CN101571007A - Prestressed reinforcing steel post penetrating method for ultralong prestressed duct - Google Patents
Prestressed reinforcing steel post penetrating method for ultralong prestressed duct Download PDFInfo
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- CN101571007A CN101571007A CNA2009100519775A CN200910051977A CN101571007A CN 101571007 A CN101571007 A CN 101571007A CN A2009100519775 A CNA2009100519775 A CN A2009100519775A CN 200910051977 A CN200910051977 A CN 200910051977A CN 101571007 A CN101571007 A CN 101571007A
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- pore passage
- prestressed pore
- prestressed
- draught line
- reinforcing steel
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Abstract
The invention discloses a prestressed reinforcing steel post penetrating method for an ultralong prestressed duct, which relates to the technical field of post-tensioned prestressing construction, and solves the technical problems of reducing the construction cost and construction period. The method comprises the following steps: filling a high pressure liquid into the prestressed duct from an inlet of the prestressed duct, and reducing the frictional resistance of the prestressed duct to a pull wire by utilizing the lubrication action and the buoyancy of the liquid; pulling a light weight pull wire through a floating body with light weight and wear resistance; pulling the light weight pull wire into the prestressed duct by utilizing the impulse force of the liquid to the floating body and the pushing force of the light weight pull wire; then pulling pull wires with high tensile strength in turn by using the pull wire with low tensile strength in the prestressed duct so as to pull a pull wire used for pulling the prestressed reinforcing steel into the prestressed duct; and finally pulling the prestressed reinforcing steel into a required position by using the pull wire pulling the prestressed reinforcing steel. The method provided by the invention has the advantages of low construction cost and short construction period.
Description
Technical field
The present invention relates to the technology of Post-tension Prestress Construction, particularly relate to the technology of a kind of prestressed reinforcing steel post penetrating Shu Fangfa of the super-length prestressed duct that is used for Post-tension Prestress Construction.
Background technology
Post-stressed Concrete Construction Technique is extensively used in the modern architecture construction field.Presstressed reinforcing steel lashing technology is reaching its maturity and improve and constantly obtain innovation and development along with this technology also.
Conventional at present presstressed reinforcing steel lashing method is divided into first lashing method and back lashing method.Wherein, first lashing method all applies in the common prestressed structure usually, and its difficulty of construction is lower; Lashing method then often applies in the prestressed structure system of large span, and its difficulty of construction is bigger, and along with the increase of member span, its difficulty of construction also can increase thereupon.
So-called back lashing method just is meant and prestressed pore passage is completed in advance and uses concreting and then the method for carrying out the presstressed reinforcing steel lashing.Prestressed pore passage in the back lashing method has following characteristic: 1) owing to prestressed pore passage moulding in concrete, so prestressed pore passage is long more, and the frictional resistance of the prestressed pore passage that presstressed reinforcing steel is suffered is just big more; 2) owing to the influence of factors such as prestressed pore passage quality, presstressed reinforcing steel is being obstructed easily in general propelling movement process or is crooked.
Traditional back lashing method is carried out presstressed reinforcing steel lashing when construction, all is to rely on manpower or machinery directly presstressed reinforcing steel to be carried out single wear or whole bundle wears.This traditional job practices is owing to be subjected to due to the characteristic of prestressed pore passage, when the presstressed reinforcing steel lashing is carried out in the super-length prestressed duct that length is surpassed 100 meters, no matter presstressed reinforcing steel is to rely on manpower or machinery to carry out single wear or whole bundle wears, and all can't normally penetrate prestressed pore passage; Therefore often need reserve the draught line with sufficient intensity in length surpasses 100 meters super-length prestressed duct presstressed reinforcing steel is carried out traction, thereby its construction cost is increased greatly, the construction period is also longer; In case and fortuitous event such as fracture takes place and also can't adopt remedial measures and repaired in the draught line of reserving in the prestressed pore passage.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical problem to be solved by this invention provides and a kind ofly need not in prestressed pore passage to reserve draught line and can finish the presstressed reinforcing steel traction simply and easily, and construction cost is low, the construction period short, even if the prestressed reinforcing steel post penetrating Shu Fangfa in the super-length prestressed duct that draught line generation fracture waits fortuitous event also to be easy to adopt remedial measures is repaired.
In order to solve the problems of the technologies described above, the prestressed reinforcing steel post penetrating Shu Fangfa in a kind of super-length prestressed duct provided by the present invention is characterized in that concrete steps are as follows:
1) chooses many different draught lines of tensile strength;
Wherein, all greater than the length of prestressed pore passage, the draught line that tensile strength is minimum is the lightweight draught line to the length of every draught line;
2) take out the minimum lightweight draught line of tensile strength, and bind a light wear-resistant buoyancy aid at the one end;
Wherein, the size of light wear-resistant buoyancy aid is corresponding with the internal diameter of prestressed pore passage, make its can be in prestressed pore passage moving axially along prestressed pore passage;
3) buoyancy aid is put into prestressed pore passage from the prestressed pore passage inlet;
4) in prestressed pore passage, inject highly pressurised liquid from the prestressed pore passage inlet with high-pressure pump, and use mechanical force to push the lightweight draught line to the prestressed pore passage Way out, make buoyancy aid can fly at inject the liquid level of liquid, and traction lightweight draught line moves to the prestressed pore passage outlet under the effect of liquid impulse force and lightweight draught line propelling movement power, pass the prestressed pore passage outlet until buoyancy aid, thereby finish the traction of lightweight draught line;
Wherein, the lightweight draught line after traction is finished leaves the end of a thread of plugging into for other lines at the prestressed pore passage inlet;
5) take out a minimum draught line of tensile strength in the draught line that did not draw, the draught line in the relative prestressed pore passage, this draught line is a high intensity line, the draught line in the prestressed pore passage is the low-intensity line;
6) the end of a thread binding that an end and the low-intensity line of high intensity line are stayed the prestressed pore passage inlet;
7) use mechanical force pulling low-intensity line, its traction high intensity line is moved to the prestressed pore passage outlet, pass the prestressed pore passage outlet until an end of high intensity line, thereby finish the traction of high intensity line;
Wherein, the high intensity line after traction is finished leaves the end of a thread of plugging into for other lines at the prestressed pore passage inlet;
8) repeating step 5 is finished traction to step 7 until the highest draught line of tensile strength;
9) the end of a thread binding that an end and the draught line of presstressed reinforcing steel are stayed the prestressed pore passage inlet;
10) use mechanical force pulling draught line, its traction presstressed reinforcing steel is moved to the prestressed pore passage outlet, be towed to desired area until presstressed reinforcing steel.
Further, buoyancy aid traction lightweight draught line in step 4 is in the process that the prestressed pore passage outlet is moved, inject gases at high pressure in from the prestressed pore passage inlet toward prestressed pore passage in good time, act on the thrust towards the prestressed pore passage Way out of buoyancy aid with increase.
Further, the low-intensity line traction high intensity line in step 7 is injected liquid from the prestressed pore passage inlet in prestressed pore passage in the process that the prestressed pore passage outlet is moved, to reduce the frictional resistance of prestressed pore passage to each draught line.
Further, the liquid that injects in the prestressed pore passage is water.
Further, described draught line is nylon wire, linen thread, plastic cord or steel wire, or the assembly of steel wire and lightweight tubing.
Further, an end end of described presstressed reinforcing steel binding draught line the end of a thread is hemispherical or taper shape.
Further, an end end of described presstressed reinforcing steel binding draught line the end of a thread is arranged with the bullet type sheath.
Further, described presstressed reinforcing steel is by metal pull bar or draw in the net to bind draught line the end of a thread by wire rope braiding.
Further, described presstressed reinforcing steel is a steel wire bundle, and earlier through the carding combing, described carding is positioned over the prestressed pore passage inlet to presstressed reinforcing steel before prestressed pore passage is gone in traction, and being provided with the perforate of corresponding steel strand quantity, described carding is carded to parallel beam with steel wire bundle.
Further, described light wear-resistant buoyancy aid is pop can or plastic bottle.
The prestressed reinforcing steel post penetrating Shu Fangfa in super-length prestressed duct provided by the invention, in prestressed pore passage, inject highly pressurised liquid from the prestressed pore passage inlet earlier, utilize the lubrication and the buoyancy thereof of liquid to reduce the frictional resistance of prestressed pore passage to draught line, and by lightweight draught line of light wear-resistant buoyancy aid traction, utilize liquid that the impulse force of buoyancy aid and the propelling movement power of lightweight draught line are drawn the lightweight draught line into prestressed pore passage, utilize the low draught line of tensile strength in the prestressed pore passage to draw the high draught line of tensile strength successively then, thereby the draught line that will be used to draw presstressed reinforcing steel draws into prestressed pore passage, and the last draught line of traction presstressed reinforcing steel that utilizes again draws presstressed reinforcing steel to desired area; This method need not in prestressed pore passage to reserve draught line can finish the presstressed reinforcing steel traction simply and easily, and each draught line can also reuse, and therefore has the beneficial effect that construction cost is low, the construction period is short; In addition, wait fortuitous event also to be easy to adopt remedial measures repaired even if fracture takes place draught line.
Description of drawings
Fig. 1 is the schematic diagram that the prestressed reinforcing steel post penetrating Shu Fangfa in the super-length prestressed duct of the embodiment of the invention draws first draught line;
Fig. 2 is the schematic diagram that the prestressed reinforcing steel post penetrating Shu Fangfa in the super-length prestressed duct of the embodiment of the invention draws second draught line;
Fig. 3 is the schematic diagram that the prestressed reinforcing steel post penetrating Shu Fangfa in the super-length prestressed duct of the embodiment of the invention draws the 3rd draught line;
Fig. 4 is the schematic diagram that the prestressed reinforcing steel post penetrating Shu Fangfa in the super-length prestressed duct of the embodiment of the invention draws presstressed reinforcing steel.
The specific embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
As Fig. 1-shown in Figure 4, the prestressed reinforcing steel post penetrating Shu Fangfa in a kind of super-length prestressed duct that the embodiment of the invention provided is characterized in that, concrete steps are as follows:
1) choose many different draught lines of tensile strength, present embodiment is three, is respectively draught line 21,22,23;
Wherein, all greater than the length of prestressed pore passage 1, the draught line 21 that tensile strength is minimum is the lightweight draught line to the length of every draught line;
2) as shown in Figure 1, take out the minimum lightweight draught line 21 of tensile strength, and bind a light wear-resistant buoyancy aid 3 at the one end;
Wherein, the size of light wear-resistant buoyancy aid 3 is corresponding with the internal diameter of prestressed pore passage 1, make its can be in prestressed pore passage 1 moving axially along prestressed pore passage 1;
3) buoyancy aid 3 is put into prestressed pore passage 1 from prestressed pore passage inlet 11;
4) in prestressed pore passage inlet 11 past prestressed pore passages 1, inject highly pressurised liquid with high-pressure pump 4, and use mechanical force to export 12 directions propelling movement lightweight draught line 21 to prestressed pore passage, make buoyancy aid 3 can fly at inject the liquid level of liquid, and traction lightweight draught line 21 moves to prestressed pore passage outlet 12 under the effect of liquid impulse force and lightweight draught line 21 propelling movement power, pass prestressed pore passage outlet 12 until buoyancy aid 3, thereby finish the traction of lightweight draught line 21;
Wherein, the lightweight draught line 21 after traction is finished leaves the end of a thread of plugging into for other lines at prestressed pore passage inlet 11;
Wherein, buoyancy aid 3 traction lightweight draught lines 21 inject gases at high pressure in from prestressed pore passage inlet 11 toward prestressed pore passages 1 in good time in prestressed pore passage outlet 12 processes that move, and export the thrust of 12 directions with what increase acted on buoyancy aid 3 towards prestressed pore passage;
5) as shown in Figure 2, take out a minimum draught line 22 of tensile strength in the draught line that did not draw, the draught line 21 in the relative prestressed pore passage 1, this draught line 22 is a high intensity line, the draught line 21 in the prestressed pore passage 1 is the low-intensity line;
6) the end of a thread binding that an end and the draught line 21 of draught line 22 are stayed prestressed pore passage inlet 11;
7) use mechanical force pulling draught line 21, its traction draught line 22 is moved to prestressed pore passage outlet 12, pass prestressed pore passage outlet 12 until an end of draught line 22, thereby finish the traction of draught line 22;
Wherein, the draught line 22 after traction is finished leaves the end of a thread of plugging into for other lines at prestressed pore passage inlet 11;
Wherein, draught line 21 traction draught lines 22 are in prestressed pore passage outlet 12 processes that move, and the 1 interior liquid that injects from prestressed pore passage inlet 11 toward prestressed pore passage is to reduce the frictional resistance of 1 pair of each draught line of prestressed pore passage;
8) as shown in Figure 3, take out the draught line 23 that did not draw, the draught line 22 in the relative prestressed pore passage 1, this draught line 23 is a high intensity line, the draught line 22 in the prestressed pore passage 1 is the low-intensity line;
9) the end of a thread binding that an end and the draught line 22 of draught line 23 are stayed prestressed pore passage inlet 11;
10) use mechanical force pulling draught line 22, its traction draught line 23 is moved to prestressed pore passage outlet 12, pass prestressed pore passage outlet 12 until an end of draught line 23, thereby finish the traction of draught line 23;
Wherein, the draught line 23 after traction is finished leaves the end of a thread of plugging into for other lines at prestressed pore passage inlet 11;
11) the end of a thread binding that an end and the draught line 23 of presstressed reinforcing steel 24 are stayed prestressed pore passage inlet 11 as shown in Figure 4;
12) use mechanical force pulling draught line 23, its traction presstressed reinforcing steel 24 is moved to prestressed pore passage outlet 12, be towed to desired area until presstressed reinforcing steel 24.
In the embodiment of the invention, the liquid that injects in the prestressed pore passage is water.
In the embodiment of the invention, described draught line is nylon wire, linen thread, plastic cord or steel wire, or the assembly of steel wire and lightweight tubing (outer peripheral face is wound with the pvc pipe of high strength steel wire).
In the embodiment of the invention, an end end of described presstressed reinforcing steel binding draught line the end of a thread is hemispherical or taper shape, also can be at the sheathed bullet type sheath in an end end of described presstressed reinforcing steel binding draught line the end of a thread, to make things convenient for the traction of presstressed reinforcing steel.
In the embodiment of the invention, described presstressed reinforcing steel is by metal pull bar or draw in the net to bind draught line the end of a thread by wire rope braiding.
In the embodiment of the invention, described presstressed reinforcing steel is a steel wire bundle, and earlier through the carding combing, described carding is positioned over the prestressed pore passage inlet to presstressed reinforcing steel before prestressed pore passage is gone in traction, and being provided with the perforate of corresponding steel strand quantity, described carding is carded to parallel beam with steel wire bundle.
In the embodiment of the invention, described light wear-resistant buoyancy aid is pop can or plastic bottle.
Super-length prestressed duct of the present invention is meant that length surpasses 100 meters prestressed pore passage.
Claims (10)
1, a kind of prestressed reinforcing steel post penetrating Shu Fangfa of super-length prestressed duct is characterized in that concrete steps are as follows:
1) chooses many different draught lines of tensile strength;
Wherein, all greater than the length of prestressed pore passage, the draught line that tensile strength is minimum is the lightweight draught line to the length of every draught line;
2) take out the minimum lightweight draught line of tensile strength, and bind a light wear-resistant buoyancy aid at the one end;
Wherein, the size of light wear-resistant buoyancy aid is corresponding with the internal diameter of prestressed pore passage, make its can be in prestressed pore passage moving axially along prestressed pore passage;
3) buoyancy aid is put into prestressed pore passage from the prestressed pore passage inlet;
4) in prestressed pore passage, inject highly pressurised liquid from the prestressed pore passage inlet with high-pressure pump, and use mechanical force to push the lightweight draught line to the prestressed pore passage Way out, make buoyancy aid can fly at inject the liquid level of liquid, and traction lightweight draught line moves to the prestressed pore passage outlet under the effect of liquid impulse force and lightweight draught line propelling movement power, pass the prestressed pore passage outlet until buoyancy aid, thereby finish the traction of lightweight draught line;
Wherein, the lightweight draught line after traction is finished leaves the end of a thread of plugging into for other lines at the prestressed pore passage inlet;
5) take out a minimum draught line of tensile strength in the draught line that did not draw, the draught line in the relative prestressed pore passage, this draught line is a high intensity line, the draught line in the prestressed pore passage is the low-intensity line;
6) the end of a thread binding that an end and the low-intensity line of high intensity line are stayed the prestressed pore passage inlet;
7) use mechanical force pulling low-intensity line, its traction high intensity line is moved to the prestressed pore passage outlet, pass the prestressed pore passage outlet until an end of high intensity line, thereby finish the traction of high intensity line;
Wherein, the high intensity line after traction is finished leaves the end of a thread of plugging into for other lines at the prestressed pore passage inlet;
8) repeating step 5 is finished traction to step 7 until the highest draught line of tensile strength;
9) the end of a thread binding that an end and the draught line of presstressed reinforcing steel are stayed the prestressed pore passage inlet;
10) use mechanical force pulling draught line, its traction presstressed reinforcing steel is moved to the prestressed pore passage outlet, be towed to desired area until presstressed reinforcing steel.
2, method according to claim 1, it is characterized in that: the buoyancy aid traction lightweight draught line in step 4 is in the process that the prestressed pore passage outlet is moved, inject gases at high pressure in from the prestressed pore passage inlet toward prestressed pore passage in good time, act on the thrust towards the prestressed pore passage Way out of buoyancy aid with increase.
3, method according to claim 1, it is characterized in that: the low-intensity line traction high intensity line in step 7 is in the process that the prestressed pore passage outlet is moved, in prestressed pore passage, inject liquid from the prestressed pore passage inlet, to reduce the frictional resistance of prestressed pore passage to each draught line.
4, according to claim 1 or 3 described methods, it is characterized in that: the liquid that injects in the prestressed pore passage is water.
5, method according to claim 1 is characterized in that: described draught line is nylon wire, linen thread, plastic cord or steel wire, or the assembly of steel wire and lightweight tubing.
6, method according to claim 1 is characterized in that: an end end of described presstressed reinforcing steel binding draught line the end of a thread is hemispherical or taper shape.
7, method according to claim 1 is characterized in that: an end end of described presstressed reinforcing steel binding draught line the end of a thread is arranged with the bullet type sheath.
8, method according to claim 1 is characterized in that: described presstressed reinforcing steel is by metal pull bar or draw in the net to bind draught line the end of a thread by wire rope braiding.
9, method according to claim 1, it is characterized in that: described presstressed reinforcing steel is a steel wire bundle, presstressed reinforcing steel is first through the carding combing before prestressed pore passage is gone in traction, described carding is positioned over the prestressed pore passage inlet, and being provided with the perforate of corresponding steel strand quantity, described carding is carded to parallel beam with steel wire bundle.
10, method according to claim 1 is characterized in that: described light wear-resistant buoyancy aid is pop can or plastic bottle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100519775A CN101571007B (en) | 2009-05-26 | 2009-05-26 | Prestressed reinforcing steel post penetrating method for ultralong prestressed duct |
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| CN2009100519775A CN101571007B (en) | 2009-05-26 | 2009-05-26 | Prestressed reinforcing steel post penetrating method for ultralong prestressed duct |
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| CN101571007B CN101571007B (en) | 2011-04-13 |
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Cited By (8)
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| CN102561706A (en) * | 2012-03-19 | 2012-07-11 | 中冶天工集团有限公司 | Internal threading method of space large-span prestressed steel structure steel strand |
| CN102561204A (en) * | 2012-03-08 | 2012-07-11 | 中铁二十一局集团有限公司 | Construction method for inserting super-long steel stranded wires before pouring of bridge body |
| CN102691268A (en) * | 2012-06-12 | 2012-09-26 | 宁波二十冶建设有限公司 | Stretching construction process of super-long prestressed tendon |
| CN102995564A (en) * | 2012-12-12 | 2013-03-27 | 中铁上海工程局有限公司 | Method and device for drawing steel strand in prestressing duct |
| CN103726664A (en) * | 2013-12-25 | 2014-04-16 | 中铁十三局集团有限公司 | Post-tensioning prestress hole cleaning and reeving device and method |
| CN106758836A (en) * | 2016-12-23 | 2017-05-31 | 中铁十四局集团第二工程有限公司 | A kind of post stressed concrete is big apart from reeving steel strands method |
| CN111236072A (en) * | 2020-01-13 | 2020-06-05 | 中铁北京工程局集团(天津)工程有限公司 | Continuous beam ultra-long bundle steel strand pulling construction method |
| CN115849228A (en) * | 2023-02-22 | 2023-03-28 | 天津华源天伦绳业有限公司 | High-reliability steel wire rope and steel strand traction device and method |
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| US3869530A (en) * | 1974-02-19 | 1975-03-04 | Chester I Williams | Method of constructing a prestressed concrete circular wall |
| DE2717869B2 (en) * | 1977-04-22 | 1979-05-31 | Dyckerhoff & Widmann Ag, 8000 Muenchen | Method for stiffening a thin-walled duct and for threading a tendon into the duct |
| DE2819176A1 (en) * | 1978-05-02 | 1979-11-08 | Focke Karl August | Reinforcement of glass fibre for concrete castings - is fibre strand embedded in synthetic resin-filled, flexible hose |
| CN1978802A (en) * | 2005-12-06 | 2007-06-13 | 杨中源 | Super-length prestressed ground beam construction method |
| CN101122175A (en) * | 2007-08-31 | 2008-02-13 | 中铁二局股份有限公司 | Pretensioned prestressing box girder strain and relaxation process |
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| CN102561204A (en) * | 2012-03-08 | 2012-07-11 | 中铁二十一局集团有限公司 | Construction method for inserting super-long steel stranded wires before pouring of bridge body |
| CN102561204B (en) * | 2012-03-08 | 2014-02-12 | 中铁二十一局集团有限公司 | Construction method for inserting super-long steel stranded wires before pouring of bridge body |
| CN102561706A (en) * | 2012-03-19 | 2012-07-11 | 中冶天工集团有限公司 | Internal threading method of space large-span prestressed steel structure steel strand |
| CN102561706B (en) * | 2012-03-19 | 2016-07-06 | 中冶天工集团有限公司 | Threading method in large-span space prestressed steel structure steel strand wires body |
| CN102691268A (en) * | 2012-06-12 | 2012-09-26 | 宁波二十冶建设有限公司 | Stretching construction process of super-long prestressed tendon |
| CN102995564A (en) * | 2012-12-12 | 2013-03-27 | 中铁上海工程局有限公司 | Method and device for drawing steel strand in prestressing duct |
| CN103726664A (en) * | 2013-12-25 | 2014-04-16 | 中铁十三局集团有限公司 | Post-tensioning prestress hole cleaning and reeving device and method |
| CN106758836A (en) * | 2016-12-23 | 2017-05-31 | 中铁十四局集团第二工程有限公司 | A kind of post stressed concrete is big apart from reeving steel strands method |
| CN111236072A (en) * | 2020-01-13 | 2020-06-05 | 中铁北京工程局集团(天津)工程有限公司 | Continuous beam ultra-long bundle steel strand pulling construction method |
| WO2021143647A1 (en) * | 2020-01-13 | 2021-07-22 | 中铁北京工程局集团(天津)工程有限公司 | Ultra-long steel strand threading construction method for continuous beam |
| CN115849228A (en) * | 2023-02-22 | 2023-03-28 | 天津华源天伦绳业有限公司 | High-reliability steel wire rope and steel strand traction device and method |
| CN115849228B (en) * | 2023-02-22 | 2023-05-02 | 天津华源天伦绳业有限公司 | High-reliability steel wire rope and steel strand traction device and method |
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| CN101571007B (en) | 2011-04-13 |
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