Reinforcing device for bottom transverse beam of cantilever cast-in-place box beam hanging basket

Abstract

The utility model discloses a reinforcing device for a bottom transverse beam of a cantilever cast-in-place box beam hanging basket. The reinforcing device comprises a transverse moving track, and the left side and the right side of the transverse moving track are each provided with a supporting truss capable of sliding. The device further comprises two center hole jacks, the bottom ends of suspenders of the center hole jacks are connected to the rear bottom cross beam, a plurality of sliding beams are fixedly arranged on the rear bottom cross beam, the rear bottom cross beam is connected to the front bottom cross beam through the sliding beams, and the front bottom cross beam is anchored to a lower flange plate of a poured section of the cast-in-place box beam through anchoring parts. The vertical stiffening rods are arranged below the rear bottom cross beam and the front bottom cross beam, and the reinforcing ribs penetrate through all the vertical stiffening rods. According to the device, the reinforcing ribs are arranged and subjected to prestress tensioning, so that the reinforcing ribs have certain pre-camber, the reinforcing ribs are transmitted to the front bottom cross beam and the rear bottom cross beam above the reinforcing ribs through the vertical stiffening rods, the sliding beam between the front bottom cross beam and the rear bottom cross beam is matched, and the problem of potential safety hazards is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of cast-in-place box girder cantilever hanging basket construction, and particularly relates to a reinforcing device for the bottom transverse beam of a hanging basket for cast-in-place box girder cantilever. Background Technique

[0002] In the construction of cast-in-place box girder cantilever hanging basket, the parameters of the hanging basket are generally determined by the manufacturer according to the models of other uniformly processed and customized equipment, and are welded and processed into parts on the construction site and assembled on site. Due to the requirements of quality, economy and safety, the model specifications of the hanging basket rods are usually designed to be relatively small, and only meet the requirements in terms of mechanical strength, while insufficient attention is paid to the stiffness of the hanging basket.

[0003] During the construction of the extra-wide cantilever of the cast-in-place box girder with multiple box chambers, due to the large width of the entire cantilever construction, the bottom transverse beam, that is, the front bottom cross beam, the rear bottom cross beam and the longitudinal beam between them arranged under the cast-in-place section of the box girder, deforms greatly when the stiffness is insufficient, which greatly affects the stability of the hanging basket walking. Even worse, due to excessive deformation, the positions of other rods arranged on the front bottom cross beam, the rear bottom cross beam and the longitudinal beam are deflected, resulting in a change in the center of gravity position during the whole walking process, and there are serious potential safety hazards.

[0004] Therefore, a reinforcing device for the bottom transverse beam of a hanging basket for cast-in-place box girder cantilever is proposed to solve the above technical problems. Content of the Utility Model

[0005] The technical problem solved by the utility model is the problem of inconvenient walking and potential safety hazards caused by large deformation of the bottom transverse beam due to insufficient stiffness of the existing hanging basket rods during the construction of large extra-wide cantilevers of continuous beams with multiple box chambers.

[0006] To solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0007] A strengthening device for the bottom transverse beam of a hanging basket for cast-in-place box girders of a cantilever. The bottom transverse beam includes a front bottom cross beam and a rear bottom cross beam disposed below the cast-in-place section of the box girder. The front bottom cross beam and the rear bottom cross beam are arranged along the advancing direction of the cast-in-place box girder. It further includes a longitudinal beam disposed along the lower outer contour of the cast-in-place section of the box girder, with both ends respectively connected to the front bottom cross beam and the rear bottom cross beam. The front bottom cross beam is also anchored to the lower flange plate of the cast-in-place section of the box girder through an anchor. The hanging basket for the cast-in-place box girder of the cantilever includes a transverse movement track disposed on the cast-in-place stage of the box girder, and further includes two support trusses respectively disposed on the left and right sides of the transverse movement track and capable of sliding on the transverse movement track. It also includes a front upper cross beam disposed on the top of the support truss and perpendicular to the advancing direction of the cast-in-place box girder. It further includes a through jack disposed on the front upper cross beam at the front and rear ends of the support truss and connected to the lower rear bottom cross beam through a suspension rod.

[0008] It includes:

[0009] There are multiple vertical stiffening bars respectively disposed below the front bottom cross beam and the rear bottom cross beam and perpendicular to the lower surface of the cast-in-place section of the box girder.

[0010] Reinforcing ribs are disposed at the lower part of the vertical stiffening bars and penetrate the vertical stiffening bars along the advancing direction of the cast-in-place box girder.

[0011] Connection plates are disposed at the bottom of the first vertical stiffening bar at the head and tail ends of the reinforcing ribs for prestress tensioning.

[0012] Particularly, a bottom formwork for the cast-in-place of the box girder is further disposed on the front bottom cross beam, longitudinal beam and rear bottom cross beam of the bottom transverse beam, and the bottom formwork is driven to rise and fall by the through jack and the suspension rod.

[0013] Particularly, the anchor is a second through jack and a suspension rod. There are multiple anchors, and the multiple anchors are evenly arranged on the front bottom cross beam. The bottom of the suspension rod of the anchor is connected to the top of the lower vertical stiffening bar.

[0014] Particularly, inclined stiffening bars are further disposed on the connection plates and are obliquely connected to the rear bottom cross beam or the front bottom cross beam.

[0015] Particularly, two reinforcing ribs are arranged side by side.

[0016] Compared with the prior art, the utility model has the following advantages and beneficial effects: By arranging stiffeners and prestressing the stiffeners, a certain camber is given to the stiffeners themselves. Through the vertical stiffening rods, the camber is transmitted to the front bottom cross beam and the rear bottom cross beam above, and in cooperation with the longitudinal beam between the front bottom cross beam and the rear bottom cross beam, the stiffness of the hanging basket walking track is effectively improved, thus effectively solving the problems of insufficient walking stability of the bottom hanging basket during walking and the deviation of the positions of other members arranged on the front bottom cross beam, the rear bottom cross beam and the longitudinal beam due to excessive deformation, resulting in a change in the center of gravity position during the overall walking process and bringing potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic cross-sectional structure diagram of the device of the utility model.

[0018] Figure 2 It is a schematic longitudinal-sectional structure diagram of the device of the utility model.

[0019] Figure 3 For Figure 1 The enlarged structure diagram at position A in

[0020] The interpretations of each label in the figure are as follows: transverse movement track - 1; support truss - 2; front upper cross beam - 3; through jack - 4; rear bottom cross beam - 5; longitudinal beam - 6; front bottom cross beam - 7; anchor - 8; vertical stiffening rod - 9; stiffener - 10; connecting plate - 11; bottom formwork - 12; diagonal stiffening rod - 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the utility model, so as to have a further understanding of the concept of the utility model, the technical problems to be solved, the technical features constituting the technical solutions, and the technical effects brought.

[0022] Such as Figure 1 、 Figure 2 And Figure 3As shown in the figure, a strengthening device for the bottom transverse beam of a hanging basket for cast-in-place box girders of a cantilever. The bottom transverse beam includes a front bottom cross beam 7 and a rear bottom cross beam 5 arranged below the cast-in-place section of the box girder. The front bottom cross beam 7 and the rear bottom cross beam 5 are arranged along the advancing direction of the cast-in-place box girder. It also includes a longitudinal beam 6, which is arranged along the lower outer contour of the cast-in-place section of the box girder, and its two ends are respectively connected to the front bottom cross beam 7 and the rear bottom cross beam 5. The front bottom cross beam 7 is also anchored to the lower flange plate of the cast-in-place section of the box girder through an anchor 8. The hanging basket for the cast-in-place box girder of the cantilever includes: a transverse movement track 1 arranged on the cast-in-place stage of the box girder, and also includes two support trusses 2, which are respectively arranged on the left and right sides of the transverse movement track and can slide on the transverse movement track 1. It also includes a front upper cross beam 3 arranged on the top of the support truss 2 and perpendicular to the advancing direction of the cast-in-place box girder. It also includes a through jack 4 arranged on the front upper cross beam 3 at the front and rear ends of the support truss 2 and connected to the rear bottom cross beam 5 below through a suspension rod.

[0023] including:

[0024] There are multiple vertical stiffening bars 9, which are respectively arranged below the front bottom cross beam 7 and the rear bottom cross beam 5 and perpendicular to the lower surface of the cast-in-place section of the box girder.

[0025] Reinforcing ribs 10 are arranged at the lower part of the vertical stiffening bars 9 and penetrate through the vertical stiffening bars 9 along the advancing direction of the cast-in-place box girder.

[0026] Connecting plates 11 are arranged at the bottoms of the first vertical stiffening bars at the head and tail ends of the reinforcing ribs 10 for prestress tensioning.

[0027] The working principle of the present utility model is as follows: The support truss 2 at the top of the cast-in-place box girder provides the supporting force for the whole device and transmits the supporting force to the cast-in-place section of the box girder below, and then to the ground through the pier. The through jack 4 is connected to the rear bottom cross beam 5 through a suspension rod. The rear bottom cross beam 5, the longitudinal beam 6, and the front bottom cross beam 7 cooperate with the anchor to form the supporting structure of the whole supporting device. The function of the vertical stiffening bar 9 is to connect the reinforcing rib 10 with the front bottom cross beam 7 and the rear bottom cross beam 5. After the installation is completed, by installing the prestress tensioning instrument on the connecting plate 11, it is convenient to carry out prestress tensioning on the reinforcing rib 10. After the tensioning is completed, it is clamped by a splint to prevent the reinforcing rib 10 from rebounding, so that the reinforcing rib 10 has a certain pre-arch in the initial state, effectively enhancing the stiffness of the upper rear bottom cross beam 5 and the front bottom cross beam 7, effectively preventing the downward deflection of both ends of the bottom cross beam of the hanging basket, and preventing excessive deformation during the walking process of the hanging basket. When a stage of pouring is completed, first release the anchor 8 and lower the suspension rod of the through jack 4 for demoulding operation, and then move the support truss 2 outward through the transverse movement track 1 to facilitate the pouring of the next section. After all sections are poured, move along the axis direction of the cast-in-place box girder to the pouring operation of the next box girder.

[0028] As a preferred embodiment, a bottom formwork 12 for cast-in-place box girder pouring is further provided on the front bottom cross beam 7, longitudinal beam 6 and rear bottom cross beam 5 of the bottom transverse beam, and the bottom formwork 12 is lifted and lowered by a through jack 4 and a suspension rod.

[0029] In this embodiment, the bottom formwork 12 is arranged on the front bottom cross beam 7, longitudinal beam 6 and rear bottom cross beam 5, and can cooperate with the through jack 4 and the anchor fittings to realize the rapid lifting and lowering of the bottom formwork 12, that is, the installation and demoulding process of the bottom formwork 12 can be completed quickly, effectively accelerating the pouring speed of the cast-in-place box girder in the subsequent segment to be poured.

[0030] As a further embodiment, the anchor fitting 8 is a second through jack and a suspension rod; there are a plurality of anchor fittings 8, and the plurality of anchor fittings 8 are uniformly arranged on the front bottom cross beam 7, and the bottom of the suspension rod of the anchor fitting 8 is connected to the top of the vertical stiffening bar 9 below.

[0031] In this embodiment, by setting the anchor fitting 8 as a second through jack and a suspension rod and connecting it to the top of the vertical stiffening bar 9, it can effectively cooperate with the through jack 4 to realize the stable and rapid lifting and lowering between the bottom formwork and the bottom transverse beam, ensuring the balance of the overall lifting of the bottom formwork 12. At the same time, the connection firmness between the front bottom cross beam 7 and the poured segment of the cast-in-place box girder is strengthened by a plurality of anchor fittings 8, which can also help to avoid the situation of downward bending or deformation in the middle of the beam body of the front bottom cross beam 7.

[0032] As a preferred embodiment, an inclined stiffening bar 13 is further provided on the connecting plate 11 and is inclinedly connected to the rear bottom cross beam 5 or the front bottom cross beam 7.

[0033] In this embodiment, the inclined stiffening bar 13 can effectively increase the connection force between the connecting plate 11, the reinforcing rib 10 and the rear bottom cross beam 5 or the front bottom cross beam 7, effectively increasing the overall stability of the device.

[0034] As a preferred embodiment, two reinforcing ribs 10 are arranged side by side.

[0035] In this embodiment, two reinforcing ribs 10 are arranged side by side, respectively located on the left and right sides of the vertical stiffening bar 9, thereby providing more stable and reliable support for the upper front bottom cross beam 7 and rear bottom cross beam 5.

[0036] The "connection" and "fixation" appearing in the description of the present utility model can be fixed connection, machining, welding, or mechanical connection. The specific meanings of the above terms in the present utility model should be understood according to the specific circumstances.

[0037] In the description of the present utility model, terms such as "center", "upper", "lower", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying a specific orientation that the device or element referred to must have. Therefore, it should not be construed as a limitation to the present utility model.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A reinforcing device for a bottom transverse beam of a cantilever cast-in-place box girder hanging basket, the bottom transverse beam comprising a front bottom transverse beam (7) and a rear bottom transverse beam (5) arranged below a cast-in-place box girder section, the front bottom transverse beam (7) and the rear bottom transverse beam (5) being arranged along the travel direction of the cast-in-place box girder; further comprising a longitudinal beam (6), the longitudinal beam (6) being arranged along the lower outer contour of the cast-in-place box girder section, the two ends of the longitudinal beam (6) being respectively connected to the front bottom transverse beam (7) and the rear bottom transverse beam (5); the front bottom transverse beam (7) is also anchored to the lower flange plate of the cast-in-place box girder section by an anchoring piece (8); the cantilever cast-in-place box girder hanging basket comprising: A transverse track (1) arranged on the cast-in-place box girder at the cast-in-place stage, further comprising two support trusses (2), the two support trusses (2) being arranged on the left and right sides of the transverse track respectively and being able to slide on the transverse track (1); further comprising a front upper crossbeam (3) arranged on the top of the support truss (2) and perpendicular to the travel direction of the cast-in-place box girder; further comprising a through-hole jack (4) arranged on the front upper crossbeam (3) at the front and rear ends of the support truss (2) and connected to the rear bottom crossbeam (5) below via a suspension rod; The invention is characterized by comprising: A plurality of vertical stiffening rods (9) are provided, each of which is arranged below the front bottom cross beam (7) and the rear bottom cross beam (5), and is perpendicular to the lower surface of the cast-in-place box beam section; A reinforcing rib (10) is disposed at the lower portion of the vertical reinforcing rod (9) and penetrates the vertical reinforcing rod (9) along the travel direction of the cast-in-place box girder; The connecting plate (11) is arranged at the bottom of the first vertical stiffening rod at both ends of the stiffening rib (10) and is used for prestressing.

2. A reinforcing device for the bottom transverse beam of a cantilever cast-in-situ box beam hanging basket as claimed in claim 1, characterized in that: A bottom template (12) for casting a cast-in-place box beam is also provided on the front bottom cross beam (7), the longitudinal beam (6) and the rear bottom cross beam (5) of the bottom transverse beam. The bottom template (12) is driven to rise and fall by a through-hole jack (4) and a suspension rod.

3. A reinforcing device for the bottom transverse beam of a cantilever cast-in-situ box beam hanging basket as claimed in claim 2, characterized in that: The anchor (8) is a second through-hole jack and a suspension rod; a plurality of anchors (8) are provided, and the plurality of anchors (8) are evenly arranged on the front bottom cross beam (7), and the bottom of the suspension rod of the anchor (8) is connected to the top of the vertical stiffening rod (9) below.

4. A reinforcing device for the bottom transverse beam of a cantilever cast-in-situ box beam hanging basket as claimed in claim 1, characterized in that: The connecting plate (11) is also provided with an oblique stiffening rod (13) obliquely connected to the rear bottom cross beam (5) or the front bottom cross beam (7).

5. A reinforcing device for the bottom transverse beam of a cantilever cast-in-situ box beam hanging basket as claimed in claim 1, characterized in that: Two reinforcing ribs (10) are arranged side by side.

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