CN111926704A - Assembled parallel steel strand extrusion anchor cable and construction method - Google Patents
Assembled parallel steel strand extrusion anchor cable and construction method Download PDFInfo
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- CN111926704A CN111926704A CN202010955159.4A CN202010955159A CN111926704A CN 111926704 A CN111926704 A CN 111926704A CN 202010955159 A CN202010955159 A CN 202010955159A CN 111926704 A CN111926704 A CN 111926704A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 86
- 239000010959 steel Substances 0.000 title claims abstract description 86
- 238000001125 extrusion Methods 0.000 title claims abstract description 55
- 238000010276 construction Methods 0.000 title claims description 14
- 238000004873 anchoring Methods 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 25
- 230000001681 protective effect Effects 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 6
- 241000446313 Lamella Species 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 6
- 239000010410 layer Substances 0.000 description 4
- 230000008602 contraction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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- 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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- Piles And Underground Anchors (AREA)
Abstract
The assembled parallel steel strand wires extrusion anchor cable sets up the anchor head at the cable both ends, the anchor head includes backing plate, threaded sleeve, the nut, the anchor slab, the pressure-bearing cover, the cable unit prestretches the back, make the extrusion anchor on the anchor unit surpass the anchor slab by the certain distance, the lock installs the pressure-bearing cover of two lamellas, put and open and roll back, make the little cylinder of pressure-bearing cover get into the anchor slab downthehole, big cylinder bears the weight of the transmission of the power between extrusion anchor and the anchor slab, reach the purpose of a unit anchor, after all unit installations, whole stretch-draw cable, the threaded sleeve is followed up, screw the nut reaches the purpose of whole stretch-draw anchor. When the cable needs to be replaced, the large nut is firstly loosened after the whole is tensioned, and then the single tensioning is carried out to remove the bearing sleeve, so that the cable unit can be withdrawn singly for replacement. The pre-buried pipe has the function of forming a through hole, so that the pre-buried pipe is convenient to install; the whole cable is formed by installing and tensioning a plurality of cable units one by one and finally integrally tensioning the cable units.
Description
Technical Field
The invention relates to a stay cable and a construction method, in particular to an assembled parallel steel strand extrusion anchor stay cable and a construction method.
Background
The stay cable is a prestressed steel bundle erected between two anchor ingots in bridge engineering, and the steel bundle is formed by combining a plurality of prestressed tendons and is called as the stay cable.
The stay cable is widely applied in bridge construction engineering, is a necessary choice for large-span bridges, and cannot be constructed without the stay cable. The cable is mostly the low stress cable in the engineering, and the maximum pulling force is 45% of breaking strength, and the more having chill casting anchor cable, whole extrusion cable and clip formula cable of current application, in large-scale engineering, because the restriction of weight and radical, two kinds of integral cables all have their limitations before, and the clip formula cable though can break up the whole into parts, convenient construction, but its low stress security also lets people worry always, needs the parallel steel strand wires cable of a stable and convenient construction of anchor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an assembled parallel steel strand extrusion anchor cable which can be installed dispersedly and is replaceable and the cost is reduced and a construction method.
The invention is realized by the following technical scheme: the utility model provides an assembled parallel steel strand wires extrusion anchor cable, includes the backing plate, the backing plate intermediate position is provided with the screw sleeve, the screw sleeve left end is provided with the anchor slab, be provided with the through-hole that is used for passing the cable unit on the anchor slab, the through-hole left end is provided with the anchor device dismantled that is used for anchoring the cable unit, the backing plate left side is provided with the whole anchor device that is used for adjusting the distance between screw sleeve and the backing plate.
Furthermore, a pre-buried pipe is arranged at the position, corresponding to the sleeve, of the right side of the base plate.
Furthermore, a sealing sleeve used for sealing the steel strand is arranged at the right end of the embedded pipe.
Furthermore, the right end of the threaded sleeve is connected with a rightward extending cylinder, the right end of the threaded sleeve is arranged in the embedded pipe in a penetrating mode, the extending cylinder extends rightwards to extend out of the embedded pipe, and the sealing sleeve is arranged at the joint of the embedded pipe and the extending cylinder.
Furthermore, an oil filling hole is formed in the lower portion of the left end of the threaded sleeve, and an exhaust hole is formed in the upper portion of the left end of the threaded sleeve.
Further, the threaded sleeve is a trapezoidal thread, and the integral anchoring device is a nut sleeved outside the threaded sleeve.
Furthermore, the detachable anchoring device comprises a first extrusion anchor for anchoring the steel strand, and a detachable pressure bearing sleeve is arranged between the first extrusion anchor and the through hole.
Furthermore, the left end of the pressure bearing sleeve is tightly propped against the extrusion anchor, and the right end of the pressure bearing sleeve is tightly propped against the anchor plate.
Further, a protective cover used for protecting the end part of the steel strand is arranged on the left side of the base plate.
A construction method for an assembled parallel steel strand extruded anchor cable comprises the following steps:
firstly, prefabricating a base plate and a pre-buried pipe into a concrete structure; the pre-installed threaded sleeve, the extension cylinder, the anchor plate, the pressure bearing sleeve, the nut, the sealing sleeve and the like;
secondly, pre-tightening the end part of the steel strand on a fixed-length anchoring extruder, and then fixing an extrusion anchor I on the end part of the steel strand to obtain the steel strand of the fixed-length anchoring extrusion anchor, which is also called a guy cable unit;
thirdly, the prefabricated inhaul cable unit sequentially penetrates through the sealing sleeve, the extension cylinder, the threaded sleeve and the anchor plate leftwards, the inhaul cable unit is pulled until the extrusion anchor extends leftwards to the outside of the anchor plate, the right end of the inhaul cable unit is automatically fixed on the anchor plate at the right end, the bearing sleeve is installed, and after the whole body is tensioned, the nut is screwed to enable the extrusion anchor, the bearing sleeve and the anchor plate to be tightly pressed, so that the whole body is anchored;
step four, injecting oil into the inner cavities of the threaded sleeve and the extension cylinder, and then sealing;
and fifthly, installing a protective cover on the left side of the backing plate, wrapping the left end of the prefabricated steel strand by the protective cover, injecting oil into the protective cover, sealing, and completing installation, tensioning and protection of the assembled parallel steel strand extrusion anchor cable.
And step six, when the cable needs to be replaced, the protective cover is detached, the cable is integrally tensioned leftwards, the nut is unscrewed to firstly remove the force of the whole cable, then the single cable unit is tensioned, the bearing sleeve is detached, and the cable unit can be further detached to replace the cable.
The invention has the beneficial effects that: the assembled parallel steel strand wires extrusion anchor cable sets up the anchor head at the cable both ends, the anchor head includes backing plate, threaded sleeve, the nut, the anchor slab, the pressure-bearing cover, the cable unit prestretches the back, make the extrusion anchor on the anchor unit surpass the anchor slab by the certain distance, the lock installs the pressure-bearing cover of two lamellas, put and open and roll back, make the little cylinder of pressure-bearing cover get into the anchor slab downthehole, big cylinder bears the weight of the transmission of the power between extrusion anchor and the anchor slab, reach the purpose of a unit anchor, after all unit installations, whole stretch-draw cable, the threaded sleeve is followed up, screw the nut reaches the purpose of whole stretch-draw anchor. When the cable needs to be replaced, the large nut is firstly loosened after the whole is tensioned, and then the single tensioning is carried out to remove the bearing sleeve, so that the cable unit can be withdrawn singly for replacement. The pre-buried pipe has the function of forming a through hole, so that the pre-buried pipe is convenient to install; the whole cable is formed by installing and tensioning a plurality of cable units one by one and finally integrally tensioning the cable units.
Drawings
FIG. 1 is a schematic front sectional view of example 1;
FIG. 2 is a schematic view showing the connection relationship between the anchor plate, the sleeve, the backing plate and the extension cylinder;
FIG. 3 is a schematic view of a pressure-containing jacket structure;
FIG. 4 is a schematic view of the sealing sleeve in connection with the extension sleeve;
FIG. 5 is a schematic view of the connection between the pre-tightening cylinder and the anchoring head during installation;
FIG. 6 is a schematic top sectional view of the fixed length steel strand extruder;
FIG. 7 is a sectional view of the support base;
FIG. 8 is a schematic cross-sectional view of the right end of the second cylinder;
wherein: 1-steel strand, 2-shield, 3-oil hole, 4-exhaust hole, 5-extrusion anchor I, 6-pressure bearing sleeve, 601-top block, 602-guide head, 603-groove, 7-sleeve, 8-anchor plate, 9-nut, 10-backing plate, 11-extension cylinder, 12-embedded pipe, 13-sealing sleeve, 14-tying device, 15-elastic layer, 16-supporting foot, 17-pre-tightening oil cylinder, 18-tool anchor plate, 19-clamping piece, 201-reaction plate, 202-stud, 203-bottom plate I, 204-bottom plate II, 205-pressure bearing seat, 206-extrusion anchor II, 207-left top pressure head, 208-oil cylinder I, 209-oil cylinder II, 210-connecting sleeve, 211-forming die, 212-jackscrew, 213-return spring, 214-second top, 215-shrink sleeve, 216-top ring, 217-first clip, 218-spring sleeve, 219-first top.
Detailed Description
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-8, an assembled parallel steel strand pull extrusion anchor cable; the cable comprises a cable body and an anchor head, wherein the cable body comprises a plurality of cable units, each cable unit comprises a steel strand and an extrusion anchor anchored at a fixed length, each anchor head comprises a base plate 10, each base plate is a steel plate and has high structural strength, a threaded sleeve 7 is arranged in the middle of each base plate, each threaded sleeve is a cylinder, trapezoidal threads are machined on the outer wall of each sleeve, each threaded sleeve is arranged in the middle of each base plate in a clearance fit mode, an integral anchoring device used for adjusting the distance between each threaded sleeve and each base plate is arranged on the left side of each base plate, each integral anchoring device is a nut 9, each nut is sleeved outside each threaded sleeve, each nut is a round nut, a tool groove used for rotating each nut is machined on the outer wall of each nut, the distance between each sleeve and each base plate can be adjusted by screwing each nut, an anchor plate 8 is arranged at the left end of each threaded sleeve, each anchor plate is a steel, the steps are matched with the inner wall of the threaded sleeve in tolerance and are convenient to position, through holes for penetrating through the steel strand 1 are regularly distributed on the anchor plate, in order to facilitate the insertion of the steel strand, the right end opening of the through hole is provided with a large chamfer angle, the left end of the through hole is provided with a detachable anchoring device for anchoring a cable unit, the detachable anchoring device comprises an extrusion anchor I5 for anchoring the steel strand, the extrusion anchor I is in a circular tube shape and can penetrate through the through hole, the extrusion anchor I is fixed on the steel strand, a detachable pressure bearing sleeve 6 is arranged between the extrusion anchor I and the through hole and is formed by buckling two pieces for convenient installation, the pressure bearing sleeve comprises a pressure bearing sleeve jacking block 601 for tightly propping against the extrusion anchor I and the anchor plate, the jacking block is integrally formed with a guide head 602 capable of being inserted into the through hole, the outer side of the right end of the guide head is chamfered, the guide head is in clearance fit with the through hole, the C-shaped spring is arranged in the groove, so that the two petals can be buckled and then sleeved on the steel strand to prevent the steel strand from falling off in the installation process, and the anchor plate and the pressure bearing sleeve are both subjected to high-frequency quenching treatment and have higher surface hardness.
The embedded pipe 12 is installed on the right side of the base plate and corresponds to the threaded sleeve, the embedded pipe is sleeved outside the sleeve in a coaxial mode, the left end of the embedded pipe is tightly propped against the base plate, the right end of the sleeve is connected with the rightward extension cylinder 11 in a coaxial mode, the male and female heads at the left end of the extension cylinder are matched and inserted into the sleeve, the embedded pipe is convenient to install, the extension cylinder extends rightward to the right side of the embedded pipe, the right end of the embedded pipe is sleeved with the sealing sleeve 13 used for sealing with a steel strand, the sealing sleeve is arranged between the joint of the embedded pipe and the extension cylinder, and the sealing sleeve is made of a heat shrink.
Install the guard shield 2 that is used for protecting steel strand wires tip on the left of the backing plate, the steel strand wires left end is located the guard shield, the go-between is installed to guard shield right-hand member outer fringe, the guard shield passes through the go-between and the bolt is connected with the backing plate, easy to assemble, oil filler point 3 has all been processed to the left end lower part of screw sleeve left end lower part and guard shield, exhaust hole 4 has all been processed to the left end upper portion of screw sleeve left end upper portion and guard shield, conveniently pour into anticorrosive grease into, and then carry out anticorrosion protection to steel strand wires and anchor head, and service life is prolonged, conveniently dismantle when changing simultaneously, when detecting that there is anticorrosive grease to discharge in exhaust hole department, prove that the oiling is accomplished.
The anchoring structures at the two ends of the inhaul cable are the same, and unified manufacturing is facilitated.
The construction method of the assembled parallel steel strand extruded anchor cable provided by the embodiment is as follows:
firstly, prefabricating a base plate and a pre-buried pipe in a concrete member; a pre-installed sleeve, an extension cylinder, an anchor plate, a pressure bearing sleeve, a nut, a sealing sleeve and the like,
and step two, manufacturing a inhaul cable unit in fixed-length anchoring extruder equipment. Firstly, anchoring one end of a steel strand by using an extrusion anchor, then, pre-tightening the other end of the steel strand after penetrating through a device, and extruding, anchoring and extruding the first anchor to obtain a prefabricated steel strand anchored at a fixed length, namely a guy cable unit;
and step three, enabling the prefabricated inhaul cable unit to pass through the sealing sleeve, the extension cylinder, the threaded sleeve and the anchor plate leftwards in sequence. The single cable is pre-tensioned until the extrusion anchor extends out of the anchor plate to the left, a bearing sleeve is installed, the cable is retracted and anchored, after all the cable units are installed, the cable is integrally tensioned, and nuts are screwed down to tightly press the extrusion anchor, the bearing sleeve and the anchor plate, so that the purpose of integral anchoring is achieved;
injecting oil into the sleeve and the extension cylinder, and then sealing;
and fifthly, installing a protective cover on the left side of the backing plate, wrapping the left end of the prefabricated steel strand by the protective cover, injecting oil into the protective cover, sealing, extruding the anchor cable by the assembled parallel steel strand, and tensioning and installing.
Step six, in the later stage, if a problem is found, when the cable needs to be replaced, the protective cover is detached, the cable is integrally tensioned leftwards, the nut is unscrewed and retreats, the integral force is initially removed, then a single cable unit is detached through single tensioning, and a new cable is replaced; in the second step, the manufacturing of the inhaul cable unit comprises the following steps,
a, calculating a blanking length value of the steel strand, and intercepting the steel strand, wherein the length value of the steel strand is greater than the sum of an anchoring distance value L0 and a pre-tightening operation length value Ld;
b, if the steel strand is an unbonded steel strand, the protective layers at the two end parts of the steel strand need to be stripped, the first end is stripped to a length value larger than Ld, the second extrusion anchor 206 is fixed at the second end, and one end of the second extrusion anchor is firstly extruded;
c, placing the prefabricated steel strand on a fixed-length anchoring extruder, pre-tightening, and then fixing an extrusion anchor I at a first end, wherein the distance between the extrusion anchor I and the extrusion anchor II is L0;
in the step C, the fixed-length anchoring extruder comprises a reaction frame, an opening for penetrating a steel strand is arranged on the reaction frame, an extruder for extruding and extruding a first anchor is arranged on the left side of the reaction frame, the extruder is a feed-through extruder, the extruder comprises a supporting seat, the right end of the supporting seat is tightly propped against the reaction frame, a forming die 211 for shrinking and extruding the anchor is arranged on the right end of the supporting seat, for the convenience of maintenance, the supporting seat comprises a first bottom plate 203 and a second bottom plate 204 which are parallel to each other, the first bottom plate and the second bottom plate are connected through a stud 202, the distance is convenient to adjust, the forming die is arranged on the first bottom plate through a die holder, the die holder comprises a connecting sleeve 210 connected with the first bottom plate, the inner cavity of the connecting sleeve is cylindrical, a cylindrical bearing seat 205 is arranged in the connecting sleeve in a penetrating manner, a, a plurality of jackscrews 212 for adjusting the position of the bearing seat are uniformly arranged on the connecting sleeve, a first oil cylinder 208 is arranged on the second bottom plate, a piston rod of the first oil cylinder is connected with a first jacking head 219, a left jacking head 207 is arranged in the first jacking head, a first extrusion anchor is arranged on the right side of the left jacking head, the left jacking head is detachably sleeved on a steel strand, the left jacking head is cylindrical and is made of tool steel materials, the right end of the left jacking head is processed into a rightward circular platform-shaped boss, the left end of a forming die is processed with a conical hole matched with the boss, the right end of the conical hole is coaxially communicated with a cylindrical die cavity, the first extrusion anchor can be completely pushed into the die cavity through the left jacking head, an extrusion die which is extruded is pushed out of the die cavity rightwards, extrusion is completed, a second oil cylinder 209 is coaxially arranged at the left end of the first oil cylinder, the first oil cylinder and the second oil cylinder are both straight-through jacks, a piston, the left end of the inner cylinder of the second oil cylinder is connected with a clamping sleeve for clamping a steel strand, the clamping sleeve comprises a first clamping piece 217 installed at the right end of the second oil cylinder, a contraction sleeve 215 used for enabling the first clamping piece to contract is further installed at the right end of the second oil cylinder, a tapered hole matched with the first clamping piece is formed in the left end of the contraction sleeve, the first clamping piece and the first clamping piece are both three-piece clamping pieces, a reset spring 213 used for pushing the first clamping piece to move towards the contraction sleeve is further installed at the right end of the second oil cylinder, for convenience in use, the left end of the reset spring is tightly propped against the second oil cylinder, the right end of the reset spring is connected with a spring sleeve 218, the first clamping piece can be stressed more uniformly through the spring sleeve, the first clamping piece and the steel strand are further stably clamped, and a jacking ring 216 used for.
For further improvement work efficiency, the reaction frame is composed of two reaction plates 201 which are parallel to each other, the distance between the two reaction plates is adjusted according to the length of L0, strip-shaped openings matched with the steel strands are processed on the two reaction plates, and the strip-shaped openings extend to the upper edges of the reaction plates.
The fixed-length anchoring extruder has the working principle that a steel strand to be pre-tightened is placed on the fixed-length anchoring extruder, an extrusion anchor II is clamped on the right side of a reaction frame, the steel strand sequentially penetrates through a supporting seat, an oil cylinder I and an oil cylinder II to the left, the oil cylinder II is started, an inner cylinder and an outer cylinder of the oil cylinder II move to the left, a shrinking sleeve moves to the left, a reset spring pushes a clamping piece I and the shrinking sleeve to move relatively until the clamping piece I and the steel strand are clamped tightly, the oil cylinder II continues to act to pre-tighten the steel strand, the pre-tightening force can be controlled by controlling the oil pressure of the oil cylinder II to ensure the pre-tightening effect of the steel strand, the steel strand with the required length is obtained by cutting the left side of the oil cylinder II according to needs, after the pre-tightening is completed, the oil cylinder I acts to push the extrusion anchor I to the right, the extrusion anchor, in the process that the second oil cylinder resets, the first clamping piece moves to the right and is propped against the top ring, the first clamping piece cannot move continuously, the tightening sleeve continues to move to the right, the first clamping piece is opened, the prefabricated steel strand is obtained by taking out the first clamping piece, the steps are simple, the steel strand with the fixed length can be quickly obtained, the installation of the assembly type parallel steel strand extrusion anchor cable in a matched mode is convenient, in the working process, the upper limit of oil pressure of the second oil cylinder is controlled through the overflow valve, the pre-tightening force of the steel strand is further controlled, in the extrusion process, the piston rod of the second oil cylinder can be further guaranteed to move along with the steel strand, the stress of the steel.
In the integral tensioning of the third step, the stay cable is tensioned leftwards, the tensioning is carried out through a tensioning device, the tensioning device comprises a supporting foot 16 used for being tightly propped against the base plate, a tensioning cylinder 17 is installed at the left end of the supporting foot, the tensioning cylinder is a penetrating jack, a piston rod of the tensioning cylinder is connected with a tool anchor plate 18 leftwards and tightly propped, a hole matched with the steel strand is machined in the tool anchor plate, the left end of the hole is a conical hole and used for being matched with a clamping piece 19 to clamp the steel strand, the tensioning cylinder works, the steel strand is clamped through the clamping piece and then is enabled to move leftwards, the extrusion anchor moves leftwards, the first extrusion anchor, the pressure bearing sleeve and the anchor plate tend to loosen, and the tensioning anchor plate is tensioned.
Before integral tensioning in the third step, the sealing sleeve is sleeved, the mouth bundling device 14 bundles the steel strand bundle at the right side of the extension cylinder, the mouth bundling device is composed of two pieces and is fastened and contracted through bolts, the elastic layer 15 made of rubber is arranged in the cavity, rigid contact is avoided, the mouth bundling is uniform, and the mouth bundling effect is improved; after tensioning is finished, the heat shrinkable tube is blown by hot air to shrink and seal the heat shrinkable tube, so that the waterproof effect is achieved.
When the whole unloading is not enough, the single screw-separating disc is added outside the supporting foot, the single front clamping jack is used for stretching after pre-extending for a certain stroke, when the extrusion anchor is pulled out for a distance greater than the height of the pressure bearing sleeve, the pressure bearing sleeve is taken out, the anchoring is released, the jack is played back, the internal stress is completely eliminated, if the internal stress can not be completely eliminated in one stroke, the front clamping jack with large stroke can be used instead, or the open anchor ring is used for relay anchoring, the inverted top unloading is carried out, and the operation is convenient.
The steel strand wires of cable unit are for not having bonding steel strand wires, and the protective layer is the PE layer, and PE layer parcel carbon cloth outward can effectual increase toughness, improve ageing resistance, and then improve life.
The assembled parallel steel strand extruded anchor stay cable parallel steel strand stay cable and the construction method provided by the invention have the advantages that the operation is convenient, the anchoring is reliable, the stress is uniform, the anchoring quality can be ensured, particularly for a large-scale suspension bridge, the whole cable weight is very large, the hoisting and erection are very difficult, the whole part can be broken into parts by adopting a plurality of assembling forms, and the construction is greatly convenient.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides an assembled parallel steel strand wires extrusion anchor cable, a serial communication port, including the cable body and anchor head, the cable body comprises the cable unit, and the cable unit comprises steel strand wires and fixed length anchor's extrusion anchor, and the anchor head includes the backing plate, the backing plate intermediate position is provided with the screw sleeve, the screw sleeve left end is provided with the anchor board, be provided with the through-hole that is used for passing the cable unit on the anchor board, the through-hole left end is provided with the anchor device of dismantling that is used for anchor cable unit, the backing plate left side is provided with the whole anchor device that is used for adjusting distance between screw sleeve and the backing plate.
2. The fabricated parallel strand extruded anchor cable of claim 1, wherein a pre-buried pipe is provided at a position on the right side of the pad plate corresponding to the threaded sleeve.
3. The fabricated parallel steel strand extruded anchor cable of claim 2, wherein a sealing sleeve for sealing with the steel strand is arranged at the right end of the embedded pipe.
4. The assembly type parallel steel strand extrusion anchor cable according to claim 3, wherein a rightward extension cylinder is connected to the right end of the threaded sleeve, the right end of the threaded sleeve is arranged in the embedded pipe in a penetrating mode, the extension cylinder extends rightward to the right side of the embedded pipe, and the sealing sleeve spans between joints of the embedded pipe and the extension cylinder.
5. The fabricated parallel strand extruded anchor cable of claim 4, wherein an oil hole is provided at a lower portion of the left end of the sleeve, and an air vent is provided at an upper portion of the left end of the sleeve.
6. The fabricated parallel steel strand extruded anchor cable of claim 1, wherein the threaded sleeve is a trapezoidal thread and the integral anchoring device is a nut that fits over the threaded sleeve.
7. The fabricated parallel steel strand extruded anchor cable of claim 1, wherein the detachable anchoring device comprises a first extruded anchor for clamping the steel strand, and a detachable pressure bearing sleeve is arranged between the first extruded anchor and the through hole.
8. The fabricated parallel steel strand extruded anchor cable of claim 7, wherein the left end of the bearing sleeve abuts against the first extruded anchor, and the right end of the bearing sleeve abuts against the anchor plate.
9. The fabricated parallel strand extruded anchor cable of claim 1, wherein a protective cover for protecting the ends of the strands is provided to the left of the bolster plate.
10. A construction method for an assembled parallel steel strand extruded anchor cable is characterized by comprising the following steps,
firstly, prefabricating a base plate and an embedded pipe in a concrete structure; the device comprises a preassembled sleeve, an extension cylinder, an anchor plate, a pressure-bearing sleeve, a nut and a sealing sleeve;
pre-tightening the end part of the steel strand, and then fixing an extrusion anchor I at the end part of the steel strand to obtain a prefabricated inhaul cable unit;
thirdly, the prefabricated inhaul cable unit sequentially penetrates through the sealing sleeve, the extension cylinder, the threaded sleeve and the anchor plate leftwards, a single prefabricated inhaul cable unit is pre-tensioned to the extrusion anchor and extends leftwards to the outside of the anchor plate, the right end of the prefabricated inhaul cable unit is automatically anchored on the anchor plate at the right end, a pressure bearing sleeve is installed, pre-tensioning force is retracted, and the pressure bearing sleeve is clamped in the through hole to form unit anchoring;
step four, adding a supporting foot and a jack, integrally stretching the inhaul cable leftwards, screwing a nut to tightly press the extrusion anchor I, the pressure-bearing sleeve and the anchor plate without loosening, further screwing the nut after stretching is finished, and retreating the jack to form integral anchoring;
injecting oil into the sleeve and the extension cylinder, and then sealing;
and step six, installing a protective cover on the left side of the base plate, wrapping the left end of the steel strand by the protective cover, injecting oil into the protective cover, sealing, and finishing construction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010955159.4A CN111926704A (en) | 2020-09-11 | 2020-09-11 | Assembled parallel steel strand extrusion anchor cable and construction method |
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| CN202010955159.4A CN111926704A (en) | 2020-09-11 | 2020-09-11 | Assembled parallel steel strand extrusion anchor cable and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114059449A (en) * | 2021-12-03 | 2022-02-18 | 柳州欧维姆机械股份有限公司 | Pipe orifice sealing structure and method for parallel steel strand inhaul cable embedded pipe |
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