CN114508057A - Method for dismantling small concrete T-beam type bridge crossing obstacles - Google Patents
Method for dismantling small concrete T-beam type bridge crossing obstacles Download PDFInfo
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- CN114508057A CN114508057A CN202210218969.0A CN202210218969A CN114508057A CN 114508057 A CN114508057 A CN 114508057A CN 202210218969 A CN202210218969 A CN 202210218969A CN 114508057 A CN114508057 A CN 114508057A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001681 protective effect Effects 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- 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
Abstract
The invention relates to a method for dismantling a small concrete T-beam girder type bridge spanning obstacles, which comprises the following specific steps: surveying a site, and evaluating a small T-beam type bridge of concrete to be dismantled; marking and temporarily reinforcing the demolition construction part where the concrete small T-beam girder type bridge is damaged greatly and the stress performance is poor on a drawing; building a protective structure; dismantling an accessory structure of the concrete small T-beam type bridge; cutting an edge span; dismantling the protective structure; dismantling beam section structures of side spans on two sides on the ground on the two sides by using the crane; erecting a protection shed below a middle-span concrete small T-beam girder type bridge; building a temporary support; mid-span cutting; drilling a hanging hole; connecting a steel wire rope in a penetrating way; dismantling a midspan beam section; and removing other structures. The method of the invention removes the concrete small T-beam girder type bridge crossing obstacles under the condition of minimum influence on traffic, tightly links the working procedures of the construction process of the midspan, adopts integral lifting to the maximum extent, accelerates the construction speed and reduces the construction cost.
Description
Technical Field
The invention relates to the technical field of bridge reinforcement transformation and performance improvement construction, in particular to a method for dismantling a small concrete T-beam type bridge spanning obstacles.
Background
In the prior known technology, for the removal of crossing obstacles, especially for concrete bridges crossing railways, highways, rivers and the like, a dismantling mode of guiding or breaking traffic with great influence on the surrounding environment or traffic is often adopted, and for bridge structures crossing railways, rivers and the like with the requirement of navigation, railway and ship transportation need to be suspended during construction, so that great influence is brought to the civil life, and great economic loss is caused. At present, the operation period is reached, and a concrete small T-beam type bridge occupies a considerable part of bridges to be dismantled urgently, so that the dismantling method for the concrete small T-beam type bridge crossing obstacles is necessary.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a method for dismantling a small concrete T-beam type bridge spanning obstacles.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for dismantling a small concrete T-beam girder type bridge crossing obstacles comprises the following specific steps:
s1, field evaluation
Surveying a site, and evaluating a small T-beam type bridge of concrete to be dismantled;
s2, Label
Marking the positions where the concrete small T-beam girder type bridge is damaged greatly and the construction positions where the stress performance is poor and the construction positions are dismantled on a drawing;
s3, temporary reinforcement
Temporarily reinforcing the marked part of the concrete small T-beam girder bridge on the basis that structural collapse cannot be generated in the dismantling process;
s4, building a protective structure
The concrete small T-beam type bridge is sealed, and a protective structure is arranged on the concrete small T-beam type bridge;
s5, detaching and breaking accessory structure
Dismantling an accessory structure of the concrete small T-beam type bridge;
s6, edge span cutting
Cutting the side span of the beam section of the concrete small T-beam type bridge along the joint of the beam section of the concrete small T-beam type bridge, and cutting a single piece of concrete small T-beam into a single body;
s7, dismantling protection structure
Dismantling the protective structure;
s8, dismantling the side span beam section
Dismantling beam section structures of side spans on two sides on the ground on the two sides by using the crane;
s9, building protective shed
Erecting a protection shed below a middle-span concrete small T-beam girder type bridge;
s10, building a temporary support
A temporary support is erected on the side span for a crane to stand;
s11 midspan cutting
Cutting a middle span of a beam section of the concrete small T-beam type bridge along a beam section joint of the concrete small T-beam type bridge, and cutting a single piece of concrete small T-beam into a single body;
s12, drilling hanging holes
Drilling a hanging hole on a flange plate of a single-piece concrete small T-shaped beam in a midspan;
s13, connecting steel wire rope
The steel wire rope with the fastener penetrates through two transverse lifting holes of the single concrete small T-shaped beam and is fastened above the single concrete small T-shaped beam;
s14, removing midspan beam section
Hoisting the single-piece concrete small T-shaped beam integrally by a crane on the temporary support through a steel wire rope of the hoisting belt fastener, and transporting the single-piece concrete small T-shaped beam to other places;
s15, other Structure demolition
And (4) dismantling the protective shed, the temporary support and the piers at two sides to finish the dismantling of the whole obstacle-crossing concrete small T-beam type bridge.
In step S1, the items to be evaluated include the stress performance of the small T-beam bridge to be dismantled and the operating state of the bridge.
In step S5, the removed and broken attachment structure includes a road surface, a guardrail, and an expansion joint.
In step S8, when the side span beam section is removed, the removal mode does not affect the middle traffic lane.
In step S12, the hanging holes are through holes and symmetrically arranged along the transverse center line of the single concrete small T-beam.
In step S14, the single concrete small T-beams arranged side by side on the concrete small T-beam girder bridge are lifted in sequence from two sides to the middle.
The invention has the beneficial effects that: the method of the invention removes the concrete small T-beam girder type bridge crossing obstacles under the condition of minimum influence on traffic, tightly links the working procedures of the construction process of the midspan, adopts integral lifting to the maximum extent, accelerates the construction speed and reduces the construction cost.
Drawings
FIG. 1 is a schematic view of a bridge structure according to the present invention before demolition;
FIG. 2 is a schematic view of the protective structure arrangement of the present invention;
FIG. 3 is a schematic cross-sectional view of a concrete small T-beam girder bridge according to the present invention;
FIG. 4 is a schematic side span beam section removal of the present invention;
FIG. 5 is a schematic view of the construction of the shelter and temporary support of the present invention;
FIG. 6 is a schematic view of a mid-span beam section removal in the present invention;
FIG. 7 is a schematic view of the arrangement of through holes and the distribution of joints of beam sections according to the present invention;
FIG. 8 is a schematic representation of the present invention with the mid-span beam section removed;
FIG. 9 is a schematic view of the manner of hoisting the steel wire rope of the buckle according to the present invention;
in the figure: 1-a concrete small T-beam bridge; 11-road surface; 12-a guardrail; 13-beam section joints; 14-single concrete small T-beam; 15-hanging holes; 16-a steel wire rope; 2-a protective structure; 3-hoisting the machine; 4-a protective shed; 5-a temporary scaffold; 6-bridge pier;
the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 to 9, a method for dismantling a small concrete T-beam girder bridge spanning an obstacle includes the following steps:
s1, field evaluation
In the exploration site, evaluating the small T-beam girder bridge 1 to be demolished;
s2, Label
Marking the position where the concrete small T-beam girder type bridge 1 is damaged greatly and the demolition construction position which is affected by poor stress performance on a drawing;
s3, temporary reinforcement
Temporarily reinforcing the marked part of the concrete small T-beam girder type bridge 1 on the basis that structural collapse cannot be generated in the dismantling process;
s4, building a protective structure 2
The concrete small T-beam type bridge 1 is closed, and a protective structure 2 is arranged on the concrete small T-beam type bridge 1;
s5, detaching and breaking accessory structure
Dismantling an accessory structure of the concrete small T-beam type bridge 1;
s6, edge span cutting
Cutting the side span of the beam section of the concrete small T-beam type bridge 1 along the beam section joint 13 of the concrete small T-beam type bridge 1, and cutting a single piece of concrete small T-beam 14 into a single body;
s7, dismantling the protective structure 2
Dismantling the protective structure 2;
s8, dismantling the side span beam section
The crane 3 removes beam section structures of side spans at two sides on the ground at two sides;
s9, building protective shed 4
Erecting a protective shed 4 below a mid-span concrete small T-beam girder bridge 1;
s10, building a temporary support 5
A temporary support 5 is erected on the side span for the crane 3 to stand;
s11 midspan cutting
Cutting a middle span of a beam section of the concrete small T-beam type bridge 1 along a beam section joint 13 of the concrete small T-beam type bridge 1, and cutting a single piece of concrete small T-beam 14 into a single body;
s12, drilling hanging hole 15
Drilling hanging holes 15 on the flange plates of the single-piece concrete small T-shaped beam 14 at the midspan;
s13, connecting steel cable 16
A steel wire rope 16 with a fastener penetrates through two transverse lifting holes 15 of the single concrete small T-shaped beam 14 and is fastened above the single concrete small T-shaped beam 14;
s14, removing midspan beam section
The crane 3 on the temporary bracket 5 integrally lifts the single-piece concrete small T-shaped beam 14 through a steel wire rope 16 for lifting the sling fastener and transports the single-piece concrete small T-shaped beam to other places;
s15, other Structure demolition
And (4) dismantling the protective shed 4, the temporary support 5 and the piers 6 at two sides to complete the dismantling of the whole obstacle-crossing concrete small T-beam girder type bridge.
In step S1, the items to be evaluated include the stress performance of the small T-beam bridge 1 to be dismantled, and the bridge operating state.
In step S5, the removed and broken attachment structure includes a road surface 11, a guardrail 12, and an expansion joint.
In step S8, when the side span beam section is removed, the removal mode does not affect the middle traffic lane.
In step S12, the hanging holes 15 are through holes and are symmetrically arranged along the transverse center line of the single concrete small T-beam 14.
In step S14, the single concrete small T-beams 14 arranged side by side on the concrete small T-beam type bridge 1 are lifted in sequence from two sides to the middle.
The method of the invention removes the concrete small T-beam girder type bridge crossing obstacles under the condition of minimum influence on traffic, tightly links the working procedures of the construction process of the midspan, adopts integral lifting to the maximum extent, accelerates the construction speed and reduces the construction cost.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, adaptations or uses of the invention, and all such modifications and variations are within the scope of the invention.
Claims (6)
1. A method for dismantling a small T-shaped concrete girder type bridge crossing obstacles is characterized by comprising the following specific steps:
s1, field evaluation
The method comprises the following steps of (1) surveying a site, and evaluating a small T-beam type bridge (1) of concrete to be dismantled;
s2, Label
Marking the positions where the concrete small T-beam girder type bridge (1) is damaged greatly and the construction positions where the stress performance is poor and the construction positions are dismantled under the influence of the poor stress performance on a drawing;
s3, temporary reinforcement
Temporarily reinforcing the marked part of the concrete small T-beam girder type bridge (1) on the basis that structural collapse cannot be generated in the dismantling process;
s4, building protective structure (2)
The concrete small T-beam type bridge (1) is closed, and a protective structure (2) is arranged on the concrete small T-beam type bridge (1);
s5, detaching and breaking accessory structure
Dismantling an accessory structure of the concrete small T-beam type bridge (1);
s6, edge span cutting
Cutting the side span of the beam section of the concrete small T-beam type bridge (1) along the beam section joint (13) of the concrete small T-beam type bridge (1), and cutting a single piece of concrete small T-beam (14) into a single body;
s7, dismantling the protection structure (2)
Dismantling the protective structure (2);
s8, dismantling the side span beam section
The crane (3) removes the beam section structures of the side spans on the two sides on the ground on the two sides;
s9, building protective shed (4)
Erecting a protective shed (4) below a middle-span concrete small T-beam type bridge (1);
s10, building temporary support (5)
A temporary support (5) is erected on the side span for the crane (3) to stand;
s11 midspan cut
Cutting a mid-span of a beam section of the concrete small T-beam type bridge (1) along a beam section joint (13) of the concrete small T-beam type bridge (1), and cutting a single piece of concrete small T-beam (14) into a single body;
s12, arranging hanging hole (15)
Drilling hanging holes (15) on a flange plate of a single-piece concrete small T-shaped beam (14) at a midspan;
s13, cross-under wire rope (16)
A steel wire rope (16) with a fastener penetrates through two transverse lifting holes (15) of the single concrete small T-shaped beam (14) and is fastened above the single concrete small T-shaped beam (14);
s14, removing midspan beam section
A crane (3) on the temporary support (5) integrally lifts the single-piece concrete small T-shaped beam (14) through a steel wire rope (16) of a lifting belt fastener and transports the whole to other places;
s15, other Structure demolition
And (3) dismantling the protective shed (4), the temporary support (5) and the piers (6) at two sides to finish the dismantling of the whole obstacle-spanning concrete small T-beam type bridge.
2. The method for dismantling a small T-beam concrete bridge spanning obstacles according to claim 1, wherein the items evaluated in step S1 include the stress performance of the small T-beam concrete bridge 1 to be dismantled and the operating state of the bridge.
3. The method for dismantling a small T-beam concrete bridge spanning obstacles according to claim 2, wherein the removed and broken attachment structures include a road surface (11), a guardrail (12) and an expansion joint in step S5.
4. The method for dismantling a small T-beam concrete bridge spanning an obstacle according to claim 3, wherein in step S8, when dismantling the side-span beam section, the dismantling mode does not affect the middle traffic lane.
5. The method for dismantling a small T-beam concrete bridge spanning obstacles according to claim 4, wherein the hanging holes (15) are through holes symmetrically arranged along the transverse center line of the single T-beam concrete (14) in step S12.
6. The method for dismantling a small T-beam concrete bridge spanning obstacles according to claim 5, wherein in step S14, the single T-beams (14) arranged side by side on the small T-beam concrete bridge (1) are hoisted in sequence from two sides to the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210218969.0A CN114508057A (en) | 2022-03-08 | 2022-03-08 | Method for dismantling small concrete T-beam type bridge crossing obstacles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210218969.0A CN114508057A (en) | 2022-03-08 | 2022-03-08 | Method for dismantling small concrete T-beam type bridge crossing obstacles |
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| CN114508057A true CN114508057A (en) | 2022-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210218969.0A Pending CN114508057A (en) | 2022-03-08 | 2022-03-08 | Method for dismantling small concrete T-beam type bridge crossing obstacles |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100950027B1 (en) * | 2009-12-04 | 2010-03-29 | 영창중공업 주식회사 | Composite girder for bridge |
| CN106436594A (en) * | 2016-08-16 | 2017-02-22 | 武汉二航路桥特种工程有限责任公司 | Walking pushing translation dismantling method of beam bridge in uniform-cross section way |
| CN111501584A (en) * | 2020-03-31 | 2020-08-07 | 上海城建市政工程（集团）有限公司 | Bridge dismantling construction method for prestressed concrete continuous beam |
| CN112342937A (en) * | 2019-08-09 | 2021-02-09 | 南京林业大学 | Method for quickly dismantling upper structure of T-shaped beam bridge |
| CN113089510A (en) * | 2021-04-14 | 2021-07-09 | 四川省交通建设集团股份有限公司 | Method for dismantling reinforced concrete continuous box girder overpass bridge |
| CN113863170A (en) * | 2021-09-02 | 2021-12-31 | 武汉二航路桥特种工程有限责任公司 | Overall carrying and dismantling method for overline suspender arch bridge |
| CN114045758A (en) * | 2021-11-16 | 2022-02-15 | 广西路桥工程集团有限公司 | Construction method for dismantling old bridge of precast beam |
-
2022
- 2022-03-08 CN CN202210218969.0A patent/CN114508057A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100950027B1 (en) * | 2009-12-04 | 2010-03-29 | 영창중공업 주식회사 | Composite girder for bridge |
| CN106436594A (en) * | 2016-08-16 | 2017-02-22 | 武汉二航路桥特种工程有限责任公司 | Walking pushing translation dismantling method of beam bridge in uniform-cross section way |
| CN112342937A (en) * | 2019-08-09 | 2021-02-09 | 南京林业大学 | Method for quickly dismantling upper structure of T-shaped beam bridge |
| CN111501584A (en) * | 2020-03-31 | 2020-08-07 | 上海城建市政工程（集团）有限公司 | Bridge dismantling construction method for prestressed concrete continuous beam |
| CN113089510A (en) * | 2021-04-14 | 2021-07-09 | 四川省交通建设集团股份有限公司 | Method for dismantling reinforced concrete continuous box girder overpass bridge |
| CN113863170A (en) * | 2021-09-02 | 2021-12-31 | 武汉二航路桥特种工程有限责任公司 | Overall carrying and dismantling method for overline suspender arch bridge |
| CN114045758A (en) * | 2021-11-16 | 2022-02-15 | 广西路桥工程集团有限公司 | Construction method for dismantling old bridge of precast beam |
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