Auxiliary construction platform for T-shaped rigid frame bridge demolition construction

Abstract

The utility model discloses an auxiliary construction platform for dismantling construction of a T-shaped rigid frame bridge, the T-shaped rigid frame bridge is provided with a bridge main body and a plurality of bridge piers, and the auxiliary construction platform comprises a platform body which is used for blocking and protecting the bottom of the bridge main body and can be used for traveling. The platform body is arranged in the length direction of the bridge body and located under the bridge body, and the edges of the two transverse sides of the platform body outwards exceed the edges of the corresponding sides of the bridge body by a set distance. The auxiliary construction platform further comprises towers correspondingly arranged over the piers, and the towers are connected with the platform body through stay cables. According to the auxiliary construction platform, the navigation requirement of the bridge bottom can be met, meanwhile, the influence on a riverway water area is small, the influence on the surrounding environment and the dependence on the surrounding environment are small, and the demolition construction efficiency of the bridge can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction technical field, concretely relates to a kind of auxiliary construction platform for T rigid frame bridge demolition construction. BACKGROUND

[0002] T rigid frame bridge is a kind of beam bridge with cantilever stress characteristics, because pier is on both sides to stretch cantilever, similar to T character, so called this name. Part of bridge needs to be demolished due to quality defects, change of use function, and road network re-planning and other reasons. Wire saw cutting segmented demolition bridge does not produce dust, noise is small, and has little influence on surrounding environment, is the common demolition means used in urban bridge demolition construction. However, the current river-crossing T rigid frame bridge wire saw cutting is generally completed by cutting construction and transportation through ship crane cooperation, since it is inevitable that there will be broken stone block falling during cutting demolition construction process, for the bridge with navigation demand at bridge bottom, cannot guarantee navigation safety. At the same time, the transportation efficiency of ship crane transfer mode is low, especially for some large-span bridge. In addition, sewage in wire saw cutting process will be directly discharged into river, which will affect river environment. Therefore, it is necessary to provide an auxiliary device suitable for river-crossing type T rigid frame bridge demolition construction, so as to facilitate to guarantee the navigation demand at bridge bottom, reduce the water pollution of river, and facilitate to improve construction efficiency. SUMMARY

[0003] Therefore, the utility model aims at providing a kind of auxiliary construction platform for T rigid frame bridge demolition construction, by using the auxiliary construction platform, it can facilitate to guarantee the navigation demand at bridge bottom, reduce the water pollution of river, and facilitate to improve construction efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an auxiliary construction platform for T rigid frame bridge demolition construction, the T rigid frame bridge has a bridge main body and a plurality of bridge piers, the auxiliary construction platform includes a platform body for forming a retaining and being used for driving on the bottom of the bridge main body, the platform body is arranged along the length direction of the bridge main body and located directly below the bridge main body, and the lateral edges of the platform body respectively exceed the corresponding side edges of the bridge main body by a certain distance; the auxiliary construction platform further includes a tower arranged above each bridge pier, and the tower is connected with the platform body by a diagonal cable.

[0005] Further, a bridge pier hoop is arranged on each bridge pier, a platform support part for supporting the platform body is arranged on the bridge pier hoop, and the platform body is supported and fixed on the platform support part.

[0006] Further, the platform body comprises two sets of longitudinal main beams, a plurality of support cross beams arranged on top of the two sets of longitudinal main beams, and a platform panel fixedly arranged on top of the support cross beams and forming a road surface, the longitudinal main beams are fixedly arranged on the platform support part at the pier part, and the diagonal cables are fixedly connected with the longitudinal main beams.

[0007] Further, the platform support part comprises two sets of bottom support beams fixedly arranged on top of the pier hoops, and the two sets of bottom support beams are respectively arranged on two sides of the pier in the length direction of the bridge body, and the length of the bottom support beam is equal to the width of the platform body.

[0008] Further, the longitudinal main beam is a BEAR frame formed by splicing.

[0009] Further, the support cross beam is an I-beam.

[0010] Further, the platform panel is a steel plate.

[0011] Further, hard guardrails are fixedly arranged on the two lateral edges of the platform body in the transverse direction.

[0012] Further, drainage grooves are arranged on the two lateral edges of the platform body in the transverse direction.

[0013] Compared with the prior art, the auxiliary construction platform for T-shaped rigid frame bridge demolition construction has the following beneficial effects:

[0014] The auxiliary construction platform for T-shaped rigid frame bridge demolition construction can guarantee the navigation requirement of the bridge bottom, has little influence on the river area, has little influence on the surrounding environment and has small endurance, and can improve the demolition construction efficiency of the bridge; specifically, the auxiliary construction platform can form effective protection for the bridge bottom, avoids the risk that solid and liquid wastes fall into the river channel during the cutting construction process, and thus does not affect the navigation requirement of the bridge bottom in the construction stage, and guarantees the navigation safety; the tower and the diagonal cable can effectively guarantee the bearing strength of the platform body, guarantee the platform driving requirement, the cutting block cut from the bridge body can be quickly transported away by the transport vehicle on the auxiliary construction platform, and compared with the traditional ship crane transportation, the overall cutting construction efficiency can be effectively improved; the tower is arranged directly above each pier and does not affect the normal cutting of the bridge body, and the cutting of the bridge body does not affect the structural stability of the overall structure; meanwhile, the support foundation of the auxiliary construction platform does not need to be constructed in the river channel, the construction efficiency of the auxiliary construction platform can be guaranteed, and the solid and liquid wastes falling on the top surface of the platform body during the cutting construction process can be conveniently collected and treated, and the river area is not polluted, and the influence on the river area is small; the auxiliary construction platform is particularly suitable for the construction of a large-span T-shaped rigid frame bridge crossing a river in a city, and is especially suitable for the construction scheme of the rope saw cutting.

[0015] The other advantages, objects, and features of the present application will become more apparent in light of the following detailed description of the application. As will be realized, the application is capable of other different and obvious applications, all without departing from the application. Accordingly, the drawings and descriptions should be regarded as illustrative in nature and not restrictive. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of an embodiment of the present application

[0017] Figure 2 It is a cross-sectional structural schematic diagram of an embodiment of the present application

[0018] Figure 3 It is a front view partial structural schematic diagram of an embodiment of the present application

[0019] Figure 4 It is an isometric structural schematic diagram of an embodiment of the present application

[0020] Signs: 1-bridge main body; 2-pier; 3-platform body; 301-longitudinal main beam; 302-supporting cross beam; 303-platform panel; 4-tower; 401-inclined cable; 5-pier hoop; 501-platform supporting part; 501a-bottom supporting beam; 6-hard guardrail; 7-drainage groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. It should be noted that the drawings are only used for illustrative description, and represent only schematic diagrams, not physical diagrams, and should not be understood as a limitation of the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the following, unless otherwise specified, the transverse direction refers to the width direction of the bridge main body, and the longitudinal direction refers to the length direction of the bridge main body.

[0023] Please refer to Figures 1-4The embodiment discloses an auxiliary construction platform for T-shaped rigid frame bridge demolition construction, the T-shaped rigid frame bridge is provided with a bridge main body 1 and a plurality of bridge piers 2, the auxiliary construction platform comprises a platform body 3 used for forming a fender (that is, shielding the bottom of the bridge main body 1) on the bottom of the bridge main body 1 and used for driving, the platform body 3 is arranged along the length direction of the bridge main body 1 and located directly below the bridge main body 1, and the lateral two side edges of the platform body 3 respectively extend outward beyond the corresponding side edges of the bridge main body 1 by a set distance, that is, the width of the platform body 3 is greater than the width of the bridge main body 1; it can be understood that the value of the set distance needs to at least ensure the passing property of the transfer vehicle at the bridge pier 2; by arranging the wider platform body 3, the bottom of the bridge main body 1 is effectively protected; the auxiliary construction platform further comprises a tower 4 arranged above each bridge pier 2, the tower 4 is connected with the platform body through a diagonal cable 401, and the bearing capacity of the platform body 3 can be effectively ensured by arranging the tower 4 and the diagonal cable 401, so that the driving and carrying function of the platform body 3 is ensured; of course, it can be understood that the two longitudinal ends of the platform body 3 can be arranged on the support foundation of the bridgehead construction; the auxiliary construction platform for the demolition construction of the T-shaped rigid frame bridge across the river provided in the above can ensure the navigation requirement of the bridge bottom, has little influence on the river water area, has little influence on the surrounding environment and endurance, and can improve the demolition construction efficiency of the bridge; specifically, the auxiliary construction platform arranged in advance can form effective protection for the bridge bottom, avoid the risk that solid and liquid wastes fall into the river channel in the cutting construction process, so that the navigation requirement of the bridge bottom in the construction stage is not affected, and the navigation safety is ensured; the bearing strength of the platform body 3 can be effectively ensured by arranging the tower 4 and the diagonal cable 401, the driving requirement of the platform is ensured, the cutting block cut from the bridge main body 1 can be quickly transported away on the auxiliary construction platform by using the transport vehicle, the overall cutting construction efficiency is effectively improved compared with the traditional ship crane transfer, the tower 4 arranged above each bridge pier 2 does not affect the normal cutting of the bridge main body 1, and the structure stability of the overall structure is not affected after the bridge main body 1 is cut; at the same time, the support foundation of the auxiliary construction platform does not need to be constructed in the river channel, the construction efficiency of the auxiliary construction platform can be ensured, the solid and liquid wastes falling on the top surface of the platform body 3 in the cutting construction process can be beneficially collected and concentrated for treatment, and the river water area is not polluted, so the influence on the river water area is small; the auxiliary construction platform is particularly suitable for the construction of a large-span T-shaped rigid frame bridge across the river in a city, especially the construction scheme using a rope saw cutting; of course, the auxiliary construction platform arranged can be used as a construction temporary facility and material (an air compressor, an electrical box, a working tool, a small amount of raw materials and the like) stacking, and the construction convenience is improved.

[0024] In the embodiment, the pier 2 is provided with a pier hoop 5, the pier hoop 5 is provided with a platform support part 501 for supporting the platform body 3, and the platform body 3 is supported and fixed on the platform support part 501; here, the pier hoop 5 is a steel pier hoop in the prior art, and a pier hoop with a corresponding specification is selected according to the bearing capacity, strength requirement and pier size; the platform support part 501 is generally a support beam; the platform support part 501 can be an integral structure with the pier hoop, and of course the platform support part 501 can also be a welded fixed structure with the pier hoop; the platform body 3 can be welded and fixed with the platform support part 501; the pier hoop 5 is arranged at the position of the pier 2, which is beneficial to further enhancing the structural stability and bearing capacity of the platform body 3, thereby further improving the construction safety.

[0025] In the embodiment, the platform body 3 includes two groups of longitudinal main beams 301, a plurality of support cross beams 302 arranged on the top of the two groups of longitudinal main beams 301, and a platform panel 303 fixedly laid on the top of the support cross beams 302 and forming a road surface, the longitudinal main beams 301 are fixedly arranged on the platform support part 501 at the position of the pier 2, and the diagonal cable 401 is fixedly connected with the longitudinal main beam 301; it can be understood that the diagonal cable 401 is arranged in multiple, and the specific mounting and connecting mode of the diagonal cable 401 is the prior art, which will not be described here; the platform body 3 in the structural design has simple structure, good strength and good bearing capacity, which is beneficial to ensuring the use safety and construction convenience.

[0026] In the embodiment, the platform support part 501 includes two groups of bottom support beams 501a fixedly arranged on the top of the pier hoop 5, and the two groups of bottom support beams 501a are respectively located on the two sides of the pier 2 in the length direction of the bridge main body 1, and the length of the bottom support beam 501a is equal to the width of the platform body 1; here, the support beam 501a is an I-beam, which is welded and fixed with the pier hoop 5; the platform support part 501 in the structural design has simple structure, good support effect on the platform body 1, and is beneficial to further improving the structural stability and use safety of the platform body 1.

[0027] In the embodiment, the longitudinal main beam 301 is a spliced Bailey frame, the Bailey frame is a steel frame with certain units, has the characteristics of simple structure, convenient transportation, rapid erection and easy disassembly, and has the advantages of large bearing capacity, strong structural rigidity and long fatigue life; the longitudinal main beam 301 spliced by the Bailey frame has good construction convenience, large bearing capacity and strong structural rigidity.

[0028] In the embodiment, the support cross beam 302 is an I-beam, and the I-beams are arranged at intervals; the I-beam has good bearing capacity, which is beneficial to ensuring the use stability and safety of the platform body.

[0029] In the embodiment, the platform panel 303 is a steel plate, and the platform panel 303 is spliced by multiple steel plates during laying, and the joints can be simply sealed by waterproof glue; the steel plate is used as the panel, and the bearing capacity is good, and the use stability and safety of the platform body can be ensured.

[0030] In the embodiment, the platform body 3 is provided with a hard guardrail 6 such as a steel pipe fence at the lateral two side edges, and the hard guardrail 6 can form a protection for the platform body, and the construction safety can be further improved.

[0031] In the embodiment, the platform body 3 is provided with a drainage groove 7 at the lateral two side edges, and the drainage groove 7 is integrated on the platform panel 303. The sewage generated in the cutting construction can be drained to the set sewage treatment equipment through the drainage groove 7, and then discharged after treatment, and the sewage can be collected and discharged.

[0032] In the embodiment, the demolition construction of the T-shaped rigid frame bridge can adopt a rope saw cutting construction scheme, and an auxiliary construction platform is erected in advance before the cutting construction, and the auxiliary construction platform comprises the following components.

[0033] In the structure design, the platform body 3 can be constructed according to the following process: constructing the tower 4, the tower 4 adopts a steel column + truss form; installing the inclined cable 401, the inclined cable 401 generally adopts a closed steel cable or a solid steel bar; installing and reinforcing the longitudinal main beam 301 of the auxiliary construction platform, the longitudinal main beam 301 is connected with the inclined cable 401 stably, and the longitudinal main beam 301 adopts a Bailey frame structure; when the longitudinal main beam 301 passes through the pier 2, the pier 2 is attached by the pier hoop 5 to enhance the stability; installing and reinforcing the support cross beam 302 of the auxiliary construction platform, the support cross beam 302 adopts an I-beam; laying the platform panel 303, the platform panel 303 adopts a steel plate; installing and reinforcing the hard guardrails 6 on the two sides; pre-pressing and checking the auxiliary construction platform.

[0034] The rope saw cutting can be implemented in the following steps: S1: site survey and cutting marking, specifically including: understanding the specific structural form of the bridge, such as the materials and structure of the main beam, bridge pier, bridge deck pavement and other parts; investigating the use history, maintenance record and current condition of the bridge, and formulating a cutting route suitable for the current bridge, etc. This part is consistent with the existing bridge rope saw cutting pre-survey marking process, and will not be repeated here; S2: hoisting equipment preparation, cutting equipment preparation, and transfer vehicle preparation, wherein the transfer vehicle is located on the platform body 3, specifically, the hoisting equipment can be selected as a ship crane, or an automobile crane arranged on the platform body 3, or a gantry erected on the bridge body 1, etc., and the cutting equipment is generally selected as a diamond rope saw. Before cutting, the stability of the cutting block hoisting is ensured to ensure the safety of construction; after the cutting block is cut off, it can be directly hoisted and dropped onto the transport vehicle on the platform body 3, and then transported by the transport vehicle, without affecting the subsequent construction; here, the hoisting equipment preparation and cutting equipment preparation can be consistent with the existing rope saw cutting equipment preparation process, and will not be repeated here; S3: sequentially completing the cutting of the bridge body 1 according to the cutting marking, wherein the cutting block cut each time is hoisted to the transfer vehicle by the hoisting equipment; the cutting process can be consistent with the existing cutting process, except that in the present scheme, the cutting block after cutting can be directly transported by the transfer vehicle on the platform body 3, greatly improving the transportation efficiency and safety, thereby facilitating the improvement of the overall construction progress.

[0035] The above-mentioned auxiliary construction platform can also be analogously applied to the construction of a T-shaped rigid frame bridge. During construction, the bridge piers can be constructed first, and then the above-mentioned auxiliary construction platform can be erected on the bridge piers. After the formation of the auxiliary construction platform, effective protection of the bridge bottom can be formed, and the construction safety can be improved. Similarly, the auxiliary construction platform in the present application can also be used for the demolition or construction of a T-shaped rigid frame bridge across a river or a valley.

[0036] Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the utility model technical scheme, and all should be covered in the scope of the claims of the utility model.

Claims

1. An auxiliary construction platform for T-frame bridge demolition construction, characterized by: The T-shaped rigid frame bridge has a bridge main body (1) and a plurality of piers (2), the auxiliary construction platform comprises a platform body (3) for forming a retaining and driving platform at the bottom of the bridge main body (1), the platform body (3) is arranged along the length direction of the bridge main body (1) and located directly below the bridge main body (1), and the lateral edges of the platform body (3) are respectively outwardly beyond the corresponding side edges of the bridge main body (1) by a certain distance; the auxiliary construction platform further comprises a tower (4) arranged above each pier (2), and the tower (4) is connected with the platform body by a diagonal cable (401).

2. The auxiliary construction platform for T-frame bridge demolition construction according to claim 1, characterized in that: Each pier (2) is provided with a pier hoop (5), and the pier hoop (5) is provided with a platform support portion (501) for supporting the platform body (3), and the platform body (3) is supported and fixed on the platform support portion (501).

3. The auxiliary construction platform for T-frame bridge demolition construction according to claim 2, characterized in that: The platform body (3) comprises two groups of longitudinal main beams (301), a plurality of support cross beams (302) arranged on the top of the two groups of longitudinal main beams (301), and a platform panel (303) fixedly laid on the top of the support cross beams (302) and forming a road surface, the longitudinal main beams (301) are fixedly arranged on the platform support portion (501) at the pier (2) portion, and the diagonal cable (401) is fixedly connected with the longitudinal main beams (301).

4. The auxiliary construction platform for T-frame bridge demolition construction according to claim 2, characterized in that: The platform support portion (501) comprises two groups of bottom support beams (501a) fixedly arranged on the top of the pier hoop (5), and the two groups of bottom support beams (501a) are respectively located on the two sides of the pier (2) in the length direction of the bridge main body (1), and the length of the bottom support beam (501a) is equal to the width of the platform body (3).

5. The auxiliary construction platform for T-frame bridge demolition construction according to claim 3, characterized in that: The longitudinal main beam (301) is a spliced Bailey frame.

6. The auxiliary construction platform for T-frame bridge demolition construction according to claim 3, characterized in that: The support cross beam (302) is an I-beam.

7. The auxiliary construction platform for T-frame bridge demolition construction according to claim 3, characterized in that: The platform panel (303) is a steel plate.

8. The auxiliary construction platform for T-frame bridge demolition construction according to claim 1, characterized in that: Hard railings (6) are fixedly arranged on the lateral edges of the platform body (3).

9. The auxiliary construction platform for T-frame bridge demolition construction according to claim 1, characterized in that: Drainage grooves (7) are arranged on the lateral edges of the platform body (3).

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