CN111778876A - Construction method of wide hanging basket - Google Patents
Construction method of wide hanging basket Download PDFInfo
- Publication number
- CN111778876A CN111778876A CN202010742114.9A CN202010742114A CN111778876A CN 111778876 A CN111778876 A CN 111778876A CN 202010742114 A CN202010742114 A CN 202010742114A CN 111778876 A CN111778876 A CN 111778876A
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- CN
- China
- Prior art keywords
- hanging basket
- tracks
- loading
- basket
- walking
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- E01D21/10—Cantilevered erection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
Abstract
The invention relates to a construction method of a wide hanging basket; the technical scheme for solving the problem comprises the following steps: the stress and the elongation of each suspender are calculated through the Midas checking, and the bottom templates at different suspender positions are pre-lifted according to the calculation result; step two: the bottom basket is provided with a sliding beam and a rolling box, and the sliding beam supports the bottom basket to move on the rolling box when the hanging basket moves; step three: a reserved hole is formed in the No. 0 block, the upper structure of the single-side hanging basket is integrally assembled, stress of each reaction rod is calculated according to the concrete distribution condition of the beam body, and grading loading is carried out according to the prepressing requirement; step four: the six walking tracks are accurately adjusted by a level gauge, the heights of the tops of the six walking tracks are ensured to be on the same horizontal plane, the top surfaces of the tracks are polished to be flat, polytetrafluoroethylene plates are paved, the friction coefficients of the six tracks are basically the same, synchronous hydraulic jacks are adopted, the pressure and the extension of each jack are basically the same, a specially assigned person is sent to supervise the walking synchronism of the six main trusses, and the adjustment is carried out in time when the deviation exceeds 2 cm.
Description
Technical Field
The invention relates to the field of hanging basket construction methods, in particular to a wide hanging basket construction method.
Background
A plurality of problems of the wide hanging basket during construction, for example, the main bridge of the sinking hill sand river bridge is a double-tower double-cable-surface short-tower cable-stayed bridge, and the span is arranged as follows: 75+130+75m =280m, the bridge floor width is 40m, the beam bottom width is 31m, the structure is arranged in a whole frame, cantilever cast-in-place construction is adopted, the cantilever cast-in-place construction belongs to an ultra-wide hanging basket, an upper beam and a lower beam in front of the hanging basket are connected through 15 hanging straps, the extension amount of the hanging straps is 3-21mm, a method different from a conventional hanging basket is needed to be adopted to ensure the transverse flatness of the beam bottom plate 31m width, according to a simulation calculation result, the bottom basket is hung by only depending on the hanging straps on the outer side of the bottom plate, the strength and the rigidity of the lower beam cannot meet requirements, the ultra-wide hanging basket is specially designed to ensure the stability and the safety of the bottom basket when the hanging basket walks, the maximum segment of the beam is 235.5m in profile, the conventional preloading method is adopted, 15 days is consumed, manpower and material resources are extremely high, the occupation time of a key line is long, an unconventional preloading, The walking method of the system ensures the walking synchronization and the walking safety of the 6 main trusses.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a construction method of a wide hanging basket, which effectively solves the problems of great consumption of manpower and material resources and long occupied time of a line in the design and construction process of the conventional wide hanging basket.
The technical scheme for solving the problems is that the construction method of the wide hanging basket comprises the following construction steps:
the method comprises the following steps: the stress and the elongation of each suspender are calculated through the Midas checking, and the bottom templates at different suspender positions are pre-lifted according to the calculation result;
step two: the bottom basket is provided with a sliding beam and a rolling box, and the sliding beam supports the bottom basket to move on the rolling box when the hanging basket moves;
step three: a reserved hole is formed in the No. 0 block, the upper structure of the single-side hanging basket is integrally assembled, stress of each reaction rod is calculated according to the concrete distribution condition of the beam body, and grading loading is carried out according to the prepressing requirement;
step four: the six walking tracks are accurately adjusted by a level gauge, the heights of the tops of the six walking tracks are ensured to be on the same horizontal plane, the top surfaces of the tracks are polished to be flat, polytetrafluoroethylene plates are paved, the friction coefficients of the six tracks are basically the same, synchronous hydraulic jacks are adopted, the pressure and the extension of each jack are basically the same, a specially assigned person is sent to supervise the walking synchronism of the six main trusses, and the adjustment is carried out in time when the deviation exceeds 2 cm.
The hanging basket is novel in concept, ingenious in structure and high in practicability, and effectively solves the problems that manpower and material resources are greatly consumed and the occupied time of a line is long in the design and construction process of the conventional wide hanging basket.
Drawings
Fig. 1 is a picture puzzle of a hanging basket set of the present invention.
Fig. 2 is a front cross-sectional view of a bridge according to the present invention.
FIG. 3 is a schematic view of the diamond frame assembly structure of the present invention.
FIG. 4 is a schematic view of the walking system of the present invention.
FIG. 5 is a schematic view of the construction of the rear anchor system of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The construction method comprises the following steps:
the method comprises the following steps: the stress and the elongation of each suspender are calculated through the Midas checking, and the bottom templates at different suspender positions are pre-lifted according to the calculation result;
step two: the bottom basket is provided with a sliding beam and a rolling box, and the sliding beam supports the bottom basket to move on the rolling box when the hanging basket moves;
step three: a reserved hole is formed in the No. 0 block, the upper structure of the single-side hanging basket is integrally assembled, stress of each reaction rod is calculated according to the concrete distribution condition of the beam body, and grading loading is carried out according to the prepressing requirement;
step four: the six walking tracks are accurately adjusted by a level gauge, the heights of the tops of the six walking tracks are ensured to be on the same horizontal plane, the top surfaces of the tracks are polished to be flat, polytetrafluoroethylene plates are paved, the friction coefficients of the six tracks are basically the same, synchronous hydraulic jacks are adopted, the pressure and the extension of each jack are basically the same, a specially assigned person is sent to supervise the walking synchronism of the six main trusses, and the adjustment is carried out in time when the deviation exceeds 2 cm.
In the third step, phi 32 finish-rolled deformed steel bars and preformed holes are pre-embedded in the top plate of the No. 0 block, the upper structure of the hanging basket is assembled as required, the counter-force beam is placed at the designed position after the completion, the finish-rolled deformed steel bars are lengthened to serve as pull rods, and anchor plates and anchor nuts are assembled.
In step three, the experimental loading procedure: the loading adopts a mode of symmetrical loading according to working conditions, the load is a box girder load, and a jack loading path is as follows: r2 (R2 ') → R3 (R3') → R4 (R4 ')) → R5 (R5') → R6 (R6 ') → R7 (R7')) → R8 (R8 ') → R9 → R1 (R1');
the test procedure was as follows:
the first step is as follows: laying elevation monitoring points, measuring and recording original elevation values;
the second step is that: respectively placing the two jacks to R2 and R2', starting the oil pump to load to a designed value, screwing down the anchoring nut, and removing the jacks; respectively moving the jack to the positions R3 and R3', loading, and screwing down the anchoring nut; sequentially moving to R2 (R2') to finish loading;
the third step: measuring and recording elevation values of elevation layout points;
the fourth step: and repeating the second step and the third step according to a monitoring program to complete the prepressing monitoring.
Compared with the traditional equipment, the device has the following advantages:
the construction method improves the wide hanging basket memory ultra-wide hanging basket construction and erection, and the flatness of the hanging basket is difficult to ensure in the traditional wide hanging basket construction; the bottom basket is suspended by only the hanging strip on the outer side of the bottom plate, the strength and the rigidity of the rear lower cross beam cannot meet the requirements, the ultra-wide hanging basket needs to be specially designed, so that the stability and the safety of the bottom basket when the hanging basket is in walking are guaranteed, and a targeted solution is made to the problems that manpower and material resources are greatly consumed and the occupied time of a line is long in the construction process.
Claims (3)
1. The construction method of the wide hanging basket is characterized by comprising the following construction steps:
the method comprises the following steps: the stress and the elongation of each suspender are calculated through the Midas checking, and the bottom templates at different suspender positions are pre-lifted according to the calculation result;
step two: the bottom basket is provided with a sliding beam and a rolling box, and the sliding beam supports the bottom basket to move on the rolling box when the hanging basket moves;
step three: a reserved hole is formed in the No. 0 block, the upper structure of the single-side hanging basket is integrally assembled, stress of each reaction rod is calculated according to the concrete distribution condition of the beam body, and grading loading is carried out according to the prepressing requirement;
step four: the six walking tracks are accurately adjusted by a level gauge, the heights of the tops of the six walking tracks are ensured to be on the same horizontal plane, the top surfaces of the tracks are polished to be flat, polytetrafluoroethylene plates are paved, the friction coefficients of the six tracks are basically the same, synchronous hydraulic jacks are adopted, the pressure and the extension of each jack are basically the same, a specially assigned person is sent to supervise the walking synchronism of the six main trusses, and the adjustment is carried out in time when the deviation exceeds 2 cm.
2. The construction method of the wide hanging basket according to claim 1, characterized in that phi 32 finish-rolled deformed steel bars and reserved holes are pre-embedded in a top plate of a No. 0 block, the upper structure of the hanging basket is assembled as required, a counter-force beam is placed at a design position after the completion, the finish-rolled deformed steel bars are lengthened to serve as pull rods, and anchor plates and anchor nuts are installed.
3. The wide hanging basket construction method according to claim 1, characterized in that a test loading process: the loading adopts a mode of symmetrical loading according to working conditions, the load is a box girder load, and a jack loading path is as follows: r2 (R2 ') → R3 (R3') → R4 (R4 ')) → R5 (R5') → R6 (R6 ') → R7 (R7')) → R8 (R8 ') → R9 → R1 (R1');
the test procedure was as follows:
the first step is as follows: laying elevation monitoring points, measuring and recording original elevation values;
the second step is that: respectively placing the two jacks to R2 and R2', starting the oil pump to load to a designed value, screwing down the anchoring nut, and removing the jacks; respectively moving the jack to the positions R3 and R3', loading, and screwing down the anchoring nut; sequentially moving to R2 (R2') to finish loading;
the third step: measuring and recording elevation values of elevation layout points;
the fourth step: and repeating the second step and the third step according to a monitoring program to complete the prepressing monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010742114.9A CN111778876A (en) | 2020-07-29 | 2020-07-29 | Construction method of wide hanging basket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010742114.9A CN111778876A (en) | 2020-07-29 | 2020-07-29 | Construction method of wide hanging basket |
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| Publication Number | Publication Date |
|---|---|
| CN111778876A true CN111778876A (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010742114.9A Pending CN111778876A (en) | 2020-07-29 | 2020-07-29 | Construction method of wide hanging basket |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007205090A (en) * | 2006-02-03 | 2007-08-16 | Okkusu Jack Kk | Transfer method of heavy load and its apparatus |
| CN102912738A (en) * | 2012-11-07 | 2013-02-06 | 北京市公路桥梁建设集团有限公司 | Overall prepressing device for hanging basket |
| CN103911957A (en) * | 2014-04-09 | 2014-07-09 | 中交隧道工程局有限公司 | Prestressed continuous box-girder cantilever construction basket |
| CN107034791A (en) * | 2017-06-27 | 2017-08-11 | 中交第三航务工程局有限公司 | A kind of assembling method of Cantilever Casting Construction Hanging Basket |
| CN107366234A (en) * | 2017-07-26 | 2017-11-21 | 中交公局第二工程有限公司 | A kind of constructing device that Hanging Basket is aided in using electric block |
-
2020
- 2020-07-29 CN CN202010742114.9A patent/CN111778876A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007205090A (en) * | 2006-02-03 | 2007-08-16 | Okkusu Jack Kk | Transfer method of heavy load and its apparatus |
| CN102912738A (en) * | 2012-11-07 | 2013-02-06 | 北京市公路桥梁建设集团有限公司 | Overall prepressing device for hanging basket |
| CN103911957A (en) * | 2014-04-09 | 2014-07-09 | 中交隧道工程局有限公司 | Prestressed continuous box-girder cantilever construction basket |
| CN107034791A (en) * | 2017-06-27 | 2017-08-11 | 中交第三航务工程局有限公司 | A kind of assembling method of Cantilever Casting Construction Hanging Basket |
| CN107366234A (en) * | 2017-07-26 | 2017-11-21 | 中交公局第二工程有限公司 | A kind of constructing device that Hanging Basket is aided in using electric block |
Non-Patent Citations (3)
| Title |
|---|
| 屈振学: "超宽PC箱梁大节段悬浇施工技术研究", 《桥梁工程》 * |
| 毋存粮等: "下导式无主桁斜拉挂篮在宽幅桥梁悬臂施工中的应用", 《施工技术》 * |
| 郭万辉: "高墩大跨连续刚构桥挂篮反力架预压施工技术", 《交通世界》 * |
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Application publication date: 20201016 |
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