CN118329614B - Detection method and device for anchor head assembly in safety pressure dispersion anchor cable - Google Patents
Detection method and device for anchor head assembly in safety pressure dispersion anchor cable Download PDFInfo
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- CN118329614B CN118329614B CN202410372089.8A CN202410372089A CN118329614B CN 118329614 B CN118329614 B CN 118329614B CN 202410372089 A CN202410372089 A CN 202410372089A CN 118329614 B CN118329614 B CN 118329614B
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 239000006185 dispersion Substances 0.000 title claims description 23
- 230000008859 change Effects 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 51
- 239000010959 steel Substances 0.000 claims description 51
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- General Health & Medical Sciences (AREA)
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Abstract
The invention belongs to the field of anchor cable detection, and particularly relates to a detection method and a detection device for an anchor head assembly in a safe pressure-dispersed anchor cable, wherein the method detects deformation load and data such as a change interval, limit load, deformation and the like of the deformation load, and forms at least three curve correspondence relations such as a P-s curve, a P-t curve, an s-t curve and the like through time, load and deformation; compared with the prior art, the invention can be used as an important basis for evaluating the quality of the assembly of the anchor cable, and the allowable deformation between the sliding P anchor and the fixed P anchor can be reasonably planned by utilizing the data bases, thereby making an important contribution to the theoretical design of the assembly of the anchor cable under different application scenes, and the measuring method is simple and easy to implement.
Description
Technical Field
The invention belongs to the field of anchor cable detection, and particularly relates to a detection method and device for an anchor head assembly in a safe pressure dispersion anchor cable.
Background
The anchor cable is generally suitable for reinforcement operation of civil engineering such as foundation pit, side slope and the like. The common anchor cable is generally designed without reserved slippage, so that when the facility structure is changed (earthquake, landslide and the like), the common anchor cable is subjected to sudden tension to easily break steel strands. The anchor head assembly in the safety pressure dispersion anchor cable is designed with a reserved deformation, namely an allowable deformation between the sliding P anchor and the fixed P anchor, a specific product example of the safety pressure dispersion anchor cable device is given in fig. 1, and reference is also made to CN203514308U, CN201258485Y. Because the length and the allowable deformation amount of the anchor cable are different in different application environments, for example, in a slope environment with larger shock resistance, the anchor cable with larger allowable deformation amount is required. In a confined pit, however, smaller lengths are required to allow for smaller deformation anchor lines.
In the prior art, aiming at the allowable deformation between the sliding P anchor and the fixed P anchor, the method still stays at the stage of subjective experience design, and no objective data is used as the theoretical design basis of the distributed anchor cable. If the allowable deformation is designed to be too small, contact is generated between the sliding P anchor and the fixed P anchor when the excessive load is applied, and the steel strand is still subjected to strong tensile force to cause fracture. Therefore, the proper allowable deformation is designed, the whole length of the anchor cable is not influenced, scientific basis can be provided for the product design of the distributed anchor cable, the requirements of different loads and construction environments of various projects are met, and the stable performance can be ensured to be used for a long time.
Based on the purpose, the invention can be used as an important basis for judging the product performance of the anchor cable assembly by measuring the deformation load of the anchor head assembly in the safe pressure dispersion anchor cable and the data such as the change interval, the limit load, the deformation and the like of the anchor head assembly and forming a relevant curve.
Disclosure of Invention
The invention aims to provide a detection method and a detection device for an anchor head assembly in a safe pressure dispersion anchor cable, which solve the problems in the prior art, and the technical scheme adopted by the invention is as follows:
A detection method of an anchor head assembly in a safe pressure dispersion anchor cable comprises the following steps:
firstly, installing an anchor head assembly in a single safe pressure dispersion anchor cable on a detection device, and connecting a steel strand with tension equipment;
secondly, starting tension equipment, and enabling the steel strand to be subjected to tension until the steel strand breaks;
Thirdly, recording a tension value of the tension device, and measuring the change of the distance between the sliding P anchor and the fixed P anchor by a detection device;
Fourthly, when the steel strand and the sliding P anchor generate relative displacement, until the sliding P anchor contacts the fixed P anchor, taking a tension value of the relative displacement generated by the steel strand and the sliding P anchor as a deformation load and recording a change interval of the deformation load;
Fifthly, if the deformation is smaller than the maximum set threshold, or the detection value interval of the deformation load exceeds +/-10% of the deformation rated load, or the limit load is smaller than the limit load standard value of the steel strand raw material, the root assembly does not meet the requirement;
And step six, forming at least three curve corresponding relations of a p-s curve, a p-t curve and an s-t curve through the time, the load and the deformation to the test process of the assembly, wherein p is the load, t is the time, s is the displacement, and comprehensively evaluating the performance of the assembly through the curves and taking the performance as the performance judging basis of the assembly.
A detection device for an anchor head assembly in a safe pressure dispersion anchor cable comprises a base, a blocking part and a sliding part, wherein the blocking part and the sliding part are arranged on the base, one end of a steel strand penetrates through the blocking part and is connected with tension equipment, a sliding P anchor is abutted against the blocking part, the sliding part is connected with a fixed P anchor, and the sliding part is connected with a sliding ruler to measure the distance change between the sliding P anchor and the fixed P anchor.
Further, the separation part comprises a stress plate and a connecting sleeve, one side of the stress plate is fixedly connected with the connecting sleeve, the connecting sleeve is sleeved on the sliding P anchor, and the inside of the connecting sleeve is of a ladder structure and is used for abutting against the end part of the sliding P anchor, and a steel strand penetrates through the connecting sleeve and the stress plate.
Further, one side, far away from the stress plate, of the connecting sleeve is fixedly connected with a first supporting plate, the top of the first supporting plate is detachably connected with a first mounting plate, the first supporting plate and the first mounting plate are of semicircle structures, a round hole through which a sliding P anchor passes is formed together, and the top of the first mounting plate is fixedly connected with a first limiting plate;
The top of the sliding part is connected with a connecting rod, the connecting rod slidably passes through the first limiting plate, and the connecting rod is connected with the sliding ruler through a distance amplifying mechanism so as to amplify the movement stroke of the sliding ruler.
Further, the distance amplifying mechanism comprises a driving gear, a driven gear and a bracket, the bracket is arranged at the top of the connecting sleeve, the driving gear and the driven gear are rotatably connected to the bracket, the driving gear is meshed with the driven gear, rack parts are respectively arranged at the bottom of the connecting rod and the top of the sliding ruler, the rack parts of the connecting rod are meshed with the driving gear, and the rack parts of the sliding ruler are meshed with the driven gear;
the diameter of the driving gear is larger than that of the driven gear.
Further, the sliding component comprises a second supporting plate, a second mounting plate and a second limiting plate;
The top of the second supporting plate is detachably connected with the second limiting plate, a limiting stepped hole is formed in the side, opposite to the second supporting plate, of the second limiting plate, the limiting stepped hole is sleeved at one end, far away from the sliding P anchor, of the fixed P anchor and is abutted to the end of the sliding P anchor, the top of the second limiting plate is fixedly connected with the second limiting plate, and the second limiting plate is detachably connected with the end of the connecting rod.
Further, the bottom of the second supporting plate is slidably arranged on the base, and the stress plate and the bottom of the connecting sleeve are slidably arranged on the base.
Further, the stress plate is far away from one side of the connecting sleeve is fixedly connected with a support column, one end, away from the stress plate, of the support column is abutted to a pressure detection component, the pressure detection component is installed on the fixed plate, and the bottom of the fixed plate is fixedly connected with the base.
Further, a sliding block is sleeved at one end of the steel strand penetrating through the fixed plate, the sliding block is attached to the fixed plate, and the sliding block is fixedly connected with a second scale;
and the second scale is used for measuring the elastic travel of the steel strand before the steel strand and the sliding P anchor generate relative displacement.
Compared with the prior art, the invention mainly measures the deformation load of the anchor head assembly in the safety pressure dispersion anchor cable and the data such as the change interval, the limit load, the deformation and the like of the anchor head assembly, can be used as an important basis for evaluating the quality of the assembly of the anchor cable, can reasonably plan the allowable deformation between the sliding P anchor and the fixed P anchor by utilizing the data basis, and makes an important contribution to the theoretical design of the assembly of the anchor cable in different application scenes.
Drawings
Fig. 1 is a diagram of an example product of a safety pressure-dispersing cable arrangement;
Fig. 2 is a schematic view of the overall structure of the detection device of the anchor head assembly in the safety type pressure dispersion anchor cable of the present invention;
FIG. 3 is an enlarged schematic view of FIG. 2 at A;
fig. 4 is a schematic diagram of the connection relationship between the support plate and the mounting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 4 in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1, a product example of a safety pressure-dispersing anchor cable device according to the present invention is shown in the prior art, wherein a sliding P anchor and a fixed P anchor are fixedly sleeved on a steel strand, and when the steel strand is pretensioned or the structure of a facility changes, the steel strand and the sliding P anchor slide relatively, and the sliding P anchor and the fixed P anchor slide relatively. The invention mainly aims to detect whether the reserved distance between the sliding P anchor and the fixed P anchor is enough or not when the steel stranded wire is broken under the maximum load, namely whether the allowable deformation (maximum deformation) between the sliding P anchor and the fixed P anchor meets the requirement or not.
A detection method of an anchor head assembly in a safe pressure dispersion anchor cable comprises the following steps:
firstly, installing an anchor head assembly in a single safe pressure dispersion anchor cable on a detection device, and connecting a steel strand 3 with tension equipment;
secondly, starting a tension device, and enabling the steel strand 3 to be subjected to tension until the steel strand breaks;
thirdly, recording a tension value of the tension device, and measuring the change of the distance between the sliding P anchor 1 and the fixed P anchor 2 by a detection device;
fourthly, when the steel strand 3 and the sliding P anchor 1 generate relative displacement, until the sliding P anchor 1 contacts the fixed P anchor 2, taking the tension value of the relative displacement generated by the steel strand 3 and the sliding P anchor 1 as a deformation load and recording a change interval of the deformation load;
Fifthly, if the deformation is smaller than the maximum set threshold, or the detection value interval of the deformation load exceeds +/-10% of the deformation rated load, or the limit load is smaller than the limit load standard value of the steel strand raw material, the root assembly does not meet the requirement;
And step six, forming at least three curve corresponding relations of a p-s curve, a p-t curve, an s-t curve and the like on the anchor cable test process through time, load and deformation, wherein p is load, t is time, s is displacement, and comprehensively evaluating the performance of the assembly through the curve and taking the performance as an assembly performance judging basis.
Wherein the initial distance between the sliding P-anchor and the fixed P-anchor is the allowed deformation, and the maximum set threshold may be set to a specific value, for example, 30mm for the allowed deformation and 30mm for the set threshold, so that the assembly is not satisfactory as long as the maximum deformation between the sliding P-anchor 1 and the fixed P-anchor 2 is less than 30 mm.
In particular, the curve can be drawn by fitting and averaging; the curve comprises a time point-deformation curve, an actual measurement load-deformation curve and a time point-actual measurement load curve, and the common characteristics of the assembly can be reflected through the curve, so that the assembly can be designed through the curve data and the detection data in the design stage of the assembly. The displacement of the sliding P anchor 1 can be detected by a laser distance meter or other distance detecting device, and also by the detecting means described below.
In the sixth step, the corresponding assembly is indicated to have good sliding stability if the profile is smooth when the sliding anchor slides, poor sliding stability if the profile is uneven, abrupt and low in correlation, and the performance of the assembly needs to be comprehensively evaluated based on the profile and the detected parameters if the assembly is determined to be satisfactory in the fifth step, but the profile is not smooth when the sliding anchor slides in the sixth step.
The invention discloses a safe pressure-dispersion anchor cable inner anchor head assembly, which is characterized in that an inner anchor head assembly is formed by single anchor cable with inner anchor heads, wherein the inner anchor head assembly is formed by 3 single safe pressure-dispersion anchor cable inner anchor head assemblies according to the same steel strand, anchor tool manufacturers, the same model, the same specification and the same processing technological parameters, the inner anchor head assembly is used as a detection batch, each batch is subjected to sampling inspection, 2 assemblies in the 3 assemblies are out of compliance, the batch is judged to be out of compliance, 1 assembly in the 3 assemblies is out of compliance, and a double number of samples are taken for carrying out a rework test, if the samples still are out of compliance, the batch is judged to be out of compliance.
The invention not only provides a detection method of an anchor head assembly in a safe pressure dispersion anchor cable, but also can take data produced by the detection method as a theoretical analysis basis to form a curve relation of time points, actual measurement loads and deformation, thereby providing theoretical data basis for assembly design, assembly analysis and the like to guide the later assembly design production stage.
The safety pressure dispersion anchor cable device comprises a guide cap, a fastening plate, a sealing cover, a steel bearing body, a fastening screw, a sealing adhesive tape, a sliding P anchor, a fixed P anchor, a steel strand and anti-corrosion grease, wherein an inner anchor head assembly is an assembly formed by the steel strand, the sliding P anchor and the fixed P anchor, and the single assembly can also be called a single anchor cable or a single anchor cable with an inner anchor head.
Referring to fig. 2, a detection device for an anchor head assembly in a safety pressure dispersion anchor cable comprises a base 4, a blocking component and a sliding component, wherein the blocking component and the sliding component are installed on the base 4, one end of a steel strand 3 passes through the blocking component and is connected with a tensile device, a sliding P anchor 1 is abutted against the blocking component, the sliding component is connected with a fixed P anchor 2, and a sliding ruler 19 is connected with the sliding component to measure the distance change between the sliding P anchor 1 and the fixed P anchor 2.
The tension equipment is in the prior art, such as steel strand, wire rope pretensioning equipment, steel strand tension detection equipment, a punching jack, a hydraulic cylinder matched with a steel strand chuck and other various embodiments. The blocking member acts to resist sliding P anchor 1 from movement, thereby allowing relative movement between strand 3 and anchor 2.
Further, the separation part comprises a stress plate 6 and a connecting sleeve 11, one side of the stress plate 6 is fixedly connected with the connecting sleeve 11, the connecting sleeve 11 is sleeved on the sliding P anchor 1, the inside of the connecting sleeve 11 is of a step structure and is used for being abutted to the end part of the sliding P anchor 1, and the steel stranded wires 3 penetrate through the connecting sleeve 11 and the stress plate 6.
The steel strand 3 and the sliding P anchor 1 form a stepped structure, so that the sliding P anchor 1 is restrained by the stepped structure inside the connecting sleeve 11.
Further, one side of the connecting sleeve 11 away from the stressed plate 6 is fixedly connected with a first supporting plate 12, the top of the first supporting plate 12 is detachably connected with a first mounting plate 13, the first supporting plate 12 and the first mounting plate 13 are of semicircular structures, a round hole through which the sliding P anchor 1 passes is formed by the two, and the top of the first mounting plate 13 is fixedly connected with a first limiting plate 14;
the top of the sliding part is connected with a connecting rod 18, the connecting rod 18 slidably passes through the first limiting plate 14, and the connecting rod 18 is connected with the sliding ruler 19 through a distance amplifying mechanism so as to amplify the movement stroke of the sliding ruler 19.
Specifically, the sliding rule 19 is parallel to the connecting rod 18, and during the relative movement of the fixed P anchor 2, the sliding rule 19 slides, so that the distance of the relative movement of the fixed P anchor 2, that is, the deformation between the fixed P anchor 2 and the sliding P anchor 1 can be obtained through the reading of the sliding rule 19.
As shown in fig. 3, the distance amplifying mechanism comprises a driving gear 20, a driven gear 21 and a bracket 22, wherein the bracket 22 is installed at the top of the connecting sleeve 11, the bracket 22 is rotatably connected with the driving gear and the driven gear, the driving gear 20 is meshed with the driven gear 21, rack parts are respectively arranged at the bottom of the connecting rod 18 and the top of the sliding ruler 19, the rack parts of the connecting rod 18 are meshed with the driving gear 20, and the rack parts of the sliding ruler 19 are meshed with the driven gear 21;
the diameter of the driving gear 20 is larger than the driven gear 21.
Specifically, the diameter of the driving gear 20 is preferably designed to be an integer multiple of the diameter of the driven gear 21, and the sliding stroke of the connecting rod 18 can be amplified several times by equal proportion conversion and is reflected on the sliding stroke of the sliding ruler 19, and the advantage of designing the amplifying mechanism is that the displacement change of the fixed P anchor 2 can be more intuitively and accurately measured, and the moment when the fixed P anchor 2 starts to move relatively can be more accurately obtained.
Further, the sliding part includes a second support plate 15, a second mounting plate 16, and a second limiting plate 17;
The top of the second supporting plate 15 is detachably connected with the second mounting plate 16, a limit stepped hole is formed on one side, opposite to the second supporting plate 15, of the second mounting plate 16, the limit stepped hole is sleeved at one end, far away from the sliding P anchor 1, of the fixed P anchor 2 and abuts against the end of the sliding P anchor 1, the top of the second mounting plate 16 is fixedly connected with the second limiting plate 17, and the second limiting plate 17 is detachably connected with the end of the connecting rod 18.
Specifically, as shown in fig. 4, the cross-sectional structures of the first support plate 12 and the second support plate 15 are the same, and the cross-sectional structures of the first mounting plate 13 and the second mounting plate 16 are the same, which are different in that the first support plate 12 and the first mounting plate 13 are located on the sliding P anchor 1, and the second support plate 15 and the second mounting plate 16 together form a limit stepped hole to restrain the end of the fixed P anchor 2.
The first mounting plate 13 and the second mounting plate 16 are of semicircular structures, groove body parts 24 are respectively arranged at two ends of the first mounting plate 13 and the second mounting plate 16, the second supporting plate 15 and the second mounting plate 16 are of semicircular structures, inserting piece parts 26 are respectively arranged at two ends of the second mounting plate 15 and the second mounting plate 16, the inserting piece parts 26 are inserted into the corresponding groove body parts 24, and bolts 25 penetrate through the groove body parts 24 and the inserting piece parts 26, so that the first mounting plate 13 and the first supporting plate 12, the second supporting plate 15 and the second mounting plate 16 are connected.
Further, the bottom of the second supporting plate 15 is slidably disposed on the base 4, and the bottom of the force-bearing plate 6 and the bottom of the connecting sleeve 11 are slidably disposed on the base 4.
Further, the stress plate 6 is far away from one side of the connecting sleeve 11 and is fixedly connected with the support column 7, one end, away from the stress plate 6, of the support column 7 is abutted to the pressure detection component 8, the pressure detection component 8 is installed on the fixed plate 5, and the bottom of the fixed plate 5 is fixedly connected with the base 4.
In the present invention, for the measurement of the load, the load output from the tension device may be used as the measurement load, or may be measured by the pressure detecting means 8, and the pressure detecting means 8 is a conventional technology, such as a load cell. The support columns 7 are arranged in a plurality to meet the support requirement.
Further, the steel strand 3 passes through one end of the fixed plate 5 and is sleeved with a sliding block 9, the sliding block 9 is attached to the fixed plate 5, and the sliding block 9 is fixedly connected with a second scale 10;
the second scale 10 is used for measuring the elastic travel of the steel strand 3 before the steel strand 3 and the sliding P anchor 1 generate relative displacement.
Before the steel strand 3 and the sliding P anchor 1 are relatively displaced, the steel strand 3 is elastically deformed, and is elongated, and the fixed P anchor 2 does not move at this time. The sliding block 9 drives the second scale 10 to move, so that the elastic travel of the steel strand 3 can be measured.
In addition, regarding the stroke acquisition of the slide rule 19 and the second rule 10, corresponding mark lines may be provided on the connection sleeve 11 and the fixing plate 5 for reading the stroke amount. Corresponding photoelectric sensors, displacement sensors, distance sensors, etc. may be provided on the connection sleeve 11 and the fixed plate 5 to electronically detect the stroke changes of the slide rule 19 and the second scale 10. And when the slide rule 19 starts to move, the stroke of the second rule 10 at this time is recorded as the strand elastic stroke.
Compared with the prior art, the invention mainly measures the deformation load of the anchor head assembly in the safety pressure dispersion anchor cable and the data such as the change interval, the limit load, the deformation amount, the elastic travel of the steel strand before deformation and the like of the anchor head assembly, can be used as important basis for evaluating the quality of the assembly, can reasonably plan the allowable deformation amount between the sliding P anchor 1 and the fixed P anchor 2 by utilizing the data basis, and makes important contribution to the theoretical design of the assembly of the anchor cable in different application scenes.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications, variations, alterations, substitutions made by those skilled in the art to the technical solution of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the design of the present invention.
Claims (8)
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| CN202410372089.8A CN118329614B (en) | 2024-03-29 | 2024-03-29 | Detection method and device for anchor head assembly in safety pressure dispersion anchor cable |
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| CN202410372089.8A CN118329614B (en) | 2024-03-29 | 2024-03-29 | Detection method and device for anchor head assembly in safety pressure dispersion anchor cable |
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| CN106320394B (en) * | 2016-08-22 | 2018-04-20 | 四川省建筑科学研究院 | Prestressing force expands the reduced chemical reaction kinetics model of body anchorage cable anchoring malformation |
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| CN116356888A (en) * | 2023-02-02 | 2023-06-30 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Optical fiber-based piston type large-deformation prestressed anchor cable monitoring device and construction method |
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