CN110714402A

CN110714402A - Supporting anti-cracking component and mounting method thereof

Info

Publication number: CN110714402A
Application number: CN201911117830.1A
Authority: CN
Inventors: 白洪海; 郑舟军; 田雪峰; 刘尊良; 吴正峰; 蔡鹏程; 武林涛; 李栋; 樊文龙; 陶涛; 邹玮敏
Original assignee: ZHEJIANG JIAOGONG HIGHWAY MANTAINANCE CO Ltd
Current assignee: ZHEJIANG JIAOGONG HIGHWAY MANTAINANCE CO Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-01-21

Abstract

The invention discloses a supporting anti-cracking component and an installation method thereof, and relates to the technical field of steel box girder bridges. The supporting anti-cracking assembly comprises a protecting piece, a first supporting rod, a second supporting rod, a sleeve and a fixing piece. The protection piece is hinged to the first supporting rod, one end of the sleeve is sleeved outside the first supporting rod and is in threaded connection with the first supporting rod, the other end of the sleeve is sleeved outside the second supporting rod and is in threaded connection with the second supporting rod, the second supporting rod is hinged to the fixing piece, the protection piece is used for being attached to the bottom of the U-shaped rib and is fixedly connected with the U-shaped rib, and the fixing piece is used for being fixedly connected to the bottom plate. Compared with the prior art, the supporting anti-cracking assembly provided by the invention adopts the first supporting rod and the second supporting rod which are connected through the sleeve threads, so that the top plate of the steel box girder can be supported, the stress amplitude of the steel box girder is reduced, the generation or the expansion of fatigue cracks is prevented, and the supporting anti-cracking assembly is convenient to install, low in cost, practical and efficient.

Description

Supporting anti-cracking component and mounting method thereof

Technical Field

The invention relates to the technical field of steel box girder bridges, in particular to a supporting anti-cracking component and an installation method thereof.

Background

The steel box girder bridge has strong spanning capability and excellent mechanical property, and is widely applied to the field of large-span bridges at home and abroad. At present, orthotropic steel bridge decks are generally adopted for steel box girder bridge roofs, and have the advantages of high material utilization rate, wide application range, high bearing capacity, driving comfort and the like, and the most prominent defect is that the steel box girder bridge decks are easy to fatigue crack.

Fatigue cracking on the steel box girder is mainly concentrated on the welding seam position of the U rib embedding section on the top plate, once the U rib cracks, the number of cracks is large, the U rib is easy to expand, fatigue damage is serious and damage is large, various diseases such as bridge deck pavement reflection cracks and pits can be induced, and driving smoothness and traffic safety are further influenced.

In view of the above, it is important to design and manufacture a supporting anti-cracking assembly capable of preventing cracking or crack propagation and an installation method thereof, especially in the production of steel box girder members.

Disclosure of Invention

The invention aims to provide a supporting anti-cracking component which is simple in structure, can support a top plate of a steel box girder, reduce the stress amplitude of the top plate, prevent fatigue cracks from being generated or expanded, is convenient to install, is low in cost, and is practical and efficient.

The invention also aims to provide an installation method of the supporting anti-cracking component, which has simple and convenient installation steps, and can support the top plate of the steel box girder after the installation is finished, reduce the stress amplitude of the steel box girder and prevent the generation or the expansion of fatigue cracks.

The invention is realized by adopting the following technical scheme.

The utility model provides a support crack control subassembly, be applied to in the steel box roof beam, the steel box roof beam is including relative roof and the bottom plate that sets up, the bottom of roof has the U-shaped rib, support crack control subassembly and include protection piece, first bracing piece, the second bracing piece, sleeve and mounting, protection piece and first bracing piece are articulated, telescopic pot head is located outside first bracing piece, and with first bracing piece threaded connection, another pot head is located outside the second bracing piece, and with second bracing piece threaded connection, the second bracing piece is articulated with the mounting, protection piece is used for the laminating to set up in the bottom of U-shaped rib, and with U-shaped rib fixed connection, the mounting is used for fixed connection on the bottom plate.

Further, the protection piece includes protection portion and first articulated portion, and protection portion and first articulated portion fixed connection, first articulated portion pass through first bolt and first bracing piece are articulated, and protection portion is used for with U-shaped rib fixed connection.

Furthermore, the protection portion is U-shaped, and the protection portion includes first baffle, connecting plate and second baffle, and first baffle passes through connecting plate and second baffle fixed connection, and the combination forms the U-shaped cavity that is used for holding the U-shaped rib, and first articulated portion fixed connection is on the connecting plate.

Further, first articulated portion includes first articulated board and second articulated board, and first articulated board and second articulated board parallel interval set up, and all with protection portion fixed connection, first bracing piece sets up between first articulated board and the second articulated board, and first articulated board, first bracing piece and second articulated board are passed in proper order to first bolt.

Furthermore, the number of the first supporting rods, the second supporting rods, the sleeves and the first hinge parts is two, each first supporting rod is in threaded connection with one second supporting rod through one sleeve, each first supporting rod is hinged with one first hinge part, the two first supporting rods are perpendicular to the bottom plate, or the extending directions of the two first supporting rods are crossed.

Further, the two first hinge portions are arranged in an overlapping mode, the number of the first bolts is one, and the first bolts penetrate through the two first hinge portions and the two first supporting rods.

Further, two first hinge parts are arranged side by side, the number of the first bolts is two, and each first bolt penetrates through one first hinge part and one first supporting rod.

Furthermore, the first support rod is provided with a first thread section, the second support rod is provided with a second thread section, the first thread section and the second thread section are coaxially arranged at intervals, and the sleeve is respectively matched with the first thread section and the second thread section.

Furthermore, the fixing part comprises a fixing part and a second hinged part, the fixing part is fixedly connected with the second hinged part, the second hinged part is hinged with the second supporting rod through a second bolt, and the fixing part is fixedly connected with the bottom plate.

Further, support crack control subassembly still includes the control camera, and the control camera fixed mounting is shot on the mounting, and the control camera is used for with basic station communication connection.

A mounting method of a supporting anti-cracking component is applied to the supporting anti-cracking component, and comprises the following steps: welding or riveting a protection piece hinged with a first supporting rod on the U-shaped rib; welding or riveting a fixing piece hinged with a second supporting rod on the bottom plate; screwing the sleeve on the first support rod or the second support rod; the first support bar and the second support bar are aligned and the sleeve is screwed in reverse to allow the sleeve to be simultaneously screwed to the first support bar and the second support bar.

The supporting anti-cracking component and the installation method thereof provided by the invention have the following beneficial effects:

according to the supporting anti-cracking assembly provided by the invention, the protecting piece is hinged with the first supporting rod, one end of the sleeve is sleeved outside the first supporting rod and is in threaded connection with the first supporting rod, the other end of the sleeve is sleeved outside the second supporting rod and is in threaded connection with the second supporting rod, the second supporting rod is hinged with the fixing piece, the protecting piece is used for being attached to the bottom of the U-shaped rib and is fixedly connected with the U-shaped rib, and the fixing piece is used for being fixedly connected to the bottom plate. Compared with the prior art, the supporting anti-cracking assembly provided by the invention adopts the first supporting rod and the second supporting rod which are connected through the sleeve threads, so that the top plate of the steel box girder can be supported, the stress amplitude of the steel box girder is reduced, the generation or the expansion of fatigue cracks is prevented, and the supporting anti-cracking assembly is convenient to install, low in cost, practical and efficient.

The mounting method of the supporting anti-cracking component provided by the invention has the advantages that the mounting steps are simple and convenient, the top plate of the steel box girder can be supported after the mounting is finished, the stress amplitude of the steel box girder is reduced, and the generation or the expansion of fatigue cracks is prevented.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a supporting anti-cracking assembly installed in a steel box girder according to a first embodiment of the invention;

fig. 2 is a schematic structural diagram of a supporting anti-cracking assembly according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a protector in a supporting anti-cracking assembly according to a first embodiment of the present invention;

FIG. 4 is a cross-sectional view of a protector in a supporting crack control assembly provided by a first embodiment of the present invention;

fig. 5 is a schematic structural view of a fixing member in the supporting anti-cracking assembly according to the first embodiment of the present invention;

fig. 6 is an exploded view of the first support rod connected to the second support rod through the sleeve in the supporting crack-resistant assembly according to the first embodiment of the present invention;

fig. 7 is a block diagram illustrating a step of a method for mounting a supporting anti-cracking assembly according to a first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a supporting anti-cracking assembly according to a second embodiment of the present invention;

fig. 9 is a cross-sectional view of a protector in a supporting crack control assembly according to a second embodiment of the invention.

Icon: 100-supporting an anti-cracking component; 110-a protective element; 111-a protection part; 112-a first hinge; 113-a first baffle; 114-a connecting plate; 115-a second baffle; 116-a first hinge plate; 117-second hinge plate; 120-a first support bar; 121-a first thread segment; 130-a second support bar; 131-a second thread segment; 140-a sleeve; 150-a fixture; 151-a fixed part; 152-a second hinge; 160-monitoring camera; 170-a support; 180-a first bolt; 190-a second bolt; 200-steel box girder; 210-a top plate; 211-U-shaped ribs; 220-backplane.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

First embodiment

Referring to fig. 1, an embodiment of the present invention provides a supporting anti-cracking assembly 100, which is applied to a steel box girder 200. Its simple structure can support the roof 210 of steel box girder 200, reduces its stress amplitude, prevents fatigue crack's production or extension to simple to operate, with low costs, practical high-efficient.

It should be noted that the steel box girder 200 includes a top plate 210 and a bottom plate 220 which are oppositely disposed. The top plate 210 and the bottom plate 220 are arranged in parallel at intervals, the bottom of the top plate 210 is provided with the U-shaped ribs 211, the U-shaped ribs 211 are used for reinforcing the top plate 210, and the supporting anti-cracking component 100 is installed between the top plate 210 and the bottom plate 220 so as to transmit and transfer local load borne by the top plate 210 to the bottom plate 220, so that the stress amplitude of the top plate 210 is reduced, the fatigue performance of the top plate 210 is improved, and the generation or the expansion of fatigue cracks is prevented. Specifically, since fatigue cracks on the top plate 210 are mainly concentrated on the U-shaped rib 211, a position at which the crack prevention assembly 100 is supported corresponds to a position of the U-shaped rib 211 to prevent the U-shaped rib 211 from being cracked or crack-propagated.

Referring to fig. 2, the supporting anti-cracking assembly 100 includes a protecting member 110, a first supporting rod 120, a second supporting rod 130, a sleeve 140, a fixing member 150, and a monitoring camera 160. The protector 110 is hinged to the first support bar 120, and the first support bar 120 can rotate relative to the protector 110. The second support bar 130 is hinged to the fixing member 150, and the second support bar 130 can rotate relative to the fixing member 150. The first support bar 120 and the second support bar 130 are spaced apart from each other and extend in the same direction. One end of the sleeve 140 is sleeved outside the first support rod 120 and is in threaded connection with the first support rod 120, the other end of the sleeve 140 is sleeved outside the second support rod 130 and is in threaded connection with the second support rod 130, and the sleeve 140 can fix the relative positions of the first support rod 120 and the second support rod 130, so that the first support rod 120 and the second support rod 130 are connected into a whole, and at this time, the first support rod 120, the sleeve 140 and the second support rod 130 are combined to form the support member 170.

It should be noted that the protection member 110 is configured to be attached to the bottom of the U-shaped rib 211 and fixedly connected to the U-shaped rib 211, the fixing member 150 is configured to be fixedly connected to the bottom plate 220, and the support member 170 formed by combining the first support bar 120, the sleeve 140 and the second support bar 130 is supported between the U-shaped rib 211 and the bottom plate 220 to transmit the local load applied to the U-shaped rib 211 to the bottom plate 220, so as to prevent the U-shaped rib 211 from cracking or crack propagation. Specifically, the protector 110 is fixedly connected to the U-shaped rib 211 by riveting or welding, so as to improve the connection strength between the protector 110 and the U-shaped rib 211 and facilitate construction; the fixing member 150 is fixedly connected to the base plate 220 by riveting or welding, so as to improve the connection strength between the fixing member 150 and the base plate 220 and facilitate construction. However, in other embodiments, the protection member 110 may also be directly clamped to the bottom of the U-shaped rib 211 under the condition that the working condition allows, so as to fix the relative positions of the protection member 110 and the U-shaped rib 211 by the clamping force; the fixing member 150 can also directly abut against the rib plate on the bottom plate 220 to fix the relative position of the bottom plate 220 and the fixing member 150 by the abutting force, so that the installation and the disassembly are convenient, the operation of electric fire can be avoided, and the safety is high.

In this embodiment, the sleeve 140 can facilitate the installation of the support member 170, so that the support member 170 can be applied to the steel box girders 200 of different sizes, and the universality is good. Specifically, due to the difference in production and processing, the distance between the U-shaped rib 211 of the top plate 210 and the bottom plate 220 may be slightly different, so that after the protective member 110 and the fixing member 150 are installed, the distance between the first support bar 120 and the second support bar 130 is slightly different, and at this time, the sleeve 140 is used to be screwed with the first support bar 120 and the second support bar 130 at the same time, the length of the screw-fit may be slightly increased or decreased to compensate for the change in the distance between the first support bar 120 and the second support bar 130, thereby ensuring that the first support bar 120 and the second support bar 130 can be stably connected together and forming the support member 170.

It should be noted that the monitoring camera 160 is fixedly mounted on the fixing member 150, and the monitoring camera 160 is used for communication connection with a base station (not shown). The monitoring camera 160 faces the ceiling 210 of the steel box girder 200, and can monitor the U-shaped rib 211 to which the protector 110 is attached and the plurality of U-shaped ribs 211 adjacent thereto. Specifically, the monitoring camera 160 can take a picture or make a video recording, and every interval is preset, the staff control through the base station monitoring camera 160 and carry out once shooting to roof 210 image transmission that will shoot the acquisition, the staff can observe roof 210 image, thereby judge whether a plurality of U-shaped ribs 211 on the roof 210 take place the fracture or whether the crack takes place the extension, and then make corresponding treatment, in time prevent the crack extension.

Referring to fig. 3 and 4, the protector 110 includes a protecting portion 111 and a first hinge portion 112. The protection portion 111 is fixedly connected to the first hinge portion 112, and in this embodiment, the protection portion 111 is welded to the first hinge portion 112 to improve the connection strength. The first hinge part 112 is hinged to the first support rod 120 by a first bolt 180, and the first support rod 120 can rotate relative to the first hinge part 112. The protection part 111 is used for being fixedly connected with the U-shaped rib 211 so as to transmit load borne by the U-shaped rib 211.

The protection portion 111 has a U-shape, and the protection portion 111 includes a first baffle 113, a connecting plate 114, and a second baffle 115. The first baffle 113 is fixedly connected with the second baffle 115 through the connecting plate 114, and forms a U-shaped cavity (not shown) for accommodating the U-shaped rib 211 in combination, in this embodiment, the first baffle 113 is integrally formed with the second baffle 115 through the connecting plate 114, so as to improve the connection strength. The first hinge portion 112 is fixedly connected to the connecting plate 114, and the first hinge portion 112 is disposed on a side of the connecting plate 114 away from the U-shaped cavity. Specifically, the U-shaped rib 211 is accommodated in the U-shaped cavity, the shape of the U-shaped rib 211 is matched with that of the U-shaped cavity, and the U-shaped rib 211 is attached to the first baffle 113, the connecting plate 114 and the second baffle 115, so as to improve the connection strength.

First hinge 112 includes a first hinge plate 116 and a second hinge plate 117. The first hinge plate 116 and the second hinge plate 117 are disposed in parallel and spaced apart, and are fixedly connected to the connecting plate 114 of the protecting portion 111. The first support rod 120 is arranged between the first hinge plate 116 and the second hinge plate 117, the first bolt 180 sequentially penetrates through the first hinge plate 116, the first support rod 120 and the second hinge plate 117, the first support rod 120 can rotate relative to the first hinge plate 116 and the second hinge plate 117, and the first hinge plate 116 and the second hinge plate 117 can limit the position of the first support rod 120.

In this embodiment, the number of the first support rods 120, the second support rods 130, the sleeves 140 and the first hinge parts 112 is two, each first support rod 120 is screwed with one second support rod 130 through one sleeve 140, and each first support rod 120 is hinged with one first hinge part 112, i.e. the number of the support parts 170 is two. In addition, the number of the fixing members 150 is two, and each of the second support bars 130 is hinged to one of the fixing members 150.

In this embodiment, the extending directions of the two first support rods 120 are arranged in a crossing manner, the two first support rods 120 intersect with each other, the intersection point is also a hinge point of the two first support rods 120, and the two first support rods 120 can rotate around the intersection point. Further, two first hinge portions 112 are overlapped, the second hinge plate 117 of one first hinge portion 112 is the first hinge plate 116 of the other first hinge portion 112, the number of the first bolts 180 is one, the first bolts 180 penetrate through the two first hinge portions 112 and the two first support rods 120, and the central point of the first bolt 180 is the intersection point of the two first support rods 120. But not limited thereto, in other embodiments, the two first support bars 120 are disposed perpendicular to the bottom plate 220, and the two first support bars 120 are disposed in parallel and spaced apart.

It should be noted that, when the two first support rods 120 are connected with the two second support rods 130 through the two sleeves 140 in a one-to-one correspondence manner to form the two supporting members 170, since the protecting member 110 is fixedly connected to the U-shaped rib 211 and the fixing member 150 is fixedly connected to the bottom plate 220, the structure of the whole anti-cracking assembly 100 is fixed, at this time, the first support rods 120 cannot rotate relative to the protecting member 110 any more, and the second support rods 130 cannot rotate relative to the fixing member 150 any more. Meanwhile, the two supporting members 170 are combined to form a triangle, and the triangle has high stability, so that the situation that the first supporting rod 120 or the second supporting rod 130 is broken can be avoided, and the whole supporting anti-cracking assembly 100 is stable and reliable.

Referring to fig. 5, the fixing member 150 includes a fixing portion 151 and a second hinge portion 152. The fixing portion 151 is fixedly connected to the second hinge portion 152, and the monitoring camera 160 is fixedly mounted on the fixing portion 151. In this embodiment, the fixing portion 151 and the second hinge portion 152 are welded to improve the connection strength. The second hinge part 152 is hinged to the second support rod 130 by a second bolt 190, and the second support rod 130 can rotate relative to the second hinge part 152. The fixing portion 151 is used to be fixedly coupled with the base plate 220 to transmit a load to the base plate 220.

In this embodiment, the specific structure of the second hinge portion 152 is the same as that of the first hinge portion 112, and is not repeated herein.

It should be noted that the fixing portion 151 is shaped like a flat plate to increase the force-bearing area, and the area of the fixing portion 151 needs to be determined according to actual conditions, so that the load transmitted by the second supporting rod 130 to the fixing portion 151 through the second hinge portion 152 can be uniformly distributed on the bottom plate 220, thereby preventing the stress concentration of the bottom plate 220 and avoiding the deformation and even cracking of the bottom plate 220.

Referring to fig. 6, in the present embodiment, the first supporting rod 120 is provided with a first threaded section 121, and the second supporting rod 130 is provided with a second threaded section 131. The cross sections of the first support rod 120 and the second support rod 130 are circular or rectangular, the cross sections of the first threaded section 121 and the second threaded section 131 are circular, the first threaded section 121 and the second threaded section 131 are coaxially arranged at intervals, and the sleeve 140 is respectively matched with the first threaded section 121 and the second threaded section 131, so that the first support rod 120 is in threaded connection with the second support rod 130 through the sleeve 140.

It should be noted that in the present embodiment, the outer side of the sleeve 140 is hexagonal, and the inner side is provided with a thread, that is, the sleeve 140 is nut-shaped, so that the worker can conveniently screw. However, the invention is not limited to this, in other embodiments, the outer side of the sleeve 140 may also be circular, two through holes are oppositely arranged on the sleeve 140, both the two through holes are used for the twisting column to extend into, and the worker can drive the sleeve 140 to rotate by rotating the twisting column, so as to connect the first support rod 120 and the second support rod 130, and at this time, the worker drives the sleeve 140 to rotate by using the lever principle, so as to play a role of saving power.

In this embodiment, the fixing member 150, the sleeve 140 and the protection member 110 are made of high-strength steel material to improve the overall strength of the support crack prevention assembly 100. But not limited thereto, in other embodiments, the fixing member 150, the sleeve 140 and the protection member 110 may be made of other high-strength materials, which will not be described herein.

Referring to fig. 7, the present embodiment further provides an installation method of the supporting anti-cracking assembly 100, including the following steps:

step S101: the protector 110 having the first support bar 120 hinged thereto is welded or riveted to the U-shaped rib 211.

It should be noted that, in step S101, the first support rod 120 is first hinged to the protector 110 by the first bolt 180, so that the first support 170 can rotate relative to the protector 110, then the protector 110 is closely disposed on the U-shaped rib 211, so that the position of the protector 110 corresponds to a position where the U-shaped rib 211 needs to be prevented from cracking or a position where the U-shaped rib 211 has been cracked and needs to be prevented from crack propagation, and then the protector 110 is riveted or welded to the U-shaped rib 211, so as to fix the relative position.

Step S102: the fixing member 150 hinged with the second support bar 130 is welded or riveted to the base plate 220.

In step S102, the second support bar 130 is first hinged to the fixing member 150 by the second bolt 190, so that the second support member 170 can rotate relative to the fixing member 150, then the fixing member 150 is attached to the bottom plate 220 at a position corresponding to the protection member 110, and then the fixing member 150 and the bottom plate 220 are riveted or welded to fix the relative positions.

Step S103: the sleeve 140 is screwed to the first support bar 120 or the second support bar 130.

It should be noted that, in step S103, the sleeve 140 is screwed on the first support rod 120, so that the sleeve 140 is completely sleeved on the first support rod 120; or the sleeve 140 is screwed on the second support rod 130, so that the sleeve 140 is completely sleeved on the second support rod 130.

Step S104: the first support bar 120 and the second support bar 130 are aligned and the sleeve 140 is reversely screwed so that the sleeve 140 is simultaneously screw-coupled to the first support bar 120 and the second support bar 130.

It should be noted that, in step S104, first, the first support rod 120 is rotated relative to the protection member 110, the second support rod 130 is rotated relative to the fixing member 150, so that the first support rod 120 and the second support rod 130 are aligned, that is, the extending directions of the first support rod 120 and the second support rod 130 are collinear, then the sleeve 140 is reversely screwed, so that the sleeve 140 is withdrawn from the first support rod 120 or the second support rod 130 and screwed into the second support rod 130 or the first support rod 120, and when the fitting length of the sleeve 140 and the first support rod 120 is equal to the fitting length of the sleeve 140 and the second support rod 130, the installation is completed, and at this time, the first support rod 120, the sleeve 140 and the second support rod 130 are combined to form the support member 170.

It should be noted that in the present embodiment, since the number of the first support rod 120, the sleeve 140 and the second support rod 130 is two, the steps S102, S103 and S104 need to be repeated once again to complete the installation of the whole support anti-cracking assembly 100.

In the supporting anti-cracking assembly 100 provided by the embodiment of the present invention, the protecting member 110 is hinged to the first supporting rod 120, one end of the sleeve 140 is sleeved outside the first supporting rod 120 and is in threaded connection with the first supporting rod 120, the other end of the sleeve 140 is sleeved outside the second supporting rod 130 and is in threaded connection with the second supporting rod 130, the second supporting rod 130 is hinged to the fixing member 150, the protecting member 110 is configured to be attached to the bottom of the U-shaped rib 211 and is fixedly connected to the U-shaped rib 211, and the fixing member 150 is configured to be fixedly connected to the bottom plate 220. Compared with the prior art, the supporting anti-cracking assembly 100 provided by the invention adopts the first supporting rod 120 and the second supporting rod 130 which are connected through the sleeve 140 in a threaded manner, so that the top plate 210 of the steel box girder 200 can be supported, the stress amplitude of the steel box girder is reduced, the generation or the expansion of fatigue cracks is prevented, and the supporting anti-cracking assembly is convenient to install, low in cost, practical and efficient.

Second embodiment

Referring to fig. 8 and 9, in an embodiment of the present invention, a supporting anti-cracking assembly 100 is provided, which is different from the first embodiment in that two first hinges 112 are arranged side by side instead of being arranged in an overlapping manner.

In this embodiment, the extending directions of the two first supporting rods 120 are arranged to intersect, but the two first supporting rods 120 do not intersect any more, and the two first hinge portions 112 are arranged on the protecting portion 111 in parallel and spaced apart, that is, the hinge points of the two first supporting rods 120 are arranged in parallel and spaced apart. Further, two first hinge parts 112 are arranged side by side, the number of the first bolts 180 is two, each first bolt 180 passes through one first hinge part 112 and one first support rod 120, and the center point of each bolt is the hinge point of one support rod. But not limited thereto, in other embodiments, the two first support bars 120 are disposed perpendicular to the bottom plate 220, and the two first support bars 120 are disposed in parallel and spaced apart.

It should be noted that, when the two first support rods 120 are connected with the two second support rods 130 through the two sleeves 140 in a one-to-one correspondence manner to form the two supporting members 170, since the protecting member 110 is fixedly connected to the U-shaped rib 211 and the fixing member 150 is fixedly connected to the bottom plate 220, the structure of the whole anti-cracking assembly 100 is fixed, at this time, the first support rods 120 cannot rotate relative to the protecting member 110 any more, and the second support rods 130 cannot rotate relative to the fixing member 150 any more. Meanwhile, the two supporting members 170 are combined to form a trapezoid, so that the whole supporting anti-cracking assembly 100 is stable and reliable.

In this embodiment, the distance between the two first hinges 112 is smaller than the distance between the two second hinges 152, i.e. the minimum distance between the two first support bars 120 is smaller than the minimum distance between the two second support bars 130. But not limited thereto, in other embodiments, the distance between the two first hinges 112 may be larger than the distance between the two second hinges 152, i.e. the minimum distance between the two first support bars 120 is larger than the minimum distance between the two second support bars 130.

The beneficial effects of the supporting anti-cracking assembly 100 provided by the embodiment of the invention are the same as those of the first embodiment, and are not described again here.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a support crack control subassembly, is applied to in the steel box girder, the steel box girder is including relative roof and the bottom plate that sets up, the bottom of roof has the U-shaped rib, a serial communication port, support crack control subassembly includes protection piece, first bracing piece, second bracing piece, sleeve and mounting, protection piece with first bracing piece is articulated, telescopic pot head is located outside the first bracing piece, and with first bracing piece threaded connection, another pot head is located outside the second bracing piece, and with second bracing piece threaded connection, the second bracing piece with the mounting is articulated, protection piece be used for the laminating set up in the bottom of U-shaped rib, and with U-shaped rib fixed connection, the mounting be used for fixed connection in on the bottom plate.

2. The assembly of claim 1, wherein the protector comprises a protector portion and a first hinge portion, the protector portion is fixedly connected to the first hinge portion, the first hinge portion is hinged to the first support rod by a first bolt, and the protector portion is fixedly connected to the U-shaped rib.

3. The supporting and anti-cracking assembly according to claim 2, wherein the protecting part is U-shaped, the protecting part comprises a first baffle plate, a connecting plate and a second baffle plate, the first baffle plate is fixedly connected with the second baffle plate through the connecting plate and combined to form a U-shaped cavity for accommodating the U-shaped rib, and the first hinge part is fixedly connected to the connecting plate.

4. The assembly of claim 2, wherein the first hinge comprises a first hinge plate and a second hinge plate, the first hinge plate and the second hinge plate are spaced apart and parallel and are both fixedly connected to the protector, the first support rod is disposed between the first hinge plate and the second hinge plate, and the first bolt passes through the first hinge plate, the first support rod and the second hinge plate in sequence.

5. The assembly of claim 2, wherein the number of the first support rods, the second support rods, the sleeves and the first hinges is two, each of the first support rods is connected to one of the second support rods through one of the sleeves, each of the first support rods is hinged to one of the first hinges, both of the first support rods are arranged perpendicular to the bottom plate, or the extending directions of the first support rods are arranged to intersect.

6. The assembly of claim 5, wherein two of said first hinges are disposed in an overlapping relationship, and wherein said first bolt is one in number and passes through both of said first hinges and both of said first support rods.

7. The assembly of claim 5, wherein two first hinges are disposed side by side, and the number of first bolts is two, each first bolt passing through one first hinge and one first support rod.

8. The assembly of claim 1, wherein the first support rod is provided with a first threaded section and the second support rod is provided with a second threaded section, the first threaded section and the second threaded section are coaxially spaced apart, and the sleeve is respectively engaged with the first threaded section and the second threaded section.

9. The supporting anti-cracking assembly according to claim 1, further comprising a monitoring camera, wherein the monitoring camera is fixedly mounted on the fixing member and is used for being in communication connection with a base station.

10. A method for installing a supporting and anti-cracking component, which is applied to the supporting and anti-cracking component as claimed in any one of claims 1 to 9, and comprises the following steps:

welding or riveting the protection piece hinged with the first supporting rod on the U-shaped rib;

welding or riveting the fixing piece hinged with the second supporting rod on the bottom plate;

screwing the sleeve onto the first support rod or the second support rod;

aligning the first support rod and the second support rod, and reversely screwing the sleeve so that the sleeve is simultaneously in threaded connection with the first support rod and the second support rod.