CN110835864A - Intelligent inhaul cable with replaceable monitoring element and manufacturing, installing and constructing method thereof - Google Patents
Intelligent inhaul cable with replaceable monitoring element and manufacturing, installing and constructing method thereof Download PDFInfo
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- CN110835864A CN110835864A CN201810929075.6A CN201810929075A CN110835864A CN 110835864 A CN110835864 A CN 110835864A CN 201810929075 A CN201810929075 A CN 201810929075A CN 110835864 A CN110835864 A CN 110835864A
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
- D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
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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
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2301/00—Controls
- D07B2301/25—System input signals, e.g. set points
- D07B2301/259—Strain or elongation
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2301/00—Controls
- D07B2301/55—Sensors
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2301/00—Controls
- D07B2301/55—Sensors
- D07B2301/5531—Sensors using electric means or elements
- D07B2301/5577—Sensors using electric means or elements using light guides
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2015—Construction industries
- D07B2501/203—Bridges
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Abstract
An intelligent inhaul cable with replaceable monitoring elements comprises the monitoring elements and the inhaul cable, wherein the inhaul cable comprises a finished inhaul cable and a site construction installation inhaul cable, at least one pore is formed in the inhaul cable along the whole length in the longitudinal direction, the monitoring elements are arranged in the pore, and the monitoring elements are connected with the outside through data lines; the monitoring element comprises a monitoring element assembly consisting of a fiber grating sensor, a Brillouin optical fiber or vibrating wire sensor, strain gauges in other forms and a temperature and humidity sensor; the monitoring element is stretched to a design force value according to design requirements in the process of manufacturing a finished product inhaul cable, then penetrates into the pore channel, and is locked and fixed at two ends after a certain tensioning force is applied; or the inhaul cable is installed in site construction, stretched to a design force value according to design requirements, and then penetrates into the pore channel, and after a certain tensile force is applied, the two ends are locked and fixed. The intelligent inhaul cable can monitor the cable force change condition of the inhaul cable in real time, and can conveniently replace various sensor systems for monitoring the inhaul cable state in the service process.
Description
Technical Field
The invention relates to an intelligent inhaul cable, in particular to an intelligent inhaul cable with a replaceable monitoring element and a manufacturing, installing and constructing method thereof.
Background
The bridge inhaul cable plays a key role in structural stress, is extremely easy to damage due to environmental corrosion, fatigue damage, redistribution of internal force in service and the like, and the actual health condition of the inhaul cable is not easy to know under the condition that a long-acting monitoring system is not installed; the fiber grating test technology is an absolute measurement technology based on wavelength information and has the advantages of good electrical insulation, good durability, high temperature resistance, corrosion resistance and the like; the development work of intelligent inhaul cables is carried out in China as early as 2003, and a plurality of invention patent application technologies successively disclose fiber bragg grating intelligent inhaul cables for inhaul cable systems such as stayed-cable, suspender arch bridges, cable cables, suspension bridges and the like, and the intelligent inhaul cables have the function of automatically monitoring the stress of the inhaul cables; however, the above patent application technical solutions all have a common point, the fiber grating sensor and the cable are manufactured into a whole during cable production, and when the cable is stressed, the fiber grating sensor and the cable are synchronously stressed to measure the cable force; however, the optical fiber is a brittle material, and the tensile strain amount of the optical fiber after being stressed is smaller than that of steel, and the above patent application technologies all have the condition that the optical fiber fails after being implanted in a cable-making calibration process or after being used for a period of time in engineering; thus, such products have not been marketed in large quantities. According to the prior art scheme, if the monitoring element is changed into the Brillouin optical fiber, the problem that the tensile strain of the optical fiber after being stressed is smaller than that of steel is also solved; if the monitoring element is changed into a vibrating wire sensor or a strain gauge in other forms, the problem of inaccurate or invalid force measurement caused by looseness in the long-term monitoring process also exists, the monitoring element is difficult to be synchronous with the service life of the inhaul cable, and once the monitoring element is invalid or inaccurate in force measurement, the monitoring function preset in the structural part cannot play a role.
Disclosure of Invention
The invention aims to: the utility model provides an intelligence cable of interchangeable monitoring element that civil engineering structure was used, the intelligence cable of this kind of interchangeable monitoring element adopts the sensitive components and parts that can monitor the cable state of fiber grating sensor, brillouin optical fiber, vibrating wire sensor or other forms, real-time supervision cable force situation of change, can conveniently change all kinds of sensor systems that can monitor the cable state in the cable, in the in-service process, not only detectable cable force changes, still can monitor the humiture situation of change, when changing the sensor system that can monitor the cable state, still can adopt the inside corrosion conditions of endoscope observation cable body. The invention also provides a preparation and installation construction method of the intelligent inhaul cable with the replaceable monitoring element, and the preparation and installation construction method is simple and high in efficiency.
The technical scheme for solving the problems is as follows: the utility model provides an intelligent cable of interchangeable monitoring element, includes monitoring element and cable two parts, the cable includes finished product cable and site operation installation cable, its characterized in that:
the whole length of the inhaul cable along the longitudinal direction is provided with at least one pore channel, a monitoring element is arranged in the pore channel, and the monitoring element is connected with the outside through a data line;
the monitoring elements comprise a fiber bragg grating sensor monitoring element assembly, a Brillouin optical fiber monitoring element assembly, a vibrating wire sensor monitoring element assembly, strain gauges in other forms, temperature and humidity sensors or other sensitive elements capable of monitoring the state of the stay cable;
the monitoring element is stretched to a design force value according to design requirements in the process of manufacturing a finished product inhaul cable, then penetrates into the pore channel, and is locked and fixed at two ends after a certain tensioning force is applied; or the inhaul cable is installed in site construction, stretched to a design force value according to design requirements, and then penetrates into the pore channel, and after a certain tensile force is applied, the two ends are locked and fixed.
The intelligent inhaul cable with the replaceable monitoring element has the further technical scheme that: when the inhaul cable is a cold-cast steel wire finished product cable, a cold-cast extrusion type steel strand finished product cable or an extrusion type steel strand finished product cable, at least one pore channel is formed in each finished product cable along the longitudinal direction in an overall length mode, the monitoring element is used for penetrating through the pore channels after the cold-cast steel wire finished product cable, the cold-cast extrusion type steel strand finished product cable or the extrusion type steel strand finished product cable is stretched to a design force value according to design requirements in the finished product inhaul cable manufacturing process, and a carrier of the monitoring element is fixed after being stressed; the cold-cast steel wire finished product cable intelligent inhaul cable, the cold-cast steel strand finished product intelligent inhaul cable or the extrusion type steel strand finished product cable intelligent inhaul cable which form the replaceable monitoring element.
The further technical scheme of the intelligent inhaul cable with the replaceable monitoring element is as follows: the inhaul cable is a clip type steel strand inhaul cable installed in site construction, at least one through hole is reserved in anchorage devices at two ends of the clip type steel strand inhaul cable along the whole length of the longitudinal direction, at least one pore channel is reserved in the inhaul cable body along the whole length of the longitudinal direction, and the monitoring element penetrates through the through hole and the pore channel and is connected with the outside through a data line;
the monitoring element is constructed, when the work of strand pulling, tensioning and cable adjusting is finished, the monitoring element is inserted into the clip type strand inhaul cable, and the carrier of the monitoring element is fixed after being stressed; constitute the intelligent cable of clip formula steel strand wires cable of interchangeable monitoring element.
The intelligent inhaul cable with the replaceable monitoring element is characterized in that the further technical scheme is as follows: the monitoring element is a fiber grating sensor monitoring element component, the fiber grating sensor monitoring element component comprises a carrier, an optical fiber and a nut, at least one groove is longitudinally arranged on the carrier, the optical fiber is placed in the groove, a grating is engraved on the optical fiber, and the fiber grating and the carrier are reliably coupled in the groove.
The intelligent inhaul cable with the replaceable monitoring element is further characterized in that: the monitoring element is a Brillouin optical fiber monitoring element assembly, the Brillouin optical fiber monitoring element assembly comprises a carrier, an optical fiber and a nut, at least one groove is formed in the carrier along the longitudinal direction, the optical fiber is placed in the groove, and the Brillouin optical fiber is reliably coupled with the carrier through an adhesive or a crimping method.
The intelligent inhaul cable with the replaceable monitoring element is further characterized in that: the monitoring element is a vibrating wire sensor monitoring element assembly which comprises a carrier, a vibrating wire sensor and a nut, wherein at least one groove is longitudinally formed in the carrier, the vibrating wire sensor is placed in the groove, and two ends of the vibrating wire sensor are welded and fixed.
The intelligent inhaul cable with the replaceable monitoring element has the further technical scheme that: the carrier is a steel wire or a carbon fiber rod or a glass fiber rod or a hybrid fiber rod.
In the anchoring area of the stay cable, the pore channel is a steel pipe, a plastic pipe or other pipes with enough strength, and the cable body part of the stay cable is a tubular space or a plastic pipe formed by a spiral steel wire pipe and a steel belt with enough telescopic functions.
The diameter of the pore canal is 1 mm-20 mm, and the cross section of the pore canal is polygonal, elliptical, circular or elliptical ring.
Another related technical scheme is as follows: a preparation and installation construction method of a dragline with a replaceable monitoring element is a preparation and installation construction method of a cold-cast steel wire finished product cable intelligent dragline, a cold-cast steel strand finished product cable intelligent dragline or an extrusion type steel strand finished product cable intelligent dragline of the replaceable monitoring element, and comprises the following steps:
A. construction preparation:
a1, preparing materials:
① preparing stay cable and other parts of anchor according to the materials required by conventional cold-cast steel wire finished cable, cold-cast extrusion steel strand finished cable or extrusion steel strand finished cable;
② preparing monitoring element and making hole-forming pipe material;
a2, blanking: carrying out fixed-length blanking on a steel wire or a steel strand for manufacturing a cable and a pore-forming pipeline material according to the length of the cable and the working condition;
B. twisting and wrapping: the steel wires or steel strands are tightly arranged with twisting angles according to the requirements of inhaul cables of different types, the pore-forming pipeline is placed in the steel wires or steel strands, and the steel wires or steel strands are tightly wound by a winding belt;
C. extrusion molding: carrying out external hot extrusion on HDPE (high-density polyethylene) by using the wrapped steel wire or steel strand bundle;
D. cutting the rope at fixed length: calculating the length of the rope according to the engineering requirement, and cutting the rope;
E. anchor manufacturing: aligning the pore canal in the cable body with the pore canal in the anchorage device, connecting the pore canals by using a heat-shrinkable tube or an inserting tube and the like, and anchoring the rest of the pore canals by a conventional method according to the form of the anchorage device;
F. ultra-tensioning: tensioning a finished cable according to standard requirements;
G. packaging and transporting to a construction site, and hanging and tensioning to a designed cable force;
H. installing a monitoring element: penetrating a carrier provided with a monitoring element assembly consisting of one of a fiber bragg grating sensor monitoring element assembly, a Brillouin fiber monitoring element assembly and a vibrating wire sensor monitoring element assembly and strain gauges in other forms, temperature and humidity sensors or other sensitive elements capable of monitoring the state of the stay cable into a reserved hole of the stay cable, and fixing two ends of the carrier by nuts;
I. connecting: connecting the detection end wire with a measuring instrument;
J. tensioning the carrier: tensioning the carrier to a set force value, wherein the force value is between the difference value of the actual force value and the minimum possible force value of the stay cable and the actual force value; locking the nut on an anchor plate or a wire separating plate of the stay cable, or locking the nut on the end cover surface of an anchor of the stay cable;
K. cable adjustment: the full-bridge circulation adjusts the stress of each guy cable;
l, protection: and (4) mounting anchor protecting devices at two ends of the stay cable.
The other related technical scheme is that: the manufacturing and installation construction method of the clamping piece type steel strand inhaul cable intelligent inhaul cable with the replaceable monitoring element is characterized by comprising the following steps:
A. construction preparation:
a1, preparing materials:
① preparing other parts of the anchor according to the requirements of conventional clip-type steel strand group anchor;
② preparing monitoring element and making hole-forming pipe material;
a2, blanking: steel wires or steel strands for manufacturing cables and pore-forming pipeline materials are subjected to fixed-length blanking according to cable length and working conditions;
B. installing an upper anchor and a lower anchor: at least one through hole is reserved in the anchorage devices at the two ends of the clip type steel strand inhaul cable, a rigid pore-forming pipeline consisting of a steel pipe, a plastic pipe or other pipes with enough strength is arranged in the through hole, and the rest installation is carried out according to a conventional method;
C. installing an HDPE protective sleeve:
D. placing a pore-forming pipeline and tensioning a single steel strand hanging rope:
placing flexible pore-forming pipeline with enough telescopic function made of tubular space formed by spiral steel wire pipe and steel band or transparent plastic pipe in the cable body, connecting with rigid pore-forming pipeline previously placed in the centre of upper and lower anchors, and conventionally mounting the rest, and hanging and tensioning steel strands one by one;
E. integral tensioning and cable adjusting: the preparation method comprises the following steps of (1) carrying out the preparation according to a conventional method;
F. installing a monitoring element: a carrier provided with a monitoring element assembly which comprises one of a fiber bragg grating sensor monitoring element assembly, a Brillouin fiber monitoring element assembly and a vibrating wire sensor monitoring element assembly and a strain gauge in other forms, a temperature and humidity sensor or other sensitive elements capable of monitoring the state of a stay cable is penetrated into the other end by an anchorage device at one end and is fixed by a nut;
G. tensioning the carrier to a set force value and then locking the nut; the force value is between the difference value of the actual force value of the inhaul cable and the minimum possible force value and the actual force value;
H. installing a cable hoop shock absorber;
I. circularly adjusting the stress of each stay cable;
J. and (4) mounting anchor protecting devices at two ends of the stay cable.
Due to the adoption of the structure, the intelligent inhaul cable with the replaceable monitoring element and the preparation, installation and construction method thereof have the following beneficial effects:
1. when the cable is overhauld in the service period, need not to break off the traffic and can change monitoring element to can detect and protect the cable internal conditions, make things convenient for the operation management to support:
because at least one pore channel 2 is reserved in the intelligent inhaul cable of the replaceable monitoring element along the longitudinal direction in the whole length, the monitoring element 3 is arranged in the pore channel 2, when in construction, a finished inhaul cable or an on-site construction installation inhaul cable is stretched to a design force value according to the design requirement, then the monitoring element penetrates into the pore channel, and the two ends are fixed, so that the monitoring element 3 can be conveniently taken out at any time, and the internal condition of the inhaul cable can be checked by utilizing the pore channel 2 and adopting an inward looking technology; when the humidity in the stay cable body exceeds the standard, the pore passage 2 can be used as a channel for introducing dry air to remove the moisture in the cable body, and moreover, inert gas can be introduced or vacuum pumping can be performed to protect the stress reinforcement of the cable body.
2. The intelligent inhaul cable with the replaceable monitoring element has long service life, and can be synchronous with the service life of the inhaul cable:
in the prior art, in the manufacturing process of the intelligent inhaul cable, a monitoring element and the inhaul cable are used for manufacturing the inhaul cable together, synchronous installation and synchronous stress are adopted, and the survival rate of the system cannot be guaranteed because the stress borne by the adopted detection element is smaller than that of the inhaul cable material; secondly, due to the mode that the monitoring element and the inhaul cable are used for manufacturing the inhaul cable together, and the monitoring element is fixed inside the inhaul cable or fixedly connected with the inhaul cable, when the monitoring element fails, the monitoring element cannot be replaced;
the intelligent inhaul cable with the replaceable monitoring element is provided with at least one hole 2 along the longitudinal direction in a whole length manner, the hole 2 is internally provided with the monitoring element 3, when in construction, a finished inhaul cable or an on-site construction installation inhaul cable is stretched to a design force value according to design requirements, then the monitoring element penetrates into the hole, and two ends of the monitoring element are fixed; the installation construction method can ensure that the monitoring element can survive 100% effectively; in addition, the monitoring element is applied with tension locking, the strain of the monitoring element is not less than the difference value between the actually measured strain value of the inhaul cable and the minimum possible strain value of the inhaul cable, therefore, the monitoring element can monitor the inhaul cable stress in a higher strain state under a lower strain level, and the service life of the monitoring element is prolonged; and can be replaced at any time, and the service life of the stay rope is synchronous with that of the stay rope.
3. Transportation, construction simple to operate:
the hole-forming pipelines of finished cables such as a cold-cast steel wire finished cable intelligent cable, a cold-cast extrusion type steel strand finished cable intelligent cable, an extrusion type steel strand finished cable intelligent cable and the like which are manufactured in a factory and can replace monitoring elements in service are tubular spaces formed by steel wires or steel belts with spirals, as shown in figures 6 and 7, the finished cables can be coiled together with the cables and are stressed and extended together, and the finished cables are convenient to transport, construct and install; the pore passage can also be a transparent plastic pipe, and the strip pipe or the plastic pipe can also be perforated on the pipe wall to be used as a vent hole, so that the operation of pipe cultivation is facilitated.
The technical features of the intelligent inhaul cable with the replaceable monitoring element and the manufacturing, installing and constructing method thereof are further described below with reference to the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of a chilled cast steel wire finished product cable intelligent inhaul cable and a chilled cast extruded steel strand finished product cable intelligent inhaul cable with replaceable monitoring elements;
FIG. 2 is a schematic view of a monitoring element;
FIG. 3 is a right side view of FIG. 2;
FIG. 4 is a schematic structural diagram of an intelligent inhaul cable of a finished extruded steel strand cable with a replaceable monitoring element;
FIG. 5 is a schematic structural view of a clip type steel strand cable intelligent cable with replaceable monitoring elements;
FIG. 6 is a schematic structural view of a spiral steel wire pipe pore-forming pipeline with sufficient telescopic function;
FIG. 7 is a schematic view of a tubular space-forming duct formed by a steel strip having vent holes therein;
FIG. 8 is a schematic structural view of a monitoring element assembly with a fiber grating and a temperature and humidity sensor mounted thereon;
FIG. 9 is a schematic view of a monitoring element assembly with a Brillouin optical fiber mounted thereon;
FIG. 10 is a right side view of FIG. 9;
figure 11 is a schematic view of a monitoring element assembly with vibrating wire sensors mounted thereon,
FIG. 12 is a right side view of FIG. 11;
FIG. 13 is a schematic cross-sectional view of an intelligent inhaul cable body of a finished steel wire cable with a replaceable monitoring element according to the present invention (with 1 hole in the center of the inhaul cable body);
FIG. 14 is one of schematic cross-sectional structural views of an intelligent inhaul cable body of a steel strand finished cable with a replaceable monitoring element according to the present invention (with 1 hole in the center of the inhaul cable body);
fig. 15 and 17 are second schematic sectional views (3 holes are formed in the cable body) of the intelligent cable body of the steel wire finished cable with the replaceable monitoring element according to the present invention;
fig. 16 and 18 are second schematic sectional structural views (2 holes are formed in the cable body) of the intelligent cable body of the steel strand finished cable with the replaceable monitoring element according to the invention;
FIG. 19: the invention relates to a cold-cast steel wire finished cable intelligent inhaul cable and a cold-cast extrusion type steel strand finished cable intelligent inhaul cable with replaceable monitoring elements.
In the figure:
1-stay cable, 1 a-chill casting type steel wire finished product cable intelligent stay cable or chill casting extrusion type steel strand finished product cable intelligent stay cable, 1 b-extrusion type steel strand finished product cable intelligent stay cable, 1 c-clip type steel strand intelligent stay cable; 2-pore channel, 21-spiral steel wire tube pore-forming pipeline, 22-steel band pore-forming pipeline with vent hole, 221-vent hole;
3-a monitoring element; 4-a nut; 5-thread; 6-groove, 7-carrier, 8-grating, 9-optical fiber and 10-viscose glue;
11-data line, 12-temperature and humidity sensor, 13-reserved hole; 14-steel wire, 15-steel wire finished product cable outer PE sleeve, 16-steel strand, 17-steel strand finished product cable outer PE sleeve;
18-brillouin optical fiber, 19-vibrating wire sensor.
Detailed Description
The intelligent inhaul cable with the replaceable monitoring element comprises the monitoring element and the inhaul cable, wherein the inhaul cable comprises a finished inhaul cable and a site construction installation inhaul cable, at least one hole channel 2 is reserved in the inhaul cable 1 along the whole length in the longitudinal direction, a monitoring element 3 is arranged in the hole channel 2, and the monitoring element 3 is connected with the outside through a data line 11;
the monitoring element 3 comprises a fiber bragg grating sensor monitoring element assembly, a Brillouin optical fiber monitoring element assembly, a vibrating wire sensor monitoring element assembly and a monitoring element assembly consisting of strain gauges in other forms, a temperature and humidity sensor or other sensitive elements capable of monitoring the state of the stay cable;
the monitoring element can be a tension element which is stretched to a design force value according to the design requirement in the process of manufacturing the finished product inhaul cable, then penetrates into the pore channel 2, and is locked and fixed at two ends after a certain tension force is applied; or the inhaul cable can be installed in site construction, stretched to a design force value according to design requirements, and then penetrates into the hole channel 2, and after a certain tensile force is applied, the two ends are locked and fixed.
The structural characteristics of the cable are further explained according to whether the cable is a finished cable or a field construction installation cable in combination with the attached drawings.
Example one
A cold-cast steel wire finished product cable intelligent inhaul cable and a cold-cast extrusion type steel strand finished product cable intelligent inhaul cable of a replaceable monitoring element manufactured in a factory are disclosed:
as shown in fig. 1, the inhaul cable is a cold-cast finished steel wire cable or a cold-cast extruded steel strand finished cable, a hole 2 is reserved in the center of the cold-cast finished steel wire cable or the cold-cast extruded steel strand finished cable in the whole length,
a monitoring element 3 is arranged in the pore canal 2, and the monitoring element 3 is connected with the outside through a data line 11;
as shown in fig. 2, the monitoring element 3 comprises a steel wire 7 as a carrier, an optical fiber 9, and a nut 4, wherein at least one groove 6 is longitudinally arranged on the carrier 7, the optical fiber 9 is placed in the groove (see fig. 3), a grating 8 is engraved on the optical fiber, and the fiber grating and the carrier are reliably coupled in the groove by using a durable adhesive or a mechanical crimping method;
when the monitoring element 3 is manufactured, when a cold-cast steel wire finished product cable and a cold-cast extrusion type steel strand finished product cable are stretched to a design force value according to design requirements, the cold-cast extrusion type steel strand finished product cable penetrates through the pore channel 2, and a steel wire 7 of a carrier of the monitoring element 3 is fixed after being stressed; the cold-cast steel wire finished product cable intelligent cable or cold-cast extrusion type steel strand finished product cable intelligent cable 1a (the structure of the cold-cast steel wire finished product cable is shown in figure 1, and the cross-sectional view of the cable body is shown in figures 13 and 14) forming the replaceable monitoring element.
As a transformation of the first embodiment of the invention, the basic structures of the extruded steel strand finished product cable manufactured by the extruded steel strand finished product cable and the intelligent cable 1a of the cold-cast extruded steel strand finished product cable of the first embodiment are the same, a hole 2 is reserved in the center of the intelligent cable 1b of the extruded steel strand finished product cable in the whole length direction, a monitoring element 3 is arranged in the hole 2, and the monitoring element 3 is connected with the outside through a data line 11; the monitoring element 3 is shown in fig. 2, when the monitoring element 3 is manufactured, when a finished extruded steel strand cable is stretched to a design force value according to design requirements, the finished extruded steel strand cable penetrates through the hole 2, and the carrier 7 of the monitoring element 3 is fixed after being stressed; the extrusion type steel strand finished cable intelligent inhaul cable 1b (see fig. 4) forming the replaceable monitoring element.
The structural schematic diagrams of the cable bodies of the intelligent inhaul cables of the various replaceable monitoring elements are shown in fig. 13 and fig. 14, fig. 13 is a schematic diagram of the section structure of the intelligent inhaul cable body of the steel wire finished cable of the replaceable monitoring element, and fig. 14 is a schematic diagram of the section structure of the intelligent inhaul cable body of the steel strand finished cable of the replaceable monitoring element.
The manufacturing, mounting and constructing method of the cold-cast steel wire finished product cable intelligent inhaul cable and the cold-cast extrusion type steel strand finished product cable intelligent inhaul cable which are manufactured in a factory and can replace monitoring elements in service comprises the following steps:
A. construction preparation:
a1, preparing materials:
① preparing stay cable and other parts of anchor according to the materials required by conventional cold-cast steel wire finished cable, cold-cast extrusion steel strand finished cable or extrusion steel strand finished cable;
② preparing monitoring elements and making hole-forming pipe material (see FIG. 2);
a2, blanking: carrying out fixed-length blanking on a steel wire or a steel strand for manufacturing a cable and a pore-forming pipeline material according to the length of the cable and the working condition;
B. twisting and wrapping: placing the pore-forming pipeline at the center, tightly arranging steel wires or steel strands with twisting angles according to requirements of inhaul cables of different types, and tightly winding the steel wires or the steel strands with winding belts;
C. extrusion molding: carrying out external hot extrusion on HDPE (high-density polyethylene) by using the wrapped steel wire or steel strand bundle;
D. cutting the rope at fixed length: calculating the length of the rope according to the engineering requirement, and cutting the rope;
E. anchor manufacturing: aligning the central hole-forming pipeline with the end surface of the anchorage device;
F. ultra-tensioning: tensioning a finished cable according to standard requirements;
G. packaging and transporting to a construction site, and hanging and tensioning to a designed cable force;
H. installing a monitoring element: penetrating the carrier with the fiber grating sensor and the temperature and humidity sensor into a preformed hole in the center of the inhaul cable, and fixing two ends of the inhaul cable by nuts;
I. connecting: connecting the detection end wire with a measuring instrument;
J. tensioning the carrier: tensioning the carrier to the designed minimum stress of the stay cable, and locking the nut on an anchor plate of the stay cable (see figure 1) or locking the nut on an end cover surface of an anchor of the stay cable (see figure 19);
K. cable adjustment: the full-bridge circulation adjusts the stress of each guy cable;
l, protection: and (4) mounting anchor protecting devices at two ends of the stay cable.
Example two
An intelligent inhaul cable with replaceable monitoring elements, namely a clip type steel strand inhaul cable, which is installed in site construction:
a through hole is reserved in the center of an anchorage device at two ends of a clip type steel strand inhaul cable, a pore channel 2 is reserved in the whole length of the center of an inhaul cable body, and a monitoring element 3 penetrates through the through hole and the pore channel and is connected with the outside through a data line 11;
as shown in fig. 2, the monitoring element 3 includes a carrier 7, an optical fiber 9, and a nut 4, at least one groove 6 is longitudinally disposed on the carrier 7, the optical fiber 9 is disposed in the groove (see fig. 3), a grating 8 is engraved on the optical fiber, and the optical fiber grating is adhered to the carrier groove;
when the monitoring element 3 is constructed, after the work of strand pulling, tensioning, cable adjusting and the like is finished, the monitoring element is penetrated into the clip type strand inhaul cable, and the carrier 7 of the monitoring element 3 is fixed after being stressed; the intelligent stay cable of the clip type steel strand stay cable (see figure 5) which forms the replaceable monitoring element.
The invention relates to a preparation process of an intelligent inhaul cable with replaceable monitoring elements, namely a clamping piece type steel strand inhaul cable, which is installed in site construction, and comprises the following steps:
A. construction preparation:
a1, preparing materials:
① preparing other parts of the anchor according to the requirements of conventional clip-type steel strand group anchor;
② preparing monitoring elements (see FIG. 2) and making the hole-forming pipe material;
a2, blanking: carrying out fixed-length blanking on a steel wire or a steel strand for manufacturing a cable and a pore-forming pipeline material according to the length of the cable and the working condition;
B. installing an upper anchor and a lower anchor: reserving a through hole in the center of the anchorage devices at two ends of the clip type steel strand inhaul cable, placing a rigid pore-forming pipeline consisting of a steel pipe, a plastic pipe or other pipes with enough strength in the hole, and installing the rest parts according to a conventional method;
C. installing an HDPE protective sleeve:
D. placing a pore-forming pipeline and tensioning a single steel strand hanging rope:
placing a flexible pore-forming pipeline with enough telescopic function made of a tubular space formed by a spiral steel wire pipe and a steel strip or a transparent plastic pipe at the center of a cable body, connecting the flexible pore-forming pipeline with a rigid pore-forming pipeline previously placed at the center of an anchorage device at the upper end and the lower end, placing a single steel strand around the flexible pore-forming pipeline, and tensioning the flexible pore-forming pipeline one by one;
E. integral tensioning and cable adjusting: the preparation method comprises the following steps of (1) carrying out the preparation according to a conventional method;
F. installing a monitoring element: a monitoring element consisting of a carrier which is well pasted with a fiber grating sensor and a temperature and humidity sensor is penetrated into the other end by an anchorage device at one end and is fixed by a nut;
G. tensioning the monitoring element carrier, locking nut (see fig. 5);
H. installing a cable hoop shock absorber;
I. circularly adjusting the stress of each stay cable;
J. and (4) mounting anchor protecting devices at two ends of the stay cable.
In the above embodiments, the carrier 7 of the monitoring element may be a steel wire or a carbon fiber rod or a glass fiber rod with the same diameter or other ribs capable of being grooved in the longitudinal direction, such as a hybrid fiber rod.
In each embodiment, the pore passage is divided into a rigid pore passage and a flexible pore passage, and in the anchoring area of the inhaul cable, the pore passage is a steel pipe, a plastic pipe or other pipes with enough strength, so that the influence of the reserved pore passage on the anchoring performance is avoided; the cable body part of the inhaul cable is a tubular space or a transparent plastic pipe formed by a spiral steel wire pipe and a steel belt with enough telescopic functions, so that the monitoring element for pipeline collapse extrusion caused by the fact that the inhaul cable is stressed to be telescopic is avoided.
In order to reduce the influence on the outer diameter of the cable body and facilitate the penetration of the monitoring element, the diameter of the pore channel is 1-20 mm, and the cross section of the pore channel is polygonal (including rectangular, square and hexagonal), elliptical, circular or elliptical ring (runway type).
As a variation of the first embodiment and the second embodiment of the present invention, the number of the holes 2 arranged in the cable 1 along the entire length of the longitudinal direction may be more than 1, and may be 2, 3, 4, 5 or more, and the positions of the holes 2 may be in the center of the cable 1 or in other positions of the cable according to the diameter and the requirement of the cable, see fig. 15, 16, 17 and 18, where in fig. 15 and 17, there are 3 holes in the cable body, and in fig. 15, 1 is in the center of the cable 1, and the other two are symmetrically on both sides; in fig. 17, 1 is located at the center of the cable 1, and the other two are symmetrically located at two sides; in fig. 16 and 18, 2 holes are formed in the stay cable body, wherein 1 in fig. 16 is positioned in the center of the stay cable 1, and the other 1 is positioned at the edge of the stay cable body; in fig. 18, 2 holes are all located at the edge of the stay cable body.
As a variation of the first embodiment and the second embodiment of the present invention, the monitoring element assembly may also be a monitoring element assembly composed of a brillouin optical fiber monitoring element assembly, a vibrating wire sensor monitoring element assembly, and a strain gauge in other forms, a temperature and humidity sensor, or other sensitive components capable of monitoring the state of the guy cable;
fig. 9 and 10 are schematic structural views of monitoring element assemblies mounted with brillouin optical fibers;
FIGS. 11 and 12 are schematic structural views of a monitoring element assembly with a vibrating wire sensor mounted thereon;
other types of strain gauges, temperature and humidity sensors, or other methods for mounting sensitive components capable of monitoring the state of the cable are within the reach of those skilled in the art, and are not described herein.
Claims (11)
1. The utility model provides an intelligent cable of interchangeable monitoring element, includes monitoring element and cable two parts, the cable includes finished product cable and site operation installation cable, its characterized in that:
the full length of the inhaul cable (1) along the longitudinal direction is provided with at least one pore channel (2), a monitoring element (3) is arranged in the pore channel (2), and the monitoring element (3) is connected with the outside through a data line (11);
the monitoring element (3) comprises a fiber grating sensor monitoring element assembly, a Brillouin fiber monitoring element assembly, a vibrating wire sensor monitoring element assembly and other strain gauges, temperature and humidity sensors or other sensitive elements capable of monitoring the state of the stay cable;
the monitoring element is stretched to a design force value according to design requirements in the process of manufacturing a finished product inhaul cable, then penetrates into the pore channel (2), and is locked and fixed at two ends after a certain tensioning force is applied; or the inhaul cable is installed in site construction, stretched to a design force value according to design requirements, and then penetrates into the hole channel (2), and after a certain tensile force is applied, the two ends are locked and fixed.
2. A smart cable for a replaceable monitoring element as claimed in claim 1, wherein: when the inhaul cable is a cold-cast steel wire finished product cable, a cold-cast extrusion type steel strand finished product cable or an extrusion type steel strand finished product cable, at least one pore channel (2) is arranged in each finished product cable along the longitudinal direction in an overall length mode, the monitoring element (3) penetrates through the pore channel (2) after being stretched to a design force value according to design requirements in the finished product inhaul cable manufacturing process, and a carrier (7) of the monitoring element (3) is fixed after being stressed; the cold-cast steel wire finished product cable intelligent inhaul cable, the cold-cast steel strand finished product intelligent inhaul cable or the extrusion type steel strand finished product cable intelligent inhaul cable which form the replaceable monitoring element.
3. A smart cable for a replaceable monitoring element as claimed in claim 1, wherein: the inhaul cable is a clip type steel strand inhaul cable installed in site construction, at least one through hole is reserved in anchorage devices at two ends of the clip type steel strand inhaul cable along the whole length of the longitudinal direction, at least one pore (2) is reserved in the inhaul cable body along the whole length of the longitudinal direction, and the monitoring element (3) penetrates through the through hole and the pore and is connected with the outside through a data line (11);
the monitoring element (3) is penetrated into the clamping piece type steel strand inhaul cable after finishing the operations of strand penetrating, tensioning and cable adjusting during construction, and a carrier (7) of the monitoring element (3) is fixed after being stressed; constitute the intelligent cable of clip formula steel strand wires cable of interchangeable monitoring element.
4. A smart cable for a replaceable monitoring element as claimed in claim 1, 2 or 3, wherein: the monitoring element is a fiber grating sensor monitoring element component, the fiber grating sensor monitoring element component comprises a carrier (7), an optical fiber (9) and a nut (4), at least one groove (6) is longitudinally formed in the carrier, the optical fiber is placed in the groove, a grating (8) is carved on the optical fiber, and the fiber grating and the carrier are reliably coupled in the groove.
5. A smart cable for a replaceable monitoring element as claimed in claim 1, 2 or 3, wherein: the monitoring element is a Brillouin optical fiber monitoring element assembly, the Brillouin optical fiber monitoring element assembly comprises a carrier (7), an optical fiber (9) and a nut (4), at least one groove (6) is formed in the carrier along the longitudinal direction, the optical fiber is placed in the groove and is reliably coupled with the carrier (7) through an adhesive or compression joint, and threads (5) are arranged at two ends of the carrier (7).
6. A smart cable for a replaceable monitoring element as claimed in claim 1, 2 or 3, wherein: the monitoring element is a vibrating wire sensor monitoring element assembly which comprises a carrier (7), a vibrating wire sensor (19) and a nut (4), wherein at least one groove (6) is longitudinally formed in the carrier, the vibrating wire sensor is placed in the groove, and two ends of the vibrating wire sensor are welded and fixed.
7. A smart cable for a replaceable monitoring element as claimed in claim 1, 2 or 3, wherein: the carrier (7) is a steel wire or a carbon fiber rod or a glass fiber rod or a hybrid fiber rod.
8. A smart cable for a replaceable monitoring element as claimed in claim 1, 2 or 3, wherein: in the anchoring area of the stay cable, the pore channel is a steel pipe, a plastic pipe or other pipes with enough strength, and the cable body part of the stay cable is a tubular space or a plastic pipe formed by a spiral steel wire pipe and a steel belt with enough telescopic functions.
9. A smart cable for a replaceable monitoring element as claimed in claim 1, 2 or 3, wherein: the diameter of the pore canal is 1 mm-20 mm, and the cross section of the pore canal is polygonal, elliptical, circular or elliptical ring.
10. A preparation and installation construction method of a dragline with a replaceable monitoring element, which is the preparation and installation construction method of the cold-cast steel wire finished product cable intelligent dragline, the cold-cast steel stranded wire finished product cable intelligent dragline or the extrusion type steel stranded wire finished product cable intelligent dragline with the replaceable monitoring element in claim 2, is characterized by comprising the following steps:
A. construction preparation:
a1, preparing materials:
① preparing stay cable and other parts of anchor according to the materials required by conventional cold-cast steel wire finished cable, cold-cast extrusion steel strand finished cable or extrusion steel strand finished cable;
② preparing monitoring element and making hole-forming pipe material;
a2, blanking: carrying out fixed-length blanking on a steel wire or a steel strand for manufacturing a cable and a pore-forming pipeline material according to the length of the cable and the working condition;
B. twisting and wrapping: the steel wires or steel strands are tightly arranged with twisting angles according to the requirements of inhaul cables of different types, the pore-forming pipeline is placed in the steel wires or steel strands, and the steel wires or steel strands are tightly wound by a winding belt;
C. extrusion molding: carrying out external hot extrusion on HDPE (high-density polyethylene) by using the wrapped steel wire or steel strand bundle;
D. cutting the rope at fixed length: calculating the length of the rope according to the engineering requirement, and cutting the rope;
E. anchor manufacturing: aligning the pore canal in the cable body with the pore canal in the anchorage device, connecting the pore canals by using a heat-shrinkable tube or an inserting tube and the like, and anchoring the rest of the pore canals by a conventional method according to the form of the anchorage device;
F. ultra-tensioning: tensioning a finished cable according to standard requirements;
G. packaging and transporting to a construction site, and hanging and tensioning to a designed cable force;
H. installing a monitoring element: penetrating a carrier provided with a monitoring element assembly consisting of one of a fiber bragg grating sensor monitoring element assembly, a Brillouin fiber monitoring element assembly and a vibrating wire sensor monitoring element assembly and strain gauges in other forms, temperature and humidity sensors or other sensitive elements capable of monitoring the state of the stay cable into a reserved hole of the stay cable, and fixing two ends of the carrier by nuts;
I. connecting: connecting the detection end wire with a measuring instrument;
J. tensioning the carrier: tensioning the carrier to a set force value, wherein the force value is between the difference value of the actual force value and the minimum possible force value of the stay cable and the actual force value; locking the nut on an anchor plate or a wire separating plate of the stay cable, or locking the nut on the end cover surface of an anchor of the stay cable;
K. cable adjustment: the full-bridge circulation adjusts the stress of each guy cable;
l, protection: and (4) mounting anchor protecting devices at two ends of the stay cable.
11. A preparation and installation construction method of a cable with a replaceable monitoring element is the preparation and installation construction method of the intelligent cable of the clip type steel strand cable with the replaceable monitoring element in claim 3, and is characterized by comprising the following steps:
A. construction preparation:
a1, preparing materials:
① preparing other parts of the anchor according to the requirements of conventional clip-type steel strand group anchor;
② preparing monitoring element and making hole-forming pipe material;
a2, blanking: steel wires or steel strands for manufacturing cables and pore-forming pipeline materials are subjected to fixed-length blanking according to cable length and working conditions;
B. installing an upper anchor and a lower anchor: reserving at least one through hole in anchorage devices at two ends of the clip type steel strand inhaul cable, and carrying out the rest installation according to a conventional method;
C. installing an HDPE protective sleeve:
D. laying a pore-forming pipeline and connecting the pore-forming pipeline with the through hole of the anchor plate, and then tensioning the single hanging rope of the steel strand:
placing a flexible pore-forming pipeline which is made of a tubular space formed by a spiral steel wire pipe and a steel belt, a segmented plastic pipe or a transparent plastic pipe and has a sufficient telescopic function in a cable body, connecting the flexible pore-forming pipeline with the through holes of the anchors at the upper end and the lower end, and installing the rest of the flexible pore-forming pipeline according to a conventional method, wherein steel strands are hung and tensioned one by one;
E. integral tensioning and cable adjusting: the preparation method comprises the following steps of (1) carrying out the preparation according to a conventional method;
F. installing a monitoring element: a carrier provided with a monitoring element assembly which comprises one of a fiber bragg grating sensor monitoring element assembly, a Brillouin fiber monitoring element assembly and a vibrating wire sensor monitoring element assembly and a strain gauge in other forms, a temperature and humidity sensor or other sensitive elements capable of monitoring the state of a stay cable is penetrated into the other end by an anchorage device at one end and is fixed by a nut;
G. tensioning the carrier to a set force value and then locking the nut; the force value is between the difference value of the actual force value of the inhaul cable and the minimum possible force value and the actual force value;
H. installing a cable hoop shock absorber;
I. circularly adjusting the stress of each stay cable;
J. and (4) mounting anchor protecting devices at two ends of the stay cable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810929075.6A CN110835864A (en) | 2018-08-15 | 2018-08-15 | Intelligent inhaul cable with replaceable monitoring element and manufacturing, installing and constructing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810929075.6A CN110835864A (en) | 2018-08-15 | 2018-08-15 | Intelligent inhaul cable with replaceable monitoring element and manufacturing, installing and constructing method thereof |
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| CN110835864A true CN110835864A (en) | 2020-02-25 |
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| CN113340223A (en) * | 2021-06-02 | 2021-09-03 | 桂林理工大学 | Fiber grating strain sensor with adjustable measuring range and preparation and use methods thereof |
| CN114526685A (en) * | 2022-02-15 | 2022-05-24 | 柳州欧维姆机械股份有限公司 | Replaceable fiber grating intelligent inhaul cable and replacement method thereof |
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| 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 |
| CN111442735B (en) * | 2020-04-03 | 2022-05-31 | 广西大学 | Method for manufacturing polymer rubber-insulated-wire fiber grating strain sensor and intelligent cable |
| CN111424552A (en) * | 2020-04-08 | 2020-07-17 | 山东交通学院 | Continuous section corrugated pipe connecting device for continuous T-beam bridge pier top and using method |
| CN112854775A (en) * | 2021-01-08 | 2021-05-28 | 王蔚 | Steel wire structure |
| CN113340223A (en) * | 2021-06-02 | 2021-09-03 | 桂林理工大学 | Fiber grating strain sensor with adjustable measuring range and preparation and use methods thereof |
| CN113340223B (en) * | 2021-06-02 | 2022-12-09 | 桂林理工大学 | Fiber grating strain sensor with adjustable measuring range and preparation and use methods thereof |
| CN114526685A (en) * | 2022-02-15 | 2022-05-24 | 柳州欧维姆机械股份有限公司 | Replaceable fiber grating intelligent inhaul cable and replacement method thereof |
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Inventor after: Zhu Wanxu Inventor after: Zhou Hongmei Inventor after: Pang Xizhong Inventor after: Liang Shiyuan Inventor after: Zhu Shicong Inventor before: Zhu Wanxu Inventor before: Zhou Hongmei Inventor before: Pang Xizhong |
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Effective date of registration: 20200618 Address after: 541004 the Guangxi Zhuang Autonomous Region Guilin Construction Road No. 12 Applicant after: GUILIN University OF TECHNOLOGY Applicant after: LIUZHOU HANXIMING BUILDING MATERIAL DEVELOPMENT Co.,Ltd. Address before: 545616 No. 5-17, Third Training Building, Lushan College, Guangxi University of Science and Technology, 99 Xinliu Avenue, Liuzhou City, Guangxi Zhuang Autonomous Region Applicant before: LIUZHOU HANXIMING BUILDING MATERIAL DEVELOPMENT Co.,Ltd. |