CN113863142A - Method for installing large-span river-crossing corridor cantilever - Google Patents
Method for installing large-span river-crossing corridor cantilever Download PDFInfo
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- CN113863142A CN113863142A CN202111060842.2A CN202111060842A CN113863142A CN 113863142 A CN113863142 A CN 113863142A CN 202111060842 A CN202111060842 A CN 202111060842A CN 113863142 A CN113863142 A CN 113863142A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004873 anchoring Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 15
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 description 4
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/0046—Loggias
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Revetment (AREA)
Abstract
The invention discloses a method for installing a large-span river-crossing corridor cantilever, which is characterized in that a truss girder is erected on a side-crossing structure of a river-crossing corridor and the side-crossing structure is used as a support, so that the fundamental contradiction of site limitation is solved, a support does not need to be arranged in the middle of a river channel, piles are not needed in the river channel, the use amount of large-scale machines such as a drilling machine is greatly reduced, and the construction cost is reduced. The invention solves the problems that the traditional steel structure river-crossing corridor needs to be piled in a river channel for construction, and the construction difficulty is high.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a method for installing a large-span river-crossing corridor cantilever.
Background
The common steel structure installation mainly comprises a plurality of modes such as support method hoisting, longitudinal pushing, transverse sliding, lifting and the like, and the requirements on the most site conditions are higher if none of the above construction modes are adopted. When the field is limited, the mechanical type selection is increased or the using amount of technical measures is increased, and the construction cost is difficult to control. Especially to the construction of steel construction river-crossing vestibule, the place condition near the river course is relatively poor, sets up the support in the river course moreover and needs the pile, and the construction degree of difficulty is very big, and the cost is higher.
Disclosure of Invention
In order to overcome the defects in the prior art, the method for installing the large-span river-crossing corridor cantilever is provided so as to solve the problems that the traditional steel structure river-crossing corridor construction needs piling in a river channel and the construction difficulty is large.
In order to achieve the above object, there is provided a method for installing a large-span river-crossing corridor cantilever, the river-crossing corridor including a mid-span structure and side-span structures connected to both ends of the mid-span structure, the mid-span structure including a plurality of unit sections spliced together, the method comprising the steps of:
the side span structures are respectively installed on the river banks on the two sides of the river channel, so that the two side span structures are oppositely arranged;
installing a plurality of first supporting columns on the upper part of one side span structure, and installing a second supporting column on the upper part of the other side span structure, so that the plurality of first supporting columns are arranged along the length direction of the river-crossing corridor;
providing a truss girder which comprises an overhanging section and an anchoring section connected to the overhanging section, and movably mounting the anchoring section on the upper parts of the first support columns so that the overhanging section is overhanging to the outer side of one end of the side span structure facing the other side span structure and aligned to a second support column;
pushing the anchoring section towards the direction of the second supporting column, so that the cantilever section extends to the upper part of the second supporting column and is placed at the upper part of the second supporting column;
fixedly mounting the anchoring section to the first support column and fixedly mounting the cantilever section to the second support column;
and installing a crown block on the truss girder, hoisting the plurality of unit sections to the position between the two side span structures through the crown block, and installing the unit sections on the two side span structures to form the river-crossing corridor.
Furthermore, the side span structure is installed on the river bank by a support method.
Further, when a plurality of unit sections are installed on the two side span structures, the unit sections are spliced in opposite directions from the river banks on the two sides to the middle of the river channel to form the mid-span structure.
Furthermore, in the process of installing a plurality of unit sections on two side span structures, after the unit section in the previous section is installed, a total station is adopted to determine the spatial position of the overhanging end of the unit section in the previous section so as to obtain the deformation amount and the deformation direction of the unit section in the previous section, and when the unit section in the next section is positioned and measured, the anti-three-dimensional spatial deformation opposite to the deformation amount and the deformation direction of the unit section in the previous section is carried out on the positioning axis of the unit section in the next section, so that the position deviation of the unit sections is in a reasonable range.
The method for installing the cantilever of the large-span river-crossing corridor has the advantages that the truss girder is erected on the side-crossing structure of the river-crossing corridor, the side-crossing structure is used as a support, the fundamental contradiction that the site is limited is solved, a support does not need to be arranged in the middle of a river channel, pile driving in the river channel is not needed, the use amount of large machines such as drilling rigs is greatly reduced, the construction cost is reduced, the crown block units on the truss girder are transported to the set position, the situations of hoisting radius limitation, lever rod carrying and the like do not exist under the condition that the structural strength of the truss girder is met, the construction area is fully covered, the links of moving vehicles and supporting legs of the traditional crane are avoided, the installation efficiency is high, and the requirement of the large machines is reduced.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 to 7 are schematic diagrams illustrating steps of a method for installing a large-span river-crossing corridor cantilever 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 relevant invention and not restrictive of 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 embodiments with reference to the attached drawings.
Referring to fig. 7, the river-crossing corridor includes a midspan structure B including a plurality of unit sections B spliced together, and an edge-crossing structure a connected to both ends of the midspan structure B.
With continued reference to fig. 1 to 7, the present invention provides a method for installing a large-span river-crossing corridor cantilever, comprising the following steps:
s1: as shown in fig. 1, the side span structures a are respectively installed on the banks at both sides of the river channel, so that the side span structures a are oppositely arranged.
In this embodiment, the side span structure a is installed on the river bank by a scaffolding method.
S2: as shown in fig. 2 and 3, a plurality of first support columns 1 are installed on an upper portion of one side span structure a, and a second support column 2 is installed on an upper portion of the other side span structure a, such that the plurality of first support columns 1 are arranged along a length direction of the river crossing corridor.
S3: with continued reference to fig. 2 and 3, a truss beam 3 is provided, the truss beam 3 including a cantilever section and an anchor section. The cantilever section is connected to the anchoring section, and the cantilever section and the anchoring section are coaxially arranged, and the anchoring section is movably installed on the upper parts of the first support columns 1, so that the cantilever section can be cantilever to the outer side of one end of the side span structure A facing to the other side span structure A and can be aligned to the second support column 2.
S4: with continued reference to fig. 3, the anchoring section is pushed toward the second support column 2, so that the overhanging section extends above the second support column 2 and rests on the upper part of the second support column 2.
In this embodiment, two first support columns are installed on the side span structure on the left side of the river bank, and a first support column near the center of the river channel is hereinafter referred to as "center support". When the anchoring section is pushed, downward tensile force is applied to the anchoring section, the first anti-overturning bending moment of the anchoring section behind the middle support is constantly kept larger than the second anti-overturning bending moment of the cantilever section in front of the middle support, and a safety coefficient of more than 1.3 is kept (the first anti-overturning bending moment/the second anti-overturning bending moment is more than 1.3).
S5: as shown in fig. 4, the anchor section is fixedly attached to the first support column 1, and the cantilever section is fixedly attached to the second support column 2.
S6: as shown in fig. 5 to 6, a crown block 4 is installed on the truss girder 3, and a plurality of unit sections b are hoisted between the two side span structures a by the crown block 4 and installed on the two side span structures a to form a river-crossing corridor.
When the plurality of unit sections B are installed on the two-side span structure A, the plurality of unit sections B are oppositely spliced from the river banks on the two sides to the middle of the river channel to form the span structure B. The two side span structures on the river bank are oppositely constructed towards the center of the river channel, and the construction is closed to the middle position of the center of the river channel.
When the unit sections are installed, the crawler crane is matched with the overhead travelling crane to feed beams to the overhead travelling crane, the overhead travelling crane hoists the unit sections to a set position in a sectional mode, and after welding is completed, the overhead travelling crane loosens the hooks.
In the process of installing a plurality of unit sections b in a two-side span structure A, after the previous unit section b is installed, the spatial position of the overhanging end of the previous unit section b is determined by a total station to obtain the deformation amount and the deformation direction of the previous unit section b, and when the next unit section b is positioned and measured, the reverse three-dimensional spatial deformation opposite to the deformation amount and the deformation direction of the previous unit section b is carried out on the positioning axis of the next unit section b, so that the position deviation of the installed multiple unit sections b is in a reasonable range.
According to the installation method of the large-span river-crossing corridor cantilever, the truss girder is erected on the side-crossing structure of the river-crossing corridor, the side-crossing structure is used as a support, the fundamental contradiction that the site is limited is solved, a support is not required to be arranged in the middle of a river channel, pile driving in the river channel is not required, the use amount of large machines such as drilling machines is greatly reduced, the construction cost is reduced, the crown block units on the truss girder are transported to the set position in a saving mode, under the condition that the structural strength of the truss girder is met, the situations of hoisting radius limitation, lever shoring and the like do not exist, the construction area is fully covered, the links of moving vehicles and supporting legs of a traditional crane are avoided, the installation efficiency is high, and the requirement of the large machines is reduced.
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 (4)
1. A method for installing a large-span river-crossing corridor cantilever is characterized in that the river-crossing corridor comprises a midspan structure and side span structures connected to two ends of the midspan structure, the midspan structure comprises a plurality of unit sections spliced together, and the method for installing the large-span river-crossing corridor cantilever comprises the following steps:
the side span structures are respectively installed on the river banks on the two sides of the river channel, so that the two side span structures are oppositely arranged;
installing a plurality of first supporting columns on the upper part of one side span structure, and installing a second supporting column on the upper part of the other side span structure, so that the plurality of first supporting columns are arranged along the length direction of the river-crossing corridor;
providing a truss girder which comprises an overhanging section and an anchoring section connected to the overhanging section, and movably mounting the anchoring section on the upper parts of the first support columns so that the overhanging section is overhanging to the outer side of one end of the side span structure facing the other side span structure and aligned to a second support column;
pushing the anchoring section towards the direction of the second supporting column, so that the cantilever section extends to the upper part of the second supporting column and is placed at the upper part of the second supporting column;
fixedly mounting the anchoring section to the first support column and fixedly mounting the cantilever section to the second support column;
and installing a crown block on the truss girder, hoisting the plurality of unit sections to the position between the two side span structures through the crown block, and installing the unit sections on the two side span structures to form the river-crossing corridor.
2. The method for installing the large-span river-crossing corridor cantilever according to claim 1, wherein the side-crossing structure is installed on the river bank by a bracket method.
3. The installation method of the large-span river-crossing corridor cantilever as claimed in claim 1, wherein when installing a plurality of said unit sections on both said side-crossing structures, a plurality of said unit sections are spliced in opposite directions from said both banks to the middle of said river channel to form said mid-crossing structure.
4. The installation method of the large-span river-crossing corridor cantilever as claimed in claim 3, wherein during the installation of the plurality of unit sections on the two side-crossing structures, after the previous unit section is installed, a total station is used to determine the spatial position of the overhanging end of the previous unit section so as to obtain the deformation amount and the deformation direction of the previous unit section, and during the positioning measurement and control of the next unit section, the reverse three-dimensional spatial deformation opposite to the deformation amount and the deformation direction of the previous unit section is performed on the positioning axis of the next unit section, so that the positional deviation of the unit sections is within a reasonable range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060842.2A CN113863142A (en) | 2021-09-10 | 2021-09-10 | Method for installing large-span river-crossing corridor cantilever |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111060842.2A CN113863142A (en) | 2021-09-10 | 2021-09-10 | Method for installing large-span river-crossing corridor cantilever |
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| CN113863142A true CN113863142A (en) | 2021-12-31 |
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| CN202111060842.2A Pending CN113863142A (en) | 2021-09-10 | 2021-09-10 | Method for installing large-span river-crossing corridor cantilever |
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|---|---|---|---|---|
| CN202899044U (en) * | 2012-07-26 | 2013-04-24 | 中铁六局集团有限公司 | Vierendeel box-shaped double-girder bridge crane |
| CN105970836A (en) * | 2016-03-23 | 2016-09-28 | 中铁四局集团钢结构有限公司 | Method for erecting large-span lower chord variable truss high continuous steel trussed beam cantilever |
| JP2018053496A (en) * | 2016-09-27 | 2018-04-05 | 三井住友建設株式会社 | Bridge girder erection method for multiple span continuous bridge |
| CN108086166A (en) * | 2018-01-15 | 2018-05-29 | 中铁大桥勘测设计院集团有限公司 | Hybrid beam continuous rigid frame bridge steel box-girder installation method |
| CN109610330A (en) * | 2018-12-18 | 2019-04-12 | 腾达建设集团股份有限公司 | A kind of Bridge Erector passing method |
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| CN109797663A (en) * | 2019-01-15 | 2019-05-24 | 中铁大桥勘测设计院集团有限公司 | A kind of construction method that the floating bracket of bridge structure is set |
| CN111172892A (en) * | 2019-12-31 | 2020-05-19 | 广西建工集团第一安装有限公司 | Bilateral balance traction device and method for steel structure frame bridge |
| CN112030772A (en) * | 2020-09-14 | 2020-12-04 | 河南省交通规划设计研究院股份有限公司 | Rapid construction method of continuous rigid frame bridge |
| CN112195780A (en) * | 2020-09-09 | 2021-01-08 | 广州瀚阳工程咨询有限公司 | Numerical control method for erection line shape of segmental precast bridge |
-
2021
- 2021-09-10 CN CN202111060842.2A patent/CN113863142A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202899044U (en) * | 2012-07-26 | 2013-04-24 | 中铁六局集团有限公司 | Vierendeel box-shaped double-girder bridge crane |
| CN105970836A (en) * | 2016-03-23 | 2016-09-28 | 中铁四局集团钢结构有限公司 | Method for erecting large-span lower chord variable truss high continuous steel trussed beam cantilever |
| JP2018053496A (en) * | 2016-09-27 | 2018-04-05 | 三井住友建設株式会社 | Bridge girder erection method for multiple span continuous bridge |
| CN108086166A (en) * | 2018-01-15 | 2018-05-29 | 中铁大桥勘测设计院集团有限公司 | Hybrid beam continuous rigid frame bridge steel box-girder installation method |
| CN109610330A (en) * | 2018-12-18 | 2019-04-12 | 腾达建设集团股份有限公司 | A kind of Bridge Erector passing method |
| CN109797663A (en) * | 2019-01-15 | 2019-05-24 | 中铁大桥勘测设计院集团有限公司 | A kind of construction method that the floating bracket of bridge structure is set |
| CN109778718A (en) * | 2019-03-05 | 2019-05-21 | 中铁四局集团有限公司 | Construction method for long-span continuous steel box girder main span pure cantilever assembly mid-span closure |
| CN111172892A (en) * | 2019-12-31 | 2020-05-19 | 广西建工集团第一安装有限公司 | Bilateral balance traction device and method for steel structure frame bridge |
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Application publication date: 20211231 |
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