CN114016422B - Steel girder erection method - Google Patents
Steel girder erection method Download PDFInfo
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- CN114016422B CN114016422B CN202111410536.7A CN202111410536A CN114016422B CN 114016422 B CN114016422 B CN 114016422B CN 202111410536 A CN202111410536 A CN 202111410536A CN 114016422 B CN114016422 B CN 114016422B
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- girder
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- pier top
- steel beam
- pier
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 84
- 239000010959 steel Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000010276 construction Methods 0.000 abstract description 17
- 238000013461 design Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000011900 installation process Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
-
- 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
Abstract
The application discloses a steel girder erection method, which relates to the technical field of bridge engineering, and comprises the following steps: hoisting a steel beam section to a pier top area of a pier top and a first area at one side of the pier top by using a girder erecting crane arranged on a pier side bracket; hoisting a steel beam section to a second area on the other side of the pier top by using the girder erection crane; when the girder segments are hoisted in the second area, stay cables are arranged between the girder segments which are hoisted in the second area and the girder segments in the first area corresponding to the girder segments. And hoisting the steel beam sections to the preset positions of the second areas on the other side, wherein each hoisting section of the steel beam sections of the second areas is symmetrically provided with stay cables on the corresponding steel beam sections on the two side areas. So that the stay ropes at two sides are symmetrically installed at the same time. The construction period of steel girder erection is saved.
Description
Technical Field
The application relates to the technical field of bridge engineering, in particular to a steel girder erection method.
Background
Along with the national development, the demands of people for traffic convenience are increasing, and the cable-stayed bridge is a conventional traffic mode for people to travel across the river. And the girder steel of the bridge is required to be constructed in advance when the cable-stayed bridge is erected on the river.
The conventional cable-stayed bridge girder erection generally adopts symmetrical hoisting construction of a girder erection crane cantilever, and the construction process flow generally comprises the following steps: and constructing pier side brackets around the main pier, installing pier top area steel beam sections (large floating cranes are adopted in water areas, large crawler cranes are adopted in land areas and the like) by using large hoisting equipment, then installing girder erection cranes on the pier top area steel beam tops of the main pier, and then hoisting the steel beam sections by using symmetrical cantilevers of the girder erection cranes and tensioning stay cables. And finally, the girder erection crane moves forward, and the cantilever is repeatedly and symmetrically hoisted to the girder segments until the full bridge is closed.
Therefore, on one hand, in the conventional steel girder erection, construction is required to be firstly performed in a pier top area. The pier top area needs to use large-scale lifting equipment, and the area on the conventional pier top is limited by the floor area of the crane, and the pier top area is generally formed by a plurality of sections of steel beams, so that the section installation procedure is complex, the lifting times are high, and the construction period is long. On the other hand, if the stay cables are hoisted and constructed at the same time on two sides of the pier top, two girder erection cranes need to be erected for one pier top, and the engineering quantity prepared in the earlier stage is too large. If the two sides of the pier top are constructed one by one, the stay cables on the two sides can be installed only after the areas on the two sides of the pier top are lifted, so that the cost is greatly increased due to slow construction period when the two sides of the pier top are constructed one by one.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a steel beam erection method for solving the problems of overlong construction period of steel beam sections on two sides of a pier top and overhigh preparation cost in the early stage.
In order to achieve the above purpose, the technical scheme adopted by the application is to provide a steel beam erection method, which comprises the following steps:
hoisting a steel beam section to a pier top region and a first region at one side of a pier top by using a girder erection crane arranged on a pier side bracket;
hoisting a steel beam section to a second area on the other side of the pier top by using the girder erection crane;
and when the steel beam section is hoisted in the second area, installing a stay cable between the steel beam section of which hoisting in the second area is completed and the steel beam section of the first area corresponding to the steel beam section.
In some embodiments, the hoisting the steel beam section to the second region of the other side of the pier top using the girder erection crane comprises:
and moving the girder erection crane to the girder segment of the pier top area, and hoisting the girder segment under the bridge to the second area through the girder erection crane.
In some embodiments, before the hoisting the girder segments under the bridge to the second area by the girder erection crane, the method includes:
and (3) hoisting one steel beam section to the second area, and moving the girder erection crane to the steel beam section farthest from the pier top on the second area.
In some embodiments, before the girder segments are hoisted to the pier top area of the pier top and the first area of the pier top side using the girder hoist mounted on the pier side bracket, the girder hoist comprises:
and erecting a slideway beam and a slideway beam bracket on the pier-side bracket, and installing the girder erection crane on the pier-side bracket.
In some embodiments, the mounting the girder erection crane on the pier-side bracket includes:
erecting a stand bracket on one side of the pier-side bracket, which is close to the second area, at a set height so that the stand bracket is level with the top end of a steel beam section to be landed on the slideway beam;
and installing the girder erection crane on the station support.
In some embodiments, the hoisting the steel beam section to the pier top area of the pier top and the first area of the pier top side using a girder erection crane mounted on a pier side bracket comprises:
hoisting the steel girder segment to the slideway beam by using the girder erection crane;
and sliding the steel beam section to a preset position of the pier top area and the first area through the slideway beam.
In some embodiments, the hoisting the steel beam segment to the skid beam using the girder erection crane comprises:
and lifting the steel beam section by using a rotary lifting appliance of the girder erection crane, and controlling an overhead travelling crane of the girder erection crane to do longitudinal bridge movement on a hanger sliding rail of the girder erection crane so as to enable the steel beam section to move onto the slideway beam.
In some embodiments, the controlling the crown block of the girder erection crane to make a longitudinal bridge movement on a hanger rail of the girder erection crane to move the girder segment onto the slideway girder comprises:
after the steel beam sections are lifted to a preset height through the rotary lifting tool, the posture of the steel beam sections is adjusted by using a rotary assembly on the rotary lifting tool so that the steel beam sections can pass through the girder erection crane to be placed on the slideway girder.
In some embodiments, the first region is a side of the pier top near the shore, and the second region is a side of the pier top away from the shore.
In some embodiments, the first region is a side of the pier top away from the shore, and the second region is a side of the pier top near the shore.
Compared with the prior art, the application has the advantages that:
(1) In the girder erection method, girder segments are hoisted to the pier top area and the first area preferentially, and the girder segments are moved and positioned to the design positions of the pier top area and the first area. And hoisting the steel beam sections to the preset positions of the second areas on the other side, wherein each hoisting section of the steel beam sections of the second areas is symmetrically provided with stay cables on the corresponding steel beam sections on the two side areas. So that the stay ropes at two sides are symmetrically installed at the same time. The construction period of steel girder erection is saved.
(2) In the girder erection method of the application, the girder erection crane is provided with the rotating device so that the wide girder segments can pass through the lower gear of the girder erection crane through rotation.
(3) In the girder erection method, the slideway girder is erected on the pier-side bracket so as to combine the girder and the bracket. The usage amount of the support structure is greatly reduced, and meanwhile, the steel beam section can rapidly slide to a preset position for parking, so that the construction steps are simplified.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a step of hoisting a section of steel girder to a first area in an embodiment of the present application;
FIG. 2 is a side view of a girder erection crane and its mounting portion according to an embodiment of the present application;
FIG. 3 is a front view of a step of lifting a section of steel girder to a first area according to an embodiment of the present application;
fig. 4 is a front view of a step of hoisting a steel girder segment to a second area in an embodiment of the present application.
In the figure: 1. a pier-side bracket; 2. a station support; 3. a slideway beam; 4. a slideway beam bracket; 5. a girder erection crane; 51. a hanger slide rail; 52. a crown block; 53. rotating the lifting appliance; 6. a pier top area; 7. a first region; 8. a second region; 9. and (5) a steel beam section.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Embodiments of the present application are described in further detail below with reference to the accompanying drawings.
The application provides a steel beam erection method, which comprises the following steps:
s1, installing a girder erection crane 5 on an erected pier-side bracket 1.
Preferably, the site bracket 2 is mounted on the side of the pier side bracket 1 remote from the first area. And the girder erection crane 5 is spliced on the station support 2 in a scattered manner, and hoisting of the shore side girder segments is started after temporary anchoring. The station support 2 is a detachable component, so that the subsequent disassembly and assembly are convenient.
Specifically, as shown in fig. 2 and 3, a pier-side bracket 1 is installed beside a main pier, a slideway beam 3 and a slideway beam bracket 4 are erected on the pier-side bracket 1, and the girder erection crane 5 is installed on one side of the pier-side bracket 1 close to the second area 8. It is worth noting that the second region 8 and the first region 7 are essentially indistinguishable. The first zone 7 is the zone where the girder segments are preferably hoisted in a subsequent step, so that when the runner beams 3 are erected, the runner beams 3 of the first zone 7 are longer, and the runner beams 3 need to be extended at least as far as the last segment of the girder segments 9 of the first zone 7 should be erected in the design of the second zone 8 according to the design. The corresponding need arises to erect the skid beam brackets 4 at the portion of the skid beam 3 located in the second region 8.
Preferably, the installation process of the girder erection crane 5 includes: a hanger slide rail 51 and a crown block 52 are mounted on the pier-side bracket 1, the crown block 52 is used for hoisting the girder segments, and the crown block 52 can slide on the hanger slide rail 51 along the longitudinal bridge direction.
Further, the mounting process of the girder erection crane 5 further comprises mounting a rotating spreader 53 on the crown block 52.
Preferably, in general the first zone 7 is typically the just-astride zone of the side of the pier top close to the shore and the second zone 8 is typically the midspan zone of the side of the pier top remote from the shore. This is because, as shown in fig. 1, if the second area 8 is preferentially constructed, a constructor will first construct auxiliary equipment such as the slideway beam bracket 4 under the first area 8, which will affect the passage of the ship in the river channel and cause the ship to have a collision risk. In addition, the topography of the bottom river bed near one side of the river bank is generally higher, and equipment such as a support is constructed in the areas with higher topography, so that the engineering consumption can be saved, and the construction period can be shortened.
Of course, depending on the working conditions and environmental requirements, the first area 7 may also be designed as the side of the pier top away from the shore. Correspondingly, the second area 8 is the side of the pier top close to the shore.
It can be understood that the pier-side bracket 1, the station support 2 and the slideway beam support 4 are combined, the proposal of the application starts from assembling the girder erection crane 5, the girder erection crane is assembled into a rod piece in a scattered manner, the hoisting weight is reduced (the weight of the rod piece and the girder piece is controlled at 15t, and the existing tower crane operation of a main pier is used), and the investment of large hoisting equipment is avoided.
It should be noted that the stand support 2 should be erected at a set height so that the top end of the stand support 2 is flush with the top end of the steel girder segment 9 subsequently hoisted on the slideway girder 3. This mounting facilitates the subsequent removal of the stop brackets 2 and the movement of the girder erection crane 5 onto the inverted girder segments 9.
S2, hoisting the girder segments 9 of the pier top area 6 and the first area 7 to the pier top and the first area 7 on one side of the pier top respectively by using the girder erection crane 5.
Specifically, a slipway beam 3 and a slipway beam bracket 4 are erected on the pier-side bracket 1, the girder erection crane 5 is installed on one side of the pier-side bracket 1, which is close to the second area 8, and the girder segments 9 of the pier top area 6 and the first area 7 positioned on the slipway beam 3 are respectively slipped to preset positions of the pier top and the first area 7. The position of the steel beam section 9 can be controlled more accurately through rail sliding, and complicated steps of repeated hoisting are avoided.
It will be appreciated that the slideway beam 3 is mounted on the fat bracket 1 so that the two are combined. Compared with the independent erection of the two, a great amount of bracket consumption is saved.
It should be noted that, in this case, the girder segments 9 of the pier top area 6 and the first area 7 are only placed at the preset position of the first area 7 (i.e. the laying position of the bridge design), or are placed at the preset position of the slideway beam 3 on the first area 7, but the slideway beam 3 is not hung with a stay cable, so that the construction closure is not completed yet.
It should be noted that the installation process of the girder erection crane 5 based on the above description shown in fig. 3 and 4 includes installing a hanger rail 51 and a crown block 52 on the pier bracket 1, wherein the crown block 52 is used for hoisting the girder segments, and the crown block 52 can slide on the hanger rail 51 along the longitudinal bridge direction. And a rotary hanger 53 is mounted on the crown block 52 for attitude adjustment after lifting the girder segments. The attitude of the girder segments 9 of the main span region 6 and the first lateral span region 7 can be adjusted by the rotary spreader 53 during the lifting and moving of the girder erection crane 5 so that they can be moved to a preset position through the girder erection crane 5. And then the girder segments 9 are placed on the slideway girder 3 by moving the crown block 52 to drive the girder segments to pass through the girder erection crane 5. This design is due to social progress and the number of automobiles is increasing. People need to provide more lanes on the same road to avoid bridge traffic jams. Therefore, the cross section width of the girder segment as the bridge erection foundation is wider, and if the posture is not adjusted during hoisting so that the narrower end of the girder segment passes through the neutral position of the girder erection crane, the girder segment can collide with equipment such as a bridge upper bracket and the like to cause unnecessary loss. As shown, the attitude is adjusted so that the girder segments 9 can be easily moved to a predetermined position of the first lateral zone 7 or the pier top through the girder erection crane 5.
S3, hoisting the steel beam section 9 to a second side span region 8 on the other side of the pier top by using the girder erection crane 5, and installing stay cables on the second side span region 8 steel beam section 9 and the corresponding steel beam section 9 of the first side span region 7 after hoisting one section of steel beam section 9 to the second side span region 8.
Specifically, after the installation of the shore side sections is completed, the temporarily erected station brackets 2 may be optionally removed. And the girder erection crane 5 is transferred to the top of the girder segment of the pier top and hoisting of the girder segment 9 of the second side span region 8 is started by means of a single cantilever.
Preferably, a sliding rail is provided on the top surface of the girder segment 9 to facilitate the movement of the girder erection crane 5 thereon to move on the girder segment 9, on which the hoisting and positioning have been completed, to continue the hoisting.
It should be noted that, each time the steel beam section 9 of the second side span region 8 of a section is lifted, the stay cable is correspondingly tensioned, and the installation of the second side span steel beam section 9 and the stay cable parked on the steel beam section 9 of the first side span region 7 is completed at the same time. As shown in fig. 4, each time the installation of one girder segment 9 on the second side span region 8 is completed, the girder erection crane 5 is moved to the girder segment 9 of the second region 8 farthest from the pier top to continue the hoisting of the next girder segment 9. When the second side span steel beam sections 9 are all hoisted and stay cables are installed, the steel beam sections 9 of the first area 7 and the second area 8 are all completed in construction of the full bridge closure.
In summary, in the steel girder erection method provided by the application, only one frame girder crane is needed to be equipped on a single pier top, so that the cost of early preparation is saved, the steel girder segment 9 is installed on one side of the pier top in advance, the main line construction period is not occupied, the whole construction period of the bridge is shortened, and the construction cost is effectively saved. In addition, the method has strong applicability, the construction area can be implemented under the condition of beam transportation, and the construction is firstly performed in the side-to-side area, so that whether the river has navigation conditions does not influence the implementation of the scheme. A rotation device is provided on the girder erection crane 5 to allow a wide girder segment to pass through the lower gear of the girder erection crane by rotation. The crane has universality and can not use large-scale equipment such as heavy cranes and the like because the steel beam sections are too wide.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A method of erecting a steel beam, comprising:
hoisting a steel beam section (9) towards a pier top area (6) of a pier top and a first area (7) at one side of the pier top by using a girder erecting crane (5) arranged on a pier side bracket (1);
hoisting a steel girder segment (9) to a second area (8) at the other side of the pier top by using the girder erection crane (5);
when the steel beam section (9) is hoisted in the second area (8), installing stay cables on the steel beam section (9) of the second area (8) and the steel beam section (9) of the first area (7) corresponding to the second area (8) after hoisting one section of steel beam section (9) to the second area (8);
the first area (7) is one side of the pier top close to the shore, and the second area (8) is one side of the pier top far from the shore;
before the girder segments (9) are hoisted to a pier top area (6) of a pier top and a first area (7) at one side of the pier top by using a girder erecting crane (5) arranged on a pier side bracket (1), the girder erecting crane comprises:
erecting a slideway beam (3) and a slideway beam bracket (4) on the pier-side bracket (1), and installing the girder erection crane (5) on one side, close to the second area (8), of the pier-side bracket (1); the slideway beam bracket (4) is positioned in the first area (7);
the steel beam segments (9) hoisted to the pier top area (6) and the first area (7) at the pier top side slide to the preset positions of the pier top area (6) and the first area (7) at the pier top side through the slideway beams (3);
the hoisting of the steel beam section (9) towards the pier top area (6) of the pier top and the first area (7) of one side of the pier top by using a girder erecting crane (5) mounted on a pier side bracket (1) comprises:
hoisting the steel girder segments (9) to the slideway beam (3) by using the girder erection crane (5);
-hoisting the steel girder segments (9) onto the slideway girder (3) using the girder erection crane (5), comprising:
lifting the steel beam section (9) by using a rotary lifting tool (53) of the girder erection crane (5), and controlling an overhead traveling crane (52) of the girder erection crane (5) to longitudinally bridge on a hanger sliding rail (51) of the girder erection crane (5) so as to enable the steel beam section (9) to move onto the slideway beam (3);
the controlling the crown block (52) of the girder erection crane (5) to make a longitudinal bridge movement on a hanger slide rail (51) of the girder erection crane (5) so as to move the girder segment (9) onto the slideway girder (3) comprises:
after the steel beam section (9) is lifted to a preset height through the rotary lifting tool (53), the posture of the steel beam section (9) is adjusted by using a rotary assembly on the rotary lifting tool (53) so that the steel beam section can pass through the girder erection crane (5) to be placed on the slideway girder (3).
2. A method of erecting a steel girder according to claim 1, characterized in that said hoisting a steel girder segment (9) to a second area (8) of the other side of the pier top using said girder erection crane (5) comprises:
and (3) moving the girder erection crane (5) onto the girder segment (9) of the pier top area (6), and hoisting the girder segment (9) under the bridge to the second area (8) through the girder erection crane (5).
3. A method of erecting a steel girder according to claim 2, characterized in that said hoisting of the underfloor steel girder segment (9) towards said second zone (8) by means of said girder erection crane (5) is preceded by:
and (3) hoisting one steel beam section (9) to the second area (8), and moving the girder erection crane (5) to the steel beam section (9) farthest from the pier top on the second area (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111410536.7A CN114016422B (en) | 2021-11-23 | 2021-11-23 | Steel girder erection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111410536.7A CN114016422B (en) | 2021-11-23 | 2021-11-23 | Steel girder erection method |
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| CN114016422A CN114016422A (en) | 2022-02-08 |
| CN114016422B true CN114016422B (en) | 2023-11-03 |
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| CN114016422A (en) | 2022-02-08 |
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