CN102995564A - Method and device for drawing steel strand in prestressing duct - Google Patents
Method and device for drawing steel strand in prestressing duct Download PDFInfo
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- CN102995564A CN102995564A CN2012105363290A CN201210536329A CN102995564A CN 102995564 A CN102995564 A CN 102995564A CN 2012105363290 A CN2012105363290 A CN 2012105363290A CN 201210536329 A CN201210536329 A CN 201210536329A CN 102995564 A CN102995564 A CN 102995564A
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- pore passage
- prestressed pore
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Abstract
The invention discloses a method and device for drawing a steel strand in a prestressing duct. The method is characterized by comprising the steps of: preparing one section of drawing steel wire, fixing a drawing ball on the end part of the drawing steel wire, driving and blowing the drawing steel wire from one end of the prestressing duct to the other end of the prestressing end by the drawing ball by virtue of compressed air output by a pressure gas storage tank to ensure that the drawing steel wire penetrates through the prestressing duct; and completing the penetrating operation of the steel strand by a winch through the guide of the drawing steel wire. The invention provides a simple and convenient method and device for penetrating the steel strand of the long prestressing duct, is good in penetrating effect, and is capable of greatly increasing the penetrating speed.
Description
Technical field
The present invention relates to a kind of prestress wire threading method and equipment that is applied in the pre-stress construction, especially build the construction environment of continuous beam prestressing force lashing for Large-Span Cantilever, be used for the lashing of the steel strand of realization prestressed pore passage.
Background technology
Shan, China Shanxi Yellow River Bridge length 9.97km, continuous beam and T structure are more, wherein, main bridge is designed to the firm structure of the single T of 15 (2 * 108) m steel purlin combining structure of putting more energy into, should design complexity in advance, 214 holes, simply connected longitudinal prestressing duct, the longest prestressed pore passage length reaches 202m, steel strand prestress 348t, the pre-stress construction workload is very large.
Common method for the lashing of realization prestress wire in the prior art is artificial lashing and hinging device for cable-stayed bridge lashing.Wherein, manually wear in the duct that prestress wire is mainly used in lacking, the prestressing force lashing need drop into a large amount of manpowers and a large amount of time of cost for the slotted hole road.And, can cause because of artificial lashing and smash up metal bellows, cause the duct to stop up; The mode of hinging device for cable-stayed bridge lashing still needs to solve the problem that penetrates of lead-in wire.
Continuous increase along with beam section jib-length, at the main crane gear 5510 type tower cranes that drop into of beam section construction, lifting position and hoisting weight are restricted, this has brought more restriction condition for prestressing force lashing work, and the length of the lashing holding time of prestress wire will directly have influence on the construction period of whole beam section cantilever pouring.
The open report of more ineffective steel strand threading method for the big-length prestressed pore passage up to now.
Summary of the invention
The present invention is for avoiding the existing weak point of above-mentioned prior art, steel strand threading method and equipment in a kind of prestressed pore passage are provided, in the hope of the efficient of Effective Raise steel stranded wire penetrating adapter construction, effectively saving construction cost.
The present invention is that the technical solution problem adopts following technical scheme:
The characteristics of steel strand threading method are in the prestressed pore passage of the present invention: adopt one section traction steel wire, at described traction steel wire end fixed traction ball, utilize the compressed air of pressed gas gasholder output that the end that tow ball drives traction steel wire prestressing force duct is blowed to the other end, so that traction steel wire runs through prestressed pore passage; Hoist engine is finished the lashing operation of steel wire bundle by the guiding of described traction steel wire.
The steel strand threading method carries out as follows in the prestressed pore passage of the present invention:
Step 1, one section traction steel wire of employing, at described traction steel wire end fixed traction ball, tow ball is put into an end of prestressed pore passage, the diameter of described tow ball is can be smoothly by being as the criterion in prestressed pore passage with tow ball, and the length of traction steel wire is to be as the criterion can run through prestressed pore passage; Insert the gas outlet tube of pressed gas gasholder at an end of the prestressed pore passage of putting into tow ball;
Step 3, connect the silk steel cable of rack winch at the front end of the traction steel wire that runs through prestressed pore passage, tail end at described traction steel wire connects back the wire rope that leads hoist engine, utilize and lead the hoist engine traction steel wire of pulling back for described time, the wire rope that drives rack winch by described traction steel wire of pulling back runs through prestressed pore passage;
To connect the design feature of equipment be to arrange to steel strand in the prestressed pore passage of the present invention:
One section traction steel wire is fixedly installed tow ball in the end of described traction steel wire, and the diameter of described tow ball is can be smoothly by being as the criterion in prestressed pore passage with tow ball, and the length of traction steel wire is to be as the criterion can run through prestressed pore passage;
One pressed gas gasholder is used for providing the end that tow ball is driven traction steel wire prestressing force duct to blow to the pressed gas of the other end, and described pressed gas gasholder is to provide source of the gas by air compressor;
Lead hoist engine one time, be used for drawing the traction steel wire that is applied in prestressed pore passage and guide the wire rope of the rack winch that is used for the traction steel wire bundle to run through described prestressed pore passage;
One rack winch is used at an end of described prestressed pore passage the steel wire bundle traction of boring a hole.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the inventive method lashing is effective, has greatly improved lashing speed;
2, the present invention adopts tow ball to draw, and has effectively avoided the damage for bellows;
3, the present invention is cheap, easy and simple to handle, time saving and energy saving, safe and efficient, can be widely used in the lashing of Large-Span Cantilever continuous beam prestress wire;
4, the present invention has improved work efficiency greatly by the utilization in Shan, Shanxi Yellow River Bridge central sill section longitudinal prestressing steel stranded wire penetrating adapter, has compressed the segmental construction cycle, and the long boom segments of 4m can namely be finished at eight days the construction of a sections.
Description of drawings
Fig. 1 is for utilizing present device to implement the inventive method step 1 schematic diagram;
Fig. 2 is for utilizing present device to implement the inventive method step 2 schematic diagram;
Fig. 3 is for utilizing present device to implement the inventive method step 3 schematic diagram;
Fig. 4 is for utilizing present device to implement the inventive method step 4 schematic diagram;
Number in the figure: 1 prestressed pore passage; 2 tow balls; 3 traction steel wires; 3a traction steel wire volume; 4 steel wire bundles; 5 pressed gas gasholder; 6 rack winches; Lead hoist engine 7 times; 8 beam bodies.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, among the present invention in the prestressed pore passage steel strand to connect equipment be to arrange:
One section traction steel wire 3 that is wound on the traction steel wire volume 3a, be fixedly installed tow ball 2 in the end of described traction steel wire, the diameter of described tow ball 2 is can be smoothly by being as the criterion in prestressed pore passage 1 with tow ball 2, and the length of traction steel wire 3 is to be as the criterion can run through prestressed pore passage 1;
One is placed on the pressed gas gasholder 5 on the beam body 8, and being used for provides the pressed gas that an end in tow ball 2 drive traction steel wire prestressing force ducts 1 is blowed to the other end, and described pressed gas gasholder 5 is to provide source of the gas by air compressor;
Lead hoist engine 7 one time, be used for drawing the traction steel wire 3 that is applied in prestressed pore passage 1 and guide the wire rope of the rack winch 6 that is used for the traction steel wire bundle to run through described prestressed pore passage 1;
One rack winch 6 is used at an end of described prestressed pore passage 1 steel wire bundle 4 traction of boring a hole.
In the implementation, utilize the method that steel strand connect in the equipment enforcement prestressed pore passage in the present embodiment to carry out as follows:
Step 1, as shown in Figure 1, adopt one section traction steel wire 3 that is wound on the traction steel wire volume 3a, at described traction steel wire 3 end fixed traction balls 2, tow ball is put into an end of prestressed pore passage, the diameter of described tow ball 2 is can be smoothly by being as the criterion in prestressed pore passage 1 with tow ball 2, and the length of traction steel wire 3 is to be as the criterion can run through prestressed pore passage; Insert the gas outlet tube of pressed gas gasholder 5 at an end of the prestressed pore passage 1 of putting into tow ball 2, the gas outlet tube of pressed gas gasholder 5 is advisable with the diameter that is slightly less than prestressed pore passage 1.
Step 3, as shown in Figure 3, the silk steel cable that connects rack winch 6 at the front end of the traction steel wire 3 that runs through prestressed pore passage 1, tail end at described traction steel wire 3 connects back the wire rope that leads hoist engine 7, utilize and lead hoist engine 7 traction steel wire 3 of pulling back for described time, the wire rope that drives rack winches 6 by the described traction steel wire of pulling back 3 runs through prestressed pore passage 1.
In the implementation, the pressure in the pressed gas gasholder is controlled at 0.5～1MPa; The diameter of tow ball is slightly less than the prestressed pore passage diameter and gets final product, the pressure loss of Xiao Yi build-up of pressure gas too, and tow ball can be baton round or stainless steel hollow ball; The diameter of traction steel wire can be chosen as 2mm, and traction steel wire is fixed with the mode of tow ball employing perforation and is connected; Returning the tonnage that leads 3 tons of hoist engine 7 selections gets final product; Rack winch 6 is chosen as the tonnage of 5 tons or 10 tons according to steel wire bundle length and radical.
Claims (3)
1. steel strand threading method in the prestressed pore passage, it is characterized in that: adopt one section traction steel wire (3), at described traction steel wire (3) end fixed traction ball (2), utilize the compressed air of pressed gas gasholder (5) output that the end that tow ball (2) drives traction steel wire (3) prestressing force duct (1) is blowed to the other end, so that traction steel wire (3) runs through prestressed pore passage (1); Hoist engine is finished the lashing operation of steel wire bundle (4) by the guiding of described traction steel wire (3).
2. steel strand threading method in the prestressed pore passage according to claim 1 is characterized in that carrying out as follows:
Step 1, employing one section traction steel wire (3), at described traction steel wire (3) end fixed traction ball (2), tow ball is put into an end of prestressed pore passage, the diameter of described tow ball (2) is can be smoothly by being as the criterion in prestressed pore passage (1) with tow ball (2), and the length of traction steel wire (3) is to be as the criterion can run through prestressed pore passage; Insert the gas outlet tube of pressed gas gasholder (5) at an end of the prestressed pore passage of putting into tow ball (2) (1);
Step 2, utilize pressed gas gasholder (5) at the compressed air of its gas outlet tube output tow ball (2) to be driven traction steel wire (3) to blow to the other end of described prestressed pore passage (1) from an end of described prestressed pore passage (1), so that traction steel wire (3) runs through prestressed pore passage (1);
Step 3, connect the silk steel cable of rack winch (6) at the front end of the traction steel wire that runs through prestressed pore passage (1) (3), tail end at described traction steel wire (3) connects back the wire rope that leads hoist engine (7), utilize and lead hoist engine (7) traction steel wire (3) of pulling back for described time, the wire rope that is driven rack winch (6) by described traction steel wire of pulling back (3) runs through prestressed pore passage (1);
Step 4, connect steel wire bundle (4) at the described wire rope that runs through the rack winch (6) of prestressed pore passage (1), utilize the wire rope of rack winch (6) to drive steel wire bundle (4) and finish the lashing operation.
3. steel strand connect equipment in the prestressed pore passage, it is characterized in that arranging:
One section traction steel wire (3), be fixedly installed tow ball (2) in the end of described traction steel wire, the diameter of described tow ball (2) is can be smoothly by being as the criterion in prestressed pore passage (1) with tow ball (2), and the length of traction steel wire (3) is to be as the criterion can run through prestressed pore passage (1);
One pressed gas gasholder (5) is used for providing the pressed gas that an end in tow ball (2) drive traction steel wire prestressing force duct (1) is blowed to the other end, and described pressed gas gasholder (5) is to provide source of the gas by air compressor;
Lead hoist engine (7) for one time, be used for drawing the traction steel wire (3) that is applied in prestressed pore passage (1) and guide the wire rope of the rack winch (6) that is used for the traction steel wire bundle to run through described prestressed pore passage (1);
One rack winch (6) is used at an end of described prestressed pore passage (1) steel wire bundle (4) traction of boring a hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105363290A CN102995564A (en) | 2012-12-12 | 2012-12-12 | Method and device for drawing steel strand in prestressing duct |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105363290A CN102995564A (en) | 2012-12-12 | 2012-12-12 | Method and device for drawing steel strand in prestressing duct |
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| CN102995564A true CN102995564A (en) | 2013-03-27 |
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| CN2012105363290A Pending CN102995564A (en) | 2012-12-12 | 2012-12-12 | Method and device for drawing steel strand in prestressing duct |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005340A (en) * | 2014-06-12 | 2014-08-27 | 中铁六局集团天津铁路建设有限公司 | Construction method for threading full-length prestressed steel strands of continuous beam |
| CN110735401A (en) * | 2019-10-29 | 2020-01-31 | 中铁十八局集团第五工程有限公司 | overall pulling method for ultra-long prestressed steel strand |
| CN112252587A (en) * | 2020-10-31 | 2021-01-22 | 福建省泰宏建设工程有限公司 | Post-tensioned prestressed beam and construction method thereof |
| CN116856625A (en) * | 2023-09-05 | 2023-10-10 | 北京市建筑工程研究院有限责任公司 | Anti-twisting traction node device and steel strand penetrating method |
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| DE2717869A1 (en) * | 1977-04-22 | 1978-10-26 | Dyckerhoff & Widmann Ag | PROCESS FOR THE MANUFACTURING OF COMPONENTS FROM PRE-TENSIONED CONCRETE |
| CN2632902Y (en) * | 2003-06-11 | 2004-08-11 | 庞伟 | Concealed piping wire apparatus |
| CN101571007A (en) * | 2009-05-26 | 2009-11-04 | 上海建科结构新技术工程有限公司 | Prestressed reinforcing steel post penetrating method for ultralong prestressed duct |
| CN101599622A (en) * | 2008-12-03 | 2009-12-09 | 中国第二冶金建设有限责任公司 | A kind of method of threading in pipe |
| CN102561706A (en) * | 2012-03-19 | 2012-07-11 | 中冶天工集团有限公司 | Internal threading method for spatial large-span prestressed steel structure steel strand |
| CN102619339A (en) * | 2012-04-18 | 2012-08-01 | 中建六局工业设备安装有限公司 | Construction method for multi-beam steel stranded wires to pass through long and thin narrow space at high altitude |
| CN202925479U (en) * | 2012-12-12 | 2013-05-08 | 中铁上海工程局有限公司 | Apparatus for leading steel strand in pre-stress tunnel |
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2012
- 2012-12-12 CN CN2012105363290A patent/CN102995564A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2717869A1 (en) * | 1977-04-22 | 1978-10-26 | Dyckerhoff & Widmann Ag | PROCESS FOR THE MANUFACTURING OF COMPONENTS FROM PRE-TENSIONED CONCRETE |
| CN2632902Y (en) * | 2003-06-11 | 2004-08-11 | 庞伟 | Concealed piping wire apparatus |
| CN101599622A (en) * | 2008-12-03 | 2009-12-09 | 中国第二冶金建设有限责任公司 | A kind of method of threading in pipe |
| CN101571007A (en) * | 2009-05-26 | 2009-11-04 | 上海建科结构新技术工程有限公司 | Prestressed reinforcing steel post penetrating method for ultralong prestressed duct |
| CN102561706A (en) * | 2012-03-19 | 2012-07-11 | 中冶天工集团有限公司 | Internal threading method for spatial large-span prestressed steel structure steel strand |
| CN102619339A (en) * | 2012-04-18 | 2012-08-01 | 中建六局工业设备安装有限公司 | Construction method for multi-beam steel stranded wires to pass through long and thin narrow space at high altitude |
| CN202925479U (en) * | 2012-12-12 | 2013-05-08 | 中铁上海工程局有限公司 | Apparatus for leading steel strand in pre-stress tunnel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104005340A (en) * | 2014-06-12 | 2014-08-27 | 中铁六局集团天津铁路建设有限公司 | Construction method for threading full-length prestressed steel strands of continuous beam |
| CN110735401A (en) * | 2019-10-29 | 2020-01-31 | 中铁十八局集团第五工程有限公司 | overall pulling method for ultra-long prestressed steel strand |
| CN112252587A (en) * | 2020-10-31 | 2021-01-22 | 福建省泰宏建设工程有限公司 | Post-tensioned prestressed beam and construction method thereof |
| CN112252587B (en) * | 2020-10-31 | 2022-02-15 | 福建省泰宏建设工程有限公司 | Post-tensioned prestressed beam and construction method thereof |
| CN116856625A (en) * | 2023-09-05 | 2023-10-10 | 北京市建筑工程研究院有限责任公司 | Anti-twisting traction node device and steel strand penetrating method |
| CN116856625B (en) * | 2023-09-05 | 2023-11-28 | 北京市建筑工程研究院有限责任公司 | Anti-twisting traction node device and steel strand penetrating method |
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Application publication date: 20130327 |