A temporary restraint system and construction method for a cable-stayed bridge

Abstract

The present invention discloses a temporary restraint system and construction method for a cable-stayed bridge, and relates to the technical field of bridge construction. The temporary restraint system for a cable-stayed bridge includes a vertical restraint module and a longitudinal restraint module; the vertical restraint module includes a tie beam, an abutment block, a connecting rod, and a sling; the top surface of the abutment block is provided with an inclined top surface that can adapt to fit the inclined bottom surface of the lower cross beam; a diagonal support bolt that can be screwed out obliquely upward is inserted into the tie beam, and an abutment ball is provided at the end of the diagonal support bolt; the abutment ball can abut at the angle between the inclined bottom surface of the lower cross beam and the inclined side surface of the side support column, thereby realizing the lateral limitation of the tie beam and the abutment block, and further making the two inclined top surfaces and the two inclined bottom surfaces respectively adapt to fit and stably press-connect. The abutment ball is made of a brittle material that can be crushed under pressure, providing an accommodating space for the slight upward movement of the diagonal support bolt, and transforming the abutment block and the lower cross beam from a contact state to a compressed state without the need for additional manual operation.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and in particular to a temporary restraint system and a construction method for a cable-stayed bridge. Background Art

[0002] Cable-stayed bridges are constructed from a number of spliced steel box girders. During construction, the diagonal cables exert an upward tension on the steel box girders. This tension has both vertical (upward) and longitudinal (longitudinal) components. Since the steel box girders are in a cantilevered state, they transfer upward and lateral forces to the underlying supports (the bottom of the supports are set within the base layer and the top is connected to the steel box girders), causing damage to the supports (such as strain and bending). Therefore, temporary restraints are required to prevent support damage and ensure smooth subsequent construction.

[0003] The Chinese patent "Limiting device and cable-stayed bridge containing the limiting device" (publication number: CN 207727408 U) discloses a technical solution for achieving longitudinal (longitudinal direction along the length of the cable-stayed bridge) limiting of the steel box girder and the lower crossbeam by providing a Z-shaped first connecting seat, a second connecting seat and a connecting rod.

[0004] The Chinese patent, "A Three-Way Temporary Consolidation Structure for Towers and Beams of a Long-Span Cable-Stayed Bridge" (Publication No. CN203866711U), discloses a technical solution for vertically connecting a steel box girder and lower crossbeam using vertical slings. However, this requires numerous slings and sling points, resulting in cumbersome construction steps and low efficiency. Summary of the Invention

[0005] In order to overcome the problem in the above background technology that "the traditional cable-stayed bridge has a large number of slings and sling points in the restraint system, resulting in low construction efficiency", the present invention provides a temporary restraint system and construction method for a cable-stayed bridge.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a temporary restraint system for a cable-stayed bridge, including a vertical restraint module and a longitudinal restraint module; the vertical restraint module includes a tension beam, an abutment block, a connecting rod and a sling; the tension beams are provided with two and are arranged parallel to each other, the abutment blocks are provided with four and are arranged in pairs on the top surfaces of the two tension beams, and the two abutment blocks located on the top surfaces of different tension beams and arranged oppositely are fixedly connected by the connecting rod; the top end of the sling is tensioned with the steel box beam, and the bottom end is tensioned with the tension beam Pull connection; the top surface of the abutment block is provided with an inclined top surface that can adapt to the inclined bottom surface of the lower cross beam; a diagonal support bolt that can be screwed out obliquely upward is inserted in the tension beam, and the diagonal support bolt includes a stud and a column head fixedly arranged at one end of the stud, and an abutment ball is detachably installed on the end of the stud away from the column head; the abutment ball can abut the angle position between the inclined bottom surface of the lower cross beam and the inclined side surface of the side support column, thereby realizing lateral limitation of the tension beam and the abutment block; the abutment ball is made of brittle material.

[0007] As a further optimization solution of the present invention, a vertical hole is provided in the tension beam, and a sleeve capable of longitudinal rotation is provided in the vertical hole; the stud is inserted into the sleeve, and the external thread of the stud is adapted to and screwed with the internal thread of the inner wall of the sleeve.

[0008] As a further optimization solution of the present invention, the abutting ball is spherical, and the end of the stud is located at the center of the abutting ball.

[0009] As a further optimization solution of the present invention, a telescopic component is provided in the upper middle part of the sling, a first gap with a vertical cross-section in the shape of a U is provided between the steel box girder and the lower crossbeam, and the telescopic component is partially placed in the end of the first gap.

[0010] As a further optimization solution of the present invention, the longitudinal restraint module is arranged in the first gap.

[0011] As a further optimization scheme of the present invention, the longitudinal constraint module includes a limiter, and the limiter includes a first mounting seat, a second mounting seat and a transverse tie rod connected in a Z shape, and the two ends of the transverse tie rod are respectively connected to the first mounting seat and the second mounting seat; the first mounting seat is adhered to and fixedly connected to the bottom surface of the steel box beam, and the second mounting seat is adhered to and fixedly connected to the top surface of the lower cross beam.

[0012] As a further optimization solution of the present invention, two first protrusions are provided in the middle of the top surface of the lower cross beam, and four limiters are provided and are arranged in pairs on both sides of the two first protrusions.

[0013] As a further optimization scheme of the present invention, the first mounting seat includes a first horizontal plate and two first vertical plates fixedly arranged on the lower surface of the first horizontal plate, the end of the horizontal tie rod is inserted between the two first vertical plates, and the end of the horizontal tie rod is rotatably connected to the first vertical plate; the upper surface of the first horizontal plate is affixed to and fixedly connected to the bottom surface of the steel box girder.

[0014] As a further optimization scheme of the present invention, the second mounting seat includes a second horizontal plate and two second vertical plates fixedly arranged on the upper surface of the second horizontal plate, the end of the horizontal tie rod is inserted between the two second vertical plates, and the end of the horizontal tie rod is rotatably connected to the second vertical plate; the bottom surface of the second horizontal plate is affixed to and fixedly connected to the top surface of the lower cross beam.

[0015] A construction method for a temporary restraint system for a cable-stayed bridge, comprising: adopting the temporary restraint system for a cable-stayed bridge to pull and connect the steel box girder, and the steps comprising: S1, connecting the steel box girder and the lower crossbeam using the longitudinal restraint module; S2, connecting the pulling beam, the abutment block and the connecting rod; S3, suspending the pulling beam, the abutment block and the connecting rod below the lower crossbeam using the sling; S4, starting the telescopic assembly until the inclined top surface and the inclined bottom surface fit together; S5, rotating the diagonal support bolt until the abutment ball abuts at the angle between the inclined bottom surface and the inclined side form; S6, starting the telescopic assembly until the inclined top surface and the inclined bottom surface are pressed against each other; during the process, the abutment ball is crushed under pressure.

[0016] In summary, the present invention has at least one of the following advantages:

[0017] (1) The temporary restraint system of the cable-stayed bridge includes a vertical restraint module and a longitudinal restraint module. The vertical restraint module is used to apply a downward tensile force to the steel box girder through the lower crossbeam and the sling. The tensile force is not less than the vertical component of the force from the inclined sling on the steel box girder, thereby preventing the steel box girder from exerting an upward pull on the support, thereby preventing the support from being damaged or pulled out of the base due to the upward pull, resulting in a decrease in stability. The longitudinal restraint module applies a horizontal (i.e. longitudinal, i.e., along the length of the cable-stayed bridge) limiting force to the steel box girder, thereby preventing the steel box girder from horizontal displacement, thereby preventing the top of the support from bending and deformation.

[0018] (2) The present invention has a simple structure and reliable functions. It utilizes a tie beam, abutment blocks and connecting rods to achieve connection with the bottom surface of the lower cross beam, which can greatly reduce the number of slings and lifting points required, thereby simplifying the construction steps and improving construction efficiency.

[0019] (3) The top surface of the abutment block is provided with an inclined top surface, which can adapt to and press the inclined bottom surface of the lower crossbeam, thereby avoiding the problem in traditional technology that the tension beam / sling easily slips between the inclined bottom surface (the reason for the slip is that the four telescopic components are lifted asynchronously, resulting in eccentric load, or the inclined top surface is adhered to dust, resulting in insufficient friction), thereby improving the structural stability of the present invention, ensuring the constraint stability of the steel box beam, and improving construction safety.

[0020] (4) Several inclined top surfaces are connected and fixed by tie beams and connecting rods to form a whole, which further avoids the problem of easy slipping between the tie beams / slings and the inclined bottom surfaces caused by the independent setting of the tie beams / slings in traditional technologies.

[0021] (5) A diagonal support bolt that can be screwed out obliquely upward is inserted into the connecting beam, and a contact ball is detachably installed at the end of the diagonal support bolt. The diagonal support bolt can push the contact ball to contact the angle between the inclined bottom surface of the lower crossbeam and the inclined side surface of the side support column, thereby realizing the lateral limitation of the connecting beam and the contact block. The user adjusts the diagonal support bolts on both sides respectively, and can accurately limit the connecting rod to the middle position of the bottom surface of the lower crossbeam, so that the position of the inclined top surface on both sides is adapted to the position of the inclined bottom surface on both sides, so that the inclined top surface and the inclined bottom surface can be adapted and fitted when the contact block is lifted vertically later, thereby avoiding the problem that the vertical constraint module cannot be stably installed due to the inability of the two to adapt and fit.

[0022] (6) The abutment ball can be crushed under pressure, thereby providing space for the slight upward movement of the tension beam, abutment block, connecting rod and diagonal support bolt. Without the need for additional manual operation (such as manually removing the abutment ball or rotating the diagonal support bolt to retract it), the abutment block and the lower beam are transformed from a contact state to a compression state, reducing the number of operating steps, making it convenient and quick, and improving construction efficiency.

[0023] (7) The abutment ball is spherical, and the end of the stud is located at the center of the abutment ball. Therefore, no matter to which angle the abutment ball rotates, there will be a certain distance between the end of the stud and the inclined bottom surface. This distance is used to provide movement space for the stud end to move slightly upward, avoiding the problem of the stud being overloaded and bent due to the direct crimping angle of the stud end. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present application is further described below with reference to the accompanying drawings:

[0025] Figure 1 It is a front view schematic diagram of the overall structure of the present invention;

[0026] Figure 2 Schematic diagram of the connection structure of the tension beam, the abutment block and the connecting rod;

[0027] Figure 3 Schematic diagram of the position and structure of the inclined top surface;

[0028] Figure 4 This is a schematic diagram showing a state where the inclined top surface and the inclined bottom surface cannot fit together;

[0029] Figure 5 This is a schematic diagram of the position and structure of the diagonal bracing bolts;

[0030] Figure 6 A schematic diagram of the angle between the inclined bottom surface and the inclined side surface when the abutting ball abuts against the inclined bottom surface;

[0031] Figure 7 It is a schematic diagram of the position and structure of the vertical hole and sleeve from an oblique side view;

[0032] Figure 8 It is a schematic diagram of the position and structure of the vertical hole and sleeve in a vertical section front view;

[0033] Figure 9 It is a left view schematic diagram of the position and structure of the longitudinal restraint module;

[0034] Figure 10 This is a top view of the limiter installation status;

[0035] Figure 11 Schematic diagram of the front view of the limiter structure;

[0036] Figure 12 This is a schematic diagram of the angled state of the diagonal bracing bolts;

[0037] Figure 13 Schematic diagram of the connection structure between the main rod body and the mounting block;

[0038] Figure 14 Schematic diagram of the position and structure of the support.

[0039] Description of reference numerals:

[0040] In the figure,

[0041] 1. Vertical constraint module; 11. Tension beam; 1101. Main rod; 1102. Mounting block; 111. Diagonal brace bolt; 112. Abutment ball; 113. Vertical hole; 114. Sleeve; 12. Abutment block; 121. Inclined top surface; 13. Connecting rod; 14. Sling; 141. Telescopic assembly;

[0042] 2. Longitudinal restraint module; 21. First mounting seat; 211. First transverse plate; 212. First vertical plate; 22. Second mounting seat; 221. Second transverse plate; 222. Second vertical plate; 23. Tie rod;

[0043] 3. Steel box girder; 31. First anti-collision block;

[0044] 4. Lower crossbeam; 41. Inclined bottom surface; 42. First protrusion;

[0045] 5. Side support column; 51. Inclined side; 52. Second anti-collision block;

[0046] 6. Support. DETAILED DESCRIPTION

[0047] Based on the above structural features of the present application, the implementation methods of the present application are further described:

[0048] Reference Figures 1 and 2 This embodiment provides a temporary restraint system for a cable-stayed bridge, comprising a vertical restraint module 1 and a longitudinal restraint module 2. The vertical restraint module 1 is used to apply a vertical tension-limiting force to the steel box girder 3, while the longitudinal restraint module 2 is used to apply a horizontal tension-limiting force to the steel box girder 3, thereby balancing the tension from the oblique slings 14 and temporarily restraining the steel box girder 3 in the bridge pier to facilitate subsequent construction operations.

[0049] Reference Figures 1 and 2 The vertical constraint module 1 includes a tie beam 11, an abutment block 12, a connecting rod 13, and a sling 14. Two tie beams 11 are provided and arranged parallel to each other. The two tie beams 11 are respectively arranged below the two inclined bottom surfaces 41 of the lower crossbeam 4. Four abutment blocks 12 are provided and arranged in pairs on the top surfaces of the two tie beams 11 (for example, through an integral fixed connection or through bolted connection). The two abutment blocks 12 located on the top surfaces of different tie beams 11 and arranged opposite each other are fixedly connected by a connecting rod 13 (for example, through bolted connection). The top end of the sling 14 is connected to the steel box girder 3 (for example, through anchoring to achieve fixed connection), and the bottom end is connected to the tie beam 11 (for example, through anchoring to achieve fixed connection).

[0050] Reference Figures 1 and 2 The two tension beams 11 and the two connecting rods 13 are spliced into a U-shaped frame structure, thereby improving the structural stability and stably applying downward tension to the steel box beam 3 through the sling 14.

[0051] Reference Figure 2 and Figure 3 The top surface of the abutment block 12 is provided with an inclined top surface 121, which can adapt to the inclined bottom surface of the lower crossbeam 4. When the inclined top surface 121 and the inclined bottom surface 41 are adapted to fit and press-fit, they can have a larger contact surface, improve stability, and prevent unbalanced loading, shaking, and slippage caused by uneven contact surface settings, greatly improving constraint stability and ensuring construction safety.

[0052] Reference Figure 4Since the two inclined bottom surfaces 41 of the lower crossbeam 4 are arranged in a bilaterally symmetrical manner, when the positions of the two sets of abutment blocks 12 are not axisymmetric (because the four telescopic components 141 cannot operate and lift the tension beam 11 in an absolutely synchronous state) and cannot adapt to the positions of the two inclined bottom surfaces 41 (that is, the positions of the tension beam 11, the abutment blocks 12 and the connecting rod 13 are laterally offset), the inclined top surface 121 will not be able to adapt to the inclined bottom surface 41, and thus the vertical constraint module 1 cannot be stably installed. Since dust usually adheres to the inclined bottom surface 41 during construction, when the inclined bottom surface 41 and the inclined top surface 121 are pressed against each other, dust particles roll between the inclined bottom surface 41 and the inclined top surface 121, resulting in insufficient friction between the inclined bottom surface 41 and the inclined top surface 121, which will also cause the tension beam 11, the abutment blocks 12 and the connecting rod 13 to be laterally offset, and thus the inclined top surface 121 and the inclined bottom surface 41 cannot be adapted to fit together, and the vertical constraint module 1 cannot be stably installed. To avoid such problems, refer to Figure 5 and Figure 6 A diagonal brace bolt 111 is inserted into the connecting beam 11 and can extend obliquely upward and outward. The diagonal brace bolt 111 includes a stud and a stud fixed to one end of the stud (e.g., through an integral fixed connection). An abutment ball 112 is detachably mounted on the end of the stud away from the stud (e.g., detachably connected by a thread). The diagonal brace bolt 111 can push the abutment ball 112 to abut the angle (tip) between the inclined bottom surface 41 of the lower crossbeam 4 and the inclined side surface 51 of the side support column 5, thereby achieving lateral positioning of the connecting beam 11 and the abutment block 12. The user can adjust the extension length of the diagonal brace bolts 111 on both sides to limit the connecting rod 13 to the middle position of the bottom surface of the lower crossbeam 4, thereby making the positions of the inclined top surfaces 121 on both sides symmetrical and adapted to the positions of the inclined bottom surfaces 41 on both sides. This allows the inclined top surfaces 121 and the inclined bottom surfaces 41 to be adapted and pressed together when the abutment block 12 is later vertically lifted, thereby achieving a stable connection.

[0053] After the construction of this construction node is completed, the present invention is transferred to and installed at other construction node locations, and a new abutment ball 112 needs to be screwed and installed. Therefore, the abutment ball 112 can be detachably installed at the end of the stud away from the column head, thereby achieving convenient replacement.

[0054] Reference Figure 4 The inclined side surface 51 is a vertical plane structure, with the bottom end of the inclined side surface 51 tilted inward and the top end tilted outward, thereby forming an angle with the inclined bottom surface 41. The inner end of the inclined bottom surface 41 tilts upward and the outer end tilts downward, which is used to achieve the transition between the lower crossbeam 4 and the side support column 5.

[0055] The abutment ball 112 is made of brittle material, such as ceramic, glass, etc., so as to achieve temporary limitation of the tension beam 11, and avoid hindering the slight upward movement of the abutment block 12 by breaking it (in the process of the abutment block 12 and the lower beam 4 changing from contact to compression, the rubber sheet is compressed and becomes thinner, and the abutment block 12 will move slightly upward).

[0056] Reference Figure 6 The abutment ball 112 is spherical, and the end of the stud is located at the center of the abutment ball 112. No matter to which angle the diagonal support bolt 111 and the abutment ball 112 are rotated (with the axis of the diagonal support bolt 111 as the rotation center), there will be a certain distance between the end of the stud and the inclined bottom surface 41 (this distance is usually more than 5 cm, and can be achieved by selecting an abutment ball 112 with a radius greater than 5 cm; this distance is filled with the abutment ball 112 and cannot present a gap shape). This distance is used to slightly move the end of the stud upward (under the pull of the sling 14, The tension beam 11, the abutment block 12, the connecting rod 13 and the diagonal bracing bolt 111 will move upward slightly synchronously) to provide movement space, so as to avoid the problem of the stud end being directly pressed against the angle during the slight upward movement, causing the stud to be overloaded and bent (after the stud is bent, its end and the abutment ball 112 will have a larger rotation radius when the stud rotates, that is, the abutment ball 112 cannot rotate around its own axis. Then, after the present invention is circulated to other construction nodes, the newly installed abutment ball 112 cannot be adapted to abut against the tip of the angle of the corresponding node, resulting in reduced stability of the present invention).

[0057] When the contact ball 112 is crushed under pressure, the end of the stud (the end located at the center of the ball) will move upward slightly.

[0058] Reference Figure 6 The end where the column head of the diagonal support bolt 111 is located is tilted downward, so that it is convenient for the user to manually grab or use an electric screwdriver to buckle and rotate the column head, which is convenient, simple and reliable to operate.

[0059] The tension beam 11 and the connecting rod 13 are both arranged transversely.

[0060] Reference Figure 1 、 Figure 7 and Figure 8A vertical hole 113 is provided in the tie beam 11, and a sleeve 114 capable of longitudinal rotation is provided in the vertical hole 113; the sleeve 114 is rotatably connected to the side wall of the vertical hole 113 (for example, via a rotating shaft). The stud is inserted into the sleeve 114, and the external thread of the stud is adapted to and screwed into engagement with the internal thread on the inner wall of the sleeve 114. The user can grasp the stud head and rotate the diagonal support bolt 111, thereby driving the end of the stud away from the stud head to extend outward or retract inward. Due to precision errors during the connection (for example, casting) between the lower crossbeam 4 and the side support column 5, the angle (tip) between the inclined side surface 51 of the side support column 5 and the inclined bottom surface 41 of the lower crossbeam 4 is different relative to the tie beam 11 at different construction nodes. Therefore, the diagonal support bolt 111 needs to be both retractable and rotatable, so that vertical constraint modules 1 of the same specifications can be adapted, tightened, and installed on different lower crossbeams 4 and side support columns 5.

[0061] Diagonal bracing bolts 111 are respectively installed at both ends of the same tension beam 11 and abut against the aforementioned angle, thereby preventing the tension beam 11 from tilting laterally.

[0062] Reference Figure 5 A telescopic component 141 is provided in the upper part of the sling 14. The telescopic component 141 adopts, for example, an anchor with adjustable length or an electric hoist. The sling 14 includes a first cable body and a second cable body arranged in a collinear manner. When an anchor is adopted: the top end of the first cable body is connected to the steel box girder 3, and the bottom end is connected to the top lifting ring of the anchor; the top end of the second cable body is connected to the bottom lifting ring of the anchor, and the bottom end is connected to the connecting beam 11. When an electric hoist is adopted: the top end of the first cable body is connected to the steel box girder 3, and the bottom end is connected to the top lifting ring of the electric hoist; the top end of the second cable body is connected to the bottom lifting ring of the steel cable of the electric hoist, and the bottom end is connected to the connecting beam 11. The telescopic component 141 is used to lift the connecting beam 11, so that the abutment block 12 presses the lower crossbeam 4, further realizing the tension between the steel box girder 3 and the lower crossbeam 4.

[0063] Reference Figure 5 A first gap, with a U-shaped vertical cross-section, is defined between the steel box girder 3 and the lower crossbeam 4. The telescopic assembly 141 is partially positioned within the end of the first gap. Positioning the telescopic assembly 141 within the height range of the end of the first gap facilitates operation by the user. (When the telescopic assembly 141 is pressed against the side wall of the lower crossbeam 4, it is difficult for the user to operate it due to a lack of available space.)

[0064] Reference Figure 1 , the longitudinal restraint module 2 is arranged in the first gap.

[0065] Reference Figure 1 、 Figures 9 to 11The longitudinal restraint module 2 includes a limiter, which includes a first mounting seat 21, a second mounting seat 22 and a transverse rod 23 connected in a Z shape, and the two ends of the transverse rod 23 are respectively connected to the first mounting seat 21 and the second mounting seat 22; the first mounting seat 21 is attached to and fixedly connected to the bottom surface of the steel box girder 3 (for example, fixedly connected by bolts and / or welding), and the second mounting seat 22 is attached to and fixedly connected to the top surface of the lower cross beam 4 (for example, fixedly connected by bolts and / or welding).

[0066] Reference Figures 9 to 11 Two first protrusions are provided in the middle of the top surface of the lower cross beam 4 (for example, through an integrated fixed connection), and four limiters are provided and are arranged in pairs on both sides of the two first protrusions.

[0067] Reference Figure 11 The first mounting seat 21 includes a first transverse plate 211 and two first vertical plates 212 fixedly arranged on the lower surface of the first transverse plate 211 (for example, fixedly connected by bolts or fixedly connected in one piece), the end of the transverse rod 23 is inserted between the two first vertical plates 212, and the end of the transverse rod 23 is rotatably connected to the first vertical plate 212; the upper surface of the first transverse plate 211 is attached to and fixedly connected to the bottom surface of the steel box girder 3 (for example, fixedly connected by bolts and / or welding).

[0068] Reference Figure 11 The second mounting seat 22 includes a second transverse plate 221 and two second vertical plates 222 fixedly arranged on the upper surface of the second transverse plate 221 (for example, fixedly connected by bolts or fixedly connected in one piece), the end of the transverse rod 23 is inserted between the two second vertical plates 222, and the end of the transverse rod 23 is rotatably connected to the second vertical plates 222; the bottom surface of the second transverse plate 221 is attached to and fixedly connected to the top surface of the lower cross beam 4 (for example, fixedly connected by bolts and / or welding).

[0069] Reference Figure 9 The tie rod 23 is connected to the first vertical plate 212 via a pin, and the tie rod 23 is connected to the second vertical plate 222 via a pin. During use, the first mounting seat 21 is first installed on the bottom surface of the steel box girder 3 and the second mounting seat 22 is installed on the top surface of the lower crossbeam 4. The steel box girder 3 is then hoisted and lowered until the first mounting seat 21 and the second mounting seat 22 are at the same height; then the first mounting seat 21 and the second mounting seat 22 are connected via the tie rod 23.

[0070] Reference Figure 12After the abutment ball 112 is crushed under pressure, the user continues to unscrew the diagonal support bolt 111 until the end of the stud directly abuts against the angle between the inclined bottom surface 41 and the inclined side surface 51, further improving the installation stability of the vertical constraint module 1 (after the temporary constraint is completed, vibration will inevitably be generated in the subsequent construction and transmitted to the lower crossbeam 4 and the side support column 5. Then, after the abutment ball 112 is lost as support between the diagonal support bolt 111 and the angle, the tension beam 11, the abutment block 12, and the connecting rod 13 are still at risk of lateral slippage, so the diagonal support bolt 111 is continued to be unscrewed until the diagonal support bolt 111 abuts against the angle).

[0071] Reference Figure 2 、 Figure 7 and Figure 13 The tension beam 11 includes a main rod body 1101 and a mounting block 1102, and the mounting block 1102 is in the shape of a U.S. The mounting block 1102 is detachably mounted in a rectangular groove at the end of the main rod body 1101 (for example, detachable mounting is achieved by bolts). The vertical hole 113 is provided in the middle of the mounting block 1102. Removing the mounting block 1102 from the main rod body 1101 can disengage the end of the stud from the angle position (for the removal of the vertical constraint module 1), thereby avoiding the problem of difficulty in rotating and retracting the diagonal support bolt 111. The reasons why the diagonal support bolt 111 is difficult to rotate include: water rusting in the gap between the stud and the sleeve 114, dust getting stuck in the gap between the stud and the sleeve 114, and the stud being bent due to an accidental impact.

[0072] A friction plate is fixed to the upper surface of the inclined top surface 121 (for example, by bonding or bolting), thereby increasing friction with the inclined bottom surface 41 to improve the crimping stability. The friction plate is a rubber plate with friction lines on the surface.

[0073] Reference Figure 1 A first anti-collision block 31 is fixedly installed at the end surface position of the steel box girder 3 (for example, fixedly connected by bolts), and a second anti-collision block 52 is fixedly installed on the inner wall of the side support column 5 (for example, fixedly connected by bolts), and the height positions of the first anti-collision block 31 and the second anti-collision block 52 are adapted; when the steel box girder 3 and the side support column 5 are close to each other (for example, the steel box girder 3 needs to be hoisted before installing the vertical constraint module 1 and the longitudinal constraint module 2, and the steel box girder 3 in the hoisted state will shake), the first anti-collision block 31 and the second anti-collision block 52 collide with each other, thereby avoiding direct contact between the steel box girder 3 and the side support column 5, so as to protect the steel box girder 3 and the side support column 5 from collision damage.

[0074] Reference Figure 1Two side support columns 5 are provided, one at each end of the lower crossbeam 4. The side support columns 5 are fixedly connected to the lower crossbeam 4 in an H-shaped configuration (e.g., by bolts or by cast reinforced concrete). The vertical cross-section of each side support column 5 is a horizontally arranged V-shaped column, with the openings of the two V-shaped side support columns 5 facing each other. An inclined side surface 51 is provided at the lower portion of the inner side wall of each side support column 5.

[0075] Reference Figure 6 The abutment ball 112 is provided with a mounting screw hole, which is arranged along the radial direction of the abutment ball 112; the end of the stud can be inserted into the mounting screw hole and detachably connected through a thread, thereby realizing the replacement of the abutment ball 112.

[0076] A construction method of a temporary restraint system for a cable-stayed bridge, using the temporary restraint system for a cable-stayed bridge to pull and connect a steel box girder 3, comprising the following steps:

[0077] S1. Connect the steel box girder 3 and the lower cross beam 4 using the longitudinal restraint module 2.

[0078] S2, connecting the tension beam 11, the abutment block 12 and the connecting rod 13.

[0079] S3. Use the sling 14 to hang the tension beam 11, the abutment block 12 and the connecting rod 13 below the lower cross beam 4.

[0080] S4, start the telescopic assembly 141 until the inclined top surface 121 and the inclined bottom surface 41 are adapted to fit together.

[0081] S5 , rotating the diagonal support bolt 111 until the abutting ball 112 abuts against the included angle between the inclined bottom surface 41 and the inclined side surface 51 .

[0082] S6. Start the telescopic assembly 141 until the inclined top surface 121 and the inclined bottom surface 41 are pressed against each other; during the process, the contact ball 112 is crushed under pressure.

[0083] S7. Remove debris adhering to the abutting ball 112 on the diagonal support bolt 111; rotate the diagonal support bolt 111 until it abuts against the angle between the inclined bottom surface 41 and the inclined side surface 51.

[0084] Reference Figure 14The temporary restraint system of the cable-stayed bridge includes a vertical restraint module 1 and a longitudinal restraint module 2. The vertical restraint module 1 is used to apply a downward pulling force to the steel box girder 3 through the lower crossbeam 4 and the sling 14. The pulling force is not less than the vertical component of the force from the oblique sling to the steel box girder 3, thereby preventing the steel box girder 3 from generating an upward pulling force on the support 6 (the support 6 is a columnar structure and is provided in multiple numbers, thereby achieving support for the steel box girder 3), thereby preventing the support 6 from being strained or pulled out of the base layer due to the upward pulling force, resulting in a decrease in stability. The longitudinal restraint module 2 applies a horizontal limiting force to the steel box girder 3, thereby preventing the steel box girder 3 from undergoing longitudinal displacement (i.e., along the length direction of the cable-stayed bridge), thereby avoiding the problem of bending and deformation of the top end of the support 6.

[0085] The present invention has a simple structure and reliable function. It utilizes the tension beam 11, the abutment block 12 and the connecting rod 13 to achieve connection with the bottom surface of the lower cross beam 4, which can greatly reduce the number of slings 14 and sling points required, thereby simplifying the construction steps and improving construction efficiency.

[0086] The top surface of the abutment block 12 is provided with an inclined top surface 121, which can adapt to and press the inclined bottom surface 41 of the lower beam 4, thereby avoiding the problem of slipping between the tension beam 11 / sling 14 and the inclined bottom surface 41 in traditional technology, thereby improving the structural stability of the present invention, ensuring the constraint stability of the steel box beam 3, and improving construction safety.

[0087] The inclined top surfaces 121 are connected and fixed by the connecting beams 11 and the connecting rods 13 to form a whole, further avoiding the problem in traditional technology that the connecting beams 11 / slings 14 are independently set, which makes them easy to slip and tilt with the inclined bottom surface 41.

[0088] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0089] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed or detachable connections, or integral connections; mechanical or electrical connections; direct connections or connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0090] To sum up, for those skilled in the art, according to the guidance of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, replacements and deformations made to the present invention still fall within the scope of protection of the present invention.

Claims

1. A temporary restraint system for a cable-stayed bridge, characterized by: It includes a vertical restraint module (1) and a longitudinal restraint module (2); The vertical restraint module (1) includes a connecting beam (11), abutting blocks (12), connecting rods (13) and suspension cables (14); There are two connecting beams (11) which are arranged in parallel with each other. There are four abutting blocks (12) which are arranged in pairs of two on the top surfaces of the two connecting beams (11). Two abutting blocks (12) which are located on the top surfaces of different connecting beams (11) and are oppositely arranged are fixedly connected by the connecting rods (13); The top end of the suspension cable (14) is connected to the steel box girder (3) by pulling, and the bottom end is connected to the connecting beam (11) by pulling; The top surface of the abutting block (12) is provided with an inclined top surface (121) which can be adapted to fit the inclined bottom surface (41) of the lower cross beam (4); An inclined support bolt (111) which can be screwed out obliquely upward is inserted in the connecting beam (11). The inclined support bolt (111) includes a stud and a stud head fixedly arranged at one end of the stud. Abutting ball (112) is detachably installed at the end of the stud away from the stud head; The abutting ball (112) can abut against the included angle position between the inclined bottom surface (41) of the lower cross beam (4) and the inclined side surface (51) of the side support column (5), so as to realize the lateral limit of the connecting beam (11) and the abutting block (12); The abutting ball (112) is made of brittle material; A vertical hole (113) is arranged in the connecting beam (11), and a sleeve (114) which can rotate longitudinally is arranged in the vertical hole (113); The stud is inserted into the sleeve (114), and the external thread of the stud is adapted to and screwed with the internal thread of the inner wall of the sleeve (114); The abutting ball (112) is spherical, and the end of the stud is located at the center of the ball of the abutting ball (112); A telescopic component (141) is arranged in the middle and upper part of the suspension cable (14). A first gap with a U-shaped vertical cross section is arranged between the steel box girder (3) and the lower cross beam (4), and part of the telescopic component (141) is placed in the end of the first gap; The longitudinal restraint module (2) is arranged in the first gap.

2. The temporary restraint system for a cable-stayed bridge according to claim 1, characterized in that: The longitudinal restraint module (2) includes a limiter. The limiter includes a first mounting seat (21), a second mounting seat (22) and a cross tie rod (23) which are connected in a Z shape. The two ends of the cross tie rod (23) are respectively connected to the first mounting seat (21) and the second mounting seat (22); The first mounting seat (21) is fixedly connected to the bottom surface of the steel box girder (3) by fitting, and the second mounting seat (22) is fixedly connected to the top surface of the lower cross beam (4) by fitting.

3. The temporary restraint system for a cable-stayed bridge according to claim 2, characterized in that: Two first protrusions are arranged in the middle of the top surface of the lower cross beam (4), and there are four limiters which are arranged in pairs of two on both sides of the two first protrusions.

4. The temporary restraint system for a cable-stayed bridge according to claim 3, characterized in that: The first mounting seat (21) includes a first transverse plate (211) and two first vertical plates (212) fixedly arranged on the lower surface of the first transverse plate (211); the end of the transverse tie rod (23) is inserted between the two first vertical plates (212); the end of the transverse tie rod (23) is rotatably connected to the first vertical plates (212); the upper surface of the first transverse plate (211) is attached to and fixedly connected to the bottom surface of the steel box beam (3).

5. The temporary restraint system for a cable-stayed bridge according to claim 4, characterized in that: The second mounting seat (22) includes a second transverse plate (221) and two second vertical plates (222) fixedly arranged on the upper surface of the second transverse plate (221); the end of the transverse tie rod (23) is inserted between the two second vertical plates (222); the end of the transverse tie rod (23) is rotatably connected to the second vertical plates (222); the bottom surface of the second transverse plate (221) is affixed to and fixedly connected to the top surface of the lower cross beam (4).

6. A construction method for a temporary restraint system of a cable-stayed bridge, characterized in that: The steel box girder (3) is connected by using the temporary restraint system for cable-stayed bridges according to claim 5, and the steps include: S1, connecting the steel box beam (3) and the lower cross beam (4) using the longitudinal restraint module (2); S2, connecting the tension beam (11), the abutment block (12), and the connecting rod (13); S3, using the sling (14) to suspend the tension beam (11), the abutment block (12) and the connecting rod (13) below the lower crossbeam (4); S4, starting the telescopic component (141) until the inclined top surface (121) and the inclined bottom surface (41) are adapted to fit each other; S5, rotating the diagonal support bolt (111) until the abutment ball (112) abuts against the angle between the inclined bottom surface (41) and the inclined side mold; S6, starting the telescopic assembly (141) until the inclined top surface (121) and the inclined bottom surface (41) are pressed against each other; during this process, the contact ball (112) is crushed under pressure.

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