CN111172902A - Construction method for quickly dismantling box girder bridge without support - Google Patents
Construction method for quickly dismantling box girder bridge without support Download PDFInfo
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- CN111172902A CN111172902A CN202010024140.8A CN202010024140A CN111172902A CN 111172902 A CN111172902 A CN 111172902A CN 202010024140 A CN202010024140 A CN 202010024140A CN 111172902 A CN111172902 A CN 111172902A
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- cutting
- dismantling
- box girder
- bottom plate
- top plate
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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
Abstract
The invention relates to the technical field of bridge demolition construction, in particular to a construction method for rapidly demolishing a box girder bridge without a support, which comprises the following steps: (A) temporarily anchoring the bridge pier; (B) cutting and removing the flange plate; (C) cutting and removing the top plate and the bottom plate; (D) cutting and removing the residual web part; (E) cutting and dismantling the pier anchoring section; (F) and (4) dismantling the upright post. The invention provides a construction method for quickly dismantling a box girder bridge without a support, which is characterized in that a temporary consolidation measure is arranged at a pier, then the bridge is reasonably cut and dismantled, the process of arranging the support is omitted in the dismantling process, the construction period is shortened, the construction efficiency is improved, the construction cost is reduced, and the construction method can be popularized in actual engineering.
Description
Technical Field
The invention relates to a construction method for quickly dismantling a box girder bridge without a support, belonging to the technical field of bridge dismantling construction.
Background
With the rapid increase of traffic volume in recent years, the requirements of bridges are also increased correspondingly. And part of the box girder bridge needs to be dismantled and rebuilt due to design life, traffic planning deployment, self-damage and the like. In the construction process of dismantling the upper structure of the box girder bridge, the static force cutting dismantling mode is preferably selected in consideration of the communication protection and the influence on the surrounding environment. In the traditional static force cutting and dismantling method, in order to ensure the stability and the construction safety of a bridge in the bridge dismantling process, a support is erected before dismantling construction. Therefore, the construction period of bridge dismantling engineering is inevitably prolonged, and the dismantling cost is also increased.
Disclosure of Invention
In order to solve the problems, the invention provides a construction method for quickly dismantling a box girder bridge without a support. Through setting up the temporary consolidation measure in pier department, then reasonable cutting is demolishd the girder bridge, removes this process of setting up the support from demolising the in-process, has shortened construction period, has improved the efficiency of construction, has reduced construction cost, can promote in actual engineering.
The invention is realized by the following technical scheme.
The invention provides a construction method for quickly dismantling a box girder bridge without a support, which comprises the following steps:
(A) temporarily anchoring the pier: the bridge pier of the bridge to be dismantled is temporarily consolidated, so that the box girder is prevented from overturning in the dismantling process;
(B) cutting and removing the flange plate: dividing the flange plates according to the scale of the box girder bridge and the specification of the crane and determining the sequence; drilling a lifting hole on the flange plate, fixing a steel wire rope with a crane after penetrating through the lifting hole on the flange plate, and cutting according to the cutting sequence; then hoisting the cut flange plates to the appointed position
(C) Cutting and removing the top plate and the bottom plate: the cutting shape of the top plate and the bottom plate is rectangular, the length and the width are determined according to the scale of the box girder bridge and the specification of the crane, and the dismantling sequence is determined; then, drilling lifting holes at corresponding positions of a top plate and a bottom plate of the bridge deck, and simultaneously penetrating a steel wire rope into the top plate and the bottom plate and fixing the steel wire rope with a crane; simultaneously cutting the top plate and the bottom plate, and simultaneously hoisting to a specified position after cutting; repeating the above processes until the top plate and the bottom plate are removed;
(D) cutting and removing the residual web part: dividing the web plate and the rest part of the top plate and the bottom plate according to the scale of the box girder bridge and the specification of the crane and determining the sequence; then drilling a lifting hole at the position corresponding to the web plate, and simultaneously penetrating a steel wire rope into the web plate to be fixed with a crane; then cutting is carried out, and the cut part is lifted to a designated position; and repeating the process until the web and the rest of the bottom plate of the top plate are completely removed.
(E) Cutting and dismantling the pier anchoring section: dividing and determining the sequence according to the size of the pier anchoring section and the specification of the crane; then, the cut part is lifted to a designated position after cutting; for the hoisting of the beam section at the anchoring part, the beam section is fixed with a crane, and then the temporary anchoring is removed and the beam section is hoisted; and repeating the processes until the end of the process, and finishing the bridge dismantling construction.
The construction method for rapidly dismantling the box girder bridge without the support comprises the step (B), (C), (D) and (E) that the cutting equipment is a rope saw.
The construction method for rapidly dismantling the box girder bridge without the support adopts a four-point hoisting mode in the steps (B), (C), (D) and (E).
In the construction method for quickly dismantling the box girder bridge without the support, when the top plate and the bottom plate are simultaneously cut in the step (C), an inclined cutting mode is adopted, and the length-width ratio of the cut bottom plate to the length-width ratio of the cut top plate is 10-25 cm smaller.
In the construction method for rapidly dismantling the box girder bridge without the support, the bottom plate in the step (C) is cut firstly and then is stopped, at the moment, the cutting-finished bottom plate needs to be hoisted to the lower height of the top plate by the crane firstly, then, the cutting is continued, and the top plate and the bottom plate are hoisted to the appointed position together after the top plate is cut.
In the construction method for rapidly dismantling the box girder bridge without the support, if the weight of the anchoring beam section is within the hoisting range of the crane in the step (E), temporary anchoring can be directly removed for hoisting and dismantling.
In the construction method for rapidly dismantling the box girder bridge without the support, if the weight of the anchoring girder section is out of the hoisting range of the crane in the step (E), the cutting and dismantling sequence should firstly cut and dismantle from two sides, and finally, the rest of the anchoring girder section should be hoisted and dismantled.
The invention has the following beneficial effects: through setting up interim anchor equipment and dismantling reasonable construction process in-process at pier department before dismantling, the effectual case roof beam situation that topples that probably appears in the in-process of having avoided box girder bridge superstructure to dismantle has guaranteed the stability of dismantling in-process box roof beam, has ensured the safety of work progress. Meanwhile, the method is used for demolishing, so that the erection of a support can be omitted, the construction period of demolishing work is saved, and certain cost is saved. Can be popularized in practical engineering.
Drawings
FIG. 1 is a flow chart of a construction method for quick removal of a box girder bridge without a bracket;
FIG. 2 is a schematic elevation view after completion of step C;
FIG. 3 is a partial plan view of step C after completion;
fig. 4 is a schematic cross-sectional view of the floor being lifted.
In the drawings, 1 is a top plate; 2 is a web plate; 3 is a bottom plate; and 4 is a steel wire rope.
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 the drawings, in an embodiment of the present invention, a construction method for quickly removing a box girder bridge without a bracket specifically includes the following steps:
the invention provides a construction method for quickly dismantling a box girder bridge without a support, which comprises the following steps:
(A) temporarily anchoring the pier: the bridge pier of the bridge to be dismantled is temporarily consolidated, so that the box girder is prevented from overturning in the dismantling process;
(B) cutting and removing the flange plate: dividing the flange plates according to the scale of the box girder bridge and the specification of the crane and determining the sequence; then drilling a hoisting hole on the flange plate, fixing the steel wire rope 4 with a crane through the hoisting hole on the flange plate, and cutting according to the cutting sequence; then hoisting the cut flange plates to the appointed position
(C) Cutting and removing the top plate and the bottom plate: the cutting shape of the bottom plate 3 of the top plate 1 is rectangular, the length and the width are determined according to the scale of the box girder bridge and the specification of the crane, and the dismantling sequence is determined; then, drilling lifting holes at corresponding positions of a top plate 1 and a bottom plate 3 of the bridge floor, and simultaneously penetrating a steel wire rope 4 into the top plate 1 and the bottom plate 3 and fixing the steel wire rope with a crane; simultaneously cutting the top plate 1 and the bottom plate 3, and simultaneously lifting to a specified position after cutting; repeating the process until the top plate 1 and the bottom plate 3 are completely removed;
(D) cutting and removing the residual web part: dividing the rest parts of the web plate 2 and the bottom plate 3 of the top plate 1 according to the scale of the box girder bridge and the specification of the crane and determining the sequence; then, drilling a lifting hole at the position corresponding to the web 2, and simultaneously penetrating a steel wire rope 4 into the web 2 to be fixed with a crane; then cutting is carried out, and the cut part is lifted to a designated position; the above process is repeated until the web 2 and the remainder of the bottom panel 3 of the top panel 1 are removed.
(E) Cutting and dismantling the pier anchoring section: dividing and determining the sequence according to the size of the pier anchoring section and the specification of the crane; then, the cut part is lifted to a designated position after cutting; for the hoisting of the beam section at the anchoring part, the beam section is fixed with a crane, and then the temporary anchoring is removed and the beam section is hoisted; and repeating the processes until the end of the process, and finishing the bridge dismantling construction.
The construction method for rapidly dismantling the box girder bridge without the support comprises the step (B), (C), (D) and (E) that the cutting equipment is a rope saw.
The construction method for rapidly dismantling the box girder bridge without the support adopts a four-point hoisting mode in the steps (B), (C), (D) and (E).
In the construction method for rapidly dismantling the box girder bridge without the support, in the step (C), the top plate 1 and the bottom plate 3 are cut simultaneously in an inclined cutting mode, and the length-width ratio of the cut bottom plate 3 is 10 cm-25 cm smaller than that of the cut top plate 1.
According to the construction method for rapidly dismantling the box girder bridge without the support, in the step (C), the bottom plate 3 is cut firstly and then is stopped, at the moment, the cutting-finished bottom plate 3 needs to be hoisted to the height below the top plate 1 by the crane firstly, then, the cutting is continued, and the top plate 1 and the bottom plate 3 are hoisted to the appointed position together after the top plate 1 is also cut.
In the construction method for rapidly dismantling the box girder bridge without the support, if the weight of the anchoring beam section is within the hoisting range of the crane in the step (E), temporary anchoring can be directly removed for hoisting and dismantling.
In the construction method for rapidly dismantling the box girder bridge without the support, if the weight of the anchoring girder section is out of the hoisting range of the crane in the step (E), the cutting and dismantling sequence should firstly cut and dismantle from two sides, and finally, the rest of the anchoring girder section should be hoisted and dismantled.
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 (7)
1. A construction method for quickly dismantling a box girder bridge without a support is characterized by comprising the following steps:
(A) temporarily anchoring the pier: the bridge pier of the bridge to be dismantled is temporarily consolidated, so that the box girder is prevented from overturning in the dismantling process;
(B) cutting and removing the flange plate: dividing the flange plates according to the scale of the box girder bridge and the specification of the crane and determining the sequence; then drilling a hoisting hole on the flange plate, fixing a steel wire rope (4) with a crane through the hoisting hole on the flange plate, and cutting according to the cutting sequence; then hoisting the cut flange plates to a designated position; repeating the process until the flange plate is completely removed;
(C) cutting and removing the top plate and the bottom plate: the cutting shape of the bottom plate (3) of the top plate (1) is rectangular, the length and the width are determined according to the scale of the box girder bridge and the specification of the crane, and the dismantling sequence is determined; then, drilling lifting holes at corresponding positions of a top plate (1) and a bottom plate (3) of the bridge floor, and simultaneously penetrating a steel wire rope (4) into the top plate (1) and the bottom plate (3) and fixing the steel wire rope with a crane; simultaneously cutting the top plate (1) and the bottom plate (3), and simultaneously hoisting to a specified position after cutting; repeating the processes until the top plate (1) and the bottom plate (3) are completely removed;
(D) cutting and removing the residual web part: dividing the rest parts of the web plate (2) and the bottom plate (3) of the top plate (1) according to the scale of the box girder bridge and the specification of the crane and determining the sequence; then, drilling a lifting hole at the position corresponding to the web plate (2), and simultaneously penetrating a steel wire rope (4) into the web plate (2) to be fixed with a crane; then cutting is carried out, and the cut part is lifted to a designated position; the process is repeated until the web (2) and the rest of the bottom plate (3) of the top plate (1) are removed.
(E) Cutting and dismantling the pier anchoring section: dividing and determining the sequence according to the size of the pier anchoring section and the specification of the crane; then, the cut part is lifted to a designated position after cutting; for the hoisting of the beam section at the anchoring part, the beam section is fixed with a crane, and then the temporary anchoring is removed and the beam section is hoisted; and repeating the processes until the end of the process, and finishing the bridge dismantling construction.
2. The construction method for quick dismantling of box girder bridges without supports according to claim 1, wherein the cutting equipment used in the steps (B), (C), (D) and (E) is a wire saw.
3. The construction method for quickly dismantling the box girder bridge without the bracket according to claim 1, wherein a four-point hoisting manner is adopted in the steps (B), (C), (D) and (E).
4. The construction method for quick removal of a box girder bridge without a bracket according to claim 1, wherein the top plate (1) and the bottom plate (3) are cut simultaneously in the step (C) in an inclined cutting manner, and the length and width of the cut bottom plate are 10cm to 25cm smaller than the length and width of the cut top plate.
5. The construction method for rapidly dismantling the box girder bridge without the bracket according to claim 1, wherein the bottom plate is cut first in the step (C), and then the cutting is stopped, at this time, the crane needs to firstly hoist the cut bottom plate (3) to the height below the top plate (1), then continue the cutting, and hoist the top plate (1) and the bottom plate (3) together to the designated position after the top plate (1) is also cut.
6. The construction method for rapidly dismantling a box girder bridge without a bracket according to claim 1, wherein in the step (E), if the weight of the anchored beam section is within the hoisting range of the crane, the temporary anchoring can be directly removed for hoisting and dismantling.
7. The construction method for quick dismantling of box girder bridges without supports as claimed in claim 1, wherein in the step (E), if the weight of the anchored beam segments is out of the crane lifting range, the cutting and dismantling sequence should be firstly to cut and dismantle from both sides, and finally the rest anchored beam segments should be lifted and dismantled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010024140.8A CN111172902A (en) | 2020-01-09 | 2020-01-09 | Construction method for quickly dismantling box girder bridge without support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010024140.8A CN111172902A (en) | 2020-01-09 | 2020-01-09 | Construction method for quickly dismantling box girder bridge without support |
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| CN111172902A true CN111172902A (en) | 2020-05-19 |
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| CN202010024140.8A Pending CN111172902A (en) | 2020-01-09 | 2020-01-09 | Construction method for quickly dismantling box girder bridge without support |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009299418A (en) * | 2008-06-17 | 2009-12-24 | Kajima Corp | Retreating and removing method and retreating device for travelling work vehicle for cantilever construction |
| CN106192781A (en) * | 2016-07-21 | 2016-12-07 | 中电建路桥集团有限公司 | The method for dismounting of prestressing force list case three Room plate-girder |
| CN108708305A (en) * | 2018-05-28 | 2018-10-26 | 广西路桥工程集团有限公司 | A kind of construction method of low pier bridging toughening |
| CN109056557A (en) * | 2018-08-17 | 2018-12-21 | 中铁五局集团有限公司 | A kind of existing method for bridge construction of decomposition dismounting |
| CN109235290A (en) * | 2018-10-11 | 2019-01-18 | 中建钢构有限公司 | Bridge peace tears construction method open |
| JP2019090221A (en) * | 2017-11-14 | 2019-06-13 | 日本橋梁株式会社 | Composite girder removal method |
| CN110273385A (en) * | 2019-04-03 | 2019-09-24 | 中铁大桥局武汉桥梁特种技术有限公司 | A kind of across concrete box girder method for dismounting in cross-line hole |
| CN110409325A (en) * | 2019-08-15 | 2019-11-05 | 广东省水利水电第三工程局有限公司 | The method for dismounting of box beam |
-
2020
- 2020-01-09 CN CN202010024140.8A patent/CN111172902A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009299418A (en) * | 2008-06-17 | 2009-12-24 | Kajima Corp | Retreating and removing method and retreating device for travelling work vehicle for cantilever construction |
| CN106192781A (en) * | 2016-07-21 | 2016-12-07 | 中电建路桥集团有限公司 | The method for dismounting of prestressing force list case three Room plate-girder |
| JP2019090221A (en) * | 2017-11-14 | 2019-06-13 | 日本橋梁株式会社 | Composite girder removal method |
| CN108708305A (en) * | 2018-05-28 | 2018-10-26 | 广西路桥工程集团有限公司 | A kind of construction method of low pier bridging toughening |
| CN109056557A (en) * | 2018-08-17 | 2018-12-21 | 中铁五局集团有限公司 | A kind of existing method for bridge construction of decomposition dismounting |
| CN109235290A (en) * | 2018-10-11 | 2019-01-18 | 中建钢构有限公司 | Bridge peace tears construction method open |
| CN110273385A (en) * | 2019-04-03 | 2019-09-24 | 中铁大桥局武汉桥梁特种技术有限公司 | A kind of across concrete box girder method for dismounting in cross-line hole |
| CN110409325A (en) * | 2019-08-15 | 2019-11-05 | 广东省水利水电第三工程局有限公司 | The method for dismounting of box beam |
Non-Patent Citations (1)
| Title |
|---|
| 上海市城市建设设计研究总院（集团）有限公司等: "《桥梁拆除工程技术规程》", 31 May 2017, 同济大学出版社 * |
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Application publication date: 20200519 |