Repeatedly-detachable capping beam structure design and implementation method
阅读说明：本技术 可重复拆装盖梁结构设计及实施方法 (Repeatedly-detachable capping beam structure design and implementation method ) 是由 李方元 徐栋 刘超 沈殷 柳惠芬 张国泉 李国平 于 2019-10-18 设计创作，主要内容包括：可重复拆装盖梁结构设计及实施方法,其特征在于,将盖梁根据分段吊装重量及受力特点,采用横桥向分成若干段,同时根据主梁与盖梁搭接和传力部位特点,在顺桥向分成若干片,然后以预制形式加工制作；相邻段或片其接头采用可拆和再装专用接头,实现快速连接,通过横向桥的可重复张拉的预应力设置,实现横桥向的整体连接；通过顺桥向的拉杆或接送,实现顺桥向相邻片的连接,从而形成完整的盖梁实现整体受力。可为桥梁设计与施工,特别是桥梁重复使用,减少建筑垃圾和对环境的影响具有重要经济和社会价值。(The design and implementation method of the repeatedly detachable capping beam structure is characterized in that the capping beam is divided into a plurality of sections in the transverse bridge direction according to the characteristics of sectional hoisting weight and stress, and is divided into a plurality of pieces in the bridge direction according to the characteristics of the lap joint and force transmission part of the main beam and the capping beam, and then the capping beam is processed and manufactured in a prefabricated mode; the joints of the adjacent sections or sheets adopt detachable and reloadable special joints to realize quick connection, and the integral connection in the transverse bridge direction is realized through the prestress setting of the transverse bridge capable of being tensioned repeatedly; the connection of adjacent plates along the bridge direction is realized through the pull rod or the receiving and sending along the bridge direction, so that the complete capping beam is formed to realize the integral stress. The method can be used for bridge design and construction, particularly for bridge reuse, and has important economic and social values for reducing construction waste and influence on environment.)
1. A design and construction method of a bridge bent cap capable of being repeatedly disassembled and assembled is characterized in that the bent cap is divided into a plurality of sections in the transverse bridge direction according to the characteristics of sectional hoisting weight and stress, and is divided into a plurality of pieces in the bridge direction according to the characteristics of the lap joint and force transmission part of a main beam and the bent cap, and then the pieces are processed and manufactured in a prefabricated mode; the joints of the adjacent sections or sheets adopt detachable and reloadable special joints to realize quick connection, and the integral connection in the transverse bridge direction is realized through the prestress setting of the transverse bridge capable of being tensioned repeatedly; the connection of adjacent plates along the bridge direction is realized through the pull rod or the receiving and sending along the bridge direction, so that a complete cover beam is formed to realize integral stress
Wherein the content of the first and second substances,
the method comprises the steps that firstly, a plurality of transverse bridge segments are combined to form a transverse bridge member;
the individual transverse bridge segments 101 are spliced together in the transverse bridge direction.
The method relates to two, a plurality of components in the forward bridge direction are combined into a component in the forward bridge direction;
the three bridge-direction sub-pieces 102 are spliced in the bridge direction, the left piece and the right piece are symmetrical in the bridge direction by taking the central piece as the center piece, and the shapes of the left piece and the right piece are matched with the shapes of the transverse bridge-direction segments 101 for being stacked up and down.
The method relates to III, prestressed cable and prestressed cable pipeline 103
The transverse bridge direction segment and the transverse bridge direction segment are respectively provided with a prestressed cable pipeline which can be repeatedly penetrated and tensioned in a slicing mode, and the prestressed cable pipeline is used for penetrating a cable again when being reassembled after being disassembled.
The method relates to a connection system existing between transverse bridge segments and between forward bridge segments
Comprises a connecting rod 104 and a special joint mechanism;
the three sub-pieces 102 are spliced in the bridge direction, and the left and right sub-pieces are connected with the central piece in the bridge direction by adopting a connecting rod.
Each transverse bridge segment 101 is spliced in the transverse bridge direction by adopting a connecting joint mechanism, the joints are connected by using a bolt type and are formed by a plurality of connecting joints, and the connecting joints can be embedded or welded and are respectively arranged on the cross sections of two sides of two contact components.
The joint mechanism comprises a female head, a male head and a pin bolt piece;
each joint is divided into a sub-joint 3 and a female joint 2 which are respectively pre-buried or welded to adjacent sections or sub-pieces;
the female joint 2 comprises a body and feet 22, and the female joint 2 is embedded into the segment (slicing) through the feet 22 or welded at the end part of the segment (slicing); the body comprises an external base plate 211 and a flat introducing cavity 212 embedded in the segment, wherein the plane of the base plate 211 is provided with an inlet 213, and the side part of the introducing cavity 212 is provided with a through hole 214;
the sub-joint 3 comprises a body and feet 32, and the sub-joint 3 is embedded into the segment through the feet 32 or welded at the end part of the segment; the body comprises an external substrate 311 and a flat tongue 312 inserted into the flat introducing cavity 212, wherein the flat tongue 312 is arranged on the plane of the substrate 311, and a through hole 314 is arranged on the side part of the flat tongue 312.
The pin 4 and the through holes distributed in the adjacent sections. Each sub-joint 3 is inserted into the corresponding female joint 2, and after the assembly reaches a preset position, a pin bolt 4 is inserted into a through hole in the segment for realizing the integral fixation of the joint mechanism.
Technical Field
The application belongs to the field of bridge engineering, in particular to the technical field of concrete beam bridges, and is suitable for popularization of the current assembling construction technology in China.
Background
China is a big bridge construction country, particularly concrete bridges are large in size and wide in range, densely-arranged assembled bridges are mostly adopted in the upper structure, and the cross section forms comprise hollow slabs, T-shaped beams, small box beams and the like. In recent years, industrial construction bridges are becoming hot spots in the industry, the advantages of environmental protection, guaranteed prefabricated part quality inspection system and high on-site construction speed are mainly reflected, and meanwhile, the modern construction method also meets the requirement of technical progress of the industry.
In the field of small-span fabricated bridges, the whole-span prefabrication hoisting is mostly adopted for beam bodies; in the field of large-span bridges, the span of a concrete bridge for prefabricated section assembly construction in China is close to 200 meters; the span of the fabricated construction bridge of the steel-concrete composite bridge is increased to about 70 meters. The assembly type construction process or design considers complete bonding between the sections, and the disassembly or repeated connection construction does not exist.
At present, bridge design and construction are carried out in a 'normal installation' angle, the bridges cannot be 'disassembled backwards', namely how to treat the bridges in the future is not considered at the beginning of design, the influence on the environment caused by the final disassembly of concrete bridges in industry is received, and in addition, the rapid expansion of cities and the rapid development of traffic in China, a plurality of bridges have the problem of short service life, and the bridges are generally disassembled and rebuilt instead of being disassembled and reassembled for use, namely, a complete bridge construction method with the whole service life cycle and a system is not formed.
The middle and small span concrete bridge occupies over 90 percent of the bridge in China, and a set of complete system is established to cover the upper structure and the lower structure of the bridge prefabricated section assembly construction bridge, so that huge benefits are certainly brought to the environment and the economy in China.
Disclosure of Invention
The purpose of this application lies in: overcomes the defects of the prior art, and provides a capping beam structure capable of being repeatedly disassembled and assembled, a special joint structure and a design method. Because the bent cap is the key part for force transmission and filtration of the upper main beam structure and the lower pier column structure and the stress specificity of the bent cap, the bent cap is usually designed by adopting a relatively firm section size, so that the bent cap is heavy and is the most difficult ring in an assembled bridge. Although the segment device type construction is adopted at present, the size and the weight of the segment device type construction cannot avoid large-scale construction equipment and operation difficulty. In order to solve the problem, the invention combines the design concept of repeatable disassembly and assembly, designs a plurality of sections and a plurality of pieces of the bent cap, and realizes light and rapid construction by means of detachable joints, prestress and connecting rods.
In order to achieve the above object, the present application provides the following technical solutions:
a design and construction method of a bridge bent cap capable of being repeatedly disassembled and assembled is characterized in that the bent cap is divided into a plurality of sections in the transverse bridge direction according to the characteristics of sectional hoisting weight and stress, and is divided into a plurality of pieces in the bridge direction according to the characteristics of the lap joint and force transmission part of a main beam and the bent cap, and then the pieces are processed and manufactured in a prefabricated mode; the joints of the adjacent sections or sheets adopt detachable and reloadable special joints to realize quick connection, and the integral connection in the transverse bridge direction is realized through the prestress setting of the transverse bridge capable of being tensioned repeatedly; the connection of adjacent plates along the bridge direction is realized through the pull rod or the receiving and sending along the bridge direction, so that the complete capping beam is formed to realize the integral stress.
The method relates to a repeatedly detachable bridge capping beam structure which comprises four parts, namely a plurality of transverse bridge segments, a transverse bridge segment, a prestressed cable and a connecting system;
firstly, a plurality of transverse bridge segments are combined into a transverse bridge member;
the individual
Secondly, combining a plurality of forward-bridge direction fragments into a forward-bridge direction component;
the three bridge-direction sub-pieces 102 are spliced in the bridge direction, the left piece and the right piece are symmetrical in the bridge direction by taking the central piece as the center piece, and the shapes of the left piece and the right piece are matched with the shapes of the transverse bridge-
Thirdly, a prestressed cable (not shown in the figure) and a
The transverse bridge direction segment and the transverse bridge direction segment are respectively provided with a prestressed cable pipeline which can be repeatedly penetrated and tensioned in a slicing mode, and the prestressed cable pipeline is used for penetrating a cable again when being reassembled after being disassembled.
Fourthly, a connecting system existing between transverse bridge-direction segments and between forward bridge-direction fragments
Comprises a connecting rod 104 and a special joint mechanism;
the three sub-pieces 102 are spliced in the bridge direction, and the left and right sub-pieces are connected with the central piece in the bridge direction by adopting a connecting rod.
Each
The joint mechanism comprises a female head, a male head and a pin bolt piece;
each joint is divided into a
the
the
The pin 4 and the through holes distributed in the adjacent sections. Each
Compared with the prior art, the technical scheme provided by the application is taken as an example and is not limited, and has the following beneficial effects: the repeated dismounting design method and the structure are only suitable for the bent cap. The structure provided by the application provides a brand new thought for protecting resources or environment in China, reducing material and economic waste and realizing the repeated use of bridges, has great economic and social benefits and has great popularization and application values.
Drawings
FIG. 1 is a schematic view of the transverse bridge segment connection of the present invention
FIG. 2 is a schematic view of the present invention showing the sequential bridge connection
FIG. 3 is an exploded view of the joint connector of the present invention (anchoring state (a), exploded state view (b))
FIG. 4 illustrates the basic components of a conventional prefabricated assembled bridge of the prior art
Description of reference numerals:
in the figure:
Forward and aft slice 102
Link 104, link hole 105
Pin 4,
Detailed Description
The technical solutions provided in the present application will be further described with reference to the following specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent in conjunction with the following description.
It should be noted that the embodiments of the present application have a better implementation and are not intended to limit the present application in any way. The technical features or combinations of technical features described in the embodiments of the present application should not be considered as being isolated, and they may be combined with each other to achieve a better technical effect. The scope of the preferred embodiments of this application may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The drawings in the present application are in simplified form and are not to scale, but rather are provided for convenience and clarity in describing the embodiments of the present application and are not intended to limit the scope of the application. Any modification of the structure, change of the ratio or adjustment of the size of the structure should fall within the scope of the technical disclosure of the present application without affecting the effect and the purpose of the present application. And the same reference numbers appearing in the various drawings of the present application designate the same features or components, which may be employed in different embodiments.
A design and construction method of a bridge bent cap capable of being repeatedly disassembled and assembled is characterized in that the bent cap is divided into a plurality of sections in the transverse bridge direction according to the characteristics of sectional hoisting weight and stress, and is divided into a plurality of pieces in the bridge direction according to the characteristics of the lap joint and force transmission part of a main beam and the bent cap, and then the pieces are processed and manufactured in a prefabricated mode; the joints of the adjacent sections or sheets adopt detachable and reloadable special joints to realize quick connection, and the integral connection in the transverse bridge direction is realized through the prestress setting of the transverse bridge capable of being tensioned repeatedly; the connection of adjacent plates along the bridge direction is realized through the pull rod or the receiving and sending along the bridge direction, so that the complete capping beam is formed to realize the integral stress.
A repeatedly detachable bridge bent cap structure is characterized by comprising a plurality of transverse bridge direction sections, transverse bridge direction fragments, prestressed cables and a connecting system.
Firstly, a plurality of transverse bridge segments are combined into a transverse bridge member;
as shown in fig. 1, the individual
Secondly, combining a plurality of forward-bridge direction fragments into a forward-bridge direction component;
as shown in fig. 2, the three forward-to-bridge segments 102 are spliced together in the forward-to-bridge direction, the left and right segments are symmetrical in the forward-to-bridge direction by taking the central segment as a center, and the shapes of the left and right segments are matched with the shapes of the transverse-to-
Third, prestressed cable
The transverse bridge segment and the forward bridge segment can be connected by special joints, and can be provided with prestressed cable pipelines or spaces capable of being repeatedly stretched and pulled according to stress requirements, so that the prestressed cable pipelines or spaces can be stretched and pulled again when being reassembled after being disassembled. How to arrange the prestressed cable is to meet the design specification and safety specification conditions according to the self requirements of each structure of the bent cap, and the prestressed cable belongs to the prior art specification. The prestressed cable is arranged and constructed according to the standard, which is not the innovation point of the invention.
Fourthly, a connecting system existing between transverse bridge-direction segments and between forward bridge-direction fragments
Besides the arrangement of the prestressed cables, the transverse bridge segment and the transverse bridge segment need to be connected with adjacent segments.
The special connecting mechanism includes connecting rod and special joint mechanism, and can be disassembled according to the requirements without destroying main body of the bent cap structure, and can ensure that the structure is stressed after being disassembled and reassembled according to the requirements.
As shown in fig. 2, three forward-bridge split sheets 102 are spliced together in the forward-bridge direction, and the left and right sheets are connected with the central sheet by a connecting rod in the forward-bridge direction.
Each
The joints are respectively pre-buried or welded between the adjacent transverse bridge-
The joint mechanism comprises a female head, a male head and a pin bolt piece; the sub-head and the main head are respectively embedded and fixed with the segments or the fragments and are regularly distributed at the cross section according to the stress requirement; the pin bolt pieces are the male and female connecting pieces, the pin bolt pieces on the same section can be multiple according to the stress requirement, the pin bolt pieces coaxially penetrate through the male and female connecting pieces, and the position distribution is determined according to the stress requirement of the beam section. The specific structural design is as follows:
the joints are distributed over the end sections of
Each joint is divided into a sub-joint 3 (figure b) and a female joint 2 (figure a), which are respectively pre-embedded or welded on adjacent sections or sub-sheets (the figure a is pre-embedded in the left section of the figure 3, and the figure b is pre-embedded in the right section of the figure 3), and the two sub-sub joints are provided with a certain positioning guide mechanism to realize flexible butt joint of structures. The structure is realized as follows: the
As shown in fig. 3, the joint mechanism further comprises a pin 4 and through holes distributed in adjacent segments. Each
The
The joints are respectively arranged on the members at two sides of each section and each segment, the connecting pieces are sufficiently fixed, embedded and welded with the concrete sections at two sides of the joints so as to meet safety standards, the operation and the installation during the assembling and disassembling can be completely realized by the traditional prior art, and the stress after the assembling, the operation during the assembling and the installation during the assembling can be ensured only by using the statement in the specification. The setting requirements and how to implement these security aspects are the specifications and common knowledge in the technical field of the present application. How to fix, pre-embed and weld to ensure the stress safety after assembly is not the content that needs to be disclosed in detail in the technical scheme of the application, and the prior art is utilized to reach the industry standard.
All the components of the invention can be assembled again in different places except the prestressed inhaul cable is updated according to the needs, thereby realizing the secondary use of the beam bridge.
When in design, segment assembling construction is adopted, inverted disassembly can be carried out, each segment or segment can be disassembled, and the segments can be assembled, connected and used again under the condition of need.
Connecting rods 104 capable of repeatedly penetrating and tensioning are arranged along the bridge direction, and the connecting rods 104 can be used for connection again when the bridge is reassembled after being disassembled.
The segments and the segments are in vivo, in vitro and in vitro
In the transverse bridge direction, a prestressed cable (not shown in the figure) can be installed repeatedly or; a connecting rod 104 capable of repeatedly passing through and stretching is arranged along the bridge direction.
When the
When the used segments and the fragments are reassembled and assembled according to needs, the original letter joints and the bolts are only needed to be reused for connecting the adjacent segments or the fragments, and the prestressed cables or the connecting rods are reinstalled in the
According to the integral structure, the transverse bridge is divided into a plurality of sections according to the stress and hoisting requirements during construction, and the transverse bridge is divided into a plurality of pieces along the bridge direction; the transverse bridge adopts detachable joints in the axial direction, and quick assembly and disassembly are realized by combining the prestress setting capable of repeatedly tensioning; the detachable joint and the pull rod are adopted along the bridge direction, so that the detachable joint and the pull rod can be assembled and disassembled along the bridge direction.
The above description is only illustrative of the preferred embodiments of the present application and is not intended to limit the scope of the present application in any way. Any changes or modifications made by those skilled in the art based on the above disclosure should be considered as equivalent effective embodiments, and all the changes or modifications should fall within the protection scope of the technical solution of the present application.
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