CN112267687A - Manufacturing method of movable prestress tensioning and shoring combined device - Google Patents
Manufacturing method of movable prestress tensioning and shoring combined device Download PDFInfo
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- CN112267687A CN112267687A CN202011110289.4A CN202011110289A CN112267687A CN 112267687 A CN112267687 A CN 112267687A CN 202011110289 A CN202011110289 A CN 202011110289A CN 112267687 A CN112267687 A CN 112267687A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 119
- 239000010959 steel Substances 0.000 claims abstract description 119
- 238000000034 method Methods 0.000 claims description 21
- 238000003466 welding Methods 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
Abstract
A manufacturing method of a movable prestress tensioning and shoring combined device is characterized by comprising the following steps: a. manufacturing a prestress tensioning shoring structure, b, manufacturing a movable support structure, c, assembling the movable prestress tensioning shoring structure, d, manufacturing a movable jack steel frame, and e, combining the movable prestress tensioning shoring device. The manufacturing method of the movable prestress tensioning and shoring combined device has the advantages of simple structure, convenience in manufacturing, safe and reliable engineering quality, suitability for tensioning of the overlong prestress steel strands, capability of simultaneously tensioning a plurality of steel strands to enable each steel strand to reach a prestress design value and safety design for preventing the steel strands from being broken off and rebounded.
Description
Technical Field
The invention relates to a prestress tensioning device, in particular to a manufacturing method of a movable prestress tensioning top bracing combined device.
Background
The parallel steel strand inhaul cable system is a system which takes a steel strand as a bearing cable body, takes a group anchor technology as a basis and utilizes a group anchor clamp to bear dynamic and static loads of an inhaul cable transmission structure. The steel strand stay cable system generally works in a low stress region of 0.30 Rb-0.45 Rb, and sometimes only 0.1Rb is used in the construction stage, so the anchoring efficiency of the anchor clamp is the key for ensuring the normal work of the steel strand stay cable in a low stress state. The parallel steel strand stay cable is generally manufactured and installed on site, steel strands penetrate through an anchorage device one by one in the process, are tensioned and pre-tightened to establish initial stress, and then are integrally adjusted to the designed tonnage (the designed tonnage is achieved by repeated tensioning of a single steel strand). When a single wire is pre-tightened, a repeated tensioning self-anchoring method is adopted in the past, namely a limiting plate is used, and when the tensioning is released, the clamping piece retracts along with the steel strand so as to achieve self-anchoring. When the process meets a long cable, the working clamping piece can not be used for repeatedly adjusting and clamping the steel strand, so that the clamping piece and the steel strand are damaged in different degrees, an anti-corrosion coating, scrap iron and the like on the surface of the steel strand of the cable fall off and are accumulated in a tooth gap of the clamping piece, the anchoring effect is influenced, a lot of time is spent on adjusting and clamping the steel strand, the production speed of the steel strand is prolonged, and the production efficiency is reduced.
Chinese patent CN106401196A discloses a steel strand tensioning device for a prestressed anchorage device in 2017, 2, 15, wherein the fixed end bracket is provided with a fixed anchorage device, the front end of the fixed anchorage device is provided with a limiting block, one side of the fixed end bracket is provided with a tension end bracket, a jack support is fixed in the middle of the stretching end bracket, a displacement block and a pushing block are respectively arranged on the left side and the right side of the jack support, the shifting block and the pushing block are fixedly connected through a screw rod, a shifting anchorage device is fixed on the shifting block, a hydraulic jack is arranged on the jack support seat, one side of a mandril of the jack is provided with a jacking block, the fixed anchorage device and the displacement anchorage device are connected through a steel strand, a tension sensor is arranged at one end of the steel strand, which is positioned on the displacement anchorage device, and a laser ranging device is arranged on one side, which is close to the displacement anchorage device, of the jack support. Although the device of the technical scheme is simple in structure and convenient to disassemble, and the device can be disassembled for use next time in the assembling process, when the steel strand tensioning device for the prestressed anchor is processed, the tensioning jacking adjusting process is required to be repeated once, so that the production speed of the steel strand is prolonged, and the production efficiency is reduced.
Therefore, when the prestress values of a plurality of steel strands designed in the same beam or other members are basically the same, how to manufacture a device which improves the production efficiency and achieves the prestress value becomes an urgent problem in engineering, especially for the device which stretches the ultra-long prestress steel strands to produce the same member in a plurality of batches.
Disclosure of Invention
The invention aims to provide a safe and reliable manufacturing method of a movable prestress tensioning and shoring combined device.
In order to achieve the purpose, the technical solution of the invention is as follows:
a manufacturing method of a movable prestress tensioning and shoring combined device is characterized by comprising the following steps:
a. the method for manufacturing the prestress tensioning top bracing structure comprises the following steps:
(1) manufacturing a rectangular front panel and a rectangular back panel of the steel plate frame box body, wherein the front panel and the back panel have the same structure, and the middle part of the panel of the steel plate frame box body is provided with a plurality of through holes according to design, and the through holes are used for penetrating steel strands;
(2) manufacturing rectangular two-side panels and end sealing plates at the upper end and the lower end of a steel plate frame box body;
(3) manufacturing a framework of a steel plate frame box body, and welding a plurality of steel plates with a front panel and a back panel according to the upper part, the middle part and the lower part of the steel plate frame box body to form a square middle framework between the front panel and the back panel;
(4) forming a prestress tensioning shoring structure, welding two side steel plates on two sides of a front panel and a back panel, welding an upper sealing plate and a lower sealing plate on the upper part and the lower part of a cylinder formed by the front panel, the back panel and the two side plates to form a box body structure internally provided with longitudinal and transverse supports, and forming the prestress tensioning shoring structure;
(5) the middle parts of two sides of the prestress tensioning shoring structure are respectively welded with a cantilever lug;
b. manufacturing a movable support structure, comprising the following steps:
(1) manufacturing a rectangular square steel frame to accommodate the prestress tensioning shoring structure, wherein a cross brace of the square steel frame is arranged at the middle lower part of the rectangular square steel frame and is used for placing a lug of the shoring structure;
(2) providing four universal wheels with the diameter of 100mm, wherein the universal wheels are arranged at four corners below a rectangular square steel frame chassis;
welding square steel of 40mm multiplied by 5mm into a square steel frame of 490mm multiplied by 640mm multiplied by 490mm, and installing 4 universal wheels (8) with the diameter of 100mm at the lower part to manufacture a movable chassis;
(3) welding the lower end of the steel plate frame box body and the rectangular square steel frame chassis together to form a movable support structure;
c. movable prestress tensioning and shoring structure assembly
(1) Placing the top bracing structure in the movable steel frame through the lifting lugs, and placing the lifting lugs on the cross braces of the steel frame;
(2) providing a plurality of steel sheets with the thickness of 2-5mm as backing plates and placing the backing plates at the bottom of the universal wheel so as to balance and adjust the jacking structure according to the requirement;
d. manufacturing a movable jack steel frame, wherein the movable jack steel frame has the same appearance structure and size as the movable steel frame manufactured in the steps a, b and c, the movable jack steel frame comprises four universal wheels arranged at the bottom of the movable jack steel frame, a square steel cross brace is welded at the upper part of the movable jack steel frame according to the design, and two jacks are respectively placed on the upper cross brace of the steel frame and a jack support of a chassis at the lower part of the steel frame to form the movable jack steel frame;
e. combined movable prestress tensioning top bracing device
The movable jack steel frame and the movable prestress tensioning and jacking structure are spliced together for combined use, so that the movable prestress tensioning and jacking device is achieved.
The manufacturing method of the movable prestress tensioning and shoring combined device can be further realized by adopting the following technical measures.
In the method, the through holes are all polished smooth.
In the method, the thickness of the front panel is greater than or equal to 20 mm.
In the method, the thickness of the side plate is greater than or equal to 20 mm.
In the method, the thickness of the end sealing plate is more than or equal to 20 mm.
The method, wherein the diameter of the universal wheel is more than or equal to 100 mm.
The method wherein the jack is a hydraulic jack.
After the technical scheme is adopted, the manufacturing method of the movable prestress tensioning and shoring combined device has the following advantages:
1. the device has simple structure and convenient manufacture;
2. the engineering quality is safe and reliable, the method is suitable for tensioning the overlong prestressed steel strands, a plurality of steel strands can be tensioned simultaneously, each steel strand reaches the designed prestress value, and the safety design for preventing the steel strands from being broken off and rebounding is arranged.
Drawings
FIG. 1 is a schematic structural view of a front vertical surface and a back vertical surface of a prestressed shoring structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of an internal steel plate lattice support structure of the prestressed shoring structure according to an embodiment of the present invention;
FIG. 3 is a perspective view of FIG. 2;
fig. 4 is a schematic structural diagram of a movable jack according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1
The invention relates to a manufacturing method of a movable prestress tensioning and shoring combined device, which comprises the following steps:
firstly, pre-processing and manufacturing the prestressed tensioning shoring structure 6
1. Two steel plates 2 with the thickness of 250mm multiplied by 1900mm multiplied by 20mm are taken as a front panel and a back panel, a part 900mm away from two side ends is 37mm in the middle, four points of 58mm, 59mm and 58mm are taken as circle centers, a round hole 1 with the diameter of 20mm is opened (a round hole with the diameter of 20mm is opened according to actual requirements, a steel strand with the diameter of 15.2mm is penetrated in the project), and meanwhile, 12 rows of round holes with the diameter of 20mm are uniformly distributed upwards at the interval of 61mm by taking the circle centers of the four points as reference points. Two points of intersection of the middle steel plate, which are 65mm away from the upper end and 53mm away from the two side ends, are taken as circle centers to be provided with round holes with the diameter of 20mm, and all the round holes are polished smoothly. Fig. 1 is a schematic structural view of a front vertical surface and a back vertical surface of a prestressed shoring structure according to an embodiment of the present invention.
2. Two steel plates 400mm × 1900mm × 20mm thick are used as two side plates, and steel plates 250mm × 400mm × 20mm are used as upper and lower end sealing plates.
3. A plurality of steel plates 4 with the size of 360mm multiplied by 16mm are respectively welded with the front panel and the back panel according to the upper part, the middle part and the lower part, and the welding intervals are as follows: the upper 400mm part is spaced by 125mm from the left to the right and is spaced by 133mm from the upper to the lower; the middle 900mm part is arranged at the left-right intervals of 66mm, 59mm and 66mm, and at the up-down intervals of 67mm and 61mm … …; the lower 600mm part, the left-right distance is 125mm, the upper-lower distance is 100mm, and a middle latticed middle framework between the front panel and the back panel is formed.
4. And welding two 400mm × 1900mm × 20mm side steel plates to two sides of the front and back panels, and welding upper and lower seal plates to the upper and lower parts of the cylinder formed by the front and back panels and the two side panels to form a box structure with longitudinal and transverse supports inside, namely completing the prestressed tensioning and jacking structure part.
5. A20 mm thick steel plate is welded into a 55mm X95mm box structure, and then welded in the middle of two sides of the top bracing structure at a position 751mm away from the lower end of the top bracing structure to serve as a lifting lug 3 of the top bracing structure.
Secondly, processing and manufacturing the movable support structure 5
1. The method is characterized in that square steel with the thickness of 40mm multiplied by 5mm is welded into a square steel frame with the thickness of 370mm multiplied by 520mm multiplied by 1940mm, and one square steel with the thickness of 40mm multiplied by 5mm is welded at a position which is 650mm away from the lower end of the side surface of the steel frame to be used as a cross brace of the steel frame and used for placing a lifting lug of a jacking structure, so that the jacking structure can be placed in the steel frame.
2. A square steel frame with the diameter of 490mm multiplied by 640mm multiplied by 490mm is welded by adopting a square steel with the diameter of 40mm multiplied by 5mm, and 4 universal wheels 8 with the diameter of 100mm are arranged at the lower part of the square steel frame to manufacture the movable chassis.
3. And welding the lower part of the steel frame and the movable chassis together to form the movable steel frame. Fig. 2 is a schematic view of an internal steel plate lattice support structure of a prestressed shoring structure according to an embodiment of the present invention, and fig. 3 is a perspective view of fig. 2.
Movable prestress tension shoring structure assembly
1. And placing the top bracing structure inside the movable steel frame through the lifting lugs, and placing the lifting lugs on the cross braces of the steel frame.
2. The unbalance of the jacking structure can be caused due to the unevenness of the ground, and the balance adjustment of the jacking structure is carried out by placing a steel sheet with the thickness of 2-5mm at the lower part of the lifting lug.
And fourthly, another movable steel frame is taken, a square steel cross brace with the length of 40mm multiplied by 5mm is welded at the position 630mm away from the upper part, and the two jacks 7 are placed on the cross brace on the steel frame and the chassis at the lower part of the steel frame to form the movable jack. Fig. 4 is a schematic structural diagram of a movable jack according to an embodiment of the present invention.
And fifthly, combining the movable jack with the movable steel frame for use, namely the movable prestress tensioning and shoring equipment.
The movable prestress tensioning and jacking combined device provided by the invention has the advantages that before the jack equipment is adopted for supporting, whether the jack is tightly attached to the jacking or not needs to be checked, the jack is debugged firstly, and then tensioning is carried out.
The invention has substantive characteristics and obvious technical progress, and the manufacturing method of the movable prestress tensioning shoring combination device of the invention, the tensioning shoring part, the movable bracket and the steel strand positioning device are designed according to the tensioning force of the design drawing and a pedestal, are not limited to fixed materials, specifications and sizes, are calculated by a designer, and ensure that the structure of the shoring structure and the structure of the positioning device are not deformed. The movable support can be designed or assembled in a detachable mode, and is suitable for tensioning pedestals in different forms. But support universal wheel design or height-adjustable's universal wheel to prevent that the pedestal from appearing uneven and subsiding, also can accurately adjust the shore structure position through the height of adjusting the universal wheel. The support function is not limited to security protection shore, also is the installation jack position.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to fall within the scope of the invention, which is defined in the claims.
Claims (7)
1. A manufacturing method of a movable prestress tensioning and shoring combined device is characterized by comprising the following steps:
a. the method for manufacturing the prestress tensioning top bracing structure comprises the following steps:
(1) manufacturing a rectangular front panel and a rectangular back panel of the steel plate frame box body, wherein the front panel and the back panel have the same structure, and the middle part of the panel of the steel plate frame box body is provided with a plurality of through holes according to design, and the through holes are used for penetrating steel strands;
(2) manufacturing rectangular two-side panels and end sealing plates at the upper end and the lower end of a steel plate frame box body;
(3) manufacturing a framework of a steel plate frame box body, and welding a plurality of steel plates with a front panel and a back panel according to the upper part, the middle part and the lower part of the steel plate frame box body to form a square middle framework between the front panel and the back panel;
(4) forming a prestress tensioning shoring structure, welding two side steel plates on two sides of a front panel and a back panel, welding an upper sealing plate and a lower sealing plate on the upper part and the lower part of a cylinder formed by the front panel, the back panel and the two side plates to form a box body structure internally provided with longitudinal and transverse supports, and forming the prestress tensioning shoring structure;
(5) the middle parts of two sides of the prestress tensioning shoring structure are respectively welded with a cantilever lug;
b. manufacturing a movable support structure, comprising the following steps:
(1) manufacturing a rectangular square steel frame to accommodate the prestress tensioning shoring structure, wherein a cross brace of the square steel frame is arranged at the middle lower part of the rectangular square steel frame and is used for placing a lug of the shoring structure;
(2) providing four universal wheels with the diameter of 100mm, wherein the universal wheels are arranged at four corners below a rectangular square steel frame chassis;
welding square steel of 40mm multiplied by 5mm into a square steel frame of 490mm multiplied by 640mm multiplied by 490mm, and installing 4 universal wheels (8) with the diameter of 100mm at the lower part to manufacture a movable chassis;
(3) welding the lower end of the steel plate frame box body and the rectangular square steel frame chassis together to form a movable support structure;
c. movable prestress tensioning and shoring structure assembly
(1) Placing the top bracing structure in the movable steel frame through the lifting lugs, and placing the lifting lugs on the cross braces of the steel frame;
(2) providing a plurality of steel sheets with the thickness of 2-5mm as backing plates and placing the backing plates at the bottom of the universal wheel so as to balance and adjust the jacking structure according to the requirement;
d. manufacturing a movable jack steel frame, wherein the movable jack steel frame has the same appearance structure and size as the movable steel frame manufactured in the steps a, b and c, the movable jack steel frame comprises four universal wheels arranged at the bottom of the movable jack steel frame, a square steel cross brace is welded at the upper part of the movable jack steel frame according to the design, and two jacks are respectively placed on the upper cross brace of the steel frame and a jack support of a chassis at the lower part of the steel frame to form the movable jack steel frame;
e. combined movable prestress tensioning top bracing device
The movable jack steel frame and the movable prestress tensioning and jacking structure are spliced together for combined use, so that the movable prestress tensioning and jacking device is achieved.
2. The method of claim 1, wherein the through holes are polished smooth.
3. The method for manufacturing a movable prestressed tensioning shoring combined device according to claim 1, wherein the thickness of said front panel is not less than 20 mm.
4. The method for manufacturing a movable prestressed tensioning shoring combined device according to claim 1, wherein the thickness of said side plate is not less than 20 mm.
5. The method for manufacturing a movable prestressed tensioning shoring combined device according to claim 1, wherein the thickness of said end closure plate is not less than 20 mm.
6. The method for manufacturing the movable prestressed tensioning shoring combined device according to claim 1, wherein the diameter of the universal wheel is more than or equal to 100 mm.
7. The method of claim 1, wherein the jack is a hydraulic jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011110289.4A CN112267687A (en) | 2020-10-16 | 2020-10-16 | Manufacturing method of movable prestress tensioning and shoring combined device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011110289.4A CN112267687A (en) | 2020-10-16 | 2020-10-16 | Manufacturing method of movable prestress tensioning and shoring combined device |
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| CN112267687A true CN112267687A (en) | 2021-01-26 |
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| CN202011110289.4A Pending CN112267687A (en) | 2020-10-16 | 2020-10-16 | Manufacturing method of movable prestress tensioning and shoring combined device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10331325A (en) * | 1997-06-03 | 1998-12-15 | Tobishima Corp | Tensile prestress introducing method for steel frame member, steel frame member, and its reinforcing method |
| CN201746779U (en) * | 2010-08-13 | 2011-02-16 | 中国二十二冶集团有限公司 | Prestressed tension jack moving frame |
| CN106223204A (en) * | 2016-08-29 | 2016-12-14 | 沈阳市政集团有限公司 | A kind of prestressing force draws high narrow region aids construction stretching chassis and construction method |
| CN208375570U (en) * | 2018-06-21 | 2019-01-15 | 陕西建工新型建材有限公司 | A kind of removable Pretensioned prestressing stretch-drawing pedestal device |
| CN210001511U (en) * | 2019-05-14 | 2020-01-31 | 中建八局第二建设有限公司 | simple jack hoisting frame |
-
2020
- 2020-10-16 CN CN202011110289.4A patent/CN112267687A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10331325A (en) * | 1997-06-03 | 1998-12-15 | Tobishima Corp | Tensile prestress introducing method for steel frame member, steel frame member, and its reinforcing method |
| CN201746779U (en) * | 2010-08-13 | 2011-02-16 | 中国二十二冶集团有限公司 | Prestressed tension jack moving frame |
| CN106223204A (en) * | 2016-08-29 | 2016-12-14 | 沈阳市政集团有限公司 | A kind of prestressing force draws high narrow region aids construction stretching chassis and construction method |
| CN208375570U (en) * | 2018-06-21 | 2019-01-15 | 陕西建工新型建材有限公司 | A kind of removable Pretensioned prestressing stretch-drawing pedestal device |
| CN210001511U (en) * | 2019-05-14 | 2020-01-31 | 中建八局第二建设有限公司 | simple jack hoisting frame |
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Application publication date: 20210126 |