CN212582404U

CN212582404U - Mounting structure of bridge beam supports

Info

Publication number: CN212582404U
Application number: CN202021029887.4U
Authority: CN
Inventors: 孟文节; 王欢; 陆峰; 左群伟
Original assignee: Changzhou Municipal Engineering Design Research College Co ltd
Current assignee: Changzhou Municipal Engineering Design Research College Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-23
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a mounting structure of a bridge bearing, which relates to the technical field of bridge bearing mounting and comprises a plurality of lower bearing steel plates which are horizontally arranged and positioned at the top of a concrete body, and the lower bearing steel plates are correspondingly positioned below each base and closely attached to the bases; the device also comprises a plurality of mounting components, and each base is connected with the mounting components; the mounting assembly comprises a threaded column, an anchoring nut and an upper base plate, one end of the threaded column penetrates through the lower support steel plate and the base, and the other end of the threaded column is perpendicular to the lower support steel plate and extends into the concrete body; the contact surface of the upper backing plate and the top surface of the base is closely attached, the anchoring nut is in threaded connection with the threaded column, and the lower end of the anchoring nut is closely attached to the top surface of the upper backing plate. The utility model provides a support bottom mounting structure is easy by fatigue failure to cause the problem that bridge structures life subtracts the weak point easily, have the durability that promotes bridge beam supports mounting structure, thereby promote bridge structures life's effect.

Description

Mounting structure of bridge beam supports

Technical Field

The utility model belongs to the technical field of bridge beam supports installation technique and specifically relates to a mounting structure of bridge beam supports is related to.

Background

At present, the bridge support is an important structural component for connecting an upper structure and a lower structure of a bridge, is positioned between the bridge and a pad stone, can reliably transfer load and deformation (displacement and corner) borne by the upper structure of the bridge to the lower structure of the bridge, and is an important force transfer device of the bridge. The device comprises a fixed support and a movable support. The common support forms for bridge engineering include: felt or flat supports, plate rubber supports, ball supports, steel supports, special supports and the like.

At present, a main trunk road can attract a large number of heavy vehicles to pass through, a large number of heavy vehicles can be born by bridges connected with the main traffic trunk road, the bridge mainly adopts a tension support at present, the existing bridge tension support generally comprises a top seat, a supporting seat and a base which are sequentially connected, the top seat is connected with a main beam of the bridge through a high-strength bolt M36x120, and the base is connected with a concrete body below the base through a right-angle foundation bolt M36x 1300.

The above prior art solutions have the following drawbacks: the existing heavy vehicle is generally overloaded seriously, and is used as a bridge connected with a trunk road, the number of the heavy vehicles passing through is also large, so that the loads borne by the bridge supports, no matter the absolute weight of the loads or the frequency of the loads, are easy to far exceed the loads born by foundation bolts and high-strength bolts, the fatigue damage of the mounting structure at the bottom of the support is easy to cause, and the service life of the bridge structure is easy to shorten.

SUMMERY OF THE UTILITY MODEL

According to prior art exist not enough, the utility model aims at providing a bridge beam supports's mounting structure has the durability that promotes bridge beam supports mounting structure to promote bridge structures life's effect.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the mounting structure of the bridge support comprises a plurality of support lower steel plates, wherein the support lower steel plates are horizontally arranged and are positioned at the top of a concrete body, and the support lower steel plates are correspondingly positioned below all bases and are closely attached to the bases;

the device also comprises a plurality of mounting components, and each base is connected with the mounting components;

the mounting assembly comprises a threaded column, an anchoring nut and an upper base plate, one end of the threaded column penetrates through the lower support steel plate and the base, and the other end of the threaded column is perpendicular to the lower support steel plate and extends into a concrete body;

the upper padding plate is closely attached to the contact surface of the top surface of the base, the anchoring nut is in threaded connection with the threaded column, and the lower end of the anchoring nut is closely attached to the top surface of the upper padding plate.

By adopting the technical scheme, the anchoring nut is used for applying the pre-compression stress to the threaded column to be pulled, and the anchoring nut can perform stress diffusion through the upper padding plate after being fastened and connected. The pre-stress can be used for reducing or offsetting the tensile stress of the concrete body caused by the load, so that the tensile stress of the installation component is controlled in a smaller range or even in a pressed state, the occurrence and development of cracks of the concrete body are delayed, and the anti-cracking performance and the rigidity of the installation component are improved.

The lower steel plate of the support is used for leveling the support to ensure that the base is horizontally arranged, and the lower steel plate of the support is used for fixing the threaded column and ensuring that the threaded column is vertically arranged; the upper cushion plate is closely attached to the contact surface of the top surface of the base, so that the upper cushion plate can be kept horizontal; the lower end of the anchoring nut is closely attached to the top surface of the upper backing plate, so that the anchoring nut can be always vertical to the threaded column; finally, the whole installation system keeps vertical stress, so that the oblique stress of the support and the concrete body is reduced, and the fatigue damage of the support and the concrete body is delayed.

The structure has the advantages that the threaded columns are stressed vertically, the bending shear influence of local threaded columns is reduced, the durability of the bridge support mounting structure is improved, and the service life of the bridge structure is prolonged.

The present invention may be further configured in a preferred embodiment as: the threaded column adopts finish-rolled threaded steel bars.

By adopting the technical scheme, the finish-rolled twisted steel is a twisted steel for prestressed concrete, is a straight steel bar with discontinuous external threads and large diameter, high strength and high dimensional accuracy rolled on the whole steel bar, and can be conveniently connected with an anchoring nut or other connectors with internal threads at any section of the finish-rolled twisted steel.

The present invention may be further configured in a preferred embodiment as: one end of the threaded column, which is far away from the anchoring nut, is fixedly connected with a fixing nut and a lower backing plate, and the lower backing plate is positioned on one side, facing the upper backing plate, of the fixing nut.

Through adopting above-mentioned technical scheme, fixation nut is used for connecting and fixes a position the lower bolster, and the lower bolster is used for enlarging the pressurized area of screw thread post in the concrete body to promote the resistance nature of concrete body, then can promote bridge beam supports mounting structure's durability.

The present invention may be further configured in a preferred embodiment as: the threaded column is connected with a plurality of layers of reinforcing mesh from top to bottom, and the reinforcing mesh is located between the upper backing plate and the lower backing plate and close to one side of the lower backing plate.

By adopting the technical scheme, the reinforcing mesh is used for further enlarging the pressed area of the threaded column in the concrete body, so that the resistance of the concrete body is improved, and the durability of the bridge support mounting structure can be further improved.

The present invention may be further configured in a preferred embodiment as: the sealing pipe is sleeved on the outer side of the circumferential direction of the threaded column and is positioned in the concrete body; the sealing tube both ends are connected with the sealing member, just the sealing member with threaded column sealing connection.

Through adopting above-mentioned technical scheme, the sealing tube and sealing member are used for separating the part section of concrete and screw thread post when pouring the concrete to have the deformation space when making the interior screw thread post section atress of sealing tube tensile, and then make the durability of screw thread post better.

The present invention may be further configured in a preferred embodiment as: and sealing oil is injected in the sealing tube.

Through adopting above-mentioned technical scheme, sealing oil is used for preventing steam entering corrosion threaded post in the sealed pipe, and can promote the durability of threaded post.

The present invention may be further configured in a preferred embodiment as: and a post-pouring sealing layer is arranged at the base and covers the base, the upper base plate and the anchoring nut.

By adopting the technical scheme, after the post-pouring sealing layer is used for installing the base and the installation component, the sealing base and the installation component expose the part on the ground, so that the water seepage of the part of the support connected with the concrete body is prevented, the corrosion of the installation component can be reduced, and the durability of the installation component is further improved.

The present invention may be further configured in a preferred embodiment as: be provided with in the concrete body and plant the muscle layer, just the reinforcing bar net piece is located plant the muscle layer in.

Through adopting above-mentioned technical scheme, the bar planting layer can be so that concrete body is more firm, and the reinforcing bar net piece is located the bar planting in situ, can be nested with the reinforcing bar of bar planting layer department to can further promote the steadiness that threaded post and concrete body are connected.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through the arrangement of the lower steel plate of the support, the threaded column, the anchoring nut and the upper base plate, the effect that the whole installation system keeps vertical stress and the bending shear influence of the local threaded column is reduced can be achieved, so that the durability of the installation structure of the bridge support is improved, and the service life of the bridge structure is prolonged;

2. the arrangement of the lower backing plate and the reinforcing mesh can enlarge the pressed area of the threaded column in the concrete body, so that the resistance of the concrete body is improved, and the cracking and damage effects of the concrete body are further delayed;

3. through the setting of sealed tube and sealing member, can play and separate concrete body and screw thread post for screw thread post section atress in the sealed tube has the deformation space when tensile, thereby promotes the effect of screw thread post durability.

Drawings

Fig. 1 is a schematic view of the overall structure of the mounting structure of the present invention.

Fig. 2 is a schematic structural view of the mounting assembly in the present embodiment.

In the figure, 1, a top seat; 11. a supporting seat; 12. a base; 13. a main beam; 2. a steel plate under the support; 21. a concrete body; 22. post-pouring a sealing layer; 3. mounting the component; 31. a threaded post; 32. an anchor nut; 33. an upper base plate; 34. a sealing tube; 35. a seal member; 36. reinforcing mesh sheets; 37. a lower base plate; 38. and (5) fixing the nut.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1, the utility model discloses a mounting structure of bridge beam supports, steel sheet 2 under a plurality of installation component 3 and the support. The lower steel plate 2 of the support is horizontally arranged and correspondingly positioned below each base 12. Concrete body 21 is poured below base 12, one side of lower steel plate 2 of the support is closely attached to the lower surface of base 12, and the other side is embedded into the top of concrete body 21. Each base 12 is vertically arranged and fixedly connected with a plurality of mounting assemblies 3, and the mounting assemblies 3 are also vertically arranged with the lower steel plate 2 of the support and vertically inserted into the concrete body 21. In this embodiment, 12 mounting assemblies 3 are provided on the bottom of one support for securing the base 12.

When installing the support or changing the installation component 3 of support, need earlier chisel away and clear away with former concrete body and the former bar planting layer of support below, need plant the muscle again afterwards, the reinforcing bar of implanting again forms new bar planting layer, then pours the concrete again and forms concrete body 21, and the reinforcing bar of new bar planting layer is arranged and need to be arranged according to the reinforcing bar of former bar planting layer and resume to become whole with the peripheral reinforcing bar connection of former concrete body. The mounting assembly 3 comprises a threaded column 31, and an anchoring nut 32, an upper backing plate 33, a sealing pipe 34, six layers of reinforcing mesh sheets 36, a lower backing plate 37 and a fixing nut 38 which are positioned on the threaded column 31 and connected in sequence from top to bottom. The anchor nut 32, the upper backing plate 33 are located above the ground and the remainder are located within the body of poured concrete 21.

Referring to fig. 1 and 2, a threaded column 31 penetrates through the base 12 and the lower steel plate 2 of the support and is vertically inserted into the concrete body 21, a fixing nut 38 is arranged near the bottom end of the threaded column 31 and is used for positioning and fixing a lower backing plate 37, and the lower backing plate 37 is used for increasing the stress area of the lower end of the threaded column 31. The six layers of the steel mesh sheets 36 above the lower backing plate 37 are poured together when the concrete is poured, and the steel mesh sheets 36 and the steel bars at the steel bar planting layer are arranged in an overlapping mode, so that the concrete body 21 forms the reinforced concrete body 21, and the strength, the rigidity and the resistance of the concrete body 21 can be enhanced.

Referring to fig. 2, the sealing member 35 is connected to both ends of the sealing tube 34, the sealing member 35 is sealingly connected to the threaded cylinder 31, and sealing oil is injected into the sealing tube 34. Preferably, in the present embodiment, the 930-finish-rolled rebar used for the threaded column 31 is 1 meter long, and the 930-finish-rolled rebar has a free length of 1 meter when the galvanized steel pipe with a length of 1 meter is used for the sealing pipe 34. The sealing element 35 is sealed with a low modulus polyurethane sealant, the sealing oil being butter. The galvanized steel pipe has better rigidity, and the sealing pipe 34 can bear certain radial force by adopting the galvanized steel pipe, so that the radial or oblique stress of the threaded column 31 is reduced. The sealing tube 34 and the sealing element 35 can separate the concrete from the sealed threaded column 31 when the concrete is poured again, so that a deformation space for the threaded column 31 to be stretched under force is provided, the threaded rod is deformed under force in a coordinated manner, and the durability of the threaded column 31 is increased. The grease can further seal the section of the threaded column 31 sealed by the sealing tube 34, so that the corrosion of the section of the threaded column 31 is reduced, and the service life of the threaded column 31 is prolonged.

Referring to fig. 1, the bottom surface of the upper backing plate 33 is closely attached to the contact surface of the top surface of the base 12, and when the anchor nut 32 is tightened, the lower end of the anchor nut 32 is closely attached to the top surface of the upper backing plate 33, so that the threaded rod is always vertically stressed, and the influence of local bending shear is less caused. After the construction is completed, the base 12, the upper backing plate 33 and the anchor nut 32 are coated with the grease to form the post-pouring sealing layer 22, so that the mounting assembly 3 can be prevented from being rusted due to water vapor infecting the mounting assembly 3.

The implementation principle of the above embodiment is as follows: when a support is installed or an installation structure of the support is replaced, firstly, a balance weight is added on a main beam 13 of the bridge to prevent the bridge from tilting; and then chiseling the original concrete body and the original embedded reinforcement layer below the support, cleaning the original concrete body and the original embedded reinforcement layer, wherein enough lap joint length needs to be reserved for the originally embedded reinforcement to extend into the concrete pit. Before concrete is poured, the bridge bearing needs to be detected, maintained and maintained, and damaged parts need to be replaced.

And then, planting the steel bars again, resetting the implanted steel bars as much as possible according to the original steel bar planting design, and overlapping and jointly stressing the implanted steel bars and the original steel bars. Subsequently, the threaded column 31 is vertically inserted, and the side of the threaded column 31, on which the reinforcing mesh 36 is arranged, is positioned in the bar planting layer. Then, concrete is poured to form a concrete body 21, the pouring height of the concrete body 21 is considered according to the fact that the main beam 13 can be pre-pressed to the original design position, if the main beam 13 deforms and cannot be pre-pressed to the original relative position in the construction process, the elevation of the upper top surface of the concrete body 21 needs to be adjusted according to the height of the main beam 13 after recalculation.

The vertical positioning of the threaded columns 31 is required to be maintained at all times when the concrete body 21 is poured. And then, after the concrete body 21 is solidified, horizontally placing the upper support lower steel plate 2, and keeping the support lower steel plate 2 flat and tightly attached to the upper surface of the concrete body 21. The support is lower the steel sheet 2 runs through its wall thickness and is provided with first preformed hole, and the screw thread post 31 passes support lower steel sheet 2 through first preformed hole and sets up. Next, the base 12 is provided with a second prepared hole through its wall thickness, through which the threaded post 31 is provided through the base 12. The lower surface of the base 12 is closely attached to the upper surface of the lower steel plate 2 of the support, and the lower surface of the upper backing plate 33 is closely attached to the contact surface of the upper surface of the base 12. The anchor nut 32 is then tightened on the threaded post 31 toward the upper backing plate 33 side. Finally, the post-cast sealing layer 22 is coated at the base 12 by butter to coat the base 12, the upper backing plate 33 and the anchor nut 32, so as to prevent the base and the mounting component 3 from being rusted due to water seepage.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a mounting structure of bridge beam supports which characterized in that: the concrete foundation structure is characterized by comprising a plurality of lower support steel plates (2), wherein the lower support steel plates (2) are horizontally arranged and are positioned at the top of a concrete body (21), and the lower support steel plates (2) are correspondingly positioned below each base (12) and are closely attached to the bases (12);

the device also comprises a plurality of mounting components (3), and each base (12) is connected with the plurality of mounting components (3);

the mounting assembly (3) comprises a threaded column (31), an anchoring nut (32) and an upper backing plate (33), one end of the threaded column (31) penetrates through the lower support steel plate (2) and the base (12), and the other end of the threaded column is perpendicular to the lower support steel plate (2) and extends into the concrete body (21);

the upper padding plate (33) is closely attached to the contact surface of the top surface of the base (12), the anchoring nut (32) is in threaded connection with the threaded column (31), and the lower end of the anchoring nut (32) is closely attached to the top surface of the upper padding plate (33).

2. The bridge bearer mounting structure according to claim 1, wherein: the threaded column (31) adopts finish-rolled threaded steel bars.

3. The bridge bearer mounting structure according to claim 2, wherein: one end of the threaded column (31) far away from the anchoring nut (32) is fixedly connected with a fixing nut (38) and a lower backing plate (37), and the lower backing plate (37) is located on one side, facing the upper backing plate (33), of the fixing nut (38).

4. A mounting structure for a bridge girder according to claim 3, wherein: be connected with a plurality of layers of reinforcing bar net piece (36) from top to bottom on screw thread post (31), just reinforcing bar net piece (36) are located go up backing plate (33) with between backing plate (37) and be close to backing plate (37) one side sets up down.

5. The bridge bearer mounting structure according to claim 2, wherein: a sealing pipe (34) is sleeved on the circumferential outer side of the threaded column (31), and the sealing pipe (34) is positioned in the concrete body (21); sealing elements (35) are connected to two ends of the sealing tube (34), and the sealing elements (35) are connected with the threaded columns (31) in a sealing mode.

6. The bridge bearer mounting structure according to claim 5, wherein: and sealing oil is injected into the sealing tube (34) in a pressing mode.

7. The bridge bearer mounting structure according to claim 1, wherein: the base (12) is provided with a post-pouring sealing layer (22), and the post-pouring sealing layer (22) covers the base (12), the upper backing plate (33) and the anchoring nut (32).

8. The bridge bearer mounting structure according to claim 4, wherein: a bar planting layer is arranged in the concrete body (21), and the steel bar net piece (36) is positioned in the bar planting layer.