Search

CN-224213160-U - External prestress steel beam anchoring device for box girder

CN224213160UCN 224213160 UCN224213160 UCN 224213160UCN-224213160-U

Abstract

The utility model relates to the technical field of box girder reinforcement, and discloses an in-vitro prestress steel bundle anchoring device for a box girder. The external prestress steel beam anchoring device for the box girder comprises a support capable of being mounted on the box girder, a steel anchoring piece arranged on the support, a supporting assembly and a steering tube, wherein the supporting assembly comprises a plurality of first supporting steel plates and second supporting steel plates corresponding to the first supporting steel plates one by one, the first supporting steel plates and the second supporting steel plates are respectively arranged on two sides of the steel anchoring piece, the first supporting steel plates and the second supporting steel plates are fixedly connected with the steel anchoring piece, the steering tube is located at one end, far away from the steel anchoring piece, of the first supporting steel plates, and the external prestress steel beam can penetrate through the steering tube and is anchored to the steel anchoring piece. The external prestress steel beam anchoring device for the box girder has the advantages of being small in dead weight and convenient to construct, not only reducing construction cost and shortening construction period, but also obviously reducing the additional weight of the box girder and ensuring the safety of the box girder structure.

Inventors

  • Jin Shichuan
  • SHI ZHAODONG
  • WANG SONGSONG
  • XI YOUYOU

Assignees

  • 浙江数智交院科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250516

Claims (10)

  1. 1. An in vitro pre-stressed steel beam anchoring device for box girders, comprising: a support (1) that can be attached to a bottom plate (101) or a top plate (102) of a box girder (100); The steel anchoring piece (2) is arranged on the support (1), and the external prestress steel beam (200) can be anchored on the steel anchoring piece (2); The support assembly (3) is arranged on the support (1), the support assembly (3) comprises a plurality of first support steel plates (31) and a plurality of second support steel plates (32), the first support steel plates (31) and the second support steel plates (32) are respectively arranged on two sides of the steel anchor (2) along the thickness direction of the steel anchor, the first support steel plates (31) are symmetrically arranged along the extending direction of the steel anchor (2), the second support steel plates (32) are in one-to-one correspondence with the first support steel plates (31), and the first support steel plates (31) and the second support steel plates (32) are fixedly connected with the steel anchor (2); Steering tube (4), set up in support (1) and lie in first supporting steel sheet (31) keep away from the one end of steel anchor assembly (2), steering tube (4) deviate from the one end of steel anchor assembly (2) is provided with first perforation, steering tube (4) orientation steel anchor assembly (2) one end is provided with the second perforation, first fenestrate height is different with the fenestrate height of second, external prestressing force steel bundle (200) can get into via first perforation steering tube (4) inner chamber and via the second perforation wears out.
  2. 2. The external pre-stressing steel beam anchoring device for box girders according to claim 1, characterized in that it further comprises a plurality of anchoring rods (5), a plurality of said anchoring rods (5) being arranged in a matrix, said support (1) comprising a first connection plate (11), said steel anchoring member (2) being arranged in said first connection plate (11), said first connection plate (11) being capable of being conformed to the bottom plate (101) or the top plate (102) of said box girders (100), said anchoring rods (5) passing through said first connection plate (11) and being anchored to the bottom plate (101) or the top plate (102) of said box girders (100).
  3. 3. The external pre-stressing steel beam anchoring device for box girders according to claim 2, characterized in that the support (1) further comprises a concrete seat (12), the concrete seat (12) being mountable to the floor (101) of the box girder (100), the first connection plate (11) being embedded in the top of the concrete seat (12), the anchoring rod (5) passing through the first connection plate (11) and being anchored to the concrete seat (12) or the anchoring rod (5) passing through the first connection plate (11) and the concrete seat (12) and being anchored to the floor (101) of the box girder (100).
  4. 4. The external pre-stressing steel beam anchoring device for box girders according to claim 1, characterized in that the external pre-stressing steel beam anchoring device for box girders is arranged at the end of the box girders (100), the end of the box girders (100) is provided with a diaphragm plate (103), the external pre-stressing steel beam anchoring device for box girders further comprises a first backing plate (61), a second backing plate (62) and a plurality of counter-pulling members (63), the first backing plate (61) can be attached to one side of the diaphragm plate (103) facing away from the second supporting steel plate (32), the second backing plate (62) can be attached to one side of the diaphragm plate (103) facing towards the second supporting steel plate (32) and is fixedly connected with the second supporting steel plate (32), and the counter-pulling members (63) are arranged on the first backing plate (61) and the diaphragm plate (103) in a penetrating manner or the counter-pulling members (63) are arranged on the second backing plate (62) in a penetrating manner and are fixed on the first backing plate (62) and the second backing plate (62).
  5. 5. The external pre-stressing steel beam anchoring device for box girders according to claim 1, characterized in that the supporting assembly (3) further comprises a second connecting plate (331), the second connecting plates (331) are arranged between any adjacent two of the first supporting steel plates (31), one end of the second connecting plate (331) is connected with one of the adjacent two first supporting steel plates (31), and the other end is connected with the other of the adjacent two first supporting steel plates (31).
  6. 6. The external prestress steel beam anchoring device for a box girder according to claim 1, wherein the support assembly (3) further comprises a plurality of first stiffening plates (332) provided to the first support steel plate (31), the plurality of first stiffening plates (332) being arranged at intervals in a vertical direction, the first stiffening plates (332) being perpendicular to the first support steel plate (31) and extending in an extending direction of the first support steel plate (31).
  7. 7. The external pre-stressed steel tendon anchor for box girders according to claim 6, characterized in that the support assembly (3) further comprises a plurality of second stiffening plates (333), a plurality of the second stiffening plates (333) are arranged at intervals in the vertical direction, the first stiffening plates (332) and the second stiffening plates (333) are provided separately on both sides of the first support steel plate (31), and the second stiffening plates (333) are parallel to the first stiffening plates (332).
  8. 8. The external prestress steel beam anchoring device for a box girder according to claim 1, wherein the support assembly (3) further comprises a plurality of third stiffening plates (334) provided to the first support steel plate (31), the plurality of third stiffening plates (334) being arranged at intervals along the extending direction of the first support steel plate (31), the third stiffening plates (334) being perpendicular to the first support steel plate (31) and extending in a vertical direction.
  9. 9. The external pre-stressing steel bundle anchoring device for box girders according to any one of claims 1-8, characterized in that the steel anchoring member (2) comprises a steel anchoring plate and an anchoring disc arranged on the steel anchoring plate, the steel anchoring plate is fixedly connected with the support (1), an anchoring hole is arranged on the anchoring disc, and the external pre-stressing steel bundle (200) can pass through the anchoring hole and be clamped by the wall of the anchoring hole.
  10. 10. The external prestress steel beam anchoring device for a box girder according to any one of claims 1-8, wherein a plurality of bearing seats (7) are arranged on the support (1), the bearing seats (7) are arranged at intervals along the extending direction of the steering tube (4), an arc-shaped groove (71) is arranged on the bearing seat (7), and the steering tube (4) is clamped in the arc-shaped groove (71).

Description

External prestress steel beam anchoring device for box girder Technical Field The utility model belongs to the technical field of box girder reinforcement, and particularly relates to an in-vitro prestress steel bundle anchoring device for a box girder. Background The box girder is used as a key bearing member of a bridge structure, continuously bears the influence of multiple factors such as dynamic load of a vehicle, environmental erosion, material aging and the like in a long-term service process, commonly has typical diseases such as mid-span downwarping and cracking, seriously threatens the safety of the structure and reduces the service performance. Aiming at the cracking damage of different degrees, the repairing technologies such as a pressure grouting method, a bonded steel plate reinforcing method, an in-vitro prestress reinforcing method and the like are mainly adopted in engineering practice. The external prestress reinforcement technology constructs a stress system which works cooperatively with the original structure by reasonably arranging prestress steel bundles in the box girder, so that the stress performance of the structure can be effectively improved, and the rigidity, the bearing capacity and the durability of the girder are obviously improved. In the aspect of the connection structure of the external prestress steel bundles and the box girder, the existing technology generally adopts a mode of pouring concrete anchoring blocks in the box chamber and anchoring the prestress steel bundles therein to realize prestress transmission. However, a plurality of prestressed steel bundles are arranged in the box girder, so that the volume of the concrete anchoring block is greatly increased to meet the anchoring requirement, the construction cost is obviously increased, the construction period is prolonged, the stress state of the box girder is changed due to the increase of the additional mass, and the overall performance of the structure is further adversely affected. Accordingly, there is a need for an in vitro pre-stressed steel beam anchoring device for box girders that solves the above-mentioned problems. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model aims to provide the external prestress steel beam anchoring device for the box girder, which is applicable to the bottom plate and the top plate of the box girder, has small dead weight and convenient construction, reduces the construction cost, shortens the construction period, obviously reduces the additional weight born by the box girder and ensures the safety of the box girder structure. To achieve the purpose, the utility model adopts the following technical scheme: there is provided an in vitro pre-stressed steel beam anchoring device for a box beam, comprising: the support can be arranged on the bottom plate or the top plate of the box girder; the steel anchoring piece is arranged on the support, and the external prestress steel beam can be anchored on the steel anchoring piece; The support assembly is arranged on the support and comprises a plurality of first support steel plates and a plurality of second support steel plates, the first support steel plates and the second support steel plates are respectively arranged on two sides of the steel anchoring piece in the thickness direction of the steel anchoring piece, the plurality of first support steel plates are symmetrically arranged along the extending direction of the steel anchoring piece, the plurality of second support steel plates correspond to the plurality of first support steel plates one by one, and the first support steel plates and the second support steel plates are fixedly connected with the steel anchoring piece; The steering tube is arranged on the support and is positioned at one end of the first supporting steel plate, which is far away from the steel anchoring piece, a first perforation is arranged at one end of the steering tube, which is far away from the steel anchoring piece, a second perforation is arranged at one end of the steering tube, which is far towards the steel anchoring piece, the height of the first perforation is different from that of the second perforation, and the external prestress steel beam can enter the inner cavity of the steering tube through the first perforation and pass out through the second perforation. Optionally, the external prestress steel beam anchoring device for the box girder further comprises a plurality of anchoring rods, the plurality of anchoring rods are arranged in a matrix, the support comprises a first connecting plate, the steel anchoring pieces are arranged on the first connecting plate, the first connecting plate can be attached to the bottom plate or the top plate of the box girder, and the anchoring rods penetrate through the first connecting plate and are anchored to the bottom plate or the top plate of the box girder. Optionally, the support further comprises a con