CN113638323A - Reinforced concrete plane turning arch bridge concrete grinding core construction method - Google Patents
Reinforced concrete plane turning arch bridge concrete grinding core construction method Download PDFInfo
- Publication number
- CN113638323A CN113638323A CN202110966122.6A CN202110966122A CN113638323A CN 113638323 A CN113638323 A CN 113638323A CN 202110966122 A CN202110966122 A CN 202110966122A CN 113638323 A CN113638323 A CN 113638323A
- Authority
- CN
- China
- Prior art keywords
- grinding
- grinding core
- steel
- concrete
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 174
- 239000010959 steel Substances 0.000 claims abstract description 174
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 18
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 11
- 238000005498 polishing Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002023 wood Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 11
- 239000011241 protective layer Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 description 3
- 238000011900 installation process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
Classifications
-
- 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
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a reinforced concrete plane turning arch bridge concrete grinding core construction method, and relates to the technical field of reinforced concrete. The invention comprises grinding core steel shaft positioning, grinding core manufacturing, grinding core mounting and grinding core primary grinding, wherein the grinding core steel shaft positioning comprises the following steps: the method comprises the following steps: positioning the grinding core steel shaft on a pre-buried steel plate of the lower rotary table for pouring concrete for the first time, and performing the second step: and when the first concrete is poured, the total station is utilized to accurately position the plane position and the elevation of the embedded steel plate, so that the plane position deviation is within the range of +/-5 mm, and the elevation is controlled within the range of +/-2 mm. The invention carries out installation by the belt grinding when binding the top layer steel bar of the grinding core, strictly controls the thickness of the protective layer of the grinding core, and further ensures that the thickness deviation of the protective layer only has positive deviation, thereby preventing the steel bar from being exposed in the grinding process of the grinding core, completely grinding the grinding core and the grinding cover, ensuring that the rotary body section can normally rotate, and avoiding the instability of the rotary body.
Description
Technical Field
The invention belongs to the technical field of reinforced concrete, and particularly relates to a reinforced concrete plane turning arch bridge concrete grinding core construction method.
Background
The existing reinforced concrete grinding core construction method has certain defects, the existing reinforced concrete grinding core often has the defects that the grinding core and a grinding cover cannot be ground in the construction process, and finally, the driving force of a rotating body is increased, the rotating body is unstable, so that the rotating body section cannot rotate, and the application range is limited.
Disclosure of Invention
The invention aims to provide a reinforced concrete plane swivel arch bridge concrete grinding core construction method, which solves the existing problems: the existing reinforced concrete grinding core often cannot be ground into the grinding core and the grinding cover during construction, the driving force of a rotating body is increased, the rotating body is unstable, the rotating body section cannot rotate, and the application range is limited.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a reinforced concrete plane rotation arch bridge concrete grinding core construction method, which comprises grinding core steel shaft positioning, grinding core manufacturing, grinding core installation and grinding core primary grinding, wherein the grinding core steel shaft positioning comprises the following steps:
the method comprises the following steps: positioning the grinding core steel shaft on an embedded steel plate of the lower turntable for the first concrete pouring;
step two: accurately positioning the plane position and the elevation of the embedded steel plate by using a total station during the first concrete pouring, so that the plane position deviation is within the range of +/-5 mm, and the elevation is controlled within the range of +/-2 mm;
step three: after the concrete is solidified for the first time, chiseling the concrete around the grinding core reserved area, and then cleaning the reserved area;
step four: then, four longitudinal and transverse axis points are determined at the same distance on four sides of the embedded steel plate by using a total station;
step five: the grinding center steel shaft is adjusted to the center and kept vertical through a plumb bob;
step six: then, temporarily fixing the grinding core steel shaft and the embedded steel plate through spot welding by using short steel bars;
step seven: then, taking the lower turntable steel bars chiseled out from the edge of the hole wall as acting points, connecting the upper parts of the grinding core steel shafts by using three turn bolts, and screwing the turn bolts;
step eight: and after the position and the verticality of the grinding core steel shaft are checked to be accurate and correct by using a total station, welding the embedded steel plate and the grinding core steel shaft by using a steel batten plate.
Further, the grinding core manufacturing method comprises the following steps:
the method comprises the following steps: the spherical surface of the grinding core is formed by a bus device which is customized according to the designed spherical diameter, and the bus device is formed by welding a steel sleeve and a curved plate;
step two: the inner diameter of the steel sleeve is the same as the outer diameter of the grinding core steel shaft exposed out of the top surface of the spherical hinge, the outer layer of the curved plate is an arc-shaped steel plate, a screw is drilled on the surface of the curved plate, the inner layer of the curved plate is connected with the arc-shaped wood plate, the exposed surface of the arc-shaped wood plate is planed, and the curvature radius is the same as the radius of the curved surface of the spherical hinge;
step three: before concrete is poured in concrete operation, 3 pieces of phi 10 straight steel bars with the length of 10cm are cut, one end of each straight steel bar is polished to be smooth, the straight steel bars are vertically adhered and welded on the outer wall of a grinding core steel shaft at an included angle of about 120 degrees, and the polished end faces upwards and is as same as the top of the grinding core;
step four: when concrete is poured on the top surface of the grinding core, sleeving the bus plate on the grinding core steel shaft, slowly rotating the bus plate, firstly, rotatably cutting the concrete into a spherical surface shape, and then, roughly smearing the spherical surface to be smooth;
step five: and (5) after the concrete operation is finished and the surface of the spherical hinge is slightly dry, pressing and polishing the surface of the spherical hinge by using an iron trowel until the curved surface of the spherical hinge is smooth and round.
Further, the burr mounting comprises the steps of:
the method comprises the following steps: integrally binding and molding the grinding core steel bars, and then hoisting the grinding core steel bars to the grinding core position;
step two: then welding and connecting the radial reinforcing steel bars of the grinding core and the reserved connecting reinforcing steel bars of the lower turntable;
step three: then selecting an annular steel plate with the same inner diameter as the grinding center, ensuring that the concentric circle of the annular steel plate does not deform by adopting an inner supporting method, and installing and fixing the annular steel plate on the top surface of the lower turntable;
step four: accurately centering the annular steel plate by a total station cross centering method, so that the center of the annular steel plate is superposed with the center of the grinding center, and the error is controlled within 1 mm;
step five: the elevations of all the circumferential points of the annular steel plate are equal, and the steel plate and the embedded steel bars are welded and fixed after accurate adjustment.
Further, the grinding core primary grinding comprises the following steps:
the method comprises the following steps: when the grinding core concrete is initially set, sleeving the bus plate on the grinding core steel shaft, rotating the bus plate and grinding the grinding core by using a grinding machine;
step two: the grinding is based on the condition that a toothless steel saw blade with the thickness of 1mm can be uniformly moved between the bus plate and the surface of the grinding core;
step three: after the grinding reaches the standard, using a triangular oilstone to finely grind and smooth the rough part on the surface of the grinding core;
step four: after the grinding core concrete is finally set, drawing concentric circles on the grinding core at equal intervals of 10cm by taking a grinding core steel shaft as the center, equally dividing the concentric circles into latitude and longitude lines on a grinding core spherical segment body according to a 10-degree central angle on the concentric circles, and repeatedly measuring the elevation of the intersection point of the same latitude by using a precise optical leveling instrument so as to check the curvature of each direction on the arc surface;
step five: and (4) manually polishing the non-smooth part on the arc surface until the elevation between every two points is controlled within +/-1 mm.
The invention has the following beneficial effects:
1. the invention installs the grinding head when binding the top layer of the grinding core, strictly controls the thickness of the protective layer of the grinding core, and further ensures that the thickness deviation of the protective layer only has positive deviation, thereby preventing the reinforcing steel bar from being exposed in the grinding process of the grinding core, completely grinding the grinding core and the grinding cover, enabling the rotary section to normally rotate and avoiding the unstable rotation.
2. The distance between the reinforcing steel bars is strictly controlled in the process of installing the grinding core reinforcing steel bars, and meshes of the reinforcing steel bars between each layer of reinforcing steel bars are ensured to correspond, so that the vibrating rod can be placed below the grinding core to vibrate in the concrete pouring process, and the compactness of the grinding core concrete is ensured.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the installation and positioning of the steel spindle of the present invention;
FIG. 2 is a view of the construction of the bus bar apparatus of the present invention;
FIG. 3 is a schematic plan view of the elevation measurement of the grinding core according to the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-3, the invention relates to a reinforced concrete plane swivel arch bridge concrete grinding core construction method, which comprises grinding core steel shaft positioning, grinding core manufacturing, grinding core installation and grinding core primary grinding, wherein the grinding core steel shaft positioning comprises the following steps:
the method comprises the following steps: positioning the grinding core steel shaft on an embedded steel plate of the lower turntable for the first concrete pouring;
step two: accurately positioning the plane position and the elevation of the embedded steel plate by using a total station during the first concrete pouring, so that the plane position deviation is within the range of +/-5 mm, and the elevation is controlled within the range of +/-2 mm;
step three: after the concrete is solidified for the first time, chiseling the concrete around the grinding core reserved area, and then cleaning the reserved area;
step four: then, four longitudinal and transverse axis points are determined at the same distance on four sides of the embedded steel plate by using a total station;
step five: the grinding center steel shaft is adjusted to the center and kept vertical through a plumb bob;
step six: then, temporarily fixing the grinding core steel shaft and the embedded steel plate through spot welding by using short steel bars;
step seven: then, taking the lower turntable steel bars chiseled out from the edge of the hole wall as acting points, connecting the upper parts of the grinding core steel shafts by using three turn bolts, and screwing the turn bolts;
step eight: and after the position and the verticality of the grinding core steel shaft are checked to be accurate and correct by using a total station, welding the embedded steel plate and the grinding core steel shaft by using a steel batten plate.
The grinding core manufacturing method comprises the following steps:
the method comprises the following steps: the spherical surface of the grinding core is formed by a bus device which is customized according to the designed spherical diameter, and the bus device is formed by welding a steel sleeve and a curved plate;
step two: the inner diameter of the steel sleeve is the same as the outer diameter of the grinding core steel shaft exposed out of the top surface of the spherical hinge, the outer layer of the curved plate is an arc-shaped steel plate, a screw is drilled on the surface of the curved plate, the inner layer of the curved plate is connected with the arc-shaped wood plate, the exposed surface of the arc-shaped wood plate is planed, and the curvature radius is the same as the radius of the curved surface of the spherical hinge;
step three: before concrete is poured in concrete operation, 3 pieces of phi 10 straight steel bars with the length of 10cm are cut, one end of each straight steel bar is polished to be smooth, the straight steel bars are vertically adhered and welded on the outer wall of a grinding core steel shaft at an included angle of about 120 degrees, and the polished end faces upwards and is as same as the top of the grinding core;
step four: when concrete is poured on the top surface of the grinding core, sleeving the bus plate on the grinding core steel shaft, slowly rotating the bus plate, firstly, rotatably cutting the concrete into a spherical surface shape, and then, roughly smearing the spherical surface to be smooth;
step five: and (5) after the concrete operation is finished and the surface of the spherical hinge is slightly dry, pressing and polishing the surface of the spherical hinge by using an iron trowel until the curved surface of the spherical hinge is smooth and round.
The installation of the grinding core comprises the following steps:
the method comprises the following steps: integrally binding and molding the grinding core steel bars, and then hoisting the grinding core steel bars to the grinding core position;
step two: then welding and connecting the radial reinforcing steel bars of the grinding core and the reserved connecting reinforcing steel bars of the lower turntable;
step three: then selecting an annular steel plate with the same inner diameter as the grinding center, ensuring that the concentric circle of the annular steel plate does not deform by adopting an inner supporting method, and installing and fixing the annular steel plate on the top surface of the lower turntable;
step four: accurately centering the annular steel plate by a total station cross centering method, so that the center of the annular steel plate is superposed with the center of the grinding center, and the error is controlled within 1 mm;
step five: the elevations of all the circumferential points of the annular steel plate are equal, and the steel plate and the embedded steel bars are welded and fixed after accurate adjustment.
The grinding core primary grinding comprises the following steps:
the method comprises the following steps: when the grinding core concrete is initially set, sleeving the bus plate on the grinding core steel shaft, rotating the bus plate and grinding the grinding core by using a grinding machine;
step two: the grinding is based on the condition that a toothless steel saw blade with the thickness of 1mm can be uniformly moved between the bus plate and the surface of the grinding core;
step three: after the grinding reaches the standard, using a triangular oilstone to finely grind and smooth the rough part on the surface of the grinding core;
step four: after the grinding core concrete is finally set, drawing concentric circles on the grinding core at equal intervals of 10cm by taking a grinding core steel shaft as the center, equally dividing the concentric circles into latitude and longitude lines on a grinding core spherical segment body according to a 10-degree central angle on the concentric circles, and repeatedly measuring the elevation of the intersection point of the same latitude by using a precise optical leveling instrument so as to check the curvature of each direction on the arc surface;
step five: and (4) manually polishing the non-smooth part on the arc surface until the elevation between every two points is controlled within +/-1 mm.
Grinding steel bars are processed strictly according to a drawing, construction is carried out strictly according to the drawing in the steel bar installation process, the distance between the grinding steel bars is properly adjusted at the position where the lower turntable steel bars conflict with each other, the steel bars cannot be cut absolutely, the distance between the steel bars is strictly controlled in the grinding steel bar installation process, and the mesh of the steel bars between each layer of steel bars is ensured to correspond, so that a vibrating rod can be placed below the grinding center to vibrate in the concrete pouring process, the grinding concrete is ensured to be dense, grinding is carried out during binding of the top layer of the grinding center steel bars, the thickness of a protective layer of the grinding center is strictly controlled, the thickness deviation of the protective layer can only have positive deviation, the steel bars are prevented from being exposed in the grinding process, the grinding center and a grinding cover cannot be ground if the grinding steel bars are exposed, finally, the driving force of a rotating body is increased, the rotating body is unstable, and even the rotating body section cannot rotate, the swivel fails.
One specific application of this embodiment is: positioning a grinding steel shaft on an embedded steel plate of a lower turntable for the first concrete pouring, accurately positioning the plane position and the elevation of the embedded steel plate by using a total station when the first concrete is poured, ensuring that the plane position deviation is within a range of +/-5 mm and the elevation is controlled within a range of +/-2 mm, roughening concrete on the periphery of a reserved grinding area after the first concrete is solidified, cleaning the reserved area, then determining four longitudinal and transverse axis points by using the total station at the same distance on the four sides of the embedded steel plate, moving the grinding steel shaft forwards, backwards, leftwards and rightwards, adjusting the grinding steel shaft to the center, keeping the grinding steel shaft vertical by using a plumb bob, temporarily fixing the grinding steel shaft and the embedded steel plate by using short steel bars through spot welding, using a turntable steel bar on the side of a hole wall as an exposure force point, connecting three basket bolts with the upper part of the grinding steel shaft, screwing the basket bolts, checking the position and the perpendicularity of the grinding steel shaft by using the total station to be accurate, welding an embedded steel plate and a grinding core steel shaft by using a steel batten plate, forming the spherical surface of a grinding core by a bus device customized according to the designed spherical diameter, wherein the bus device is formed by welding a steel sleeve and a curved plate, the inner diameter of the steel sleeve is the same as the outer diameter of the grinding core steel shaft exposing the top surface of a spherical hinge, the outer layer of the curved plate is an arc-shaped steel plate, drilling a screw on the surface, connecting an arc-shaped wood plate at the inner layer, planing the exposed surface of the arc-shaped wood plate, the curvature radius is the same as the radius of the spherical hinge curved surface, cutting 3 phi 10 straight steel bars with the length of 10cm before concrete is poured in concrete operation, polishing one end of each straight steel bar, vertically welding the straight steel bars on the outer wall of the grinding core steel shaft at an included angle of about 120 degrees, enabling the polishing end to be upward and be the same as the top of the concrete grinding core, sleeving the bus plate on the grinding core steel shaft when the top surface of the concrete is poured, slowly rotating the bus plate, firstly spinning the concrete into a spherical surface shape, then smoothing the spherical surface, finishing the concrete operation, when the surface of the spherical hinge is slightly dry, rolling and press polishing the surface of the spherical hinge by using an iron trowel until the curved surface of the spherical hinge is smooth and smooth, integrally binding and forming a grinding center steel bar, hoisting the grinding center steel bar to the position of the grinding center, welding and connecting the radial steel bar of the grinding center with a reserved stub steel bar of a lower turntable, selecting an annular steel plate with the same inner diameter as the grinding center, ensuring that the concentric circle of the annular steel plate is not deformed by adopting an internal bracing method, installing and fixing the annular steel plate on the top surface of the lower turntable, accurately centering the annular steel plate by using a total station cross centering method, ensuring that the center of the annular steel plate is superposed with the center of the grinding center, controlling the error within 1mm, ensuring that the elevations of all points on the circumference of the annular steel plate are equal, welding and fixing the steel plate and an embedded steel bar after accurate adjustment, sleeving the bus plate on a grinding center steel shaft when the concrete of the grinding center is initially set, rotating the bus plate, grinding the grinding center by using a grinding machine, and grinding the grinding center so as to uniformly move a toothless steel saw blade with the thickness of 1mm between the bus plate and the surface of the grinding center, after grinding to reach the standard, using triangular oilstone to finely grind and smooth rough parts on the surface of the grinding core, after concrete of the grinding core is finally set, drawing concentric circles on the grinding core at equal intervals of 10cm by taking a steel shaft of the grinding core as the center, equally dividing the concentric circles into longitude and latitude lines on the defect body of the grinding core according to a central angle of 10 degrees on the concentric circles, repeatedly measuring the elevation of the intersection point of the same latitude by using a precise optical leveling instrument to check the curvature of each direction on the arc surface, and manually grinding the non-circular and non-smooth parts on the arc surface until the elevation between each two points is controlled within +/-1 mm.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (4)
1. A reinforced concrete plane rotation arch bridge concrete grinding construction method comprises grinding steel shaft positioning, grinding manufacturing, grinding installation and grinding initial grinding, and is characterized in that: the positioning of the grinding core steel shaft comprises the following steps:
the method comprises the following steps: positioning the grinding core steel shaft on an embedded steel plate of the lower turntable for the first concrete pouring;
step two: accurately positioning the plane position and the elevation of the embedded steel plate by using a total station during the first concrete pouring, so that the plane position deviation is within the range of +/-5 mm, and the elevation is controlled within the range of +/-2 mm;
step three: after the concrete is solidified for the first time, chiseling the concrete around the grinding core reserved area, and then cleaning the reserved area;
step four: then, four longitudinal and transverse axis points are determined at the same distance on four sides of the embedded steel plate by using a total station;
step five: the grinding center steel shaft is adjusted to the center and kept vertical through a plumb bob;
step six: then, temporarily fixing the grinding core steel shaft and the embedded steel plate through spot welding by using short steel bars;
step seven: then, taking the lower turntable steel bars chiseled out from the edge of the hole wall as acting points, connecting the upper parts of the grinding core steel shafts by using three turn bolts, and screwing the turn bolts;
step eight: and after the position and the verticality of the grinding core steel shaft are checked to be accurate and correct by using a total station, welding the embedded steel plate and the grinding core steel shaft by using a steel batten plate.
2. The reinforced concrete plane swivel arch bridge concrete grinding core construction method according to claim 1, characterized in that: the grinding core manufacturing method comprises the following steps:
the method comprises the following steps: the spherical surface of the grinding core is formed by a bus device which is customized according to the designed spherical diameter, and the bus device is formed by welding a steel sleeve and a curved plate;
step two: the inner diameter of the steel sleeve is the same as the outer diameter of the grinding core steel shaft exposed out of the top surface of the spherical hinge, the outer layer of the curved plate is an arc-shaped steel plate, a screw is drilled on the surface of the curved plate, the inner layer of the curved plate is connected with the arc-shaped wood plate, the exposed surface of the arc-shaped wood plate is planed, and the curvature radius is the same as the radius of the curved surface of the spherical hinge;
step three: before concrete is poured in concrete operation, 3 pieces of phi 10 straight steel bars with the length of 10cm are cut, one end of each straight steel bar is polished smoothly, the straight steel bars are vertically adhered and welded on the outer wall of a grinding core steel shaft at an included angle of 120 degrees, and the polished end faces upwards and is as same as the top of the grinding core;
step four: when concrete is poured on the top surface of the grinding core, sleeving the bus plate on the grinding core steel shaft, slowly rotating the bus plate, firstly, rotatably cutting the concrete into a spherical surface shape, and then, roughly smearing the spherical surface to be smooth;
step five: and (5) after the concrete operation is finished and the surface of the spherical hinge is slightly dry, pressing and polishing the surface of the spherical hinge by using an iron trowel until the curved surface of the spherical hinge is smooth and round.
3. The reinforced concrete plane swivel arch bridge concrete grinding core construction method according to claim 1, characterized in that: the grinding core mounting comprises the following steps:
the method comprises the following steps: integrally binding and molding the grinding core steel bars, and then hoisting the grinding core steel bars to the grinding core position;
step two: then welding and connecting the radial reinforcing steel bars of the grinding core and the reserved connecting reinforcing steel bars of the lower turntable;
step three: then selecting an annular steel plate with the same inner diameter as the grinding center, ensuring that the concentric circle of the annular steel plate does not deform by adopting an inner supporting method, and installing and fixing the annular steel plate on the top surface of the lower turntable;
step four: accurately centering the annular steel plate by a total station cross centering method, so that the center of the annular steel plate is superposed with the center of the grinding center, and the error is controlled within 1 mm;
step five: the elevations of all the circumferential points of the annular steel plate are the same, and the steel plate and the embedded steel bars are welded and fixed after accurate adjustment.
4. The reinforced concrete plane swivel arch bridge concrete grinding core construction method according to claim 1, characterized in that: the grinding core primary grinding comprises the following steps:
the method comprises the following steps: when the grinding core concrete is initially set, sleeving the bus plate on the grinding core steel shaft, rotating the bus plate and grinding the grinding core by using a grinding machine;
step two: the grinding is based on a toothless steel saw blade with the thickness of 1mm which is uniformly moved between the bus plate and the surface of the grinding core;
step three: after the grinding reaches the standard, using a triangular oilstone to finely grind and smooth the rough part on the surface of the grinding core;
step four: after the grinding core concrete is finally set, drawing concentric circles on the grinding core at the same interval of 10cm by taking a grinding core steel shaft as the center, equally dividing the concentric circles into latitude and longitude lines on a grinding core spherical segment body according to a 10-degree central angle on the concentric circles, and repeatedly measuring the elevation of the intersection point of the same latitude by using a precise optical leveling instrument so as to check the curvature of each direction on the arc surface;
step five: and (4) manually polishing the non-smooth part on the arc surface until the elevation between every two points is controlled within +/-1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110966122.6A CN113638323A (en) | 2021-08-23 | 2021-08-23 | Reinforced concrete plane turning arch bridge concrete grinding core construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110966122.6A CN113638323A (en) | 2021-08-23 | 2021-08-23 | Reinforced concrete plane turning arch bridge concrete grinding core construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113638323A true CN113638323A (en) | 2021-11-12 |
Family
ID=78423356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110966122.6A Pending CN113638323A (en) | 2021-08-23 | 2021-08-23 | Reinforced concrete plane turning arch bridge concrete grinding core construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113638323A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008044240A1 (en) * | 2006-10-12 | 2008-04-17 | Jitendra Ishwarbhai Mevada | Automatic grinding/buffing machine for rubber cot arbors |
| US20100003904A1 (en) * | 2000-11-17 | 2010-01-07 | Duescher Wayne O | High speed flat lapping platen, raised islands and abrasive beads |
| CN102041783A (en) * | 2010-06-17 | 2011-05-04 | 吴江市明港道桥工程有限公司 | Device for water-carrying grinding-in of grinding core and grinding cover of spherical hinge used in bridge rotation construction |
| CN102359064A (en) * | 2011-10-26 | 2012-02-22 | 中铁二十四局集团福建铁路建设有限公司 | Reinforced concrete spherical hinge structure of swing bridge and manufacturing process thereof |
-
2021
- 2021-08-23 CN CN202110966122.6A patent/CN113638323A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100003904A1 (en) * | 2000-11-17 | 2010-01-07 | Duescher Wayne O | High speed flat lapping platen, raised islands and abrasive beads |
| WO2008044240A1 (en) * | 2006-10-12 | 2008-04-17 | Jitendra Ishwarbhai Mevada | Automatic grinding/buffing machine for rubber cot arbors |
| CN102041783A (en) * | 2010-06-17 | 2011-05-04 | 吴江市明港道桥工程有限公司 | Device for water-carrying grinding-in of grinding core and grinding cover of spherical hinge used in bridge rotation construction |
| CN102359064A (en) * | 2011-10-26 | 2012-02-22 | 中铁二十四局集团福建铁路建设有限公司 | Reinforced concrete spherical hinge structure of swing bridge and manufacturing process thereof |
Non-Patent Citations (1)
| Title |
|---|
| 秦富鹏: "磨心磨盖制作技术在贵州花江大桥转体施工中的应用", 《科技风》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110409317B (en) | Swivel spherical hinge and mounting method thereof | |
| CN106320715B (en) | A kind of construction method of installation of the I-shaped inclined-plane built-in fitting of large size | |
| US4109635A (en) | Machine grooved joint on hollow concrete cylinders | |
| CN113638323A (en) | Reinforced concrete plane turning arch bridge concrete grinding core construction method | |
| CN110295620B (en) | Rapid and accurate positioning method for integral skid-mounted cold box of large air separation device | |
| CN113856837A (en) | Installation construction method of ball mill | |
| CN103835373A (en) | Annulated column cap embedded part and construction method thereof | |
| CN111792522A (en) | Construction method for improving horizontal precision of crane beam steel rail top | |
| CN105089216A (en) | Three-dimensional positioning decoration construction method for spiral staircase stone facing | |
| CN210713862U (en) | Temporary supporting device of large-span truss | |
| JP7165592B2 (en) | Sand casting apparatus for casting pipe and method for positioning the core on metal frame | |
| CN112458905A (en) | Splicing adjustment method for prefabricated capping beam and prefabricated stand column | |
| CN109243626B (en) | ACP1000 nuclear power pressure vessel cylinder heat-insulating layer installation method | |
| JP4511862B2 (en) | Glass tube manufacturing method and manufacturing apparatus | |
| JPS63501938A (en) | Zero position adjustment method for cylindrical grinder and device for implementing the method | |
| CN102513891A (en) | Composite material plate-and-shell structure arbitrary-angle conical hole positioning grinding device and method | |
| US5980171A (en) | Method and apparatus for milling crankshafts | |
| JP5641948B2 (en) | Posture stabilizer and tube processing method | |
| CN114776015B (en) | Butt joint method of water inlet flow passage and metal ring | |
| CN110216427B (en) | Method for machining and mounting base of straight blade paddle device | |
| CN110480231B (en) | Combined positioning tool for converter supporting seat and using method thereof | |
| CN110453608B (en) | Prefabricated upright post mounting method | |
| CA2508737A1 (en) | Press head assembly for concrete pipe making machine | |
| CN110090475A (en) | A kind of method of quick adjusting automatic rake-lifting concentrator central axis centering | |
| CN111021261A (en) | Method for improving installation precision of swivel ball winch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211112 |
|
| RJ01 | Rejection of invention patent application after publication |