CN109385961B - Emergency cable system for quick repair of parallel steel wire stay cable - Google Patents
Emergency cable system for quick repair of parallel steel wire stay cable Download PDFInfo
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- CN109385961B CN109385961B CN201811274453.8A CN201811274453A CN109385961B CN 109385961 B CN109385961 B CN 109385961B CN 201811274453 A CN201811274453 A CN 201811274453A CN 109385961 B CN109385961 B CN 109385961B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 230000008439 repair process Effects 0.000 title claims description 20
- 238000004873 anchoring Methods 0.000 claims abstract description 67
- 229910045601 alloy Inorganic materials 0.000 claims description 19
- 239000000956 alloy Substances 0.000 claims description 19
- 229910000611 Zinc aluminium Inorganic materials 0.000 claims description 17
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 239000004698 Polyethylene Substances 0.000 claims description 13
- 238000001192 hot extrusion Methods 0.000 claims description 13
- -1 polyethylene Polymers 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000003491 array Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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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
Abstract
The invention relates to an emergency cable system for quickly repairing parallel steel wire stay cables, which is used for connecting broken beam end stay cables and tower end stay cables and mainly comprises a beam end and a tower end anchoring member, a plurality of groups of high-strength parallel steel wire cable units, a plurality of groups of cable tensioning and length adjusting members, wherein the beam end stay cables are correspondingly anchored on the beam end anchoring member, the tower end stay cables are correspondingly anchored on the tower end anchoring member, and two ends of the high-strength parallel steel wire cable units are correspondingly anchored on the beam end anchoring member and the tower end anchoring member respectively through the cable tensioning and length adjusting members so as to realize emergency connection of the broken beam end stay cables and the tower end stay cables. The system evenly distributes tension, is stable in connection, and enables beam end stay cable steel wires and tower end stay cable steel wires to be fast dispersed and upset to be anchored, so that the system is convenient to be fast connected with an emergency cable on site.
Description
Technical Field
The invention relates to stay cable repair, in particular to an emergency cable system for quickly connecting stay cables in the stay cable repair process.
Background
The cable-stayed bridge is a self-anchored system, does not need an expensive ground anchor, has low corrosion resistance technical requirements, has good overall rigidity and wind resistance, and is attractive, economical and relatively easy to construct. Compared with suspension bridges, the modern cable-stayed bridge has obvious advantages in wind resistance stability, economy, especially adaptability to severe geological conditions and the like due to the characteristics of high structural rigidity, self-anchored axial stress, simple cantilever construction method and the like. At present, many cross-sea and river bridges on main traffic lanes in China adopt large-span cable-stayed bridges.
The cable-stayed bridge is a bridge in which main beams are directly pulled on bridge towers by a plurality of stay ropes, and is a structural system formed by combining pressure-bearing towers, tension ropes and a bearing beam body. It can be regarded as a multi-span elastic support continuous beam with stay cables instead of the buttressing. Thus, when one or more stay cables are broken, the girder is correspondingly reduced in number of supports, the span is increased, and the girder deformation is correspondingly increased. If the deformation is too large, more deformation is beyond the expected amount and cannot be effectively controlled, the beam end is easily cracked, and the structure is damaged. In order to maintain a good stress condition on the structure, the most common method for damaged stay cables is to replace the damaged stay cables. The replacement work needs to manufacture a new stay cable with the same specification as the original stay cable, then the original stay cable and the anchor are removed on site, the working procedure is complex, and generally 1 to 2 months are needed. For bridges on important traffic roads, how to utilize the preparation parts to quickly repair stay cables in 24 hours under emergency conditions, so that the structure of the cable-stayed bridge meets the transportation requirement in a short period and maintains the normal use of the bridge.
Disclosure of Invention
The invention aims to solve the technical problem of providing an emergency cable system capable of quickly connecting broken stay cable bodies.
The large-span cable-stayed bridge stay cables mostly adopt parallel steel wire cable bodies, and in order to realize quick replacement, an emergency cable system adopts a plurality of groups of small-specification high-strength parallel steel wire cables and a plurality of groups of high-performance high-strength pull rods. Aiming at large-specification cable bodies, the emergency cable system mainly meets temporary traffic passing requirements on the premise that the anchoring systems of the beam end and the tower end of the original stay cable are not damaged, is specifically taken according to the safety coefficient of the construction stage, generally does not consider fatigue resistance, and the durability requirement of the connecting member is not less than 2 years.
The invention solves the problems by adopting the following technical scheme: an emergency cable system for quick repair of parallel steel wire stay cables is characterized in that: the system is used for connecting the broken beam end stay cables and the tower end stay cables, and mainly comprises a beam end, a tower end anchoring member, a plurality of groups of high-strength parallel steel wire cable units, a plurality of groups of cable tensioning and length adjusting members, wherein the beam end stay cables are correspondingly anchored on the beam end anchoring member, the tower end stay cables are correspondingly anchored on the tower end anchoring member, and two ends of the high-strength parallel steel wire cable units are respectively correspondingly anchored on the beam end anchoring member and the tower end anchoring member through the cable tensioning and length adjusting members so as to realize emergency connection of the broken beam end stay cables and the tower end stay cables.
Preferably, the plurality of groups of high-strength parallel steel wire inhaul cable units are arranged on the outer ring of the stay cable in a satellite surrounding mode; or are symmetrically arranged on two sides of the stay cable in two groups.
Further, the high-strength parallel steel wire inhaul cable unit is preferably an ultra-high-strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene inhaul cable, two ends of the inhaul cable are anchored by adopting an anchor, and the parallel steel wires are divergently arranged in a conical cavity of the anchor.
Specifically, the ultra-high strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene inhaul cable adopts a 5mm and 2100MPa high strength zinc-aluminum alloy coated steel wire, and the steel wire performance is shown in Table 1
TABLE 1 technical index of 5mm-2100MPa high strength zinc-aluminum alloy steel wire
Further, through hole arrays are arranged on the anchor plates of the beam end and tower end anchor members, the arrangement structure of the through hole arrays is identical with that of the parallel steel wires of the stay cables, and the parallel steel wires of the stay cables can be correspondingly penetrated one by one. And is fixed in the through hole array; the anchoring disc is also provided with a locking through hole, and the stay cable tensioning and length adjusting member at the end part of the high-strength parallel steel wire stay cable unit is fixed in the locking through hole.
Further, the stay cable tensioning and length adjusting component comprises a pull rod, a nut, a base plate, tensioning supporting feet and a jack, the pull rod further comprises a Liang Ce pull rod and a tower side pull rod, the Liang Ce pull rod and the tower side pull rod are respectively and correspondingly fixedly connected with anchorage devices at two ends of the ultra-high strength zinc-aluminum alloy coating steel wire hot extrusion polyethylene stay cable, the outer end of the Liang Cela rod is locked in the locking through hole of the beam end anchoring component, the outer end of the tower side pull rod penetrates through the locking through hole of the tower end anchoring component, the tensioning supporting feet and the jack are arranged at the outer end of the tower side pull rod, the pull rod is locked at the end part of the pull rod through the nut and the base plate, the stretching length of the pull rod is adjusted through rotating the nut, and the jack and the tensioning supporting feet are used for carrying out ultra-high strength zinc-aluminum alloy coating steel wire hot extrusion polyethylene stay cable.
Of course, the jack and the stretching supporting feet can be arranged at the outer end of the Liang Cela rod, and the stretching effect of the ultra-high strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene inhaul cable is the same as that of the outer end of the tower side pull rod.
Preferably, the pull rod and the nut are made of alloy structural steel 42CrMo pieces, and the materials are subjected to tempering and flaw detection treatment, so that the high-strength pull rod can be obtained.
In order to reduce the requirement on hoisting equipment, the rope body adopts a segmented connection structure of a plurality of groups of high-strength parallel steel wire inhaul cable units and pull rods; the cable body is classified by lengths of 6m, 10m, 20m, 40m, 50m, 100m, 200m and 300m, so that the modularization and the generalization of the cable body are realized. And a combination of a longer length cable unit and tie rod is preferred.
The application additionally provides a quick repair connection method for the parallel steel wire stay cable, which comprises the following steps of
1) Preparing the components of the emergency cable system according to claims 1-7;
2) According to the on-site damage condition, the length of the original stay cable is compared, and the connection length of the emergency cable system is calculated;
3) According to the calculated connection length, a combination mode of an emergency cable is provided, and a combination of a inhaul cable unit and a pull rod with corresponding lengths is selected;
4) The emergency cable and the beam end stay cable are quickly connected, and the specific operation is as follows:
spreading the beam end stay cables on a beam surface, penetrating steel wires into the through hole arrays of the beam end anchoring members one by one and upsetting the steel wires for fixation, so as to realize the connection of the beam end stay cables and the beam end anchoring members; then respectively and fixedly connecting upper pull rods at two sides of the high-strength parallel steel wire inhaul cable unit, respectively and penetrating the end parts of the Liang Cela rods into the locking through holes arranged in a satellite manner on the beam end anchoring member one by one and anchoring the locking through holes by nuts; the tower side pull rod is pulled by a steel wire rope winch to lift the beam end stay cable;
5) Utilize the basket operation of hanging to carry out the operation to tower end suspension cable: penetrating steel wires of the tower-end stay cables into the through hole array of the tower-end anchoring member one by one and upsetting the steel wires to fix the steel wires, so that the quick connection between the tower-end stay cables and the tower-end anchoring member is realized; the end part of the tower side pull rod passes through the locking through holes arranged in a satellite way on the tower end anchoring member and is anchored by nuts;
6) And tensioning supporting feet and a jack are arranged at the end parts of the tower side pull rods one by one, tensioning is carried out on the high-strength parallel steel wire inhaul cable units until a set tension value is reached, and then quick repair connection of the beam end inhaul cable and the tower end inhaul cable is completed.
In addition, in the step (4), in the traction operation process of the beam end stay cable, a temporary pull rod system is adopted to carry out step-by-step traction on a plurality of high-strength parallel steel wire cable units, and the temporary traction pull rod is detached after traction is in place.
Compared with the prior art, the invention has the advantages that:
(1) The emergency cable system for the stay cable with the rapid connection and fracture is designed, the effect of the stay cable is maintained in a short time, and the normal operation of a bridge is guaranteed. The system evenly distributes tension, is stable in connection, and enables beam end stay cable steel wires and tower end stay cable steel wires to be fast dispersed and upset to be anchored, so that the system is convenient to be fast connected with an emergency cable on site.
(2) The design adopts the parallel steel wire cable unit of multiunit high strength to bear tension, and multiunit emergent cable unit is satellite surrounding mode setting has reduced emergent cable installation and tensioning equipment size and weight, the quick construction in scene of being convenient for.
(3) The high-strength parallel steel wire inhaul cable unit designed by the application has universality, and can bear larger load by increasing the number of the inhaul cable units.
(4) The high-strength parallel steel wire inhaul cable unit adopts the ultra-high strength zinc-aluminum alloy coating steel wire hot extrusion polyethylene inhaul cable with the thickness of 5mm-2100MPa, the weight of the inhaul cable is reduced as much as possible on the premise of meeting the strength, and the light weight is realized.
(5) The application additionally designs a method for quickly connecting broken stay cables for quickly and reliably connecting broken beam-end stay cables with tower-end stay cables.
Drawings
FIG. 1 is a schematic view of a completed stay cable body;
FIG. 2 is a schematic view of a broken stay cable body;
FIG. 3 is a simplified illustration of a quick repair of a broken stay cable body;
FIG. 4 is a schematic connection diagram of the emergency cable system of the present application;
FIG. 5 is a schematic view of the structure of an anchor member according to an embodiment of the present application;
FIG. 6 is a schematic view in semi-section of an anchor member in an embodiment of the present application;
FIG. 7 is a schematic structural view of an emergency cable system according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a high strength parallel wire cable unit in an embodiment of the present application;
FIG. 9 is a schematic diagram of a cable tensioning and length adjustment mechanism for an emergency cable system in an embodiment of the present application;
fig. 10 is a schematic structural view of an anchor member in embodiment 2 of the present application;
fig. 11 is a cross-sectional view of the present application.
In the figure: 1 bridge tower, 2 tower end anchoring system, 3 stay cable, 4 beam end anchoring system, 5 anchor beam, 301 beam end stay cable, 302 tower end stay cable, 601 beam end anchoring member, 602 tower end anchoring member, 701 Liang Ce pull rod, 702 tower side pull rod, 801 ultra-high strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene cable, 802 anchor, 9 jack, 10 tensioning support leg, 11 nut, 12 spacer, a locking through hole, b through hole array.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Example 1
As shown in fig. 3-9, the emergency cable system for rapid repair of a parallel steel wire stay cable in this embodiment is used for connecting a broken beam end stay cable 301 and a tower end stay cable 302, and mainly comprises beam end and tower end anchoring members 601 and 602, four groups of high-strength parallel steel wire cable units, four groups of cable tensioning and length adjusting members, the beam end stay cable 301 is correspondingly anchored on the beam end anchoring member 601, the tower end stay cable 302 is correspondingly anchored on the tower end anchoring member 602, an anchoring area is formed between the beam end and the tower end anchoring member, the four groups of high-strength parallel steel wire cable units are arranged in the anchoring area of an outer ring in a satellite surrounding manner by taking the stay cable as a center, and two ends of any one high-strength parallel steel wire cable unit are respectively anchored on the beam end and the tower end anchoring member through the cable tensioning and length adjusting members so as to realize emergency connection of the broken beam end stay cable and the tower end stay cable.
The high-strength parallel steel wire inhaul cable unit adopts an ultra-high-strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene inhaul cable 802 (hereinafter also simply referred to as an inhaul cable or an emergency inhaul cable), two ends of the inhaul cable are anchored by adopting an anchor 801, and the parallel steel wires are divergently arranged in a conical cavity of the anchor. The inhaul cable adopts a zinc-aluminum alloy coated steel wire with high strength of 5mm and 2100MPa, and the performance is shown in Table 1.
In order to realize the quick connection with the original stay cable, a through hole array b is arranged on an anchoring disc of the beam end and tower end anchoring member, the arrangement structure of the through hole array b is matched with that of the parallel steel wires of the stay cable, the parallel steel wires of the stay cable penetrate through the through hole array in a one-to-one correspondence manner, and the anchoring is realized after upsetting. Four locking through holes a for fixing the high-strength parallel steel wire inhaul cable units are formed in the outer ring of the anchoring disc.
Further, the cable tensioning and length adjusting member comprises a pull rod, a nut 11, a base plate 12, a tensioning supporting foot 10 and a jack 9, the pull rod further comprises a Liang Ce pull rod 701 and a tower side pull rod 702, the Liang Ce pull rod 701 and the tower side pull rod 702 are respectively in threaded connection with anchors at two ends of the cable unit, wherein the outer end of the Liang Cela pull rod 701 is locked in a locking through hole a of the beam end anchoring member 601 through the nut 11, the outer end of the tower side pull rod 702 passes through the locking through hole a of the tower end anchoring member 602, the tensioning supporting foot 10 and the jack 9 are mounted on the outer end of the tower side pull rod 702, and the tower side pull rod is locked at the end of the tower side pull rod 702 through the nut 11 and the base plate 12. The stretching length of the pull rod can be adjusted by rotating the nut 11, and the ultra-high strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene inhaul cable is subjected to ultra-stretching by the jack and the stretching supporting feet.
The materials of the pull rod and the nut are high-strength steel members of alloy structural steel 42CrMo, and the materials are subjected to quenching and tempering and flaw detection.
In order to reduce the requirement on hoisting equipment, the rope body adopts a segmented connection structure of a plurality of groups of stay ropes and pull rods; the cable body is classified by lengths of 6m, 10m, 20m, 40m, 50m, 100m, 200m and 300m, so that the modularization and the generalization of the cable body are realized. Taking a stay cable with a Stoneway bridge 577 m as an example, a combination of 300m+200m+50mm or a combination of 6m+10m can be adopted according to the on-site damage condition.
Example 2
The present embodiment relates to a beam end and tower end anchoring member of another structure, referring to fig. 10, the anchoring member is rectangular overall, four locking through holes a are respectively located at the left and right sides of the through hole array b, and when the anchoring member of this structure is adopted, four groups of high-strength parallel steel wire inhaul cable units are linearly arranged.
Of course, the anchoring member is not limited to a circular shape or a rectangular shape, and any design for changing the shape of the anchoring member is within the scope of the inventive concept of the present application.
Example 3
The embodiment designs a quick repair connection method for a parallel steel wire stay cable, which comprises the following steps of
1) The emergency cord system configuration preparation apparatus of embodiment 1;
2) According to the on-site damage condition, the length of the original stay cable is compared, and the connection length of the emergency cable system is calculated;
3) Selecting the length combination of the inhaul cable and the pull rod in the mode of least number according to the connection length calculated in the step 2;
4) The emergency cable and the beam end stay cable are quickly connected, and the specific operation is as follows:
spreading the beam end stay cables on a beam surface, penetrating steel wires into the through hole arrays of the beam end anchoring members one by one and upsetting the steel wires for fixation, so as to realize the connection of the beam end stay cables and the beam end anchoring members; then respectively and fixedly connecting upper pull rods at two sides of the high-strength parallel steel wire inhaul cable unit, respectively and penetrating the end parts of the Liang Cela rods into the locking through holes arranged in a satellite manner on the beam end anchoring member one by one and anchoring the locking through holes by nuts; the tower side pull rod is pulled by a steel wire rope winch to lift the beam end stay cable;
5) Utilize the basket operation of hanging to carry out the operation to tower end suspension cable: penetrating steel wires of the tower-end stay cables into the through hole array of the tower-end anchoring member one by one and upsetting the steel wires to fix the steel wires, so that the quick connection between the tower-end stay cables and the tower-end anchoring member is realized; the end part of the tower side pull rod passes through the locking through holes arranged in a satellite way on the tower end anchoring member and is anchored by nuts;
6) And tensioning supporting feet and a jack are arranged at the end parts of the tower side pull rods one by one, tensioning is carried out on the high-strength parallel steel wire inhaul cable units until a set tension value is reached, and then quick repair connection of the beam end inhaul cable and the tower end inhaul cable is completed.
And (3) in the field construction process, in the traction operation process of the beam end stay cable in the step (4), a temporary pull rod system is adopted to carry out step-by-step traction on a plurality of high-strength parallel steel wire cable units, and the temporary traction pull rod is detached after traction is in place.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions that are formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.
Claims (9)
1. An emergency cable system for quick repair of a parallel steel wire stay cable is characterized in that: the system is used for connecting the broken beam end stay cables and the tower end stay cables, and mainly comprises a beam end, a tower end anchoring member, a plurality of groups of high-strength parallel steel wire cable units, a plurality of groups of cable tensioning and length adjusting members, wherein the beam end stay cables are correspondingly anchored on the beam end anchoring member, the tower end stay cables are correspondingly anchored on the tower end anchoring member, and two ends of the high-strength parallel steel wire cable units are correspondingly anchored on the beam end anchoring member and the tower end anchoring member respectively through the cable tensioning and length adjusting members so as to realize emergency connection of the broken beam end stay cables and the tower end stay cables;
the plurality of groups of high-strength parallel steel wire inhaul cable units are arranged on the outer ring of the stay cable in a satellite surrounding mode; or two groups of the stay cables are symmetrically arranged at two sides of the stay cable;
the high-strength parallel steel wire inhaul cable unit is an ultra-high-strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene inhaul cable, two ends of the inhaul cable are anchored by adopting an anchor, and the parallel steel wires are diverged in a conical cavity of the anchor;
the beam end and the tower end anchoring member are provided with through hole arrays on the anchoring disc, the arrangement structure of the through hole arrays is matched with that of the parallel steel wires of the stay cables, and the parallel steel wires of the stay cables can be correspondingly penetrated and fixed in the through hole arrays one by one; the anchoring disc is also provided with a locking through hole, and the stay cable tensioning and length adjusting member at the end part of the high-strength parallel steel wire stay cable unit is fixed in the locking through hole.
2. The emergency cable system for rapid repair of a parallel wire stayed cable according to claim 1, wherein: the ultra-high strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene inhaul cable adopts a high strength zinc-aluminum alloy coated steel wire with the thickness of 5mm and 2100 MPa.
3. The emergency cable system for rapid repair of a parallel wire stayed cable according to claim 1, wherein: the stay cable tensioning and length adjusting component comprises a pull rod, a nut, a base plate, tensioning support feet and a jack, wherein the pull rod comprises a Liang Ce pull rod and a tower side pull rod, liang Ce pull rods and the tower side pull rod are respectively and correspondingly fixedly connected with anchorage devices at two ends of the ultra-high strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene stay cable, the outer end of the Liang Cela rod is locked in a locking through hole of the beam end anchoring component, the outer end of the tower side pull rod penetrates through the locking through hole of the tower end anchoring component, the tensioning support feet and the jack are arranged at the outer end of the tower side pull rod, the pull rod is locked at the end part of the pull rod through the nut and the base plate, the tensioning length of the pull rod is adjusted through the rotating nut, and the jack and the support feet are used for performing overstretching on the ultra-high strength zinc-aluminum alloy coated steel wire hot extrusion polyethylene stay cable.
4. The emergency cable system for rapid repair of a parallel wire stayed cable according to claim 3, wherein: the pull rod and the nut are made of high-strength alloy structural steel 42CrMo pieces.
5. The emergency cable system for rapid repair of a parallel wire stayed cable according to claim 1, wherein: the length of the high-strength parallel steel wire inhaul cable unit adopts grading: lengths of 6m, 10m, 20m, 40m, 50m, 100m, 200m, 300 m.
6. The emergency cable system for quick repair of a parallel wire stayed cable according to claim 4, wherein: the length of the pull rod adopts grading: lengths of 6m, 10m, 20m, 40m, 50m, 100m, 200m, 300 m.
7. A quick repair connection method for parallel steel wire stay cables is characterized in that: the steps are as follows
1) Preparing the components of the emergency cable system according to claims 1-6;
2) According to the on-site damage condition, the length of the original stay cable is compared, and the connection length of the emergency cable system is calculated;
3) According to the calculated connection length, a combination mode of the emergency cable is provided;
4) The emergency cable and the beam end stay cable are quickly connected, and the specific operation is as follows:
spreading the beam end stay cables on a beam surface, penetrating steel wires into the through hole arrays of the beam end anchoring members one by one and upsetting the steel wires for fixation, so as to realize the connection of the beam end stay cables and the beam end anchoring members; then respectively and fixedly connecting upper pull rods at two sides of the high-strength parallel steel wire inhaul cable unit, respectively and penetrating the end parts of the Liang Cela rods into the locking through holes arranged in a satellite manner on the beam end anchoring member one by one and anchoring the locking through holes by nuts; the tower side pull rod is pulled by a steel wire rope winch to lift the beam end stay cable;
5) Utilize the basket operation of hanging to carry out the operation to tower end suspension cable: penetrating steel wires of the tower-end stay cables into the through hole array of the tower-end anchoring member one by one and upsetting the steel wires to fix the steel wires, so that the quick connection between the tower-end stay cables and the tower-end anchoring member is realized; the end part of the tower side pull rod passes through the locking through holes arranged in a satellite way on the tower end anchoring member and is anchored by nuts;
6) And tensioning supporting feet and a jack are arranged at the end parts of the tower side pull rods one by one, tensioning is carried out on the high-strength parallel steel wire inhaul cable units until a set tension value is reached, and then quick repair connection of the beam end inhaul cable and the tower end inhaul cable is completed.
8. The method for quickly repairing and connecting the parallel steel wire stayed cables according to claim 7, wherein the method comprises the following steps: in the step (4), in the traction operation process of the beam end stay cable, a temporary pull rod system is adopted to carry out step-by-step traction on a plurality of high-strength parallel steel wire cable units, and the temporary traction pull rod is detached after traction is in place.
9. The method for quickly repairing and connecting the parallel steel wire stayed cables according to claim 7, wherein the method comprises the following steps: the combination of the emergency cable in the step (3) is to select the combination of the high-strength parallel steel wire cable units and the pull rods with different lengths in a least number mode according to the connecting length calculated in the step (2).
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| CN201811274453.8A CN109385961B (en) | 2018-10-30 | 2018-10-30 | Emergency cable system for quick repair of parallel steel wire stay cable |
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| CN201811274453.8A CN109385961B (en) | 2018-10-30 | 2018-10-30 | Emergency cable system for quick repair of parallel steel wire stay cable |
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| CN109385961B true CN109385961B (en) | 2024-02-02 |
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| CN112081719B (en) * | 2019-06-13 | 2022-08-30 | 北京金风科创风电设备有限公司 | Tower barrel section, stay cable type tower frame, forming method and wind generating set |
| KR102488197B1 (en) * | 2022-06-17 | 2023-01-13 | 다올이앤씨 주식회사 | Methods for repairing of cable-stayed bridges and bracket used therefor |
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| JP3150252U (en) * | 2009-02-20 | 2009-05-07 | 陳 耀章 | Structure that can replace single steel wire of bridge cable |
| CN102286944A (en) * | 2011-08-23 | 2011-12-21 | 河海大学 | Device for replacing stay cable of cable-stayed bridge |
| CN203755182U (en) * | 2014-03-08 | 2014-08-06 | 中交三公局桥梁隧道工程有限公司 | Cable-stayed bridge stay cable replacing device |
| CN107268457A (en) * | 2017-05-19 | 2017-10-20 | 中交公路规划设计院有限公司 | A kind of compensation cable-stayed bridge of advancing integrally changes rope equipment and changes Suo Fangfa using the equipment |
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2018
- 2018-10-30 CN CN201811274453.8A patent/CN109385961B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3150252U (en) * | 2009-02-20 | 2009-05-07 | 陳 耀章 | Structure that can replace single steel wire of bridge cable |
| CN102286944A (en) * | 2011-08-23 | 2011-12-21 | 河海大学 | Device for replacing stay cable of cable-stayed bridge |
| CN203755182U (en) * | 2014-03-08 | 2014-08-06 | 中交三公局桥梁隧道工程有限公司 | Cable-stayed bridge stay cable replacing device |
| CN107268457A (en) * | 2017-05-19 | 2017-10-20 | 中交公路规划设计院有限公司 | A kind of compensation cable-stayed bridge of advancing integrally changes rope equipment and changes Suo Fangfa using the equipment |
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| CN109385961A (en) | 2019-02-26 |
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