CN111254831B - Hoisting method of steel structure frame beam of through arch bridge - Google Patents
Hoisting method of steel structure frame beam of through arch bridge Download PDFInfo
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- CN111254831B CN111254831B CN202010065202.XA CN202010065202A CN111254831B CN 111254831 B CN111254831 B CN 111254831B CN 202010065202 A CN202010065202 A CN 202010065202A CN 111254831 B CN111254831 B CN 111254831B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
-
- 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
- E01D4/00—Arch-type bridges
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a hoisting method of a steel structure frame beam of a half-through arch bridge, which comprises the following steps: presetting a main arch; prefabricating a plurality of first section steel beams, wherein each first section steel beam comprises a first cross beam and a first main longitudinal beam provided with a track; prefabricating a plurality of second section steel beam assemblies, wherein each second section steel beam assembly comprises a second main longitudinal beam and a second secondary longitudinal beam, and a track is arranged on each second main longitudinal beam; placing the second section of steel girder assembly on the first section of steel girder; hoisting at least two first section steel beams below the main arch; hoisting a second main longitudinal beam between the first cross beams of the two first section steel beams to enable a track on the second main longitudinal beam to be communicated with a track on the first main longitudinal beam; and arranging a second crane on the track of the first main longitudinal beam, and hoisting a plurality of second longitudinal beams between the two first cross beams through the second crane. According to the self characteristics of the steel structure frame beam, the method combining whole section assembly and part assembly is adopted, and the hoisting and erection construction period of the steel structure frame beam is shortened.
Description
Technical Field
The utility model relates to a bridge construction technical field specifically is a hoisting method of steel construction frame roof beam of half way through type arch bridge.
Background
With the development of the traffic construction business in mountainous areas, the arch bridge is widely applied due to the unique structural stress characteristics, the steel-concrete combination beam is widely applied in the modern bridge construction, and the steel frame beam is also widely applied in the arch bridge as an important structural form in a combination beam system.
In the prior art, most of arch bridges in mountainous areas are constructed by cable cranes, and for steel frame beam systems, continuous integral sections cannot be formed due to the characteristics of steel structures, and part of components can only be hoisted by parts. For the half-through arch bridge, the cable crane is used for hoisting steel beam parts, and the defects of low work efficiency and poor operability are easily caused by the interference of a main arch connecting system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a hoisting method of a steel structure frame beam of a half-through arch bridge, which adopts a method combining whole-section assembly and part assembly according to the characteristics of the steel structure frame beam, improves the hoisting efficiency of the steel structure frame beam, and shortens the hoisting and erection period of the steel structure frame beam.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a hoisting method of a steel structure frame beam of a half-through arch bridge comprises a preparation process and a hoisting process; the preparing process includes:
-pre-erecting a main arch;
-prefabricating a plurality of first section steel girders, wherein the first section steel girders comprise two first cross girders arranged in parallel, two first main longitudinal girders arranged in parallel and a plurality of first secondary longitudinal girders arranged in parallel, the first main longitudinal girders and the first secondary longitudinal girders are erected between the two first cross girders, and a track is arranged on the first main longitudinal girders;
-prefabricating a plurality of second section steel girder assemblies, wherein each second section steel girder assembly comprises two second main longitudinal girders and a plurality of second secondary longitudinal girders, and each second main longitudinal girder is provided with a track;
the hoisting process comprises the following steps:
step S1: placing the second section of steel girder assembly on the first section of steel girder;
step S2: hoisting at least two first section steel beams below the main arch;
step S3: hoisting the second main longitudinal beam between the first cross beams of the two first section steel beams to enable the track on the second main longitudinal beam to be communicated with the track on the first main longitudinal beam;
step S4: and arranging a second crane on the track of the first main longitudinal beam, and hoisting a plurality of second longitudinal beams between the two first cross beams through the second crane to complete the folding of the two first sections of steel beams.
On the basis of the above technical solution, the specific steps of step S4 are:
placing a second crane on the track of the first main longitudinal beam;
and the second crane sequentially lifts the second longitudinal beams, aligns the second longitudinal beams to the first longitudinal beams one by one through the first cross beam, and installs the second longitudinal beams on the first cross beam.
On the basis of the above technical solution, the specific step of step S3 includes:
bolting or welding the second main longitudinal beam to the first cross beam.
On the basis of the technical scheme, the second crane is a gantry crane.
On the basis of the above technical solution, the specific step of step S1 includes:
and respectively placing the two second main longitudinal beams at the positions, close to the two first main longitudinal beams, on the first section of steel beam.
On the basis of the technical scheme, in the step S2, at least two first section steel beams are hoisted below the main arch by using a cable crane;
in the step S3, the second main longitudinal beam is hoisted using the cable crane.
On the basis of the above technical solution, the specific steps of step S3 are:
hoisting the second main longitudinal beam close to the first main longitudinal beam between the first cross beams of the two first section steel beams by using a cable crane;
the cable crane aligning the second main longitudinal beam with the first main longitudinal beam through the first cross beam;
and bolting or welding the second main longitudinal beam on the first cross beam to enable the track on the second main longitudinal beam to be communicated with the track on the first main longitudinal beam.
On the basis of the technical scheme, in the hoisting process, all the first section of steel beam is hoisted in sequence along the two arch springing midspans of the main arch, and the closure is carried out through the second section of steel beam assembly.
Compared with the prior art, the invention has the advantages that:
according to the hoisting method of the steel structure frame beam suitable for the through arch bridge, provided by the invention, the first section of steel beam is assembled on the ground in advance by adopting a method of combining whole section assembly and part assembly according to the characteristics of the steel structure frame beam, so that the workload of high-altitude operation of the steel structure frame beam at the high-altitude position of the arch bridge is reduced. Secondly, place the second loop wheel machine on the track on first section girder steel and second main longitudinal beam, and use the second loop wheel machine hoist and mount a plurality of secondary longerons of placing on first section girder steel, avoid using the cable loop wheel machine of big specification to hoist a plurality of secondary longerons, reduce the interference of the inboard connected system of main arch, improve the hoist and mount efficiency of steel structure frame roof beam. And thirdly, when the gantry crane is used for hoisting, the cable crane is not needed, so that when a plurality of second longitudinal beams are hoisted, the subsequent first section of steel beam or the second main longitudinal beam can be hoisted simultaneously, and the hoisting erection period of the steel structure frame beam can be shortened.
Drawings
FIG. 1 is a schematic view of an overall layout of a half-through arch bridge according to an embodiment of the present invention;
FIG. 2 is a schematic layout of steel framed girders of a half-through arch bridge according to an embodiment of the present invention;
FIG. 3 is a view from the direction A-A in FIG. 2;
in the figure: 1. a main arch; 2. a boom; 3. a first section of steel girder; 31. a first cross member; 32. a first main longitudinal beam; 33. a first minor stringer; 41. a second main longitudinal beam; 42. a second stringer; 5. and a second crane.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Examples
Referring to fig. 1 to 3, an embodiment of the invention provides a hoisting method for a steel structure frame beam of a half-through arch bridge, and the hoisting method includes a preparation process and a hoisting process; the preparing process includes:
pre-erecting a main arch 1;
prefabricating a plurality of first section steel girders 3, wherein the first section steel girders 3 comprise two first cross girders 31 arranged in parallel, two first main longitudinal girders 32 arranged in parallel and a plurality of first secondary longitudinal girders 33 arranged in parallel, the first main longitudinal girders 32 and the first secondary longitudinal girders 33 are erected between the two first cross girders 31, and a rail is arranged on the first main longitudinal girders 32;
prefabricating a plurality of second section steel girder assemblies, wherein each second section steel girder assembly comprises two second main longitudinal girders 41 and a plurality of second secondary longitudinal girders 42, and a track is arranged on each second main longitudinal girder 41;
the hoisting process comprises the following steps:
step S1: placing the second section of steel girder assembly on the first section of steel girder 3;
step S2: hoisting at least two first section steel beams 3 below the main arch 1;
step S3: hoisting the second main longitudinal beam 41 between the first cross beams 31 of the two first section steel beams 3, so that the track on the second main longitudinal beam 41 is communicated with the track on the first main longitudinal beam 32;
step S4: and placing a second crane 5 on the track of the first main longitudinal beam 32, and hoisting a plurality of second longitudinal beams 42 between the two first cross beams 31 through the second crane 5 to complete the folding of the two first sections of steel beams 3.
Specifically, the specific step of step S4 is:
placing a second crane 5 on the track of the first main longitudinal beam 32;
the second crane 5 sequentially lifts the second longitudinal beams 42, aligns the second longitudinal beams 42 one by one with the first longitudinal beams 33 through the first cross beams 31, and mounts the second longitudinal beams 42 on the first cross beams 31.
Further, the specific step of step S3 includes:
the second main longitudinal beam 41 is bolted or welded to the first cross member 31.
Specifically, the second crane 5 is a gantry crane.
Preferably, the specific step of step S1 includes:
two second main longitudinal beams 41 are respectively placed on the first section steel beam 3 at positions close to the two first main longitudinal beams 32.
Specifically, in the step S2, at least two first-section steel beams 3 are hoisted below the main arch 1 using a cable crane;
in step S3, the second main longitudinal beam 41 is hoisted using the cable crane.
Specifically, the specific steps of step S3 are:
hoisting the second main longitudinal beam 41 close to the first main longitudinal beam 32 between the first cross beams 31 of the two first-section steel beams 3 using a cable crane;
the cable crane aligns the second main longitudinal beam 41 with the first main longitudinal beam 32 via the first cross beam 31;
the second main longitudinal beam 41 is bolted or welded to the first cross member 31, and the rail on the second main longitudinal beam 41 and the rail on the first main longitudinal beam 32 are communicated.
In this embodiment, the second main longitudinal beam 41 is used to connect two adjacent first section steel beams 3, all the first section steel beams 3 are connected to form a bridge deck, and the first main longitudinal beam 32 and the second main longitudinal beam 41 are both provided with tracks for the gantry crane to travel, so that the gantry crane can be moved to a target position as required to hoist the second longitudinal beam 42 placed on the first section steel beam 3, and the traveling route of the gantry crane and the construction route of the cable crane are not interfered with each other, so that the first section steel beam 3 and the second main longitudinal beam 41 can be hoisted at the front side at the same time, and the gantry crane hoists the second longitudinal beam 42 at the back side, thereby effectively and quickly shortening the construction period.
Preferably, in the hoisting process, all the first section steel beams 3 are hoisted in sequence along two arch springing of the main arch 1 toward midspan, and are closed through the second section steel beam assembly. In the hoisting process, the first section of steel beam 3 and the second section of steel beam assembly are erected at two arch feet of the arch bridge respectively until the midspan butt joint of the arch bridge is achieved, the construction is not interfered with each other, the construction period can be effectively shortened, and the construction efficiency is improved.
In the following, a specific embodiment of the present invention is described, and the hoisting method of the steel structural frame beam of the half-through arch bridge provided in this embodiment includes the following steps:
the first step is as follows: a main arch 1 is erected in advance, and a plurality of suspension rods 2 are hoisted on the main arch 1.
The second step is that: a plurality of first section steel girders 3 and a plurality of second section steel girder assemblies are prefabricated. The first section of steel beam 3 comprises two first cross beams 31 arranged in parallel, two first main longitudinal beams 32 arranged in parallel and a plurality of first secondary longitudinal beams 33 arranged in parallel, the first main longitudinal beams 32 and the first secondary longitudinal beams 33 are erected between the two first cross beams 31, and a track is arranged on the first main longitudinal beams 32; the first cross beam 31 is arranged along the transverse bridge direction of the arch bridge, and the first main longitudinal beam 32 is arranged along the longitudinal bridge direction of the arch bridge. The second section steel beam assembly comprises two second main longitudinal beams 41 and a plurality of second longitudinal beams 42, and a track is arranged on the second main longitudinal beams 41.
The third step: placing the second section of steel girder assembly on the first section of steel girder 3; the two first main longitudinal beams 41 are respectively placed close to the two first main longitudinal beams 32, and all the second longitudinal beams 42 are placed on part of the first longitudinal beams 33 of the first section of steel girder 3 in the transverse bridge direction of the arch bridge.
The fourth step: two first-section steel girders 3 are hoisted to the bottom of the boom 2 using a cable crane under the main arch 1, wherein the boom 2 is connected to the first cross member 31.
The fifth step: the cable crane is positioned outside the main arch 1, the second main longitudinal beam 41 is hoisted between the first cross beams 31 of the two first section steel beams 3 by using a sling of the cable crane, the second main longitudinal beam 41 is bolted or welded on the first cross beams 31, so that a track on the second main longitudinal beam 41 is communicated with a track on the first main longitudinal beam 32, and the communicated track can be used for the gantry crane to run along the erected track.
And a sixth step: placing a gantry crane on the track of the first main longitudinal beam 32, and hoisting a plurality of second longitudinal beams 42 between the two first cross beams 31 through the gantry crane, so that the second longitudinal beams 42 and the first longitudinal beams 33 are in one-to-one butt joint through the first cross beams 31, and the folding of the two first section steel beams 3 is completed.
The seventh step: and repeatedly hoisting the rest first section of steel beam 3 and the rest second section of steel beam assembly according to the modes from the third step to the sixth step until the hoisting of the steel structure frame beam is finished. In the hoisting method, all the first section steel beams 3 are sequentially hoisted and hoisted along the two arch springing of the main arch 1 towards the midspan, and are closed through the second section steel beam assembly.
Specifically, when the cable crane is used to hoist the first section of steel girder 3 being erected, the second crane 5 is placed on the track of the erected first main longitudinal girder 32, and a plurality of the second longitudinal girders 42 are hoisted between the two erected first cross girders 31.
The embodiment of the invention provides a hoisting method of a steel structure frame beam suitable for a half-through arch bridge, which is characterized in that according to the characteristics of the steel structure frame beam, a method combining whole-section assembly and part assembly is adopted, a first section of steel beam 3 is assembled on the ground in advance, and the workload of high-altitude operation of the steel structure frame beam at the high-altitude position of the arch bridge is reduced; secondly, placing a second crane 5 on the tracks on the first section of steel beam 3 and the second main longitudinal beam 42, and hoisting a plurality of second longitudinal beams 42 placed on the first section of steel beam 3 by using the second crane 5, so that the hoisting of the plurality of second longitudinal beams 42 by using a large-size cable crane is avoided, the interference of a connecting system at the inner side of the main arch 1 is reduced, and the hoisting efficiency of the steel structure frame beam is improved; furthermore, since the second crane 5 does not need to use a cable crane during the lifting operation, it is possible to simultaneously lift the subsequent first-segment steel beam 3 or the second main longitudinal beam 41 during the lifting of the plurality of second longitudinal beams 42, and thus the period of time for lifting and erecting the steel-structure frame beam can be shortened.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (8)
1. A hoisting method of a steel structure frame beam of a half-through arch bridge is characterized by comprising a preparation process and a hoisting process; the preparing process includes:
-pre-erecting a main arch (1);
-prefabricating a number of first section steel beams (3), the first section steel beams (3) comprising two first cross beams (31) arranged in parallel, two first main longitudinal beams (32) arranged in parallel and a number of first secondary longitudinal beams (33) arranged in parallel, the first main longitudinal beams (32) and the first secondary longitudinal beams (33) both being erected between the two first cross beams (31), and a track being provided on the first main longitudinal beams (32);
-prefabricating a number of second section steel girder assemblies, which comprise two second main girders (41) and a number of second secondary girders (42), and on which second main girders (41) a track is provided;
the hoisting process comprises the following steps:
step S1: placing the second section of steel girder assembly on the first section of steel girder (3);
step S2: hoisting at least two first section steel beams (3) below the main arch (1);
step S3: hoisting the second main longitudinal beam (41) between the first cross beams (31) of the two first section steel beams (3) to enable the track on the second main longitudinal beam (41) to be communicated with the track on the first main longitudinal beam (32);
step S4: and placing a second crane (5) on the track of the first main longitudinal beam (32), and hoisting a plurality of second longitudinal beams (42) between the two first cross beams (31) through the second crane (5) to complete the folding of the two first section steel beams (3).
2. The method for hoisting the steel structural beam of the under-center arch bridge as recited in claim 1, wherein the step S4 comprises the specific steps of:
placing a second crane (5) on the track of the first main longitudinal beam (32);
the second crane (5) sequentially lifts the second longitudinal beams (42), the second longitudinal beams (42) are aligned to the first longitudinal beams (33) one by one through the first cross beams (31), and the second longitudinal beams (42) are installed on the first cross beams (31).
3. The method for hoisting the steel structural beam of the under-center arch bridge as recited in claim 2, wherein the step S3 comprises the steps of:
bolting or welding the second main longitudinal beam (41) to the first cross beam (31).
4. The method for hoisting the steel structural beam of the half-through arch bridge according to claim 2, wherein the second crane (5) is a gantry crane.
5. The method for hoisting the steel structural beam of the under-center arch bridge as recited in claim 1, wherein the step S1 comprises the steps of:
and respectively placing two second main longitudinal beams (41) on the first section steel beam (3) at positions close to the two first main longitudinal beams (32).
6. The method of hoisting the steel structural frame girder of the half-through arch bridge as recited in claim 1 or 5, wherein at least two first-section steel girders (3) are hoisted under the main arch (1) using a cable crane in the step S2;
in the step S3, the second main longitudinal beam (41) is hoisted using the cable crane.
7. The method for hoisting the steel structural beam of the under-center arch bridge as recited in claim 5, wherein the step S3 comprises the specific steps of:
-hoisting the second main longitudinal beam (41) close to the first main longitudinal beam (32) between the first transverse beams (31) of the two first section steel beams (3) using a cable crane;
the cable crane aligning the second main longitudinal beam (41) to the first main longitudinal beam (32) through the first cross beam (31);
bolting or welding the second main longitudinal beam (41) to the first cross beam (31) so that a rail on the second main longitudinal beam (41) and a rail on the first main longitudinal beam (32) communicate.
8. The method for hoisting the steel structural frame girder of the half-through arch bridge according to claim 1, wherein in the hoisting process, all the first section steel girders (3) are hoisted in sequence along both legs of the main arch (1) toward midspan and are closed by the second section steel girder assembly.
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| CN202010065202.XA CN111254831B (en) | 2020-01-20 | 2020-01-20 | Hoisting method of steel structure frame beam of through arch bridge |
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| CN202010065202.XA CN111254831B (en) | 2020-01-20 | 2020-01-20 | Hoisting method of steel structure frame beam of through arch bridge |
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