CN110725547A - Compact steel strand inhaul cable and manufacturing method thereof - Google Patents
Compact steel strand inhaul cable and manufacturing method thereof Download PDFInfo
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- CN110725547A CN110725547A CN201910988502.2A CN201910988502A CN110725547A CN 110725547 A CN110725547 A CN 110725547A CN 201910988502 A CN201910988502 A CN 201910988502A CN 110725547 A CN110725547 A CN 110725547A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention provides a compact steel strand inhaul cable and a manufacturing method thereof, wherein the compact steel strand inhaul cable comprises the following steps: the cable body that constitutes by the prestressing tendons to and wear anchor end and the sealed end of cover on the cable body, anchor end and sealed end fixed connection, the prestressing tendons of the cable body and the tip rigid coupling of anchor end, its characterized in that, the anchor end includes: the anchor comprises an end cover, an annular anchor plate, an isolation sleeve and an anchor cup; according to the compact steel strand stay cable and the manufacturing method thereof provided by the invention, the appearance of the stay cable anchor cup is very compact, the inner cavity of the stay cable anchor cup is made to be as large as the enveloping circle of the prestressed tendon of the stay cable, the contact area of the inner cavity is increased by arranging the multi-stage partial pressure wedge in the inner cavity of the anchor cup, and the cold-cast bond coating material is filled in the anchor cup and is solidified at high temperature to anchor the prestressed tendon, so that the process problem that the existing extrusion type stay cable needs to manufacture an anchor head through extrusion equipment is solved.
Description
Technical Field
The invention belongs to the technical field of steel strands, and particularly relates to a compact steel strand inhaul cable and a manufacturing method thereof.
Background
The existing compact steel strand stay cable and the manufacturing method thereof have the advantages that the most compact anchor head of the stay cable is the whole bundle of extrusion type stay cable, corresponding prestressed rib holes are processed in an anchor spindle sleeve, the arrangement of the prestressed rib holes on the anchor spindle sleeve is basically the same as that of prestressed ribs on a cable body, and the prestressed ribs do not have divergence angles, so that the size of the anchor spindle sleeve can be made very compact. And (3) after the prestressed tendon passes through the corresponding hole, extruding the anchor ingot sleeve by large-scale extrusion equipment to form, and realizing the anchoring of the prestressed tendon through cold extrusion deformation. And (4) threading teeth outside the anchor ingot sleeve after extrusion is finished, and finally performing surface corrosion prevention on the anchor ingot sleeve. The finished cable is difficult to perform surface corrosion prevention, and the method is limited by extrusion equipment, so that the specification of the cable can only reach 37 holes (steel strands) at most.
The invention patent application of the publication number CN106320609A discloses a steel strand inhaul cable and a manufacturing method thereof, comprising a cable body formed by a plurality of steel strands, and an anchoring end and a tensioning end which are connected with the end part of the cable body, and the steel strand inhaul cable is characterized in that the anchoring end and the tensioning end respectively comprise a taper sleeve sleeved on the end part of a central steel wire of each steel strand, an anchoring sleeve sleeved on the end part of the cable body and a sealing barrel connected with the anchoring sleeve, wherein epoxy cold casting materials are filled in the anchoring sleeve, anti-corrosion materials are filled in the sealing barrel, and an end cover is sealed at the end part of the anchoring sleeve.
It can be seen that in the steel strand inhaul cable and the manufacturing method in the prior art, the taper sleeve is placed at the end part of the central steel wire of each steel strand, so that the end part of each steel strand is expanded, the method can only expand the section part of each steel strand, and the length of the steel strand in the anchoring section is long, the expansion mode is limited, and the steel strand cable bodies far away from the end parts are possibly attached without gaps, so that the prestressed reinforcement steel strands cannot be fully wrapped by the cold casting bonding material in the grouting process, and the stress of the prestressed reinforcement is uneven. In the process of cable making and grouting, the cable body cannot be completely vertical when being hoisted for a long time, the prestressed tendons of the cable body are not aligned with the anchor cup, and the danger that the prestressed tendons of the cable body slip from the anchor cup due to the fact that part of the prestressed tendons are not wrapped by cold-cast wrapping materials is caused.
Disclosure of Invention
The invention aims to provide a compact steel strand inhaul cable and a manufacturing method thereof, and aims to solve the problems that in the prior art, the cable force prestressed tendons are not uniformly stressed, and the cable body prestressed tendons are not aligned with an anchor cup.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
the invention provides a compact steel strand inhaul cable, which comprises: the cable body that constitutes by the prestressing tendons to and wear anchor end and the sealed end of cover on the cable body, anchor end and sealed end fixed connection, the prestressing tendons of the cable body and the tip rigid coupling of anchor end, the anchor end includes: the anchor comprises an end cover, an annular anchor plate, an isolation sleeve and an anchor cup, wherein one end of the anchor cup is opened, the other end of the anchor cup is provided with the end cover fixedly connected with the prestressed tendon, the annular anchor plate is sleeved on the prestressed tendon in a penetrating mode and wedged into the inner surface of the anchor cup, and the isolation sleeve is arranged on the outer surface of the prestressed tendon.
Preferably, the sealing end comprises: the cable comprises a restraint ring, a sealing cylinder, a sealing ring, a compression ring and a heat-shrinkable sleeve, wherein the sealing cylinder is provided with openings at two ends, the restraint ring is arranged at the joint of the sealing cylinder and an anchoring end, the heat-shrinkable sleeve is sleeved on a cable body in a penetrating manner and is fixedly connected with the outer surface of the sealing cylinder, the compression ring is arranged at the joint of the sealing cylinder and the heat-shrinkable sleeve, and the sealing ring is sleeved on the cable body in a penetrating manner and is fixedly connected with the inner surface of the sealing cylinder.
Preferably, the prestressed tendons are steel strands and/or steel wires.
Preferably, the structure of the isolation sleeve is a hollow cylinder with a slope on the outer surface or a hollow cube or a hollow cylinder with a sawtooth-shaped outer surface.
Preferably, the shape of the opening in the anchor cup is formed by more than 1 wedge.
The invention also provides a manufacturing method of the compact steel strand inhaul cable, which comprises the following steps:
step 1: manufacturing the prestressed tendons into a cable body, stripping an outer ring PE layer of the cable body according to the anchoring length, and cleaning the prestressed tendons exposed after the PE layer of the cable body is stripped;
step 2: manufacturing an anchoring end, installing an annular anchor plate, and sleeving the annular anchor plate on the prestressed tendon at the outermost ring of the cable body in a penetrating manner; mounting an isolation sleeve, and sleeving the isolation sleeve on the prestressed tendons at the middle position of the cable body in a penetrating manner, wherein the isolation sleeve is arranged on the prestressed tendons in a stepped spiral manner, and the isolation sleeves on the prestressed tendons are not mutually contacted;
and step 3: pouring and solidifying, namely placing an annular anchor plate and a prestressed tendon into an anchor cup, fixedly connecting an end cover with the anchor cup, mounting the annular anchor plate on the end cover, rotationally fastening a grouting tool pressing plate and the outer surface of the anchor cup, adopting an inner hexagon screw to compress the end cover, mounting an outer hexagon bolt to vertically place the anchor cup, filling the inner cavity of the anchor cup with a cold-cast bonding material, and adopting a vibrator to vibrate to enable the cold-cast bonding material to be more compact;
and 4, step 4: after the pouring is finished, a restraint ring is installed, the anchoring end is placed in a high-temperature curing furnace for constant-temperature curing, the cold-cast bond material is cured to form wedge-shaped bond force, so that the anchoring effect is achieved, and the end cover and the grouting tool pressing plate are rotated and twisted out after the curing is finished;
and 5: the first pretensioning makes the prestressed tendons in the cable body stressed uniformly, eliminates the gaps among the prestressed tendons and makes the elastic modulus of the cable body stable;
step 6: vertically placing an anchor head, screwing a sealing cylinder at a sealing end and an anchor cup at an anchoring end in a threaded fit manner, filling a sealing filling material into an inner cavity of the sealing cylinder, then installing a sealing ring and a compression ring on the sealing cylinder, and vertically standing until the sealing filling material is cured;
and 7: and (3) performing second pre-tensioning, loading according to 40% of the nominal force of the cable body, keeping the load for 10-30 minutes, eliminating a gap between a prestressed tendon in the cable body and a cold-cast bond wrapping material in the sealing end, twisting the cover plate in place, and installing a heat-shrinkable sleeve at the transition section of the cable body and the sealing end.
Preferably, the prestressed tendons are steel strands and/or steel wires.
Preferably, when the prestressed tendons are steel strands, pier head treatment is carried out on central steel wires of the steel strands, and the annular anchor plates and the prestressed tendons are temporarily anchored; when the prestressed tendons are steel wires, the steel wires uniformly distributed in the steel wires penetrating through the annular anchor plate are randomly selected for pier head treatment, so that temporary anchoring of the prestressed tendons and the annular anchor plate is realized; when the prestressed tendons are a complex of steel strands and steel wires, only the steel wires in the prestressed tendons penetrating through the annular anchor plate are subjected to pier head treatment, and temporary anchoring of the composite prestressed tendons and the annular anchor plate is achieved.
The invention has the advantages that:
the compact steel strand stay cable and the manufacturing method thereof provided by the invention have the advantages that the stay cable anchor cup is very compact in appearance, the inner cavity of the stay cable anchor cup is made to be as large as the enveloping circle of the prestressed tendon of the stay cable, the contact area of the inner cavity is increased by arranging the multi-stage partial pressure wedge in the inner cavity of the anchor cup, and the prestressed tendon is anchored by filling the cold-cast bonding material into the anchor cup and solidifying the cold-cast bonding material at high temperature. The technical problem that the existing extrusion type inhaul cable needs to be provided with the anchor head through extrusion equipment is solved.
Drawings
FIG. 1 is a schematic structural view of a compact steel strand stay cable according to the present invention;
FIG. 2 is a schematic side view of an anchoring end according to the present invention;
FIG. 3 is a schematic side view of the seal end of the present invention;
FIG. 4a is a schematic side view of a cable according to an embodiment of the present invention;
FIG. 4b is a cross-sectional view of a cable body according to an embodiment of the present invention;
FIG. 5a is a schematic side view of a cable body according to another embodiment of the present invention;
FIG. 5b is a cross-sectional view of a cable body according to yet another embodiment of the present invention;
FIG. 6a is a schematic side view of a cable body according to another embodiment of the present invention;
FIG. 6b is a cross-sectional view of a cable body according to yet another embodiment of the present invention;
FIG. 7 is a side view of the anchor cup of the present invention;
FIG. 8 is a schematic structural view of an annular anchor plate according to the present invention;
FIG. 9a is a schematic view of the construction of a spacer sleeve according to an embodiment of the present invention;
FIG. 9b is a schematic view of the construction of a spacer sleeve according to yet another embodiment of the present invention;
FIG. 9c is a schematic view of the construction of a spacer sleeve according to yet another embodiment of the present invention;
FIG. 10 is a schematic view of the anchor cup installation during the casting curing step of the present invention;
FIG. 11 is a schematic structural view of an end cap according to the present invention;
fig. 12 is a schematic structural view of a grouting tool pressing plate according to the present invention.
In the figure, 100 is a cable body, 102 is a prestressed tendon, 103a is a steel strand, 103b is a steel wire, 200 is an anchoring end, 201 is an end cover, 202 is an annular anchor plate, 203 is an isolation sleeve, 204 is an anchor cup, 205 is a cold-cast bond wrapping material, 206 is a wedge, 207 is a grouting tool pressing plate, 208 is an inner hexagon screw, 209 is an outer hexagon bolt, 300 is a sealing end, 301 is a restraining ring, 302 is a sealing cylinder, 303 is a sealing filling material, 304 is a sealing ring, 305 is a compression ring, and 306 is a heat-shrinkable sleeve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a compact steel strand inhaul cable, as shown in figure 1, comprising: the cable body 100 formed by the prestressed tendons 102, and the anchoring end 200 and the sealing end 300 are sleeved on the cable body 100, the anchoring end 200 and the sealing end 300 are fixedly connected, as shown in fig. 2, the prestressed tendons 102 of the cable body 100 are fixedly connected with the end of the anchoring end 200, and the anchoring end 200 comprises: the structure comprises an end cover 201, an annular anchor plate 202, an isolation sleeve 203 and an anchor cup 204, wherein one end of the anchor cup 204 is open, the end cover 201 fixedly connected with the prestressed tendon 102 is arranged at the other end of the anchor cup 204, the annular anchor plate 202 penetrates through the prestressed tendon 102 and is wedged into the inner surface of the anchor cup 204, the isolation sleeve 203 is arranged on the outer surface of the prestressed tendon 102, and the anchor cup 204 can be filled with a chilled casting bond wrap material 205.
In one embodiment, as shown in fig. 3, the sealing end 300 includes: the cable comprises a restraining ring 301, a sealing cylinder 302, a sealing ring 304, a compression ring 305 and a heat-shrinkable sleeve 306, wherein the sealing cylinder 302 is open at two ends and is convenient for the cable body 100 and the prestressed tendons 102 to penetrate; the restraint ring 301 is arranged at the joint of the sealing cylinder 302 and the anchoring end 200, so that the fastening effect of the sealing cylinder 302 and the anchoring end 200 can be improved; the heat-shrinkable sleeve 306 is sleeved on the cable body 100 in a penetrating manner and fixedly connected with the outer surface of the sealing barrel 302 for realizing the sealing of the transition part of the cable body 100 and the sealing barrel 302; the compression ring 305 is arranged at the joint of the sealing cylinder 302 and the heat-shrinkable sleeve 306, and the sealing ring 304 is sleeved on the cable body 100 in a penetrating manner and fixedly connected with the inner surface of the sealing cylinder 302, so that the cable body 100 is more stable in the sealing cylinder 302, and the sealing effect of the cable body 100 at the joint of the sealing cylinder 302 and the anchoring end 200 can be effectively guaranteed through the structural arrangement of the sealing end 300.
In one embodiment, as shown in fig. 4a and 4b, for practical engineering needs, the tendon 102 may be a steel strand 103 a; in yet another embodiment, as shown in fig. 5a and 5b, the tendon 102 may be a steel wire 103 b; in yet another embodiment, as shown in fig. 6a and 6b, the tendon 102 may also be a composite of steel strand 103a and steel wire 103 b; the three structural arrangements are suitable for different engineering requirements, when the prestressed tendon 102 is a steel strand 103a, pier head treatment is carried out on a central steel wire of the steel strand 103a, and temporary anchoring between the annular anchor plate 202 and the prestressed tendon 102 is realized; when the prestressed tendons 102 are the steel wires 103b, the steel wires 103b uniformly distributed in the steel wires 103b passing through the annular anchor plate 202 are randomly selected to be subjected to pier nose treatment, so that the temporary anchoring of the prestressed tendons 102 and the annular anchor plate 202 is realized; when the prestressed tendons 102 are a composite body of the steel strands 103a and the steel wires 103b, only the steel wires 103b in the prestressed tendons 102 passing through the annular anchor plate 202 are subjected to pier head treatment, so that temporary anchoring of the composite prestressed tendons 102 and the annular anchor plate 202 is realized, and anchoring requirements of different projects can be met.
In one embodiment, as shown in fig. 9a, 9b, and 9c, the structure of the isolation sleeve 203 is a hollow cylinder or a hollow cube with a slope on the outer surface, or a hollow cylinder with a saw-toothed outer surface, and when the isolation sleeve 203 is a hollow cylinder with a slope on the outer surface, the outer surface area of the isolation sleeve 203 is increased, so that the contact surface between the chilled gripping material 205 and the isolation sleeve 203 is larger, and the stress on the penetrating prestressed ribs 102 is more uniform; when the isolation sleeve 203 is a hollow cube, the two ends of the isolation sleeve 203 can be better ensured to be uniformly stressed in the cold-cast bond wrapping material 205, and the stability of the prestressed tendon 102 is ensured; when the outer surface of the isolation sleeve 203 is a serrated hollow cylinder, the contact degree between the outer surface of the isolation sleeve 203 and the chilled casting bond wrapping material 205 can be better ensured, so that the isolation sleeve 203 cannot slide in the chilled casting bond wrapping material 205, and the effect of ensuring the stability of the prestressed tendon 102 is achieved.
In one embodiment, as shown in fig. 7, the shape of the opening in the anchor cup 204 is formed by more than 1 wedge 206, after the chilled bonding material 205 is filled, the wedge 206 can realize partial pressure, the combination of a plurality of wedges 206 can realize multi-stage partial pressure, the multi-stage partial pressure wedge 206 increases the contact area between the inner cavity of the anchor cup 204 and the chilled bonding material 205, and the chilled bonding material 205 filled in the inner cavity can effectively transfer the force on the tendon 102 to the anchor cup 204.
The invention also provides a manufacturing method of the compact steel strand inhaul cable, which comprises the following steps:
step 1: manufacturing the prestressed tendons 102 into a cable body 100, stripping an outer ring PE layer of the cable body 100 according to the anchoring length, and cleaning the prestressed tendons 102 exposed after the PE layer of the cable body 100 is stripped;
step 2: manufacturing an anchoring end 200, installing an annular anchor plate 202, and sleeving the annular anchor plate 202 on the prestressed tendon 102 at the outermost ring of the cable body 100 in a penetrating manner; installing an isolation sleeve 203, and sleeving the isolation sleeve 203 on the prestressed tendons 102 in the middle of the cable body 100 in a penetrating manner, wherein the isolation sleeve 203 is arranged on the prestressed tendons 102 in a stepped spiral manner, and the isolation sleeve 203 on each prestressed tendon 102 is not contacted with each other;
and step 3: pouring and curing, as shown in fig. 10 to 12, placing the annular anchor plate 202 and the prestressed tendons 102 into the anchor cup 204, fixedly connecting the end cover 201 with the anchor cup 204, installing the annular anchor plate 202 on the end cover 201, rotationally fastening the grouting tool pressing plate 207 with the outer surface of the anchor cup 204, tightly pressing the end cover 201 by using the inner hexagon screws 208, installing the outer hexagon bolts 209 to vertically place the anchor cup 204, filling the inner cavity of the anchor cup 204 with the cold-cast bonding material 205, and vibrating by using a vibrator to make the cold-cast bonding material 205 more compact;
and 4, step 4: after the pouring is finished, a restraint ring 301 is installed, the anchoring end 200 is placed in a high-temperature curing furnace for constant-temperature curing, the chilled bonding material 205 is cured to form wedge-shaped bonding force, so that the anchoring effect is achieved, and after the curing is finished, the end cover 201 and the grouting tool pressing plate 207 are rotated and twisted out;
and 5: the first pretensioning makes the prestressed tendons 102 in the cable body 100 stressed uniformly, eliminates the gaps among the prestressed tendons 102, and makes the cable body 100 elastic and stable;
step 6: vertically placing the anchor head, screwing the sealing cylinder 302 of the sealing end 300 and the anchor cup 204 of the anchoring end 200 in a threaded fit manner, filling the inner cavity of the sealing cylinder 302 with a sealing filling material 303, then installing a sealing ring 304 and a pressing ring 305 on the sealing cylinder 302, and vertically standing until the sealing filling material 303 is cured;
and 7: and (2) performing second pre-tensioning, loading according to 40% of the nominal force of the cable body 100, keeping the load for 10-30 minutes, eliminating a gap between the prestressed tendon 102 in the cable body 100 and the cold-cast bond wrapping material 205 in the sealing end 300, twisting the end cover 201 in place, installing a heat-shrinkable sleeve 306 at the transition sections of the cable body 100 and the sealing end 300, and obtaining the compact steel strand inhaul cable.
In one embodiment, as shown in fig. 4a and 4b, for practical engineering needs, the tendon 102 may be a steel strand 103 a; in yet another embodiment, as shown in fig. 5a and 5b, the tendon 102 may be a steel wire 103 b; in yet another embodiment, as shown in fig. 6a and 6b, the tendon 102 may also be a composite of steel strands 103a and steel wires 103 b.
In one embodiment, when the tendon 102 is a steel strand 103a, pier treatment is performed on a central steel wire of the steel strand 103a to realize temporary anchoring between the annular anchor plate 202 and the tendon 102; when the prestressed tendons 102 are the steel wires 103b, the steel wires 103b uniformly distributed in the steel wires 103b passing through the annular anchor plate 202 are randomly selected to be subjected to pier nose treatment, so that the temporary anchoring of the prestressed tendons 102 and the annular anchor plate 202 is realized; when the prestressed tendons 102 are a composite body of the steel strands 103a and the steel wires 103b, only the steel wires 103b of the prestressed tendons 102 passing through the annular anchor plate 202 are subjected to pier heading treatment, so that temporary anchoring of the composite prestressed tendons 102 and the annular anchor plate 202 is realized.
Reference in the specification to "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, structure, or characteristic of one or more other embodiments without limitation, as long as the combination is not logical or operational. Additionally, the various elements of the drawings of the present application are merely schematic illustrations and are not drawn to scale.
Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention.
Claims (8)
1. A compact steel strand stay comprising: the cable body that constitutes by the prestressing tendons to and wear anchor end and the sealed end of cover on the cable body, anchor end and sealed end fixed connection, the prestressing tendons of the cable body and the tip rigid coupling of anchor end, its characterized in that, the anchor end includes: the anchor comprises an end cover, an annular anchor plate, an isolation sleeve and an anchor cup, wherein one end of the anchor cup is opened, the other end of the anchor cup is provided with the end cover fixedly connected with the prestressed tendon, the annular anchor plate is sleeved on the prestressed tendon in a penetrating mode and wedged into the inner surface of the anchor cup, and the isolation sleeve is arranged on the outer surface of the prestressed tendon.
2. The compact steel strand cable of claim 1, wherein the sealed end comprises: the cable comprises a restraint ring, a sealing cylinder, a sealing ring, a compression ring and a heat-shrinkable sleeve, wherein the sealing cylinder is provided with openings at two ends, the restraint ring is arranged at the joint of the sealing cylinder and an anchoring end, the heat-shrinkable sleeve is sleeved on a cable body in a penetrating manner and is fixedly connected with the outer surface of the sealing cylinder, the compression ring is arranged at the joint of the sealing cylinder and the heat-shrinkable sleeve, and the sealing ring is sleeved on the cable body in a penetrating manner and is fixedly connected with the inner surface of the sealing cylinder.
3. The compact steel strand stay cable of claim 1 or 2, wherein: the prestressed tendons are steel strands and/or steel wires.
4. The compact steel strand stay cable of claim 1 or 2, wherein: the structure of the isolation sleeve is a hollow cylinder or a hollow cube with a slope on the outer surface or a hollow cylinder with a sawtooth-shaped outer surface.
5. The compact steel strand stay cable of claim 1 or 2, wherein: the shape of the opening in the anchor cup is formed by more than 1 wedge.
6. A manufacturing method of a compact steel strand inhaul cable is characterized by comprising the following steps:
step 1: manufacturing the prestressed tendons into a cable body, stripping an outer ring PE layer of the cable body according to the anchoring length, and cleaning the prestressed tendons exposed after the PE layer of the cable body is stripped;
step 2: manufacturing an anchoring end, installing an annular anchor plate, and sleeving the annular anchor plate on the prestressed tendon at the outermost ring of the cable body in a penetrating manner; mounting an isolation sleeve, and sleeving the isolation sleeve on the prestressed tendons at the middle position of the cable body in a penetrating manner, wherein the isolation sleeve is arranged on the prestressed tendons in a stepped spiral manner, and the isolation sleeves on the prestressed tendons are not mutually contacted;
and step 3: pouring and solidifying, namely placing an annular anchor plate and a prestressed tendon into an anchor cup, fixedly connecting an end cover with the anchor cup, mounting the annular anchor plate on the end cover, rotationally fastening a grouting tool pressing plate and the outer surface of the anchor cup, adopting an inner hexagon screw to compress the end cover, mounting an outer hexagon bolt to vertically place the anchor cup, filling the inner cavity of the anchor cup with a cold-cast bonding material, and adopting a vibrator to vibrate to enable the cold-cast bonding material to be more compact;
and 4, step 4: after the pouring is finished, a restraint ring is installed, the anchoring end is placed in a high-temperature curing furnace for constant-temperature curing, the cold-cast bond material is cured to form wedge-shaped bond force, so that the anchoring effect is achieved, and after the curing is finished, the grouting cover plate and the grouting tool pressing plate are rotated and twisted out;
and 5: the first pretensioning makes the prestressed tendons in the cable body stressed uniformly, eliminates the gaps among the prestressed tendons and makes the elastic modulus of the cable body stable;
step 6: vertically placing an anchor head, screwing a sealing cylinder at a sealing end and an anchor cup at an anchoring end in a threaded fit manner, filling a sealing filling material into an inner cavity of the sealing cylinder, then installing a sealing ring and a compression ring on the sealing cylinder, and vertically standing until the sealing filling material is cured;
and 7: and (3) performing second pre-tensioning, loading according to 40% of the nominal force of the cable body, keeping the load for 10-30 minutes, eliminating a gap between a prestressed tendon in the cable body and a cold-cast bond wrapping material in the sealing end, twisting the cover plate in place, and installing a heat-shrinkable sleeve at the transition section of the cable body and the sealing end.
7. The method for manufacturing the compact steel strand inhaul cable according to claim 6, wherein: the prestressed tendons are steel strands and/or steel wires.
8. The method for manufacturing a compact steel strand inhaul cable according to claim 7, wherein: when the prestressed tendons are steel strands, pier head treatment is carried out on central steel wires of the steel strands, and the annular anchor plates and the prestressed tendons are temporarily anchored; when the prestressed tendons are steel wires, the steel wires uniformly distributed in the steel wires penetrating through the annular anchor plate are randomly selected for pier head treatment, so that temporary anchoring of the prestressed tendons and the annular anchor plate is realized; when the prestressed tendons are a complex of steel strands and steel wires, only the steel wires in the prestressed tendons penetrating through the annular anchor plate are subjected to pier head treatment, and temporary anchoring of the composite prestressed tendons and the annular anchor plate is achieved.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442735A (en) * | 2020-04-03 | 2020-07-24 | 广西大学 | Method for manufacturing polymer rubber-insulated-wire fiber grating strain sensor and intelligent cable |
| CN112458898A (en) * | 2020-11-02 | 2021-03-09 | 江苏法尔胜缆索有限公司 | Corrosion-resistant fatigue-resistant chilled casting anchorage device for ultra-high-strength and ultra-long stay cable |
| CN112593660A (en) * | 2020-12-11 | 2021-04-02 | 柳州欧维姆机械股份有限公司 | Extrusion anchorage sleeve inhaul cable and manufacturing method thereof |
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