CN111350123A - Steel box truss type arch truss segment and support-free assembling and erecting method thereof - Google Patents
Steel box truss type arch truss segment and support-free assembling and erecting method thereof Download PDFInfo
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- CN111350123A CN111350123A CN202010177968.7A CN202010177968A CN111350123A CN 111350123 A CN111350123 A CN 111350123A CN 202010177968 A CN202010177968 A CN 202010177968A CN 111350123 A CN111350123 A CN 111350123A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a steel box truss type arch truss segment and a support-free assembling and erecting method thereof, belonging to the technical field of arch bridge construction, wherein the arch truss segment comprises arch truss sheet segments, two groups of the arch truss sheet segments are arranged, each arch truss sheet segment comprises an upper chord and a lower chord, the upper chord and the lower chord are fixedly connected through a web member, and the end parts of the upper chord and the lower chord are respectively provided with a temporary installation device; the middle connecting system, the upper plane connecting system and the lower plane connecting system are fixedly connected between the two groups of arched truss sheet sections. During erection, the cable crane lifts the lifting appliance to a set elevation; installing the truss sheet segment to be erected on the erected truss sheet segment through a temporary installation device; hanging and tensioning buckling ropes on the arch truss segment to be erected in a grading manner, transversely moving a cable crane into a bridge to hoist the middle connecting system and connect the middle connecting system between the upper arch truss segment frame and the lower arch truss segment frame, and finally splicing the upper plane connecting system and the lower plane connecting system by using the cable crane to form the arch truss segment. The invention realizes the erection of the arch bridge without the assembly of the support and improves the construction efficiency of the arch bridge.
Description
Technical Field
The invention relates to the technical field of steel arch bridge construction, in particular to a steel box truss type arch truss segment and a support-free assembling and erecting method thereof.
Background
With the rapid development of traffic engineering in recent years in China, a large-span bridge spanning the canyon terrain in mountainous areas is inevitably developed in large quantity, and a steel arch bridge is taken as a common bridge type, has the characteristics of high spanning capacity, high integral rigidity, good integral stability, small temperature deformation, attractive shape and the like, can be well combined with the canyon terrain, and becomes a main bridge type for the line spanning the canyon terrain.
The steel arch frames adopted by the arch bridge are generally assembled by a plurality of arch truss sections, and the assembly of the existing long-span steel truss type arch bridge generally comprises the following four methods: firstly, temporary supports are erected and assembled, but the problems of high support erecting difficulty, high cost, difficult rod piece transportation, long assembling period and the like exist when the temporary supports are erected in mountain valley areas; the second is a swivel method, which needs to set up splicing supports on both sides of the river valley, and has high construction cost, long construction period and high requirement on site conditions; thirdly, assembling by using an arch-mounted crane, needing to arrange a cable-stayed buckling and hanging system, and arranging the assembling crane on the arch, but the assembling crane has limited hoisting capacity, can only be assembled by scattered parts, has a large number of truss arch bars and has a long construction period; and fourthly, the cable crane is assembled in whole sections, the method needs to be provided with a cable-stayed buckling and hanging system and the cable crane, but the hoisting weight of the whole section is too large, and the cost of the cable crane is too high.
Disclosure of Invention
The invention aims to overcome the defects of high construction difficulty, high cost, long construction period and high construction cost of a large-span steel truss type arch bridge in the background technology, and provides a steel box truss type arch truss segment and a support-free assembling and erecting method thereof.
The invention provides in a first aspect a steel box truss type arch truss segment comprising:
the truss arch piece sections are arranged in two groups, the two groups of truss arch piece sections are parallel to each other and are arranged at intervals, each truss arch piece section comprises an upper chord and a lower chord, the upper chord and the lower chord are both of arc structures, the upper chord and the lower chord are fixedly connected through web members, and the end parts of the upper chord and the lower chord are respectively provided with a temporary mounting device which is used for connecting the adjacent truss arch sections;
the intermediate junction system, the fixed connection of intermediate junction system is between two sets of truss sections of encircleing, and the intermediate junction system includes stull, stull and vaulting pole down, go up stull, stull is connected between two sets of truss sections of encircleing down, the vaulting pole is connected between last stull and stull down, constitutes the triangle-shaped structure between vaulting pole and last stull, the stull down.
The preferred scheme is as follows: the temporary mounting device comprises a temporary matching piece and a guide plate, the temporary matching piece is fixedly connected to the two ends of the upper chord and the lower chord, the guide plate is fixedly connected to the front ends of the upper chord and the lower chord, and the temporary matching pieces of adjacent arch truss sections are fixedly connected through bolts.
The preferred scheme is as follows: the upper plane connecting system and the lower plane connecting system are parallel to each other and arranged at intervals, the upper plane connecting system is located above the lower plane connecting system, and the upper plane connecting system and the lower plane connecting system are fixedly connected with the arch truss sheet sections and the middle connecting system respectively.
The preferred scheme is as follows: the upper plane connecting system comprises an upper left flat connecting rod piece and an upper right flat connecting rod piece, one end of the upper left flat connecting rod piece is fixedly connected with the middle part of the upper cross brace through a bolt, the other end of the upper left flat connecting rod piece is fixedly connected with the upper chord on the left side through a bolt, one end of the upper right flat connecting rod piece is fixedly connected with the middle part of the upper cross brace through a bolt, and the other end of the upper right flat connecting rod piece is fixedly connected with the upper chord on the right side through a bolt;
the lower plane connecting system comprises a left lower flat connecting rod piece and a right lower flat connecting rod piece, one end of the left lower flat connecting rod piece is fixedly connected with the middle part of the lower cross brace through a bolt, the other end of the left lower flat connecting rod piece is fixedly connected with the left lower chord through a bolt, one end of the right lower flat connecting rod piece is fixedly connected with the middle part of the lower cross brace through a bolt, and the other end of the right lower flat connecting rod piece is fixedly connected with the right lower chord through a bolt.
The preferred scheme is as follows: the upper chord comprises a chord top plate, a chord bottom plate and a chord vertical plate, the chord top plate, the chord bottom plate and the chord vertical plate are connected end to form a rectangular structure, reinforcing ribs are welded on the inner walls of the chord top plate, the chord bottom plate and the chord vertical plate, and the structure of the lower chord is the same as that of the upper chord.
The invention provides a support-free assembling and erecting method of a steel box truss type arch truss segment, which comprises the following steps:
hoisting the arch truss segment to be erected to a set elevation by using a cable crane, and adjusting the posture of the arch truss segment to be erected to an installation state;
installing the truss sheet segment to be erected on the erected truss sheet segment through a temporary installation device;
hanging buckling cables on the arch truss sheet sections to be erected and stretching in a grading manner, hanging anchor cables corresponding to the buckling cables on a buckling tower in advance, and stretching the buckling cables and the anchor cables to keep the stress balance of the buckling tower;
after the erection of the arch truss sheet sections to be erected at the upstream and the downstream is finished, transversely moving a cable crane into a bridge, hoisting an intermediate connection system, and connecting the intermediate connection system between the arch truss sheet sections to be erected at the upstream and the downstream;
after the assembly of the intermediate connection system is completed, the cable crane sequentially hoists the upper plane connection system and the lower plane connection system, connects the upper plane connection system and the lower plane connection system between the arch truss sheet sections to be erected at the upstream and downstream, and assembles the arch truss sections;
and repeating the steps, and continuing to erect the subsequent arch truss sections to be erected until the arch truss sections are closed.
The preferred scheme is as follows: after the four sections of the arch truss sections are spliced, the line shapes of the arch truss sections are adjusted through the buckle cables and the anchor cables, arch hinge concrete is poured to perform arch hinge sealing operation, and the connection between the arch truss sections and the arch seats is changed into rigid connection from hinging.
The preferred scheme is as follows: after the arch truss sheet segment to be erected is lifted to the installation position, the inverted chain is utilized to pull the arch truss sheet segment to be erected, the arch truss sheet segment to be erected is butted with the erected arch truss sheet segment, the temporary installation device of the arch truss sheet segment to be erected is attached to the temporary installation device of the erected arch truss sheet segment, punching nails are driven into the temporary installation device to be aligned, and the temporary installation device is fixed through bolts.
The preferred scheme is as follows: the method comprises the following steps of hoisting the arch truss segment to be erected to a set elevation by using a cable crane:
transporting the arch truss sheet segment to be erected by using a transport ship, and transporting the arch truss sheet segment to be erected to a construction water area;
and the cable crane lowers the sling to the arch truss segment to be erected, and the arch truss segment to be erected is hung on the sling.
The preferred scheme is as follows: the lifting appliance comprises a front lifting hook and a rear lifting hook, wherein the cable crane firstly lifts the front lifting hook to lift the front end of the arch truss segment to be erected, a connecting line between the front lifting hook and the rear lifting hook and a lifting point of the arch truss segment to be erected is arranged above the center of the arch truss segment to be erected, then the cable crane lifts the rear lifting hook to lift the rear end of the arch truss segment to be erected, and finally the cable crane integrally lifts the arch truss segment to be erected to a set elevation.
On the basis of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention relates to a steel box truss type arch truss segment which is provided with an arch truss sheet segment, a middle connecting system, an upper plane connecting system and a lower plane connecting system which jointly form the arch truss segment. The arched truss segment comprises an upper chord, a lower chord and web members, and temporary mounting devices are arranged at the ends of the upper chord and the lower chord and used for connecting adjacent arched truss segments. After the arch truss segment to be erected is hung to the installation position, the temporary installation device is used for butt joint and locking to complete temporary connection of the arch truss segment to be erected, the anchor cable is hung and tensioned, and after the cable crane is unhooked, the intermediate connection system and the upper and lower plane connection system rod pieces are installed. The structure and the erection method thereof improve the assembling efficiency of the arch truss segment.
The invention discloses a support-free assembling and erecting method of a steel box truss type arch truss segment. The method comprises the steps that firstly, an arch truss sheet segment to be erected is transported to a construction water area by a transport ship, a lifting appliance of a cable crane is lifted after being hooked, the lifting appliance adjusts the posture of the arch truss sheet segment to be erected in the air, and the arch truss sheet segment to be erected is butted and locked through a temporary installation device after being lifted to an installation position, so that the temporary connection of the arch truss sheet segment to be erected is completed; then, hanging and tensioning the buckle cable, and gradually loosening the hook of the lifting appliance; after the erection of the arch truss sheet sections to be erected on the upper and lower streams is finished, mounting an intermediate connecting system, an upper plane connecting system and a lower plane connecting system; after the four segments are installed, the line shape is finely adjusted, arch hinge sealing is carried out, system conversion is completed, and then subsequent segment erection is carried out. The invention adopts the buckling and hanging system for erection and shipping to the site, overcomes the technical problem of construction of the large-span arch bridge under complex terrain conditions of mountainous areas, valleys and the like, realizes the erection of the arch bridge without support assembly, reduces the influence on river channels and improves the construction efficiency of the arch bridge.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic view of a cable crane suspending a truss segment to be erected in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of a cable crane lifting a truss sheet segment to be erected in accordance with an embodiment of the present invention;
fig. 4 is a schematic view of a truss sheet segment to be erected according to an embodiment of the invention being spliced to an erected truss sheet segment by temporary mounting means;
FIG. 5 is a schematic view of a temporary mounting apparatus of an embodiment of the present invention;
FIG. 6 is a schematic view of the structure of FIG. 4 taken along the direction 1-1;
FIG. 7 is a front view of a truss sheet segment according to an embodiment of the invention;
FIG. 8 is a right side view of a truss sheet segment of an embodiment of the invention;
FIG. 9 is a top plan view of a truss sheet segment in accordance with an embodiment of the invention;
fig. 10 is a bottom view of a truss sheet segment in accordance with an embodiment of the invention.
Reference numerals: 1-truss section, 2-intermediate connection system, 3-transport ship, 4-front hook, 5-rear hook, 6-buckle cable, 7-anchor cable, 8-buckle tower, 9-temporary matching member, 10-guide plate, 11-upper chord, 12-lower chord, 13-web member, 21-upper cross brace, 22-lower cross brace, 23-brace, 31-upper left flat link member, 32-upper right flat link member, 41-lower left flat link member, 42-lower right flat link member, 111-chord top plate, 112-chord bottom plate, 113-chord vertical plate and 114-reinforcing rib.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. It is to be noted that all the figures are exemplary representations. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Example 1
Referring to fig. 7 and 8, an embodiment of the present invention provides a steel box truss type arch truss section including:
encircle purlin piece subsection 1, this encircle purlin piece subsection 1 and be equipped with two sets ofly, two sets of purlin piece subsections 1 that encircle are parallel to each other and the interval sets up, encircle purlin piece subsection 1 and include upper chord 11 and lower chord 12, and upper chord 11 and lower chord 12 are the arc structure. The upper chord 11 and the lower chord 12 are fixedly connected through a web member 13, a plurality of web members 13 are arranged between the upper chord 11 and the lower chord 12, and the web members 13, the upper chord 11 and the lower chord 12 are spliced into an isosceles triangle structure.
Temporary mounting means are provided at the ends of the upper and lower chords 11, 12 for connecting adjacent truss sections. The temporary mounting device comprises a temporary matching piece 9 and a guide plate 10, wherein the temporary matching piece 9 is fixedly connected with two ends of an upper chord 11 and a lower chord 12 of the arched truss sheet segment 1, and the guide plate 10 is fixedly connected with the front ends of the upper chord 11 and the lower chord 12. The truss sheet segment 1 to be erected and the truss sheet segment 1 already erected are aligned by utilizing the guide plate 10, and the temporary matching piece 9 of the truss sheet segment 1 to be erected and the temporary matching piece 9 of the truss sheet segment 1 already erected are fixedly connected through a bolt, so that the truss sheet segment to be erected and the truss sheet segment already erected are fixedly connected.
The intermediate connecting system 2 is fixedly connected between the two groups of arched truss sheet sections 1. The intermediate linkage 2 comprises an upper cross brace 21, a lower cross brace 22 and a brace 23. The upper cross brace 21 and the lower cross brace 22 are connected between the two groups of arched truss sheet sections 1, wherein the upper cross brace 21 is connected between the upper chords 11 of the two groups of arched truss sheet sections 1; the lower cross brace 22 is connected between the lower chords 12 of the two sets of truss sheet sections 1. The stay bar 23 is connected between the upper cross brace 21 and the lower cross brace 22, and a triangular structure is formed among the stay bar 23, the upper cross brace 21 and the lower cross brace 22, so that the structural strength of the arch truss sheet segments 1 at the upstream and the downstream is improved.
Example 2
Referring to fig. 7 and 8, an embodiment of the present invention provides a steel box truss type arch truss segment, which is different from embodiment 1 in that: the upper plane connecting system and the lower plane connecting system are parallel to each other and arranged at intervals, the upper plane connecting system is located above the lower plane connecting system, and the upper plane connecting system and the lower plane connecting system are fixedly connected with the arch truss sheet sections 1 and the middle connecting system 2 respectively.
Specifically, the upper plane connecting system includes a left upper flat connecting rod 31 and a right upper flat connecting rod 32, one end of the left upper flat connecting rod 31 is fixedly connected with the middle of the upper cross brace 21 through a bolt, and the other end of the left upper flat connecting rod 31 is fixedly connected with the left upper chord 11 through a bolt. One end of the upper right flat link member 32 is fixedly connected with the middle part of the upper cross brace 21 through a bolt, and the other end of the upper right flat link member 32 is fixedly connected with the upper chord 11 on the right side through a bolt.
The lower plane connecting system comprises a left lower flat link member 41 and a right lower flat link member 42, one end of the left lower flat link member 41 is fixedly connected with the middle part of the lower cross brace 22 through a bolt, and the other end of the left lower flat link member 41 is fixedly connected with the left lower chord 12 through a bolt. One end of the right lower horizontal link member 42 is fixedly connected with the middle part of the lower cross brace 22 through a bolt, and the other end of the right lower horizontal link member 42 is fixedly connected with the right lower chord 12 through a bolt.
Example 3
Referring to fig. 6, an embodiment of the present invention provides a steel box truss type arch truss segment, which is different from embodiment 1 in that: the upper chord 11 comprises a chord top plate 111, a chord bottom plate 112 and a chord vertical plate 113, and the chord top plate 111, the chord bottom plate 112 and the chord vertical plate 113 are connected end to form a hollow rectangular structure. Reinforcing ribs 114 are welded to the inner walls of the chord top plate 111, the chord bottom plate 112, and the chord riser 113. The lower chord 12 has the same structure as the upper chord 11.
Example 4
Referring to fig. 1, an embodiment of the present invention provides a method for assembling and erecting a truss section of a steel box truss-type arch truss without a support, including the following steps:
And 2, as shown in fig. 2, tensioning a main cable on the top of the buckling tower 8, arranging the main cable along the longitudinal bridge direction, moving a cable crane on the main cable, lowering a lifting appliance to the arch truss segment 1 to be erected by the cable crane, and hanging the arch truss segment 1 to be erected on the lifting appliance.
And 3, referring to fig. 3, lifting the lifting appliance by the cable crane, lifting the arch truss segment 1 to be erected to a set elevation, and adjusting the posture of the arch truss segment 1 to be erected to an installation state.
And 6, referring to fig. 8, after the erection of the arch truss sheet segments 1 to be erected at the upstream and downstream sides is completed, transversely moving a cable crane into the bridge, hoisting the intermediate connecting system 2, and connecting the intermediate connecting system 2 between the arch truss sheet segments 1 to be erected at the upstream and downstream sides.
And 7, as shown in fig. 9 and 10, after the assembly of the intermediate connecting system 2 is completed, sequentially hoisting the upper plane connecting system and the lower plane connecting system by using the cable crane, connecting the upper plane connecting system and the lower plane connecting system between the arch truss sheet segments (1) to be erected at the upstream and the downstream, and assembling the arch truss segments.
And 8, repeating the steps, and continuing to erect the subsequent arch truss sections to be erected until closure.
Principle of operation
The invention provides a support-free assembling and erecting method for steel box truss type arch truss sections. The method comprises the steps that firstly, an arch truss sheet segment 1 to be erected is transported to a construction water area by a transport ship 3, a sling of a cable crane is hooked and then hoisted, the sling adjusts the posture of the arch truss sheet segment 1 to be erected in the air, the arch truss sheet segment 1 to be erected is hoisted to an installation position, and then is butted and locked through a temporary installation device, so that the arch truss sheet segment 1 to be erected is temporarily connected with the erected arch truss sheet segment 1; then, the buckle cable 6 is hung and tensioned, and the hanger gradually loosens the hook. After the erection of the arch truss sheet sections 1 to be erected at the upstream and the downstream is finished, installing and assembling an intermediate connecting system 2 into the arch truss sections; until the truss sections close. The invention adopts a buckling and hanging system for erection, and the transport ship 3 transports the arch truss segment 1 to be erected to the site, thereby overcoming the technical problem of construction of the large-span arch bridge under complex terrain conditions such as mountainous areas, valleys and the like, realizing the erection of the arch bridge without support assembly, reducing the influence on river channels and improving the construction efficiency of the arch bridge.
Example 5
Referring to fig. 2 and 3, an embodiment of the present invention provides a method for erecting a truss-type steel box truss arch truss section by a support-free assembly method, which is different from embodiment 3 in that: the hanger comprises a front lifting hook 4 and a rear lifting hook 5, the cable crane firstly lifts the front lifting hook 4 to lift the front end of the arch truss segment 1 to be erected, and a connecting line between the front lifting hook 4 and the rear lifting hook 5 and a lifting point of the arch truss segment 1 to be erected is arranged on the center of the arch truss segment 1 to be erected, so that the arch truss segment 1 to be erected is ensured not to overturn in the hoisting process. And then the cable crane lifts the rear lifting hook 5 to lift the rear end of the arch truss segment 1 to be erected, and finally the cable crane integrally lifts the arch truss segment 1 to be erected to a set elevation.
Example 6
The embodiment of the invention provides a support-free assembling and erecting method for steel box truss type arch truss sections, which is different from the embodiment 3 in that: after the arch truss sections are spliced into four sections, the line shapes of the erected arch truss sections are adjusted through the buckle cables 6 and the anchor cables 7, after the line shapes of the arch truss sections are consistent with the designed line shapes, arch hinge concrete is poured to perform arch hinge sealing operation, and the connection between the arch trusses and the arch seats is changed into rigid connection from hinge connection.
Example 7
Referring to fig. 5 and 6, an embodiment of the present invention provides a method for erecting a truss-type steel box arch truss section without a support, which is different from embodiment 3 in that: after the truss arch piece segment 1 to be erected is lifted to the installation position, the truss arch piece segment 1 to be erected is pulled by using an inverted chain, the truss arch piece segment 1 to be erected is butted with the erected truss arch piece segment 1, a temporary installation device at the end part of the truss arch piece segment 1 to be erected is attached to a temporary installation device at the end part of the erected truss arch piece segment 1, punching nails are driven into holes of the temporary installation device at the end part of the truss arch piece segment 1 to be erected and the temporary installation device at the end part of the erected truss arch piece segment 1 to align, bolts penetrate into installation holes of the temporary installation device at the end part of the truss arch piece segment 1 to be erected and the temporary installation device at the end part of the erected truss arch piece segment 1, and the temporary installation devices are fixed by using the bolts.
Various modifications and variations of the embodiments of the present invention may be made by those skilled in the art, and they are also within the scope of the present invention, provided they are within the scope of the claims of the present invention and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (10)
1. A steel box truss arch truss section comprising:
the truss arch segment comprises truss arch segment sections (1), wherein the truss arch segment sections (1) are provided with two groups, the two groups of truss arch segment sections (1) are parallel to each other and arranged at intervals, each truss arch segment section (1) comprises an upper chord (11) and a lower chord (12), the upper chord (11) and the lower chord (12) are both of arc structures, the upper chord (11) and the lower chord (12) are fixedly connected through a web member (13), and the end parts of the upper chord (11) and the lower chord (12) are provided with temporary mounting devices which are used for connecting adjacent truss arch segments;
intermediate junction is (2), intermediate junction is (2) fixed connection between two sets of purlin section sections of encircleing (1), and intermediate junction is (2) including stull (21), stull (22) and vaulting pole (23) down, go up stull (21), stull (22) are connected between two sets of purlin section of encircleing (1) down, vaulting pole (23) are connected between last stull (21) and stull (22) down, constitute the triangle-shaped structure between vaulting pole (23) and last stull (21), stull (22) down.
2. A steel box truss arch truss section as defined in claim 1 wherein:
the temporary mounting device comprises a temporary matching piece (9) and a guide plate (10), wherein the temporary matching piece (9) is fixedly connected to the two ends of an upper chord (11) and a lower chord (12), the guide plate (10) is fixedly connected to the front ends of the upper chord (11) and the lower chord (12), and the temporary matching pieces (9) of adjacent arch truss sections are fixedly connected through bolts.
3. A steel box truss arch truss section as defined in claim 1 wherein:
the upper plane connecting system and the lower plane connecting system are parallel to each other and arranged at intervals, the upper plane connecting system is located above the lower plane connecting system, and the upper plane connecting system and the lower plane connecting system are fixedly connected with the arch truss sheet sections (1) and the middle connecting system (2) respectively.
4. A steel box truss arch truss section as defined in claim 3 wherein:
the upper plane connecting system comprises a left upper flat connecting rod piece (31) and a right upper flat connecting rod piece (32), one end of the left upper flat connecting rod piece (31) is fixedly connected with the middle part of the upper cross brace (21) through a bolt, the other end of the left upper flat connecting rod piece (31) is fixedly connected with the upper chord (11) on the left side through a bolt, one end of the right upper flat connecting rod piece (32) is fixedly connected with the middle part of the upper cross brace (21) through a bolt, and the other end of the right upper flat connecting rod piece (32) is fixedly connected with the upper chord (11) on the right side through a bolt;
the lower plane connecting system comprises a left lower flat connecting rod piece (41) and a right lower flat connecting rod piece (42), one end of the left lower flat connecting rod piece (41) is connected with the middle of the lower cross brace (22) through a bolt fixedly, the other end of the left lower flat connecting rod piece (41) is connected with the left lower chord (12) through a bolt fixedly, one end of the right lower flat connecting rod piece (42) is connected with the middle of the lower cross brace (22) through a bolt fixedly, and the other end of the right lower flat connecting rod piece (42) is connected with the right lower chord (12) through a bolt fixedly.
5. A steel box truss arch truss section as defined in claim 1 wherein:
go up chord (11) and include chord roof (111), chord bottom plate (112) and chord riser (113), chord roof (111), chord bottom plate (112) and chord riser (113) end to end connect and enclose into the rectangle structure, all welded on the inner wall of chord roof (111), chord bottom plate (112) and chord riser (113) has stiffening rib (114), the structure of lower chord (12) is the same with the structure of last chord (11).
6. A support-free assembling and erecting method for steel box truss type arch truss sections is characterized by comprising the following steps:
hoisting the arch truss sheet segment (1) to be erected to a set elevation by using a cable crane, and adjusting the posture of the arch truss sheet segment (1) to be erected to an installation state;
installing the truss sheet segment (1) to be erected on the erected truss sheet segment (1) through a temporary installation device;
hanging and stretching buckling cables (6) on the arch truss sheet sections (1) to be erected in a grading manner, hanging anchor cables (7) corresponding to the buckling cables (6) on buckling towers (8) in advance, and keeping stress balance of the buckling towers (8) by stretching the buckling cables (6) and the anchor cables (7);
after the arch truss sheet segments (1) to be erected on the upstream and the downstream are erected, the cable crane moves transversely into the bridge to hoist the intermediate connection system (2), and the intermediate connection system (2) is connected between the arch truss sheet segments (1) to be erected on the upstream and the downstream;
after the middle connection system (2) is assembled, the cable crane sequentially hoists the upper plane connection system and the lower plane connection system, and the upper plane connection system and the lower plane connection system are connected between the arch truss sheet sections (1) to be erected at the upstream and the downstream to be assembled into arch truss sections;
and repeating the steps, and continuing to erect the subsequent arch truss sections to be erected until the arch truss sections are closed.
7. The method for erecting a steel box truss type arch truss section by splicing without supports as claimed in claim 6, wherein:
after the four sections of the arch truss sections are spliced, the line shapes of the arch truss sections are adjusted through the buckle cables (6) and the anchor cables (7), arch hinge concrete is poured to perform arch hinge sealing operation, and the connection between the arch truss sections and the arch seats is changed into rigid connection from hinge connection.
8. The method for erecting a steel box truss type arch truss section by splicing without supports as claimed in claim 6, wherein:
after the arch truss sheet segment (1) to be erected is lifted to the installation position, the inverted chain is utilized to pull the arch truss sheet segment (1) to be erected, the arch truss sheet segment (1) to be erected is butted with the erected arch truss sheet segment (1), a temporary installation device of the arch truss sheet segment (1) to be erected is attached to a temporary installation device of the erected arch truss sheet segment (1), punching nails are driven into the temporary installation device to be aligned, and the temporary installation device is fixed through bolts.
9. The method for erecting a steel box truss type arch truss section by splicing without supports as claimed in claim 6, wherein:
the method is characterized by further comprising the following steps of hoisting the arched truss piece segment (1) to be erected to a set elevation by using a cable crane:
transporting the arch truss sheet segment (1) to be erected by using a transport ship (3), and transporting the arch truss sheet segment (1) to be erected to a construction water area;
the cable crane lowers the sling to the arch truss segment (1) to be erected, and the arch truss segment (1) to be erected is hung on the sling.
10. The method of erecting a steel box truss type arch truss section by a support-free assembly as claimed in claim 9, wherein:
the lifting appliance comprises a front lifting hook (4) and a rear lifting hook (5), wherein the front lifting hook (4) is firstly lifted by a cable crane, the front end of an arch truss segment (1) to be erected is lifted, a connecting line between the front lifting hook (4) and the rear lifting hook (5) and a lifting point of the arch truss segment (1) to be erected is arranged on the center of the arch truss segment (1) to be erected, then the rear lifting hook (5) is lifted by the cable crane, the rear end of the arch truss segment (1) to be erected is lifted, and finally the arch truss segment (1) to be erected is integrally lifted by the cable crane to a set elevation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010177968.7A CN111350123A (en) | 2020-03-13 | 2020-03-13 | Steel box truss type arch truss segment and support-free assembling and erecting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010177968.7A CN111350123A (en) | 2020-03-13 | 2020-03-13 | Steel box truss type arch truss segment and support-free assembling and erecting method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525091A (en) * | 2020-11-04 | 2021-03-19 | 中铁大桥局第七工程有限公司 | Construction method integrating installation, positioning and monitoring of steel box truss arch bridge |
| CN113774780A (en) * | 2021-09-06 | 2021-12-10 | 四川省公路规划勘察设计研究院有限公司 | Segment unit of super-large span concrete-filled steel tube arch bridge and arch bridge |
| CN114837066A (en) * | 2022-05-19 | 2022-08-02 | 保利长大工程有限公司 | High-altitude cable tower beam construction bracket with external prestress and installation method |
| CN114875769A (en) * | 2021-07-22 | 2022-08-09 | 长沙理工大学 | Prefabricated hollow sandwich concrete-filled steel tube arch bridge and construction method thereof |
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2020
- 2020-03-13 CN CN202010177968.7A patent/CN111350123A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525091A (en) * | 2020-11-04 | 2021-03-19 | 中铁大桥局第七工程有限公司 | Construction method integrating installation, positioning and monitoring of steel box truss arch bridge |
| CN114875769A (en) * | 2021-07-22 | 2022-08-09 | 长沙理工大学 | Prefabricated hollow sandwich concrete-filled steel tube arch bridge and construction method thereof |
| CN113774780A (en) * | 2021-09-06 | 2021-12-10 | 四川省公路规划勘察设计研究院有限公司 | Segment unit of super-large span concrete-filled steel tube arch bridge and arch bridge |
| CN114837066A (en) * | 2022-05-19 | 2022-08-02 | 保利长大工程有限公司 | High-altitude cable tower beam construction bracket with external prestress and installation method |
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