CN112342937A - A method of quickly dismantling the superstructure of a T-shaped girder bridge - Google Patents
A method of quickly dismantling the superstructure of a T-shaped girder bridge Download PDFInfo
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- CN112342937A CN112342937A CN201910737548.7A CN201910737548A CN112342937A CN 112342937 A CN112342937 A CN 112342937A CN 201910737548 A CN201910737548 A CN 201910737548A CN 112342937 A CN112342937 A CN 112342937A
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
本发明涉及桥梁拆除施工技术领域，具体涉及一种快速拆除T形梁桥上部结构的方法，包括以下步骤：(A)划分梁段；(B)设置横向临时支撑(1)；(C)拆除伸缩缝；(D)拆除铰缝(6)，切割分离各个梁段；(E)吊运梁段至指定处。本发明中，优化了传统T形梁桥上部结构的拆除的施工顺序，通过设置横向临时支撑(1)，避免了T形梁桥上部结构拆除过程中可能出现T梁侧向倾覆的情况，保证了拆除过程中T梁的稳定性，确保了施工过程的安全，同时也优化了施工工序，缩短了施工工期，提高了施工效率，降低了施工成本，可以在实际工程中推广。
The invention relates to the technical field of bridge dismantling construction, in particular to a method for rapidly dismantling an upper structure of a T-shaped girder bridge, comprising the following steps: (A) dividing beam sections; (B) setting transverse temporary supports (1); (C) dismantling Expansion joints; (D) Remove hinge joints (6), and cut and separate beam sections; (E) Lift and transport beam sections to designated places. In the present invention, the construction sequence of the dismantling of the upper structure of the traditional T-shaped girder bridge is optimized, and the lateral temporary support (1) is arranged to avoid the possible lateral overturning of the T-beam during the dismantling of the upper structure of the T-shaped girder bridge. The stability of the T beam during the demolition process is ensured, the safety of the construction process is ensured, the construction process is optimized, the construction period is shortened, the construction efficiency is improved, and the construction cost is reduced, which can be promoted in practical projects.
Description
Technical Field
The invention relates to a method for quickly dismantling an upper structure of a T-shaped beam bridge, and belongs to the technical field of bridge dismantling construction.
Background
The T-shaped beam bridge is a beam bridge with a T-shaped beam as a main load-bearing structure. T-beam refers to a beam having a T-shaped cross-section. The two side parts are called flanges, and the middle part is called a beam rib. The form is formed by digging out the concrete in the tension area of the rectangular beam which does not work against the bending bearing capacity, compared with the original rectangular beam, the form has the same bending bearing capacity, and simultaneously can save the concrete consumption and reduce the self weight of the structure. The T-beam is simple to manufacture, mature in process, clear in stress and good in crossing capacity, so that the bridge type is largely built on roads in China and plays an important role in improving road traffic in China.
With the rapid development of national economy, the traffic volume is greatly increased, and the requirements of people on bridges are higher and higher. Some bridges, of which a large part is occupied by T-beam bridges, need to be dismantled or rebuilt for reasons of design life, traffic planning deployment, self-hazards, etc. In the process of dismantling the upper structure of the T-shaped beam bridge, blasting or mechanical chiseling methods are generally adopted, but the methods often generate larger noise to seriously affect the lives of local residents, and simultaneously, a large amount of dust can be generated in the process of constructing to cause huge pollution to the environment, and the work of cleaning the construction waste generated after construction is extremely difficult. The T-shaped girder bridge is also dismantled by adopting a static cutting mode, but in the dismantling process, in order to ensure the stability of the dismantled girder section and prevent overturning, the traditional procedure is to firstly cut a girder section and then hoist the girder section. And then cutting the next beam section again, and then the hoisting equipment can continue hoisting only after the cutting is finished, thereby causing great machine resource waste and prolonging the construction period.
Disclosure of Invention
To solve the above problems, the present invention provides a method for quickly removing a superstructure of a T-beam bridge.
The invention is realized by the following technical scheme.
The invention provides a method for quickly dismantling an upper structure of a T-shaped beam bridge, which comprises the following steps:
(A) dividing beam sections: dividing the existing bridge into a plurality of beam sections by taking the existing bridge expansion joints and the hinge joints as secants, and simultaneously determining the hoisting sequence of each beam section;
(B) setting a transverse temporary support: the transverse temporary supports are arranged at the flanges of every two adjacent T-shaped beams and are perpendicular to the hinge joints, and the number of the transverse temporary supports arranged on every two adjacent T-shaped beams is determined according to the length of the T-shaped beams;
(C) dismantling the expansion joint: dismantling all expansion joints of the existing bridge, ensuring that all spans of the T-shaped beam are separated from each other and not influenced mutually;
(D) removing the hinge joint, and cutting and separating each beam section: before removing the hinge joints, drilling 4 hoisting holes on each beam section by using a drilling machine, then removing all the hinge joints to separate each beam section, temporarily removing the transverse temporary supports when encountering the blocking of the arranged transverse temporary supports during the removal of the hinge joints, fixing the transverse temporary supports on the beam sections after partially removing the transverse temporary supports, and ensuring the stability of the T-shaped beam in the removal process by the temporary transverse supports during the removal of the hinge joints by maintaining the transverse connection of each adjacent beam section;
(E) hoisting the beam section to a specified position: and (C) hoisting by using a floating crane or a crane according to the hoisting sequence of the beam sections determined in the step (A), firstly, enabling the steel wire rope to pass through the drilled holes on the beam sections and be fixed with the floating crane or the crane, then, dismantling the T beam to be hoisted and the transverse temporary support arranged on the adjacent T beam, hoisting the T beam to a specified position, and repeating the process until all the beam sections are hoisted.
The method for quickly dismantling the upper structure of the T-shaped beam bridge is characterized in that in the step (B), the transverse temporary support consists of a cross beam, a bolt, a nut and a gasket, the cross beam is fixed with a flange plate of the T-shaped beam through the bolt, the nut and the gasket to form the transverse temporary support, and the cross beam is I-shaped steel or channel steel.
The method for quickly removing the upper structure of the T-shaped beam bridge comprises the step (C) of removing the expansion joint by using an air pick and a diamond disc saw or a rope saw.
The method for quickly dismantling the upper structure of the T-shaped beam bridge comprises the step (D) of adopting a hydraulic rotary or core drilling machine as a drilling machine, wherein 4 hoisting holes are symmetrical in pairs in the transverse direction and the longitudinal direction.
The method for quickly dismantling the upper structure of the T-shaped beam bridge comprises the step (D) of dismantling the hinge joint by using an air pick, gas cutting and a diamond butterfly saw or a rope saw.
The invention has the following beneficial effects: through setting up horizontal interim support, avoided T roof beam bridge superstructure to demolish the condition that the in-process probably appears the T roof beam lateral toppling, guaranteed the stability of demolising in-process T roof beam, ensured the safety of work progress, shortened construction period, improved the efficiency of construction, reduced construction cost, can promote in actual engineering.
Drawings
FIG. 1 is a flow diagram of a method of quickly removing a superstructure of a T-beam bridge;
FIG. 2 is an elevational schematic view of a T-beam with transverse temporary supports
FIG. 3 is a schematic cross-sectional view of a T-beam with transverse temporary supports;
FIG. 4 is a partial cross-sectional view of a T-beam with transverse temporary supports.
1. Transverse temporary support; 2. a cross beam; 3. a bolt; 4. a nut; 5. a gasket; 6. and (6) hinging and sewing.
Detailed Description
For a more complete understanding of the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Referring to fig. 1, in one embodiment of the present invention, a method for quickly removing a superstructure of a T-beam bridge includes the steps of:
(A) dividing beam sections: dividing the existing bridge into a plurality of beam sections by taking the existing bridge expansion joints and the hinge joints 6 as secants, and simultaneously determining the lifting sequence of each beam section;
(B) setting a transverse temporary support 1: the transverse temporary supports 1 are arranged at the flanges of two adjacent T-shaped beams and are perpendicular to the hinge joints 6, and the number of the transverse temporary supports 1 arranged on each two adjacent T-shaped beams is determined according to the length of the T-shaped beams;
(C) dismantling the expansion joint: dismantling all expansion joints of the existing bridge, ensuring that all spans of the T-shaped beam are separated from each other and not influenced mutually;
(D) removing the hinge joint 6, and cutting and separating each beam section: before removing the hinge joints 6, drilling 4 hoisting holes on each beam section by using a drilling machine, then removing all the hinge joints 6 to separate each beam section, temporarily removing the transverse temporary supports 1 when the set transverse temporary supports 1 block when removing the hinge joints 6, fixing the transverse temporary supports 1 on the beam sections after partially removing the hinge joints 6, and ensuring the stability of the T-shaped beam in the removing process by the temporary transverse supports 1 in order to keep the transverse connection of each adjacent beam section in the removing process of the hinge joints 6;
(E) hoisting the beam section to a specified position: and (C) hoisting by using a floating crane or a crane according to the hoisting sequence of the beam sections determined in the step (A), firstly, enabling the steel wire rope to pass through the drilled holes on the beam sections and be fixed with the floating crane or the crane, then, dismantling the T beam to be hoisted and the transverse temporary support 1 arranged on the adjacent T beam, hoisting the T beam to a specified position, and repeating the process until all the beam sections are hoisted.
The method for quickly dismantling the upper structure of the T-shaped beam bridge is characterized in that in the step (B), the transverse temporary support 1 is composed of a cross beam 2, a bolt 3, a nut 4 and a gasket 5, the cross beam 2 is fixed with a flange plate of the T-shaped beam through the bolt 3, the nut 4 and the gasket 5 to form the transverse temporary support 1, and the cross beam 2 is I-shaped steel or channel steel.
The method for quickly removing the upper structure of the T-shaped beam bridge comprises the step (C) of removing the expansion joint by using an air pick and a diamond disc saw or a rope saw.
The method for quickly dismantling the upper structure of the T-shaped beam bridge comprises the step (D) of adopting a hydraulic rotary or core drilling machine as a drilling machine, wherein 4 hoisting holes are symmetrical in pairs in the transverse direction and the longitudinal direction.
In the method for quickly dismantling the upper structure of the T-shaped beam bridge, in the step (D), the hinge joint 6 dismantling machine is a pneumatic pick, a gas cutting machine and a diamond butterfly saw or a rope saw.
The invention is not limited to the specific embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (5)
1. A method of quickly removing a superstructure of a T-beam bridge, comprising the steps of:
(A) dividing beam sections: dividing the existing bridge into a plurality of beam sections according to the cutting lines of the expansion joints and the hinge joints (6) of the existing bridge, and simultaneously determining the hoisting sequence of each beam section;
(B) setting a transverse temporary support (1): the transverse temporary supports (1) are arranged at the flanges of every two adjacent T-shaped beams and are perpendicular to the hinge joints (6), and the number of the transverse temporary supports (1) arranged on every two adjacent T-shaped beams is determined according to the length of the T-shaped beams;
(C) dismantling the expansion joint: dismantling all expansion joints of the existing bridge, ensuring that all spans of the T-shaped beam are separated from each other and not influenced mutually;
(D) removing the hinge joints (6), and cutting and separating each beam section: before removing the hinge joints (6), drilling 4 hoisting holes on each beam section by using a drilling machine, then removing all the hinge joints (6) to separate each beam section, temporarily removing the transverse temporary supports (1) when the transverse temporary supports (1) are blocked when the hinge joints (6) are removed, fixing the transverse temporary supports (1) on the beam sections after partial removal of the transverse temporary supports, and ensuring the stability of the T-shaped beam in the removing process by the temporary transverse supports (1) when the hinge joints (6) are removed;
(E) hoisting the beam section to a specified position: and (C) hoisting by using a floating crane or a crane according to the hoisting sequence of the beam sections determined in the step (A), firstly, enabling the steel wire rope to pass through the drilled holes on the beam sections and be fixed with the floating crane or the crane, then, dismantling the T beam to be hoisted and the transverse temporary support (1) arranged on the adjacent T beam, then hoisting the T beam to a specified position, and repeating the process until all the beam sections are hoisted and hoisted.
2. A method for rapidly dismantling a superstructure of a T-beam bridge according to claim 1, wherein in step (B) said transverse temporary support (1) is composed of a beam (2), a bolt (3), a nut (4) and a washer (5), the beam (2) is fixed with a flange plate of the T-beam by the bolt (3), the nut (4) and the washer (5) to form the transverse temporary support (1), wherein the beam (1) is an i-beam or a channel.
3. A method of quickly demolishing a superstructure of a T-beam bridge as recited in claim 1, wherein the means for demolishing the expansion joints in step (C) are a pick and a diamond disc saw or a wire saw.
4. A method of quickly demolishing a superstructure of a T-beam bridge as recited in claim 1, wherein the drilling tool of step (D) is a hydraulic rotary or core drill, 4 lifting holes being symmetrical in pairs in the lateral and longitudinal directions.
5. A method of quickly demolishing a T-beam bridge superstructure according to claim 1, wherein step (D) the hinge joint (6) demolition tools are pick, gas cutting, and diamond bowden or wire saw.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910737548.7A CN112342937A (en) | 2019-08-09 | 2019-08-09 | A method of quickly dismantling the superstructure of a T-shaped girder bridge |
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| CN201910737548.7A CN112342937A (en) | 2019-08-09 | 2019-08-09 | A method of quickly dismantling the superstructure of a T-shaped girder bridge |
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| CN112342937A true CN112342937A (en) | 2021-02-09 |
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Cited By (2)
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| CN114508057A (en) * | 2022-03-08 | 2022-05-17 | 中国建筑第六工程局有限公司 | Method for dismantling small concrete T-beam type bridge crossing obstacles |
| CN115058990A (en) * | 2022-08-08 | 2022-09-16 | 中建七局交通建设有限公司 | A dismantling method for a double-span T-shaped cast-in-situ bridge under the construction condition of a single-span height limit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508057A (en) * | 2022-03-08 | 2022-05-17 | 中国建筑第六工程局有限公司 | Method for dismantling small concrete T-beam type bridge crossing obstacles |
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| CN115058990A (en) * | 2022-08-08 | 2022-09-16 | 中建七局交通建设有限公司 | A dismantling method for a double-span T-shaped cast-in-situ bridge under the construction condition of a single-span height limit |
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Application publication date: 20210209 |