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CN-116607412-B - Arch bridge buckling cable ground tensioning and anchoring system and method

CN116607412BCN 116607412 BCN116607412 BCN 116607412BCN-116607412-B

Abstract

The invention relates to an arch bridge buckling cable ground tensioning and anchoring system and a method, wherein the system comprises a ground anchor, a tensioning and anchoring beam, a sliding component and a limiting component, the tensioning anchor beam is connected with the ground anchor in a sliding manner through the sliding assembly, the limiting assembly is connected with the ground anchor and the tensioning anchor beam, and the limiting assembly is used for limiting the maximum sliding position of the tensioning anchor beam. The reaction force of the shearing force applied to the buckling rope in the tensioning process forces the tensioning anchoring beam to slide along the sliding component, namely the setting angle of the tensioning anchoring beam is adjusted in a self-adaptive manner along with the buckling rope, so that the buckling rope is vertical to the anchoring end, the maximum sliding position of the tensioning anchoring beam is limited only by the axial force, the tensioning anchoring beam is effectively connected with the ground anchor, the failure of a tensioning anchoring system is avoided, a special tensioning anchoring system is not required to be manufactured independently, the tensioning anchoring beam, the sliding component and the limiting component can be recycled, the general rate and the material utilization rate are improved, the construction difficulty is simplified, and the construction quality can be guaranteed.

Inventors

  • QIN DAYAN
  • HAN YU
  • LUO XIAOBIN
  • TANG RUIKAI
  • GAO FENG
  • HUANG YOU
  • ZHENG JIAN

Assignees

  • 广西路桥工程集团有限公司

Dates

Publication Date
20260505
Application Date
20230621

Claims (7)

  1. 1. The arch bridge buckling cable ground tensioning and anchoring system is characterized by comprising a ground anchor (1), a tensioning and anchoring beam (3), a sliding component and a limiting component, wherein the tensioning and anchoring beam (3) is connected with the ground anchor (1) in a sliding mode through the sliding component, the limiting component is connected with the ground anchor (1) and the tensioning and anchoring beam (3), and the limiting component is used for limiting the maximum sliding position of the tensioning and anchoring beam (3); The sliding path of the sliding component is arc-shaped; The sliding assembly comprises an embedded anchor piece (4), an arc-surface support (5) and a sliding groove (6), wherein the arc-surface support (5) is connected to the embedded anchor piece (4), the embedded anchor piece (4) is embedded in the ground anchor (1), the sliding groove (6) is connected to the tensioning anchor beam (3), the arc-surface support (5) is in sliding fit in the sliding groove (6), and the arc-surface support (5) is of a convex arc-surface structure; The limiting assembly comprises a limiting pull rod (7), the limiting pull rod (7) is connected to the tensioning anchoring beam (3), the limiting pull rod (7) is rotationally connected to the ground anchor (1), and the rotation direction of the limiting pull rod (7) is consistent with the cambered surface setting direction of the cambered surface support (5).
  2. 2. The arch bridge buckling cable ground tensioning and anchoring system according to claim 1, wherein the limiting assembly further comprises a limiting hole (8), the limiting hole (8) is formed in the ground anchor (1), the limiting pull rod (7) is L-shaped, one end of the limiting pull rod (7) is connected with the tensioning and anchoring beam (3), and the other end of the limiting pull rod extends into the limiting hole (8).
  3. 3. The arch bridge buckling cable ground tensioning and anchoring system according to claim 2, wherein the tensioning and anchoring beam (3) rotates circumferentially, the cambered surface of the cambered surface support (5) is a circumferential surface, and the limiting hole (8) is positioned at the rotation center.
  4. 4. A ground tensioning and anchoring system for a bridle buckle cable according to claim 3, characterized in that the ground anchor (1) is provided with a reserved tensioning slot (2), two opposite side walls of the reserved Zhang Lacao (2) are respectively provided with one limiting hole (8), and the reserved Zhang Lacao (2) is used for arranging at least one buckle cable (9).
  5. 5. The arch bridge buckling cable ground tensioning and anchoring system according to claim 4, wherein one sliding component is respectively arranged on the ground anchors (1) at two sides of the reserved Zhang Lacao (2), the tensioning and anchoring beam (3) spans the reserved Zhang Lacao (2), and two ends of the tensioning and anchoring beam (3) are respectively connected with one sliding component.
  6. 6. The arch bridge buckling cable ground tensioning and anchoring system according to claim 5, characterized in that the buckling cable (9) is anchored to the tensioning and anchoring beam (3) by means of an anchorage device (10).
  7. 7. A method of arch bridge buckling cable ground tensioning and anchoring, characterized by using the arch bridge buckling cable ground tensioning and anchoring system of claim 6, the method comprising the steps of: S1, pre-burying the pre-buried anchoring piece (4) and the limiting hole (8) according to a designed position, and pouring the ground anchor (1) for molding; S2, installing the cambered surface support (5) on the embedded anchoring piece (4), installing the sliding groove (6) on the tensioning anchoring beam (3), arranging the L-shaped limiting pull rod (7) in the limiting hole (8), wherein the sliding groove (6) is matched with the cambered surface support (5), and the limiting pull rod (7) is detachably connected with the tensioning anchoring beam (3) to temporarily fix the tensioning anchoring beam (3); S3, pulling the tensioning end of the buckling rope (9) to the ground anchor (1), enabling the buckling rope (9) to sequentially penetrate through the reserved Zhang Lacao (2) and the tensioning anchor beam (3), releasing temporary fixation of the tensioning anchor beam (3), tensioning the buckling rope (9) one by one, then anchoring the buckling rope on the tensioning anchor beam (3) through the anchor device (10), and enabling the tensioning anchor beam (3) to rotate on the cambered surface support (5) in a self-adaptive mode in the tensioning process.

Description

Arch bridge buckling cable ground tensioning and anchoring system and method Technical Field The invention relates to the technical field of arch bridge construction, in particular to an arch bridge buckling cable ground tensioning and anchoring system and method. Background Before the general arch bridge is constructed by cable-stayed buckling, the ground anchor is poured, and a beam-penetrating pore canal and a tensioning notch are reserved according to the buckling angle. When the arch bridge is in cable-stayed buckling construction, the whole bundle of buckling ropes passes through the main ground anchor through the reserved tensioning groove, and then the buckling ropes are tensioned to a designed force value after the anchor is installed, so that the tensioning work of the buckling ropes is completed. In the traditional fastening cable ground tensioning and anchoring system, a tensioning notch is designed according to a tensioning angle, and an anchor installation angle is fixed. In the actual construction condition, the angle of the buckling rope often differs from the design due to the influence of factors such as the deviation of the tower, the sag of the buckling rope and the like, and at the moment, the anchorage device cannot adapt to the actual angle of the buckling rope, so that the steel strand is easily folded, and the construction quality is influenced. Meanwhile, a general tension anchorage device is difficult to adapt to a through-length buckle rope, and the quality of a field-processed tension anchorage beam is often uneven. Disclosure of Invention The invention aims to solve the problems that the existing arch bridge buckling cable ground tensioning and anchoring system in the prior art is fixed in ground tensioning end angle, is inconsistent with the buckling cable setting angle, causes buckling and abrasion of the buckling cable, causes the buckling cable to be subjected to shearing force, is not universal in the existing tension and anchoring beam of the through-length buckling cable, and is difficult to guarantee construction quality and material utilization rate. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: In a first aspect, the invention provides an arch bridge buckling cable ground tensioning and anchoring system, which comprises a ground anchor, a tensioning and anchoring beam, a sliding assembly and a limiting assembly, wherein the tensioning and anchoring beam is connected with the ground anchor in a sliding manner through the sliding assembly, the limiting assembly is connected with the ground anchor and the tensioning and anchoring beam, and the limiting assembly is used for limiting the maximum sliding position of the tensioning and anchoring beam. According to the arch bridge buckling cable ground tensioning anchoring system, the sliding component is arranged, so that the tensioning anchoring beam can slide relative to the ground anchor, when the tensioning anchoring beam is used for tensioning an anchoring buckling cable, if the setting angle of the buckling cable is inconsistent with the setting angle of the tensioning anchoring beam, the tensioning anchoring beam bends the buckling cable, shearing force is applied to the buckling cable at the bending position, the tensioning anchoring beam is forced to slide along the sliding component by the reaction force of the shearing force applied to the buckling cable in the tensioning process, namely, the setting angle of the tensioning anchoring beam is adaptively adjusted along with the buckling cable, shearing force is eliminated, the buckling cable is guaranteed to be perpendicular to the anchoring end, only axial force is avoided, buckling and abrasion of the buckling cable are avoided, the limiting component is arranged to limit the maximum sliding position of the tensioning anchoring beam, the tensioning anchoring beam is effectively connected relative to the ground anchor, meanwhile, the tensioning anchoring system can adapt to different setting angles of the buckling cable, a special tensioning anchoring system is not required to be manufactured, the sliding component and the turnover efficiency is improved, the construction efficiency is improved, and the construction efficiency is good. As a preferable technical scheme of the invention, the sliding path of the sliding component is arc-shaped. By adopting the structure, the tensioning anchor beam moves along the arc sliding path, namely, the tensioning anchor beam can rotate in angle and is quickly matched with the setting angle of the buckling rope, so that the self-adaptive adjustment of the tensioning anchor beam is easy. As a further preferable technical scheme of the invention, the sliding assembly comprises an embedded anchor, a cambered surface support and a chute, wherein the cambered surface support is connected with the embedded anchor, the embedded anchor is embedded in the ground anchor, the chute is c