, set up between portal frame lower chord member tip and strengthen the web member, the tip binding point of first upper chord member and second upper chord member sets up to strengthen the web member and is connected, adopt portal frame web member cross connection between portal frame upper chord member and portal frame lower chord member.

5. The plate and girder combined system landscape bridge of claim 1, wherein: and a middle-span top frame is arranged between the first upper chords on the two sides of the landscape bridge body, the middle-span top frame is positioned in the middle of the landscape bridge body, and the middle-span top frame is upwards raised.

6. The plate and girder combined system landscape bridge of claim 1, wherein: the landscape bridge comprises a landscape bridge body, a first lower chord, a second lower chord, a first web member, a second web member, a bridge deck system and a second bridge deck, wherein the first lower chord and the second lower chord are arranged on the same side of the landscape bridge body; the longitudinal beams are arranged between the main beams, and the bridge deck is arranged between the main beams.

7. The plate and girder combined system landscape bridge of claim 1, wherein: still include main mound, main mound contains mound leg and spreader, the mound leg sets up the support at the top, the spreader is used for connecting the mound leg of view pontic both sides.

8. The plate and girder combined system landscape bridge of claim 6, wherein: the plate girder combined system landscape bridge comprises a main span and an edge span, wherein the truss is arranged on the main span, the edge span is only provided with the bridge deck system, the bridge deck system of the edge span and the bridge deck system of the main span are interrupted and provided with expansion joints, and the edge span and the main span form a simply supported structure.

9. The plate and girder combined system landscape bridge of claim 6, wherein: the bridge deck is wholly or partially made of high-strength glass.

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