Large-opening cast-in-place reinforced concrete V-shaped pier supporting structure
By setting horizontal tie rods in the V-shaped pier support structure, the horizontal components of the V-shaped pier's own weight are offset, solving the problem of easy cracking at the root of the V-shaped pier, and achieving safer and more economical bridge construction.
Patent Information
- Application Number
- CN202420390183.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-02-28
AI Technical Summary
When designing a bridge, when the V-pier tilt angle is large, it is easy to cause cracking at the roots of the V-pier.
A large-opening cast-in-place reinforced concrete V-shaped pier support structure is adopted, including a full hall support frame, a V-shaped pier bottom formwork, a V-shaped pier top formwork and a number of horizontal tie rods. By setting up horizontal tie rods, the horizontal components of the weight of the upper box beams and V-shaped piers transferred to the bottom I-beam cancel each other out, so that the full hall support frame mainly bears the vertical load.
It effectively solves the problem of easy cracking at the root of V-shaped piers, reduces construction costs, and improves the erection and disassembly efficiency of the formwork support system.
Smart Images
Figure CN222375196U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bridge construction, in particular to a large-opening cast-in-place reinforced concrete V-shaped pier support structure. Background Art
[0002] When designing bridges, prestressed concrete V-shaped pier continuous rigid frame bridges have more reasonable mechanical properties than continuous beam bridges and T-shaped rigid frame bridges. In addition, due to the support of the V-shaped pier, the calculated span can be effectively reduced, the bending moment of the main beam can be reduced, and the number of beam projects can be reduced. In addition, the V-shaped pier rigid frame bridge has lively lines and beautiful shapes. The construction methods currently widely used in the cast-in-place construction of V-shaped pier concrete are the bracket method and the balanced hanger method. The bracket method is to set up a full-span support frame, steel bracket, truss, etc. under the V-shaped pier to bear the vertical load and horizontal load during the casting process of the V-shaped pier. The balanced hanger method is to use steel to set up a balanced hanger on the top of the V-shaped pier cap to bear the vertical load and horizontal load during the casting process of the V-shaped pier. Both are suitable for the construction of small-angle V-shaped piers and V-shaped piers with small deadweight. When the pier body is tilted at a large angle, a large horizontal thrust will be generated during the construction of the pier body and its upper beam body, which is easy to cause cracks at the root of the V-shaped pier. Utility Model Content
[0003] In view of the deficiencies in the prior art, the utility model provides a large-opening cast-in-place reinforced concrete V-shaped pier support structure, which solves the problem that the root of the V-shaped pier is prone to cracking when the pier body is tilted at a large angle.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A large-opening cast-in-place reinforced concrete V-shaped pier support structure, comprising: a full-span support frame, a V-shaped pier bottom formwork, a V-shaped pier top formwork and a plurality of horizontal tie rods;
[0006] The full-bridge support frame is provided with a V-shaped section matching the V-shaped pier, a plurality of I-beams are arranged on the V-shaped section along the bridge direction, the V-shaped pier bottom template is laid on the I-beams, and the V-shaped pier top template is arranged inside the V-shaped pier bottom template;
[0007] A positioning hoop is welded outside the I-beam, and the positioning hoop includes a rectangular ring and a straight thread sleeve welded on one side of the rectangular ring, and both ends of the horizontal pull rod are respectively connected to the straight thread sleeve welded on one side of the rectangular ring;
[0008] A plurality of horizontal tie rods are arranged on both the front and rear sides of the V-shaped section. The horizontal tie rods include a plurality of connected steel bars, and straight threaded sleeves are also connected between the ends of the steel bars.
[0009] Furthermore, the horizontal pull rods on the same side are arranged at equal intervals from top to bottom.
[0010] Furthermore, it also includes an adjustable support, which is arranged between the full-height support frame and the I-beam, and the adjustable support is connected to the full-height support frame.
[0011] Furthermore, a plurality of common steel pipes are laid on the I-beam in the transverse direction of the bridge, and the V-shaped pier bottom formwork is laid on the common steel pipes.
[0012] Furthermore, it also includes a pile foundation cap, and the pile foundation cap is arranged below the V-shaped section.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] By setting horizontal tie rods, the deadweight of the upper box girder and V-shaped pier is transmitted to the horizontal component of the I-beam at the bottom to offset each other, so that the full-span support frame under the V-shaped pier mainly bears the vertical load, effectively solving the technical problem of easy cracking at the root of the V-shaped pier; the tie rods are assembled using multiple steel bars and straight threaded sleeves and operated in sections. The weight of a single component is small, which is convenient for on-site erection and disassembly. At the same time, it also reduces construction costs and improves the efficiency of erection and disassembly of the formwork support system.
[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 It is a schematic elevation diagram of the steel bar tie rod connection structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the steel bar tie rod connection structure of the utility model;
[0019] Figure 4 It is a schematic diagram of the structure of the steel bar positioning hoop of the utility model.
[0020] In the above drawings: 1. full-span support frame; 2. adjustable support; 3. I-beam; 4. ordinary steel pipe; 51. V-shaped pier bottom formwork; 52. V-shaped pier top formwork; 6. horizontal pull rod; 7. positioning hoop; 8. straight threaded sleeve; 9. rectangular ring; 10. pile foundation cap. DETAILED DESCRIPTION
[0021] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the technical solutions in the present invention are further described below in conjunction with the accompanying drawings and embodiments.
[0022] See also Figures 1 to 4 As shown, a large-opening cast-in-place reinforced concrete V-shaped pier support structure comprises: a full-span support frame 1, a V-shaped pier bottom formwork 51, a V-shaped pier top formwork 52 and a plurality of horizontal tie rods 6; the full-span support frame 1 is provided with a V-shaped section matching the V-shaped pier, a plurality of I-beams 3 are arranged on the V-shaped section along the bridge direction, the V-shaped pier bottom formwork 51 is laid on the I-beam 3, and the V-shaped pier top formwork 52 is arranged inside the V-shaped pier bottom formwork 51; a positioning hoop 7 is welded to the outside of the I-beam 3, the positioning hoop 7 comprises a rectangular ring 9 and a straight threaded sleeve 8 welded to one side of the rectangular ring 9, and the two ends of the horizontal tie rod 6 are respectively connected to the straight threaded sleeve 8 welded to one side of the rectangular ring 9; a plurality of horizontal tie rods 6 are arranged on both the front and rear sides of the V-shaped section, the horizontal tie rod 6 comprises a plurality of connected steel bars, and a straight threaded sleeve 8 is also connected between the ends of the steel bars.
[0023] The full-bridge support frame 1 is constructed by using a 60-type disc buckle, which is a prior art. The specific construction method and steps are not described here. A number of I-beams 3 constructed along the bridge direction form the main rib of the template. The angle of the V-shaped pier is 45°. The V-shaped pier bottom template 51 is laid on the I-beam 3, and the V-shaped pier top template 52 is arranged in the V-shaped pier bottom template 51. During pouring, horizontal layered continuous pouring is performed synchronously. A positioning hoop 7 is welded to the outside of the I-beam 3, and the I-beam 3 is arranged through the positioning hoop 7. The positioning hoop 7 includes a rectangular ring 9 and a straight threaded sleeve 8 welded to one side of the rectangular ring 9. The rectangular ring 9 is made of round steel, and the head and tail ends of the round steel are welded. A positioning hoop 7 is provided to fix the two ends of the horizontal tie rod 6, that is, the two ends of the horizontal tie rod 6 are respectively fixed to the two ends of the V-shaped pier, so that the horizontal component forces generated offset each other, so that the full-bridge support frame under the V-shaped pier mainly bears the vertical load, effectively solving the technical problem of easy cracking at the root of the V-shaped pier.
[0024] Specifically, each of the horizontal tie rods 6 includes a number of connected steel bars, and a straight threaded sleeve 8 is also connected between the ends of the steel bars. The steel bars are HRB400 steel bars, and the steel bars are connected by straight threaded sleeves 8. There is no need to add new equipment, and workers can perform routine operations. The quality of processing and on-site installation is easy to control. The horizontal tie rods 6 are connected in sections with a number of steel bars and are mechanically connected with straight threads. The weight of a single component is small, and there is no need to use large-scale lifting equipment. It is convenient to assemble and disassemble, and the safety factor is high. In addition, the horizontal tie rods 6, straight threaded sleeves 8 and positioning hoops 7 can all be processed and manufactured during the construction of the V-shaped pier foundation. The weight of a single component of the horizontal tie rod 6 is small, and workers can easily operate it, which can increase the erection speed of the support frame system and shorten the erection period of the support frame system. The horizontal tie rods 6 and straight threaded sleeves 8 can both be used for subsequent reinforced concrete structures to reduce material consumption and reduce engineering costs.
[0025] Furthermore, if Figure 1As shown, the horizontal pull rods 6 on the same side are arranged at equal intervals from top to bottom, with an interval of 1 m.
[0026] Furthermore, if Figure 1 As shown, in order to support the I-beam 3, an adjustable support 2 is also included. The adjustable support 2 is arranged between the full-height support frame 1 and the I-beam 3, and the adjustable support 2 is connected to the full-height support frame 1.
[0027] Furthermore, if Figure 1 As shown, a plurality of common steel pipes 4 are laid on the I-beam 3 in the transverse direction, the plurality of common steel pipes 4 form a secondary ridge of the template, and the V-shaped pier bottom template 51 is laid on the common steel pipes 4 .
[0028] Furthermore, if Figure 1 As shown, it also includes a pile foundation cap 10, which is arranged below the V-shaped section and is used to support the V-shaped pier.
[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A large-opening cast-in-place reinforced concrete V-shaped pier support structure, characterized in that: include: A full support frame (1), a V-shaped pier bottom template (51), a V-shaped pier top template (52) and a plurality of horizontal tie rods (6); The full-bridge support frame (1) is provided with a V-shaped section matching the V-shaped pier, a plurality of I-beams (3) are arranged on the V-shaped section along the bridge direction, the V-shaped pier bottom template (51) is laid on the I-beams (3), and the V-shaped pier top template (52) is arranged inside the V-shaped pier bottom template (51); The I-beam (3) is welded with a positioning hoop (7) on the outside, and the positioning hoop (7) includes a rectangular ring (9) and a straight thread sleeve (8) welded to one side of the rectangular ring (9), and the two ends of the horizontal pull rod (6) are respectively connected to the straight thread sleeve (8) welded to one side of the rectangular ring (9); A plurality of horizontal tie rods (6) are arranged on both the front and rear sides of the V-shaped section. The horizontal tie rods (6) include a plurality of connected steel bars, and straight threaded sleeves (8) are also connected between the ends of the steel bars.
2. A large-opening cast-in-place reinforced concrete V-shaped pier support structure as claimed in claim 1, characterized in that: The horizontal pull rods (6) located on the same side are arranged at equal intervals from top to bottom.
3. A large-opening cast-in-place reinforced concrete V-shaped pier support structure as claimed in claim 1, characterized in that: It also comprises an adjustable support (2), wherein the adjustable support (2) is arranged between the full-height support frame (1) and the I-beam (3), and the adjustable support (2) is connected to the full-height support frame (1).
4. A large-opening cast-in-place reinforced concrete V-shaped pier support structure as claimed in claim 1, characterized in that: A plurality of common steel pipes (4) are laid on the I-beam (3) in the transverse direction of the bridge, and the V-shaped pier bottom formwork (51) is laid on the common steel pipes (4).
5. A large-opening cast-in-place reinforced concrete V-shaped pier support structure as claimed in claim 1, characterized in that: It also comprises a pile foundation cap (10), wherein the pile foundation cap (10) is arranged below the V-shaped section.