CN111749116A - Mortise and tenon connection assembly type concrete arch bridge section steel temporary connection node and installation method thereof - Google Patents
Mortise and tenon connection assembly type concrete arch bridge section steel temporary connection node and installation method thereof Download PDFInfo
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- CN111749116A CN111749116A CN202010505219.2A CN202010505219A CN111749116A CN 111749116 A CN111749116 A CN 111749116A CN 202010505219 A CN202010505219 A CN 202010505219A CN 111749116 A CN111749116 A CN 111749116A
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- node
- mortise
- tenon
- node unit
- arch bridge
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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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- 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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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node and an installation method thereof, and belongs to the technical field of arch bridges. The connection node includes: the joint unit comprises a plurality of anchor blocks, finish-rolled deformed steel bars and nuts, wherein the anchor blocks are arranged at the edges of the outer peripheral surfaces of the joint unit, the two ends of each finish-rolled deformed steel bar are respectively in threaded connection with the two adjacent anchor blocks on the joint unit, and are matched with the nuts to oppositely draw the two adjacent joint units together. The method adopts measures of gluing and splicing the mortise and tenon on the left splicing section, welding the section steel on the right splicing section, oppositely pulling and finish rolling the deformed steel between the sections, uniformly pouring concrete and the like. Through the structures and measures, the connection mode between the nodes is simplified, the construction speed is greatly accelerated, and the construction quality is guaranteed.
Description
Technical Field
The invention relates to an assembled concrete arch bridge section steel temporary connection node based on mortise and tenon connection and an installation method thereof, and belongs to the technical field of arch bridges.
Background
At present, domestic bridge construction is developing towards prefabrication, factory production and large-scale production. The construction method for constructing the bridge by adopting the prefabricated segment assembly method is a construction method which is widely popularized in the existing bridge construction, and has the advantages of high construction speed, shrinkage and gradual reduction of box girder concrete, small linear change of a girder body after completion and the like.
In the construction of the fabricated arch bridge, the segment assembly can be divided into dry connection and wet connection according to the construction process. The dry method connection is usually provided with a shear key on the joint surface, and the shear force is born by the extrusion of the sound teeth and the friction force of the concrete surface. Although the dry method connection is simple and quick in construction, the bending resistance and the shearing resistance are relatively poor because the joint surface can not transmit tensile force. The wet connection is to splice and hoist segments prefabricated in a factory on site and pour concrete between nodes. The temporary anchoring technology is needed to be adopted between the prefabricated sections, bolts usually penetrate through the top and bottom plates to fix the steel tooth blocks, and the twisted steel bars are finish rolled and pulled on the steel tooth blocks. Because the dead weight of assembled concrete segment is great, including the main arch ring is equipped with the radian, to drawing finish rolling twisted steel very easily by the breaking, lead to interim anchor inefficacy.
Disclosure of Invention
The invention provides a mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node and an installation method thereof.
The utility model provides a mortise and tenon joint assembled concrete arch bridge shaped steel temporary connection node, connected node includes: the joint unit comprises a plurality of anchor blocks, finish-rolled deformed steel bars and nuts, wherein the anchor blocks are arranged at the edges of the outer peripheral surfaces of the joint unit, the two ends of each finish-rolled deformed steel bar are respectively in threaded connection with the two adjacent anchor blocks on the joint unit, and are matched with the nuts to oppositely draw the two adjacent joint units together.
Further, the connection node further includes: the embedded parts are symmetrically arranged inside two ends of the node unit by the central axis of the node unit, and the embedded parts and the section steel are welded together.
Furthermore, the left splicing section of the node unit is a mortise and tenon reference plane.
Furthermore, the node unit is formed by roof, bottom plate and three webs fixed connection, and wherein two webs are connected with roof and bottom plate, constitute the exterior structure of node unit, a remaining web is installed in the node unit and vertical the through the central axis of node unit.
Furthermore, the left ends of the three webs are mortise and tenon reference surfaces.
Further, the anchor block is welded on the embedded part of the node unit.
A method for installing a mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node is applied to the mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node, and comprises the following steps:
step one, after prefabricating a node unit, installing an embedded part on the node unit, and welding an anchor seat;
hoisting the node units to the installed node joints of the arch rings, and carrying out mortise and tenon connection on the node joints of the arch rings through mortise and tenon reference surfaces of the splicing sections;
coating epoxy resin glue on the mortise and tenon contact surface, installing finish-rolled deformed steel bars through anchor blocks on the peripheral surfaces of the node units and the arch ring nodes, and tensioning to a designed load to solidify the glue material on the mortise and tenon contact surface;
and fourthly, hoisting the next node unit to the other end of the existing node unit, connecting the two node units together by welding the section steel on the right splicing section, installing finish rolling deformed steel bars, and tensioning to a design load to realize temporary anchoring.
And fifthly, pouring concrete between the two node units to connect the two node units into a whole.
The main advantages of the invention are:
1. the mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node is prefabricated and processed in a factory, spliced on site and saved in construction time.
2. The node connecting device adopts a method of arranging embedded parts in the segments and welding anchor seats. Need not to punch through box girder top bottom plate, node appearance quality is better.
3. The mortise and tenon connection can realize quick and accurate matching between the nodes, greatly optimizes the complex connection between the traditional prefabricated nodes and improves the construction efficiency.
4. The node connection adopts a method of welding profile steel and finish rolling deformed steel bar by opposite drawing. 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.
5. The joint connection mode can effectively combine dry connection and wet connection, and ensures the rigidity, strength and stability of joint connection.
Drawings
FIG. 1 is a schematic structural diagram of a mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node in a connection state;
fig. 2 is a sectional view of a mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node of the invention in a connection state.
Wherein, 1 is the node unit, 2 is the anchor block, 3 is shaped steel, 4 is finish rolling screw-thread steel, 5 is the built-in fitting, 6 is the nut, 7 is three webs.
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. 1-2, a mortise and tenon joint assembled concrete arch bridge shaped steel temporary connection node includes: node unit 1, anchor chock 2, finish rolling screw-thread steel 4 and nut 6, anchor chock 2 is provided with a plurality ofly, and a plurality of anchor chocks 2 all set up the edge on node unit 1's outer peripheral face, and the both ends of finish rolling screw-thread steel 4 spiro union is between anchor chock 2 on two adjacent node units 1 respectively to with the cooperation of nut 6 with adjacent two node units 1 to drawing together, realize the reliable connection of interim anchor between the node.
The connection node further comprises: the node unit comprises embedded parts 5 and section steel 3, wherein the embedded parts 5 are symmetrically arranged inside two ends of the node unit 1 according to the central axis of the node unit 1, and the section steel 3 is welded on the embedded parts 5 in the node unit 1.
The left end splicing section of the node unit 1 is a mortise and tenon reference surface.
Node unit 1 is formed by roof, bottom plate and three webs 7 fixed connection, and wherein two webs are connected with roof and bottom plate, constitute node unit 1's exterior structure, and a remaining web is installed in node unit 1 and vertical the central axis that passes through node unit 1.
The left ends of the three webs are mortise and tenon reference surfaces.
The mortise and tenon reference surface is actually a groove convex rib, so that accurate connection with a previous node can be guaranteed, concrete can be poured at a vacant position, and the integrity of node connection is guaranteed.
The anchor block 2 is welded to the node unit 1.
A method for installing a mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node is applied to the mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node, and comprises the following steps:
step one, after prefabricating a node unit 1, installing an embedded part 5 on the node unit 1, and welding an anchor base 2;
hoisting the node unit 1 to the installed arch ring node joint, and carrying out mortise and tenon connection on the mortise and tenon reference surface of the splicing section and the arch ring node joint;
thirdly, coating epoxy resin glue on the mortise and tenon contact surface, installing finish-rolled deformed steel bars 4 through the node units 1 and the anchor seats 2 on the peripheral surface of the arch ring node, and tensioning to a designed load to solidify the glue material of the mortise and tenon contact surface;
and fourthly, hoisting the next node unit 1 to the other end of the existing node unit 1, connecting the two nodes together by welding the steel 3 on the right splicing section, installing finish rolling deformed steel bars 4, and tensioning to a design load to realize temporary anchoring.
And fifthly, pouring concrete between the two node units to connect the two node units into a whole.
The following is a specific embodiment, and the main implementation process is as follows: (1) the position of the connecting means is selected according to the cross-sectional form of the box girder, as shown in fig. 1. The embedded parts 5 of the single-box double-chamber section thread reinforcing steel bar are generally arranged in a central symmetry mode through a middle web 7. (2) The left side concatenation section of three webs 7 sets up the recess fin, forms the mortise and tenon reference surface. The effect is that both can guarantee to realize accurate the connection with preceding node, can pour the concrete in vacant department again, guarantees the wholeness of node connection. (3) The joint unit 1 right side concatenation section shaped steel 3 is located the top bottom plate intersection position of three webs 7 and node unit 1, and 6 total shaped steel, concatenation section outside through 4 zonulae occludens of counter-pulling finish rolling screw-thread steel, the effect is the reliable connection of realizing interim anchor 2 between the node unit 1.
The mortise and tenon joint assembly type temporary connection node for the concrete arch bridge section steel provided by the invention adopts measures of gluing and splicing the mortise and tenon on the left splicing section, welding the section steel on the right splicing section, oppositely pulling and finish rolling the deformed steel between the sections, uniformly pouring concrete and the like. Through the structures and measures, the connection mode between the nodes is simplified, the construction speed is greatly accelerated, and the construction quality is guaranteed.
Claims (7)
1. The utility model provides a mortise and tenon joint assembled concrete arch bridge shaped steel temporary connection node, its characterized in that, connected node includes: node unit (1), anchor block (2), finish rolling screw-thread steel (4) and nut (6), anchor block (2) are provided with a plurality ofly, and are a plurality of anchor block (2) all set up edge on the outer peripheral face of node unit (1), the both ends of finish rolling screw-thread steel (4) are spiro union adjacent two respectively on node unit (1) between anchor block (2), and with nut (6) cooperation will be adjacent two node unit (1) is to drawing together.
2. The mortise and tenon joint assembly type concrete arch bridge type steel temporary connection node according to claim 1, further comprising: the node unit comprises embedded parts (5) and section steel (3), wherein the embedded parts (5) are symmetrically arranged inside two ends of the node unit (1) with the central axis of the node unit (1), and the section steel (3) is welded between the embedded parts (5) in two adjacent node units (1).
3. The mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node according to claim 2, wherein the left end splicing section of the node unit (1) is a mortise and tenon reference plane, and the right end splicing section is a section steel connection reference plane.
4. The mortise and tenon joint assembly type concrete arch bridge type steel temporary connection node according to claim 3, wherein the node unit (1) is formed by fixedly connecting a top plate, a bottom plate and three webs (7), wherein two webs are connected with the top plate and the bottom plate to form an external structure of the node unit (1), and the remaining web is installed in the node unit (1) and vertically passes through the central axis of the node unit (1).
5. The mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node according to claim 4, wherein the left ends of the three webs are mortise and tenon reference surfaces.
6. A mortise and tenon jointed assembly type concrete arch bridge type steel temporary connection node according to claim 1, wherein the anchor blocks (2) are welded to the node units (1).
7. A method for installing a mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node, which is applied to the mortise and tenon joint assembly type concrete arch bridge section steel temporary connection node in any one of claims 1 to 6, and is characterized by comprising the following steps of:
step one, after prefabricating a node unit (1), installing an embedded part (5) on the node unit (1), and welding an anchor seat (2);
hoisting the node unit (1) to the installed arch ring node joint, and carrying out mortise and tenon connection on the mortise and tenon reference surface of the splicing section and the arch ring node joint;
thirdly, coating epoxy resin glue on the mortise and tenon contact surface, installing finish-rolled deformed steel bars (4) through the node units (1) and the anchor seats (2) on the peripheral surface of the arch ring node, and tensioning to a designed load to solidify the glue material of the mortise and tenon contact surface;
and fourthly, hoisting the next node unit (1) to the other end of the existing node unit (1), connecting the two node units together by welding the section steel (3) on the right splicing section, installing finish rolling deformed steel bars (4), and tensioning to a designed load to realize temporary anchoring.
And fifthly, pouring concrete between the two node units to connect the two node units into a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010505219.2A CN111749116A (en) | 2020-06-05 | 2020-06-05 | Mortise and tenon connection assembly type concrete arch bridge section steel temporary connection node and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010505219.2A CN111749116A (en) | 2020-06-05 | 2020-06-05 | Mortise and tenon connection assembly type concrete arch bridge section steel temporary connection node and installation method thereof |
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| CN111749116A true CN111749116A (en) | 2020-10-09 |
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| CN202010505219.2A Pending CN111749116A (en) | 2020-06-05 | 2020-06-05 | Mortise and tenon connection assembly type concrete arch bridge section steel temporary connection node and installation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2020
- 2020-06-05 CN CN202010505219.2A patent/CN111749116A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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