CN102535755A - Self-locked prestressed anchoring structure, vertical prestressed anchoring system and construction method - Google Patents
Self-locked prestressed anchoring structure, vertical prestressed anchoring system and construction method Download PDFInfo
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- CN102535755A CN102535755A CN2012100300632A CN201210030063A CN102535755A CN 102535755 A CN102535755 A CN 102535755A CN 2012100300632 A CN2012100300632 A CN 2012100300632A CN 201210030063 A CN201210030063 A CN 201210030063A CN 102535755 A CN102535755 A CN 102535755A
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Abstract
The invention discloses a self-locked prestressed anchoring structure, comprising an embedded part with a split structure and an extrusion cable body, wherein the embedded part comprises a rear protective hood, a multi-piece slide block, an elastomer, an anchoring backing plate, a spiral bar and an embedded pipe; the extrusion cable body comprises a guide head, an anchoring sleeve and a prestressed bar; the prestressed bar is anchored by the anchoring sleeve and the top end of the prestressed bar is provided with the guide head; and the vertical prestressed anchoring system with the structure comprises a lower-end anchoring unit and an upper-end anchoring unit which respectively have a self-locked prestressed anchoring structure. When the self-locked prestressed anchoring structure is used, the lower anchoring backing plate is combined with the rear protective hood into a whole by using bolts and is embedded together with the spiral bar and the embedded pipe into a prefabricated concrete block; one end of the extrusion cable body with the guide head is penetrated from the embedded pipe and then passes through the multi-piece slide block, and finally, the multi-piece slide block is gathered together to lock the anchoring sleeve of the extrusion cable body in the action of the elastomer; therefore, the prestressed bar cannot be retracted and the lower-end anchoring unit of the self-locked prestressed anchoring structure with the slide block is formed. The self-locked vertical prestressed anchoring system has a simple structure and is convenient in construction.
Description
Technical field
The present invention relates to a kind of prestressed anchor fixing structure and prestress anchorage system and job practices thereof, particularly a kind of self-locking prestressed anchor fixing structure and with the vertical prestressing anchoring system and the job practices thereof of this self-locking prestressed anchor fixing structure.
Background technology
Prefabricated subsection assembling construction method is the job practices that just grows up in nearly 40 years.Prefabricated subsection assembly unit principle is to put on the pressure on the concrete segment by prestressing tendon, makes that contact surface fits tightly between sections, forms overall structure and bears load jointly, and its advantage has: 1) prefabricate, and construction quality is good; 2) speed of application is fast, and the duration is short; 3) easy construction, little to surrounding environment influence.
The prestressing force that is applied in the present prefabricated subsection assembling construction is normally with an end anchoring of presstressed reinforcing steel and be embedded in the concrete as fixed end, and along with the increase of splicing precast concrete block, presstressed reinforcing steel must connect lengthening with connector thereupon; Perhaps the sufficiently long presstressed reinforcing steel of intercepting guarantees that with equipment traction presstressed reinforcing steel the one of which end exceeds concrete block to guarantee to accomplish anchoring and the stretch-draw to presstressed reinforcing steel at last along with the continuous increase of precast concrete block in advance.Its construction technology very complicated, and presstressed reinforcing steel to expose the time longer, can't change, as easy as rolling off a logly cause getting rusty or damaging of presstressed reinforcing steel, cause the prestressed quality that applies to can not get guaranteeing.。
Summary of the invention
The object of the present invention is to provide and a kind ofly be applicable to the self-locking prestressed anchor fixing structure of prefabricated subsection assembling construction and to have the vertical prestressing anchoring system and the job practices thereof of this structure; This vertical prestressing anchoring system is simple in structure; Reasonable stress, its fabrication and installation process easy construction; Can greatly reduce the construction period; Another object of the present invention provides the job practices (being the fabrication and installation methods) of the vertical prestressing anchoring system of this band self-locking structure, realizes with the purpose of the vertical prestressing anchoring system that guarantees band self-locking prestressed anchor fixing structure of the present invention.
The technical scheme that addresses the above problem is: a kind of self-locking prestressed anchor fixing structure comprises the built-in fitting of isolating construction and pushes cable body that said built-in fitting comprises back protective cover, multi-clove type slide block, elastic body, following anchor plate, spiral bar and pre-buried pipe; Said extruding cable body comprises guide head, anchoring cartridge and presstressed reinforcing steel, and presstressed reinforcing steel is by the anchoring cartridge anchoring, and there is guide head on its top; Under the user mode; Following anchor plate is combined into one through bolt and back protective cover, and is embedded in the precast concrete block with spiral bar, pre-buried pipe, and the extruding cable body has an end of guide head to penetrate from pre-buried pipe; Behind the multi-clove type slide block; Under elastomer, the multi-clove type slide block is gathered the anchoring cartridge that blocks the extruding cable body, thereby makes presstressed reinforcing steel not constitute slide block type self-locking prestressed anchor fixing structure toward retraction.
Its further technical scheme is: said multi-clove type slide block is made up of two lobes or many lobes slide block, lumps together to form the cylinder that centre bore is arranged, and the top of this centre bore is that bellmouth, bottom are straight hole; Said bellmouth is that cross section is circular round taper hole or is triangular bellmouth, rectangular pyramid shape hole or the p pyramid hole of triangle, quadrangle or p limit shape by the cross section that the inclined-plane with guide effect constitutes; The cross-sectional profile of the cylinder that said many lobes slide block is formed is circle, quadrangle, hexagon or n limit shape, and the many lobes that constitute the multi-clove type slide block refer to the m lobe, on every sliding lobe of multi-clove type slide block, has to place elastomeric groove; The span of above-mentioned p, m, n is: p is the arbitrary integer between the 3-12; M is the arbitrary integer between the 2-36, and n is the arbitrary integer between the 2-36.
Its technical scheme further is: described elastic body or spring or elastomer block; The elastomeric groove of on every sliding lobe of multi-clove type slide block, opening of placement is the blind hole of upwards opening in the footpath of every sliding lobe, in each blind hole, is placed with a spring or elastomer block;
Described elastic body or the cyclic spring hoop that is made into elastomeric material; The elastomeric groove of on every sliding lobe of multi-clove type slide block, opening of placement is at the continuous groove of every sliding lobe along the placement cyclic spring hoop of opening on the outer rim direction, and the position and the groove size of the continuous groove on the sliding lobe of each piece are consistent.
The profile of the guide head of said extruding cable body is bullet-headed or conical or cross section is the triangular pyramid bodily form, the rectangular pyramid bodily form of triangle, quadrangle or p limit shape or the p pyramid bodily form that matches with the bellmouth of the centre bore of multi-clove type slide block 5, and P is the arbitrary integer between the 3-12.
Another related art scheme of the present invention is: a kind of vertical prestressing anchoring system; Comprise that anchoring has the anchoring unit, lower end and the anchoring unit, upper end of presstressed reinforcing steel one end; Anchoring unit, said upper end comprises and is placed on the stretch-draw end ground tackle that is used for the anchoring presstressed reinforcing steel other end on the anchor plate; Anchoring unit, described lower end is the above-mentioned self-locking prestress anchoraging element of construction of the present invention; Comprise the built-in fitting and extruding cable body of isolating construction, said built-in fitting comprises back protective cover, multi-clove type slide block, elastic body, following anchor plate, spiral bar and pre-buried pipe; Said extruding cable body comprises guide head, anchoring cartridge and presstressed reinforcing steel, and presstressed reinforcing steel is by the anchoring cartridge anchoring, and there is guide head on its top; Under the user mode; Following anchor plate is combined into one through bolt and back protective cover, and is embedded in the precast concrete block with spiral bar, pre-buried pipe, and the extruding cable body has an end of guide head to penetrate from pre-buried pipe; Behind the multi-clove type slide block; Under elastomer, the multi-clove type slide block is gathered the anchoring cartridge that blocks the extruding cable body, thereby makes presstressed reinforcing steel can not constitute the anchoring unit, lower end of band slide block type self-locking prestressed anchor fixing structure toward retraction.
Its further technical scheme is: described pre-buried pipeline or pre-buried pipe or reserving the moulding duct when prefabricated by sections bridge pier, sections column or sections clump constitutes; The cross section of said pre-buried pipeline is circle, rectangle, hexagon or octagon.
The another technical scheme relevant with related art scheme is: a kind of job practices of vertical prestressing anchoring system, and this method may further comprise the steps:
A. built-in fitting is installed:
1. at first with each component-assembled of built-in fitting, elastic body and multi-clove type slide block are positioned in the protective cover of back; To descend anchor plate and back protective cover to be combined into one through bolt, and be embedded in the precast concrete block with spiral bar, pre-buried pipe, this concrete block will be as the anchor block of total; Following anchor plate leaves that grouting mouthful can be drawn grout pipe so that the post-grouting sealing is accomplished in stretch-draw;
2. install or make pre-buried pipeline:
Constitute if described pre-buried pipeline is pre-buried pipe, then adopt the construction technology of segmentation welding, concreting in lifts; Along with constantly building of pier shaft increased, it is long that pre-buried pipe also will add welding thereupon; The last pre-buried anchor plate of going up is accomplished pier shaft and is built;
If described pre-buried pipeline adopts by sections bridge pier, sections column or sections clump and reserves the moulding duct when prefabricated and constitute, then when prefabricated subsection bridge pier, sections column or sections clump, reserve the moulding duct and get final product;
3. go up the pre-buried of anchor plate,, then go up anchor plate and connect pre-buried pipe and be embedded in the concrete topmost as adopting the concreting in lifts construction; As adopt segmental precast erection method construction, then go up anchor plate and can imbed in advance in the sections concrete block, with its concrete block as the top layer of section assembling;
B. the vertical prestressing system installs and stretch-draw:
1. fabrication and installation extruding cable body: in factory according to actual requirement of engineering with foot length degree under the presstressed reinforcing steel and be prefabricated into the extruding cable body, during construction, have an end of guide head to penetrate the extruding cable body from the concrete embedded last anchor plate of prefabricated subsection assembly unit; Through pre-buried pipeline; When reaching the multi-clove type slide block that contains built-in fitting, the guide head of extruding cable body contacts with the conical surface of the multi-clove type slide block of built-in fitting, under the effect of the lateral thrust of guide head; Each slide block that constitutes the multi-clove type slide block scatters to direction radially; The centre bore of multi-clove type slide block enlarges, after the anchoring cartridge of extruding cable body passes through the multi-clove type slide block smoothly, because elastomeric effect; The multi-clove type slide block is gathered and is blocked anchoring cartridge, thereby makes presstressed reinforcing steel not form anchoring unit, lower end toward retraction;
2. the presstressed reinforcing steel upper end is penetrated stretch-draw end ground tackle, and utilize tensioning equipment and anchor clamps to carry out anchoring stretch-draw, form anchoring unit, upper end after stretch-draw finishes;
3.: load onto seal closure, the sealing of can being in the milk, single presstressed reinforcing steel is arranged and is accomplished;
The vertical prestressing anchoring system that single presstressed reinforcing steel constitutes also forms.
The present invention's self-locking prestressed anchor fixing structure and vertical prestressing anchoring system and job practices have following beneficial effect:
1. construction technology is easy, and quality is prone to guarantee:
Existing integral cast-in-situ bridge pier vertical prestressing anchoring system job practices is: presstressed reinforcing steel one end and fixed end ground tackle are fixed earlier imbed in the cushion cap, the other end must be vertical to guarantee it through the equipment traction; Increase along with what pier shaft was built, also corresponding the moving of pulling equipment raised; Its very complicated of constructing, and presstressed reinforcing steel to expose the time longer, can't change, as easy as rolling off a logly cause getting rusty or damaging of presstressed reinforcing steel, cause the prestressed quality that applies to can not get guaranteeing;
And the present invention has the vertical prestressing anchoring system of self-locking prestressed anchor fixing structure; Comprise that anchoring has the anchoring unit, lower end and anchoring unit, the upper end III of presstressed reinforcing steel one end, anchoring unit, described lower end is a self-locking prestress anchoraging element of construction, comprises the built-in fitting I and extruding cable body II of isolating construction; The vertical prestressing anchoring system construction that has a self-locking structure of the present invention the time need only be imbedded the precalculated position with the built-in fitting I and get final product; Treat that bridge abutment integral builds the extruding cable body II that has presstressed reinforcing steel after finishing again and import and the location, conveniently carry out stretching construction, outside construction period, presstressed reinforcing steel need not be exposed to for a long time; The corrosion and the damage of presstressed reinforcing steel have been avoided; Particularly have the self-locking structure of being made up of multi-clove type slide block 5 and elastic body 7 in the built-in fitting I, in use, extruding cable body I has an end of guide head 1 to penetrate from pre-buried pipe 10; Behind multi-clove type slide block 5; Under elastic body 7 effects, multi-clove type slide block 5 is gathered the anchoring cartridge that blocks extruding cable body II, thereby makes presstressed reinforcing steel 3 not constitute slide block type self-locking prestressed anchor fixing structure toward retraction; The presstressed reinforcing steel other end is the III anchoring of anchoring unit in the upper end, can carry out anchoring stretch-draw according to actual requirement of engineering, accomplishes prestressed applying; Anchoring quality is reliable, has further guaranteed construction quality; And changed present integral cast-in-situ bridge pier utilization vertical prestressing anchoring system must be in the face of the present situation of loaded down with trivial details construction technology.
2, help promoting the development that the bridge pier standardization is built:
Prefabricated subsection assembly unit bridge pier is the bridge pier sections that is prefabricated in the factory; Be assembled into integral body at the scene, this Bridge Pier Construction form has reduced dependence and the influence to environment, and prefabricated units are produced under factory's controlled condition; Can satisfy the different shape size, and guarantee that size is accurate, superior in quality;
The present invention has the convenient prefabricated subsection assembly unit bridge pier that adopts of vertical prestressing anchoring system of self-locking prestressed anchor fixing structure, has and constructs simply, has good runback potential energy power and the stressed advantage of uniform of presstressed reinforcing steel; And through appropriate design presstressed reinforcing steel content and control stress for prestressing, can guarantee that bridge pier seam when normal the use do not open, with integral cast-in-situ bridge pier functional performance basically identical; Thereby promote the development that China's bridge pier standardization is built.
3, utilization scope is wide: the vertical prestressing anchoring system that the present invention has a self-locking prestressed anchor fixing structure not only is applicable to the foundation of the vertical prestressing system of bridge pier; Also can on the engineering of needs utilization vertical prestressings (for example: column or clump) such as heavy construction, bridge, dam, large-sized concrete housing, arrange many places, thereby form vertical prestress system.
Below in conjunction with accompanying drawing and embodiment the present invention's the self-locking prestressed anchor fixing structure and the technical characterictic of vertical prestressing anchoring system and job practices are described further.
Description of drawings
Fig. 1: the overall structure sketch map of self-locking prestressed anchor fixing structure of the present invention;
Fig. 2: the extruding cable body structural representation of self-locking prestressed anchor fixing structure;
Fig. 3: the embedded part structure sketch map of self-locking prestressed anchor fixing structure;
Fig. 4-1～Fig. 4-2: the back protective cover structural representation that constitutes built-in fitting:
The A of Fig. 4-1: Fig. 4-2 is to view,
Fig. 4-2: the main sectional view of looking;
Fig. 5-1～Fig. 5-2: one of three-clove style slide block structure sketch map of formation built-in fitting (elastic body is spring or other elastomer blocks);
The B-B sectional view of Fig. 5-1: Fig. 5-2,
The vertical view of Fig. 5-2:5-1;
Fig. 5-3～Fig. 5-4: two (supporting elastic body is an elastic cuffs) that constitute the three-clove style slide block structure sketch map of built-in fitting:
The C-C sectional view of Fig. 5-3: Fig. 5-4,
The vertical view of Fig. 5-4:5-3;
Fig. 6: the overall structure sketch map of the vertical prestressing anchoring system of band slide block type self-locking structure of the present invention:
Fig. 7-1～Fig. 7-2: pre-buried pipeline configuration sketch map:
One of D-D sectional view of Fig. 7-1: Fig. 6 (pre-buried pipeline is pre-buried pipe),
Two (pre-buried pipeline is for reserving the moulding duct) of the D-D sectional view of Fig. 7-2: Fig. 6.
Among the figure:
I-built-in fitting, II-extruding cable body, III-anchoring unit, upper end;
The 1-guide head, 2-anchoring cartridge, 3-presstressed reinforcing steel, protective cover behind the 4-, 5-multi-clove type slide block, the centre bore of 501-multi-clove type slide block, mounting spring of opening on the sliding lobe of 502-multi-clove type slide block or elastomeric hole, the continuous groove of opening on the sliding lobe of 503-multi-clove type slide block; The 6-bolt, 7-elastic body, 701-spring, 702-cyclic spring hoop, anchor plate under the 8-; The 9-spiral bar, the pre-buried pipe of 10-, 11-precast concrete block, the last anchor plate of 12-, 13-stretch-draw end anchor slab; 14-work clip sheet, 15-sealing-plug, the last seal closure of 16-, 17-grout pipe and grouting mouth.
The specific embodiment
Embodiment one:
A kind of self-locking prestressed anchor fixing structure; As shown in Figure 1; This self-locking prestressed anchor fixing structure comprises the I and extruding cable body of isolating construction, and said built-in fitting I comprises back protective cover 4, multi-clove type slide block 5, bolt 6, elastic body 7, following anchor plate 8, spiral bar 9 and pre-buried pipe 10; Said extruding cable body II comprises guide head 1, anchoring cartridge 2 and presstressed reinforcing steel 3, and presstressed reinforcing steel 3 is by anchoring cartridge 2 anchorings, and there is guide head 1 on its top; Under the user mode; Following anchor plate 8 is combined into one through bolt and back protective cover 4, and is embedded in the precast concrete block 11 with spiral bar 9, pre-buried pipe 10, and extruding cable body I has an end of guide head 1 to penetrate from pre-buried pipe 10; Behind multi-clove type slide block 5; Under elastic body 7 effects, multi-clove type slide block 5 is gathered the anchoring cartridge 2 that blocks extruding cable body II, thereby makes presstressed reinforcing steel 3 not constitute slide block type self-locking prestressed anchor fixing structure toward retraction.
Said back protective cover 4 is cylindrical shells of step in top has; Its top engages with following anchor plate 8; Its effect is that the anchor head for the extruding cable body comprises: guide head 1, anchoring cartridge 2 and an airtight space is provided as the multi-clove type slide block 5 and the elastic body 7 of slfactuating latch; In the present embodiment, said back protective cover 4 is the cylinders (referring to Fig. 4-1～Fig. 4-2) that have disk; As a kind of conversion of the embodiment of the invention, the shape of said back protective cover 4 can also be a shape arbitrarily, as long as its top can engage with following anchor plate 8, back protective cover 4 is employing plastics or metal sheet roof coverings making generally.
Said multi-clove type slide block 5 is made up of identical many lobes slide block, lumps together to form the cylinder that centre bore 501 is arranged, and the top of this centre bore 501 is that bellmouth, bottom are straight hole; In the present embodiment, said bellmouth is that cross section is circular round taper hole (referring to Fig. 5-1～Fig. 5-4); As a kind of conversion of the embodiment of the invention, said bellmouth also can be that to have the cross section that the inclined-plane of guide effect constitutes be triangular bellmouth, rectangular pyramid shape hole or the p pyramid hole of triangle, quadrangle or p limit shape; Its role is to guide head 1 when being in contact with it, the presstressed reinforcing steel 3 of band anchoring cartridge 2 is passed through smoothly, the span of above-mentioned p is: p is the arbitrary integer between the 3-12.
In the present embodiment; Said multi-clove type slide block 5 is made up of three lobe slide blocks, and as a kind of conversion of the embodiment of the invention, the slide block lobe number of said formation multi-clove type slide block 5 can also increase and decrease; Form by 2 lobes, 4 lobes, 5 lobes or by the m lobe, the span of m is: m is the arbitrary integer between the 2-36;
In the present embodiment, the cross-sectional profile of the cylinder that said many lobes slide block is formed is circular; As a kind of conversion of the embodiment of the invention, the cross-sectional profile of the cylinder that said many lobes slide block is formed can also be quadrangle, hexagon or n limit shape, and the span of n is: n is the arbitrary integer between the 2-36.
The profile of the guide head 1 of said extruding cable body I is bullet-headed or conical; Can also be that cross section is the triangular pyramid bodily form, the rectangular pyramid bodily form of triangle, quadrangle or p limit shape or the p pyramid bodily form that matches with the bellmouth of the centre bore of multi-clove type slide block 5, P be the arbitrary integer between the 3-12.
In the present embodiment; Said elastic body 7 is spring 701 (referring to Fig. 1); A kind of conversion as the embodiment of the invention; Described elastic body also can be other the elastomer block that elasticity can make multi-clove type slide block 5 flexible (promptly open or gather) that has, and upwards has placement blind hole 502 spring or elastomer block in the footpath of every sliding lobe of multi-clove type slide block, in each blind hole 502, is placed with a spring or elastomer block.
Another conversion as the embodiment of the invention; It is said that can to make the elastic body of multi-clove type slide block 5 flexible (promptly open or gather) can also be the cyclic spring hoop 702 (referring to Fig. 5-3～Fig. 5-4) that is made into elastomeric material; Along having the continuous groove 503 of placing cyclic spring hoop 702 on the outer rim direction, the position and the groove size of the continuous groove 503 on the sliding lobe of each piece are consistent at every sliding lobe of multi-clove type slide block.
Embodiment two:
A kind of vertical prestressing anchoring system that has self-locking prestressed anchor fixing structure; Comprise that anchoring has the anchoring unit, lower end and anchoring unit, the upper end III of presstressed reinforcing steel one end; Anchoring unit, said upper end III comprises and is placed on the stretch-draw end anchor slab 13 and work clip sheet 14 that is used for the anchoring presstressed reinforcing steel other end on the anchor plate 12; Anchoring unit, described lower end is the embodiment of the invention one a described self-locking prestress anchoraging element of construction; Comprise the built-in fitting I and extruding cable body II of isolating construction, said built-in fitting I comprises back protective cover 4, multi-clove type slide block 5, bolt 6, elastic body 7, following anchor plate 8, spiral bar 9 and pre-buried pipe 10; Said extruding cable body II comprises guide head 1, anchoring cartridge 2 and presstressed reinforcing steel 3, and presstressed reinforcing steel 3 is by anchoring cartridge 2 anchorings, and there is guide head 1 on its top; Under the user mode; Following anchor plate 8 is combined into one through bolt and back protective cover 4, and is embedded in the precast concrete block 11 with spiral bar 9, pre-buried pipe 10, and extruding cable body II has an end of guide head 1 to penetrate from pre-buried pipe 10; Behind multi-clove type slide block 5; Under elastic body 7 effects, multi-clove type slide block 5 is gathered the anchoring cartridge 2 that blocks extruding cable body II, thereby makes presstressed reinforcing steel 3 can not constitute the anchoring unit, lower end (referring to Fig. 6) of band slide block type self-locking prestressed anchor fixing structure toward retraction;
Described pre-buried pipeline 10 or pre-buried pipe 101 or reserving moulding duct 102 when prefabricated by sections bridge pier, sections column or sections clump constitutes; The cross section of said pre-buried pipeline is circle, rectangle, hexagon or octagon (referring to Fig. 7-1～Fig. 7-2).
A kind of conversion as the embodiment of the invention; Anchoring unit, said upper end III can also be to adopt the other end of other anchorage style anchoring presstressed reinforcing steels; For example: after the upper end presstressed reinforcing steel also can adopt and put anchoring cartridge; Push anchoring, outer then cutting thread forms the stretch-draw anchor end, and attaching nut carries out stretch-draw anchor.
Embodiment three:
A kind of embodiment two said job practicess that have the vertical prestressing anchoring system of self-locking prestressed anchor fixing structure may further comprise the steps:
A. the built-in fitting I is installed:
1. at first with each component-assembled of built-in fitting I, elastic body 7 is positioned in the protective cover 4 of back with multi-clove type slide block 5; To descend anchor plate 8 and back protective cover 4 to be combined into one through bolt 6, and be embedded in the precast concrete block 11 with spiral bar 9, pre-buried pipe 10, this concrete block will be as the anchor block of total; Following anchor plate 8 leaves that grouting mouthfuls 17 can be drawn grout pipe so that the post-grouting sealing is accomplished in stretch-draw;
2. install or make pre-buried pipeline:
Constitute if described pre-buried pipeline is pre-buried pipe 101, then adopt the construction technology of segmentation welding, concreting in lifts; Along with constantly building of pier shaft increased, it is long that pre-buried pipe 101 also will add welding thereupon; The last pre-buried anchor plate of going up is accomplished pier shaft and is built;
If described pre-buried pipeline adopts by sections bridge pier, sections column or sections clump and reserves moulding duct 102 when prefabricated and constitute, then when prefabricated subsection bridge pier, sections column or sections clump, reserve moulding duct 102 and get final product;
3. go up the pre-buried of anchor plate,, then go up anchor plate 12 and connect pre-buried pipe and be embedded in the concrete topmost as adopting the concreting in lifts construction; As adopt segmental precast erection method construction, then go up anchor plate 12 and can imbed in advance in the sections concrete block, with its concrete block as the top layer of section assembling;
B. the vertical prestressing system installs and stretch-draw:
1. fabrication and installation extruding cable body II: in factory according to actual requirement of engineering with 3 times foot length degree of presstressed reinforcing steel and be prefabricated into extruding cable body II; During construction, there is an end of guide head 1 to penetrate extruding cable body II, through pre-buried pipeline from the concrete embedded last anchor plate of prefabricated subsection assembly unit; When reaching the multi-clove type slide block 5 that contains the built-in fitting I; The guide head 1 of extruding cable body II contacts with the conical surface of the multi-clove type slide block 5 of built-in fitting I, and under the effect of the lateral thrust of guide head 1, each slide block of formation multi-clove type slide block 5 scatters to direction radially; The centre bore of multi-clove type slide block 5 enlarges; After the anchoring cartridge 2 of extruding cable body II passes through multi-clove type slide block 5 smoothly, block anchoring cartridge 2 because the effect of elastic body 7 makes multi-clove type slide block 5 gather, thereby make presstressed reinforcing steel 3 not form anchoring unit, lower end toward retraction;
2. the presstressed reinforcing steel upper end is penetrated stretch-draw end anchor slab 13 also with work clip sheet 14 clampings; Can carry out stretch-draw after the bridge pier concrete strength meets the demands, form anchoring unit, upper end III after stretch-draw finishes;
3.: load onto seal closure 16, can be in the milk, the grouting back is with the sealing-plug sealing, and single presstressed reinforcing steel is arranged and accomplished;
The vertical prestressing anchoring system that single presstressed reinforcing steel constitutes also forms.
As a kind of conversion of the embodiment of the invention, if anchoring unit, said upper end III adopts the other end of other anchorage style anchoring presstressed reinforcing steels, then present embodiment the 2. step then do corresponding change
,For example: the upper end presstressed reinforcing steel pushes anchoring after also can adopting and putting anchoring cartridge, and outer then cutting thread forms the stretch-draw anchor end, and attaching nut carries out anchoring stretch-draw, forms anchoring unit, upper end III after stretch-draw finishes.
Claims (8)
1. self-locking prestressed anchor fixing structure; It is characterized in that: this self-locking prestressed anchor fixing structure comprises the built-in fitting (I) and the extruding cable body (II) of isolating construction, and said built-in fitting (I) comprises back protective cover (4), multi-clove type slide block (5), elastic body (7), following anchor plate (8), spiral bar (9) and pre-buried pipe (10); Said extruding cable body (II) comprises guide head (1), anchoring cartridge (2) and presstressed reinforcing steel (3), and presstressed reinforcing steel (3) is by anchoring cartridge (2) anchoring, and there is guide head (1) on its top; Under the user mode; Following anchor plate (8) is combined into one through bolt and back protective cover (4), and is embedded in the precast concrete block (11) with spiral bar (9), pre-buried pipe (10), and extruding cable body (I) has an end of guide head (1) to penetrate from pre-buried pipe (10); Behind multi-clove type slide block (5); Under elastic body (7) effect, multi-clove type slide block (5) is gathered the anchoring cartridge that blocks extruding cable body (II), makes presstressed reinforcing steel (3) thereby can not pastly bounce back to constitute slide block type self-locking prestressed anchor fixing structure.
2. self-locking prestressed anchor fixing structure according to claim 1; It is characterized in that: said multi-clove type slide block (5) is made up of two lobes or many lobes slide block; Lump together and form the cylinder that centre bore is arranged, the top of this centre bore (501) is that bellmouth, bottom are straight hole; Said bellmouth is that cross section is circular round taper hole or is triangular bellmouth, rectangular pyramid shape hole or the p pyramid hole of triangle, quadrangle or p limit shape by the cross section that the inclined-plane with guide effect constitutes; The span of above-mentioned p is: p is the arbitrary integer between the 3-12; The cross-sectional profile of the cylinder that said many lobes slide block is formed is circle, quadrangle, hexagon or n limit shape, and the many lobes that constitute multi-clove type slide block (5) refer to the m lobe, on every sliding lobe of multi-clove type slide block, has to place elastomeric groove; The span of above-mentioned m, n is: m is the arbitrary integer between the 3-12, and n is the arbitrary integer between the 2-36.
3. self-locking prestressed anchor fixing structure according to claim 2; It is characterized in that: described elastic body is spring or elastomer block; The elastomeric groove of on every sliding lobe of multi-clove type slide block, opening of placement is the blind hole of upwards opening in the footpath of every sliding lobe (502), in each blind hole, is placed with a spring or elastomer block.
4. self-locking prestressed anchor fixing structure according to claim 2; It is characterized in that: described elastic body is the cyclic spring hoop (702) that is made into elastomeric material; The elastomeric groove of on every sliding lobe of multi-clove type slide block, opening of placement is at the continuous groove (503) of every sliding lobe along the placement cyclic spring hoop of opening on the outer rim direction (702), and the position and the groove size of the continuous groove (503) on the sliding lobe of each piece are consistent.
5. self-locking prestressed anchor fixing structure according to claim 1; It is characterized in that: the profile of the guide head (1) of said extruding cable body (I) is bullet-headed or conical or cross section is the triangular pyramid bodily form, the rectangular pyramid bodily form of triangle, quadrangle or p limit shape or the p pyramid bodily form that matches with the bellmouth of the centre bore of multi-clove type slide block (5), and P is the arbitrary integer between the 3-12.
6. vertical prestressing anchoring system; Comprise that anchoring has the anchoring unit, lower end and the anchoring unit, upper end (III) of presstressed reinforcing steel one end; Anchoring unit, said upper end (III) comprises and is placed on the stretch-draw end ground tackle that is used for the anchoring presstressed reinforcing steel other end on the anchor plate (12); It is characterized in that: anchoring unit, described lower end is any described self-locking prestress anchoraging element of construction of claim 1-5; Comprise the built-in fitting (I) and the extruding cable body (II) of isolating construction, said built-in fitting (I) comprises back protective cover (4), multi-clove type slide block (5), elastic body (7), following anchor plate (8), spiral bar (9) and pre-buried pipe (10); Said extruding cable body (II) comprises guide head (1), anchoring cartridge (2) and presstressed reinforcing steel (3); Presstressed reinforcing steel (3) is by anchoring cartridge (2) anchoring; There is guide head (1) on its top, and under the user mode, following anchor plate (8) is combined into one through bolt and back protective cover (4); And be embedded in the precast concrete block (11) with spiral bar (9), pre-buried pipe (10); Extruding cable body (II) has an end of guide head (1) to penetrate from pre-buried pipe (10), behind multi-clove type slide block (5), under elastic body (7) effect; Multi-clove type slide block (5) is gathered the anchoring cartridge (2) that blocks extruding cable body (II), makes presstressed reinforcing steel (3) thereby can not pastly bounce back to constitute the anchoring unit, lower end of band slide block type self-locking prestressed anchor fixing structure.
7. a kind of vertical prestressing anchoring system according to claim 6 is characterized in that: described pre-buried pipeline (10) or pre-buried pipe (101) or reserving moulding duct (102) when prefabricated by sections bridge pier, sections column or sections clump constitutes; The cross section of said pre-buried pipeline is circle, rectangle, hexagon or octagon.
8. the job practices of a kind of vertical prestressing anchoring system according to claim 6 is characterized in that: this method may further comprise the steps:
A. built-in fitting (I) is installed:
1. at first with each component-assembled of built-in fitting (I), elastic body (7) is positioned in the back protective cover (4) with multi-clove type slide block (5); To descend anchor plate (8) and back protective cover (4) to be combined into one through bolt (6), and be embedded in the precast concrete block (11) with spiral bar (9), pre-buried pipe (10), this concrete block will be as the anchor block of total; Following anchor plate (8) leaves be in the milk mouthful (17) can draw grout pipe so that the post-grouting sealing is accomplished in stretch-draw;
2. install or make pre-buried pipeline:
Constitute if described pre-buried pipeline is a pre-buried pipe (101), then adopt the construction technology of segmentation welding, concreting in lifts; Along with constantly building of pier shaft increased, it is long that pre-buried pipe (101) also will add welding thereupon; The last pre-buried anchor plate of going up is accomplished pier shaft and is built;
If described pre-buried pipeline (101) adopts by sections bridge pier, sections column or sections clump and reserves moulding duct (102) when prefabricated and constitute, then when prefabricated subsection bridge pier, sections column or sections clump, reserve moulding duct (102) and get final product;
3. go up the pre-buried of anchor plate (12),, then go up anchor plate (12) and connect pre-buried pipe and be embedded in the concrete topmost as adopting the concreting in lifts construction; As adopt segmental precast erection method construction, then go up anchor plate (12) and can imbed in advance in the sections concrete block, with its concrete block as the top layer of section assembling;
B. the vertical prestressing system installs and stretch-draw:
1. cable body (II) is pushed in fabrication and installation: presstressed reinforcing steel (3) is descended the foot length degree and is prefabricated into extruding cable body (II) according to actual requirement of engineering in factory; During construction; To push cable body (II) has an end of guide head (1) to penetrate from the concrete embedded last anchor plate of prefabricated subsection assembly unit, through pre-buried pipeline, when reaching the multi-clove type slide block (5) that contains built-in fitting (I); The guide head (1) of extruding cable body (II) contacts with the conical surface of the multi-clove type slide block (5) of built-in fitting (I); Under the effect of the lateral thrust of guide head (1), each slide block that constitutes multi-clove type slide block (5) scatters to direction radially, and the centre bore of multi-clove type slide block (5) enlarges; After the anchoring cartridge of extruding cable body passes through multi-clove type slide block (5) smoothly; Because the effect of elastic body (7) is gathered multi-clove type slide block (5) and blocked anchoring cartridge (2), make presstressed reinforcing steel (3) thereby can not pastly bounce back to form anchoring unit, lower end;
2. the presstressed reinforcing steel upper end is penetrated stretch-draw end ground tackle, and utilize tensioning equipment and anchor clamps to carry out anchoring stretch-draw, form anchoring unit (III), upper end after stretch-draw finishes;
3. load onto seal closure (16), the sealing of can being in the milk, single presstressed reinforcing steel is arranged and is accomplished
The vertical prestressing anchoring system that single presstressed reinforcing steel constitutes also forms.
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| CN106812063A (en) * | 2015-12-01 | 2017-06-09 | 衡阳市新德力预应力有限公司 | A kind of fixing end p-type anchorage |
| CN108561505A (en) * | 2018-06-22 | 2018-09-21 | 杨维国 | A kind of three valve type cord clip apparatus and its application method considering cable body durability |
| CN109838038A (en) * | 2019-01-11 | 2019-06-04 | 东南大学 | A kind of prestressing force answers material muscle composite anchorage and its forming method |
| CN109853859A (en) * | 2019-01-31 | 2019-06-07 | 上海易拼利联建筑科技有限责任公司 | A kind of ring-like anchoring deviation rod piece connector of elastomeric composition |
| CN110273360A (en) * | 2019-06-15 | 2019-09-24 | 江阴法尔胜住电新材料有限公司 | A kind of self-locking prestress anchorage system and construction method |
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| CN106812063A (en) * | 2015-12-01 | 2017-06-09 | 衡阳市新德力预应力有限公司 | A kind of fixing end p-type anchorage |
| CN108561505A (en) * | 2018-06-22 | 2018-09-21 | 杨维国 | A kind of three valve type cord clip apparatus and its application method considering cable body durability |
| CN109838038A (en) * | 2019-01-11 | 2019-06-04 | 东南大学 | A kind of prestressing force answers material muscle composite anchorage and its forming method |
| CN109838038B (en) * | 2019-01-11 | 2023-12-01 | 东南大学 | Prestressed composite bar composite anchorage and forming method thereof |
| CN109853859A (en) * | 2019-01-31 | 2019-06-07 | 上海易拼利联建筑科技有限责任公司 | A kind of ring-like anchoring deviation rod piece connector of elastomeric composition |
| CN110273360A (en) * | 2019-06-15 | 2019-09-24 | 江阴法尔胜住电新材料有限公司 | A kind of self-locking prestress anchorage system and construction method |
| CN110804941A (en) * | 2019-11-20 | 2020-02-18 | 佛山科学技术学院 | Stay cable stretching anchoring anti-retraction device |
| CN111894146A (en) * | 2020-06-23 | 2020-11-06 | 中铁第一勘察设计院集团有限公司 | Prefabricated wallboard splicing piece of assembled based on interior enlarged pipe socket joint |
| CN113137007A (en) * | 2021-04-27 | 2021-07-20 | 郑亮 | Carbon fiber plate anchorage device |
| 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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