CN111827131A - Construction method for accurately positioning steel box girder arranged on module frame - Google Patents
Construction method for accurately positioning steel box girder arranged on module frame Download PDFInfo
- Publication number
- CN111827131A CN111827131A CN202010606551.8A CN202010606551A CN111827131A CN 111827131 A CN111827131 A CN 111827131A CN 202010606551 A CN202010606551 A CN 202010606551A CN 111827131 A CN111827131 A CN 111827131A
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- box girder
- steel box
- module vehicle
- construction method
- module
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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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
-
- 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
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a construction method for accurately positioning a steel box girder erected by a module vehicle, which comprises the following steps: erecting a steel box girder by using a module vehicle, and transporting the steel box girder to a construction site; when the module vehicle runs to the position close to the contraposition position, the position of the steel box girder is measured and adjusted, and the module vehicle runs into the contraposition position again after the bottom of the steel box girder is higher than the contraposition position; enabling the module vehicle and the three-dimensional jack to jointly support the steel box girder; fine adjustment is carried out on the steel box girder by using a three-dimensional jack; withdrawing the module car after fine adjustment; the accurate positioning construction method for erecting the steel box girder on the module vehicle is used for splicing construction of bridges, the steel box girder is erected by the module vehicle to reach a construction site, the three-dimensional jack is used for fine adjustment of the steel box girder after the position of the steel box girder is roughly adjusted by the module vehicle at an alignment position, and the accuracy requirement of the module vehicle can still be met when the steel box girder with the variable cross section is erected.
Description
Technical Field
The invention relates to the technical field of bridge engineering mechanical equipment, in particular to a construction method for accurately positioning a steel box girder erected on a module frame.
Background
In the existing construction engineering, most urban bridge girder bodies adopt box girders with uniform cross sections and standard spans, hoisting construction can be adopted under the condition of environmental permission, and pushing and rotating construction can be adopted when the condition is not permitted; however, if a large-span variable cross-section box girder is encountered and hoisting, pushing or rotating construction cannot be adopted under the condition that the surrounding environment is unfavorable, the whole transportation and erection of the module vehicle are required. The current scheme of the module vehicle mainly comprises the steps of erecting a box girder with a uniform section; when the equal-section erection is carried out, the front section and the rear section of the box girder are the same, so that the accurate positioning is more convenient. However, when a box girder with a variable cross section is erected, the box girder has a front and rear cross section which is different from each other, and therefore, it is difficult to achieve a required accuracy in positioning only by the front and rear displacement of the module car.
Disclosure of Invention
The invention aims to solve at least one technical problem in the prior art, and provides an accurate positioning construction method for erecting a steel box girder by a module vehicle, which can effectively ensure the accuracy requirement of the module vehicle in erecting the steel box girder with a variable cross section.
According to the embodiment of the first aspect of the invention, the construction method for accurately positioning the module vehicle erection steel box girder comprises the following steps:
erecting a steel box girder by using a module vehicle, and transporting the steel box girder to a construction site;
when the module vehicle runs to the position close to the contraposition position, the position of the steel box girder is measured and adjusted, and the module vehicle runs into the contraposition position again after the bottom of the steel box girder is higher than the designed contraposition position;
the jacking stroke of the module vehicle is reduced, so that the module vehicle and the three-dimensional jacks on the module vehicle jointly support the steel box girder;
fine adjustment is carried out on the steel box girder by using a three-dimensional jack;
and (5) withdrawing the module vehicle after the steel box girder is fixed.
Has the advantages that: the accurate positioning construction method for erecting the steel box girder on the module vehicle is used for splicing construction of bridges, the steel box girder is erected by the module vehicle to reach a construction site, the three-dimensional jack is used for fine adjustment of the steel box girder after the position of the steel box girder is roughly adjusted by the module vehicle at an alignment position, and the accuracy requirement of the module vehicle can still be met when the steel box girder with the variable cross section is erected.
According to the construction method for accurately positioning the steel box girder erected by the module vehicle, disclosed by the embodiment of the first aspect of the invention, the module vehicle comprises the temporary buttress and the distribution beam, the temporary buttress bears the distribution beam, the distribution beam is provided with a plurality of supporting points, the supporting points and the three-dimensional jacks jointly support the steel box girder, and the distribution beam is used as a bearing platform of the steel box girder to be more stable.
According to the construction method for accurately positioning the steel box girder erected by the module vehicle, which is disclosed by the embodiment of the first aspect of the invention, the number of the supporting points is four, the pressure born by each supporting point is less than 25MPa, and the strength of the module vehicle is ensured.
According to the construction method for accurately positioning the module vehicle-erected steel box girder, after the distribution girder bears the steel box girder, the transverse limiting device is arranged at the position close to the outer side of the bottom plate of the steel box girder, the longitudinal limiting device is welded at the position close to the web plate of the steel box girder, and the longitudinal limiting device and the transverse limiting device are contacted and attached to each other, so that the steel box girder and the distribution girder are relatively stable in the transportation process.
According to the construction method for accurately positioning the module vehicle erection steel box girder, the wedge-shaped base plate is manufactured in advance according to the inclination of the bottom plate of the steel box girder, and the wedge-shaped base plate is arranged between the vertical top surface of the three-dimensional jack and the steel box girder so as to ensure that the vertical top surface of the three-dimensional jack can lift the steel box girder along the vertical direction.
According to the construction method for accurately positioning the steel box girder erected by the module vehicle, disclosed by the embodiment of the first aspect of the invention, the module vehicle is controlled to drive to a position 1.5m away from the alignment position, and the bottom of the steel box girder is controlled to be higher than the designed alignment position by more than 10cm, so that the safety is ensured.
According to the construction method for accurately positioning the steel box girder erected by the module truck, the three-dimensional jack finely adjusts the steel box girder and comprises a longitudinal and transverse adjusting step, the deviation between the center line adjustment and the design center line of the steel box girder is adjusted to be within 5mm by utilizing the longitudinal and transverse top surfaces of the three-dimensional jack, and the distances between the cover plate, the bottom plate and the web plate of the steel box girder and the cover plate, the bottom plate and the web plate of the section which is already installed in place are respectively adjusted to be 4-6 mm, so that the longitudinal and transverse adjusting method is perfected.
According to the construction method for accurately positioning the steel box girder erected by the module vehicle in the embodiment of the first aspect of the invention, the three-dimensional jack is used for accurately adjusting the steel box girder, the vertical adjustment step is also included, the elevation of the steel box girder is adjusted by using the vertical top surface of the three-dimensional jack, the height difference between the cover plate and the bottom plate of the steel box girder and the height difference between the cover plate and the bottom plate of the section which is already installed in place and the height difference between the cover plate and the bottom plate of the steel box girder are respectively controlled within 1mm, then the elevation of the other end of the steel box girder is adjusted to be 4-6 mm higher.
According to the construction method for accurately positioning the module vehicle-erected steel box girder, after vertical adjustment, steel checks whether the lower part of the steel box girder is borne on the temporary buttress or not, and pads steel plates on the unstressed part, so that the whole weight of the steel box girder falls on the temporary buttress.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a front view of an embodiment of the present invention;
fig. 2 is a left side view of an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1-2, a construction method for accurately positioning a steel box girder erected on a module frame comprises the following steps:
the method comprises the following steps: erecting a steel box girder by using the module vehicle 10 and transporting the steel box girder to a construction site;
preferably, the running speed is effectively controlled to be at most 1km/h, and the curve is less than 0.5 km/h. The center of gravity of the modular cart 10 is aligned with the overall load bearing center, and the longitudinal and lateral deviation is controlled within +/-20 mm.
In this embodiment, the modular cart 10 includes the temporary buttress 11 and the distribution beam 12, the distribution beam 12 is provided with a plurality of support points, the number of the support points is four, preferably, it is ensured that the pressure born by each support point is less than 25MPa, the pressure difference between each point is less than 8%, the three-dimensional jacks 20 are arranged on the distribution beam 12, each support point and each three-dimensional jack 20 bear the steel box beam, and the distribution beam 12 is used as a bearing platform of the steel box beam and is more stable.
Preferably, in order to ensure that the steel box girder is relatively stable with the temporary pier 11 during transportation, after the steel box girder is loaded by the distribution girder 12, a transverse limiting device 42 is arranged at a position close to the outer side of the bottom plate of the steel box girder, a longitudinal limiting device 41 is welded at a position close to the web plate of the steel box girder, the longitudinal limiting device 41 and the transverse limiting device 42 are in contact and attached with each other, and I32a I-steel is adopted for the longitudinal limiting device 41 and the transverse limiting device 42.
Step two: when the module vehicle 10 runs to the position close to the contraposition position, the position of the steel box girder is measured and adjusted, and after the bottom of the steel box girder is higher than the designed contraposition position, the module vehicle 10 runs into the contraposition position again;
preferably, the control module vehicle 10 runs to 1.5m away from the alignment position, and controls the bottom of the steel box girder to be higher than the designed alignment position by more than 10cm, so that safety is guaranteed.
Step three: the stroke of the three-dimensional jack 20 on the module vehicle 10 is reduced, so that the temporary buttress and the three-dimensional jack 20 jointly support the steel box girder;
in the present embodiment, the parameters of the three-dimensional jack 20 are: the maximum jacking weight is 200 tons, the jacking stroke is 200mm, the transverse displacement stroke is 100mm, the longitudinal displacement stroke is 100mm, and the adjustment precision is 0.5-1 mm.
Preferably, because the longitudinal slope and the transverse slope of the bottom plate of the steel box girder are large, the wedge-shaped base plate 30 needs to be manufactured in advance according to the inclination of the bottom plate of the steel box girder, and the wedge-shaped base plate 30 is arranged between the vertical top surface of the three-dimensional jack 20 and the steel box girder so as to ensure that the vertical top surface of the three-dimensional jack 20 can lift the steel box girder along the vertical direction. In this embodiment, the wedge-shaped pad 30 with a length of 0.55m and a width of 0.55m has better effect.
Step four: the steel box girder is finely adjusted by using a three-dimensional jack 20, and the fine adjustment comprises longitudinal and transverse adjustment and vertical adjustment;
adjusting in the longitudinal direction and the transverse direction: the deviation between the center line adjustment and the design center line of the steel box girder is within 5mm by utilizing the longitudinal and transverse top surfaces of the three-dimensional jack 20, and the distances between the cover plate, the bottom plate and the web plate of the steel box girder and the cover plate, the bottom plate and the web plate of the segment which is installed in place are respectively adjusted to be between 4 and 6mm, so that the longitudinal and transverse adjustment method is perfected.
A vertical adjustment step: the elevation of the steel box girder is adjusted by using the vertical top surface of the three-dimensional jack 20, so that the height difference between the cover plate and the bottom plate of the steel box girder and the cover plate and the bottom plate of the section which is already installed in place is controlled within 1mm, then the elevation of the other end of the steel box girder is adjusted to be 4-6 mm higher than the designed elevation, and the vertical adjustment method is perfected.
After vertical adjustment, checking whether the lower part of the steel box girder is loaded on the temporary buttress 11, and padding a steel plate at the unstressed part
Step five: after fine adjustment, the steel box girder is constructed conventionally, and the subsequent construction processes are all conventional technical means, so that the redundant description is not needed, and then the module vehicle 10 is withdrawn.
In this embodiment, the modular vehicle 10, i.e., the SPMT modular vehicle, is referred to as a self-propelled modular transport vehicle.
In this embodiment, the alignment position refers to a position where the next splicing process is performed at a reserved position based on the installed bridge segment.
The accurate positioning construction method for the steel box girder erected on the module frame is used for bridge splicing construction, the steel box girder is erected by the SPMT module vehicle 10 to reach a construction site, after the module vehicle 10 is utilized to carry out coarse adjustment on the position of the steel box girder according to the alignment position, the coarse adjustment is carried out, namely the traditional alignment adjustment method is used for enabling the steel box girder to be approximately aligned with the alignment position, then the jacking stroke of the module vehicle is reduced, the temporary buttress and the three-dimensional jack 20 bear the weight of the steel box girder together, then the three-dimensional jack 20 is utilized to carry out vertical and horizontal fine adjustment and vertical fine adjustment on the steel box girder, the accuracy requirement of the module vehicle 10 can be effectively guaranteed when the variable-section steel box girder is erected, and the method is also suitable for installation of the curved steel box girder.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (9)
1. The construction method for accurately positioning the steel box girder erected on the module frame is characterized by comprising the following steps of:
erecting a steel box girder on the module vehicle, and transporting the steel box girder to a construction site;
when the module vehicle runs to the position close to the alignment position, the position of the steel box girder is measured and adjusted, and the module vehicle runs into the alignment position again after the bottom of the steel box girder is higher than the designed alignment position;
lowering the jacking stroke of the module vehicle to enable the module vehicle and the three-dimensional jack on the module vehicle to jointly support the steel box girder;
fine adjustment is carried out on the steel box girder by using the three-dimensional jack;
and (5) after the steel box girder is fixed, withdrawing the module vehicle.
2. The accurate positioning construction method for the module vehicle erection steel box girder as claimed in claim 1, is characterized in that: the module car includes interim buttress and distribution roof beam, interim buttress bears the weight of the distribution roof beam, be equipped with a plurality of strong points on the distribution roof beam, each strong point with three-dimensional jack supports jointly the steel case roof beam.
3. The accurate positioning construction method for the module vehicle erection steel box girder as claimed in claim 2, is characterized in that: the number of the supporting points is four, and the pressure born by each supporting point is less than 25 MPa.
4. The accurate positioning construction method for the module vehicle erection steel box girder as claimed in claim 2, is characterized in that: after the steel box girder is borne by the distribution girder, a transverse limiting device is arranged on the outer side of a bottom plate tightly attached to the steel box girder, a longitudinal limiting device is welded on a web plate tightly attached to the steel box girder, and the longitudinal limiting device and the transverse limiting device are contacted and attached to each other.
5. The accurate positioning construction method for the module vehicle erection steel box girder as claimed in claim 4, is characterized in that: and manufacturing a wedge-shaped base plate in advance according to the inclination of the bottom plate of the steel box girder, and then arranging the wedge-shaped base plate between the vertical top surface of the three-dimensional jack and the steel box girder.
6. The accurate positioning construction method for the module vehicle erection steel box girder as claimed in claim 1, is characterized in that: and controlling the module vehicle to drive to a distance of 1.5m away from the alignment position, and controlling the bottom of the steel box girder to be higher than the designed alignment position by more than 10 cm.
7. The accurate positioning construction method for the module vehicle erection steel box girder as claimed in claim 1, is characterized in that: the method comprises the steps of accurately adjusting the steel box girder by the three-dimensional jack, wherein the steps of adjusting the steel box girder in the longitudinal direction and the transverse direction comprise adjusting the deviation between the center line adjustment and the design center line of the steel box girder within 5mm by utilizing the longitudinal and transverse top surfaces of the three-dimensional jack, and adjusting the distances between a cover plate, a bottom plate and a web plate of the steel box girder and the cover plate, the bottom plate and the web plate of a section which is installed in place to be 4-6 mm respectively.
8. The accurate positioning construction method for the module vehicle erection steel box girder as claimed in claim 7, is characterized in that: the method comprises the following steps that the steel box girder is finely adjusted by the three-dimensional jack, the height of the steel box girder is adjusted by the aid of the vertical top surface of the three-dimensional jack, so that the height difference between a cover plate and a bottom plate of the steel box girder and the height difference between the cover plate and the bottom plate of a section which is installed in place and the height difference between the cover plate and the bottom plate of the section which is installed in place are controlled to be within 1mm respectively, and then the height of the other end of the steel box girder is adjusted to be 4-6 mm higher than the designed.
9. The accurate positioning construction method for the module vehicle erection steel box girder according to claim 8, is characterized in that: and after the vertical adjustment is finished, checking whether the lower part of the steel box girder is borne on the temporary buttress or not, and padding a steel plate at the unstressed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606551.8A CN111827131A (en) | 2020-06-29 | 2020-06-29 | Construction method for accurately positioning steel box girder arranged on module frame |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010606551.8A CN111827131A (en) | 2020-06-29 | 2020-06-29 | Construction method for accurately positioning steel box girder arranged on module frame |
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Cited By (6)
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| CN112323644A (en) * | 2020-10-30 | 2021-02-05 | 中铁一局集团有限公司 | Beam transporting vehicle, beam transporting system, steel box beam assembling system and steel box beam assembling method |
| CN113152294A (en) * | 2021-04-19 | 2021-07-23 | 浙江中天恒筑钢构有限公司 | Three-dimensionally adjustable large-scale component conveying platform device and construction method |
| CN113774807A (en) * | 2021-09-29 | 2021-12-10 | 安徽省公路桥梁工程有限公司 | Upper-span bridge swivel construction method applied to narrow and limited operation space |
| CN114351595A (en) * | 2021-12-31 | 2022-04-15 | 广东力特工程机械有限公司 | Prestressed concrete box girder transportation method |
| CN114411560A (en) * | 2022-01-27 | 2022-04-29 | 武汉二航路桥特种工程有限责任公司 | Beam accurate positioning regulation and control system and use method thereof |
| CN114674296A (en) * | 2022-02-21 | 2022-06-28 | 中交二航局结构工程有限公司 | Steel box girder assembly fine adjustment automatic regulation and control system |
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| CN114674296A (en) * | 2022-02-21 | 2022-06-28 | 中交二航局结构工程有限公司 | Steel box girder assembly fine adjustment automatic regulation and control system |
| CN114674296B (en) * | 2022-02-21 | 2024-02-20 | 中交二航局结构工程有限公司 | Steel box girder assembling fine-tuning automatic regulating and controlling system |
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Application publication date: 20201027 |