CN116254865A - Swivel bearing platform structure with reliable bridge supporting leg connection and construction method - Google Patents

Swivel bearing platform structure with reliable bridge supporting leg connection and construction method Download PDF

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Publication number
CN116254865A
CN116254865A CN202211104040.1A CN202211104040A CN116254865A CN 116254865 A CN116254865 A CN 116254865A CN 202211104040 A CN202211104040 A CN 202211104040A CN 116254865 A CN116254865 A CN 116254865A
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China
Prior art keywords
supporting leg
bearing platform
concrete
steel
spherical hinge
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Pending
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CN202211104040.1A
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Chinese (zh)
Inventor
詹刚毅
赵秋
杨艳
杨耀锋
吴廷楹
贾立志
肖林
曾献平
李新
张晓武
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Jiangxi Chentang Technology Engineering Co ltd
CSSC Shuangrui Luoyang Special Equipment Co Ltd
Original Assignee
Jiangxi Chentang Technology Engineering Co ltd
CSSC Shuangrui Luoyang Special Equipment Co Ltd
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Priority to CN202211104040.1A priority Critical patent/CN116254865A/en
Publication of CN116254865A publication Critical patent/CN116254865A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/10—Deep foundations
    • E02D27/12—Pile foundations
    • E02D27/14—Pile framings, i.e. piles assembled to form the substructure
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/04—Bearings; Hinges
    • E01D19/042—Mechanical bearings
    • E01D19/046—Spherical bearings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
    • E01D21/08—Methods or apparatus specially adapted for erecting or assembling bridges by rotational movement of the bridge or bridge sections
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/04—Mats
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
    • E04C5/073—Discrete reinforcing elements, e.g. fibres
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Mechanical Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention relates to a swivel bearing platform structure with reliable bridge bearing leg connection, which comprises an upper bearing platform, a lower bearing platform, a spherical hinge and a bearing leg structure, wherein the bearing leg structure consists of two side-by-side bearing leg steel pipes, the bearing leg steel pipes are connected through two connecting flat steel plates, and welding nail connecting pieces are arranged on the outer sides of the bearing leg steel pipes and the connecting flat steel plates. Spiral stirrups are arranged around the supporting leg steel pipe, vertically distributed steel bars are arranged on the inner side of each spiral stirrup at intervals along the periphery, and the supporting leg structure is connected with the bearing platform into a whole through cast-in-place concrete. The construction comprises the following steps: (1) manufacturing a spherical hinge support, (2) manufacturing a bridge supporting foot structure, (3) welding a welding nail connecting piece, (4) pouring lower bearing platform concrete, (5) installing a spherical hinge, (6) installing supporting feet, drawing a counter-force seat and a sand box, (7) binding an upper bearing platform rib net, and (8) pouring upper bearing platform concrete. The invention can effectively avoid the problem of insufficient concrete connection strength between the bridge support leg structure and the upper bearing platform, fully ensures the integrity of the reinforced concrete combined structure, and is favorable for the development and popularization of a swivel construction method.

Description

Swivel bearing platform structure with reliable bridge supporting leg connection and construction method
Technical Field
The invention relates to the technical field of civil engineering, in particular to a swivel bearing platform structure with reliable bridge supporting foot connection and a construction method.
Background
With the high-speed increase of the economy in China, the existing road traffic network cannot meet the increasing requirements of automobiles and railways, and the construction of the existing traffic network needs to be expanded. The condition that the road to be constructed is crossed with the existing road frequently occurs in the extension process of the traffic network, and when the bridge construction is carried out in the environment, on one hand, the existing traffic can slow down the construction progress of the bridge, on the other hand, the bridge construction can manufacture potential safety hazards to the existing traffic, and in order to avoid the interference to the existing line during construction, the swivel construction method becomes the preferred method of the engineering.
In the bridge rotation process, a bridge rotation system consisting of an upper main beam, a lower rotation pier, a bearing platform, a spherical hinge, supporting feet and a slideway structure is formed, all parts interact, any link is wrong, and the bridge is greatly influenced. The swivel bearing platform structure transmits load to the foundation through the spherical hinge, and the support is fixedly connected with the front swivel structure and is always in an unstable balance state, and the supporting leg structure can play a supporting role when the swivel structure is unstable, so that the supporting leg becomes an important part in a swivel bearing platform system, and the construction quality of the supporting leg is ensured to be a key of safe construction.
The support leg structure adopts metal materials at present and is provided with a walking plate at the lower part of the support leg for weakening friction with the slideway in order to solve the engineering problem. However, because the contact between the metal material and the concrete is poor, when the post-pouring of the concrete on the bearing platform is completed by the upper structure swivel, the connection reliability of the supporting feet and the concrete is low. In order to improve the reliability of steel-concrete combination at the supporting feet and better develop and popularize a swivel construction method, a swivel bearing platform structure with reliable bridge supporting foot connection and a construction method are to be developed.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a swivel bearing platform structure with reliable bridge supporting foot connection and a construction method.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the swivel bearing platform structure comprises an upper bearing platform, a lower bearing platform, a spherical hinge and a bearing leg structure, wherein the bearing leg structure consists of two side-by-side bearing leg steel pipes, the bearing leg steel pipes are connected through two connecting flat steel plates, and welding nail connecting pieces are arranged on the outer sides of the bearing leg steel pipes and the connecting flat steel plates;
spiral stirrups are arranged around the supporting leg steel pipe, vertical distribution reinforcing steel bars are arranged on the inner side of the spiral stirrups at intervals along the periphery, and the supporting leg structure is connected with a bearing platform into a whole through cast-in-place concrete.
As a preferable scheme, two ends of the two connecting flat steel plates of the supporting leg structure are provided with oblique round holes, the spiral stirrups penetrate through the oblique round holes, and the vertically distributed steel bars and the spiral stirrups are connected into a whole through welding or binding.
As a preferable scheme, the plane projection radius of the spiral stirrup is 10 mm-50 mm larger than the radius of the supporting leg steel pipe, the vertical distance of the spiral stirrup is 40mm-80mm, and the diameter of the spiral stirrup is not smaller than 8mm.
As a preferable scheme, the welding pin connecting pieces are round-head welding pins, the lengths of the welding pin connecting pieces are 60-200 mm, the nominal diameters of the welding pin connecting pieces are 10-19 mm, the welding pin connecting pieces are perpendicular to the surfaces of the supporting leg steel pipes and are connected with the surfaces of the flat steel plates for welding, the welding pin connecting pieces are arranged along the surfaces of the supporting leg steel pipes at intervals of 22.5 degrees, 30 degrees or 45 degrees, and the welding pin connecting pieces are distributed at equal intervals along the surfaces of the flat steel plates.
As a preferable scheme, a partition plate is arranged between the two connecting flat steel plates, and the partition plate is arranged along the connecting line direction of the middle parts of the connecting flat steel plates.
As a preferable scheme, the supporting leg structures are arranged on the center line of the circular slideway taking the center of the spherical hinge as the center of the circle, and the supporting leg structures are arranged at intervals of 45 degrees or 60 degrees.
As a preferable scheme, the bottom of the supporting leg structure is provided with a walking plate, the walking plate is a segment annular steel plate, the two ends of the walking plate along the annular direction are tilted by 10 degrees to 15 degrees, and the thickness of the walking plate is 25mm to 35mm; a gap of 10-20 mm is reserved between the bottom surface of the walking board and the top surface of the annular slideway, and the top plate of the annular slideway is composed of a polytetrafluoroethylene sliding plate, a stainless steel plate and a slideway steel plate from top to bottom.
As a preferable scheme, C50 micro-expansion concrete is filled in the supporting leg steel tube, and polypropylene fibers are doped in the micro-expansion concrete.
A construction method of a swivel bearing platform structure with reliable bridge supporting foot connection comprises the following steps:
(1) Manufacturing a spherical hinge support: prefabricating a spherical hinge-shaped support according to the actual bearing capacity requirement of the on-site swivel engineering, wherein the spherical hinge-shaped support comprises annular stiffening ribs and radial stiffening ribs;
(2) Manufacturing a bridge supporting leg structure: determining the structural size of the bridge supporting feet according to the actual bearing capacity requirement of the on-site swivel engineering, arranging round holes on the connecting flat steel plates, and welding the connecting flat steel plates, the supporting foot steel pipes and the walking plates into a whole;
(3) Welding the welding nail connecting piece: welding nail connecting pieces perpendicular to the surface of the supporting leg steel pipe and connected with the surface of the flat steel plate according to a design drawing and strictly according to the national current safety technology, wherein the welding nail connecting pieces are arranged at intervals of 22.5 degrees or 30 degrees or 45 degrees along the surface of the supporting leg steel pipe, and the welding nail connecting pieces are distributed at equal intervals along the three-equal-dividing points or the four-equal-dividing points of the surface of the flat steel plate;
(4) Pouring the concrete of the lower bearing platform: installing a concrete bottom die and a side die, binding a reinforcing steel bar net, pouring lower layer concrete of a lower bearing platform and curing. After the curing reaches a certain strength, roughening the top surface of the lower concrete layer, and embedding an H-shaped steel cushion block and a leveling nut in advance; arranging a base on the leveling nut, hoisting a slideway, binding a reinforcing steel bar net and pouring micro-expansion concrete to finish the construction of a lower bearing platform;
(5) Installing a spherical hinge: a lower spherical hinge is arranged above the base, polytetrafluoroethylene powder is required to be smeared on the surface of the lower spherical hinge, a shaft pin is hung in the center of the lower spherical hinge, and the upper spherical hinge is hung in a preset position and connected with the shaft pin;
(6) Mounting supporting leg structure, traction counterforce seat and sand box: a supporting leg structure is arranged above the slideway, vertical steel bars are welded in the supporting leg structure, and C50 micro-expansion concrete doped with polypropylene fibers is filled in the supporting leg steel pipe; setting a traction counterforce seat and a sand box at a preset position according to a design drawing;
(7) Binding an upper bearing platform rib net: binding a reinforcing steel bar net at the caulking groove of the upper spherical hinge according to a design drawing, and connecting the caulking groove reinforcing steel bar net and the reinforcing steel bar net of the upper bearing platform into a whole.
(8) Pouring the concrete of the upper bearing platform: and pouring tapered concrete on the side face of the lower spherical hinge, installing a steel pipe support along the periphery of the tapered concrete, and erecting a template on the steel pipe support. And reserving longitudinal and transverse prestress corrugated pipes, and pouring and tamping concrete after the caulking groove reinforcing steel bar net and the bearing platform reinforcing steel bar net are bound. During pouring, attention is paid to the use of vibrating equipment to prevent collision damage. And curing after the concrete pouring is completed.
As a preferable scheme, the steps (1), (2), (3) and (4) are preferably synchronously constructed; when the distance between the supporting leg steel pipes in the step (2) is larger, a partition plate is required to be arranged between the connecting flat steel plates; and (3) placing the supporting foot structure in the step (6) on the temporary wooden cushion layer, and taking down the cushion layer after the supporting foot structure and the upper bearing platform are concreted into a whole, so that a gap of 20mm is reserved between the bottom surface of the walking board of the supporting foot structure and the top surface of the annular slideway.
Compared with the prior art, the invention has the advantages that: through set up the welding nail connecting piece in the spike steel pipe and connect the flat steel sheet outside to and install spiral stirrup around the spike steel pipe, can effectively avoid bridge spike structure and the not enough problem of cushion cap concrete joint strength, fully guaranteed the wholeness of steel-concrete integrated configuration, be favorable to turning construction method's development and popularization.
Drawings
FIG. 1 is a structural elevation of a first embodiment of the present invention;
FIG. 2 is a plan view of a structure according to a first embodiment of the present invention;
FIG. 3 is a plan view of a second embodiment of the present invention;
as shown in the figure: 1-a welding pin connecting piece; 2-supporting leg steel pipes; 3-spiral stirrups; 4-vertically distributing reinforcing steel bars; 5-a steel plate at the bottom surface of the upper turntable; 6-walking board; 7-a separator; 8-connecting the flat steel plates.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the 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.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present invention is conventionally put when used, it is merely for convenience of describing the present invention and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "plurality" means at least 2.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1-2, the invention is realized by adopting the following scheme: the utility model provides a bridge spike connects reliable cushion cap structure of turning, includes cushion cap, lower cushion cap, spherical hinge, spike structure, the spike structure constitute by two spike steel pipes 2 side by side, spike steel pipe 2 is connected through two connection flat steel plates 8 side by side, spike steel pipe 2 and connection flat steel plate 8 outside set up and weld nail connecting piece 1. The spiral stirrup 3 is installed around the supporting leg steel pipe 2, vertical distribution reinforcing bars 4 are arranged at intervals along the periphery on the inner side of the spiral stirrup 3, and the supporting leg structure is connected with the bearing platform into a whole through cast-in-place concrete.
In the first embodiment of the invention, two ends of the two connecting flat steel plates 8 of the supporting leg structure are provided with inclined round holes, the spiral stirrups 3 penetrate through the round holes, and the vertically distributed steel bars 4 and the spiral stirrups 3 are connected into a whole through welding or binding.
In the first embodiment of the invention, the plane projection radius of the spiral stirrup 3 is 10 mm-50 mm larger than the radius of the supporting leg steel pipe 2, the vertical distance of the spiral stirrup 3 is 40mm-80mm, and the diameter of the spiral stirrup 3 is not smaller than 8mm.
In the first embodiment of the invention, the welding pin connecting piece 1 is a round head welding pin, the length of the welding pin connecting piece 1 is 60mm-200mm, the nominal diameter is 10mm-19mm, the welding pin connecting piece 1 is welded on the surface of the vertical supporting leg steel pipe 2 and the surface of the connecting flat steel plate 8, the welding pin connecting piece 1 is arranged along the surface of the supporting leg steel pipe 2 at intervals of 22.5 degrees, 30 degrees or 45 degrees, and the welding pin connecting pieces 1 are distributed at equal intervals along the surface of the connecting flat steel plate 8 at three equal points or four equal points.
In the first embodiment of the present invention, a partition 7 is disposed between the two connecting flat steel plates 8, and the partition 7 is disposed along the direction of the connecting line connecting the middle portions of the flat steel plates 8.
In a first embodiment of the present invention, the supporting leg structures are arranged on a central line of a circular slide way with a center of the spherical hinge as a center, and the supporting leg structures are arranged at intervals of 45 ° or 60 °.
In the first embodiment of the invention, the bottom of the supporting leg structure is provided with the walking plate 6, the walking plate 6 is a segment annular steel plate, the two ends of the walking plate 6 in the circumferential direction are tilted by 10 degrees to 15 degrees, and the thickness of the walking plate 6 is 25mm to 35mm; a gap of 10 mm-20 mm is reserved between the bottom surface of the walking plate 6 and the top surface of the annular slideway, and the top plate of the annular slideway is composed of a polytetrafluoroethylene sliding plate, a stainless steel plate and a slideway steel plate from top to bottom.
In the first embodiment of the invention, the interior of the supporting leg steel pipe 2 is filled with C50 micro-expansion concrete, and polypropylene fibers are doped in the micro-expansion concrete.
In the second embodiment of the present invention, as shown in fig. 3, the difference from the first embodiment of the present invention is that a partition 7 is disposed in the middle of the connecting flat steel plate 8, and the partition 7 is disposed along the direction of the middle connecting line of the connecting flat steel plate 8.
The construction method of the swivel bearing platform structure with reliable bridge supporting foot connection is characterized by comprising the following steps of:
(1) Manufacturing a spherical hinge support: prefabricating a spherical hinge-shaped support according to the actual bearing capacity requirement of the on-site swivel engineering, wherein the spherical hinge-shaped support comprises annular stiffening ribs and radial stiffening ribs;
(2) Manufacturing a bridge supporting leg structure: according to the actual bearing capacity requirement of the on-site swivel engineering, the structural size of the bridge supporting feet is determined, round holes are formed in the connecting flat steel plates 8, and the connecting flat steel plates 8, the supporting foot steel pipes 2 and the walking plates 6 are welded and connected into a whole.
(3) Welding the welding nail connecting piece: according to the design drawing and strictly according to the national current safety technology, welding the welding pin connectors 1 on the surfaces of the supporting leg steel pipes 2 and the connecting flat steel plates 8, wherein the welding pin connectors 1 are arranged along the surfaces of the supporting leg steel pipes 2 at intervals of 22.5 degrees or 30 degrees or 45 degrees, and the welding pin connectors 1 are distributed at equal intervals along the connecting flat steel plates 8 at three equal points or four equal points.
(4) Pouring the concrete of the lower bearing platform: installing a concrete bottom die and a side die, binding a reinforcing steel bar net, pouring lower layer concrete of a lower bearing platform and curing. And after the curing reaches a certain strength, roughening the top surface of the lower concrete layer, and embedding an H-shaped steel cushion block and a leveling nut. And arranging a base on the leveling nut, hoisting a slideway, binding a reinforcing steel bar net and pouring micro-expansion concrete to finish the construction of the lower bearing platform.
(5) Installing a spherical hinge: and a lower spherical hinge is arranged above the base, polytetrafluoroethylene powder is coated on the surface of the lower spherical hinge, a shaft pin is hung in the center of the lower spherical hinge, and the upper spherical hinge is hung in a preset position and connected with the shaft pin.
(6) Mounting supporting leg structure, traction counterforce seat and sand box: a supporting leg structure is arranged above the slideway, vertically distributed steel bars 4 are welded in the supporting leg structure, C50 micro-expansion concrete is filled in the supporting leg steel pipe 2, and polypropylene fibers are doped in the micro-expansion concrete; and setting a traction counterforce seat and a sand box at a preset position according to a design drawing.
(7) Binding an upper bearing platform rib net: binding a reinforcing steel bar net at the caulking groove of the upper spherical hinge according to a design drawing, and connecting the caulking groove reinforcing steel bar net and the reinforcing steel bar net of the upper bearing platform into a whole.
(8) Pouring the concrete of the upper bearing platform: and pouring tapered concrete on the side face of the lower spherical hinge, installing a steel pipe support along the periphery of the tapered concrete, and erecting a template on the steel pipe support. And reserving longitudinal and transverse prestress corrugated pipes, and pouring and tamping concrete after the caulking groove reinforcing steel bar net and the bearing platform reinforcing steel bar net are bound. During pouring, attention is paid to the use of vibrating equipment to prevent collision damage. And curing after the concrete pouring is completed.
In the first embodiment of the present invention, the steps (1), (2), (3) and (4) are preferably performed synchronously; when the distance between the supporting leg steel pipes 2 in the step (2) is larger, a partition plate 7 is required to be arranged between the connecting flat steel plates 8; and (3) placing the supporting foot structure in the step (6) on the temporary wooden cushion layer, and taking down the cushion layer after the supporting foot structure and the upper bearing platform are concreted into a whole, so that a gap of 20mm is reserved between the bottom surface of the supporting foot structure walking plate 6 and the top surface of the annular slideway.
The invention and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the invention as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present invention.

Claims (10)

1. The utility model provides a bridge spike connects reliable cushion cap structure of turning, includes cushion cap, lower cushion cap, spherical hinge, spike structure, its characterized in that: the supporting leg structure consists of two side-by-side supporting leg steel pipes, the supporting leg steel pipes are connected through two connecting flat steel plates, and welding nail connecting pieces are arranged on the outer sides of the supporting leg steel pipes and the connecting flat steel plates;
spiral stirrups are arranged around the supporting leg steel pipe, vertical distribution reinforcing steel bars are arranged on the inner side of the spiral stirrups at intervals along the periphery, and the supporting leg structure is connected with a bearing platform into a whole through cast-in-place concrete.
2. The swivel-cap structure with reliable bridge foot connection according to claim 1, wherein: two ends of two connecting flat steel plates of the supporting leg structure are provided with oblique round holes, the spiral stirrups penetrate through the oblique round holes, and the vertically distributed steel bars and the spiral stirrups are connected into a whole through welding or binding.
3. The swivel-cap structure with reliable bridge foot connection according to claim 1, wherein: the plane projection radius of the spiral stirrup is 10 mm-50 mm larger than the radius of the steel tube of the supporting leg, the vertical distance of the spiral stirrup is 40mm-80mm, and the diameter of the spiral stirrup is not smaller than 8mm.
4. The swivel-cap structure with reliable bridge foot connection according to claim 1, wherein: the welding pin connecting pieces are round-head welding pins, the lengths of the welding pin connecting pieces are 60-200 mm, the nominal diameters of the welding pin connecting pieces are 10-19 mm, the welding pin connecting pieces are perpendicular to the surfaces of the supporting leg steel pipes and are connected with the surfaces of the flat steel plates for welding, the welding pin connecting pieces are arranged along the surfaces of the supporting leg steel pipes at intervals of 22.5 degrees or 30 degrees or 45 degrees, and the welding pin connecting pieces are distributed at equal intervals along the surfaces of the flat steel plates.
5. The swivel-cap structure with reliable bridge foot connection according to claim 1, wherein: a partition plate is arranged between the two connecting flat steel plates, and the partition plates are arranged along the connecting line direction of the middle parts of the connecting flat steel plates.
6. The swivel-cap structure with reliable bridge foot connection according to claim 1, wherein: the supporting leg structure is arranged on the center line of a circular slideway taking the center of the spherical hinge as the center of a circle, and the supporting leg structure is arranged at intervals of 45 degrees or 60 degrees.
7. The swivel-cap structure with reliable bridge foot connection according to claim 1, wherein: the bottom of the supporting leg structure is provided with a walking plate, the walking plate is a segment annular steel plate, the walking plate is tilted by 10-15 degrees along the two ends of the annular direction, and the thickness of the walking plate is 25-35 mm; a gap of 10-20 mm is reserved between the bottom surface of the walking board and the top surface of the annular slideway, and the top plate of the annular slideway is composed of a polytetrafluoroethylene sliding plate, a stainless steel plate and a slideway steel plate from top to bottom.
8. The swivel-cap structure with reliable bridge foot connection according to claim 1, wherein: c50 micro-expansion concrete is filled in the supporting leg steel tube, and polypropylene fibers are doped in the micro-expansion concrete.
9. The construction method of the swivel bearing platform structure with reliable bridge supporting foot connection is characterized by comprising the following steps of:
(1) Manufacturing a spherical hinge support: prefabricating a spherical hinge-shaped support according to the actual bearing capacity requirement of the on-site swivel engineering, wherein the spherical hinge-shaped support comprises annular stiffening ribs and radial stiffening ribs;
(2) Manufacturing a bridge supporting leg structure: determining the structural size of the bridge supporting feet according to the actual bearing capacity requirement of the on-site swivel engineering, arranging round holes on the connecting flat steel plates, and welding the connecting flat steel plates, the supporting foot steel pipes and the walking plates into a whole;
(3) Welding the welding nail connecting piece: welding nail connecting pieces perpendicular to the surface of the supporting leg steel pipe and connected with the surface of the flat steel plate according to a design drawing and strictly according to the national current safety technology, wherein the welding nail connecting pieces are arranged at intervals of 22.5 degrees or 30 degrees or 45 degrees along the surface of the supporting leg steel pipe, and the welding nail connecting pieces are distributed at equal intervals along the three-equal-dividing points or the four-equal-dividing points of the surface of the flat steel plate;
(4) Pouring the concrete of the lower bearing platform: installing a concrete bottom die and a side die, binding a reinforcing steel bar net, pouring lower layer concrete of a lower bearing platform and curing. After the curing reaches a certain strength, roughening the top surface of the lower concrete layer, and embedding an H-shaped steel cushion block and a leveling nut in advance; arranging a base on the leveling nut, hoisting a slideway, binding a reinforcing steel bar net and pouring micro-expansion concrete to finish the construction of a lower bearing platform;
(5) Installing a spherical hinge: a lower spherical hinge is arranged above the base, polytetrafluoroethylene powder is required to be smeared on the surface of the lower spherical hinge, a shaft pin is hung in the center of the lower spherical hinge, and the upper spherical hinge is hung in a preset position and connected with the shaft pin;
(6) Mounting supporting leg structure, traction counterforce seat and sand box: a supporting leg structure is arranged above the slideway, vertical steel bars are welded in the supporting leg structure, and C50 micro-expansion concrete doped with polypropylene fibers is filled in the supporting leg steel pipe; setting a traction counterforce seat and a sand box at a preset position according to a design drawing;
(7) Binding an upper bearing platform rib net: binding a reinforcing steel bar net at the caulking groove of the upper spherical hinge according to a design drawing, and connecting the caulking groove reinforcing steel bar net and the reinforcing steel bar net of the upper bearing platform into a whole.
(8) Pouring the concrete of the upper bearing platform: and pouring tapered concrete on the side face of the lower spherical hinge, installing a steel pipe support along the periphery of the tapered concrete, and erecting a template on the steel pipe support. And reserving longitudinal and transverse prestress corrugated pipes, and pouring and tamping concrete after the caulking groove reinforcing steel bar net and the bearing platform reinforcing steel bar net are bound. During pouring, attention is paid to the use of vibrating equipment to prevent collision damage. And curing after the concrete pouring is completed.
10. The construction method of the swivel bearing platform structure with reliable bridge foot connection according to claim 9, wherein the construction method comprises the following steps: the steps (1), (2), (3) and (4) are preferably constructed synchronously; when the distance between the supporting leg steel pipes in the step (2) is larger, a partition plate is required to be arranged between the connecting flat steel plates; and (3) placing the supporting foot structure in the step (6) on the temporary wooden cushion layer, and taking down the cushion layer after the supporting foot structure and the upper bearing platform are concreted into a whole, so that a gap of 20mm is reserved between the bottom surface of the walking board of the supporting foot structure and the top surface of the annular slideway.
CN202211104040.1A 2022-09-09 2022-09-09 Swivel bearing platform structure with reliable bridge supporting leg connection and construction method Pending CN116254865A (en)

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CN202211104040.1A CN116254865A (en) 2022-09-09 2022-09-09 Swivel bearing platform structure with reliable bridge supporting leg connection and construction method

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