CN111894302A - Cable dismantling device and method - Google Patents
Cable dismantling device and method Download PDFInfo
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- CN111894302A CN111894302A CN202010826744.4A CN202010826744A CN111894302A CN 111894302 A CN111894302 A CN 111894302A CN 202010826744 A CN202010826744 A CN 202010826744A CN 111894302 A CN111894302 A CN 111894302A
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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
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
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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
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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
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- Structural Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
A pull cable dismounting device and a method thereof are provided, wherein the dismounting device comprises a clamping module and a tensioning module; the clamping module comprises a first tool, a second tool, a first anti-sliding cable clamp and a second anti-sliding cable clamp; the first tool and the second tool are connected together through a tensioning module; the tensioning module comprises a tensioning screw, a straight-through hydraulic jack, a first anchor, a force transmission frame, a second anchor and a nut; the method for dismounting the stay cable comprises the steps of installing a first stay cable dismounting device, installing a second stay cable section between the second stay cable dismounting device and the tool, cutting the stay cable to be dismounted in multiple times, dismounting the fourth stay cable and the rest stay cable, and dismounting the stay cable. The stay cable dismantling device and the dismantling process are high in controllability, the safety and stability of the stay cable dismantling process can be effectively guaranteed, and the impact effect generated after the stay cable is cut off can be effectively relieved.
Description
Technical Field
The invention relates to a prestressed space structure dismantling device and process, in particular to a stay cable dismantling device and method, and belongs to the field of buildings.
Background
In recent 20 years, large-span space structures are developed vigorously, and prestressed space structures such as cable domes, suspended domes and the like are paid much attention due to the characteristics of lightness and diversified forms, and are favored in large-span space structure buildings such as stadiums, industrial warehouses and the like. But over time, a large number of old buildings will be subject to reconstruction, extension and even demolition due to expired service or insufficient functions. In a prestressed space structure, a steel cable is often one of the most important load-bearing members, and when the steel cable is dismantled, if protective measures are not taken, the cable force is released instantly after the steel cable is cut off, so that severe impact is caused to the structure, a series of chain reactions are generated on the structure, and even the rest structure is locally or integrally collapsed. Meanwhile, at the moment of releasing the cable force, the steel cable can move irregularly violently, thereby damaging surrounding buildings and even causing casualties.
Through patent literature retrieval, a cable-stayed bridge cable cutting device of publication No. CN109137763A relates to cable removal, and the device realizes the cutting removal of a cable-stayed bridge cable through the combined action of a clamping mechanism, a tensioning mechanism and a bearing mechanism so as to carry out subsequent cable replacement on the cable-stayed bridge. However, when the device is used for dismantling construction, the fixing nut needs to be manually screwed to loosen the pull rod, so that cable force unloading is realized, the controllability of actual construction is poor, and great potential safety hazards exist.
Disclosure of Invention
The invention provides a stay cable dismantling device and a stay cable dismantling method for overcoming the defects of the prior art.
The invention provides a guy cable dismantling device which comprises a clamping module and a tensioning module, wherein the clamping module is used for clamping a guy cable; the clamping module comprises a first tool, a second tool, a first anti-sliding cable clamp and a second anti-sliding cable clamp, and the first tool and the second tool are connected together through a tensioning module; the first anti-sliding cable clamp and the second anti-sliding cable clamp are provided with toothed holes for clamping and limiting a cable to be disassembled;
the tensioning module comprises a tensioning screw, a straight-through hydraulic jack, a first anchor, a force transmission frame, a second anchor and a nut; the tensioning screw rod penetrates through the first tool and the second tool, the straight-through hydraulic jack, the first anchor, the force transmission frame and the second anchor are all arranged on one side of the first tool, the first anchor and the second anchor are sleeved on the tensioning screw rod, the straight-through hydraulic jack and the force transmission frame which are connected with the tensioning screw rod in series are arranged between the first anchor and the second anchor, the straight-through hydraulic jack is tightly propped against the first anchor and the force transmission frame respectively, the force transmission frame is fixedly connected with the first tool, the second anchor is arranged between the first anchor and the second anchor, one end of the tensioning screw rod is limited by the second anchor, and the other end of the tensioning screw rod is fixed by a nut which is abutted against two side faces of the second tool and screwed on the tensioning screw rod; during the use, first frock, second frock, first anti-skidding cable clamp and second anti-skidding cable clamp link together through treating the cable of tearing open.
The invention also provides a guy cable dismantling method, which comprises the steps of firstly assembling the clamping module and the tensioning module and clamping the guy cable to be dismantled, respectively arranging a first tool and a second tool at two sides of the cutting position of the guy cable to be dismantled, clamping a to-be-disassembled cable, installing a first anti-sliding cable clamp on one side, close to a cutting position, of a first tool and tightly attaching the first tool, installing a second anti-sliding cable clamp on one side, close to the cutting position, of a second tool and tightly attaching the second tool, penetrating the to-be-disassembled cable into a tooth-shaped hole, clamping the to-be-disassembled cable by the first anti-sliding cable clamp and the second anti-sliding cable clamp, penetrating a tensioning screw rod on the first tool and the second tool, respectively arranging a core-through hydraulic jack, a first anchorage device, a force transmission frame and a second anchorage device on one side, far away from the cutting position, of the to-be-disassembled cable, limiting one end of the tensioning screw rod through the second anchorage device, and fixing the other end of the tensioning screw rod through nuts arranged on two sides of the second tool;
secondly, unloading the cable section between the tools, tensioning the tensioning screw rod by feeding oil to the feed-through hydraulic jack to enable the second tool and the first tool to be close to each other, loosening the cable section to be disassembled between the two tools, adjusting a second anchorage device to be tightly attached to the first tool to temporarily fix the tensioning screw rod, returning oil to the feed-through hydraulic jack, transferring partial tension of the cable section between the first tool and the second tool to the tensioning screw rod, and finally adjusting the first anchorage device to be tightly attached to the feed-through hydraulic jack;
thirdly, cutting the stay cable to be disassembled in multiple times, standing for a period of time after each completion, cutting the stay cable to be disassembled again after no abnormal condition exists, reducing the section of the stay cable to be disassembled along with the cutting, gradually increasing the tension of the tensioning screw rod until the stay cable to be disassembled is cut off, and completely transferring the cable force of the cable section between the first tool and the second tool to the tensioning screw rod when the tension borne by the tensioning screw rod is maximum;
fourthly, unloading the residual guy cable, stretching the tension screw rod by feeding oil to the feed-through hydraulic jack, enabling the second tool to be close to the first tool, moving the second anchor along the tension screw rod for a certain distance after the second anchor is loosened and separated from the first tool, returning oil to the feed-through hydraulic jack, retracting the tension screw rod until the second anchor is contacted with the first tool again and is abutted tightly, loosening the guy cable connected with the first tool and the second tool respectively after cutting the guy cable to be disassembled, reducing the cable force, weakening the impact effect, and adjusting the first anchor to be abutted tightly with the feed-through hydraulic jack again;
and fifthly, dismantling the stay cable, repeating the fourth step until the cable force of the stay cable connected with the first tool and the second tool after the stay cable to be dismantled is cut is unloaded to a specified value, then dismantling the clamping module and the tensioning module, conveying the cut stay cable to the ground or an operation platform by using hoisting equipment, and completing construction of dismantling the stay cable.
Compared with the prior art, the invention has the beneficial effects that:
1. the inhaul cable dismantling device provided by the invention realizes the relaxation of the inhaul cable by utilizing the cooperative work of the hydraulic jack through the clamping module and the tensioning module, and is obviously different from the mode of loosening the inhaul cable by manually loosening the fixing bolt in the prior art, so that the inhaul cable dismantling device has strong controllability in the operation process and can effectively ensure the safety and stability of the inhaul cable dismantling process.
2. The cable dismantling device has strong applicability, can replace penetrating hydraulic jacks with different tonnages and tensioning screws with different strengths, and can increase the number of the tensioning screws and the penetrating hydraulic jacks so as to realize the dismantling of cables with different cable forces and increase the length of the tensioning screws so as to adapt to the unloading strokes of different cables.
3. The guy cable dismantling device and method provided by the invention are suitable for dismantling guys such as ring cables, ridge cables, oblique cables and the like in prestressed space structures such as a cable dome, a truss string, a suspended dome and the like, can effectively relieve the impact effect generated after the guys are cut off, and protect the safety of surrounding personnel and buildings.
4. The invention provides a guy cable dismantling device and method, which are suitable for dismantling a single guy cable and a plurality of guy cables simultaneously, can shorten the construction period and save the cost.
The technical scheme of the invention is further explained by combining the drawings and the embodiment:
drawings
Fig. 1 is a schematic perspective view of a cable dismantling device according to the present invention;
FIG. 2 is a front view of the rally removal device of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at K;
FIG. 4 is a schematic structural diagram of the first tool or the second tool;
FIG. 5 is a schematic structural view of a wedge clip;
FIG. 6 is a schematic structural view of the first sliding cable clamp or the second sliding cable clamp;
FIG. 7 is a schematic structural view of a tooth pad;
FIG. 8 is a drawing of a cable removal process.
Detailed Description
Referring to fig. 1 to 3, a cable dismantling device of the present embodiment includes a clamping module and a tensioning module,
the clamping module comprises a first tool 2, a second tool 3, a first anti-sliding cable clamp 4 and a second anti-sliding cable clamp 5, and the first tool 2 and the second tool 3 are connected together through a tensioning module; the first anti-sliding cable clamp 4 and the second anti-sliding cable clamp 5 are provided with toothed holes for clamping and limiting the stay cable 1 to be disassembled;
the tensioning module comprises a tensioning screw 6, a straight-through hydraulic jack 7, a first anchor 8, a force transmission frame 9, a second anchor 10 and a nut 11; a tension screw 6 is arranged on a first tool 2 and a second tool 3 in a penetrating mode, a penetrating type hydraulic jack 7, a first anchor 8, a force transmission frame 9 and a second anchor 10 are all arranged on one side of the first tool 2, the first anchor 8 and the second anchor 10 are sleeved on the tension screw 6, the penetrating type hydraulic jack 7 and the force transmission frame 9 which are connected with the tension screw 6 in series are arranged between the first anchor 8 and the second anchor 10, the penetrating type hydraulic jack 7 is tightly propped against the first anchor 8 and the force transmission frame 9 respectively, the force transmission frame 9 is fixedly connected with the first tool 2, the second anchor 10 is arranged between the first anchor 8 and the second anchor 10, one end of the tension screw 6 is limited through the second anchor 10, and the other end of the tension screw 6 is fixed through a nut 11 which is abutted against two side faces of the second tool 3 and screwed on the tension screw 6; during the use, first frock 2, second frock 3, first anti-skidding cable clamp 4 and second anti-skidding cable clamp 5 link together through treating to tear cable 1 open.
The feed-through hydraulic jack 7 is connected in series to the stretching screw 6 and tightly propped against the force transfer frame 9, so that the controllability of the whole cable dismantling device is improved, one end of the stretching screw 6 is limited by the second anchor 10, the second anchor 10 plays a role in temporary fixation, the stretching screw 6 and the first tool 2 are prevented from sliding relatively in the stretching process, the other end of the stretching screw 6 is fixed by nuts 11 arranged on two sides of the second tool 3, the nuts 11 are screwed on the stretching screw 6, and the relative sliding between the stretching screw 6 and the second tool 3 can be effectively avoided; the first anchor 8 is installed in front of the feed-through hydraulic jack 7, the feed-through hydraulic jack 7 drives the first anchor 8 to move along the tensioning screw 6 through oil feeding, tensioning of the tensioning screw 6 is achieved, the tensioning screw 6 retracts through oil return, and tensioning is achieved. The force transmission frame 9 is fixedly connected to the first tool 2 and provides counter force for the through hydraulic jack 7. The clamping module and the tensioning module of the cable dismounting device work in a cooperative mode, the clamping module clamps the cable to be dismounted all the time, the tensioning module provides support and transmits the counter force of the tensioning module, the counter force is the basis for dismounting the cable, the tensioning module passes through the force transmission frame 9 and the clamping module are tightly supported all the time, and the power device for dismounting the cable 1 is realized. As an example, as shown in fig. 1, a set of tensioning modules is respectively arranged on the left and right of the first tool 2 and the second tool 3, and a plurality of tensioning modules can be uniformly distributed on the left and right of the tools according to the actual strength of the cable 1 to be disassembled. Both the first anchorage 8 and the second anchorage 10 may be clip type tension anchorages.
In an embodiment of the foregoing embodiment, the first tool 2 and the second tool 3 have the same structure, as shown in fig. 4, the first tool 2 and the second tool 3 are formed by butt-jointing two clamp plates 20, a plurality of wedge-shaped grooves are formed at the butt-joint position of the two clamp plates 20, the wedge-shaped clamping pieces 21 are installed in the wedge-shaped grooves, and anti-slip grooves and anti-slip convex teeth which are alternately arranged are formed on the surfaces of the wedge-shaped clamping pieces 21 and the surface of the stay cable 1 to be disassembled. The two clamping plates 20 clamp and limit the cable 1 to be disassembled through the wedge-shaped clamping pieces 21. The two clamp plates 20 are fastened together by high strength clamp plate bolts 23. As shown in fig. 4, stiffening ribs 23 are further disposed on the first fixture 2 and the second fixture 3 to improve the carrying capacity of the fixtures. The wedge clamping piece 21 is installed at the wedge recess of frock and treats to tear open between cable 1, sets up anti-skidding recess or anti-skidding dogtooth with the surface of treating to tear open cable 1 contact to be done the galvanizing coat, guarantee that the cable clamp presss from both sides the cable tightly, anti-skidding recess or anti-skidding dogtooth are arranged along the direction of treating to tear open cable 1 axis, and the projected length direction of anti-skidding recess and anti-skidding dogtooth is perpendicular with the length of treating to tear open cable 1. The wedge-shaped clamping pieces 21 are arranged in wedge-shaped grooves of the clamping plates 20 of the first tool 2 and the second tool 3, so that the tools clamp the cables 1 to be disassembled. When the wedge-shaped clamping piece 21 can not ensure that the first tool 2 and the second tool 3 and the stay cable to be disassembled are always clamped, the inclination angle of the wedge-shaped clamping piece 21 can be adjusted or other forms of clamping pieces can be adopted. Optionally, the number of the wedge-shaped clamping pieces 21 is 3, and other numbers can be selected according to actual conditions.
As shown in fig. 5, preferably, the anti-slip grooves and the anti-slip teeth constitute a helical thread. So set up, processing is simple and convenient, uses reliably.
In another example of the above embodiment, the first anti-slip cable clamp 4 and the second anti-slip cable clamp 5 have the same structure. As shown in fig. 6 to 7, the first anti-sliding cable clamp 4 and the second anti-sliding cable clamp 5 are formed by two half ring cable clamps 41 in a butt joint manner, the inner walls of the two half ring cable clamps 41 are respectively provided with a plurality of tooth-shaped slots, each tooth-shaped slot is internally provided with a tooth-shaped base plate 42, and a tooth-shaped hole is formed after the tooth-shaped base plates 42 are spliced. The two half ring cable clamps 41 clamp and limit the cable 1 to be disassembled through the tooth-shaped base plate 42. Preferably, the surface of the tooth-shaped backing plate 42 is provided with a zinc coating to ensure that the cable clamp clamps the cable. The inner and outer surfaces of the tooth-shaped backing plate 42 are both provided with outwardly protruding teeth, and the two side surfaces of the teeth are provided with downward conical surfaces. In the actual cable dismantling construction process, the first anti-sliding cable clamp 4 and the second anti-sliding cable clamp 5 can effectively limit the first tool 2 and the second tool 3, and the relative sliding of a cable and the tools is avoided. When the first anti-sliding cable clamp 4 and the second anti-sliding cable clamp 5 cannot effectively limit the relative sliding between the first tool 2 and the second tool 3 and the cable 1 to be disassembled, the anti-sliding effect can be increased by adjusting the parameters of the tooth-shaped gasket 42, replacing the tooth-shaped gasket with another type of gasket or increasing the length of the cable clamp along the cable direction. The clamping module enables the stay cable 1 to be disassembled to be always clamped in the construction process of disassembling the stay cable, and the clamping module is also a foundation for unloading the stay cable subsequently.
As shown in FIG. 3, in order to facilitate the arrangement of the second anchorage 10, the force-transmitting frame 9 comprises a force-transmitting plate 9-1 and a force-transmitting column 9-2; a plurality of force transmission columns 9-2 are uniformly and fixedly connected to one side face of the force transmission plate 9-1, the length directions of the force transmission columns 9-2 are parallel to the length direction of the tensioning screw 6, the force transmission columns 9-2 are fixedly connected with the first tool 2, and the force transmission plate 9-1 is tightly jacked with the through hydraulic jack 7. A plurality of force transmission columns 9-2 surround to form a hollow cavity, and a second anchor 10 is arranged in the hollow cavity and has enough space so as to be convenient to move on the stay cable 1 to be disassembled to tightly push the first tool 2 and stretch the tension screw 6.
Another embodiment also provides a guy cable dismantling method, which can realize safe and reliable guy cable dismantling; with reference to fig. 1 to 7, the specific method steps include:
firstly, assembling a clamping module and a tensioning module and clamping a cable to be disassembled, respectively arranging a first tool 2 and a second tool 3 at two sides of a cutting position of the cable 1 to be disassembled, clamping the cable 1 to be disassembled, installing a first anti-sliding cable clamp 4 at one side of the first tool 2 close to the cutting position and tightly attached to the first tool 2, installing a second anti-sliding cable clamp 5 at one side of the second tool 3 close to the cutting position and tightly attached to the second tool 3, penetrating the cable 1 to be disassembled into a tooth-shaped hole, clamping the cable 1 to be disassembled by the first anti-sliding cable clamp 4 and the second anti-sliding cable clamp 5, assembling the tensioning module on the first tool 2 and the second tool 3, determining the position relation, penetrating a tensioning screw 6 on the first tool 2 and the second tool 3, respectively arranging a core-penetrating hydraulic jack 7, a first anchorage device 8, a force transfer frame 9 and a second anchorage device 10 at one side of the first tool 2 far away from the cutting position of the cable 1 to be disassembled, one end of the tension screw 6 is limited through a second anchorage device 10, the other end of the tension screw 6 is fixed through nuts 11 arranged on two sides of the second tool 3, the nuts 11 are screwed on the tension screw 6, and the rest are connected and arranged as the device is dismounted;
secondly, unloading the cable section between the tools, tensioning the tensioning screw 6 by feeding oil to the feed-through hydraulic jack 7, enabling the second tool 3 and the first tool 2 to be close to each other through the cooperative work of the clamping module and the tensioning module, loosening the cable section to be disassembled between the two tools, adjusting the second anchorage device 10 to be tightly attached to the first tool 2 to realize the temporary fixation of the tensioning screw 6, returning oil to the feed-through hydraulic jack 7, transferring partial tension of the cable section between the first tool 2 and the second tool 3 to the tensioning screw 6, and finally adjusting the first anchorage device 8 to be tightly attached to the feed-through hydraulic jack 7; the method specifically comprises the following steps: the first anchor 8 is installed in front of the feed-through hydraulic jack 7, the feed-through hydraulic jack 7 drives the first anchor 8 to move along the tensioning screw 6 through oil feeding, tensioning of the tensioning screw 6 is achieved, the tensioning screw 6 retracts through oil return, and tensioning is achieved. The force transmission frame 9 is welded on the first tool and provides counter force for the feed-through hydraulic jack 7;
thirdly, cutting the stay cable to be disassembled in multiple times, standing for a period of time after cutting the stay cable 1 to be disassembled, cutting the stay cable 1 to be disassembled again after no abnormal condition exists, reducing the section of the stay cable 1 to be disassembled along with the cutting, gradually increasing the tension of the tension screw 6 until the stay cable 1 to be disassembled is cut off, and completely transferring the cable force of the cable section between the first tool 2 and the second tool 3 to the tension screw 6 at the moment when the tension screw 6 bears the maximum tension;
fourthly, unloading the residual guy cable, tensioning the tensioning screw 6 by feeding oil to the feed-through hydraulic jack 7, enabling the second tool 3 to be close to the first tool 2 through the cooperative work of the clamping module and the tensioning module, moving the second anchor 10 for a certain distance along the tensioning screw 6 away from the first tool 2 after the second anchor 10 is loosened and separated from the first tool 2, returning oil to the feed-through hydraulic jack 7, retracting the tensioning screw 6 until the second anchor 10 is contacted and abutted with the first tool 2 again, loosening the guy cable connected with the first tool 2 and the second tool 3 respectively after the guy cable 1 is cut, reducing the cable force, weakening the impact effect, and adjusting the first anchor 8 to be abutted with the feed-through hydraulic jack 7 again;
and fifthly, dismantling the stay cable, repeating the fourth step until the cable force of the stay cable connected with the first tool 2 and the second tool 3 respectively after the stay cable 1 to be dismantled is cut is unloaded to a specified value, then dismantling the clamping module and the tensioning module, conveying the cut stay cable to the ground or an operation platform by using hoisting equipment, and completing construction of dismantling the stay cable.
Particularly, in the fifth step, the form of the peripheral structure of the fixed stay cable is monitored constantly in the process of unloading the stay cable in the fourth step, if the peripheral structure has a tendency of collapsing (such as overlarge deformation or damage of other parts), unloading is stopped immediately, protective measures are taken, and unloading is continued after the peripheral structure is stable and does not collapse.
The present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the invention.
Claims (9)
1. A guy cable dismantling device comprises a clamping module and a tensioning module; the method is characterized in that:
the clamping module comprises a first tool (2), a second tool (3), a first anti-sliding cable clamp (4) and a second anti-sliding cable clamp (5), and the first tool (2) and the second tool (3) are connected together through a tensioning module; the first anti-sliding cable clamp (4) and the second anti-sliding cable clamp (5) are provided with tooth-shaped holes for clamping and limiting the stay cable (1) to be disassembled;
the tensioning module comprises a tensioning screw (6), a feed-through hydraulic jack (7), a first anchor (8), a force transmission frame (9), a second anchor (10) and a nut (11); a tension screw (6) is arranged on the first tool (2) and the second tool (3) in a penetrating way, a penetrating hydraulic jack (7) and a first anchorage device (8), the force transmission frame (9) and the second anchor (10) are uniformly arranged on one side of the first tool (2), the first anchor (8) and the second anchor (10) are sleeved on the tensioning screw (6), a penetrating hydraulic jack (7) and the force transmission frame (9) which are connected with the tensioning screw (6) in series are arranged between the first anchor (8) and the second anchor (10), the penetrating hydraulic jack (7) is tightly propped against the first anchor (8) and the force transmission frame (9) respectively, the force transmission frame (9) is fixedly connected with the first tool (2), the second anchor (10) is arranged between the force transmission frame and the first tool (2), one end of the tensioning screw (6) is limited by the second anchor (10), and the other end of the tensioning screw (6) is fixed by a nut (11) which abuts against the second tool (3) and is screwed on the tensioning screw (6) through two side faces; during the use, first frock (2), second frock (3), first anti slippage cable clamp (4) and second anti slippage cable clamp (5) link together through treating to tear cable (1) open.
2. A cable demolition apparatus as claimed in claim 1, wherein: first frock (2) and second frock (3) are formed by two splint (20) butt joints, and two splint (20) butt joint department is done a plurality of wedge recess, and wedge clamping piece (21) are installed in the wedge recess, and the surface of wedge clamping piece (21) and waiting to tear cable (1) contact open is done the anti-skidding recess and the anti-skidding dogtooth that have alternate setting.
3. A cable demolition apparatus as claimed in claim 2, wherein: the anti-skid grooves and the anti-skid convex teeth form spiral threads.
4. A cable demolition apparatus as claimed in claim 2, wherein: and the anti-slip grooves and the anti-slip convex teeth are both provided with zinc coatings.
5. A cable demolition apparatus according to claim 3 or 4, wherein: the first anti-sliding cable clamp (4) and the second anti-sliding cable clamp (5) are formed by butt joint of two semi-ring cable clamps (41), a plurality of tooth-shaped clamping grooves are formed in the inner walls of the two semi-ring cable clamps (41), a tooth-shaped base plate (42) is installed in each tooth-shaped clamping groove, and a tooth-shaped hole is formed after the tooth-shaped base plates (42) are spliced.
6. A cable demolition apparatus as claimed in claim 5, wherein: the tooth-shaped backing plate (42) is provided with a zinc coating.
7. A cable demolition device according to claim 1 or 6, wherein: the force transmission frame (9) comprises a force transmission plate (9-1) and a force transmission column (9-2); a plurality of force transmission columns (9-2) are uniformly and fixedly connected to one side face of the force transmission plate (9-1), the length directions of the force transmission columns (9-2) are parallel to the length direction of the tensioning screw (6), the force transmission columns (9-2) are fixedly connected with the first tool (2), and the force transmission plate (9-1) is tightly jacked with the feed-through hydraulic jack (7).
8. A stay cable dismantling method is characterized in that: it includes:
firstly, assembling a clamping module and a tensioning module and clamping a cable to be disassembled, respectively arranging a first tool (2) and a second tool (3) at two sides of a cutting position of the cable (1) to be disassembled, clamping the cable (1) to be disassembled, installing a first anti-sliding cable clamp (4) at one side of the first tool (2) close to the cutting position and tightly attached to the first tool (2), installing a second anti-sliding cable clamp (5) at one side of the second tool (3) close to the cutting position and tightly attached to the second tool (3), penetrating the cable (1) to be disassembled in a tooth-shaped hole, clamping the cable (1) to be disassembled by the first anti-sliding cable clamp (4) and the second anti-sliding cable clamp (5), penetrating a tensioning screw rod (6) on the first tool (2) and the second tool (3), and respectively arranging a penetrating type hydraulic jack (7), a first anchorage device (8), a force transfer frame (9) and a second anchorage device (10) at one side of the first tool (2) far away from the cutting position of the cable (1) to be disassembled, one end of the tension screw (6) is limited through a second anchorage device (10), and the other end of the tension screw (6) is fixed through nuts (11) arranged on two sides of the second tool (3);
secondly, unloading the cable section between the tools, tensioning the tensioning screw (6) by feeding oil to the feed-through hydraulic jack (7), enabling the second tool (3) and the first tool (2) to be close to each other, loosening the cable section to be disassembled between the two tools, adjusting a second anchor (10) to be tightly attached to the first tool (2) to temporarily fix the tensioning screw (6), returning oil to the feed-through hydraulic jack (7), transferring part of cable force of the cable section between the first tool (2) and the second tool (3) to the tensioning screw (6), and finally adjusting a first anchor (8) to be tightly attached to the feed-through hydraulic jack (7);
thirdly, cutting the stay cable to be disassembled in multiple times, cutting the stay cable (1) to be disassembled in multiple times, standing for a period of time after each completion, cutting the stay cable (1) for the next time after no abnormal condition exists, reducing the section of the stay cable (1) to be disassembled along with the cutting, gradually increasing the tension of the tension screw (6) until the stay cable (1) to be disassembled is cut off, wherein the tension force borne by the tension screw (6) is the maximum, and the cable force of the cable section between the first tool (2) and the second tool (3) is completely transferred to the tension screw (6);
fourthly, unloading the residual inhaul cable, tensioning the tensioning screw (6) by feeding oil to the feed-through hydraulic jack (7), enabling the second tool (3) to be close to the first tool (2), moving the second anchor (10) for a certain distance along the tensioning screw (6) away from the first tool (2) after the second anchor (10) is loosened and separated from the first tool (2), returning oil to the feed-through hydraulic jack (7), retracting the tensioning screw (6) until the second anchor (10) is in contact with the first tool (2) again and is abutted tightly, loosening the inhaul cable respectively connected with the first tool (2) and the second tool (3) after the inhaul cable (1) is detached and cut, reducing the cable force, and adjusting the first anchor (8) to be abutted tightly against the feed-through hydraulic jack (7) again;
and fifthly, dismantling the stay cable, repeating the fourth step until the cable force of the stay cable connected with the first tool (2) and the second tool (3) respectively after the stay cable (1) to be dismantled is cut is unloaded to a specified value, then dismantling the clamping module and the tensioning module, conveying the cut stay cable to the ground or an operation platform by using hoisting equipment, and completing the construction of dismantling the stay cable.
9. A cable demolition method according to claim 8, wherein: and fifthly, monitoring the form of the peripheral structure of the fixed stay cable constantly in the process of unloading the stay cable in the fourth repeated step, stopping unloading immediately if the peripheral structure has a tendency of collapsing, taking protective measures, and continuing unloading after the peripheral structure is stable and does not collapse.
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| CN112431142A (en) * | 2020-11-17 | 2021-03-02 | 上海市基础工程集团有限公司 | Cable laying tool and process based on cutting |
| CN114150891A (en) * | 2021-12-30 | 2022-03-08 | 柳州欧维姆工程有限公司 | Inhaul cable replacing method for space cable net supporting structure |
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