Double-wall steel hanging box cofferdam hoisting system

Abstract

The utility model relates to the technical field of hoisting systems, and provides a double-wall steel hanging box cofferdam hoisting system aiming at the problem that a traditional double-wall steel hanging box cofferdam structure is difficult to hoist and place, the double-wall steel hanging box cofferdam hoisting system comprises an outrigger horizontally arranged at the top end of a steel casing in a supported mode, and the two ends of the outrigger both extend out of the periphery of the steel casing; core-through jacks are vertically arranged at the two ends of the outrigger in a supported mode, steel strands are arranged on the core-through jacks in a penetrating mode, and the bottom ends of the steel strands are connected with a bottom plate of the double-wall steel hanging box cofferdam structure through connecting assemblies. The double-wall steel hanging box cofferdam structure has the effect that the double-wall steel hanging box cofferdam structure can be conveniently hung.

Description

Technical Field

[0001] The present application relates to the field of hoisting systems, and in particular to a double-walled steel box cofferdam hoisting system. Background Art

[0002] As a pre-project in the bridge pedestal construction process, the double-walled steel box cofferdam structure can provide a dry construction environment for the subsequent bridge pedestal construction, and can also serve as a template structure for the subsequent pedestal pouring construction.

[0003] In related technologies, such as Figure 1 The double-walled steel box cofferdam structure 2 includes a bottom plate 21 and a steel box 22; the bottom plate 21 is composed of a plurality of precast plates 211 mounted on the steel casing 1 of the cap steel pipe pile and a post-cast strip 212 cast between adjacent precast plates 211, and the steel box 22 is composed of a plurality of double-layer steel wall panels supported around the bottom plate 21.

[0004] During the construction of the steel box cofferdam, it is necessary to first build an assembly platform on the steel casing for assembling the cofferdam structure, then hoist the precast panels in blocks and insert them into the corresponding steel casing, and pour the post-cast strips between adjacent precast panels to form an integral bottom plate; then hoist and assemble the double-layer steel wall panels on the outer periphery of the bottom plate to form a steel box. After the above steps are completed, it is necessary to remove the assembly platform on the casing and hoist the double-walled steel box cofferdam structure to the designed depth of the bottom water.

[0005] In view of the above-mentioned related technologies, the double-walled steel box cofferdam structure is currently generally hoisted and laid by multiple floating cranes. However, due to the environmental restrictions of the construction waters, such as in construction areas with shallow water depths or turbulent water flow, the conditions for floating cranes to enter the site are usually not met, resulting in significant restrictions on the hoisting construction of the double-walled steel box cofferdam structure. Therefore, there is room for improvement. Utility Model Content

[0006] In order to facilitate the hoisting construction of a double-walled steel box cofferdam structure and reduce the restrictions of water environment factors on the hoisting construction of a double-walled steel box cofferdam structure, the present application provides a double-walled steel box cofferdam hoisting system.

[0007] The present application provides a double-wall steel box cofferdam hoisting system, which adopts the following technical solution:

[0008] A double-walled steel box cofferdam hoisting system includes a cantilever beam horizontally supported on the top of a steel casing, with both ends of the cantilever beam extending out of the outer circumference of the steel casing; through-hole jacks are vertically supported at both ends of the cantilever beam, and steel strands are passed through the through-hole jacks, and the bottom ends of the steel strands are connected to the bottom plate of the double-walled steel box cofferdam structure through a connecting assembly.

[0009] By adopting the above technical solution, after the double-walled steel box cofferdam structure is assembled, a cantilever beam is supported on the top of the steel casing of each steel pipe pile of the pier cap, and after supporting through-hole jacks at both ends of the cantilever beam, the steel strand is passed through the through-hole jack, and the other end of the steel strand is connected to the prefabricated plate of the bottom plate through the connecting assembly to achieve the connection between the system and the cofferdam structure. Subsequently, the through-hole jacks at both ends of the cantilever beam are used to tension the respective steel strands, which can drive the double-walled steel box cofferdam structure to be hoisted along the steel casing. Compared with the traditional method of hoisting the double-walled steel box cofferdam structure by floating crane, it effectively solves the problem that the floating crane cannot enter the construction site due to water environment restrictions, which affects the hoisting construction of the double-walled steel box cofferdam structure, making the hoisting construction of the double-walled steel box cofferdam structure simpler and more convenient.

[0010] Preferably, the connecting assembly includes a shoulder pole beam, a main support, a secondary support and a connecting pin; the bottom end of the steel strand is connected to the shoulder pole beam through an anchor, and the main support is connected to the bottom of the shoulder pole beam; the secondary support is connected to a prefabricated plate of a base plate; two oppositely arranged main ear plates are provided at the bottom of the main support, and a secondary ear plate is provided on the secondary support; the secondary ear plate is embedded between the two main ear plates; the connecting pin is passed through the main ear plate and the secondary ear plate.

[0011] By adopting the above technical solution, when connecting the steel strand and the bottom plate, the auxiliary ear plate on the auxiliary support is embedded between the two main ear plates of the main support, and the connecting pin is inserted into the two main ear plates and the auxiliary ear plate, so that the bottom end of the steel strand and the bottom plate of the double-walled steel box cofferdam structure can be firmly connected. After the double-walled steel box cofferdam structure is hoisted, the connecting pin is removed from the two main ear plates and the auxiliary ear plates, and the connection between the steel strand and the bottom plate can be disconnected, which is convenient for the disassembly and assembly of the steel strand.

[0012] Preferably, an anti-dropout pin is further provided at the tail end of the connecting pin, and the anti-dropout pin is vertically penetrated through the connecting pin.

[0013] By adopting the above technical solution, an anti-drop pin is inserted into the tail end of the connecting pin, and the connecting pin is limited by the anti-drop pin to prevent the connecting pin from detaching from the main ear plate and the auxiliary ear plate during the subsequent lifting process, thereby facilitating a stable connection between the steel strand and the base plate.

[0014] Preferably, the bottom of the auxiliary support is connected to the prefabricated plate of the base plate through an embedded part, and the embedded part includes a plurality of connecting ribs arranged at the bottom of the auxiliary support, and the connecting ribs are welded and fixed to the internal steel bars of the prefabricated plate.

[0015] By adopting the above technical solution, on the one hand, the installation of the auxiliary support can be completed together with the production process of the prefabricated plate of the base plate, which is convenient for the installation and fixation of the auxiliary support; on the other hand, it is beneficial to improve the connection strength between the auxiliary support and the base plate, so that the auxiliary support is not easy to separate from the prefabricated plate on the base plate of the cofferdam structure.

[0016] Preferably, the bottoms of both ends of the cantilever beam are provided with clamping pieces, and the clamping pieces are welded and fixed to the steel casing.

[0017] By adopting the above technical solution, the cantilever beam can be stably installed on the top of the steel casing, reducing the displacement of the cantilever beam when the subsequent through-hole jack is used to tension the steel strands to suspend the double-walled steel box cofferdam structure.

[0018] Preferably, the clamping member includes two clamping plates arranged opposite to each other, a gap is left between the two clamping plates to form a clamping groove, the top wall of the steel casing is embedded in the clamping groove, and the clamping plates are welded and fixed to the steel casing.

[0019] By adopting the above technical solution, the cooperation between the clamping groove and the wall of the steel casing is utilized to further limit the cantilever beam, which is conducive to more firmly installing the cantilever beam on the top of the steel casing.

[0020] Preferably, the cantilever beam is vertically supported by two guide frames corresponding to the two through-hole jacks, and the guide frames include a plurality of guide plates, and the guide plates are evenly distributed along the height direction of the guide frames, and the guide plates are all located above the corresponding through-hole jacks, and the guide plates are all provided with guide holes for the steel strands to pass through.

[0021] By adopting the above technical solution, the steel strand is passed through the guide holes on several guide plates while being passed through the through-hole jack. The guide frame is used to support and limit the steel strand, so as to prevent the top end of the steel strand from being entangled and knotted due to excessive bending or interlacing during the subsequent process of tensioning the steel strand by the through-hole jack.

[0022] Preferably, the shoulder pole beam is a double-piece I-beam, and the webs on both sides of the shoulder pole beam are vertically welded with a plurality of reinforcing ribs, and the top and bottom ends of the reinforcing ribs are respectively welded and fixed to the upper wing plate and the lower wing plate of the shoulder pole beam.

[0023] By adopting the above technical solution, the overall strength and bending resistance of the shoulder beam are improved through a number of reinforcing ribs, which is conducive to the stable connection between the steel strands and the base plate.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. By tensioning the corresponding steel strands with through-jacks at both ends of the cantilever beam, the overall lifting and placing of the double-walled steel box cofferdam structure can be realized; there is no need to use a floating crane to lift the double-walled steel box cofferdam structure, thus reducing the impact of environmental factors on the lifting and placing construction of the double-walled steel box cofferdam structure.

[0026] 2. Connect the steel strand and the double-wall steel strand cofferdam structure, embed the auxiliary ear plate on the auxiliary support between the two main ear plates of the main support, and then pass the connecting pin through the main ear plate and the auxiliary ear plate to achieve a stable connection between the steel strand and the bottom plate.

[0027] 3. By setting a guide frame at the end of the cantilever beam, after the steel strands are passed through the guide holes of several guide plates on the guide frame, the guide frame can be used to support and limit the steel strands, thereby preventing the top of the steel strands from getting tangled and knotted due to excessive bending or interlacing during the subsequent process of tensioning the steel strands with the through-core jack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram used in this application to illustrate the double-walled steel box cofferdam structure.

[0029] Figure 2 It is a schematic diagram of the structure of the cantilever beam and steel casing used in the embodiment of the present application.

[0030] Figure 3 It is a schematic diagram of the overall structure of the lifting system used to illustrate the embodiment of the present application.

[0031] Figure 4 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0032] Figure 5 It is a structural schematic diagram used to illustrate the connection components in an embodiment of the present application.

[0033] Figure 6 yes Figure 5 Enlarged schematic diagram of part B in the middle.

[0034] Description of reference numerals:

[0035] 1. Steel casing; 2. Double-walled steel box cofferdam structure; 21. Bottom plate; 211. Precast plate; 212. Post-cast strip; 22. Steel box; 3. Cantilever beam; 4. Through-hole jack; 41. Steel strand; 42. Snap-on plate; 5. Connecting assembly; 51. Shoulder beam; 511. Reinforced rib plate; 52. Main support; 521. Main ear plate; 53. Auxiliary support; 531. Auxiliary ear plate; 532. Connecting rib; 54. Connecting pin; 541. Connecting through hole; 6. Guide frame; 60. Support rod; 61. Guide plate; 611. Guide hole. DETAILED DESCRIPTION

[0036] The following is combined with Figure 2-6 This application is described in further detail.

[0037] The present application embodiment discloses a double-wall steel hanging box cofferdam hoisting system, referring to Figure 1 and Figure 2, including a cantilever beam 3 supported at the top end of a steel casing 1 of a cap steel pipe pile; both ends of the cantilever beam 3 extend out of the outer periphery of the steel casing 1; both ends of the cantilever beam 3 are vertically supported with through-core jacks 4, through-core jacks 4 are penetrated with steel strands 41, and the bottom ends of the steel strands 41 are connected to the prefabricated plate 211 of the bottom plate 21 of the cofferdam structure through a connecting assembly 5.

[0038] Subsequently, the steel strands 41 are tensioned by the through-hole jacks 4 at both ends of the cantilever beam 3, so that the double-walled steel box cofferdam structure 2 can be driven to move up and down along the steel casing 1, thereby realizing the hanging and placing of the double-walled steel box cofferdam structure 2.

[0039] In this embodiment, the cantilever beam 3 is a double-jointed I-beam. A clamping piece is provided at the bottom of both ends of the cantilever beam 3, and the clamping piece includes two clamping plates 42 vertically welded at the bottom of the cantilever beam 3; the two clamping plates 42 are arranged opposite to each other, and a gap is left between the two clamping plates 42 to form a clamping groove for the top wall of the steel casing 1 to be embedded; the top wall of the steel casing 1 is embedded in the two clamping grooves at the bottom of the cantilever beam 3; the two clamping plates 42 of the clamping piece are respectively welded and fixed to the inner and outer walls of the steel casing 1, so that the cantilever beam 3 is stably installed at the top of the steel casing 1, and the displacement of the cantilever beam 3 during the subsequent construction process is limited.

[0040] The guide frame 6 is vertically supported on the cantilever beam 3 corresponding to the two through-hole jacks 4, and the guide frame 6 is sleeved on the outer periphery of the corresponding through-hole jacks 4; the guide frame 6 includes four support rods 60 distributed in a rectangular shape, and the guide frame 6 also includes a plurality of guide plates 61, each of which is provided with a guide hole 611 for the steel strand 41 to pass through, and the guide plate 61 is located between the four support rods 60 and is welded and fixed to the four support rods 60. The four support rods 60 are located on the outer periphery of the corresponding through-hole jacks 4, and the bottom ends of the four support rods 60 are welded and fixed to the cantilever beam 3, so as to realize a stable connection between the guide frame 6 and the cantilever beam 3. The plurality of guide plates 61 are located above the corresponding through-hole jacks 4, and the plurality of guide plates 61 are evenly distributed along the height direction of the guide frame 6. The top of the steel strand 41 is passed through the guide hole 611 of the plurality of guide plates 61. The guide frame 6 is used to support and limit the top of the steel strand 41, so as to prevent the portion of the steel strand 41 extending out of the top of the through-hole jack 4 from being entangled due to excessive bending or interlacing during the subsequent process of tensioning the steel strand 41 by the through-hole jack 4.

[0041] Reference Figure 4 and Figure 5The connecting assembly 5 includes a shoulder pole beam 51, two main supports 52 and two secondary supports 53; the bottom end of the steel strand 41 is connected to the shoulder pole beam 51 through an anchor to achieve a stable connection between the shoulder pole beam 51 and the steel strand 41; the two main supports 52 are welded and fixed to the bottom of the shoulder pole beam 51; the two secondary supports 53 are connected to the prefabricated plate 211 of the base plate 21; the two main supports 52 correspond to the two secondary supports 53 one by one. Two oppositely arranged main ear plates 521 are vertically connected to the bottom of the main support 52, and a gap is left between the two main ear plates 521. The secondary support 53 is connected to the secondary ear plate 531, and the secondary ear plate 531 is embedded in the gap between the two main ear plates 521 corresponding to the main support 52; the connecting component 5 also includes a connecting pin 54 arranged between the main support 52 and the secondary support 53; the connecting pin 54 passes through the two main ear plates 521 on the main support 52 and the secondary ear plate 531 on the secondary support 53 to connect the main support 52 and the secondary support 53, so as to realize that the steel strand 41 is firmly connected to the bottom plate 21 of the double-walled steel box cofferdam structure 2 through the connecting component 5.

[0042] The tail ends of the connecting pins 54 are vertically penetrated with anti-drop pins, and the outer periphery of the tail ends of the connecting pins 54 is also provided with connecting through holes 541 for the anti-drop pins to penetrate; the setting of the anti-drop pins is convenient for limiting the position of the connecting pins 54, so as to prevent the displacement and separation of the connecting pins 54 when the subsequent through-core jacks 4 tension the steel strands 41 to suspend the cofferdam structure, so as to facilitate the connecting pins 54 to more firmly connect the main support 52 and the auxiliary support 53. In other embodiments, the anti-drop pins can be replaced with R buckles.

[0043] Reference Figure 5 and Figure 6 The bottom of the auxiliary support 53 is fixed to the prefabricated plate 211 of the base plate 21 through embedded parts. The embedded parts include a plurality of connecting ribs 532 welded and fixed to the bottom of the auxiliary support 53. The end of the connecting rib 532 away from the auxiliary support 53 is welded and fixed to the steel bar structure inside the prefabricated plate 211. Through the above arrangement, on the one hand, during the production process of the prefabricated plate 211, the auxiliary support 53 can be installed and fixed to the prefabricated plate 211 together, and there is no need to subsequently install and fix the auxiliary support 53 at the construction site; on the other hand, by welding and fixing the connecting ribs 532 to the internal steel bar structure of the prefabricated plate 211, it is beneficial to improve the connection strength between the auxiliary support 53 and the prefabricated plate 211.

[0044] In this embodiment, the shoulder pole beam 51 is a double I-beam; a number of reinforcing ribs 511 are welded and fixed on the webs on opposite sides of the shoulder pole beam 51, and the top and bottom ends of the reinforcing ribs 511 are respectively welded and fixed to the upper wing plate and the lower wing plate of the shoulder pole beam 51. The above arrangement is beneficial to improving the overall strength and bending resistance of the shoulder pole beam 51, and further facilitates the bottom end of the steel strand 41 to be more firmly connected to the bottom plate 21 of the cofferdam structure through the connecting assembly 5.

[0045] The implementation principle of the embodiment of the present application is as follows: during the construction of the double-walled steel box cofferdam structure 2, a cantilever beam 3 is welded on the top of the steel casing 1 of each foundation steel pipe pile, and a through-hole jack 4 and a guide frame 6 are installed at both ends of the cantilever beam 3; the steel strand 41 is passed through the guide holes 611 of several guide plates 61 on the guide frame 6 and passed into the through-hole jack 4, and at the same time, the bottom end of the steel strand 41 is connected to the bottom plate 21 of the double-walled steel box cofferdam structure 2 through the connecting assembly 5. After the assembly platform for assembling the double-walled steel box cofferdam structure 2 on the outer periphery of the steel casing 1 is subsequently dismantled, the corresponding steel strand 41 is tensioned by the through-hole jacks 4 at both ends of the cantilever beam 3, so that the hoisting construction of the double-walled steel box cofferdam structure 2 is simpler and more convenient.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double-walled steel box cofferdam hoisting system, characterized by: It comprises a cantilever beam (3) horizontally supported on the top of a steel casing (1), both ends of the cantilever beam (3) extending out of the outer periphery of the steel casing (1); both ends of the cantilever beam (3) are vertically supported with through-hole jacks (4), both of the through-hole jacks (4) are penetrated with steel strands (41), and the bottom ends of the steel strands (41) are connected to the bottom plate (21) of the double-walled steel hanging box cofferdam structure (2) through a connecting assembly (5).

2. A double-walled steel box cofferdam hoisting system according to claim 1, characterized in that: The connecting assembly (5) comprises a shoulder beam (51), a main support (52), a secondary support (53) and a connecting pin (54); the bottom end of the steel strand (41) is connected to the shoulder beam (51) through an anchor, and the main support (52) is connected to the bottom of the shoulder beam (51); the secondary support (53) is connected to the prefabricated plate (211) of the base plate (21); two main ear plates (521) arranged opposite to each other are arranged at the bottom of the main support (52), and a secondary ear plate (531) is arranged on the secondary support (53); the secondary ear plate (531) is embedded between the two main ear plates (521); the connecting pin (54) is passed through the main ear plate (521) and the secondary ear plate (531).

3. A double-walled steel box cofferdam hoisting system according to claim 2, characterized in that: The rear end of the connecting pin (54) is also provided with an anti-dropout pin, and the anti-dropout pin is vertically penetrated through the connecting pin (54).

4. A double-walled steel box cofferdam hoisting system according to claim 2, characterized in that: The bottom of the auxiliary support (53) is connected to the prefabricated plate (211) of the base plate (21) through an embedded part, and the embedded part includes a plurality of connecting ribs (532) arranged at the bottom of the auxiliary support (53), and the connecting ribs (532) are welded and fixed to the internal steel bars of the prefabricated plate (211).

5. A double-walled steel box cofferdam hoisting system according to claim 1, characterized in that: The bottoms of both ends of the cantilever beam (3) are provided with clamping pieces, and the clamping pieces are fixed to the steel casing (1) by welding.

6. A double-walled steel box cofferdam hoisting system according to claim 5, characterized in that: The clamping member comprises two clamping plates (42) arranged opposite to each other, a gap is left between the two clamping plates (42) to form a clamping groove, the top wall of the steel casing (1) is embedded in the clamping groove, and the clamping plates (42) are welded and fixed to the steel casing (1).

7. A double-walled steel box cofferdam hoisting system according to claim 5, characterized in that: The cantilever beam (3) is vertically supported with two guide frames (6) corresponding to the two through-hole jacks (4); the guide frames (6) include a plurality of guide plates (61); the plurality of guide plates (61) are evenly distributed along the height direction of the guide frames (6); the plurality of guide plates (61) are located above the corresponding through-hole jacks (4); and the guide plates (61) are provided with guide holes (611) for the steel strands (41) to pass through.

8. A double-walled steel box cofferdam hoisting system according to claim 2, characterized in that: The shoulder beam (51) is a double-jointed I-beam, and the webs on both sides of the shoulder beam (51) are vertically welded with a plurality of reinforcing ribs (511), and the top and bottom ends of the reinforcing ribs (511) are respectively welded and fixed to the upper wing plate and the lower wing plate of the shoulder beam (51).

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