CN111058381A - Construction method for side-span cast-in-place section of continuous rigid frame bridge - Google Patents
Construction method for side-span cast-in-place section of continuous rigid frame bridge Download PDFInfo
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- CN111058381A CN111058381A CN201911165725.5A CN201911165725A CN111058381A CN 111058381 A CN111058381 A CN 111058381A CN 201911165725 A CN201911165725 A CN 201911165725A CN 111058381 A CN111058381 A CN 111058381A
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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
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a construction method of a side span cast-in-place section of a continuous rigid frame bridge, which comprises the following steps: pouring pier columns, embedding steel longitudinal beams and embedded steel plates → prefabricated beams → connecting steel inclined beams → connecting scissors supports → laying I-shaped steel → erecting supports and templates → constructing side span cast-in-place sections. According to the invention, after the construction of the upright post is finished, the approach bridge precast beam is erected in advance, and the counterweight is carried out for the construction of the side span cast-in-place straight line section. When the continuous rigid frame is constructed to span the cast-in-place section, the counter weight of the counter weight is not needed to be pressed by the bracket. Only need carry out the pre-compaction to unilateral bracket during the construction, whether the inspection bracket is qualified, can carry out the cast-in-place section construction of side span after the pre-compaction is accomplished.
Description
Technical Field
The invention relates to a construction method of a side span cast-in-place section of a continuous rigid frame bridge, and belongs to the technical field of bridge construction.
Background
In the prior art, when a continuous rigid frame bridge side span cast-in-place section is constructed in highway engineering, brackets are respectively arranged on two sides of a pier column, one side of the pier column is constructed to form the side span cast-in-place section, and the other side of the pier column is equivalently balanced. The bracket installation, the construction counterweight and the material transfer have certain difficulties, and the approach bridge precast beam can be erected after the main bridge is folded.
Disclosure of Invention
The invention aims to provide a construction method for an edge-span cast-in-place section of a continuous rigid frame bridge, which aims to solve the problems of construction of a balance weight and difficulty in material transfer in an edge-span cast-in-place straight line section and the like, and further overcomes the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a construction method of a side span cast-in-place section of a continuous rigid frame bridge, which comprises the following steps:
a) pouring the pier stud; when the pier stud is poured, a group of embedded steel plates and a group of steel longitudinal beams are embedded in one side of the pier stud section to be subjected to side span cast-in-place;
b) erecting a group of prefabricated beams at the top end of one side of the pier stud without the embedded steel plate and the steel longitudinal beam;
c) connecting a group of precast beams together;
d) connecting the end part of the steel longitudinal beam with the embedded steel plate through the steel oblique beam;
e) the adjacent steel longitudinal beams and the steel inclined beams are connected into a whole through the cross braces;
f) laying a group of I-shaped steel on the top surface of the steel longitudinal beam;
g) a bracket and a template are supported on the group of I-shaped steel surfaces;
h) and constructing a side span cast-in-place section on the template.
In the construction method of the side span cast-in-place section of the continuous rigid frame bridge, when the group of I-beams is laid in the step f, the distance between the I-beams corresponds to the distance between the supports.
In the construction method of the side span cast-in-place section of the continuous rigid frame bridge, the top surface and the bottom surface of the side span cast-in-place section are both provided with tensioning grooves.
In the construction method of the side span cast-in-place section of the continuous rigid frame bridge, after the step e is finished, a bracket consisting of a steel longitudinal beam, a steel oblique beam and a shear brace is subjected to pre-pressing inspection so as to check the safety of the bracket, eliminate the inelastic deformation of the bracket and determine the elastic deformation; and f, after the inspection is qualified, the construction after the step f can be carried out.
Due to the adoption of the technical scheme, compared with the prior art, due to the adoption of the technical scheme, the L-shaped cover beam on the pier column does not need secondary pouring, and the precast beam can be erected in advance and used as an edge-span cast-in-place straight-line segment for construction to carry out balance weight. When the continuous rigid frame is constructed to span the cast-in-place section, the counter weight of the counter weight is not needed to be pressed by the bracket. Only need carry out the pre-compaction to unilateral bracket during the construction, whether the inspection bracket is qualified, can carry out the cast-in-place section construction of side span after the pre-compaction is accomplished. When the bracket is erected, the access of constructors and the transportation of materials can be directly carried out on the approach bridge, and the method is more economical, safer and better in integrity compared with the conventional method.
Drawings
FIG. 1 is a schematic illustration of the construction process of the present invention;
fig. 2 is a schematic structural diagram of the present invention.
The labels in the figures are: 1-pier stud, 2-embedded steel plate, 3-steel longitudinal beam, 4-side span cast-in-place section, 5-precast beam, 6-steel oblique beam, 7-shear support, 8-I-steel, 9-bracket, 10-template and 11-tension groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention discloses a construction method of a side span cast-in-place section of a continuous rigid frame bridge, which comprises the following steps of:
a. pouring the pier stud 1; when the pier stud 1 is poured, a group of embedded steel plates 2 and a group of steel longitudinal beams 3 are embedded in one side of the pier stud 1, which is ready for the side span cast-in-place section 4;
b. erecting a group of precast beams 5 at the top end of one side of the pier stud 1 without the embedded steel plate 2 and the steel longitudinal beam 3;
c. connecting a set of precast beams 5 together;
d. connecting the end part of the steel longitudinal beam 3 with the embedded steel plate 2 through the steel oblique beam 6;
e. the adjacent steel longitudinal beams 3 and the steel oblique beams 6 are connected into a whole through the cross braces 7; pre-pressing inspection is carried out on the bracket consisting of the steel longitudinal beam 3, the steel oblique beam 6 and the cross brace 7 so as to check the safety of the bracket, eliminate the inelastic deformation of the bracket and determine the elastic deformation; after the inspection is qualified, the construction of the following steps can be carried out;
f. laying a group of I-shaped steel 8 on the top surface of the steel longitudinal beam 3; the distance between the I-shaped steel 8 corresponds to the distance between the brackets 9;
g. a bracket 9 and a template 10 are supported on the surfaces of a group of I-shaped steel 8;
h. the side span cast-in-place section 4 is constructed on the formwork 10, and the top surface and the bottom surface of the side span cast-in-place section 4 are both provided with tension grooves 11.
In specific implementation, reference is made to the structure of fig. 2. The steel-reinforced concrete side span cast-in-place pier comprises a pier stud 1, an embedded steel plate 2, a steel longitudinal beam 3, a precast beam 5, a steel inclined strut 6, an I-shaped steel 8 and a side span cast-in-place section 4. The embedded steel plate 2 and the steel longitudinal beam 3 are embedded on one side when the pier stud 1 is constructed, so that the embedded steel plate 2 and the steel longitudinal beam 3 are connected with the pier stud 1 into a whole. After the pier stud 1 is constructed, the precast beam 5 is erected, and the precast beam 5 is erected in advance to apply a weight to the side span cast-in-place section 4. Immediately after erection of the precast girders 5, all the precast girders 5 are connected together to be integrated, to increase stability of the precast girders 5. And then the steel diagonal braces 6 connecting the steel longitudinal beams 3 and the embedded steel plates 2 form a bracket. In order to ensure the stability of the bracket at the single side of the side span cast-in-place section 4, after the steel inclined struts 6 are connected, the scissor supports 7 are arranged between the steel inclined struts 6, so that a plurality of brackets are connected into a whole to enhance the stability of the bracket. A plurality of I-beams 8 are laid on the top surfaces of the steel longitudinal beams 3, when the I-beams 8 are laid, the space of the designed supports must be estimated for laying, after the I-beams 8 are laid, the supports 9 and the templates 10 are erected, and the side span cast-in-place section 4 is constructed.
The structures of the invention are connected into a system with stable balance, and after the pier stud construction is finished, a precast beam of an approach bridge is erected in advance to carry out counterweight for the construction of the side span cast-in-place straight line section. When the continuous rigid frame is constructed to span the cast-in-place section, the counter weight of the counter weight is not needed to be pressed by the bracket. Only need carry out the pre-compaction to unilateral bracket during the construction, whether the inspection bracket is qualified, can carry out the cast-in-place section construction of side span after the pre-compaction is accomplished.
Claims (4)
1. A construction method for a side span cast-in-place section of a continuous rigid frame bridge is characterized by comprising the following steps: the method comprises the following steps:
a) pouring the pier stud (1); when the pier stud (1) is poured, a group of embedded steel plates (2) and a group of steel longitudinal beams (3) are embedded in one side of the pier stud (1) to be subjected to side span cast-in-place section (4);
b) erecting a group of precast beams (5) at the top end of one side of the pier column (1) without the embedded steel plate (2) and the steel longitudinal beam (3);
c) connecting a group of precast beams (5) together;
d) connecting the end part of the steel longitudinal beam (3) with the embedded steel plate (2) through the steel oblique beam (6);
e) the adjacent steel longitudinal beams (3) and the steel oblique beams (6) are connected into a whole through the cross braces (7);
f) laying a group of I-shaped steel (8) on the top surface of the steel longitudinal beam (3);
g) a bracket (9) and a template (10) are supported on the surfaces of a group of I-shaped steel (8);
h) and constructing a side span cast-in-place section (4) on the template (10).
2. The construction method of the side-span cast-in-place section of the continuous rigid frame bridge according to claim 1, characterized by comprising the following steps: and f, when a group of I-shaped steel (8) is laid, the distance between the I-shaped steel (8) corresponds to the distance between the brackets (9).
3. The construction method of the side-span cast-in-place section of the continuous rigid frame bridge according to claim 1, characterized by comprising the following steps: and tension grooves (11) are formed in the top surface and the bottom surface of the side span cast-in-place section (4).
4. The construction method of the side-span cast-in-place section of the continuous rigid frame bridge according to claim 1, characterized by comprising the following steps: after the step e is finished, carrying out pre-pressing inspection on the bracket consisting of the steel longitudinal beam (3), the steel oblique beam (6) and the cross brace (7) so as to check the safety of the bracket, eliminate the non-elastic deformation of the bracket and determine the elastic deformation; and f, after the inspection is qualified, the construction after the step f can be carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911165725.5A CN111058381A (en) | 2019-11-25 | 2019-11-25 | Construction method for side-span cast-in-place section of continuous rigid frame bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911165725.5A CN111058381A (en) | 2019-11-25 | 2019-11-25 | Construction method for side-span cast-in-place section of continuous rigid frame bridge |
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| CN111058381A true CN111058381A (en) | 2020-04-24 |
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| CN201911165725.5A Pending CN111058381A (en) | 2019-11-25 | 2019-11-25 | Construction method for side-span cast-in-place section of continuous rigid frame bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115491990A (en) * | 2022-09-26 | 2022-12-20 | 中国十九冶集团有限公司 | Construction method for side-span cast-in-place section concrete pouring of continuous rigid frame bridge |
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2019
- 2019-11-25 CN CN201911165725.5A patent/CN111058381A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115491990A (en) * | 2022-09-26 | 2022-12-20 | 中国十九冶集团有限公司 | Construction method for side-span cast-in-place section concrete pouring of continuous rigid frame bridge |
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