A deformation coordination device and method for an I-beam pedestal using a fold line pretensioning method

Abstract

The present invention provides a deformation coordination device and method for an I-beam pedestal of a broken line pre-tensioning method, and belongs to the technical field of prestressed tensioning of prefabricated beams and slabs in bridge construction. The technical scheme is as follows: it includes a beam-making base, a plurality of steel pipe piles are arranged at the lower part of the beam-making base, and a stress beam is arranged at the upper part of the beam-making base; a tensioning pedestal is arranged on one side of the beam-making base, and the tensioning pedestal includes pull-out piles and pressure-bearing piles composed of steel pipe piles, and the pull-out piles and pressure-bearing piles are provided with horizontal rods and vertical rods through a sliding system and a rotating system; a secondary rod parallel to the vertical rod is arranged above the beam-making base, and the secondary rod and the vertical rod are connected by a plurality of tension rods, and a through-hole jack is arranged after the tension rod passes through the vertical rod, and the stress beam is anchored on the secondary rod through a single-hole anchor. The beneficial effects of the present invention are as follows: the sliding system makes the design of the beam-making pedestal less demanding on the foundation treatment; the coordinated arrangement of the rotation system and the sliding system of the tensioning pedestal can eliminate the influence of the expansion and contraction creep of the base on the tensioning end.

Description

Technical Field

[0001] The invention relates to the technical field of prestressed tensioning of prefabricated beams and slabs in bridge construction, and in particular to a deformation coordination device and method for an I-beam pedestal using a broken line pre-tensioning method. Background Art

[0002] Pre-tensioned precast beams have developed rapidly in bridge construction and have obvious advantages over post-tensioned precast beams. Traditional pre-tensioned construction has relative limitations and also has certain defects; the different ways of transmitting the tensioning force of the tensioning pedestal are destructive to the tensioning pedestal structure.

[0003] In the current construction, there are not many methods for prestressing precast beams, mainly from prestressed straight line tensioning and broken line tensioning to build relatively suitable tensioning pedestals. The construction of precast hollow slab beams by linear prestressing prestressing adopts traditional gravity pedestals. The gravity pedestal is simple in form, the force direction is simple and clear, and the construction method has been used for many years, and the technology is relatively mature. During the entire pedestal tensioning process, the tensioning force is transmitted to the concrete at the bottom of the pedestal, forming a local eccentric pressure, which maintains the stability of the entire tensioning pedestal relative to the soil pressure. The construction of the prestressed gravity pedestal is suitable for good foundation sections, and the geological conditions are the key to determining the construction cost of the pedestal. In short, if it is in a soft soil foundation section, due to the poor geology, the soil pressure approaches infinitesimal, and even if the pedestal construction uses a larger volume of concrete, it cannot meet the beam field construction conditions. During the entire gravity pedestal force process, the eccentric load at the bottom of the pedestal has great shearing properties on the local concrete of the pedestal, and the concrete structure has weak shear resistance, which is easy to form shear damage under long-term action. When considering the long-term tension force, the tensioning pedestal will be displaced and tilted. In addition, the construction of the gravity pedestal has great limitations, high cost, obvious advantages and disadvantages, and its technical nature is relatively backward.

[0004] Therefore, in order to solve the problems of local eccentricity and large shear destructiveness in the design and use of the precast beam pedestal constructed by the above-mentioned prestressing method, and considering the large limitations of the application and construction of gravity pedestals, a method for deformation coordination of a broken line prestressing I-beam pedestal is provided, which can promote and be applied to the design and development of new pedestals. Summary of the invention

[0005] The purpose of the present invention is to provide a deformation coordination device and method for a fold line prestressing I-beam pedestal, which is simple to operate and effectively solves the problems of local eccentricity and large shear destructiveness that may occur in the design and use of the original prestressing method prefabricated beam pedestal.

[0006] The present invention is achieved by the following measures:

[0007] A deformation coordination device and method for an I-beam pedestal of a fold line pre-tensioning method, characterized in that it comprises a beam-making base, a plurality of steel pipe piles are arranged at the lower part of the beam-making base through a sliding system, and a stress beam is arranged at the upper part of the beam-making base;

[0008] A tensioning pedestal is provided on one side of the beam-making base, and the tensioning pedestal includes anti-pulling piles and pressure-bearing piles formed by the steel pipe piles, and the anti-pulling piles and the pressure-bearing piles are provided with horizontal rods and vertical rods through the sliding system and the rotating system;

[0009] A secondary rod parallel to the vertical rod is arranged above the beam making base, the secondary rod and the vertical rod are connected by a plurality of tie rods, a through-hole jack is arranged after the tie rod passes through the vertical rod, and the stress beam is anchored on the secondary rod by a single-hole anchor.

[0010] The specific features of the present invention also include:

[0011] The sliding system includes an anti-pulling pile sliding bearing, a pressure-bearing pile sliding bearing and a beam-making base sliding bearing;

[0012] The anti-pullout pile sliding support includes a steel plate cross brace arranged inside the upper end of the anti-pullout pile, a reserved hole is arranged in the middle of the steel plate cross brace, an H-shaped transverse distribution beam is arranged above the anti-pullout pile, the transverse distribution beam is used to transmit and distribute the tension exerted on the anchor, and the lower part is connected to the horizontal rod through a slide, and a fine-rolled straight threaded steel bar is arranged through the transverse distribution beam, and an anchor is arranged on the upper end of the fine-rolled straight threaded steel bar, and the anchor is used to anchor the fine-rolled straight threaded steel bar, and a gasket is arranged on the periphery of the fine-rolled straight threaded steel bar between the anchor and the transverse distribution beam, and the gasket cooperates with the anchor to anchor the fine-rolled straight threaded steel bar , diffuse the local pressure at the bottom of the anchor, a pair of the horizontal rods are arranged between the transverse distribution beam and the pull-out pile, and the pull-out pile sliding support is arranged on the upper part of the pull-out pile on the rear side of the horizontal rod, and has two functions. On the one hand, it can connect the pull-out pile and the horizontal rod; on the other hand, it can make the pull-out pile and the horizontal rod produce a relative sliding tendency, which can completely eliminate the influence of the horizontal shear force on the pull-out pile. A U-shaped anchor is arranged after the lower end of the fine-rolled straight threaded steel bar passes through the reserved hole, and the U-shaped anchor is used to anchor the fine-rolled straight threaded steel bar, and at the same time can make it have a certain angular displacement.

[0013] A pair of arc-shaped slides A are arranged on the lower side of the transverse distribution beam, a pair of arc-shaped slides B corresponding to the slides A are arranged on the upper end of the anti-pullout pile, and the horizontal rods are respectively slidably arranged between the slides A and the slides B on both sides, and the horizontal rods can slide relatively with respect to the transverse distribution beam and the anti-pullout pile.

[0014] The pressure-bearing pile sliding bearing includes a steel plate B arranged at the upper end of the pressure-bearing pile, the steel plate B is used for filling concrete bottom sealing, the upper part of the steel plate B is provided with filling concrete, the filling concrete is used as a local reinforcement of the pressure-bearing pile, the height of the filling concrete is 50 cm, the upper part of the filling concrete is provided with a steel plate A, the steel plate A is used for capping the filling concrete, and also serves as the bottom support of the polytetrafluoroethylene sliding rubber bearing, the distance between the steel plate A and the top of the pressure-bearing pile is 3 cm, the upper part of the steel plate A is provided with a polytetrafluoroethylene sliding rubber bearing, the vertical rod is arranged on the polytetrafluoroethylene sliding rubber bearing, the polytetrafluoroethylene sliding rubber bearing can cause relative sliding between the vertical rod and the pressure-bearing pile, and a filling wooden wedge is arranged in the gap between the lower part of the polytetrafluoroethylene sliding rubber bearing and the pressure-bearing pile, the filling wooden wedge can make the polytetrafluoroethylene sliding rubber bearing always located at the center of the pressure-bearing pile;

[0015] The bearing pile sliding support adopts the polytetrafluoroethylene sliding rubber support. When installed, the lower part of the support is embedded in the bearing pile and located at the center of the cross section of the bearing pile. The empty space around the bearing pile (steel pipe pile) is filled and fixed with wooden wedges. The device also has two functions. On the one hand, it is used to transmit the vertical force of the upper pedestal vertical rod and transmit the vertical force to the bearing pile; on the other hand, it can cause a relative sliding trend between the bearing pile and the vertical rod, which can completely eliminate the influence of the horizontal shear force on the bearing pile.

[0016] The beam-making base sliding support includes a plurality of hoops corresponding to the steel pipe piles and arranged on the periphery of the beam-making base, the hoops include two upper and lower U-shaped hoops plates, both sides of the hoops plates are provided with anchoring connection plates, and the hoops plates on the same side are anchored by fastening bolts to connect the upper and lower hoops plates;

[0017] A lanyard is provided between the anchoring connection plates on both sides and the steel pipe piles below, and the lanyard is used to connect the clamp and the steel pipe piles at the bottom, so that horizontal relative sliding occurs between the two.

[0018] The beam-making base sliding support is arranged between the beam-making base and the ground anchor (steel pipe pile). The main purpose is to solve the problem of horizontal relative displacement of the ground anchor caused by temperature deformation and compression deformation of the beam-making base during production. The device uses the clamp and the tie rope to ensure that there is a certain amount of relative horizontal displacement space between the beam-making base and the ground anchor.

[0019] The rotation system includes an arc-shaped steering flange and a spherical fixed support;

[0020] The arc-shaped steering flange is provided at the ends of a pair of horizontal rods away from the sliding system, and a connecting plate 1 is provided on both the upper and lower sides of the arc-shaped steering flange. A side of the vertical rod facing the sliding system is provided with an arc-shaped steel box matched with the arc-shaped steering flange, and a connecting plate 2 matched with the connecting plate 1 is provided on both the upper and lower sides of the arc-shaped steel box. A plurality of mounting holes are provided on the connecting plate 1 and the connecting plate 2, and nuts and bolts are provided through the mounting holes for connection, and the specification model of the bolts is M24;

[0021] The arc-shaped steering flange is arranged between the horizontal rod and the vertical rod. On the one hand, it can connect the horizontal rod and the vertical rod so that the horizontal axial force can be transmitted between the two rods. On the other hand, it can cause a certain amount of relative angular displacement between the vertical rod and the horizontal rod, which can eliminate the influence of a large bending moment at the connection between the two rods. In order to reduce the relative angular displacement of the vertical rod and the vertical direction during use, the vertical rod can be set with a pre-biased angular displacement (to the left), which can also reduce the relative angular position between the vertical rod and the horizontal rod.

[0022] The spherical fixed support is arranged at the connection between the vertical rod and the beam-making base. The support works together with the arc-shaped steering flange to allow the vertical rod to rotate relatively in a plane. When the vertical rod rotates at an angle, the horizontal force can still be transmitted to the beam-making base along the spherical fixed support, thereby solving the problem of horizontal force transmission of the tensioning system.

[0023] A rubber pad is arranged around the bolt between the first connecting plate and the second connecting plate.

[0024] The outer periphery of the bolt between the second connecting plate and the rubber pad is provided with a II-type elastic strip, which plays an elastic expansion and contraction deformation role together with the rubber pad;

[0025] A polytetrafluoroethylene rubber sliding sheet is arranged between the arc-shaped steering flange and the arc-shaped steel box, and the polytetrafluoroethylene rubber sliding sheet enables the arc-shaped steering flange and the arc-shaped steel box to rotate relative to each other;

[0026] The diameter of the mounting hole is larger than the diameter of the bolt, so that the arc-shaped steering flange and the arc-shaped steel box can further rotate relative to each other.

[0027] A plurality of pull ropes are provided between one end of the horizontal rod close to the anti-pulling pile and the vertical rod.

[0028] The construction method is:

[0029] S1. Design the size of the tensioning pedestal according to the site requirements, and drive piles into the predetermined position in advance according to the tensioning pedestal design drawing and the beam base layout drawing described on site;

[0030] S2. Prefabricate in the factory according to the tensioning pedestal design drawing and assemble and install on site.

[0031] S3. Install the sliding system and the rotating system according to the design, and after installation, set the pre-bias value and test tensioning (tensioning is performed through the through-hole jack).

[0032] S4. After the construction is completed, all parts of the equipment are safely dismantled and recycled for reuse.

[0033] The present invention provides a deformation coordination device and method for a fold line pre-tensioned I-beam pedestal, aiming to solve the problems of local eccentricity and large shear destructiveness in the design and use of the original pre-tensioned precast beam pedestal, while also being able to better improve the construction limitations of the gravity tensioning pedestal. The method of the present invention can be divided into two major parts: a sliding system and a rotating system. The sliding system can comprehensively solve the problem of large shear destructiveness of the original pre-tensioned precast beam pedestal, while the rotating system can, to a certain extent, better solve the problem of local eccentricity in the design and use of the pre-tensioned precast beam pedestal. The combination of the two can achieve deformation coordination of the pre-tensioned I-beam pedestal, which will comprehensively promote the development and application of the pre-tensioned precast beam pedestal.

[0034] The beneficial effects of the present invention are:

[0035] The present invention provides a deformation coordination device and method for an I-beam pedestal using a fold line pre-tensioning method, which can effectively solve the problems of local eccentricity and large shear destructiveness that may occur in the design and use of the original prefabricated beam pedestal constructed using the pre-tensioning method. The specific beneficial effects are as follows: the sliding system makes the design of the beam-making pedestal less demanding on foundation treatment, and the foundation only bears the gravity of the entire pedestal and the vertical tension of the anchor on the foundation, without horizontal shear force; the coordinated arrangement of the tensioning pedestal rotation system and the sliding system can eliminate the influence of the expansion and contraction creep of the base on the tensioning end, and the tensioning force of the entire tensioning pedestal is converted into the axial pressure of the foundation base and the slider, so that the pedestal construction is simple, the construction period is shortened, and the material consumption is reduced.

[0036] In addition, all components and accessories involved in this patent can be recycled repeatedly, and multiple recycling of components can effectively improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0038] Figure 2 for Figure 1 Structural diagram of the middle AA section.

[0039] Figure 3 for Figure 1 Middle BB section structural diagram.

[0040] Figure 4 It is an elevation view (left) and a cross-sectional structural view (right) of the beam-making base sliding support in an embodiment of the present invention.

[0041] Figure 5 It is a schematic structural diagram of the arc-shaped steering flange and other related components in an embodiment of the present invention.

[0042] The accompanying drawings are marked as follows: 1. Anti-pulling pile sliding bearing; 2. Pressure pile sliding bearing; 3. Beam base sliding bearing; 4. Arc-shaped steering flange; 5. Spherical fixed bearing; 6. Gasket; 7. Transverse distribution beam; 8. Slide A; 9. Slide B; 10. U-shaped anchor; 11. Reserved hole; 12. Steel plate cross brace; 13. Steel plate A; 14. Filling concrete; 15. Polytetrafluoroethylene sliding rubber bearing; 16. Filling wooden wedge; 17. Steel plate B; 18. Beam base; 1 9. Clamp; 20. Anchor connecting plate; 21. Fastening bolt; 22. Mooring rope; 23. Anchor; 24. High-precision rolled straight threaded steel bar; 25. Type II spring bar; 26. Rubber pad; 27. Bolt; 28. Arc steel box; 29. ​​Polytetrafluoroethylene rubber slide; 30. Connecting plate 2; 31. Connecting plate 1; 101. Vertical rod; 102. Pull rod; 103. Auxiliary rod; 104. Stress beam; 105. Pull-out pile; 106. Compression pile; 107. Steel pipe pile; 108. Horizontal rod. DETAILED DESCRIPTION

[0043] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0044] See also Figure 1-5 , a deformation coordination device and method for a pedestal of an I-beam of a fold line pre-tensioning method, comprising a beam-making base 18, a plurality of steel pipe piles 107 are arranged at the lower part of the beam-making base 18 through a sliding system, and a stress beam 104 is arranged at the upper part of the beam-making base 18;

[0045] A tensioning pedestal is provided on one side of the beam making base 18, and the tensioning pedestal includes an anti-pulling pile 105 and a pressure-bearing pile 106 composed of a steel pipe pile 107, and the anti-pulling pile 105 and the pressure-bearing pile 106 are provided with a horizontal rod 108 and a vertical rod 101 through a sliding system and a rotating system;

[0046] A secondary rod 103 parallel to the vertical rod 101 is arranged above the beam making base 18. The secondary rod 103 and the vertical rod 101 are connected by a plurality of tie rods 102. After the tie rod 102 passes through the vertical rod 101, a through-hole jack is arranged. The stress beam 104 is anchored on the secondary rod 103 by a single-hole anchor.

[0047] The sliding system includes an anti-pulling pile sliding bearing 1, a pressure-bearing pile sliding bearing 2 and a beam-making base sliding bearing 3;

[0048] The pull-out pile sliding support 1 includes a steel plate cross brace 12 arranged inside the upper end of the pull-out pile 105, a reserved hole 11 is arranged in the middle of the steel plate cross brace 12, an H-shaped transverse distribution beam 7 is arranged above the pull-out pile 105, the transverse distribution beam 7 is used to transmit the tension of the distribution anchor 23, and the lower part is connected to the horizontal rod 108 through a slide, and a fine-rolled straight threaded steel bar 24 is arranged through the transverse distribution beam 7, and an anchor 23 is arranged on the upper end of the fine-rolled straight threaded steel bar 24, and the anchor 23 is used to anchor the fine-rolled straight threaded steel bar 24, and a gasket 6 is arranged on the periphery of the fine-rolled straight threaded steel bar 24 between the anchor 23 and the transverse distribution beam 7, and the gasket 6 cooperates with the anchor 23 to anchor the fine-rolled straight threaded steel bar 24 , diffuse the local pressure at the bottom of the anchor 23, a pair of horizontal rods 108 are arranged between the transverse distribution beam 7 and the pull-out pile 105, and the pull-out pile sliding support 1 is arranged on the upper part of the pull-out pile 105 on the rear side of the horizontal rod 108, which has two functions. On the one hand, it can connect the pull-out pile 105 with the horizontal rod 108; on the other hand, it can make the pull-out pile 105 and the horizontal rod 108 produce a relative sliding trend, which can completely eliminate the influence of the horizontal shear force on the pull-out pile 105. After the lower end of the fine-rolled straight threaded steel bar 24 passes through the reserved hole 11, a U-shaped anchor 10 is arranged, and the U-shaped anchor 10 is used to anchor the fine-rolled straight threaded steel bar 24, and at the same time, it can make it have a certain angular displacement.

[0049] A pair of arc-shaped slides A8 are arranged on the lower side of the transverse distribution beam 7, and a pair of arc-shaped slides B9 corresponding to the slides A8 are arranged on the upper end of the pull-out pile 105. Horizontal rods 108 are respectively slidably arranged between the slides A8 and the slides B9 on both sides, and the horizontal rods 108 can slide relatively to the transverse distribution beam 7 and the pull-out pile 105.

[0050] The pressure pile sliding bearing 2 includes a steel plate B17 arranged on the upper end of the pressure pile 106, the steel plate B17 is used to fill the concrete 14 to seal the bottom, the steel plate B17 is provided with filling concrete 14 on the upper part, the filling concrete 14 is used as a local reinforcement of the pressure pile 106, the filling concrete 14 is 50cm high, and the steel plate A13 is arranged on the upper part of the filling concrete 14, the steel plate A13 is used to seal the top of the filling concrete 14, and also serves as the bottom support of the polytetrafluoroethylene sliding rubber bearing 15, the steel plate A13 and the pressure pile 106 are connected. 6 The top spacing is 3 cm. A polytetrafluoroethylene sliding rubber bearing 15 is arranged on the upper part of the steel plate A13. A vertical rod 101 is arranged on the polytetrafluoroethylene sliding rubber bearing 15. The polytetrafluoroethylene sliding rubber bearing 15 can make the vertical rod 101 and the pressure pile 106 slide relative to each other. A filling wooden wedge 16 is arranged in the gap between the lower part of the polytetrafluoroethylene sliding rubber bearing 15 and the pressure pile 106. The filling wooden wedge 16 can make the polytetrafluoroethylene sliding rubber bearing 15 always located at the center of the pressure pile 106.

[0051] The bearing pile sliding support 2 adopts a polytetrafluoroethylene sliding rubber support 15. When installed, the lower part of the support is embedded in the bearing pile 106 and is located at the center of the cross section of the bearing pile 106. The gap between the surrounding and the bearing pile 106 (steel pipe pile 107) is filled and fixed with wooden wedges. The device also has two functions. On the one hand, it is used to transmit the vertical force of the upper pedestal vertical rod 101 and transmit the vertical force to the bearing pile 106; on the other hand, it can cause a relative sliding trend between the bearing pile 106 and the vertical rod 101, which can completely eliminate the influence of the horizontal shear force on the bearing pile 106.

[0052] The beam base sliding support 3 includes a plurality of hoops 19 corresponding to the steel pipe piles 107 and arranged on the periphery of the beam base 18. The hoops 19 include two upper and lower U-shaped hoop plates. Anchor connecting plates 20 are arranged on both sides of the hoop plates. The hoop plates on the same side are anchored by fastening bolts 21 to connect the upper and lower hoop plates.

[0053] A lanyard 22 is provided between the anchoring connecting plates 20 on both sides and the steel pipe pile 107 below. The lanyard 22 is used to connect the clamp 19 and the lower steel pipe pile 107, so that the horizontal relative sliding occurs between the two.

[0054] The beam-making base sliding support 3 is arranged between the beam-making base 18 and the ground anchor (steel pipe pile 107). The main purpose is to solve the problem of horizontal relative displacement of the ground anchor caused by temperature deformation and compression deformation of the beam-making base 18 during the use and production process. The device uses the clamp 19 and the tie rope 22 to ensure that there is a certain amount of relative horizontal displacement space between the beam-making base 18 and the ground anchor.

[0055] The rotation system includes an arc-shaped steering flange 4 and a spherical fixed support 5;

[0056] A pair of horizontal rods 108 away from the sliding system are provided with arc-shaped steering flanges 4 at their ends, and connecting plates 1 31 are provided on both the upper and lower sides of the arc-shaped steering flanges 4. A side of the vertical rod 101 facing the sliding system is provided with an arc-shaped steel box 28 matched with the arc-shaped steering flanges 4, and connecting plates 2 30 matched with connecting plates 1 31 are provided on both the upper and lower sides of the arc-shaped steel box 28. A plurality of mounting holes are provided on the connecting plates 1 31 and 2 30, and nuts and bolts 27 are provided through the mounting holes for connection, and the specification model of the bolts 27 is M24;

[0057] The arc-shaped steering flange 4 is disposed between the horizontal rod 108 and the vertical rod 101. On the one hand, it can connect the horizontal rod 108 and the vertical rod 101, so that the horizontal axial force is transmitted between the two; on the other hand, it can cause a certain amount of relative angular displacement between the vertical rod 101 and the horizontal rod 108, which can eliminate the influence of a large bending moment at the connection between the two. In order to reduce the relative angular displacement of the vertical rod 101 and the vertical direction during use, the vertical rod 101 can be set with a pre-biased angular displacement (to the left), which can also reduce the relative angular position between the vertical rod 101 and the horizontal rod 108;

[0058] The spherical fixed support 5 is arranged at the connection between the vertical rod 101 and the beam-making base 18. The support works together with the arc-shaped steering flange 4 to allow the vertical rod 101 to rotate relatively in the plane; when the vertical rod 101 rotates at an angle, the horizontal force can still be transmitted along the spherical fixed support 5 to the beam-making base 18, solving the problem of horizontal force transmission of the tensioning system.

[0059] A rubber pad 26 is disposed around the bolt 27 between the first connecting plate 31 and the second connecting plate 30 .

[0060] The outer periphery of the bolt between the connecting plate 2 30 and the rubber pad 26 is provided with a II-type elastic bar 25, which plays an elastic expansion and contraction deformation role together with the rubber pad 26;

[0061] A polytetrafluoroethylene rubber slide 29 is provided between the arc-shaped steering flange 4 and the arc-shaped steel box 28, and the polytetrafluoroethylene rubber slide 29 enables the arc-shaped steering flange 4 and the arc-shaped steel box 28 to rotate relative to each other;

[0062] The diameter of the mounting hole is larger than the diameter of the bolt 27 , so that the arc-shaped steering flange 4 and the arc-shaped steel box 28 can further rotate relative to each other.

[0063] A plurality of pull ropes are provided between one end of the horizontal rod 108 close to the anti-pulling pile 105 and the vertical rod 101 .

[0064] The construction method is:

[0065] S1. Design the size of the tensioning pedestal according to the site requirements, and drive the piles into the predetermined position in advance according to the tensioning pedestal design drawing and the on-site beam base 18 layout drawing;

[0066] S2. Prefabricate in the factory according to the tensioning pedestal design drawing and assemble and install on site.

[0067] S3. Install the sliding system and the rotating system according to the design. After installation, set the pre-bias value and conduct test tensioning (tensioning through the through-hole jack).

[0068] S4. After the construction is completed, all parts of the equipment are safely dismantled and recycled for reuse.

[0069] The present invention provides a deformation coordination device and method for a fold line pre-tensioned I-beam pedestal, aiming to solve the problems of local eccentricity and large shear destructiveness in the design and use of the original pre-tensioned precast beam pedestal, while also being able to better improve the construction limitations of the gravity tensioning pedestal. The method of the present invention can be divided into two major parts: a sliding system and a rotating system. The sliding system can comprehensively solve the problem of large shear destructiveness of the original pre-tensioned precast beam pedestal, while the rotating system can, to a certain extent, better solve the problem of local eccentricity in the design and use of the pre-tensioned precast beam pedestal. The combination of the two can achieve deformation coordination of the pre-tensioned I-beam pedestal, which will comprehensively promote the development and application of the pre-tensioned precast beam pedestal.

[0070] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A deformation coordination device for an I-beam pedestal of a fold line pre-tensioning method, characterized in that: It comprises a beam-making base (18), a plurality of steel pipe piles (107) are arranged at the lower part of the beam-making base (18) through a sliding system, and a stress beam (104) is arranged at the upper part of the beam-making base (18); A tensioning pedestal is provided on one side of the beam-making base (18), and the tensioning pedestal includes an anti-pulling pile (105) and a pressure-bearing pile (106) formed by the steel pipe pile (107), and the anti-pulling pile (105) and the pressure-bearing pile (106) are provided with a horizontal rod (108) and a vertical rod (101) through the sliding system and the rotating system; A secondary rod (103) parallel to the vertical rod (101) is arranged above the beam-making base (18); the secondary rod (103) and the vertical rod (101) are connected via a plurality of tie rods (102); a through-hole jack is arranged after the tie rod (102) passes through the vertical rod (101); the stress beam (104) is anchored on the secondary rod (103) via a single-hole anchor; The sliding system comprises an anti-pulling pile sliding support (1), a pressure-bearing pile sliding support (2) and a beam-making base sliding support (3); The anti-pulling pile sliding support (1) comprises a steel plate cross brace (12) arranged inside the upper end of the anti-pulling pile (105), a reserved hole (11) is arranged in the middle of the steel plate cross brace (12), an H-shaped transverse distribution beam (7) is arranged above the anti-pulling pile (105), a fine-rolled straight threaded steel bar (24) is arranged through the transverse distribution beam (7), an anchor (23) is arranged at the upper end of the fine-rolled straight threaded steel bar (24), a gasket (6) is arranged on the periphery of the fine-rolled straight threaded steel bar (24) between the anchor (23) and the transverse distribution beam (7), a pair of horizontal rods (108) are arranged between the transverse distribution beam (7) and the anti-pulling pile (105), and a U-shaped anchor (10) is arranged at the lower end of the fine-rolled straight threaded steel bar (24) after passing through the reserved hole (11); The rotation system comprises an arc-shaped steering flange (4) and a spherical fixed support (5); The arc-shaped steering flange (4) is arranged at the end of a pair of horizontal rods (108) away from the sliding system, and the upper and lower sides of the arc-shaped steering flange (4) are both provided with a connecting plate 1 (31). The side of the vertical rod (101) facing the sliding system is provided with an arc-shaped steel box (28) matched with the arc-shaped steering flange (4), and the upper and lower sides of the arc-shaped steel box (28) are both provided with a connecting plate 2 (30) matched with the connecting plate 1 (31), and a plurality of mounting holes are arranged on the connecting plate 1 (31) and the connecting plate 2 (30), and nuts and bolts (27) are arranged through the mounting holes for connection.

2. The deformation coordination device for the pedestal of an I-beam using the fold line pretensioning method according to claim 1 is characterized in that: A pair of arc-shaped slides A (8) are arranged on the lower side of the transverse distribution beam (7), a pair of arc-shaped slides B (9) corresponding to the slides A (8) are arranged on the upper end of the anti-pulling pile (105), and the horizontal rods (108) are slidably arranged between the slides A (8) and the slides B (9) on both sides.

3. The deformation coordination device for the pedestal of an I-beam using the fold line pretensioning method according to claim 1 is characterized in that: The pressure-bearing pile sliding support (2) comprises a steel plate B (17) arranged at the upper end of the pressure-bearing pile (106), a filling concrete (14) is arranged on the upper part of the steel plate B (17), a steel plate A (13) is arranged on the upper part of the filling concrete (14), a polytetrafluoroethylene sliding rubber support (15) is arranged on the upper part of the steel plate A (13), the vertical rod (101) is arranged on the polytetrafluoroethylene sliding rubber support (15), and a filling wooden wedge (16) is arranged in the gap between the lower part of the polytetrafluoroethylene sliding rubber support (15) and the pressure-bearing pile (106).

4. The deformation coordination device for the pedestal of an I-beam using the fold line pretensioning method according to claim 1 is characterized in that: The beam-making base sliding support (3) comprises a plurality of hoops (19) corresponding to the steel pipe piles (107) and arranged on the periphery of the beam-making base (18), the hoops (19) comprising two upper and lower U-shaped hoop plates, both sides of the hoop plates being provided with anchoring connection plates (20), and the hoop plates on the same side being anchored by fastening bolts (21); Tie ropes (22) are provided between the anchoring connection plates (20) on both sides and the steel pipe piles (107) below.

5. The deformation coordination device for the pedestal of an I-beam using the fold line pre-tensioning method according to claim 1 is characterized in that: A rubber pad (26) is arranged on the periphery of the bolt (27) between the first connecting plate (31) and the second connecting plate (30).

6. The deformation coordination device for the pedestal of an I-beam using the fold line pretensioning method according to claim 5 is characterized in that: A type II elastic strip (25) is arranged on the periphery of the bolt between the second connecting plate (30) and the rubber pad (26); A polytetrafluoroethylene rubber sliding sheet (29) is provided between the arc-shaped steering flange (4) and the arc-shaped steel box (28); The diameter of the mounting hole is greater than the diameter of the bolt (27).

7. The deformation coordination device for the pedestal of an I-beam using the fold line pretensioning method according to claim 1 is characterized in that: A plurality of pull ropes are provided between one end of the horizontal rod (108) close to the anti-pulling pile (105) and the vertical rod (101) for connection.

8. The method of the I-beam pedestal deformation coordination device according to claim 1, characterized in that: S1. Design the size of the tensioning pedestal according to the site requirements, according to the tensioning pedestal design drawing and the site beam base (18) layout diagram, and drive the piles into the predetermined position in advance; S2. Prefabricate the pedestal in the factory according to the design drawing and assemble and install it on site; S3. Install the sliding system and the rotating system according to the design, and set the pre-bias value and test the tension after installation; S4. After the construction is completed, all parts of the equipment are safely dismantled and recycled for reuse.

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