A method for adjusting the posture of the pressure plate of the main tower of a cable-stayed bridge

Abstract

The present invention discloses a method for adjusting the posture of the pressure plate of the main tower of a cable-stayed bridge, comprising the following steps: step S1, setting up a posture adjustment support device; the posture adjustment support device comprises a pressure plate support assembly symmetrically arranged front and back and a posture adjustment assembly located at the top of the pressure plate support assembly; step S2, installing a plurality of docking assemblies located at the bottom end of the pressure plate; the docking assembly is generally triangular in structure; step S3, adjusting the posture of the pressure plate; adjusting the inclination angle of the pressure plate; step S4, temporary consolidation measures and completing the positioning of the pressure plate; symmetrically welding the temporary consolidation plate around the posture adjustment assembly to support the docking assembly, after removing the posture adjustment assembly, extending the support point of the pressure plate support assembly so that the pressure plate support assembly and the docking assembly are in direct contact and support, loosening the pressure plate after the quality is qualified, and completing the positioning of the pressure plate. The method has the advantages of simple operation, convenience and speed, and strong support structure stability.

Description

Technical Field

[0001] The invention belongs to the technical field of adjusting a pressure plate of a main tower of a cable-stayed bridge, and in particular relates to a method for adjusting the posture of a pressure plate of a main tower of a cable-stayed bridge. Background Art

[0002] In recent years, with the continuous increase in the intensity of national infrastructure construction, the construction of cross-river and cross-sea bridges has also increased. The construction attitude control of the steel main tower bearing plate of the cable-stayed bridge has brought great difficulties due to its complex spatial structure, large volume, heavy tonnage, and the need to be installed in an inclined posture. At present, there are usually two conventional practices for the attitude control of large-volume and large-tonnage steel structure components: one is to adopt the construction process of on-site block lifting, assembly, and block attitude adjustment. In this solution, the block lifting requires the temporary fixation of the assembly platform, and the safety of the high-altitude assembly workers on the assembly platform is difficult to ensure; in addition, the posture needs to be adjusted block by block, the construction efficiency is low, and the integrity and welding quality are difficult to ensure; the second is to adopt the construction process of overall lifting and overall adjustment. Although this method ensures construction quality, there are still large errors in the accuracy of attitude adjustment control. Summary of the Invention

[0003] The present invention aims to provide a method for adjusting the posture of the pressure plate of the main tower of a cable-stayed bridge, which can ensure the construction quality of the pressure plate while finely adjusting the posture of the pressure plate of the main tower of a cable-stayed bridge without back cables, and solve the problems of hidden dangers to personal safety caused by the use of block posture adjustment, the inability to guarantee construction quality, and poor posture adjustment control accuracy caused by the use of overall lifting.

[0004] To this end, the technical solution adopted by the present invention is: a method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge, comprising the following steps:

[0005] Step S1, setting up a posture adjustment support device; the posture adjustment support device includes a pressure plate support assembly symmetrically arranged front and back and a posture adjustment assembly located at the top of the pressure plate support assembly, firstly setting out and setting embedded parts, overlapping the pressure plate support assembly based on the embedded parts, then setting transverse rods between the pressure plate support assemblies to connect them, and then installing the posture adjustment assembly;

[0006] Step S2: Install multiple docking assemblies at the bottom end of the pressure plate; the docking assemblies are triangular in structure as a whole, and the inclined bottom surface of the pressure plate is aligned with the inclined surface of the docking assembly at the same angle, and then the grooves provided on the inclined surface are aligned with the reinforcing ribs on the bottom surface of the pressure plate for fixed installation;

[0007] Step S3, adjusting the posture of the pressure plate; placing the pressure plate on the posture adjustment support device according to the designed posture, and allowing the docking assembly to be placed on the posture adjustment assembly, and then adjusting the upper and lower heights of the docking assemblies at different positions through the posture adjustment assembly, thereby adjusting the inclination angle of the pressure plate;

[0008] Step S4, temporary consolidation measures and completion of pressure plate positioning; symmetrically weld the temporary consolidation plate around the posture adjustment component to support the docking component. After removing the posture adjustment component, extend the support point of the pressure plate support component so that the pressure plate support component and the docking component are in direct contact and support. After the quality is qualified, loosen the pressure plate to complete the pressure plate positioning.

[0009] As a preferred embodiment of the above scheme, in step S1, the pressure plate support assembly includes a connecting rod and a group of upright columns arranged from left to right, and an inclined column group with the top end fixed to the column body of the upright column group; the connecting rod, the upright column group, and the inclined column group work together to form the pressure plate support assembly, and the pressure plate support assemblies symmetrically arranged front and back are connected by transverse rods to form an overall support frame. The support structure has strong stability, can meet the load-bearing requirements of the pressure plate to the maximum extent, has good load-bearing effect, and can also stabilize the installation of the posture adjustment assembly;

[0010] The posture adjustment assembly includes a cover plate fixed to the top of the upright column group and a height adjustment device located at the center of the cover plate;

[0011] In step S2, the docking assembly includes an inclined panel, a horizontal panel and a triangular connecting plate. The top surface of the inclined panel is provided with an array of fixed support plates. The slots between the fixed support plates are fitted and connected with the reinforcing ribs on the bottom surface of the pressure plate. The docking assembly can be fully fixed on the pressure plate, the installation stability is strong, and it is ensured that the inclined surface can fit the pressure plate.

[0012] Further preferably, the upright column group includes three equidistantly arranged left columns, middle columns and right columns, and the top ends of the left columns and the right columns are both installed with posture adjustment components. The apex of the middle column and the apex of the installed posture adjustment components are on a line, and the connecting line is parallel to the bottom surface of the pressure plate. Ensuring that the connecting line is flush can effectively and evenly support the pressure plate at the initial stage and share the gravity of the pressure plate. The middle column does not need to be height-adjusted, and only the left and right columns need to be provided with posture adjustment components, thereby saving installation time and manufacturing costs.

[0013] The inclined column group includes two parallel inclined columns with the top ends tilted to the left to fix and support the right column. Since the right column is too high, in order to ensure the stability of the right column and reduce the slenderness ratio of the right rod, the two inclined columns and the connecting rod are used to strengthen the support. The design is reasonable and the shape is ingenious. The frame is erected with the least consumables to achieve optimal support stability, effectively saving manufacturing costs and shortening construction time.

[0014] It is further preferred that the upright column group uses double-piece steel I20b to form the upright columns, the inclined column group uses steel I20b, and the connecting rod uses steel I10, and the selection is appropriate; the connecting rods located in the upright column group are arranged in a step-by-step forked shape, and the three connecting rods located in the inclined column group are perpendicular to the column body and are arranged in parallel at equal distances, which effectively enhances the stability of the overall structure of the pressure plate support assembly, increases the pressure-bearing capacity, and effectively avoids the situation where the pressure plate support assembly cannot bear the weight of the pressure plate, resulting in the inability to adjust the posture of the pressure plate.

[0015] Further preferably, the height adjustment device adopts a three-way jack, which can adjust the height up and down in the X direction. The adjustment method is simple and convenient to operate, and the adjustment precision is high. A left-right symmetrical triangular reinforcement plate is welded between the cover plate and the corresponding upright column to ensure that the cover plate is firmly installed on the upright column.

[0016] It is further preferred that the dimensions of the cover plate are 340mm~350mm in length × 340mm~350mm in width × 10mm in height, which are reasonable and neither too large nor too small, ensuring that the edge of the cover plate has sufficient load-bearing stability. The temporary consolidation plate is a 10mm thick steel plate with moderate thickness, and the upper and lower ends are welded to the horizontal panel and the cover plate respectively, so the welded structure has strong stability.

[0017] It is further preferred that the inclined panel is fitted and fixed on the bottom surface of the pressure plate, and the triangular connecting plates are arranged in groups of three with equal distances from front to back, and are welded in the center between the angles of the inclined panel and the horizontal panel after grouping, so as to ensure the structural stability of the inclined panel and the horizontal panel; the fixed support plates are arranged in groups of four in an array, and are welded in the center on the top surface of the inclined panel after grouping, and horizontal and vertical slots are reserved between the fixed support plates for the horizontal and vertical reinforcing ribs of the pressure plate to fit together, so as to fix the reinforcing ribs of the pressure plate in the horizontal and vertical directions, so as to fully ensure that the docking assembly is installed firmly and securely.

[0018] More preferably, the size of the inclined panel is 530mm~550mm×530mm~550mm, the size of the horizontal panel is 420mm~440mm×420mm~440mm, the size of the triangular connecting plate is 384mm~390mm bottom×242mm high×245mm, and the size of the fixed support plate is 100mm~110mm×

[0019] 100mm~110mm, the size is reasonably designed. The size of the inclined panel is larger than that of the horizontal panel, which is convenient for the installation of the horizontal panel. The size of the fixed support plate ensures that the reinforcing ribs of the pressure plate can be fully extended into the slot.

[0020] It is further preferred that the embedded parts are used to fix the position of the positioning columns, strengthen the installation stability of the columns from the foundation, and thus enhance the load-bearing capacity of the pressure plate support assembly; after the pressure plate is positioned, the left and right outer sides of the pressure plate support assembly and the bottom concrete formwork of the main tower of the cable-stayed bridge without backrest are pulled by pull rods to further strengthen the structural stability of the pressure plate support assembly.

[0021] Beneficial effects of the present invention:

[0022] (1) Compared with the construction process of on-site block hoisting, assembly, and block posture adjustment, this solution does not require the establishment of an assembly platform for temporary fixation, nor does it require assembly personnel to assemble at high altitude, thereby ensuring the personal safety of the workers and saving construction time; compared with the construction plan of overall hoisting and overall adjustment, this plan uses a height adjustment device for fine adjustment, which ensures the construction quality of the pressure plate and can also finely adjust the posture of the pressure plate of the main tower of the cable-stayed bridge without back cables.

[0023] (2) After the posture adjustment assembly at the top of the pressure plate support assembly corresponds to the docking assembly at the bottom of the pressure plate, the height of the horizontal panel of the docking assembly is pressed and adjusted through the height adjustment device of the posture adjustment assembly, thereby adjusting the inclination angle of the pressure plate, that is, adjusting the posture of the pressure plate. The design is ingenious, and there is no need to disassemble the pressure plate. Only the height of the height adjustment device needs to be changed. The posture of the pressure plate can be adjusted with high precision, simple operation, and convenient and fast.

[0024] (3) The docking assembly is a triangular structure as a whole. The triangle has stability. The inclined surface is provided with a slot that fits with the reinforcing ribs on the bottom surface of the pressure plate, which can fully fix the docking assembly on the pressure plate. The installation has strong stability and ensures that the inclined surface can fit the pressure plate. When the docking assembly is docked with the posture adjustment assembly, it can balance the gravity. The design is reasonable and the structural connections are interlocking.

[0025] (4) When the posture adjustment of the pressure plate is completed, temporary support can be provided by the temporary consolidation plate, which can replace the height adjustment device for temporary load-bearing. Compared with the load-bearing capacity of the height adjustment device, the temporary consolidation plate symmetrically arranged vertically around the height adjustment device has an obvious better load-bearing capacity, which avoids the height adjustment device being damaged due to long-term load-bearing in subsequent operations and cannot be recycled.

[0026] In summary, the method has the advantages of simple operation, convenience and speed, and strong supporting structure stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural diagram of the support device for adjusting the posture of the pressure plate.

[0028] Figure 2 This is a schematic diagram of the docking state of the pressure plate lowered to the posture adjustment support device in step S3.

[0029] Figure 3 Schematic diagram of temporary consolidation measures in step S4.

[0030] Figure 4 This is a schematic diagram of the direct contact between the pressure plate support assembly and the docking assembly in step S4.

[0031] Figure 5 for Figure 1 AA cross-section diagram.

[0032] Figure 6 A top view of the pressure plate support assembly.

[0033] Figure 7 It is a front view of the docking assembly.

[0034] Figure 8 for Figure 7 C-direction view. DETAILED DESCRIPTION

[0035] The present invention will be further described below by way of examples and in conjunction with the accompanying drawings:

[0036] Combine Figure 1 — Figure 8 As shown, a method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge is specifically implemented as follows:

[0037] Step S1, setting up a posture adjustment support device; the posture adjustment support device consists of a pressure plate support assembly 1 symmetrically arranged front and back and a posture adjustment assembly 2 located at the top of the pressure plate support assembly 1.

[0038] First, the embedded parts 15 are laid out and set, and the pressure plate support components 1 are overlapped based on the embedded parts 15. Then, the transverse rods 11 are set between the pressure plate support components 1 for connection, and then the posture adjustment components 2 are installed.

[0039] In step S1 , the pressure plate support assembly 1 is composed of a connecting rod 14 , a vertical column group 12 arranged from left to right, and an inclined column group 13 with the top end fixed to the column body of the vertical column group 12 .

[0040] The embedded part 15 is used to fix the position of the positioning column.

[0041] The upright column group 12 consists of three equidistantly arranged left columns 121 , middle columns 122 and right columns 123 .

[0042] The top of the left column 121 and the top of the right column 123 are both installed with a posture adjustment component 2.

[0043] The apex of the center column 122 and the apex of the installed posture adjustment assembly 2 are on a line, and the connecting line is parallel to the bottom surface of the pressure plate 4 .

[0044] The inclined column group 13 is composed of two inclined columns arranged in parallel and with their top ends inclined to the left to fix and support the right column 123.

[0045] The upright column group 12 is formed by double-jointed steel section I20b, the inclined column group 13 is formed by steel section I20b, and the connecting rod 14 is formed by steel section I10.

[0046] The connecting rods 14 in the upright column group 12 are arranged in a step-by-step bifurcated shape, and the three connecting rods 14 in the inclined column group 13 are perpendicular to the column body and are arranged in parallel with equal distances.

[0047] The left end of the connecting rod 14 provided between the left column 121 and the middle column 122 is centrally fixed near the top of the upper part of the left column 121, and the right end is forked and fixed respectively near the upper and lower ends of the middle column 122.

[0048] The connecting rod 14 between the middle column 122 and the right column 123 continues to fork along the end point of the upper connecting rod 14, and the right end is fixed to the upper part of the right column 123 near the top and the lower part near the middle.

[0049] The posture adjustment assembly 2 is composed of a cover plate 21 fixed to the top of the upright column group 12 and a height adjustment device 22 located at the center of the cover plate 21.

[0050] The height adjustment device 22 adopts a three-way jack, and a bilaterally symmetrical triangular reinforcement plate 24 is welded between the cover plate 21 and the corresponding upright column.

[0051] The dimensions of the cover plate 21 are preferably 340 mm to 350 mm in length, 340 mm to 350 mm in width, and 10 mm in height. The temporary consolidation plate 23 is preferably a 10 mm thick steel plate, and its upper and lower ends are welded to the horizontal panel 33 and the cover plate 21 respectively.

[0052] Step S2: installing a plurality of docking assemblies 3 at the bottom end of the pressure plate 4;

[0053] The docking assembly 3 is a triangular structure as a whole. The bottom surface of the inclined pressure plate 4 is fitted with the inclined surface of the docking assembly 3 at the same angle, and then the card groove set on the inclined surface is fitted with the reinforcing ribs on the bottom surface of the pressure plate 4 for fixed installation.

[0054] In step S2, the docking assembly 3 is composed of an inclined panel 31, a horizontal panel 33 and a triangular connecting plate 32. The top surface of the inclined panel 31 is provided with an array of fixed support plates 311, and the card grooves between the fixed support plates 311 are fitted and connected with the reinforcing ribs on the bottom surface of the pressure plate 4.

[0055] The inclined panel 31 is fixed to the bottom surface of the pressure plate 4, and the triangular connecting plates 32 are arranged in groups of three with equal distances from front to back, and are welded in the center between the angles of the inclined panel 31 and the horizontal panel 33 after being grouped.

[0056] The fixed support plates 311 are arranged in groups of four and are welded to the top surface of the inclined plate 31 in the center after being grouped. The fixed support plates 311 leave horizontal and vertical slots for the horizontal and vertical reinforcing ribs of the pressure plate 4 to fit in with each other.

[0057] The size of the inclined panel 31 is preferably 530mm~550mm×530mm~550mm, the size of the horizontal panel 33 is preferably 420mm~440mm×420mm~440mm, the size of the triangular connecting plate 32 is preferably 384mm~390mm bottom×242mm~245mm high, and the size of the fixed support plate 311 is preferably 100mm~110mm×100mm~110mm.

[0058] Step S3: Adjust the posture of the pressure plate 4.

[0059] Lower the pressure plate 4 onto the posture adjustment support device according to the designed posture, and allow the docking component 3 to be placed on the posture adjustment component 2. Then, adjust the upper and lower heights of the docking components 3 at different positions through the posture adjustment component 2 to adjust the inclination angle of the pressure plate 4.

[0060] The corresponding horizontal panels 33 are lifted upward by the jacks on the left column and the right column to adjust the left and right tilt angles of the pressure plate.

[0061] Step S4: temporary consolidation measures and completion of positioning of the pressure plate 4.

[0062] The temporary consolidation plate 23 is symmetrically welded around the posture adjustment component 2 to support the docking component 3. After the posture adjustment component 2 is removed, the support point of the pressure plate support component 1 is extended so that the pressure plate support component 1 and the docking component 3 are in direct contact and support.

[0063] That is, the columns of the repair-welded vertical column group 12 are extended to abut against the horizontal panel 33, thereby providing permanent support.

[0064] Check the quality of the weld. After the quality is qualified, loosen the pressure plate 4 and complete the positioning of the pressure plate 4.

[0065] After the pressure plate 4 is positioned, the left and right outer sides of the pressure plate support assembly 1 are pulled by the pull rod 16 with the bottom concrete formwork of the main tower of the cable-stayed bridge without backrest.

Claims

1. A method for adjusting the posture of a pressure plate of a main tower of a cable-stayed bridge, characterized in that: The following steps are involved: Step S1, setting up a posture adjustment support device; The posture adjustment support device comprises a pressure plate support assembly (1) symmetrically arranged front and rear and a posture adjustment assembly (2) located at the top of the pressure plate support assembly (1), firstly, the embedded parts (15) are laid out and arranged, the pressure plate support assembly (1) is overlapped based on the embedded parts (15), and then a transverse rod (11) is arranged between the pressure plate support assemblies (1) for connection, and then the posture adjustment assembly (2) is installed; Step S2, installing a plurality of docking components (3) located at the bottom end of the pressure plate (4); the docking components (3) are in a triangular structure as a whole, and the inclined bottom surface of the pressure plate (4) is fitted with the inclined surface of the docking components (3) at the same angle, and then the grooves provided on the inclined surface are fitted with the reinforcing ribs on the bottom surface of the pressure plate (4) for fixed installation; Step S3, adjusting the posture of the pressure plate (4); placing the pressure plate (4) on the posture adjustment support device according to the designed posture, and allowing the docking assembly (3) to be placed on the posture adjustment assembly (2), and then adjusting the upper and lower heights of the docking assembly (3) at different positions through the posture adjustment assembly (2), thereby adjusting the inclination angle of the pressure plate (4); Step S4, temporary consolidation measures and completion of the positioning of the pressure plate (4); symmetrically weld the temporary consolidation plate (23) around the posture adjustment component (2) to support the docking component (3); after removing the posture adjustment component (2), extend the support point of the pressure plate support component (1) so that the pressure plate support component (1) and the docking component (3) are in direct contact and support; after the quality is qualified, loosen the pressure plate (4) to complete the positioning of the pressure plate (4); In the step S1, the pressure plate support assembly (1) includes a connecting rod (14), a vertical column group (12) arranged from left to right, and an inclined column group (13) whose top end is fixed to the column body of the vertical column group (12); the posture adjustment assembly (2) includes a cover plate (21) fixed to the top end of the vertical column group (12) and a height adjustment device (22) located at the center of the cover plate (21); in the step S2, the docking assembly (3) includes an inclined panel (31), a horizontal panel (33) and a triangular connecting plate (32); the top surface of the inclined panel (31) is provided with an array of fixed support plates (311), and the slots between the fixed support plates (311) are connected to the reinforcing ribs on the bottom surface of the pressure plate (4).

2. The method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge according to claim 1, characterized in that: The upright column group (12) comprises three equidistantly arranged left columns (121), middle columns (122) and right columns (123), the top ends of the left column (121) and the right column (123) are both installed with posture adjustment components (2), the apex of the middle column (122) and the apex of the installed posture adjustment component (2) are on a line, and the connecting line is parallel to the bottom surface of the pressure plate (4), and the inclined column group (13) comprises two parallel inclined columns, the top ends of which are both tilted to the left to fix and support the right column (123).

3. The method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge according to claim 2, characterized in that: The upright column group (12) is formed of double-jointed steel I20b, the inclined column group (13) is formed of steel I20b, and the connecting rod (14) is formed of steel I10. The connecting rods (14) in the upright column group (12) are arranged in a step-by-step bifurcated shape, and the three connecting rods (14) in the inclined column group (13) are perpendicular to the column body and are arranged in parallel at equal distances.

4. The method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge according to claim 1, characterized in that: The height adjustment device (22) adopts a three-way jack, and a bilaterally symmetrical triangular reinforcement plate (24) is welded between the cover plate (21) and the corresponding upright column.

5. The method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge according to claim 4, characterized in that: The dimensions of the cover plate (21) are 340 mm to 350 mm in length, 340 mm to 350 mm in width, and 10 mm in height. The temporary consolidation plate (23) is a 10 mm thick steel plate, and its upper and lower ends are welded to the horizontal panel (33) and the cover plate (21) respectively.

6. The method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge according to claim 1, characterized in that: The inclined panel (31) is fixed to the bottom surface of the pressure plate (4), the triangular connecting plate (32) is arranged in groups of three pieces at equal distances from each other, and is welded in the center between the angle between the inclined panel (31) and the horizontal panel (33) after being grouped, and the fixed support plate (311) is arranged in groups of four pieces in an array, and is welded in the center to the top surface of the inclined panel (31) after being grouped, and horizontal and vertical slots are left between the fixed support plates (311) for the horizontal and vertical reinforcing ribs of the pressure plate (4) to fit.

7. The method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge according to claim 6, characterized in that: The size of the inclined panel (31) is 530mm-550mm×530mm-550mm, the size of the horizontal panel (33) is 420mm-440mm×420mm-440mm, the size of the triangular connecting plate (32) is 384mm-390mm at the bottom×242mm at the height×245mm, and the size of the fixed support plate (311) is 100mm-110mm×100mm-110mm.

8. The method for adjusting the posture of the bearing plate of the main tower of a cable-stayed bridge according to claim 1, characterized in that: The embedded parts (15) are used to fix the position of the positioning column. After the pressure plate (4) is positioned, the left and right outer sides of the pressure plate support assembly (1) and the bottom concrete formwork of the main tower of the cable-stayed bridge without back cables are pulled through the pull rods (16).

Images