A new cast-in-place box support device

Abstract

The present application relates to the field of bridge construction, in particular to a novel cast-in-place box support device, which comprises a bracket system module, a support suspension module, a support beam and a Bailey girder. The present application has a small terrain restriction between bridge spans, a wide application range, and does not need to excavate, fill, harden and the like for the original ground between the bridge spans. The Bailey girder needs less material than the full support and is easier to build. The components of the present application only need to be pre-installed on the bent cap, and the other parts are suspended and installed, which is convenient to install and saves the process. After the cast-in-place box girder is poured, the bracket system of the present application is easy to disassemble, which greatly improves the construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge construction, in particular to a novel cast-in-place box support device. BACKGROUND

[0002] Highway bridges are very important basic transportation infrastructure in China, and have played a very important role in the development of the economy and society, so it is necessary to take active measures to comprehensively improve the quality of the project.

[0003] China has diverse geographical environments, and highway bridges need to cross rivers, valleys, gorges and other complex terrains, so large-span bridges need to be designed and built to meet traffic demand, which requires engineers to conduct detailed investigation and analysis of geology and terrain, and to develop appropriate bridge design and construction schemes to meet the construction needs under different terrain conditions. Large-span and complex-shaped bridge construction requires appropriate construction methods and techniques according to specific circumstances. During construction, challenges such as high-altitude work, use of large lifting equipment, and construction of complex support structures need to be faced.

[0004] Cast-in-place box girder is commonly used for road overpass bridges, ramp bridges and bridges that cannot be precast. Cast-in-place box girder construction is very good for improving the stiffness of the bridge and has a very beautiful external shape, so it is widely used in bridge construction. Currently, cast-in-place box girder construction mostly uses full-frame support method. The common construction process is: (1) compacting the foundation in the construction area where full-frame supports are to be erected and ensuring that the foundation bearing capacity meets the requirements; (2) site hardening; (3) erecting full-frame supports; (4) then laying distribution beams and formwork and pre-pressing the supports; (5) carrying out girder pouring construction. Because the disc buckle full-frame support has the characteristics of easy procurement of materials and equipment, easy erection, convenient turnover, recyclable and the like, it is often used in cast-in-place box girder construction.

[0005] The full-frame support construction has the following defects: (1) in the construction of the cast-in-place box girder of the mountainous highway, the platform for erecting the full-frame support cannot be provided due to the limitation of the topography and geomorphology. If the full-frame support method is used to construct the cast-in-place box girder, the original ground needs to be leveled or filled, which greatly increases the workload and cost of the construction; (2) the foundation bearing capacity is high, especially in the soft foundation area, the construction area needs to be treated, which increases the workload and cost of the construction; (3) the construction area needs to be hardened and leveled, which increases the workload and cost of the construction; (4) for the mountainous large longitudinal slope and small radius bridge, the full-frame support is difficult to erect, the linear type is not easy to control, the support connecting rod needs to be customized, which increases the construction cost and the construction efficiency is low; (5) the safety risk is high, during the erection of the full-frame support of the cast-in-place box girder adjacent to the valley, the support is easy to overturn due to the incomplete stress system, and the safety risk of the construction is high. SUMMARY

[0006] In view of the defects in the prior art that the bridge span is limited by the terrain and the original ground between the bridge spans needs to be excavated and filled, the present application provides a novel cast-in-place box support device to overcome the above defects, and the specific technical solutions are as follows:

[0007] A novel cast-in-place box support device, comprising:

[0008] A bracket system module, comprising:

[0009] A bracket embedded part embedded on the bent cap, comprising an embedded plate covering the surface of the bent cap and a climbing cone for fixing the embedded plate;

[0010] A bracket comprising a bracket crossbar fixedly connected vertically to the embedded plate;

[0011] A support suspension module, comprising:

[0012] A suspension part comprising a carrying beam hung on the bracket crossbar;

[0013] A suspension part comprising an upper hanger and a lower hanger, the upper hanger being fixedly connected to the carrying beam through a hanger rod, and the upper hanger being fixedly connected to the lower hanger;

[0014] A support joist hung on the lower hanger, the support joist being erected with a bailey girder.

[0015] Before pouring the cast-in-place box girder, the embedded parts are strictly embedded according to the design size and spacing, and the anchoring part is reinforced, the pre-embedded plate is fixed on the bent cap by using the climbing cone, and the bracket is welded on the pre-embedded plate, wherein the bracket crossbar extends perpendicularly to the pre-embedded plate. The support suspension module is divided into two parts: a suspension part and a suspension part, the suspension part is used to hang the support suspension module on the bracket crossbar, and the suspension part is used to hang the support beam to erect the Bailey main beam, the upper hanger in the suspension part is fixedly connected with the suspension part through the suspender to fix the suspension part and the suspension part, and the lower hanger is used to hang the support beam. The support beam is perpendicular to the direction after the cast-in-place box girder is poured, so that the Bailey main beam erected on the support beam is directly applied to the pouring of the cast-in-place box girder. The invention is limited by the terrain between the bridge spans, has wide application range, does not need to excavate, fill and harden the original ground between the bridge spans, and the Bailey main beam needs less material compared with the full support frame, is easier to build, and the parts of the invention only need to be pre-embedded on the bent cap, and other parts are suspended and installed, so that the installation is convenient, the process is saved, after the cast-in-place box girder is poured, the bracket system of the scheme is easy to disassemble, and the construction efficiency is greatly improved.

[0016] Further, the suspender passes through the carrying beam and the upper hanger at both ends, and the suspender is provided with a fixed nut threadedly connected with the suspender at both ends, so that the upper hanger is hung on the carrying beam.

[0017] The suspension part and the suspension part in the support suspension module are fixedly connected through the suspender, the carrying beam in the suspension part is fixed on the bracket crossbar, the upper hanger includes an upper hanger plate, the suspender passes through the carrying beam and the upper hanger plate at both ends, and the suspender is provided with a fixed nut threadedly connected with the suspender at both ends to limit the suspender and the upper hanger, and fix the suspender and the suspension part.

[0018] Further, a pad plate for dispersing the pressure of the nut on the carrying beam is arranged between the fixed nut and the carrying beam.

[0019] The carrying beam bears the weight of the suspension part, the support beam and the Bailey main beam, and the stress is concentrated at the position where the fixed nut contacts the carrying beam, so the pad plate is arranged to disperse the pressure of the nut on the carrying beam.

[0020] Further, the upper hanger and the lower hanger are rotationally connected through a pin shaft.

[0021] The upper hanger includes two first ear plates and an upper hanger plate, and the lower hanger includes two second ear plates and a lower hanger plate, the first ear plates and the second ear plates extend oppositely, the interval between the two second ear plates is smaller than the interval between the two first ear plates, the two first ear plates and the two second ear plates are rotationally connected through the pin shaft, which is used to adjust the possibility that the surface of the support beam is not parallel to the Bailey main beam due to various factors, and the Bailey main beam is more stable and safe after being erected on the support beam.

[0022] Further, the support hanging module comprises two groups of hanging pieces and hanging pieces.

[0023] The two groups of hanging pieces and hanging pieces are connected to the same beam, and when the beam is hung on the bracket crossbar, the two groups of hanging pieces and hanging pieces are located at both ends of the bracket crossbar, so that the cooperation between the support hanging module and the embedded part is more stable and firm.

[0024] Further, the bracket further comprises a bracket inclined rod for supporting the bracket crossbar.

[0025] The bracket crossbar bears the weight of the support hanging module, the support beam and the bailey girder in the application, and the bracket crossbar is vertically extended from the embedded plate, so that the bracket inclined rod is arranged below the bracket crossbar for supporting the bracket crossbar, one end of the bracket inclined rod is fixedly connected with the embedded plate, and the other end is fixedly connected with the bracket crossbar, so that the device is more safe and stable.

[0026] Further, the connection between the bracket and the bracket embedded part and the connection between the bracket and the beam are provided with stiffening ribs for reinforcing each part of the bracket.

[0027] A plurality of stiffening ribs are arranged at each connection of the bracket system module and the connection between the bracket crossbar and the beam, and the stiffening ribs are all fully welded, so that the device is more safe and stable.

[0028] Further, the support beam is a double-spliced I-beam.

[0029] The bailey girder is arranged in the gap between a plurality of support hanging modules and the outermost side of the bailey girder, and the devices on both sides of the same bent cap are connected by a flat link to ensure that the support beams of the two devices are on the same plane.

[0030] Further, the double-spliced I-beams are provided with stiffening plates.

[0031] The support beam is welded from a double-spliced I-beam and a stiffening plate, the two I-beams are fixedly connected by a plurality of stiffening plates, the outer side groove of the two I-beams is also provided with a stiffening plate, and the two types of stiffening plates are arranged at the same position of the I-beam.

[0032] Further, steel pads are arranged on the pier for preventing the support beam from impacting the pier and the bent cap.

[0033] The application has the following beneficial effects:

[0034] (1) The novel cast-in-place box girder support provided by the application can fix and hoist the bailey girder through the embedded part, the support hanging module and the support beam, has small terrain restriction between bridge spans, has wide application range, is convenient to disassemble and assemble, and improves construction efficiency;

[0035] (2) The bracket system does not need to excavate and fill the original ground for hardening and other pretreatment, and the removal after the cast-in-place box girder pouring is simpler, reducing the labor cost, and the bailey main beam needs less material than the full support, which is more economical. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 : Embodiment adopts the bracket device of the present application to construct the vertical surface of the cast-in-place box.

[0037] Figure 2 : Embodiment adopts the bracket device of the present application to construct the cross section of the cast-in-place box.

[0038] Figure 3 : Embodiment adopts the bracket device of the present application to construct the cross section of the cast-in-place box.

[0039] Figure 4 : Embodiment adopts the bracket device of the present application to construct the cross section of the cast-in-place box.

[0040] Figure 5 : Embodiment adopts the bracket device of the present application to construct the cross section of the cast-in-place box.

[0041] Figure 6 : Embodiment adopts the bracket device of the present application to construct the cross section of the cast-in-place box.

[0042] Figure 7 : Embodiment adopts the bracket device of the present application to construct the cross section of the cast-in-place box.

[0043] Wherein: 01 cast-in-place box girder, 02 cap beam, 03 pier, 1 bracket system module, 11 bracket pre-embedded part, 111 pre-embedded plate, 112 climbing cone, 12 bracket, 121 bracket cross bar, 122 bracket inclined bar, 123 stiffening rib, 2 bracket suspension module, 21 suspension part, 211 carrying beam, 22 suspension part, 221 upper hanger, 2211 first ear plate, 2212 upper hanger plate, 222 lower hanger, 2221 second ear plate, 2222 lower hanger plate, 223 pin shaft, 23 hanger bar, 231 fixed nut, 232 pad, 3 bracket support beam, 31 double-spliced I-beam, 311 stiffening plate, 32 steel pad, 4 bailey main beam. DETAILED DESCRIPTION

[0044] The present application will be further described below in conjunction with specific embodiments. Those skilled in the art will be able to implement the present application based on these descriptions. In addition, the embodiments of the present application involved in the following description are generally only a part of the embodiments of the present application, not all the embodiments. Therefore, based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor shall fall within the scope of protection of the present application.

[0045] In the following description, the appearance of terms such as "inner", "outer", "upper", "lower", "left", "right", and the like, indicate relative positions or orientation only for the purpose of convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] Before describing the embodiments of the present scheme in detail, the environment to which the present scheme is applied is introduced: in bridge construction, the beam structure located at the top of the bridge span pile and used for supporting, distributing and transferring the load of the upper structure is called the bent cap 02.

[0047] As shown in Figure 1 , 2 , the present embodiment provides a new type of cast-in-place box support device, which comprises a bracket system module 1, a support suspension module 2, a support joist 3 and a Bailey main beam 4. The present embodiment has small restrictions on the terrain between bridge spans, has wide application range, does not need to excavate, fill and harden the original ground between the bridge spans, and the Bailey main beam 4 needs less materials and is easier to build compared with full-frame support. The components of the present application only need to be pre-installed on the bent cap 02, and the other parts are all suspended and installed, which is convenient to install, saves process, the bracket 12 system of the present scheme is easy to remove after the cast-in-place box beam 01 is poured, which greatly improves the construction efficiency.

[0048] As shown in Figure 3 , 4As shown, the bracket system module 1 includes a bracket embedded part 11 embedded in the bent cap 02, which includes an embedded plate 111 covering the surface of the bent cap 02 and a climbing cone 112 for fixing the embedded plate 111. The embedded plate 111 is a Q235B steel plate with a size of 400x900mm and a thickness of 10mm. The climbing cone 112 is a M42-D26.5 type, and the anchoring depth of the climbing cone 112 is not less than 400mm. Before pouring the bent cap 02, the embedded part is embedded and the anchoring part is reinforced according to the design size and spacing. Ensure that the position of the embedded part does not change during pouring. The bracket 12 includes a bracket crossbar 121 fixedly connected to the embedded plate 111 vertically. The bracket crossbar 121 bears the weight of the support suspension module 2, the support joist 3, and the Bailey girder 4 in this embodiment. Since the bracket crossbar 121 is vertically extended from the embedded plate 111, a bracket inclined rod 122 is arranged below the bracket crossbar 121 to support the bracket crossbar 121. One end of the bracket inclined rod 122 is fixedly connected to the embedded plate 111, and the other end is fixedly connected to the bracket crossbar 121, so that the device is more secure and stable. The connection between the bracket 12 and the bracket embedded part 11 and the connection between the bracket 12 and the flat beam 211 are provided with stiffening ribs 123 for reinforcing each part of the bracket 12. The stiffening ribs 123 are all fully welded around, so that the device is more secure and stable. The specification of the bracket crossbar 121 is 2[20a x 600mm. The specification of the bracket inclined rod 122 is 2[20a x 766mm. The end plate is made of a Q235B steel plate with a thickness of 20mm and an outer dimension of 400x900mm. The stiffening plate 311 is made of a Q235B steel plate with a thickness of 10mm. The connection between the bracket 12 and the end plate and the connection between the stiffening plate 311 and the bracket crossbar 121 are all fully welded around with a weld leg size of 8mm. The welding between the stiffening plate 311 and the end plate and the bracket 12 is all double-sided welding with a weld leg size of 8mm.

[0049] As Figure 5 , 6As shown, the bracket suspension module 2 comprises a hanging piece 21 and a suspension piece 22. The hanging piece 21 comprises a pole beam 211, which is hung on the bracket crossbar 121. The pole beam 211 is welded by 2[20a x 500mm. The suspension piece 22 comprises an upper hanger 221 and a lower hanger 222. The upper hanger 221 comprises two first ear plates 2211 and an upper hanger plate 2212. The lower hanger 222 comprises two second ear plates 2221 and a lower hanger plate 2222. The first ear plate 2211 and the second ear plate 2221 extend oppositely. The interval of the second ear plate 2221 is smaller than that of the first ear plate 2211. The first ear plate 2211 and the second ear plate 2221 are rotationally connected by a pin shaft 223, which is used to adjust the possibility that the surface of the bracket joist 3 is not parallel to the Bailey girder 4 due to various factors. The Bailey girder 4 is more stable and safe after being erected on the bracket joist 3. The upper hanger 221 is fixedly connected with the pole beam 211 by a suspender 23. The suspender 23 is a Φ32 precision rolled threaded steel. The upper hanger 221 and the lower hanger 222 are fixedly connected. The suspender 23 passes through the pole beam 211 and the upper hanger plate 2212 at both ends, and both ends are provided with fixed nuts 231 which are threadedly connected with the suspender 23, so that the upper hanger 221 is hung on the pole beam 211. A pad 232 is arranged between the fixed nut 231 and the pole beam 211 to disperse the pressure of the nut on the pole beam 211. The upper hanger 221 and the lower hanger 222 are rotationally connected by the pin shaft 223. The bracket suspension module 2 comprises two groups of hanging pieces 21 and suspension pieces 22, which are connected on the same pole beam 211. When the pole beam 211 is hung on the bracket crossbar 121, the two groups of hanging pieces 21 and suspension pieces 22 are located at both ends of the bracket crossbar 121, so that the cooperation between the bracket suspension module 2 and the embedded part is more stable and firm.

[0050] As shown in Figure 7 , the bracket joist 3 is hung on the lower hanger 222, and the Bailey girder 4 is erected on the bracket joist 3. It is arranged in the gap of multiple bracket suspension modules 2 and the outermost side. The devices on both sides of the same cover beam 02 are connected by a flat link to ensure that the bracket joists 3 of the two devices are on the same plane. The bracket joist 3 is welded by double-spliced I-shaped steel 31 and stiffener 311. The two I-shaped steels are fixedly connected by multiple stiffeners 311. The outer side groove of the two I-shaped steels is also provided with a stiffener 311. The two types of stiffeners 311 are arranged at the same position of the I-shaped steel. The bracket main body adopts I40a double-spliced I-shaped steel 31, and the stiffener 311 is processed from a steel plate with a thickness of 10mm. The bracket specification is 2I40a x 7000mm. The specifications of the stiffeners 311 are 378 x 66 x 10mm and 378 x 332 x 10mm respectively. Figure 1 As shown in Figure 1 , the pier 03 is provided with a steel pad 32 for preventing the bracket joist 3 from impacting the pier 03 and the cover beam 02.

[0051] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and those skilled in the art should understand that the present application includes but is not limited to the contents described in the above specific embodiments and the drawings. Any modification not deviating from the functional and structural principles of the present application shall be included in the scope of the claims.

Claims

1. A novel cast-in-place caisson support device, characterized in that: include: Bracket system module (1), including: The bracket embedded part (11) is embedded in the cap beam, which includes an embedded plate (111) covering the surface of the cap beam and a climbing cone (112) for fixing the embedded plate (111). The bracket (12) includes a bracket crossbar (121), which is vertically fixed to the embedded plate (111); The bracket suspension module (2) includes: The suspension component (21) includes a spreader beam (211) which is suspended on a bracket crossbar (121); The suspension component (22) includes an upper suspension frame (221) and a lower suspension frame (222). The upper suspension frame (221) is fixedly connected to the spreader beam (211) via a suspension rod (23), and the upper suspension frame (221) and the lower suspension frame (222) are fixedly connected. The support beam (3) is suspended on the lower hanger (222), and the support beam (3) supports the Bailey main beam (4). The two ends of the boom (23) pass through the spreader beam (211) and the upper hanger (221) respectively. Both ends are provided with fixing nuts (231) that are threadedly connected to the boom (23), so that the upper hanger (221) is suspended on the spreader beam (211); The upper hanger (221) includes a first ear plate (2211) and an upper hanging plate (2212), and the hanging rod (23) passes through the upper hanging plate (2212) and is fixedly connected to the upper hanger; The lower hanger (222) includes a second ear plate (2221) and a lower hanging plate (2222), wherein the second ear plate (2221) and the first ear plate (2211) are rotatably connected by a pin (223); The bracket suspension module (2) includes two sets of suspension components (21) and suspension components (22); the two sets of suspension components (21) and suspension components (22) are connected to the same flat beam (211). When the flat beam (211) is hung on the bracket crossbar (121), the two sets of suspension components (21) and suspension components (22) are located at both ends of the bracket crossbar (121).

2. The novel cast-in-place caisson support device according to claim 1, characterized in that: A pad (232) is provided between the fixing nut (231) and the spreader beam (211) to distribute the pressure of the fixing nut (231) on the spreader beam (211).

3. The novel cast-in-place box support device according to claim 1, characterized in that: The bracket (12) also includes a bracket diagonal bar (122) for supporting the bracket crossbar (121).

4. The novel cast-in-place box support device according to claim 1, characterized in that: The connection between the bracket (12) and the bracket embedded part (11), and the connection between the bracket (12) and the spreader beam (211) are provided with stiffening ribs (123) for reinforcing the bracket (12).

5. A novel cast-in-place caisson support device according to claim 4, characterized in that: The support beam (3) is a double-I-beam (31), and a stiffening plate (311) is provided between the double-I-beams (31).

6. A novel cast-in-place caisson support device according to claim 1 or 4, characterized in that: The cap beam is equipped with steel pads (32) to prevent the support beam (3) from impacting the cap beam and the pier.

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