CN102839693B - Increase resistive shape anchor pole/anchorage cable anchoring quality monitoring device and application process - Google Patents
Increase resistive shape anchor pole/anchorage cable anchoring quality monitoring device and application process Download PDFInfo
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- CN102839693B CN102839693B CN201210341773.7A CN201210341773A CN102839693B CN 102839693 B CN102839693 B CN 102839693B CN 201210341773 A CN201210341773 A CN 201210341773A CN 102839693 B CN102839693 B CN 102839693B
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Abstract
A kind of increasing resistive shape anchor pole/anchorage cable anchoring quality monitoring device and application process thereof, this device comprises increasing resistive shape anchor bar/anchor cable, displacement measurement unit, data acquisition equipment, information carrying means and central processing system; The displacement that the body of rod (cable body) occurs in the course of the work is recorded by the displacement measurement unit be arranged on each anchor bar/anchor cable, by data acquisition equipment and information carrying means, data summarization is sent to central processing system, the displacement data that transmission comes can be converted into the pulling capacity data of anchor bar/anchor cable according to the force-displacement curve that draws of anchor bar/anchor cable self by central processing system.This device can be monitored simultaneously and be provided anchored force and the surrounding rock displacement of anchor bar/anchor cable, and Timeliness coverage inefficacy anchor bar/anchor cable also predicts that wall damage destroys, and effectively prevents the generation of security incident, greatly reduces monitoring cost.
Description
Technical field
The present invention relates to geotechnical engineering anchoring field, particularly relate to anchor pole/anchorage cable anchoring quality monitoring device and application process thereof.
Background technology
Along with the deep development that extensive geotechnical engineering is built, the geological conditions faced becomes increasingly complex, and country rock often shows the feature of large deformation.When rock deformation is comparatively large, when exceeding the scope that anchor bar/anchor cable can bear, anchor pole/failure of cable destruction will be caused, and then cause underground construction unstable failure accident.
For this situation, applicant develops corresponding resistive shape anchor bar/anchor cable (201110368935.1,201110368805.8) that increases to adapt to these situations.Above-mentioned patented product finds following problem in application process: in order to the reliability of the stability and anchoring system of grasping country rock, need the anchoring quality of long term monitoring anchor bar/anchor cable (comprising anchored force and surrounding rock displacement), do not have corresponding equipment can monitor above-mentioned Two Variables at present simultaneously, and the cost of specialized detection is higher, and there is various drawback.
Generally anchor-holding force of anchor bolt is detected by pull-out test method or stess wave method in China.Pull-out test method rests on more carries out the mechanical damage pull-out test stage with jack, testing process can produce infringement to anchor pole, and the stressing conditions of anchor pole and anchor pole natural stress in rock mass have very big difference in drawing experiment, the method can not reflect real stress in the anchor pole course of work.When detecting Detection of Bolt Bonding Integrity with stess wave method, the decay within the system of stress wave energy quickly, be difficult to the reflected signal seeing bottom, and be easily subject to the impact of factors, as the distribution etc. of anchor pole revealed section length, mortar strength, rock joint, this contains many interference components with regard to making the signal recorded, thus is difficult to provide one evaluate accurately according to the anchoring quality of signal to anchor pole of actual measurement.In addition, above two kinds of methods all can not reflect the displacement that anchor bar/anchor cable occurs with country rock, and for detecting the multiple position extensometer of surrounding rock displacement, each measuring point cost reaches several thousand yuan, is not suitable for the measurement carrying out surrounding rock displacement on a large scale.
For the major works that security level required is higher, need to monitor anchor pole/anchorage cable anchoring quality for a long time, with Timeliness coverage inefficacy anchor bar/anchor cable, prevent the danger that may occur, and take to change or corresponding maintenance measure.These surveying works the manpower and materials of at substantial can carry out in-site measurement and data processing, and may cause measure error due to person-to-person measurement difference.In addition, this measurement can not carry out Active measuring and forecast for contingent emergency at any time.
Summary of the invention
For above-mentioned situation, the present invention proposes a kind of increasing resistive shape anchor pole/anchorage cable anchoring quality monitoring device and application process, and this monitoring device is coupling in support apparatus, can realize the timely monitor to anchor pole/anchorage cable anchoring power and surrounding rock displacement by lower cost.
Its technical solution is:
A kind of increasing resistive shape anchor pole/anchorage cable anchoring quality monitoring device, is characterized in that comprising: increase resistive shape anchor bar/anchor cable, displacement measurement unit, data acquisition equipment, information carrying means and central processing system.
Described increasing resistive shape anchor bar/anchor cable comprises: friction sleeve pipe, contractibility component, the body of rod (steel strand), pallet, nut and outer end cap.Described friction sleeve pipe, be tubular thick walled steel tube, internal diameter passes through and diminishes gradually; Described contractibility component, for being with the steel pipe of axial gap, be nested in friction sleeve pipe, the external diameter of contractibility component diminishes from one end of component gradually to the other end, the outer wall of contractibility component keeps in touch with the inwall of friction sleeve pipe, by during pulling force with friction sleeve pipe generation relative sliding, breach is compressed simultaneously, and resistance increases thereupon.Tension can to extend and itself does not destroy when country rock generation large deformation, and can working resistance be increased continuously, can also constantly absorb surrouding rock deformation energy in the process.End caps wire guide should be reserved outside, so that displacement measurement unit lead-in wire is derived when being applied to of the present invention.
Described displacement measurement unit, is pre-installed in and increases resistive shape anchor bar/anchor cable inside pipe casing, be fixed on internal surface of sleeve pipe, and be connected with the body of rod (cable body), in order to measure the body of rod (cable body) and sleeve pipe relative displacement.A kind of preferred embodiment of displacement measurement unit is for adopting position sensor (LVDT).For different measurement categorys, displacement measurement unit can have multiple, forms one and measures group, to detect the anchoring quality of anchor bar/anchor cable group.
Described data acquisition equipment, comprises data acquisition interface, signal conversion unit, data storage cell and data outputting unit, is connected with at least one displacement measurement unit, collects the body of rod displacement data that displacement measurement unit records, and driven rod displacement body data.For different measurement categorys, data acquisition equipment can have one or more.
Described information carrying means, for the data transmission between data acquisition unit and central processing system, this device is except adopting data call wire, and another kind of preferred version is for wirelessly to carry out data transmission.
Described central processing system, comprise data receipt unit, data storage cell, data processing unit, data outputting unit, screen display unit and alarm sounds unit, the body of rod displacement data that data acquisition equipment transmits by data processing unit carries out aggregation process, body of rod displacement data terminal recorded is converted into pulling capacity and the surrounding rock displacement data of anchor bar/anchor cable, and output to display, when pulling capacity and the surrounding rock displacement data appearance exception of anchor bar/anchor cable, output alarm signal.
As a kind of preferred embodiment, the group's quality and the surrounding rock displacement monitoring device that increase resistive shape anchor bar/anchor cable also comprise field processing equipment, possess configuration and the function of described central processing system, are arranged on engineering site, in good time observation monitoring result, to pinpoint the problems and to process in time.
Application process of the present invention is:
1. the increasing resistive shape anchor bar/anchor cable for a certain specific model makes pull-out test, obtains it and draws force-displacement curve, and be input in central processing system by the numerical relation of its correspondence;
2. displacement measurement unit is preloaded onto in the friction sleeve pipe increasing resistive shape anchor bar/anchor cable, is fixed on internal surface of sleeve pipe, and is connected with the body of rod (cable body);
3. other each devices increasing resistive shape anchor bar/anchor cable and detection system are installed, after substantially debugging, start the monitoring carrying out anchoring quality.
The operating principle of this device is as follows:
By being arranged on the displacement measurement unit on each anchor bar/anchor cable, record the displacement (namely mechanical slip) between the two that body of rod Relative friction sleeve pipe in work process occurs, by data acquisition equipment, displacement data is gathered storage, then by information carrying means, data are sent to central processing system.The displacement data that transmission comes, according to the character of anchor bar/anchor cable, can be converted into pulling capacity and the surrounding rock displacement data of anchor bar/anchor cable, and comprehensively can analyze the anchoring quality of anchor pole/anchor cable according to pulling capacity and surrounding rock displacement situation by central processing system.When monitored data occur abnormal (sharply reduce as pulling capacity or raise, displacement of wall rock is excessive, change in displacement excessive velocities) time send warning in good time.
The method by the body of rod and sleeve pipe relative displacement data transformations being the pulling capacity of anchor bar/anchor cable and surrounding rock displacement data is as follows: for the increasing resistive shape anchor bar/anchor cable of any specific model, between the pulling force that the body of rod and sleeve pipe relative displacement and anchor bar/anchor cable are subject to, there is relation one to one, demarcated by pull-out test and can obtain the two and corresponding draws force-displacement curve.By this curve, this can try to achieve its anchored force by the displacement of increasing resistive shape anchor bar/anchor cable, and wherein body of rod displacement data can be similar to as surrounding rock displacement data, assesses anchoring quality thus.
The beneficial effect of this device is as follows:
The pulling capacity of anchor bar/anchor cable and surrounding rock displacement are monitored two class devices by the present invention to be coupled in support apparatus, can realize the timely monitor to surrounding rock displacement and anchor pole/anchorage cable anchoring power by lower cost simultaneously.According to survey data monitoring analysis anchoring quality, Timeliness coverage inefficacy anchor bar/anchor cable, in case of emergency remind manager's anchoring system and state of surrounding rock, to take treatment measures in time, effectively prevent the generation of security incident, be suitable for the demand that the fields such as Hydraulic and Hydro-Power Engineering, slope project, mine engineering are monitored country rock and anchor device, greatly can reduce monitoring cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and detailed description of the invention, the invention will be further described:
Fig. 1 is the technology of the present invention principle schematic;
Fig. 2 is increasing resistive shape anchor cable cross-sectional view of the present invention;
Fig. 3 is the main TV structure principle schematic of contractibility component in Fig. 2 mode;
Fig. 4 is the left TV structure principle schematic of Fig. 3 mode;
Fig. 5 is the A-A schematic cross-section of Fig. 2;
Fig. 6 is a certain style number axis force of anchor-displacement curve demarcated by laboratory test;
Fig. 7 is data acquisition unit allocation plan;
Fig. 8 is central processing system allocation plan.
Detailed description of the invention
As shown in Figure 1, for according to a preferred embodiment of the present invention.According to the present invention, a kind of resistive shape anchor pole/anchorage cable anchoring quality monitoring device that increases comprises: increase resistive shape anchor bar/anchor cable 1, for supporting country rock; Displacement measurement unit 2, for measuring stick displacement body data; Data acquisition equipment 3, for gathering and storing data; Information carrying means 4, for exchanges data between device; Central processing system 5, for data analysis and Output rusults.
Composition graphs 2 to Fig. 5, described increasing resistive shape anchor bar/anchor cable, comprises friction sleeve pipe 101, contractibility component 102, steel strand (body of rod) 103, pallet 104, nut 105 and outer end cap 106.Described friction sleeve pipe, be tubular thick walled steel tube, internal diameter passes through and diminishes gradually; Described contractibility component, for being with the steel pipe of axial gap 107, be nested in friction sleeve pipe, the external diameter of contractibility component diminishes from one end of component gradually to the other end, its outer wall keeps in touch with the inwall of friction sleeve pipe, by during pulling force with friction sleeve pipe generation relative sliding, the passive contraction of breach simultaneously, resistance increases thereupon.End caps reserves wire guide 108 outside, so that displacement measurement unit lead-in wire is derived.
Shown in composition graphs 1,2, during on-the-spot application, before installation increases resistive shape anchor bar/anchor cable 1, displacement measurement unit 2 is pre-installed in and increases resistive shape anchor bar/anchor cable friction sleeve pipe 101 inside, be fixed on friction sleeve inside pipe wall, and be connected with the body of rod 103, in order to measure the body of rod and sleeve pipe relative displacement.A kind of preferred embodiment of displacement measurement unit is for adopting position sensor (LVDT), and its range can reach 500mm, maximum linear error be Full-span output ± 0.25%, meet the requirement of this device.For different works limits and measurement requirement, multiple displacement measurement unit can be had, form one and measure group, to detect the anchoring quality of whole anchor bar/anchor cable group.Described increasing resistive shape anchor bar/anchor cable is a kind of anchor bar/anchor cable that can extend with surrouding rock deformation, reserves wire guide 108, so that the installation of this device at places such as outer end caps.
Shown in composition graphs 7, data acquisition equipment 3, comprise data acquisition interface 301, signal conversion unit 302, data storage cell 303 and data outputting unit 304, data acquisition equipment is connected with at least one displacement measurement unit 2, the body of rod displacement data that collection and bank bit measuring unit record, in order to being transferred to central processing system analysis.For different measurement categorys, data acquisition equipment 3 can have one or more.
Information carrying means 4, for the data transmission between data acquisition unit 3 and central processing system 5.For Long-range Data Transmission, described information carrying means is except adopting call wire, and another kind of preferred version is for wirelessly to carry out data transmission.
Shown in composition graphs 8, central processing system 5, comprise data receipt unit 501, data storage cell 502, data processing unit 503, data outputting unit 504, screen display unit 505 and alarm sounds unit 506, the body of rod displacement data that data acquisition equipment transmits by data processing unit carries out aggregation process, by the relation of drawing force-displacement curve to represent shown in Fig. 6, body of rod displacement data terminal recorded is converted into the anchoring quality data of surrounding rock displacement and anchor bar/anchor cable, and output to display, sharply reduce in the pulling capacity of anchor bar/anchor cable or raise, displacement of wall rock is excessive, change in displacement excessive velocities, when exceeding setting value, output alarm signal.
As a kind of preferred embodiment, increase resistive shape anchor pole/anchorage cable anchoring quality monitoring device and also comprise field control equipment 6, it possesses configuration and the function of described central processing system, is arranged on engineering site, in good time observation monitoring result, to pinpoint the problems and to process in time.
By being arranged on the displacement measurement unit 2 on each anchor bar/anchor cable, record the body of rod 103 displacement that Relative friction sleeve pipe 102 occurs in work process, by data acquisition equipment 3, displacement data collection is gathered storage, then by information carrying means 4, data are sent to central processing system 5.Central processing system is according to the character of anchor bar/anchor cable, the displacement data that transmission comes can be converted into pulling capacity and the surrounding rock displacement data of anchor bar/anchor cable, when monitored data occur abnormal (pulling capacity sharply reduce or raise, displacement of wall rock is excessive) time send alarm signal.
Application process of the present invention is:
1. the increasing resistive shape anchor bar/anchor cable for a certain specific model makes pull-out test, obtains it and draws force-displacement curve, as shown in Figure 6, and be input in central processing system by the numerical relation of its correspondence;
2. displacement measurement unit is preloaded onto in the friction sleeve pipe increasing resistive shape anchor bar/anchor cable, is fixed on internal surface of sleeve pipe, and is connected with the body of rod;
3. other each devices increasing resistive shape anchor bar/anchor cable and detection system are installed, after substantially debugging, start the monitoring carrying out anchoring quality.
The method by the body of rod and sleeve pipe relative displacement data transformations being the pulling capacity of anchor bar/anchor cable and surrounding rock displacement data is as follows: for the increasing resistive shape anchor bar/anchor cable of any specific model, between the pulling force that the body of rod and sleeve pipe relative displacement and anchor bar/anchor cable are subject to, there is relation one to one, can be obtained the two by Experimental Calibration and corresponding draw force-displacement curve.By this curve, this can try to achieve its pulling capacity by the displacement of increasing resistive shape anchor bar/anchor cable, and wherein body of rod displacement data can be similar to as surrounding rock displacement data, can assess its anchoring quality accordingly.
The measurement of the pulling capacity of anchor bar/anchor cable and surrounding rock displacement are monitored two class devices by the present invention is coupled in support apparatus, can realize the timely monitor to surrounding rock displacement and anchor pole/anchorage cable anchoring quality by lower cost simultaneously.According to survey data monitoring analysis anchoring quality, Timeliness coverage inefficacy anchor bar/anchor cable, in case of emergency remind central processor's anchoring system and state of surrounding rock to take treatment measures in time, effectively prevent the generation of security incident, be suitable for the demand that the fields such as Hydraulic and Hydro-Power Engineering, slope project, mine engineering are monitored country rock and anchor device, greatly can reduce monitoring cost.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, within the protection domain that all should be encompassed in invention.
Claims (3)
1. increase resistive shape anchor pole/anchorage cable anchoring quality monitoring device, it is characterized in that: comprise and increase resistive shape anchor bar/anchor cable, displacement measurement unit, data acquisition equipment, information carrying means and central processing system;
Described increasing resistive shape anchor bar/anchor cable, comprising: friction sleeve pipe, contractibility component, the body of rod/steel strand, pallet, nut and outer end cap; Described friction sleeve pipe, be tubular thick walled steel tube, internal diameter passes through and diminishes gradually; Described contractibility component, for being with the steel pipe of axial gap, be nested in friction sleeve pipe, its external diameter diminishes from one end of component gradually to the other end, and the outer wall of contractibility component keeps in touch with the inwall of friction sleeve pipe; Friction sleeve pipe extends to outside anchor hole, and be open type structure, be threaded connection with outer end cap, outer end cap place reserves wire guide;
Described displacement measurement unit, be pre-installed in and increase resistive shape anchor bar/anchor cable friction inside pipe casing, be fixed on internal surface of sleeve pipe, and be connected with the body of rod/steel strand, displacement measurement unit adopts LVDT displacement transducer, for different measurement categorys, displacement measurement unit has multiple, forms one and measures group;
Described data acquisition equipment, comprise data acquisition interface, signal conversion unit, data storage cell and data outputting unit, data acquisition equipment is connected with at least one displacement measurement unit, and for different measurement categorys, data acquisition equipment has one or more;
Described information carrying means, for the data transmission between data acquisition equipment and central processing system, this device adopts data conductor or wireless mode to carry out data transmission;
Described central processing system, comprise data receipt unit, data storage cell, data processing unit, data outputting unit, screen display unit and alarm sounds unit, data processing unit is according to drawing force-displacement curve, body of rod terminal recorded/steel strand displacement data is converted into pulling capacity and the surrounding rock displacement data of anchor bar/anchor cable, and output to display, when pulling capacity and the surrounding rock displacement data appearance exception of anchor bar/anchor cable, output alarm signal; The described force-displacement curve that draws is obtained by pull-out test demarcation; Described surrounding rock displacement data equal the body of rod/steel strand displacement data; Described exception comprise pulling capacity sharply reduce or raise, displacement of wall rock is excessive, change in displacement is too fast.
2. increasing resistive shape anchor pole/anchorage cable anchoring quality monitoring device according to claim 1, also comprises field control equipment, possesses configuration and the function of described central processing system, be arranged on engineering site.
3. an application process for increasing resistive shape anchor pole/anchorage cable anchoring quality monitoring device according to claim 1, is characterized in that comprising the following steps:
1. the increasing resistive shape anchor bar/anchor cable for a certain specific model makes pull-out test, obtains it and draws force-displacement curve, and be input in central processing system by the numerical relation of its correspondence;
2. displacement measurement unit is preloaded onto in the friction sleeve pipe increasing resistive shape anchor bar/anchor cable, is fixed on friction sleeve inside pipe wall, and is connected with the body of rod/steel strand;
3. other each devices increasing resistive shape anchor bar/anchor cable and monitoring device are installed, after debugging, start the monitoring carrying out anchoring quality.
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| CN109281694A (en) * | 2018-10-22 | 2019-01-29 | 山东建筑大学 | Can the self-locking of real-time display anchor pole or anchor cable axle power allow pressure pallet and operating method |
| CN110057699B (en) * | 2019-03-19 | 2021-12-07 | 长安大学 | Anchoring system drawing device, drawing detection device and method |
| CN114150665B (en) * | 2021-12-08 | 2024-02-20 | 中国建筑第五工程局有限公司 | Foundation pit expansion bolt type prestress anchor rod applying mechanism and construction method thereof |
| CN115206078B (en) * | 2022-09-15 | 2022-12-16 | 法施达(天津)智能科技有限公司 | Railway anchoring detection and early warning method, system and equipment based on cloud data analysis |
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