CN114790693A - Construction method of large-span river-crossing steel truss bridge structure - Google Patents
Construction method of large-span river-crossing steel truss bridge structure Download PDFInfo
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- CN114790693A CN114790693A CN202210429944.5A CN202210429944A CN114790693A CN 114790693 A CN114790693 A CN 114790693A CN 202210429944 A CN202210429944 A CN 202210429944A CN 114790693 A CN114790693 A CN 114790693A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 72
- 239000010959 steel Substances 0.000 title claims abstract description 72
- 238000010276 construction Methods 0.000 title claims abstract description 39
- 230000002787 reinforcement Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000009415 formwork Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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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
- E01D6/00—Truss-type bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- General Engineering & Computer Science (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method of a large-span river-crossing steel truss bridge structure, which solves the problem that a large-scale hoisting machine cannot be used for hoisting due to the limitation of working conditions, saves the cost and shortens the construction period compared with the construction of a bridge girder erection machine with high complexity. And the overwater supporting platform is formed by the steel pipe piles to serve as temporary support, the required construction equipment is simple, the applicability is strong, the supporting platform can be constructed in advance, the construction period can be guaranteed, the steel pipe piles can be repeatedly used, and the economical efficiency is good. The invention solves the problems of long construction period and high cost in the conventional construction method for constructing the large-span river-crossing steel truss bridge.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a large-span river-crossing steel truss bridge structure.
Background
For the construction of a large-span river-crossing steel truss bridge structure, the whole hoisting of a large hoisting machine is generally adopted or the construction is carried out by using a professional bridge girder erection machine. The method adopts large-scale hoisting machinery for hoisting, generally, after the truss sections are assembled on site, a large-scale hoisting machinery station is used for hoisting on the riverside or the finished structure, the method needs a large component assembling site, the requirement on the structural bearing capacity of the hoisting machinery station site is high, and if the large-scale hoisting machinery station is erected on the finished structure, the structure needs to be subjected to stress checking and jacked back for reinforcement. The bridge girder erection machine equipment is adopted for construction, special bridge girder erection machine equipment needs to be selected, the mounting and dismounting period of the bridge girder erection machine is long, the technical difficulty is high, the requirement on operators is high, the construction period is prolonged to a certain extent, and the construction cost is increased. The conventional construction method has high requirements on construction conditions, is not beneficial to shortening the construction period, has high cost and limited application range.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
In order to overcome the defects in the prior art, a construction method of a large-span river-crossing steel truss bridge structure is provided so as to solve the problems of long construction period and high cost in the conventional construction method for constructing the large-span river-crossing steel truss bridge.
In order to realize the purpose, the construction method of the large-span river-crossing steel truss bridge structure comprises the following steps:
dividing a large-span river-crossing steel truss bridge structure into two shore-facing sections and two-span middle sections;
driving four steel pipe piles in the middle of the river channel, so that the four steel pipe piles are arranged in a matrix form;
connecting a tie frame between the upper parts of two adjacent steel pipe piles;
laying top beams on two steel pipe piles on two opposite sides of the erection direction of the large-span river-crossing steel truss bridge structure respectively;
laying Bailey supporting frames on the top beams on two opposite sides of the erection direction;
laying supporting section steel on two opposite sides of the Bailey supporting frame to form an overwater supporting platform;
respectively pouring pier columns on two banks of the river channel;
assembling the pier columns to form a shore facing section, so that the shore facing sections on the pier columns of the two banks extend towards the above-water supporting platform;
laying a substrate on the bank facing section, so that the substrate is arranged along the length direction of the bank facing section;
running a hoisting machine on the substrate to hoist the midspan member;
assembling the two opposite sides of the above-water supporting platform and the adjacent shore sections of the two banks to form the midspan section;
and folding the two midspans to form the large-span river-crossing steel truss bridge structure and dismantling the above-water supporting platform.
Further, the bank facing section comprises a truss lower chord box girder, a truss upper chord box girder, a web member, a cross brace and a truss outer cantilever girder, and the step of assembling the bank facing section comprises the following steps:
hoisting and installing the truss lower chord box girder to the pier stud;
a plurality of web members are vertically arranged on two opposite sides of the truss lower chord box girder respectively, and are arranged along the length direction of the truss lower chord box girder;
mounting the truss upper chord box girder to a plurality of web members;
installing the cross brace between the truss upper chord box girder and the truss lower chord box girder;
and installing the truss outer cantilever beam on the outer sides of the truss upper-chord box girder and the truss lower-chord box girder to form the shore facing section.
Further, the step of respectively pouring the pier studs on the two banks of the river comprises the following steps:
binding pier column reinforcement cages at the two banks;
installing a pier column template outside the pier column reinforcement cage;
installing an embedded part at the top of the pier stud reinforcement cage;
pouring concrete in the pier stud formwork to form the pier stud;
and after the strength of the pier column meets the design requirement, a conversion support is arranged on the embedded part at the top of the pier column.
Further, the length of the bailey support frame is larger than the width of the midspan section.
Furthermore, the four steel pipe piles are respectively arranged on the outer sides of the midspan sections.
The construction method of the large-span river-crossing steel truss bridge structure has the advantages that the problem that a large-scale hoisting machine cannot be used for hoisting due to working condition limitation is solved, and compared with construction of a bridge girder erection machine with high complexity, cost is saved, and construction period is shortened. And the overwater supporting platform is formed by the steel pipe piles to serve as temporary support, required construction equipment is simple, the applicability is strong, the supporting platform can be constructed in advance, the construction period can be guaranteed, the steel pipe piles can be repeatedly used, and the economical efficiency is good.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic structural view of a long-span river-crossing steel truss bridge structure according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a mid-span folding part of a long-span river-crossing steel truss bridge structure according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of an aquatic support platform according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of a bailey support according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1 to 4, the invention provides a construction method of a large-span river-crossing steel truss bridge structure, wherein the large-span river-crossing steel truss bridge structure comprises a truss lower chord box girder 11, a truss upper chord box girder 12, web members 13, shear braces 14 and a truss outer cantilever girder 15.
Specifically, referring to fig. 1 and 2, the truss upper-chord box girder 12 is disposed in the same direction as the truss lower-chord box girder 11, and the truss upper-chord box girder 12 is disposed above the truss lower-chord box girder 11. A plurality of web members 13 are connected between the truss upper chord box girder 12 and the truss lower chord box girder 11. In addition, a cross brace 14 is connected between the truss upper-chord box girder 12 and the truss lower-chord box girder 11. And a truss outer cantilever beam 15 is connected to the outer sides of the truss upper chord box beam 12 and the truss lower chord box beam 11. The upper part of the truss outer cantilever beam 15 is connected with the truss upper chord box beam 12, and the lower part of the truss outer cantilever beam 15 is connected with the truss lower chord box beam 11. Referring to fig. 2, the cross section of the large-span river-crossing steel truss bridge structure is in an inverted trapezoid shape as a whole.
The invention relates to a construction method of a long-span river-crossing steel truss bridge structure, which comprises the following steps:
s1: the large-span river-crossing steel truss bridge structure is divided into two bank facing sections and two cross middle sections 1.
In this embodiment, the long-span river-crossing steel truss bridge structure is divided into four sections in the length direction thereof, including two adjacent shore sections and two cross middle sections 1. The structure of the shore segment is the same as that of the midspan segment 1. One end of the two midspan sections are coaxially connected, and the shore section is connected to the other end of the midspan section. The midspan section is arranged on the water surface of the river channel, and the shore section is arranged on the shore of the river channel.
S2: and driving four steel pipe piles in the middle of the river channel to enable the four steel pipe piles to be arranged in a matrix form.
In this embodiment, four steel pipe piles are driven in the middle of the river, i.e., at the folding position of the two midspans. The four steel pipe piles are arranged in a matrix manner. Four steel-pipe piles are pairwise one set, two sets of steel-pipe piles are respectively arranged on two opposite sides of the erection route of the large-span river-crossing steel truss bridge, and the distance between the two sets of steel-pipe piles is larger than the width of the large-span river-crossing steel truss bridge. And during subsequent dismantling, other bridges can be prevented from being shielded.
S3: and connecting a tie frame between the upper parts of the two adjacent steel pipe piles.
The drawknot frame comprises two cross rods and an inclined stay bar. Wherein, two horizontal poles are connected between the upper portions of two adjacent steel-pipe piles. The diagonal brace is obliquely connected between two adjacent steel pipe piles and arranged between the two cross rods.
In this embodiment, the end of the diagonal brace is connected to the intersection of the cross bar and the steel pipe pile.
S4: and respectively laying top beams on two steel pipe piles on two opposite sides of the erection direction of the large-span river-crossing steel truss bridge structure.
S5: and laying Bailey supporting frames on top beams on two opposite sides in the erecting direction.
S6: and laying bearing section steel on two opposite sides of the Bailey bracing frame to form the overwater supporting platform 2.
The bailey supports (namely the bailey supports) are arranged on the top beams, and bailey pieces in the bailey supports are firmly fastened, so that the overwater supporting platform is formed into a stable whole.
Laying support section steel on the Bailey truss along the erection direction of the large-span river-crossing steel truss bridge (namely the length direction of the large-span river-crossing steel truss bridge), and installing and unloading section steel at two ends of the support section steel.
S7: and respectively pouring pier columns on two banks of the river channel.
Specifically, step S7 includes:
s71, binding pier column reinforcement cages on both banks;
s72, installing a pier column template outside the pier column reinforcement cage;
s73, installing an embedded part on the top of the pier stud reinforcement cage;
s74, pouring concrete in the pier stud template to form the pier stud;
and S75, placing a conversion support in the embedded part at the top of the pier column after the strength of the pier column meets the design requirement.
The elevation of the conversion manufacture is flush with the bottom elevation of the long-span river-crossing steel truss bridge.
S8: assemble in the pier stud and form and face the bank section for face bank section on the pier stud of both banks and extend the setting towards supporting platform 2 on water.
Specifically, the step of assembling the shore segment comprises:
s81, hoisting and installing the truss lower chord box girder to a pier stud;
s82, vertically installing a plurality of web members on two opposite sides of the truss lower chord box girder, wherein the web members are arranged along the length direction of the truss lower chord box girder;
s83, mounting the truss upper chord box girder on a plurality of web members;
s84, installing a cross brace between the truss upper chord box girder and the truss lower chord box girder;
and S85, mounting the truss outer cantilever beam on the outer sides of the truss upper-chord box girder and the truss lower-chord box girder to form a shore facing section.
S9: and laying a substrate on the bank facing section, so that the substrate is arranged along the length direction of the bank facing section.
S10: the hoisting machine is driven on the base plate to hoist the members across the middle section 1.
S11: the two opposite sides of the overwater supporting platform 2 and the adjacent shore sections of the two banks are respectively assembled to form a midspan section 1.
S12: and folding the two-span middle section 1 to form a large-span river-crossing steel truss bridge structure and dismantling the overwater supporting platform 2.
And laying base plates on the two installed adjacent shore sections, wherein the base plates are used for the traveling of hoisting machinery such as a crane and the like. And the crane synchronously and symmetrically hoists the two midspan sections on the two finished shore sections.
Wherein, the assembling steps of the midspan section and the shoreside section are the same. One end of the truss lower chord box girder spanning the middle section is butted with the truss lower chord box girder of the installed shore section, the other end of the truss lower chord box girder spanning the middle section is erected on unloading section steel of the supporting section steel of the water supporting platform, and then other components are installed to complete the communication of the truss lower chord box girder of the large-span river-crossing steel truss bridge structure. And as above, sequentially installing the midspan web member, the truss upper chord box girder, the cross braces and the truss overhanging steel girder, and finally completing the folding of the large-span river-crossing steel truss bridge structure.
The construction method of the long-span river-crossing steel truss bridge structure solves the problem that large-scale hoisting machinery cannot be used for hoisting due to the limitation of working conditions, saves the cost and shortens the construction period compared with the construction of a bridge girder erection machine with high complexity. And the overwater supporting platform is formed by the steel pipe piles to serve as temporary support, required construction equipment is simple, the applicability is strong, the supporting platform can be constructed in advance, the construction period can be guaranteed, the steel pipe piles can be repeatedly used, and the economical efficiency is good.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (5)
1. A construction method of a large-span river-crossing steel truss bridge structure is characterized by comprising the following steps:
dividing a large-span river-crossing steel truss bridge structure into two bank facing sections and two span middle sections;
driving four steel pipe piles in the middle of the river channel, so that the four steel pipe piles are arranged in a matrix form;
connecting a tie frame between the upper parts of two adjacent steel pipe piles;
laying top beams on two steel pipe piles on two opposite sides of the erection direction of the large-span river-crossing steel truss bridge structure respectively;
laying bailey supports on the top beams on two opposite sides of the erection direction;
laying supporting section steel on two opposite sides of the Bailey supporting frame to form an overwater supporting platform;
respectively pouring pier columns on two banks of the river channel;
assembling the pier columns to form a shore facing section, so that the shore facing sections on the pier columns of the two banks extend towards the above-water supporting platform;
laying a substrate on the bank facing section, so that the substrate is arranged along the length direction of the bank facing section;
running a hoisting machine on the substrate to hoist the midspan member;
assembling the two opposite sides of the above-water supporting platform and the adjacent shore sections of the two banks to form the midspan section;
and folding the two midspans to form the large-span river-crossing steel truss bridge structure and dismantling the above-water supporting platform.
2. The construction method of the long-span river-crossing steel truss bridge structure according to claim 1, wherein the shore segment comprises a truss lower chord box girder, a truss upper chord box girder, a web member, a shear brace and a truss outer cantilever girder, and the assembling the shore segment comprises:
hoisting and mounting the truss lower chord box girder to the pier stud;
a plurality of web members are vertically arranged on two opposite sides of the truss lower chord box girder respectively, and are arranged along the length direction of the truss lower chord box girder;
mounting the truss upper chord box girder to a plurality of web members;
installing the cross brace between the truss upper chord box girder and the truss lower chord box girder;
and installing the truss outer cantilever beam on the outer sides of the truss upper-chord box girder and the truss lower-chord box girder to form the shore facing section.
3. The construction method of the long-span river-crossing steel truss bridge structure of claim 1, wherein the step of respectively casting pier columns at both sides of the river comprises:
binding pier column reinforcement cages on the two banks;
installing a pier column template outside the pier column reinforcement cage;
installing an embedded part at the top of the pier stud reinforcement cage;
pouring concrete in the pier stud formwork to form the pier stud;
and after the strength of the pier column meets the design requirement, a conversion support is arranged on the embedded part at the top of the pier column.
4. The construction method of the long-span river-crossing steel truss bridge structure of claim 1, wherein the length of the bailey bracing frame is greater than the width of the midspan section.
5. The construction method of the long-span river-crossing steel truss bridge structure according to claim 4, wherein four steel pipe piles are respectively arranged on the outer sides of the midspan sections.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210429944.5A CN114790693B (en) | 2022-04-22 | 2022-04-22 | Construction method of large-span river-crossing steel truss bridge structure |
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| CN202210429944.5A CN114790693B (en) | 2022-04-22 | 2022-04-22 | Construction method of large-span river-crossing steel truss bridge structure |
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| CN114790693A true CN114790693A (en) | 2022-07-26 |
| CN114790693B CN114790693B (en) | 2024-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030010A (en) * | 2022-07-28 | 2022-09-09 | 山东华亿钢机股份有限公司 | Combined steel bridge structure system and its installation and construction method |
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| CN112681135A (en) * | 2020-12-14 | 2021-04-20 | 中铁二十局集团第三工程有限公司 | Construction method of n-shaped sea-crossing temporary steel trestle |
| CN113136803A (en) * | 2021-04-19 | 2021-07-20 | 中交第三公路工程局有限公司 | River-crossing steel truss bridge closure method |
| CN113652977A (en) * | 2021-09-24 | 2021-11-16 | 中国十九冶集团有限公司 | Main beam mounting method of river-crossing steel box girder bridge |
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2022
- 2022-04-22 CN CN202210429944.5A patent/CN114790693B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102146660A (en) * | 2011-02-25 | 2011-08-10 | 中交四航局第一工程有限公司 | Installation methods of cross-arch-rib gantry crane and butterfly arch bridge space structure system |
| JP2015190122A (en) * | 2014-03-27 | 2015-11-02 | 株式会社竹中工務店 | Beam-like member construction method |
| CN111764282A (en) * | 2020-05-19 | 2020-10-13 | 中交二航局第二工程有限公司 | Rigid suspension cable stiffening steel truss bridge construction method based on inclined pull buckling hanging method |
| CN112681135A (en) * | 2020-12-14 | 2021-04-20 | 中铁二十局集团第三工程有限公司 | Construction method of n-shaped sea-crossing temporary steel trestle |
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| CN115030010A (en) * | 2022-07-28 | 2022-09-09 | 山东华亿钢机股份有限公司 | Combined steel bridge structure system and its installation and construction method |
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