CN111749113A - Mortise and tenon connection steel-concrete combined assembly type arch bridge and construction method thereof - Google Patents
Mortise and tenon connection steel-concrete combined assembly type arch bridge and construction method thereof Download PDFInfo
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- CN111749113A CN111749113A CN202010505217.3A CN202010505217A CN111749113A CN 111749113 A CN111749113 A CN 111749113A CN 202010505217 A CN202010505217 A CN 202010505217A CN 111749113 A CN111749113 A CN 111749113A
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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
- E01D4/00—Arch-type 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
- E01D19/00—Structural or constructional details of 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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a mortise and tenon joint steel-concrete combined assembled arch bridge and a construction method thereof, and belongs to the technical field of arch bridges. The prefabricated reinforced concrete arch bridge comprises a plurality of prefabricated reinforced concrete segments and arch seats, wherein the arch seats are arranged on the fixed ground at the two ends of the arch bridge, the prefabricated reinforced concrete segments are temporarily solidified with the arch seats, and the prefabricated reinforced concrete segments are sequentially in mortise and tenon connection to connect the arch seats together to form the arch bridge. The method adopts the measures of temporary consolidation of the arch base, splicing and tenon jointing of the segments of the arch ring, welding profile steel at the wet joint, finish rolling of deformed steel bars by opposite pulling between the segments, gradual concrete pouring and the like. Through the measures, the construction speed is greatly increased, and the construction quality is guaranteed.
Description
Technical Field
The invention relates to a mortise and tenon connection steel-concrete combined assembled arch bridge and a construction method thereof, belonging to the technical field of arch bridges.
Background
The reinforced concrete arch bridge has the advantages of superior structural performance, large spanning capability, strong terrain adaptability and the like, and is widely applied to domestic mountain valley-crossing bridges. At present, the large-span reinforced concrete arch bridge mainly adopts prefabricated sections for hoisting construction, namely after the prefabricated sections are hoisted in place through a cable crane, a stay buckle cable is temporarily buckled and hung, and the prefabricated arch box sections and the installed sections are connected until the arch bridge is closed to form the arch bridge.
When the arch bridge segment is hoisted and constructed, the following problems exist: 1. in the construction of a bridge spanning valley in a mountain area, the prefabricated sections are temporarily buckled and hung through the inclined pull buckle cables, and the prefabricated sections are easy to shake after being positioned and difficult to ensure the assembling precision due to the influence of wind force; 2. shear keys are usually arranged in the connection between the prefabricated sections, and the self weight of the reinforced concrete sections is large, so that the arch bridge is provided with radians, and the joints are difficult to temporarily anchor; 3. when the arch bridge segments are assembled, the root parts of the arch rings are easy to crack under the influence of the increased disturbance of the long cantilever.
Disclosure of Invention
The invention provides a mortise and tenon joint steel-concrete combined assembled arch bridge and a construction method thereof.
The arch bridge comprises prefabricated reinforced concrete sections and arch bases, wherein the arch bases are arranged on the fixed ground at two ends of the arch bridge, the prefabricated reinforced concrete sections are hinged with the arch bases, and the prefabricated reinforced concrete sections are sequentially in mortise and tenon connection to connect the arch bases together to form the arch bridge.
Furthermore, the prefabricated reinforced concrete segment comprises a top plate, a bottom plate and three webs, wherein two webs are connected with the top plate and the bottom plate to form an external structure of the prefabricated reinforced concrete segment, and the rest web is installed in the prefabricated reinforced concrete segment and vertically connected with the top plate and the bottom plate through the central axis of the prefabricated reinforced concrete segment.
Furthermore, the same side end face of the three webs is a mortise and tenon reference surface formed by a plurality of grooves and convex ribs.
Furthermore, the outer surfaces of the top plate, the bottom plate and the two webs on the two sides are provided with embedded parts, anchor seats are welded on the embedded parts, and finish-rolled deformed steel bars are screwed between horizontal holes of the corresponding anchor seats of the two adjacent prefabricated reinforced concrete segments and are tightened and fixed through nuts.
Furthermore, a pressed embedded part is installed on the prefabricated reinforced concrete segment adjacent to the arch springing, the pressed embedded part is an embedded steel plate with the thickness of 60cm multiplied by 5cm, a steel pad seat is welded on the embedded part, and a steel plate super pad with the thickness of 5-10 cm is installed above the steel pad seat.
Furthermore, the prefabricated reinforced concrete segment which is not adjacent to the arch springing is provided with two splicing sections, wherein one splicing section is provided with section steel at the intersection of the three webs and the top plate and the bottom plate, and the other splicing section is a mortise and tenon reference surface.
A building method of a mortise and tenon joint steel-concrete combined assembled arch bridge is based on the mortise and tenon joint steel-concrete combined assembled arch bridge, and comprises the following steps:
firstly, after prefabricating the prefabricated reinforced concrete segment, installing an embedded part;
step two, during arch abutment construction, respectively installing a pressed embedded part on the arch abutment corresponding to a web plate of the prefabricated reinforced concrete segment adjacent to the arch springing, welding a steel cushion seat on the pressed embedded part, and installing a steel plate super cushion of 5-10 cm above the steel cushion seat;
step three, in the installation of the prefabricated reinforced concrete segments adjacent to the arch springing, hoisting an arch ring in place by adopting a cable crane, superposing the center of a hinge shaft of an upper support of a hinge seat and a lower support of the hinge seat, synchronously inserting 40Cr alloy steel, adjusting the angle of the arch ring on a steel cushion seat on the steel cushion seat after the installation of the arch ring is finished, forming temporary consolidation, and tensioning a buckle cable to a designed cable force;
hoisting the next prefabricated reinforced concrete segment, rapidly and accurately matching the prefabricated reinforced concrete segment and the prefabricated reinforced concrete segment through groove convex ribs of a joint splicing section, namely mortise and tenon connection, coating epoxy resin adhesive on a mortise and tenon contact surface, installing finish-rolled deformed steel bars at the top plate, the bottom plate and two sides of the prefabricated reinforced concrete segment, tensioning to a design load, solidifying the rubber material of a mortise and tenon reference surface, tensioning a buckling cable to a design cable force, and pouring concrete between the prefabricated reinforced concrete segments;
step five, when the wet joint position is constructed, welding profile steel, installing finish rolling deformed steel bars, tensioning to a designed load for anchoring, tensioning the buckling cables to a designed cable force, and pouring concrete at the wet joint position;
and step six, the step four to the step five are circulated until the main arch rings are closed.
The main advantages of the invention are:
1. according to the mortise and tenon joint steel-concrete combined assembled arch bridge, all the segments are prefabricated and processed in a factory, and are spliced on site, so that the construction time is saved.
2. The joint connection adopts glue splicing mortise and tenon, the section steel is welded at the wet joint, and the method of finish rolling deformed steel bar by opposite drawing can realize quick and accurate matching between the joints and ensure the splicing precision; and the problem of because of assembled concrete segment dead weight is great, including the main arch ring is equipped with the radian, lead to interim anchor inefficacy is solved.
3. The prefabricated segments are temporarily solidified by adopting arch seats, then spliced and mortised by glue, and finally concrete is poured. The arch ring line shape can be adjusted, the connection between the nodes is firm, and the problem that the root of the arch ring is easy to crack due to the influence of the disturbance sensitivity of the cantilever is solved.
Drawings
FIG. 1 is a schematic view of the overall structure of a mortise and tenon joint steel-concrete combined assembled arch bridge of the invention;
FIG. 2 is a schematic structural view of a prefabricated reinforced concrete segment;
FIG. 3 is a schematic structural view of a prefabricated reinforced concrete segment adjacent to an arch support hinged to the arch support;
fig. 4 is a schematic plan view of a prefabricated reinforced concrete segment adjacent to an abutment and an abutment steel pad.
The prefabricated reinforced concrete section comprises a prefabricated reinforced concrete section 1, an embedded part 2, section steel 3, finish-rolled deformed steel bars 4, a hinged support upper support 5, a hinged support lower support 6, a hinged shaft center 7, a pressed embedded part 8, a steel cushion seat 9 and a steel plate super cushion 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the mortise and tenon jointed steel-concrete combined assembled arch bridge comprises prefabricated reinforced concrete segments 1 and arch bases, wherein the arch bases are arranged on the fixed ground at two ends of the arch bridge, the prefabricated reinforced concrete segments 1 are hinged with the arch bases, and the prefabricated reinforced concrete segments 1 are sequentially mortise and tenon jointed to connect the arch bases together to form the arch bridge.
The prefabricated reinforced concrete segment 1 comprises a top plate, a bottom plate and three webs, wherein two webs are connected with the top plate and the bottom plate to form an external structure of the prefabricated reinforced concrete segment 1, and the rest web is installed in the prefabricated reinforced concrete segment 1 and vertically connected with the top plate and the bottom plate through the central axis of the prefabricated reinforced concrete segment 1.
The same side end face of the three webs is a mortise and tenon reference surface formed by a plurality of groove convex ribs.
The outer surfaces of the top plate, the bottom plate and the two webs on the two sides are provided with embedded parts 2, anchor seats are welded on the embedded parts 2, and finish-rolled deformed steel bars 4 are screwed between horizontal holes of the corresponding anchor seats of the two adjacent prefabricated reinforced concrete segments 1 and are tightened and fixed through nuts.
A pressed embedded part 8 is installed on the prefabricated reinforced concrete segment 1 adjacent to the arch springing, the pressed embedded part 8 is an embedded steel plate with the thickness of 60cm multiplied by 5cm, a steel cushion seat 9 is welded on the pressed embedded part 8, and a steel plate super cushion 10 with the thickness of 5-10 cm is installed above the steel cushion seat.
The prefabricated reinforced concrete segment 1 which is not adjacent to the arch springing is provided with two splicing sections, wherein one splicing section is provided with the section steel 3 at the intersection of three webs, the top plate and the bottom plate, and the other splicing section is a mortise and tenon reference surface.
A method for building a mortise and tenon joint steel-concrete combined assembled arch bridge is based on the mortise and tenon joint steel-concrete combined assembled arch bridge, and comprises the following steps:
firstly, after prefabricating a prefabricated reinforced concrete segment 1, installing an embedded part 2;
step two, during arch abutment construction, respectively installing a pressed embedded part 8 on the arch abutment at a position corresponding to a web plate of the prefabricated reinforced concrete segment 1 adjacent to an arch springing, welding a steel cushion seat 9 on the pressed embedded part 8, and installing a steel plate super cushion 10 of 5-10 cm above the steel cushion seat;
step three, in the installation of the prefabricated reinforced concrete segment 1 adjacent to the arch springing, hoisting an arch ring in place by adopting a cable crane, superposing a hinge shaft center 7 of a hinge seat upper support 5 and a hinge seat lower support 6, synchronously inserting 40Cr alloy steel, adjusting the angle of the arch ring on a support steel plate on a steel cushion seat after the completion of the installation of the arch ring, forming temporary consolidation, and tensioning and buckling the cable to a designed cable force;
hoisting the next prefabricated reinforced concrete segment 1, rapidly and accurately matching the prefabricated reinforced concrete segment 1 and the prefabricated reinforced concrete segment through groove convex ribs of a joint splicing section, namely mortise-tenon connection, coating epoxy resin adhesive on a mortise-tenon contact surface, installing the top plate, the bottom plate and the finish-rolled deformed steel bars 4 at two sides of the prefabricated reinforced concrete segment 1, tensioning to a design load, solidifying the sizing material of a mortise-tenon reference surface, tensioning the buckling cables to a design cable force, and pouring concrete between the prefabricated reinforced concrete segments 1;
step five, when the wet joint position is constructed, welding the section steel 3, installing the finish rolling deformed steel 4, tensioning to a designed load for anchoring, tensioning the buckle cable to a designed cable force, and pouring concrete at the wet joint position;
and step six, the step four to the step five are circulated until the main arch rings are closed.
The mortise and tenon joint steel-concrete combined assembled arch bridge and the construction method thereof provided by the invention adopt measures of temporary consolidation of an arch base, splicing mortise and tenon of arch ring segments, welding profile steel at wet joints, oppositely pulling and finish rolling deformed steel between the segments, gradually pouring concrete and the like. Through the measures, the construction speed is greatly increased, and the construction quality is guaranteed.
Claims (7)
1. The mortise and tenon joint steel-concrete combined assembled arch bridge is characterized by comprising prefabricated reinforced concrete segments (1) and arch bases, wherein the arch bases are arranged on the fixed ground at two ends of the arch bridge, a plurality of prefabricated reinforced concrete segments (1) are temporarily solidified with the arch bases, and the prefabricated reinforced concrete segments (1) are sequentially in mortise and tenon joint to connect the arch bases together to form the arch bridge.
2. A mortise and tenon jointed steel-concrete combined assembled arch bridge according to claim 1, wherein the prefabricated reinforced concrete segment (1) comprises a top plate, a bottom plate and three webs, wherein two webs are connected with the top plate and the bottom plate to constitute an external structure of the prefabricated reinforced concrete segment (1), and the remaining web is installed in the prefabricated reinforced concrete segment (1) and is vertically connected with the top plate and the bottom plate through a central axis of the prefabricated reinforced concrete segment (1).
3. The mortise and tenon jointed steel-concrete combined assembled arch bridge of claim 2, wherein the same side end face of the three webs is a mortise and tenon datum plane formed by a plurality of groove ribs.
4. The mortise and tenon jointed steel-concrete combined assembled arch bridge of claim 2, wherein embedded parts (2) are arranged on the outer surfaces of the top plate, the bottom plate and the two webs on the two sides, anchor seats are welded on the embedded parts (2), and finish-rolled deformed steel bars (4) are screwed between horizontal holes of the corresponding anchor seats of the two adjacent prefabricated reinforced concrete segments (1) and are tightened and fixed through nuts.
5. The mortise and tenon jointed steel-concrete combined assembled arch bridge of claim 1, wherein a pressed embedded part (8) is installed on the prefabricated reinforced concrete segment (1) adjacent to the arch springing, the pressed embedded part (8) is an embedded steel plate with the thickness of 60cm x 5cm, a steel pad seat (9) is welded on the pressed embedded part (8), and a steel plate super pad (10) with the thickness of 5-10 cm is installed above the steel pad seat.
6. A mortise and tenon jointed steel-concrete combined assembled arch bridge according to claim 4, wherein the prefabricated reinforced concrete segments (1) which are not adjacent to the arch springing are provided with two splicing sections, wherein one splicing section is provided with section steel (3) at the intersection of the three webs and the top plate and the bottom plate, and the other splicing section is a mortise and tenon datum plane.
7. A construction method of a mortise and tenon joint steel-concrete combined assembled arch bridge, which is based on any one of claims 1 to 6, and is characterized by comprising the following steps of:
firstly, after prefabricating a prefabricated reinforced concrete segment (1), installing an embedded part (2);
step two, during arch abutment construction, respectively installing a pressed embedded part (8) at a position on the arch abutment corresponding to a web plate of the prefabricated reinforced concrete segment (1) adjacent to the arch springing, welding a steel cushion seat (9) on the pressed embedded part (8), and installing a steel plate super cushion (10) of 5-10 cm above the steel cushion seat;
and thirdly, hoisting the arch ring in place by adopting a cable crane in the installation of the prefabricated reinforced concrete segment (1) adjacent to the arch springing, superposing the hinge shaft center (7) of the upper hinge support (5) and the lower hinge support (6) and synchronously inserting 40Cr alloy steel. After finishing, adjusting the angle of an arch ring on a steel cushion seat (9) on the steel cushion seat, finishing the installation of the arch ring, forming temporary consolidation, and tensioning the buckle cable to the designed cable force;
hoisting the next prefabricated reinforced concrete segment (1), rapidly and accurately matching the prefabricated reinforced concrete segment (1) through groove convex ribs of a joint splicing section, namely mortise-tenon connection, coating epoxy resin glue on a mortise-tenon contact surface, installing a top plate and a bottom plate of the prefabricated reinforced concrete segment (1) and finish-rolled deformed steel bars (4) at two sides, tensioning to a design load, solidifying a glue material of a mortise-tenon reference surface, tensioning a buckling cable to a design cable force, and pouring concrete between the prefabricated reinforced concrete segments (1);
step five, when the wet joint position is constructed, welding the section steel (3), installing finish rolling deformed steel bars (4), tensioning to a designed load for anchoring, tensioning the buckling cables to a designed cable force, and pouring concrete at the wet joint position;
and step six, the step four to the step five are circulated until the main arch rings are closed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010505217.3A CN111749113A (en) | 2020-06-05 | 2020-06-05 | Mortise and tenon connection steel-concrete combined assembly type arch bridge and construction method thereof |
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| CN202010505217.3A CN111749113A (en) | 2020-06-05 | 2020-06-05 | Mortise and tenon connection steel-concrete combined assembly type arch bridge and construction method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663480A (en) * | 2020-12-17 | 2021-04-16 | 安徽建筑大学 | Steel pipe concrete arch bridge |
| CN112761051A (en) * | 2021-01-05 | 2021-05-07 | 广西路桥工程集团有限公司 | Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof |
| CN112761052A (en) * | 2021-02-23 | 2021-05-07 | 广西交科集团有限公司 | Prefabricated UHPC arch bridge segment joint structure and construction method thereof |
| CN113605247A (en) * | 2021-08-25 | 2021-11-05 | 中国十七冶集团有限公司 | Flange type steel box arch springing consolidation structure and construction method |
| CN114517440A (en) * | 2022-01-28 | 2022-05-20 | 中铁二十局集团第四工程有限公司 | Large-section arch rib and construction method thereof |
| CN114808757A (en) * | 2022-05-12 | 2022-07-29 | 长沙理工大学 | Large-span steel concrete arch bridge cantilever construction structure and method under combined system |
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2020
- 2020-06-05 CN CN202010505217.3A patent/CN111749113A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112663480A (en) * | 2020-12-17 | 2021-04-16 | 安徽建筑大学 | Steel pipe concrete arch bridge |
| CN112761051A (en) * | 2021-01-05 | 2021-05-07 | 广西路桥工程集团有限公司 | Prefabricated ultrahigh-performance concrete arch bridge and construction method thereof |
| CN112761052A (en) * | 2021-02-23 | 2021-05-07 | 广西交科集团有限公司 | Prefabricated UHPC arch bridge segment joint structure and construction method thereof |
| CN113605247A (en) * | 2021-08-25 | 2021-11-05 | 中国十七冶集团有限公司 | Flange type steel box arch springing consolidation structure and construction method |
| CN113605247B (en) * | 2021-08-25 | 2023-01-06 | 中国十七冶集团有限公司 | Flange type steel box arch springing consolidation structure and construction method |
| CN114517440A (en) * | 2022-01-28 | 2022-05-20 | 中铁二十局集团第四工程有限公司 | Large-section arch rib and construction method thereof |
| CN114517440B (en) * | 2022-01-28 | 2023-12-12 | 中铁二十局集团第四工程有限公司 | Large-section arch rib and construction method thereof |
| CN114808757A (en) * | 2022-05-12 | 2022-07-29 | 长沙理工大学 | Large-span steel concrete arch bridge cantilever construction structure and method under combined system |
| CN114808757B (en) * | 2022-05-12 | 2023-12-05 | 长沙理工大学 | Construction structure and method for cantilever of large-span steel concrete arch bridge under combined system |
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