CN110273360A - A kind of self-locking prestress anchorage system and construction method - Google Patents
A kind of self-locking prestress anchorage system and construction method Download PDFInfo
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- CN110273360A CN110273360A CN201910518430.5A CN201910518430A CN110273360A CN 110273360 A CN110273360 A CN 110273360A CN 201910518430 A CN201910518430 A CN 201910518430A CN 110273360 A CN110273360 A CN 110273360A
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- 238000010276 construction Methods 0.000 title claims description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 40
- 229920001971 elastomer Polymers 0.000 claims abstract description 21
- 239000000806 elastomer Substances 0.000 claims abstract description 21
- 230000000916 dilatatory effect Effects 0.000 claims abstract description 3
- 238000004873 anchoring Methods 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000011178 precast concrete Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000004567 concrete Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 2
- 244000046052 Phaseolus vulgaris Species 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The present invention relates to a kind of self-locking prestress anchorage systems, one end is the self-locking anchor structure of predilation, including built-in fitting and drag-line assembly, built-in fitting includes being embedded in pre-buried duct together, axially through built-in pipe (10), lower anchor plate (8) and protective cover (3), multi-clove type sliding block (4) circumferentially is provided in protective cover (3), multi-clove type sliding block (4) can be collapsed radially under the squeezing action of elastomer, interim expansion locating piece (14) is arranged in multi-clove type sliding block (4) inner ring again, multi-clove type sliding block (4) inner ring is set to form the preformed hole for making drag-line assembly penetrate protective cover (3) deep from pre-buried duct；The traction cable that expansion locating piece (14) can be threaded into pushes away the interim dilating effect for falling and releasing to multi-clove type sliding block (4), and multi-clove type sliding block (4) is allowed to constitute encircling type locking to the traction cable.The application makes self-locking member have the function of predilation using expansion locating piece, and reeving, it is laborsaving time saving to construct.
Description
Technical field
The present invention relates to prestressed anchor fixing structure, the installation side of corresponding prestress anchorage system and the anchoring system
Method.
Background technique
In Construction Technology, prefabricating technique is gradually widely applied, such as the box beam of bridge, bridge pier component are first
Segmented production is carried out, is first embedded in the anchoring built-in fitting of prestress anchorage system in segmental structure in precasting yard, then be transported to
Engineering site carries out assembly paragraph by paragraph, prestressed cable component is installed between segment after assembled, by tensioning drag-line, by drag-line and anchor
Gu built-in fitting connects, overall structure shared load is formed.In some engineering applications, such as precast pier, due to anchor
After the anchoring built-in fitting of solid system one end is embedded, the construction of " blind hole " is formed, so after it will anchor drag-line and penetrate, it is desirable to
A kind of anchoring structure of energy self-locking, drag-line and anchoring built-in fitting are connected.
Application No. is 201210030063.2 Chinese patent application files, disclose a kind of " self-locking prestress anchoraging
Structure and vertical prestressing anchoring system and construction method ".It includes the structures such as multi-clove type sliding block and elastomer that the program, which uses,
Part has the function of to strut and gathering.Reeve enter when, under the action of squeezing cable body terminal guide head, strut more valves
Formula sliding block, squeezes cable body guide sleeve and anchoring cartridge enters in anchoring built-in fitting, and multi-clove type sliding block is gathered under elastomer effect, from
And the anchoring cartridge pressure-bearing for squeezing cable body is made to realize the purpose of self-locking on the sliding block after gathering.Though the program realizes self-locking
Tight function, but when the restraining force of elastomer is larger, need to apply drag-line biggish thrust, however drag-line is flexible structure
When guy cable length is longer, and drag-line specification is smaller since cable body rigidity is smaller, thrust deficiency will be present, sliding block struts difficulty in part
The risk that can not open is set.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of reeve for after construction site have predilation function
The self-locking anchor structure of energy, plays the role of effectively locking to the drag-line beam (drag-line assembly) for penetrating the anchor structure, and
This locking, which acts on after drag-line beam penetrates anchor structure, to be achieved that, is locked without external force.
The application is further directed to prestress anchorage system and its construction method with the self-locking anchor structure, should
Prestress anchorage system structure is simple, so that laborsaving simplicity of constructing of reeving.
The present invention solves the above problems used technical solution are as follows: a kind of self-locking prestress anchorage system, one end
For the self-locking anchor structure of predilation, the self-locking anchor structure of the predilation includes built-in fitting and drag-line assembly, institute
State built-in fitting include be embedded in pre-buried duct together, axially through built-in pipe, lower anchor plate and protective cover, the built-in pipe sets
It sets in lower anchor plate front end, the protective cover is arranged in lower anchor plate rear end, and more valves circumferentially are provided in protective cover
Formula sliding block, multi-clove type sliding block can be collapsed radially under the squeezing action of elastomer, and multi-clove type sliding block inner ring is arranged interim again
Locating piece is expanded, multi-clove type sliding block inner ring is made to form the preformed hole for making drag-line assembly penetrate protective cover deep from pre-buried duct；
The traction cable that can be threaded into of expansion locating piece pushes away the interim dilating effect for falling and releasing to multi-clove type sliding block, allows more valves
Formula sliding block constitutes encircling type locking to the traction cable.
The other end of self-locking prestress anchorage system is stretching end, and the anchoring built-in fitting of stretching end setting includes pre- together
Built-in pipe, upper anchor plate, tension ground tackle and the anchorage protective cover buried.
Further, the built-in pipe outer ring is arranged spiral bar, and the lower end of spiral bar resists lower anchor plate.
Further, the protective cover has circumferential step, and the multi-clove type sliding block is supported on the step, described
Multi-clove type sliding block is slided along the extended surface of step.
Preferably, the extended surface of the step radially extends or opposite centerline dip extends.
Preferably, it is mutually matched setting gib block or guide groove on the sliding contact surface of the multi-clove type sliding block, step,
The cooperation of gib block and guide groove constitutes the guiding that multi-clove type sliding block slides on step.
Preferably, the elastomer is pressure spring, and one end acts on the sliding block of the multi-clove type sliding block, and the other end acts on guarantor
Shield inner wall.
Preferably, the expansion locating piece is ring positioning ring, and the ring positioning ring is placed in the multi-clove type sliding block
Circle expands outwardly sliding block；Or expansion locating piece is the annular element with multiple positioning pin columns, multiple positioning pin column circumferential directions are erect
In terminal pad, the multiple positioning pin column acts on multi-clove type sliding block and resists gathering.
Preferably, the drag-line assembly includes prestressing steel wire bunch, and the anchor of prestressing steel wire bunch end is arranged in
Head, the limit for constituting drag-line assembly retraction is pushed against in the multi-clove type sliding block of the axial gathering and the anchor head end face.
In addition the application provides the construction method of the self-locking prestress anchorage system, steps are as follows
A. the assembling and installation of built-in fitting:
1) elastomer, multi-clove type sliding block the installation of embedded parts of the self-locking anchor structure of lower end predilation: are installed to guarantor
In shield, expansion locating piece is provisionally attached on multi-clove type sliding block inner ring, the expansion of multi-clove type sliding block is made to reserve preformed hole；Will under
Anchor plate axially connect with protective cover and is combined into one, and puts on spiral bar, connects built-in pipe, integral built-in enters precast concrete structure
In the pre-buried duct of part；Lower anchor plate and protective cover are respectively kept with grouting mouth, and are drawn from precast concrete by grouting mouth
Grout pipe anchors out to complete post-grouting sealing in prestressed strand tensioning；
2) upper end anchors installation of embedded parts: upper anchor plate, tension ground tackle, spiral bar and built-in pipe being assembled, and buried together
Enter in the prefabricated or cast-in-place concrete component built；
B., drag-line assembly and tensioning are installed
1) it makes drag-line assembly: being installed prestressed strand blanking in the lower end of steel beam according to the length of requirement of engineering
Anchor head, by prestressed strand anchoring lower ends in anchor head；
2) at the construction field (site), one end that drag-line assembly is equipped with anchor head is penetrated to the self-locking anchoring knot of lower end predilation
In the built-in pipe of structure, when anchor head passes through multi-clove type sliding block, expansion locating piece is pushed down on and is fallen by anchor head, loses the more of expansion locating piece
Flap-type sliding block collapses under the action of elastomer to prestressed strand, and radial direction axially resists anchor head while holding prestressed strand tightly
End face, constitute the limit that bounces back upwards of drag-line assembly；
3) upper end of drag-line assembly is installed in tension ground tackle, after prestressed strand tensioning, locking anchoring；
4) anchorage protective cover is installed in tension ground tackle tail portion, and carries out grouting treatment, complete self-locking pre-stressed anchorage body
The construction of system.
Detailed description of the invention
Fig. 1 is the overall schematic of the self-locking anchor structure of predilation of the present invention；
Fig. 2 is drag-line assembly structural schematic diagram of the present invention；
Fig. 3 is the structural schematic diagram of the built-in fitting of the self-locking anchor structure of predilation of the present invention；
Fig. 4 is another structural schematic diagram of the built-in fitting of the self-locking anchor structure of predilation of the present invention；
Fig. 5 is the structural schematic diagram of protective cover of the present invention；
Fig. 6 is the A direction view of Fig. 5；
Fig. 7 is the structural schematic diagram of three-clove style sliding block；
Fig. 8 is the B direction view of Fig. 7；
Fig. 9 is the structural schematic diagram as the ring positioning ring of expansion locating piece；
Figure 10 is the structural schematic diagram as the annular element with multiple positioning pin columns of expansion locating piece；
Figure 11 is the C direction view of Figure 10；
Figure 12 is the overall structure diagram of self-locking prestress anchorage system of the present invention；
In figure: I-drag-line assembly, II-built-in fitting assembly；
1- anchor head, 2- prestressed strand, 3- protective cover, 301- sealing ring mounting groove, 302- installation expansion locating piece pin hole,
303- sliding block mounting base, 4- three-clove style sliding block, 401- guide groove, 402- install the location hole of elastomer, 403- installation expansion
The locating slot of locating piece, 5- elastomer, 6- bolt, 7- sealing ring, anchor plate, 9- spiral bar, 10- built-in pipe or preform under 8-
Duct, 11- precast concrete, 12- grout pipe one, 13- grout pipe two, 14- expand locating piece, 141- ring positioning ring, 142-
Annular element with multiple positioning pin columns, 1421- positioning pin column, 1422- terminal pad, 15- gib block, the upper anchor plate of 16-, 17-
Stretching end anchorage, 18- anchorage protective cover.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment 1
As shown in Figure 1, a kind of self-locking prestressed anchor fixing structure of predilation, including drag-line assembly I and built-in fitting group
Piece installing II, built-in fitting assembly II include protective cover 3, three-clove style sliding block 4, elastomer 5, expansion locating piece 14, lower anchor plate 8,
Spiral bar 9 and built-in pipe 10；Drag-line assembly I includes anchor head 1 and prestressed strand 2, and prestressed strand 2 is anchored in anchor head 1
Anchor head 1 encases 2 end of prestressed strand, and under use state, lower anchor plate 8 is combined into one by bolt with protective cover 3, and with
Spiral bar 9, built-in pipe 10 are embedded into together in precast concrete block 11, and wherein three-clove style sliding block 4 is in elastomer 5 and expansion positioning
Under the action of part 14, three-clove style sliding block 4 is reserved and is passed through for anchor head 1 in expansion state, that is, 4 inner ring of three-clove style sliding block always
Preformed hole, drag-line assembly I is penetrated with one end of anchor head 1 from built-in pipe 10, when it passes through three-clove style sliding block 4, touching
Expansion locating piece 14 simultaneously makes it fall off.It falls into inside protective cover 3.At this time under the effect of elastomer 5, three-clove style sliding block 4 is radial to be received
Hold together and block prestressed strand, while axial and 1 end face of anchor head contradicts, keeps drag-line assembly I self-locking from constituting toward retraction
Tight prestressed anchor fixing structure.
As shown in Figure 5, Figure 6, protective cover 3 is a closed cylinder, and upper part is connect with lower anchor plate 8, when in use, by group
It is installed in protective cover 3 at the three-clove style sliding block 4 of slfactuating latch, elastomer 5, expansion locating piece 14, it is pre- to be embedded into concrete
In component processed, after concreting, an inner space is formed, is obtained so that drag-line assembly I can penetrate wherein.
As shown in Figure 7, Figure 8, three-clove style sliding block 4 is annular plate-like component, its inner circle is made to realize expansible and gather
Function is separated into identical more valve sliding block compositions, and sets up the counterbore of installation elastomer 5 in outer circle diameter
402；In the present embodiment, three-clove style sliding block 4 is made of three valve sliding blocks, as a kind of transformation of the embodiment of the present invention, constitutes three
The sliding block valve number of flap-type sliding block 4 can also increase and decrease, and form by -4 valve of 2 valve, 5 valves or by m valve, the value range of m is: m 2-36
Between arbitrary integer.
The effect of expansion locating piece 14 is to make the inner ring of three-clove style sliding block 4 before wearing drag-line assembly always in expansion
State penetrates installation convenient for drag-line assembly I.The implementation structural scheme one of locating piece 14 is expanded, as shown in figure 3, expansion is fixed
The construction of ring positioning ring 141 as shown in Figure 7 can be used in position part 14, cooperates the present embodiment, in the inner circle of three-clove style sliding block 4
The mounting groove 403 (as shown in Figure 8) of locating ring 141 is provided on surface.By technical thought of the invention, ring positioning ring 141
Construction be not limited to be made of round bar material as shown in Figure 7, circular cylinder or cartridge body configuration can also be used.
Another structural scheme two of locating piece 14 is as shown in figure 4, expansion locating piece 14 can be used and as shown in Figure 8 have
The construction of the annular element 142 of multiple pins cooperates embodiment, is provided with pin on the sliding block mounting base 303 of protective cover 3
Hole 302 (as shown in Figure 5, Figure 6).
In order to allow sliding block accurately radially to collapse, the bottom surface of three-clove style sliding block 4 is provided with guide groove 401, on protective cover 3
A circumferential step is formed, for the extended surface of the step perpendicular to central axis, sliding block is axially supported at ledge surface, the extension
It is arranged again on face and the matched gib block 15 of the guide groove.
For protective cover 3 with lower anchor plate 8 it is ensured that sealed reliable connects, protective cover 3 and lower anchor plate 8 use flanged joint,
Sealing ring mounting groove 301 is set on the flange mounting surface of protective cover 3, elastic seal ring is set in the sealing ring mounting groove 301
7。
Compared with the technology of the patent publication us of Publication No. 102535755A, the self-locking of the predilation of the application is pre-
The advantages of stress anchor structure, is:
(1) multi-clove type sliding block makes it have interim the planning function using expansion locating piece, and sliding block is made to be in the " normal of expansion
Open " state, reeving, it is laborsaving time saving to construct, and meets engineering actual demand；And no setting is required for the end of drag-line assembly guide head, letter
Structure is changed.
Embodiment 2
Lower end of the self-locking anchor structure for the predilation that embodiment 1 is related to as self-locking prestress anchorage system, from
The upper end for locking prestress anchorage system is stretching end, and the anchoring built-in fitting of stretching end includes built-in pipe pre-buried together, upper anchor
Backing plate 16, stretching end anchorage 17 and anchorage protective cover 18, stretching end anchorage 17 are the known anchorage for having wire sub-panel, prestressing force
Wire sub-panel is penetrated after the steel wire sub-wire of steel beam and fixes steel wire in the sub-wire hole of bean vermicelli plate setting fixture, carries out anchor after tensioning
Gu.
Embodiment 3
A kind of installation method of the self-locking prestress anchorage system of embodiment 2, comprising the following steps:
A. the assembling and installation of built-in fitting:
1) each component of the built-in fitting assembly II with self-locking structure processed is assembled, by elastomer 5,
Three-clove style sliding block 4 is positioned in protective cover 3, and expands three-clove style sliding block 4, and expansion locating piece 14 is installed on sliding block 4, is made
Three-clove style sliding block 4 is in expansion state always；Lower anchor plate 8 is combined into one with protective cover 3 by bolt, and and spiral bar
9, built-in pipe 10 is embedded into together in precast concrete 11；Lower anchor plate 8 and protective cover 3, which are respectively kept with grouting mouth 12, can draw filling
Pipe is starched so that post-grouting sealing is completed in 2 tensioning of prestressed strand；
2) reserving hole channel 10 is installed or made, is segmented in prefabricated or casting process in concrete component 11, by embedded pre-
Pipe laying 10 or reserved forming technology production prestress anchoraging drag-line pass through duct 10；
3) installation of the anchoring built-in fitting of stretching end, the upper end anchoring piece of self-locking prestress anchorage system are generally conventional
The upper anchor plate 16, spiral bar 9 and built-in pipe 10 of upper end anchoring piece are embedded to prefabricated or cast-in-place coagulation by prestressed anchor product
In native component 11.
B., drag-line assembly and tensioning are installed
1) fabrication and installation drag-line assembly I: according to the length of requirement of engineering, by 2 blanking of prestressed strand, the one of steel beam
End installation anchor head 1, and through anchor processed (or filling anchor) processing, steel beam 2 is anchored on anchor head 1；At the construction field (site), by drag-line assembly
I one end for being equipped with anchor head 1 penetrates from above-mentioned upper anchor plate 16, and by pre-buried pipeline 10, arrival contains self-locking structure
Three-clove style sliding block 4 when, anchor head touching expansion locating piece 14 simultaneously so that it is fallen off, at this time elastomer 5 effect under, three-clove style sliding block
4 collapse holding prestressed strand, and axial and anchor head 1 composition limits, and prevent drag-line assembly I from past retraction, so that composition is certainly
The prestress anchoraging component of locking；
2) stretching end anchorage 17 is installed in the upper end of drag-line assembly, penetrates wire sub-panel after the steel wire sub-wire of prestressed strand
And steel wire is fixed in the sub-wire hole of bean vermicelli plate setting fixture, it is anchored after tensioning, and lock anchoring；
3) anchorage protective cover 18 is installed, and carries out grouting treatment.So far, the self-locking prestress anchorage system installation of single beam
Construction is completed.
Claims (10)
1. a kind of self-locking prestress anchorage system, one end is the self-locking anchor structure of predilation, it is characterised in that: described
The self-locking anchor structure of predilation includes built-in fitting and drag-line assembly, and the built-in fitting includes being embedded in pre-buried duct together
It is interior, axially through built-in pipe (10), lower anchor plate (8) and protective cover (3), the built-in pipe is arranged before lower anchor plate (7)
End, protective cover (3) setting are provided with multi-clove type sliding block circumferentially in lower anchor plate (8) rear end in protective cover (3)
(4), multi-clove type sliding block (4) can be collapsed radially under the squeezing action of elastomer, and multi-clove type sliding block (4) inner ring is arranged temporarily again
Expansion locating piece (14), make the formation of multi-clove type sliding block (4) inner ring that drag-line assembly be made from pre-buried duct to penetrate protective cover (3) deep
The preformed hole in portion；The traction cable that expansion locating piece (14) can be threaded into, which pushes away, to be fallen and releases to multi-clove type sliding block (4)
Interim dilating effect allows multi-clove type sliding block (4) to constitute encircling type locking to the traction cable.
2. self-locking prestress anchorage system according to claim 1, it is characterised in that: its other end is stretching end,
The anchoring built-in fitting of pull end setting, is protected including built-in pipe pre-buried together, upper anchor plate (16), stretching end anchorage (17) and anchorage
Shield (18).
3. self-locking prestress anchorage system according to claim 1, it is characterised in that: the built-in pipe outer ring is arranged spiral shell
It revolves muscle (9), the lower end of spiral bar (9) resists lower anchor plate (8).
4. self-locking prestress anchorage system according to claim 1, it is characterised in that: the protective cover (3) has ring
To step, the multi-clove type sliding block (4) is supported on the step, the multi-clove type sliding block (4) along step extended surface
Sliding.
5. self-locking prestress anchorage system according to claim 4, it is characterised in that: the extended surface of the step
It radially extends or opposite centerline dip extends.
6. self-locking prestress anchorage system according to claim 4, it is characterised in that: the multi-clove type sliding block (4), platform
Setting gib block (15) or guide groove (401), gib block (15) and guide groove (401) are mutually matched on the sliding contact surface of rank
Cooperation constitute multi-clove type sliding block (4) guiding for sliding on step.
7. self-locking prestress anchorage system according to claim 4, it is characterised in that: the elastomer (5) is pressure spring,
One end acts on the sliding block of the multi-clove type sliding block (4), and the other end acts on protective cover (3) inner wall.
8. self-locking prestress anchorage system according to claim 1, it is characterised in that: the expansion locating piece (14) is
Ring positioning ring (141), the ring positioning ring (141) are placed in multi-clove type sliding block (4) inner ring and expand outwardly sliding block；
Or expansion locating piece (14) is the annular element (142) with multiple positioning pin columns, multiple positioning pin columns (1421)
Circumferential direction is erected on terminal pad (1422), and the multiple positioning pin column acts on multi-clove type sliding block (4) and resists gathering.
9. self-locking prestress anchorage system according to claim 1, it is characterised in that: the drag-line assembly includes pre-
Stress wire beam (2), and the anchor head (1) in prestressing steel wire bunch (2) end is set, in the multi-clove type sliding block of the axial gathering
(4) limit for constituting drag-line assembly retraction is pushed against with the anchor head (1) end face.
10. it is a kind of according to claim 1 in -9 self-locking prestress anchorage system described in any claim construction method,
It is characterized by: steps are as follows
C. the assembling and installation of built-in fitting:
3) elastomer, multi-clove type sliding block the installation of embedded parts of the self-locking anchor structure of lower end predilation: are installed to protective cover
It is interior, expansion locating piece is provisionally attached on multi-clove type sliding block inner ring, the expansion of multi-clove type sliding block is made to reserve preformed hole；To cast anchor pad
Plate axially connect with protective cover and is combined into one, and puts on spiral bar, connects built-in pipe, integral built-in enters precast concrete
In pre-buried duct；Lower anchor plate and protective cover are respectively kept with grouting mouth, and draw filling from precast concrete by grouting mouth
Pipe is starched to complete post-grouting sealing anchoring in prestressed strand tensioning；
4) upper end anchors installation of embedded parts: upper anchor plate, stretching end anchorage, spiral bar and built-in pipe being assembled, and are embedded to together
In the prefabricated or cast-in-place concrete component built；
D., drag-line assembly and tensioning are installed
5) it makes drag-line assembly: according to the length of requirement of engineering, by prestressed strand blanking, anchor being installed in the lower end of steel beam
Head, by prestressed strand anchoring lower ends in anchor head；
6) at the construction field (site), one end that drag-line assembly is equipped with anchor head is penetrated to the self-locking anchor structure of lower end predilation
In built-in pipe, when anchor head passes through multi-clove type sliding block, expansion locating piece is pushed down on and is fallen by anchor head, loses the multi-clove type of expansion locating piece
Sliding block collapses under the action of elastomer to prestressed strand, and radial direction axially resists the end of anchor head while holding prestressed strand tightly
Face constitutes the limit that drag-line assembly bounces back upwards；
7) upper end of drag-line assembly is installed in tension ground tackle, after prestressed strand tensioning, locking anchoring；
8) anchorage protective cover is installed in tension ground tackle tail portion, and carries out grouting treatment, complete self-locking prestress anchorage system
Construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910518430.5A CN110273360A (en) | 2019-06-15 | 2019-06-15 | A kind of self-locking prestress anchorage system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910518430.5A CN110273360A (en) | 2019-06-15 | 2019-06-15 | A kind of self-locking prestress anchorage system and construction method |
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| CN110273360A true CN110273360A (en) | 2019-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605239A (en) * | 2021-07-16 | 2021-11-05 | 柳州欧维姆机械股份有限公司 | Prestressed anchoring structure system for bridge pier assembly and bridge pier assembly construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210916977U (en) * | 2019-06-15 | 2020-07-03 | 江阴法尔胜住电新材料有限公司 | Self-locking prestressed anchoring system |
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| CN113605239A (en) * | 2021-07-16 | 2021-11-05 | 柳州欧维姆机械股份有限公司 | Prestressed anchoring structure system for bridge pier assembly and bridge pier assembly construction method thereof |
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