CN220246693U - Adjustable active transverse strut device of single-tower cable-stayed bridge - Google Patents
Adjustable active transverse strut device of single-tower cable-stayed bridge Download PDFInfo
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- CN220246693U CN220246693U CN202321936143.4U CN202321936143U CN220246693U CN 220246693 U CN220246693 U CN 220246693U CN 202321936143 U CN202321936143 U CN 202321936143U CN 220246693 U CN220246693 U CN 220246693U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 138
- 239000010959 steel Substances 0.000 claims abstract description 138
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000010276 construction Methods 0.000 abstract description 23
- 238000005452 bending Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
An adjustable active transverse strut device of a single-tower cable-stayed bridge comprises a steel support, a steel support base, a steel support, a mounting platform, a fixed bracket, a loose end and an embedded plate; the embedded plates are symmetrically fixed on the inner sides of two tower columns of the bridge, and the steel support is fixedly connected with the embedded plates; the mounting platforms are positioned under the embedded plates and symmetrically arranged at the inner sides of the two tower columns; a steel support is arranged in a fixed support arranged on the mounting platform, one end of the steel support is connected with the embedded plate to form an integral fixed on the inner side of the tower column on one side, the other end of the steel support is connected with the loose end to form an adjustable device, and the other end of the loose end is fixed on the embedded plate of the tower column on the other side through a loose head. The device not only solves the basic requirement of tower column construction of the tower bridge, but also effectively enhances the stability and safety of the construction of the tower column to the greatest extent, ensures that the tower column is fixedly connected with the active transverse strut at intervals of a certain height to form a frame structure, balances the temporary bending moment of the transverse bridge direction of the tower column, reduces the construction quality problem and reduces the construction cost.
Description
Technical field:
the utility model belongs to the technical field of bridge construction, and particularly relates to the technical field of construction of main towers of drop-type, H-type, A-type and inverted Y-type cable-stayed bridges, in particular to an adjustable active cross brace device of a single-tower cable-stayed bridge.
The background technology is as follows:
with the development of the current foundation construction industry, large-span cross-sea, river-crossing and river-crossing cable-stayed bridges are gradually increased, main tower forms of the cable-stayed bridges are gradually diversified, and the main tower forms are generally in a water drop type, an H type, an A type, an inverted Y type and the like, and are high in construction height, complex in technology, large in body quantity and high in safety coefficient, in order to ensure the stability and safety of a tower column in the construction process, other tower forms except that the tower form design requirements are arranged at the position of the middle tower column, a plurality of transverse struts are generally arranged to form transverse supports for the main tower, so that the two sides of the tower column are not deviated and disturbed, and the construction safety of an upper tower column is ensured.
The utility model comprises the following steps:
the utility model aims to provide an adjustable steel support which is reasonable in design, simple in structure, rapid in splicing and dismantling and suitable for tower column construction, and is mainly used for solving the problem that a tower column is deviated in the tower column construction process, so that the tower column has sufficient safety and stability.
The utility model adopts the following technical scheme to realize the aim:
the utility model provides an adjustable active cross brace device of a single-tower cable-stayed bridge, which comprises a steel support, a steel support base, a steel support, a mounting platform, a fixed bracket, a loose end and a pre-buried plate, wherein the steel support base is arranged on the steel support base; the embedded plates and the tower columns are constructed at the same time and symmetrically fixed on the inner sides of the two tower columns of the bridge, the steel support base, the steel support base and the embedded plates are fixedly arranged, and the top of the steel support base is connected with the steel support base; the mounting platform is positioned under the embedded plate and symmetrically and fixedly arranged at the inner sides of the two tower columns; the installation platform is fixedly provided with a fixing support, a steel support is arranged in the fixing support, one end of the steel support is fixedly connected with the embedded plate through a steel support seat to be integrally fixed on the inner side of the tower column at one side, the other end of the steel support is connected with a movable end to be an adjustable device, a hydraulic jack is used for connection, a steel wedge is used for replacing the jack when the hydraulic jack reaches the design axial force, the movable end is provided with a movable head, and the other end of the movable end is fixed on the embedded plate on the inner side of the tower column at the other side through the movable head; the steel support base is horizontally connected with the movable end, and the fixed support is vertically arranged with the movable end.
The cross section of the embedded plate is rectangular, and the surface of the embedded plate is larger than the steel support base and is vertically connected with the steel support base.
The steel support seat, the steel support base and the embedded plate are fixedly connected in a pairwise vertical mode.
The steel support is assembled in advance and is connected and fixed in a butt joint mode through the flange plate and the high-strength bolts.
The steel support and the steel support between be equipped with the ring flange, be equipped with the bolt hole on the ring flange, the ring flange utilizes high strength bolt to pass the screw hole and connects.
The steel support adopts steel pipes with phi 609 multiplied by 16mm, and the axes of the steel pipes and the embedded plates are positioned at the same central line, so that the stress is balanced.
The steel support and the movable end are made of Q235B type steel.
One end of the steel support is vertically connected with the steel support, the steel support is integrally fixed on the inner side of one tower column through the connection of the steel support and the embedded plate, the other end of the steel support is in socket joint connection with the movable end of the steel support and is fixed on the inner side of the other tower column of the tower column through pressurization of the jack, the jack is firstly pre-pressurized to 10% of the design axial force, if the transverse support has no obvious change, the steel support is fastened through driving a steel wedge into the movable end to replace the jack after the transverse support is continuously pressurized to the design value in a grading manner. The jack is a hydraulic jack.
The steel support base is horizontally connected with the movable end, the movable end is horizontally connected with the steel support by using a flange plate through a high-strength bolt, and the movable end and the steel support base are positioned on the same horizontal plane.
Compared with the prior art, the utility model has the following beneficial effects:
the steel support fixing end is connected with one end of an adjacent steel support through a flange plate, the other end of the steel support is connected with a movable head of a movable end through the flange plate, a fixed steel plate (namely a steel support base) is arranged on the inner side of a tower column of a main tower structure on the opposite side, the fixed steel plate is connected with a steel support base through an embedded plate, and the right end of the flange plate is connected with the movable end of the steel support. The utility model not only solves the basic requirement of the tower bridge, but also effectively enhances the stability and safety of the construction of the tower column to the greatest extent, ensures that the tower column is fixedly connected with the active transverse support at intervals of a certain height to form a frame structure, balances the temporary bending moment of the transverse bridge direction of the tower column, reduces the construction quality problem, and reduces the engineering cost due to the repeated utilization of the steel support.
Description of the drawings:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged view of FIG. 1A;
fig. 3 is an enlarged view of B of fig. 1.
Reference numerals in the drawings:
1-steel support base, 2-steel support base, 3-steel support, 4-mounting platform, 5-fixed bolster, 6-loose end, 7-loose head, 8-ring flange, 9-pre-buried board, 10-tower, 11-construction passageway.
The specific embodiment is as follows:
the present utility model will be further described with reference to the following specific embodiments, which are intended to be illustrative of the principles of the present utility model and not in any way limiting, nor will the same or similar techniques be used in connection with the present utility model beyond the scope of the present utility model.
Referring to fig. 1-3, the present utility model provides an adjustable active cross brace device of a single-tower cable-stayed bridge, which is suitable for constructing a tower column 10 of a bridge, in this embodiment, a main tower of a drop-shaped cable-stayed bridge is taken as an example, the active cross brace device is provided with an upper row and a lower row, five rows of active cross brace devices are total, two active cross brace devices are provided for the upper tower column, three active cross brace devices are provided for the middle tower column, and the five active cross brace devices are connected with the inner sides of the two tower columns 10 and are fixedly connected with corresponding embedded plates 9. The transverse support device comprises a steel support base 1, a steel support base 2, a steel support 3, a mounting platform 4, a fixed support 5, a movable end 6, a movable head 7, a flange 8 and a pre-buried plate 9 which are connected. The embedded plates 9 are symmetrically arranged in advance and fixed on the inner sides of two tower columns 10 of the bridge during construction of the tower columns 10, the cross section of each embedded plate 9 is rectangular, and the surfaces of the embedded plates 9 are slightly larger than the steel support base 2 and are vertically connected with the steel support base 2. The steel support base 1, the steel support base 2 and the embedded plates 9 are welded in a pairwise vertical mode, and the top of the steel support base 2 is connected with the steel support base 1. After the concrete pouring of the elevation of the active transverse support is completed, the construction of the installation platform 4 is carried out, the installation platform 4 is vertically arranged under the embedded plate 9, and the installation platform 4 is fixedly connected with the embedded plate 9 and correspondingly arranged on the inner sides of the two tower columns 10. Be provided with fixed bolster 5 on the mounting platform 4, pre-buried board 9 welds together with mounting platform 5, carries out steel support 3 installation and fixed on the mounting platform 5, is equipped with steel support 3 in the fixed bolster 5, and steel support 3 carries out the hoop with fixed bolster 5 and supports, and steel support 3 is assembled through ring flange 8 in advance and is accomplished, is equipped with ring flange 8 between steel support 3 and the steel support 3, is equipped with the bolt hole on the ring flange 8, and corresponding ring flange 8 utilizes high strength bolt to pass the screw hole and carries out butt joint connection. One end of the assembled steel support 3 is vertically connected with the steel support 1, and is connected with the embedded plate 9 through the steel support 1 to form a whole and fixed on the inner side of the tower column 10 at one side; the steel support 3 adopts steel pipes with phi 609 multiplied by 16mm, so that sufficient strength and rigidity are ensured, the axes of the steel pipes are adjusted to be consistent with the center of the embedded plate 9 and are positioned on the same center line, and the stress is balanced. The other end of the steel support 3 is connected with the movable end 6 to form an adjustable device, the movable end 6 is provided with a movable head 7, the other end of the steel support 3 is in socket joint connection with the movable end 6 and is fixed on an embedded plate 9 on the inner side of another tower column 10 by means of jack pressurization, the jack is a hydraulic jack, 10% of design axial force is pre-pressurized, the cross braces are stable and have no obvious change, the steel support 3 is continuously pressurized in a grading manner until the design axial force is achieved, the jack is used as pressurizing equipment, the cross braces are stable after the jack is pressurized to a design value, namely, after the pressurization is completed for a certain time, a fixed structure can be formed by replacing the jack with steel wedges, and the steel support 3 is fastened. One end of the movable end 6 is in socket connection with the steel support 3, and the other end of the movable end is fixed on an embedded plate 9 on the inner side of a tower column 10 on the other side corresponding to the movable end through a movable head 7; the steel support base 2 is horizontally connected with the loose end 6, the loose end 6 is horizontally connected with the steel support 3 by using a flange 8 through high-strength bolts, and the loose end and the steel support base 2 are positioned on the same axis. The fixed bracket 5 is arranged perpendicular to the movable end 6. The steel support 3 and the movable end 6 are made of Q235B steel. After the tower column is closed, the top is sealed and part of the stay cable is installed, the tensile stress of the tower column 10 is ensured to be in a control range, and the active transverse support device is dismounted.
The working principle of the transverse support device is as follows: after the steel support 3 is hoisted in place, the axis of the steel pipe of the steel support 3 is adjusted to be consistent with the center of the embedded plate 9, and 2 100T jacks are installed at the movable end to apply pressure. Pre-pressing the pressurizing end by 10% of design pressure, pre-adding 50% of design axial force by a hydraulic jack, pressurizing for three times, stopping applying the pre-stress to 15% of the design axial force each time, checking the conditions of the steel support 3 and each part, if abnormal displacement or deformation occurs, timely taking effective measures, if the abnormal displacement or deformation occurs, continuously applying the pre-stress, checking once when the pre-stress is added by 30%, finding the abnormal condition, and timely processing until the pre-stress reaches 100% of the design axial force. The prestressing time should be 5 minutes and the permissible prestressing deviation should be 5KN. After pressurization is completed, the jack is replaced after the movable head 7 is driven into the steel wedge, whether the jack has oil return phenomenon or not is noticed in the process of driving the steel wedge, if the oil return phenomenon exists, the prestress is increased in time, and finally the jack is dismantled.
The construction process of the device is as follows:
1. firstly, laying embedded plates 9 on two inner sides of a tower column 10 of a bridge while constructing the tower column 10.
2. The embedded plate 9 fixedly supports the steel support base 2 and the steel support base 1.
3. According to the construction requirement of the active transverse support, the proper position of the tower column 10 is reasonably selected to construct the construction channel 11 and the mounting platform 4, so that the construction of the movable end 6, the movable head 7, the steel support base 2 and the steel support base 1 is ensured.
4. And (5) performing fixed bracket 5 construction on the mounting platform 4.
5. The steel supports 3 are assembled in advance and are transversely connected with the high-strength bolts through the flange plates 8.
6. After the steel support 3 is assembled, the steel support is lifted to a designated height by a tower crane, one end of the steel support is connected with the embedded plate 9 into a whole, and the other end of the steel support is connected with the movable end 6 into an adjustable device, so that the construction stability and safety of the main tower are ensured.
7. After the tower column capping and the partial stay cable installation are completed, the active transverse support device can be removed by ensuring that the tensile stress of the tower column 10 is within a control range.
Claims (10)
1. An adjustable active transverse strut device of a single-tower cable-stayed bridge is characterized in that: the transverse support device comprises a steel support seat (1), a steel support base (2), a steel support (3), a mounting platform (4), a fixed bracket (5), a movable end (6) and a pre-buried plate (9); the embedded plates (9) are symmetrically fixed on the inner sides of two tower columns (10) of the bridge, the steel support (1), the steel support base (2) and the embedded plates (9) are fixedly arranged, and the top of the steel support base (2) is connected with the steel support (1); the mounting platform (4) is positioned under the embedded plate (9) and symmetrically and fixedly arranged at the inner sides of the two tower columns (10); a fixed support (5) is fixedly arranged on the mounting platform (4), a steel support (3) is arranged on the fixed support (5), one end of the steel support (3) is integrally fixed on the inner side of a tower column (10) on one side through being connected with a steel support base (1) and an embedded plate (9), the other end of the steel support (3) is connected with a movable end (6) to form an adjustable device, the movable end (6) is provided with a movable head (7), and the other end of the movable end (6) is fixed on the embedded plate (9) on the inner side of the tower column (10) on the other side through the movable head (7); the steel support base (2) is horizontally connected with the movable end (6), and the fixed support (5) is vertically arranged with the movable end (6).
2. An adjustable active cross brace apparatus for a single tower cable-stayed bridge according to claim 1, wherein: the cross section of the embedded plate (9) is rectangular, and the surface of the embedded plate (9) is larger than the steel support base (2) and is vertically connected with the steel support base.
3. An adjustable active cross brace apparatus for a single tower cable-stayed bridge according to claim 1, wherein: the steel support base (1), the steel support base (2) and the embedded plate (9) are vertically fixed in pairs.
4. An adjustable active cross brace apparatus for a single tower cable-stayed bridge according to claim 1, wherein: the steel support (3) is assembled in advance, and is connected and fixed in a butt joint mode with the high-strength bolts through the flange (8).
5. The adjustable active cross brace device of the single-tower cable-stayed bridge according to claim 4, wherein the adjustable active cross brace device comprises the following components: the steel support (3) and the steel support (3) are provided with a flange plate (8), the flange plate (8) is provided with bolt holes, and the flange plate (8) is connected by utilizing high-strength bolts to penetrate through the threaded holes.
6. An adjustable active cross brace apparatus for a single tower cable-stayed bridge according to claim 1, wherein: the steel support (3) is a steel pipe with phi 609 multiplied by 16mm, and the axis of the steel pipe and the embedded plate (9) are positioned at the same central line.
7. An adjustable active cross brace apparatus for a single tower cable-stayed bridge according to claim 1, wherein: the steel support (3) and the movable end (6) are made of Q235B type steel.
8. An adjustable active cross brace apparatus for a single tower cable-stayed bridge according to claim 1, wherein: one end of the steel support (3) is vertically connected with the steel support (1), the steel support (1) and the embedded plate (9) are connected into a whole and fixed on the inner side of one side of the tower column (10), the other end of the steel support (3) and the loose end (6) are in socket joint type butt joint and are fixed on the inner side of the other tower column (10) through jack pressurization, and the jack pressurization is performed to a design value and then a steel wedge is driven into the loose head (7) to fasten the steel support (3).
9. The adjustable active cross brace device of the single-tower cable-stayed bridge according to claim 8, wherein the adjustable active cross brace device is characterized in that: the jack is a hydraulic jack.
10. An adjustable active cross brace apparatus for a single tower cable-stayed bridge according to claim 1, wherein: the steel support base (2) is horizontally connected with the movable end (6), the movable end (6) is horizontally connected with the steel support (3) through a flange plate (8) by using high-strength bolts, and the movable end and the steel support base (2) are positioned on the same horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321936143.4U CN220246693U (en) | 2023-07-21 | 2023-07-21 | Adjustable active transverse strut device of single-tower cable-stayed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321936143.4U CN220246693U (en) | 2023-07-21 | 2023-07-21 | Adjustable active transverse strut device of single-tower cable-stayed bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220246693U true CN220246693U (en) | 2023-12-26 |
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ID=89232109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321936143.4U Active CN220246693U (en) | 2023-07-21 | 2023-07-21 | Adjustable active transverse strut device of single-tower cable-stayed bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220246693U (en) |
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2023
- 2023-07-21 CN CN202321936143.4U patent/CN220246693U/en active Active
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