Temporary consolidation device for continuous beam zero block and main pier and construction method of temporary consolidation device

Abstract

The invention relates to a temporary consolidation device for a continuous beam zero block and a main pier and a construction method of the temporary consolidation device. The temporary consolidation device is used for connecting the main pier and the zero block above the main pier. Comprising a temporary concrete buttress and a floor type steel pipe cylinder temporary support, the temporary concrete buttress is arranged at the top of a main pier and supports the bottom of a zero block, and threaded steel bars which are vertically arranged and embedded in the zero block and the main pier respectively are embedded in the temporary concrete buttress; at least one temporary concrete buttress is arranged on each of the left and right sides of the top of the main pier; the left side and the right side of the main pier are each provided with a floor type steel pipe cylinder temporary support, each floor type steel pipe cylinder temporary support comprises at least one steel pipe and a temporary supporting frame, the steel pipes are vertically arranged, the bottoms of the steel pipes are fixed, the tops of the steel pipes are connected with temporary anchoring steel bars, and the upper half sections of the temporary anchoring steel bars are embedded in the zero block; the temporary supporting frame is connected to the side wall of the steel pipe and the side wall of the main pier and is supported at the bottom of the zero block.

Description

Technical Field

[0001] The present invention relates to the technical field related to continuous beam construction, and in particular to a temporary consolidation device for a continuous beam No. 0 block and a main bridge pier and a construction method thereof. Background Art

[0002] With the rapid development of transportation infrastructure construction such as highways and municipal facilities, continuous beam bridges are widely used due to their strong spanning capacity, stable structure, fast construction speed, beautiful structure, and low economic cost. In the construction process of continuous beam bridges, the temporary consolidation technology of block zero is particularly important as the starting point of cantilever construction. The main purpose of temporary consolidation is to resist unbalanced force arms and withstand vertical reaction forces during construction. How to ensure the stability of the bridge structure and construction safety, the temporary consolidation construction of block zero is a difficult problem. Summary of the invention

[0003] In order to solve one or more technical problems existing in the prior art, the present invention provides a temporary consolidation device for a continuous beam block No. 0 and a main bridge pier and a construction method thereof.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a temporary consolidation device for a continuous beam No. 0 block and a main bridge pier, which is used to connect the main bridge pier and the No. 0 block above the main bridge pier; it includes a temporary concrete pier and a ground-type steel pipe tube temporary bracket, the temporary concrete pier is arranged on the top of the main bridge pier and supports the bottom of the No. 0 block, the temporary concrete pier is embedded with threaded steel bars that are vertically arranged and respectively embedded in the No. 0 block and the main bridge pier, and at least one temporary concrete pier is provided on the left and right sides of the top of the main bridge pier; a ground-type steel pipe tube temporary bracket is provided on the left and right sides of the main bridge pier, the ground-type steel pipe tube temporary bracket includes at least one steel pipe and a temporary support frame, the steel pipe is vertically arranged and fixed at the bottom, the top of the steel pipe is connected to a temporary anchoring steel bar, the upper half of the temporary anchoring steel bar is embedded in the No. 0 block, and the temporary support frame is connected to the side wall of the steel pipe and the side wall of the main bridge pier and supported on the bottom of the No. 0 block.

[0005] The beneficial effects of the present invention are as follows: the temporary consolidation device of the present invention is used to rigidly connect the zero-block beam section with the bridge pier through temporary consolidation during the cantilever casting process, thereby preventing the zero-block beam section from being displaced or deformed during the cantilever casting process, thereby ensuring the overall stability of the bridge structure and construction safety. The present invention optimizes the structural form and reduces the weight of the bracket through structural force modeling analysis, thereby achieving the effects of light weight, high efficiency, safety, and convenient installation and disassembly.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, at least two rows of threaded steel bars are embedded in the temporary concrete pier, and each row of threaded steel bars includes a plurality of threaded steel bars spaced apart from each other in the front and back; and a plurality of transverse stirrups spaced apart from each other in the upper and lower directions are also embedded in the temporary concrete pier.

[0008] The beneficial effect of adopting the above further solution is that by providing at least two rows of threaded steel bars and a plurality of transverse stirrups, the structural strength and stability of the temporary concrete pier are improved.

[0009] Furthermore, a transversely arranged steel mesh is tied to the threaded steel bars embedded in the No. 0 block, and the steel mesh is embedded in the No. 0 block.

[0010] Furthermore, bracket embedded parts and buttress embedded parts are provided on the outer side wall of the main pier, and the ground-type steel pipe tube temporary support includes two steel pipes and a temporary support frame; the temporary support frame includes a bracket, a buttress and a rack, and each steel pipe is provided with a bracket support plate, the bracket is arranged on the bracket support plates of the two steel pipes and is fixedly connected to the bracket embedded parts, one end of the buttress is fixed on the steel pipe, and the other end is fixed on the buttress embedded part; the rack is installed on the bracket and supported on the top of the zero block.

[0011] The beneficial effect of adopting the above further solution is that by providing bracket embedded parts and supporting wall embedded parts, the steel pipe and the bracket can be effectively and stably supported and connected.

[0012] Furthermore, the bracket is extended left and right, and a plurality of beams extending front and back are provided on the bracket. The rack is extended along the left and right directions, and there are a plurality of racks which are arranged in sequence and spaced apart along the front and back directions.

[0013] Furthermore, concrete is poured in the steel pipe, and the lower half of the temporary anchoring steel bar is pre-buried in the concrete of the steel pipe.

[0014] Furthermore, a column foot embedded part is fixed to the bottom of the steel pipe.

[0015] Furthermore, two temporary concrete buttresses are respectively arranged on the left and right sides of the top of the main pier, and the two temporary concrete buttresses on the left and the two temporary concrete buttresses on the right are arranged one by one in the left-right direction.

[0016] Furthermore, a steel pipe is provided on each of the left and right sides of a corresponding group of temporary concrete piers.

[0017] A construction method for a temporary consolidation device for the continuous beam block No. 0 and the main bridge pier comprises the following steps:

[0018] S1, first construct the main bridge pier, embed threaded steel bars on the top of the main bridge pier, tie transverse stirrups on the threaded steel bars and make a temporary pier template, pour concrete in the temporary pier template to form a temporary concrete pier, and the upper end of the threaded steel bars partially protrudes from the temporary concrete pier;

[0019] S2, fix the bottom of the steel pipe and connect the temporary anchor steel bars on the top;

[0020] S3, erecting a temporary support frame, and connecting the temporary support frame to the side wall of the steel pipe and the side wall of the main bridge pier respectively;

[0021] S4, set up the No. 0 block formwork and cast to form the No. 0 block, so that the upper end of the threaded steel bar and the upper half of the temporary anchor steel bar are buried in the No. 0 block.

[0022] The beneficial effects of the present invention are as follows: the construction method of the present invention adopts a temporary consolidation structure of an internal fine-rolled threaded steel concrete pier (temporary concrete pier) + an external ground-type steel pipe core tube support (ground-type steel pipe tube temporary support), which can well solve the characteristics of unbalanced force of continuous beams, ensure the construction safety of the No. 0 block, improve the construction quality, and speed up the construction progress.

[0023] Temporary consolidation of the continuous beam zero block has many beneficial effects in bridge construction, including enhancing structural stability, improving construction safety, facilitating construction control, facilitating system conversion, and bringing significant economic benefits. These effects together ensure the smooth progress of the bridge construction process and reliable guarantee of the final quality. The specific effects are as follows:

[0024] 1. Enhanced structural stability. The temporary consolidation device rigidly connects the main pier and the zero block during cantilever casting, significantly enhancing the overall stability of the structure. This rigid connection can withstand the unbalanced bending moment or torque that may occur during the construction process, ensuring the safety of the bridge during the construction phase.

[0025] 2. Improved construction safety. Temporary consolidation can effectively control the deformation and displacement of the bridge during construction, thereby reducing construction risks. In addition, it can provide a more stable and safe working environment for construction workers, helping to improve construction efficiency and quality.

[0026] 3. Convenient for construction control. The setting of temporary consolidation enables the various loads and deformations in the construction process to be more effectively controlled and managed. This helps construction personnel to more accurately grasp the construction status of the bridge, find problems in time and take corresponding adjustment measures to ensure the smooth progress of the construction process.

[0027] 4. It is conducive to system conversion. During the bridge construction process, temporary consolidation can be used as a transition structure for the bridge system conversion. As the construction progresses, when the bridge gradually forms a permanent structure, the temporary consolidation can be easily removed or converted, allowing the bridge to smoothly transition to its final stress state.

[0028] 5. Significant economic benefits. Although temporary consolidation requires certain materials and construction costs, its role in improving construction efficiency, reducing construction risks and ensuring bridge quality cannot be ignored. Therefore, in the long run, the setting of temporary consolidation can bring significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the main structure of the temporary consolidation device of the continuous beam zero block and the main bridge pier of the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0031] Figure 3 It is a schematic plan view of the temporary consolidation device between the continuous beam block No. 0 and the main bridge pier of the present invention;

[0032] Figure 4 Schematic diagram of the internal steel bar structure of the temporary concrete pier of the present invention Figure 1 ;

[0033] Figure 5 It is a structural schematic diagram of the connection between the temporary concrete buttress, block 0 and the main bridge pier of the present invention;

[0034] Figure 6 Schematic diagram of the internal steel bar structure of the temporary concrete pier of the present invention Figure 2 .

[0035] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0036] 1. Main bridge pier; 11. Bracket embedded parts; 12. Support wall embedded parts;

[0037] 2. Block No. 0; 3. Temporary concrete pier; 31. Threaded steel bar;

[0038] 4. Steel pipe; 41. Bracket support plate; 42. Column foot embedded parts; 43. Temporary anchor steel bars;

[0039] 5. Steel mesh; 6. Transverse stirrups;

[0040] 7. Bracket; 71. Support wall; 72. Rack; 73. Crossbeam; 74. Demoulding pad; 75. Diagonal brace. DETAILED DESCRIPTION

[0041] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0042] like Figure 1 to Figure 6 As shown, a temporary consolidation device for a continuous beam No. 0 block and a main bridge pier of the present embodiment is used to connect the main bridge pier 1 and the No. 0 block 2 above the main bridge pier 1; it includes a temporary concrete pier 3 and a ground-type steel tube temporary bracket, the temporary concrete pier 3 is arranged on the top of the main bridge pier 1 and supports the bottom of the No. 0 block 2, the temporary concrete pier 3 is embedded with threaded steel bars 31 which are arranged vertically and respectively embedded in the No. 0 block 2 and the main bridge pier 1, and at least one temporary concrete pier 3 is provided on the left and right sides of the top of the main bridge pier 1; the left and right sides of the main bridge pier 1 are each provided with a ground-type steel tube temporary bracket, the ground-type steel tube temporary bracket includes at least one steel pipe 4 and a temporary support frame, the steel pipe 4 is arranged vertically and fixed at the bottom, the top of the steel pipe 4 is connected to a temporary anchoring steel bar 43, the upper half of the temporary anchoring steel bar 43 is embedded in the No. 0 block 2, and the temporary support frame is connected to the side wall of the steel pipe 4 and the side wall of the main bridge pier 1 and supported on the bottom of the No. 0 block 2.

[0043] like Figure 1 to Figure 3 , Figure 5 and Figure 6 As shown, at least two rows of threaded steel bars 31 are embedded in the temporary concrete pier 3 of this embodiment, and each row of threaded steel bars 31 includes a plurality of threaded steel bars 31 arranged at intervals in front and back; a plurality of transverse stirrups 6 are also embedded in the temporary concrete pier 3 and arranged at intervals in sequence up and down. By providing at least two rows of threaded steel bars and a plurality of transverse stirrups, the structural strength and stability of the temporary concrete pier are improved.

[0044] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, a transversely arranged steel mesh 5 is tied to the threaded steel bar 31 embedded in the No. 0 block 2 , and the steel mesh 5 is embedded in the No. 0 block 2 .

[0045] like Figure 1As shown, the outer wall of the main pier 1 of this embodiment is provided with a bracket embedded part 11 and a buttress embedded part 12, the ground-type steel pipe tube temporary support includes two steel pipes 4 and a temporary support frame; the temporary support frame includes a bracket 7, a buttress 71 and a rack 72, each steel pipe 4 is provided with a bracket support plate 41, the bracket 7 is arranged on the bracket support plate 41 of the two steel pipes 4 and is fixedly connected to the bracket embedded part 11, the buttress 71 is fixed on the steel pipe 4 at one end and fixed on the buttress embedded part 12 at the other end; the rack 72 is installed on the bracket 7 and supported on the top of the zero block 2. By providing the bracket embedded part and the buttress embedded part, the steel pipe and the bracket can be effectively and stably supported and connected.

[0046] like Figure 1 to Figure 3 As shown, the bracket 7 of this embodiment is arranged to extend left and right, and a plurality of crossbeams 73 extending front and back are arranged on the bracket 7. The racks 72 are arranged to extend left and right, and the racks 72 are multiple and are arranged in sequence along the front and back directions. The crossbeams 73 are supported on the bracket 7 by demoulding pads 74, and the lower part of the bracket 7 is connected to the steel pipe 4 by a diagonal brace 75.

[0047] like Figure 1 and Figure 3 As shown, concrete is poured into the steel pipe 4 of this embodiment, and the lower half of the temporary anchoring steel bar 43 is pre-buried in the concrete of the steel pipe 4.

[0048] like Figure 1 As shown, a column base embedded part 42 is fixed to the bottom of the steel pipe 4 in this embodiment.

[0049] like Figure 3 As shown, two temporary concrete piers 3 are respectively arranged on the left and right sides of the top of the main pier 1 of this embodiment, and the two temporary concrete piers 3 on the left and the two temporary concrete piers 3 on the right are arranged one by one in the left-right direction.

[0050] like Figure 3 As shown, a steel pipe 4 is provided on each of the left and right sides of a corresponding group of temporary concrete piers 3 in this embodiment.

[0051] The temporary concrete buttress 3 of this embodiment is arranged on the top of the main pier 1, bearing the vertical support reaction force corresponding to the maximum unbalanced moment at the middle support point. Each temporary concrete buttress 3 has 44 φ32 finely rolled threaded steel bars embedded in one side of the pier top and the box beam. Two layers of vertical and horizontal steel mesh are required to be laid at the joint between the continuous beam box and the temporary concrete buttress 3. Transverse stirrups are arranged inside the temporary concrete buttress. The temporary concrete buttress is mainly cast with C50 concrete.

[0052] The temporary consolidation device of this embodiment is used to rigidly connect the zero-block beam segment with the bridge pier through temporary consolidation during the cantilever casting process, so as to prevent the zero-block beam segment from displacement or deformation during the cantilever casting process, thereby ensuring the overall stability of the bridge structure and construction safety. The present invention optimizes the structural form and reduces the weight of the bracket through structural force modeling and analysis, so as to achieve the effects of light weight, high efficiency, safety, and convenient installation and disassembly.

[0053] This embodiment also provides a construction method of a temporary consolidation device for the continuous beam block No. 0 and the main bridge pier, comprising the following steps:

[0054] S1, first construct the main pier 1, embed the threaded steel bar 31 on the top of the main pier 1, tie the transverse stirrups 6 on the threaded steel bar 31 and make a temporary pier template, pour concrete in the temporary pier template to form a temporary concrete pier 3, and the upper end of the threaded steel bar 31 partially extends out of the temporary concrete pier 3;

[0055] S2, fix the bottom of the steel pipe 4 and connect the top with temporary anchor steel bars 43;

[0056] S3, erecting a temporary support frame, so that the temporary support frame is connected to the side wall of the steel pipe 4 and the side wall of the main bridge pier 1 respectively;

[0057] S4, set up the template of block 0 2, and cast to form block 0 2, so that the upper end of the threaded steel bar 31 and the upper half of the temporary anchor steel bar 43 are buried in block 0 2.

[0058] The core of the construction method of this embodiment is to use 4 steel pipes to tie to resist the unbalanced moment of the entire continuous beam suspended pouring construction. The embedded parts of the steel pipe core column foot, the embedded parts of the supporting wall on the pier body, and the embedded parts of the bracket need to be accurately positioned to ensure that there is no misalignment when the bracket is installed; the slope adjustment rack slope angle must be strictly processed according to the longitudinal slope of the bottom of the beam in the construction design drawing to avoid the occurrence of angle bending in the later suspended pouring section construction; the entire temporary bracket has many components, and attention should be paid to the welding quality during welding to ensure the quality of the weld and the safety of the structure; the overall temporary consolidation is assembled and welded by multiple components. After the construction is completed, the entire structure needs to be pre-stressed to eliminate non-elastic deformation and ensure structural stability; during the pier top construction, pay attention to the embedded depth, spacing and plane position of the fine-rolled threaded steel of the temporary concrete pier to ensure the construction quality and structural safety of the temporary pier.

[0059] The construction method of this embodiment adopts a temporary consolidation structure of an internal fine-rolled threaded steel concrete pier (temporary concrete pier) + an external ground-type steel pipe core tube support (ground-type steel pipe tube temporary support), which can well solve the characteristics of unbalanced force of continuous beams, ensure the construction safety of block 0, improve construction quality, and speed up construction progress.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A temporary consolidation device for a continuous beam zero block and a main bridge pier, used to connect the main bridge pier and the zero block above the main bridge pier; characterized in that: It includes temporary concrete piers and ground-type steel pipe tube temporary supports. The temporary concrete piers are arranged on the top of the main pier and support the bottom of the No. 0 block. The temporary concrete piers are embedded with threaded steel bars that are vertically arranged and respectively embedded in the No. 0 block and the main pier. At least one temporary concrete pier is provided on each of the left and right sides of the top of the main pier; a ground-type steel pipe tube temporary support is provided on each of the left and right sides of the main pier. The ground-type steel pipe tube temporary support includes at least one steel pipe and a temporary support frame. The steel pipe is vertically arranged and fixed at the bottom. The top of the steel pipe is connected to a temporary anchoring steel bar, and the upper half of the temporary anchoring steel bar is embedded in the No. 0 block. The temporary support frame is connected to the side wall of the steel pipe and the side wall of the main pier and supported on the bottom of the No. 0 block.

2. According to claim 1, a temporary consolidation device for the continuous beam zero block and the main bridge pier is characterized in that: At least two rows of threaded steel bars are embedded in the temporary concrete pier, and each row of threaded steel bars includes a plurality of threaded steel bars arranged at intervals in front and back; a plurality of transverse stirrups are also embedded in the temporary concrete pier and arranged at intervals in sequence up and down.

3. The temporary consolidation device for the continuous beam zero block and the main bridge pier according to claim 1 is characterized in that: A transversely arranged steel mesh is tied to the threaded steel bars embedded in the No. 0 block, and the steel mesh is embedded in the No. 0 block.

4. According to claim 1, a temporary consolidation device for the continuous beam zero block and the main bridge pier is characterized in that: The outer side wall of the main pier is provided with a bracket embedded part and a buttress embedded part. The ground-type steel pipe tube temporary support includes two steel pipes and a temporary support frame; the temporary support frame includes a bracket, a buttress and a rack. Each steel pipe is provided with a bracket support plate. The bracket is arranged on the bracket support plate of the two steel pipes and is fixedly connected to the bracket embedded part. One end of the buttress is fixed on the steel pipe, and the other end is fixed on the buttress embedded part; the rack is installed on the bracket and supported on the top of the zero block.

5. The temporary consolidation device for the continuous beam zero block and the main bridge pier according to claim 4 is characterized in that: The bracket is arranged to extend left and right, and a plurality of beams extending front and back are arranged on the bracket. The rack is arranged to extend in the left and right direction, and there are a plurality of racks arranged in sequence and spaced apart in the front and back direction.

6. The temporary consolidation device for the continuous beam zero block and the main bridge pier according to claim 1 is characterized in that: Concrete is poured in the steel pipe, and the lower half of the temporary anchoring steel bar is pre-buried in the concrete of the steel pipe.

7. The temporary consolidation device for the continuous beam zero block and the main bridge pier according to claim 1 is characterized in that: A column foot embedded part is fixed to the bottom of the steel pipe.

8. The temporary consolidation device for the continuous beam zero block and the main bridge pier according to claim 1 is characterized in that: Two temporary concrete buttresses are respectively arranged on the left and right sides of the top of the main pier, and the two temporary concrete buttresses on the left and the two temporary concrete buttresses on the right are arranged one by one in the left-right direction.

9. The temporary consolidation device for the continuous beam zero block and the main bridge pier according to claim 8, characterized in that: A corresponding set of temporary concrete piers are provided with a steel pipe on each side.

10. A construction method for a temporary consolidation device for the continuous beam block No. 0 and the main bridge pier according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, first construct the main bridge pier, embed threaded steel bars on the top of the main bridge pier, tie transverse stirrups on the threaded steel bars and make a temporary pier template, pour concrete in the temporary pier template to form a temporary concrete pier, and the upper end of the threaded steel bars partially protrudes from the temporary concrete pier; S2, fix the bottom of the steel pipe and connect the temporary anchor steel bars on the top; S3, erecting a temporary support frame, and connecting the temporary support frame to the side wall of the steel pipe and the side wall of the main bridge pier respectively; S4, set up the No. 0 block formwork and cast to form the No. 0 block, so that the upper end of the threaded steel bar and the upper half of the temporary anchor steel bar are buried in the No. 0 block.

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