CN102251684A - Construction method for circumferential pretensioning steel strand reinforcement circular structure or construction member - Google Patents

Construction method for circumferential pretensioning steel strand reinforcement circular structure or construction member Download PDF

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Publication number
CN102251684A
CN102251684A CN 201110143277 CN201110143277A CN102251684A CN 102251684 A CN102251684 A CN 102251684A CN 201110143277 CN201110143277 CN 201110143277 CN 201110143277 A CN201110143277 A CN 201110143277A CN 102251684 A CN102251684 A CN 102251684A
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CN
China
Prior art keywords
steel strand
construction
circular
circumferential
anchor head
Prior art date
Application number
CN 201110143277
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Chinese (zh)
Inventor
周长东
厉春龙
李季
白晓彬
田腾
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北京交通大学
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Application filed by 北京交通大学 filed Critical 北京交通大学
Priority to CN 201110143277 priority Critical patent/CN102251684A/en
Publication of CN102251684A publication Critical patent/CN102251684A/en

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Abstract

The invention discloses a construction method for a circumferential pretensioning steel strand reinforcement circular structure or a circumferential pretensioning steel strand reinforcement circular construction member. The construction method can be used for reinforcing circular structures such as a cylindrical silo and the like or large-diameter circular concrete construction members such as stressed circular piers and the like. The method comprises the following steps of: a, connecting one end of a steel strand and an anchor head and fixing; b, enclosing and sleeving the steel strand on the outer surface of a circular structure or construction member to be reinforced, tensioning the other end of the steel strand and locking on the anchor head; c, cutting residual steel strands, and performing rust and corrosion prevention on an anchorage device; and d, repeating the steps and tensioning and fixing the other N-1 steel strands at the other positions of the surface of the same circular structure or construction member to be reinforced, wherein N is 1 to 20. By the method, the reinforcement of the circular structure is convention to realize and practicality is high, and specifically for a large-section circular structure or construction member, circumferential prestressing force is applied to the steel strand, and the reinforced structure can obtain effective circumferential constraint force, and has an obvious effect on inhibiting the development of the inclined cracks and longitudinal cracks.

Description

The job practices of steel strand reinforced circular configuration of the pre-stretch-draw of hoop or member
Technical field
The present invention relates to strengthen or reinforce the method for circular configuration or member by a kind of high-strength metal material, be particularly related to and a kind ofly reinforce circular configurations such as silo, TV transmission tower, water tower, cooling tower, chimney, gasholder and fluid reservoir by ring orientation prestress steel strand self-locking anchor device, or the job practices during the circular concrete component in heavies in section such as pressurized circular pier, cylinder.
Background technology
The category of circular configuration or member comprises such as silo, TV transmission tower, water tower, cooling tower, chimney, gasholder, fluid reservoir and pressurized circular pier, cylinder with large diameter etc.Have thin wall circular shape cross section such as silo etc. under the internal pressure effect, comprising on any radial section of annulus axis, outer wall all is subjected to big pulling force; Filled circles section structural members such as circular pier are under the axial compression effect, and there is the big trend that evenly rises in the cross section.Therefore concrete loose, slump may appear in the outer wall of circular configuration or member, reinforcing bar exposes, even the seepage phenomenon appears in the circular configuration that makes some have reserve function, and this has caused great potential safety hazard to circular configuration.Especially for cross section very big circular configuration or member,, remarkable to the development function effect that suppresses diagonal crack and longitudinal crack if structural outer surface can apply effective hoop restraint forces.
In engineering, enlarged cross section reinforcing method, encased steel reinforcing method, setting support method etc. are arranged for circular configuration such as silo or member reinforcement means commonly used.
The enlarged cross section reinforcing method is drawn materials conveniently, construction technology is simple, consolidation effect is reliable and stable, when improving former bearing of component, can also strengthen its rigidity of section, changes its natural frequency, strengthens stability of structure and anti-seismic performance.But, the operation of enlarged cross section reinforcing method situ wet is many, long construction period, bigger to the original structure influence, as influencing the existing building effect, reduce usage space because of the cross section increases, increase dead load, sometimes even can cause because of the increase of the weight of structure and must add reinforcing, thereby increase reinforcement cost greatly, prolong the engineering time the basis of original structure.When adopting this job practices, often cause the use of original structure to interrupt, bring corresponding indirect loss.
The encased steel reinforcing method can improve its bearing capacity morely under the situation that does not increase scantling basically, increase ductility and rigidity.Be specially adapted to large scale structure and large-span structure, and do not allow to increase former member section size on using, but require to improve significantly the cross section supporting capacity, the reinforcing that increases the structure of ductility and rigidity.This method advantage is an easy construction, and the site work amount is less, and is stressed comparatively reliable; Shortcoming is that steel using amount is bigger, and the reinforcing maintenance cost is higher, should not be used under the environment with corrosive medium.
The advantage of setting support method is simple and reliable, and construction technology is simple, is applicable to beam, plate, analyses frame, the reinforcing of horizontal structure such as rack, shortcoming is ordinary production and the life that influences original structure, architectural composition influence to original structure is bigger, and usage space reduces, and function of use is subjected to certain limitation.
In summary, traditional reinforcement means often has long, multiple deficiency such as cost is higher, big or applicable surface is limited to the influence of the architectural composition of original structure of construction period.
Summary of the invention
Technical problem to be solved by this invention is long a, deficiency such as cost is higher, big or applicable surface is limited to the architectural composition influence of original structure of construction period of often having of traditional reinforcement means, the job practices of steel strand reinforced circular configuration of the pre-stretch-draw of a kind of hoop or member is provided, the present invention both can be used for circular configuration, also can be used for the large-diameter circular section structural member.
The present invention solves the technical scheme that its technical problem adopts:
The job practices of steel strand reinforced circular configuration of the pre-stretch-draw of hoop or member may further comprise the steps:
A. the end with steel strand is connected with anchor head, and is fixed;
B. enclose the cover steel strand in the external surface of waiting to reinforce circular configuration or member, the other end of stretch-draw steel strand also lock onto anchor head;
C. block unnecessary steel strand, do antirust and preservative treatment ground tackle;
D. repeat the fixing other N-1 root steel strand of above-mentioned steps stretch-draw in same other positions of waiting to reinforce circular configuration or component surface; N is 1~20.
Described anchor head plays effect fixing and the locking steel strand, connects as one by intermediate plate and steel strand, vertically contains two parallel ducts in the anchor head.
Compared with prior art, advantage of the present invention is:
1) the present invention adopts supporting a kind of ring orientation prestress steel strand self-locking anchor device, mainly is made up of anchor head, steel strand, intermediate plate.Anchor head plays effect fixing and the locking steel strand, connect as one by intermediate plate and steel strand, vertically contain two parallel ducts in the anchor head, each cross section of anchor head is rectangle, this ground tackle simple structure, can use the convenient prestressing force that applies of vertically-displacable jack, and the grip ideal can be carried out reinforcement and strengthening to existing structure quickly and easily.
2) the invention provides a kind of reinforced construction method that can effectively apply effective hoop restraint forces, and adopt steel strand as the material that structural outer surface is applied effective hoop restraint forces to original structure at circular configuration or large-diameter circular section structural member.Intensity height, elastic limit height, good extending performance, stress relaxation are low, characteristics, especially tensile strength such as not loose are high and relaxation property is good after cutting off because steel strand have, and steel strand are become apply prestressed ideal material in the reinforcement and strengthening.Loss of prestress is little, and consolidation effect is good.
3) the present invention both can be used for the emergent reinforcing fast of circular configuration or large-diameter circular section structural member, as shook the back and reinforce fast; Also can be used for permanent reinforcing, as the maintenance and renovation engineering.Workable in actual engineering, prestressed controlled, the easy row of process that applies, good corrosion resistance, construction technology is simple and efficient, do not need heavy construction equipment, when being used for reinforcing original structure is not almost influenced, when guaranteeing the strength of materials than high usage, have enough safety stocks, very high practical value is arranged.
Description of drawings
Fig. 1 reinforces the schematic diagram of circular configuration or member for job practices of the present invention instructs the prestress steel strand reinforced system of hoop self-locking, wherein reinforces circular configuration or component surface stretch-draw and has fixed 4 ring orientation prestress steel strand waiting;
Fig. 2 is the schematic perspective view of anchor head;
Fig. 3 is the sectional drawing of anchor head;
Fig. 4 is for waiting that the external surface of reinforcing circular configuration or member encloses the process of overlapping ground tackle;
Fig. 5 is for using the reinforcing schematic diagram of a cover hoop prestress wire self-locking anchor device;
Fig. 6 is for using the reinforcing schematic diagram of three cover hoop prestress wire self-locking anchor devices;
Fig. 7 is for using the reinforcing schematic diagram of 20 cover hoop prestress wire self-locking anchor devices;
Among the figure: anchor head 1, strenthening member 7 is treated in 5, the second ducts 6, steel strand 2, the first intermediate plate 3, the second intermediate plates, 4, the first ducts.
The specific embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The matching used a kind of ring orientation prestress steel strand self-locking anchor device of the present invention, as shown in Figure 1, 2, 3, this self-locking anchor device comprises, anchor head 1, steel strand 2, first intermediate plate 3, second intermediate plate 4.
Described anchor head 1 is as Fig. 2, shown in Figure 3, longitudinally is provided with first duct 5 in the anchor head and 6, the first ducts, second duct are parallel with second duct; The left port in first duct is a bellmouth, and the right output port in second duct is a bellmouth.
One end right-to-left of described steel strand 2 passes the bellmouth of first duct 5 and left port thereof, with first intermediate plate, 3 jam-packs; The other end of steel strand 2 passes the bellmouth of second duct 6 and right output port thereof from left to right, with second intermediate plate, 4 jam-packs.
Described first intermediate plate 3, second intermediate plate, 4 structures are identical, are the patent No.: 200620100296.5 " pre-stress anchor clipper ".
Anchor head 1 is selected steel or alloy material for use.
Anchor head plays effect fixing and the locking steel strand, connects as one by intermediate plate and steel strand.
Embodiment one:
The job practices of steel strand reinforced circular configuration of the pre-stretch-draw of hoop or member, this method comprises the steps:
A. the end with steel strand 2 is connected with anchor head 1, and is fixed;
One end right-to-left level of steel strand 2 is passed the bellmouth of first duct 5 and left port thereof, with first intermediate plate, 3 jam-packs, with fixing anchor head 1 and steel strand 2 one ends.
B. enclose the cover steel strand in the external surface of waiting to reinforce circular configuration or member, the other end of stretch-draw steel strand also lock onto anchor head;
Detailed process is as follows: at first, steel strand 2 levels that an end has been connected with anchor head are enclosed and are enclosed within the external surface for the treatment of ruggedized construction or member 7, as shown in Figure 4.
Then, with steel strand 2 other ends from left to right level pass second duct, 6 right output port bellmouths, and pass; Fill in second intermediate plate 4 between the bellmouth of the right part, second duct in steel strand and anchor head, use vertically-displacable jack pair steel strand to implement stretch-draw, the other end of steel strand lock onto anchor head, as shown in Figure 5.
C, block unnecessary steel strand, do antirust and preservative treatment ground tackle:
Measure from ground tackle stretch-draw end outward flange and to stay the 50mm steel strand, remaining part is clipped.
Adopt coating that steel strand and ground tackle are carried out antirust and preservative treatment.Before coating, want earlier it to be handled, remove all rusty stains and greasy dirt, expose metallic luster.Coating generally has the branch of priming paint and finish paint, prime earlier, after be coated with finish paint.Priming paint adopts the epoxy zinc-rich lacquer, is coated with 25 μ m * 2 roads; Finish paint adopts mixed paint, is coated with 50 μ m * 2 roads.
So far, the steel strand reinforced construction of the pre-stretch-draw of hoop is finished.
D. repeat above-mentioned steps a, b, c stretch-draw and fixing other two ring orientation prestress steel strand in same other positions for the treatment of ruggedized construction or component surface, use three cover hoop prestress wire self-locking anchor devices, as shown in Figure 6.
Embodiment two:
Present embodiment is identical with first three step of the job practices of embodiment one, uses a cover hoop prestress wire self-locking anchor device, as shown in Figure 5.
Embodiment three:
Present embodiment is identical with first three step of the job practices of embodiment one, difference only was for the 4th step, repeat stretch-draw and fixing other 19 ring orientation prestress steel strand in same other positions for the treatment of ruggedized construction or component surface, use 20 cover hoop prestress wire self-locking anchor devices, as shown in Figure 7.
More than the job practices of steel strand reinforced circular configuration of the pre-stretch-draw of hoop provided by the present invention or member is described in detail, used specific embodiment herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, part in specific embodiments and applications all can change.In sum, this description should not be construed as limitation of the present invention.

Claims (1)

1. the job practices of steel strand reinforced circular configuration of ring orientation prestress or member is characterized in that, this method comprises the steps:
A. the end with steel strand is connected with anchor head, and is fixed;
B. enclose the cover steel strand in the external surface of waiting to reinforce circular configuration or member, the other end of stretch-draw steel strand also lock onto anchor head;
C. block unnecessary steel strand, do antirust and preservative treatment ground tackle;
D. repeat the fixing other N-1 root steel strand of above-mentioned steps stretch-draw in same other positions of waiting to reinforce circular configuration or component surface; N is 1~20.
CN 201110143277 2011-05-30 2011-05-30 Construction method for circumferential pretensioning steel strand reinforcement circular structure or construction member CN102251684A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103114753A (en) * 2013-03-01 2013-05-22 杨晨 Prestressed cylindrical silo with concealed anchoring end and processing method of stretch opening thereof
CN103132708A (en) * 2013-03-01 2013-06-05 东南大学 Beam-column joint reinforcing method and beam-column joint reinforcing device
CN103147589A (en) * 2013-02-26 2013-06-12 北京交通大学 Construction method for reinforcing circular structure with large diameter by symmetric double-anchor-head pretension steel stranded wires
CN103243863A (en) * 2013-05-22 2013-08-14 北京市建筑工程研究院有限责任公司 Tension anchoring system of pre-stressed wire reinforcing column and construction method
CN104675139A (en) * 2015-02-25 2015-06-03 中交第四公路工程局有限公司 Multipoint fastening and reinforcing method for concrete silo structure
CN106930587A (en) * 2017-03-03 2017-07-07 苏州中材建设有限公司 Novel pre-stressed cement produced with the dry method silo and reinforcement means
CN107907256A (en) * 2017-11-08 2018-04-13 山东华建仓储装备科技有限公司 A kind of method that large warehoused equipment is made of prestress wire
CN108571002A (en) * 2018-04-13 2018-09-25 中交第三航务工程局有限公司 A kind of ring orientation prestress concrete boxed cofferdam and making and installation method for cushion cap foundation construction
CN109056558A (en) * 2018-08-20 2018-12-21 中铁大桥(南京)桥隧诊治有限公司 A kind of circumferential ruggedized construction and its laying method preventing pier top splitting
CN109989360A (en) * 2019-03-26 2019-07-09 中铁七局集团有限公司 A kind of Railway Bridges And Piers Vertical Cracks bracing means and its reinforcement means
CN110863671A (en) * 2019-12-12 2020-03-06 山东奥能电力科技有限公司 Repairing, reinforcing and reinforcing method for cement transmission tower and reinforcing component thereof

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CN2493696Y (en) * 2001-07-31 2002-05-29 柳州市建筑机械总厂 Circular anchorage device
CN1380171A (en) * 2001-04-13 2002-11-20 衡水泰昌预应力有限公司 Large-aperture prestressed concrete pipe and its preparation process
KR20030059048A (en) * 2003-06-20 2003-07-07 김경목 The prestressing anchor by steel circular tube protecting the fiber tendon
CN101798874A (en) * 2010-03-08 2010-08-11 东南大学 Pre-stress construction method of parallel steel stranded wire assembled cable in annular sealed steel pipe
CN101812924A (en) * 2010-04-16 2010-08-25 北京工业大学 Tensioned anchorage system for prestress steel strand reinforced concrete pillar
CN101942906A (en) * 2010-09-21 2011-01-12 同济大学 Buckling-restraining and strengthening system for circular steel tubes
CN202081581U (en) * 2011-05-30 2011-12-21 北京交通大学 Circumferential prestressed steel strand self-locking anchor device

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CN1380171A (en) * 2001-04-13 2002-11-20 衡水泰昌预应力有限公司 Large-aperture prestressed concrete pipe and its preparation process
CN2493696Y (en) * 2001-07-31 2002-05-29 柳州市建筑机械总厂 Circular anchorage device
KR20030059048A (en) * 2003-06-20 2003-07-07 김경목 The prestressing anchor by steel circular tube protecting the fiber tendon
CN101798874A (en) * 2010-03-08 2010-08-11 东南大学 Pre-stress construction method of parallel steel stranded wire assembled cable in annular sealed steel pipe
CN101812924A (en) * 2010-04-16 2010-08-25 北京工业大学 Tensioned anchorage system for prestress steel strand reinforced concrete pillar
CN101942906A (en) * 2010-09-21 2011-01-12 同济大学 Buckling-restraining and strengthening system for circular steel tubes
CN202081581U (en) * 2011-05-30 2011-12-21 北京交通大学 Circumferential prestressed steel strand self-locking anchor device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103147589B (en) * 2013-02-26 2015-05-27 北京交通大学 Construction method for reinforcing circular structure with large diameter by symmetric double-anchor-head pretension steel stranded wires
CN103147589A (en) * 2013-02-26 2013-06-12 北京交通大学 Construction method for reinforcing circular structure with large diameter by symmetric double-anchor-head pretension steel stranded wires
CN103132708A (en) * 2013-03-01 2013-06-05 东南大学 Beam-column joint reinforcing method and beam-column joint reinforcing device
CN103114753A (en) * 2013-03-01 2013-05-22 杨晨 Prestressed cylindrical silo with concealed anchoring end and processing method of stretch opening thereof
CN103132708B (en) * 2013-03-01 2015-05-06 东南大学 Beam-column joint reinforcing method and beam-column joint reinforcing device
CN103243863B (en) * 2013-05-22 2015-05-13 北京市建筑工程研究院有限责任公司 Tension anchoring system of pre-stressed wire reinforcing column and construction method
CN103243863A (en) * 2013-05-22 2013-08-14 北京市建筑工程研究院有限责任公司 Tension anchoring system of pre-stressed wire reinforcing column and construction method
CN104675139A (en) * 2015-02-25 2015-06-03 中交第四公路工程局有限公司 Multipoint fastening and reinforcing method for concrete silo structure
CN104675139B (en) * 2015-02-25 2017-03-08 中交第四公路工程局有限公司 Concrete tube chamber structure Multi-point fastening reinforcement means
CN106930587B (en) * 2017-03-03 2018-10-23 苏州中材建设有限公司 Novel pre-stressed cement produced with the dry method silo and reinforcement means
CN106930587A (en) * 2017-03-03 2017-07-07 苏州中材建设有限公司 Novel pre-stressed cement produced with the dry method silo and reinforcement means
CN107907256A (en) * 2017-11-08 2018-04-13 山东华建仓储装备科技有限公司 A kind of method that large warehoused equipment is made of prestress wire
CN108571002A (en) * 2018-04-13 2018-09-25 中交第三航务工程局有限公司 A kind of ring orientation prestress concrete boxed cofferdam and making and installation method for cushion cap foundation construction
CN109056558A (en) * 2018-08-20 2018-12-21 中铁大桥(南京)桥隧诊治有限公司 A kind of circumferential ruggedized construction and its laying method preventing pier top splitting
CN109056558B (en) * 2018-08-20 2021-01-15 中铁大桥(南京)桥隧诊治有限公司 Circumferential reinforcing structure for preventing pier top from splitting and laying method thereof
CN109989360A (en) * 2019-03-26 2019-07-09 中铁七局集团有限公司 A kind of Railway Bridges And Piers Vertical Cracks bracing means and its reinforcement means
CN110863671A (en) * 2019-12-12 2020-03-06 山东奥能电力科技有限公司 Repairing, reinforcing and reinforcing method for cement transmission tower and reinforcing component thereof
CN110863671B (en) * 2019-12-12 2020-09-25 山东电建建设集团有限公司 Repairing, reinforcing and reinforcing method for cement transmission tower and reinforcing component thereof

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