CN111851326A - Method for quickly dismantling upper structure of cable-stayed bridge - Google Patents
Method for quickly dismantling upper structure of cable-stayed bridge Download PDFInfo
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- CN111851326A CN111851326A CN202010727766.5A CN202010727766A CN111851326A CN 111851326 A CN111851326 A CN 111851326A CN 202010727766 A CN202010727766 A CN 202010727766A CN 111851326 A CN111851326 A CN 111851326A
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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
The invention relates to the technical field of bridge demolition construction, in particular to a method for quickly demolishing an upper structure of a cable-stayed bridge, which comprises the following steps: (A) dividing beam sections; (B) determining the size and the soil penetration depth of the steel pipe pile (1); (C) drilling holes at proper positions of the beam body; (D) sinking the steel pipe pile to a specified depth; (E) releasing the stay cable and dismantling the beam section; (F) and hoisting the beam section to a specified position. According to the invention, the construction sequence of the cable-stayed bridge superstructure dismantling is optimized, the temporary support is realized through the steel pipe piles (1), the condition that the beam body is inclined laterally in the cable-stayed bridge superstructure dismantling process is avoided, the stability of the beam body in the dismantling process is ensured, the safety of the construction process is ensured, the construction period is shortened, the construction efficiency is improved, the construction cost is reduced, and the method can be popularized in actual engineering.
Description
Technical Field
The invention relates to a method for quickly dismantling an upper structure of a cable-stayed bridge, belonging to the technical field of bridge dismantling construction.
Background
A cable-stayed bridge is also called a diagonal tension bridge, is a bridge with a main beam directly pulled on a bridge tower by a plurality of guys, and is a structural system formed by combining a pressure-bearing tower, a pulled guy and a bending-bearing beam body. It can be seen as a multi-span elastically supported continuous beam with guy cables instead of buttresses. It can reduce the bending moment in the beam body, reduce the building height, lighten the structural weight and save materials. The cable-stayed bridge has mature manufacturing process and good spanning capability, so the cable-stayed bridge is mainly used for spanning large rivers without influencing navigation, and plays an important role in improving the traffic of 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. Part of the bridges need to be dismantled or rebuilt due to design life, traffic planning deployment, self-damage and the like, wherein the cable-stayed bridge occupies one part of the bridges. In the construction process of dismantling the upper structure of the cable-stayed 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 meanwhile, a large amount of dust can be generated in the construction process to cause huge pollution to the environment and generate a large amount of construction waste after construction, so that the cleaning work is extremely difficult and a large amount of time and money are consumed.
Disclosure of Invention
In order to solve the problems, the invention provides a method for quickly dismantling the upper structure of a cable-stayed bridge. The invention is realized by the following technical scheme.
The invention provides a method for quickly dismantling an upper structure of a cable-stayed bridge, which comprises the following steps:
(A) dividing beam sections: dividing the existing bridge into a plurality of beam sections by taking the joint positions of all sections as secants when the beam body is poured, and simultaneously determining the lifting sequence of all the beam sections;
(B) determining the size and the soil penetration depth of the steel pipe pile (1): calculating the mass of the beam body according to the length of the beam body segment, and calculating the soil penetration depth of the steel pipe pile according to the geological condition of the position of the bridge, the mass of the beam body, the construction load, personnel and wind load;
(C) drilling at a proper position of the beam body: drilling holes in the longitudinal direction and the transverse direction of the bridge according to the size of the steel pipe pile according to the length of the section of the beam body;
(D) sinking the steel pipe pile to a specified depth: the steel pipe pile sinks to the calculated soil penetration depth through a hole drilled in the beam body, the steel pipe pile with a certain size is exposed at the top of the beam body, web ribbed H-shaped steel (3) is used as a distribution beam, holes are formed in the web ribbed H-shaped steel and the beam body, the web ribbed H-shaped steel and the beam body are connected into a whole by using a temporary fixing structure (2), the beam body and other loads are applied to the steel pipe pile after the stay cable is released, and the beam body and other loads are applied to the steel pipe pile after the stay cable is released;
(E) releasing the stay cable and dismantling the beam section: releasing the stay cable corresponding to the beam section fixed in the step (D), and then dismantling the beam section;
(F) hoisting the beam section to a specified position: and (C) hoisting the beam sections according to the hoisting sequence determined in the step (A) by using a floating crane or a crane, 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 hoisting the beam body 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 cable-stayed bridge is characterized in that the machine tool for drilling the beam body in the step (C) is a concrete drilling machine or a concrete core drilling machine; the number of the holes is reasonably selected and distributed according to the longitudinal and transverse sizes of the beam sections and the size of the steel pipe pile.
And (D) the equipment for sinking the pile in the step (D) is a pile driver.
The method for quickly dismantling the superstructure of a cable-stayed bridge according to claim 1, wherein the temporary fixation structure (2) in step (D) is composed of finish-rolled twisted steel (3), a nut (4) and a gasket (5).
The method for quickly dismantling the upper structure of the cable-stayed bridge comprises the step (D) of adopting web ribbed H-shaped steel as a distribution beam, and connecting the web ribbed H-shaped steel (6) with a beam body by using a temporary fixing structure (2) to form a whole.
The invention has the following beneficial effects: through the temporary support (1) of the steel pipe pile, the condition that the beam body topples laterally in the process of dismantling the upper structure of the cable-stayed bridge is avoided, the stability of the beam body in the dismantling 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, the construction cost is reduced, and the temporary support can be popularized in actual engineering.
Drawings
FIG. 1 is a flow chart of a method for quick removal of a superstructure of a cable-stayed bridge;
FIG. 2 is a schematic longitudinal section of a support structure for arranging steel pipe piles;
FIG. 3 is a schematic cross-sectional view of a support structure provided with steel pipe piles;
FIG. 4 is a schematic longitudinal section view of the connection of the H-shaped steel with the web ribbed and the temporary fixing structure;
1. steel pipe piles; 2. a temporary fixation structure; 3. finish rolling the twisted steel; 4. a nut; 5. a gasket; 6. h-shaped steel with ribbed web plates; 7. a beam body.
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 joint positions of all sections as secants when the beam body is poured, and simultaneously determining the lifting sequence of all the beam sections;
(B) determining the size and the soil penetration depth of the steel pipe pile (1): calculating the mass of the beam body according to the length of the beam body segment, and calculating the soil penetration depth of the steel pipe pile according to the geological condition of the position of the bridge, the mass of the beam body, the construction load, personnel and wind load;
(C) drilling at a proper position of the beam body: drilling holes in the longitudinal direction and the transverse direction of the bridge according to the size of the steel pipe pile according to the length of the section of the beam body;
(D) sinking the steel pipe pile to a specified depth: the steel pipe pile sinks to the calculated soil penetration depth through a hole drilled in the beam body, the steel pipe pile with a certain size is exposed at the top of the beam body, web ribbed H-shaped steel (3) is used as a distribution beam, holes are formed in the web ribbed H-shaped steel and the beam body, the web ribbed H-shaped steel and the beam body are connected into a whole by using a temporary fixing structure (2), the beam body and other loads are applied to the steel pipe pile after the stay cable is released, and the beam body and other loads are applied to the steel pipe pile after the stay cable is released;
(E) releasing the stay cable and dismantling the beam section: releasing the stay cable corresponding to the beam section fixed in the step (D), and then dismantling the beam section;
(F) hoisting the beam section to a specified position: and (C) hoisting the beam sections according to the hoisting sequence determined in the step (A) by using a floating crane or a crane, 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 hoisting the beam body 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 cable-stayed bridge is characterized in that the machine tool for drilling the beam body in the step (C) is a concrete drilling machine or a concrete core drilling machine; the number of the holes is reasonably selected and distributed according to the longitudinal and transverse sizes of the beam sections and the size of the steel pipe pile.
And (D) the equipment for sinking the pile in the step (D) is a pile driver.
The method for quickly dismantling the superstructure of a cable-stayed bridge according to claim 1, wherein the temporary fixation structure (2) in step (D) is composed of finish-rolled twisted steel (3), a nut (4) and a gasket (5).
The method for quickly dismantling the upper structure of the cable-stayed bridge comprises the step (D) of adopting web ribbed H-shaped steel as a distribution beam, and connecting the web ribbed H-shaped steel (6) with a beam body by using a temporary fixing structure (2) to form a whole.
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 for rapidly dismantling the superstructure of a cable-stayed bridge is characterized by comprising the following steps:
(A) dividing beam sections: dividing the existing bridge into a plurality of beam sections by taking the joint positions of all sections as secants when the beam body is poured, and simultaneously determining the lifting sequence of all the beam sections;
(B) determining the size and the soil penetration depth of the steel pipe pile (1): calculating the mass of the beam body according to the length of the beam body segment, and calculating the soil penetration depth of the steel pipe pile according to the geological condition of the position of the bridge, the mass of the beam body, the construction load, personnel and wind load;
(C) drilling at a proper position of the beam body: drilling holes in the longitudinal direction and the transverse direction of the bridge according to the size of the steel pipe pile according to the length of the section of the beam body;
(D) sinking the steel pipe pile to a specified depth: sinking the steel pipe pile to the calculated soil penetration depth through a hole drilled in the beam body, exposing the steel pipe pile with a certain size at the top of the beam body, using web ribbed H-shaped steel (6) as a distribution beam, forming holes in the web ribbed H-shaped steel and the beam body, and connecting the web ribbed H-shaped steel with the beam body into a whole by using a temporary fixing structure (2);
(E) releasing the stay cable and dismantling the beam section: firstly, releasing the stay cables fixed at the corresponding positions of the beam sections in the step (D), and then dismantling the beam sections;
(F) hoisting the beam section to a specified position: and (C) hoisting the beam sections according to the hoisting sequence determined in the step (A) by using a floating crane or a crane, 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 hoisting the beam body to a specified position, and repeating the process until all the beam sections are hoisted.
2. A method for quickly dismantling the superstructure of a cable-stayed bridge according to claim 1, wherein the drilling machine for the step (C) is a concrete drilling machine or a concrete core drilling machine; the number of the holes is reasonably selected and distributed according to the longitudinal and transverse sizes of the beam sections and the size of the steel pipe pile.
3. A method for quickly dismantling a cable-stayed bridge superstructure according to claim 1, characterized in that the apparatus for sinking the piles in the step (D) is a pile driver.
4. A method for quick dismantling of a cable-stayed bridge superstructure according to claim 1, characterized in that the temporary fixing structure (2) in step (D) consists of finish-rolled twisted steel (3), nuts (4) and washers (5).
5. A method for quick dismantling of a cable-stayed bridge superstructure according to claim 1, characterized in that in step (D) a web-ribbed H-section steel is used as the distributor beam, and the web-ribbed H-section steel (6) is connected to the beam body using a temporary fixing structure (2) so that they form one unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010727766.5A CN111851326A (en) | 2020-07-24 | 2020-07-24 | Method for quickly dismantling upper structure of cable-stayed bridge |
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| CN202010727766.5A CN111851326A (en) | 2020-07-24 | 2020-07-24 | Method for quickly dismantling upper structure of cable-stayed bridge |
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| CN202010727766.5A Pending CN111851326A (en) | 2020-07-24 | 2020-07-24 | Method for quickly dismantling upper structure of cable-stayed bridge |
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Citations (8)
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| JPH07102524A (en) * | 1993-10-08 | 1995-04-18 | Shimizu Corp | Method for building concrete cable-stayed bridge and form supporting truck using the same |
| JP2009299418A (en) * | 2008-06-17 | 2009-12-24 | Kajima Corp | Retreating and removing method and retreating device for travelling work vehicle for cantilever construction |
| JP2014190107A (en) * | 2013-03-28 | 2014-10-06 | Noda Jidosha Kogyosho:Kk | Method of building bridge girder, removal method, and apparatus for constructing bridge girder |
| CN104727236A (en) * | 2015-02-06 | 2015-06-24 | 武汉二航路桥特种工程有限责任公司 | Whole striding bridge lowering dismounting system based on ground supporting and construction method thereof |
| CN204676438U (en) * | 2015-04-28 | 2015-09-30 | 武汉二航路桥特种工程有限责任公司 | The overall chalaza Hoisting System of multi-span girder bridge |
| CN109695206A (en) * | 2019-02-22 | 2019-04-30 | 中国水利水电第八工程局有限公司 | A kind of dilute cable system cable-stayed bridge superstructure method for dismounting waterborne |
| CN110552296A (en) * | 2019-09-20 | 2019-12-10 | 上海浦东新区公路建设发展有限公司 | Cable-stayed bridge dismantling construction method |
| CN110792044A (en) * | 2019-08-22 | 2020-02-14 | 中铁十二局集团有限公司 | Construction method for quickly dismantling overpass |
-
2020
- 2020-07-24 CN CN202010727766.5A patent/CN111851326A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07102524A (en) * | 1993-10-08 | 1995-04-18 | Shimizu Corp | Method for building concrete cable-stayed bridge and form supporting truck using the same |
| JP2009299418A (en) * | 2008-06-17 | 2009-12-24 | Kajima Corp | Retreating and removing method and retreating device for travelling work vehicle for cantilever construction |
| JP2014190107A (en) * | 2013-03-28 | 2014-10-06 | Noda Jidosha Kogyosho:Kk | Method of building bridge girder, removal method, and apparatus for constructing bridge girder |
| CN104727236A (en) * | 2015-02-06 | 2015-06-24 | 武汉二航路桥特种工程有限责任公司 | Whole striding bridge lowering dismounting system based on ground supporting and construction method thereof |
| CN204676438U (en) * | 2015-04-28 | 2015-09-30 | 武汉二航路桥特种工程有限责任公司 | The overall chalaza Hoisting System of multi-span girder bridge |
| CN109695206A (en) * | 2019-02-22 | 2019-04-30 | 中国水利水电第八工程局有限公司 | A kind of dilute cable system cable-stayed bridge superstructure method for dismounting waterborne |
| CN110792044A (en) * | 2019-08-22 | 2020-02-14 | 中铁十二局集团有限公司 | Construction method for quickly dismantling overpass |
| CN110552296A (en) * | 2019-09-20 | 2019-12-10 | 上海浦东新区公路建设发展有限公司 | Cable-stayed bridge dismantling construction method |
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