CN107014328B - Surface inhaul cable force measuring type geological disaster automatic monitoring device and method - Google Patents
Surface inhaul cable force measuring type geological disaster automatic monitoring device and method Download PDFInfo
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- CN107014328B CN107014328B CN201710380207.XA CN201710380207A CN107014328B CN 107014328 B CN107014328 B CN 107014328B CN 201710380207 A CN201710380207 A CN 201710380207A CN 107014328 B CN107014328 B CN 107014328B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
Abstract
The application discloses a surface inhaul cable force measuring type geological disaster automatic monitoring device and method, and relates to the field of geological disaster monitoring. The device comprises: the system comprises a remote monitoring end and at least one tension testing unit; each tension test unit comprises a fixed pile and at least one tension net, and each tension net comprises a main bearing cable, n branch cables and n anchor piles with pre-monitoring points. The method comprises the following steps: and setting a surface inhaul cable force measuring type geological disaster automatic monitoring device on the landslide A to be monitored, acquiring and recording basic monitoring values of each force measuring sensor on any tension net A on the landslide A to be monitored, and judging whether the landslide A to be monitored has the landslide or not through the change of each force measuring sensor on the device. The method can directly monitor the potential energy trend of the landslide body by a inhaul cable type force measuring mode, and has the characteristics of simple implementation, low cost, high coverage density of regional monitoring points and early discovery of landslide symptoms.
Description
Technical Field
The application relates to the field of geological disaster monitoring, in particular to a surface inhaul cable force-measuring type geological disaster automatic monitoring device and method.
Background
The settlement monitoring is an important monitoring feature of landslide, and the existing landslide monitoring method mainly comprises monitoring methods of earth surface displacement monitoring (namely high-precision satellite navigation positioning), a crack meter, deep displacement inclinometry, a soil pressure box and the like, and the methods currently have the problems of limited application range, high cost, insufficient monitoring distribution density and the like, and specifically comprise the following steps:
1. the high-precision satellite navigation positioning measurement is carried out to receive Beidou satellite signals and GPS satellite signals for differential RTK calculation, and the positioning precision of a plurality of millimeters is calculated by using a radio distance measuring principle and a distance of 2-3 kilometers; the method has the defects of high cost of the receiver, high communication cost, high difficulty of resolving software algorithm and incapability of popularizing and popularizing. Meanwhile, the satellite signals cannot be shielded, so that the requirements on landslide topography and vegetation coverage are high, and the method is not suitable for mountain areas with luxuriant vegetation.
2. The crack meter can only monitor the sliding slope trailing edge stretching crack, the monitoring area is limited, and the crack meter can only be used as a supplementary monitoring method.
3. The deep position inclinometry is to drill deep holes in mountain bodies and install inclinometer bars or inclinometer pipes, so that the construction cost is high, and the number of monitoring points and the selection of the positions of the monitoring points can directly influence the accuracy of the monitoring effect.
4. The soil pressure box is a measuring and detecting element which is matched with the treatment engineering and is arranged on the retaining surface of the slide-resistant pile to measure the pressure of the soil body to the slide-resistant pile, and the soil pressure box is required to be matched with the slide-resistant pile and cannot be used as emergency monitoring.
Disclosure of Invention
The application aims to provide a surface inhaul cable force measuring type geological disaster automatic monitoring device and method, so that the problems in the prior art are solved.
In order to achieve the above object, the surface inhaul cable force measuring type geological disaster automatic monitoring device of the present application comprises: the system comprises a remote monitoring end and at least one tension testing unit; each tension test unit comprises a fixed pile and at least one tension net, each tension net comprises a main bearing cable, n branch cables and n anchor piles with pre-monitoring points, and n is more than or equal to 1; the fixing pile is arranged at the mountain top of a mountain to be detected, one end of the main bearing cable is connected with the fixing pile through a main force transducer, the other end of the main bearing cable is connected with a pre-monitoring point anchor pile through a branch cable, a plurality of branch force transducers are arranged on the cable body of the main bearing cable, and each branch force transducer is connected with the pre-monitoring point anchor pile through a branch cable; and the main force transducer and all the branch force transducers are connected with the remote monitoring end in a wireless communication manner.
Preferably, the branch inhaul cables are in one-to-one correspondence with anchor piles of the pre-monitoring points, and inhaul cable bodies of any two branch inhaul cables are not crossed.
Preferably, pretightening springs are arranged between the main bearing inhaul cable and the main force sensor, and between the branch inhaul cable and the anchor pile of the pre-monitoring point.
Preferably, one end of the main bearing cable is connected with the fixed piles through a main force sensor, the other end of the main bearing cable is connected with more than two branch cables, and each branch cable is connected with one anchor pile with a pre-monitoring point.
Preferably, the anchor pile of the pre-monitoring point is arranged on the landslide to be monitored.
The application discloses an automatic monitoring method based on a surface inhaul cable force-measuring type geological disaster automatic monitoring device, which comprises the following steps:
s1, acquiring a landslide A to be monitored, and setting a plurality of anchor piles with pre-monitoring points on the landslide A to be monitored;
a fixed pile is arranged on the mountain top of the mountain where the landslide A to be monitored is located, the fixed pile is connected with a main bearing cable through a main force transducer, and each anchor pile of the pre-monitoring point is connected with the main bearing cable through a branch force transducer and a branch cable corresponding to the anchor pile one by one; a pre-tightening spring is arranged between the main bearing inhaul cable and the main force sensor and between the branch inhaul cable and the anchor pile of the pre-monitoring point;
after tensioning all the pre-tightening springs, finishing the installation of a tension net A on a landslide A to be monitored, taking the measured values of a current main force transducer and each branch force transducer as basic monitoring values of the tension net A, and acquiring and recording the basic monitoring values of the tension net A by a remote monitoring end;
s2, the remote monitoring end obtains a real-time measured value of the main force transducer, judges whether the real-time measured value of the main force transducer is different from a basic monitored value, if so, a landslide A to be monitored is likely to slide, and enters S3; if not, the landslide A to be monitored is unlikely to slide;
and S3, the remote monitoring end acquires real-time measurement values of the branch force transducers, and a landslide trend of the landslide A to be monitored is obtained on the basis of comparison between the real-time measurement values of the branch force transducers and basic monitoring values of the branch force transducers.
The principle of the application is as follows: the method comprises the steps of arranging and installing a fixed pile at the top of a target mountain, paving a main bearing cable along the main sliding direction of a landslide to be monitored, connecting the top of the main bearing cable with the fixed pile, installing a pre-monitoring point anchor pile in the soil of the landslide to be monitored where a pre-monitoring point is located, connecting the pre-monitoring point anchor pile with the main bearing cable through a branch cable, and giving a certain pre-tightening tension through a tension spring. And the main bearing cable and the branch cables are provided with force sensors, and tension values of the main bearing cable and the branch cables are measured in real time. According to the distribution condition of the pre-monitoring points, a plurality of branch inhaul cables are arranged to be connected with the main bearing inhaul cable, each branch inhaul cable independently measures the stress condition of each monitoring point, and the main bearing inhaul cable measures the total stress condition of all branch inhaul cables. If the landslide body to be monitored has a downward sliding trend under the influence of potential energy, the tension of the corresponding branch inhaul cable can be caused to change, the landslide body to be monitored can be converted into an electric signal through the force transducer and remotely transmitted to a remote monitoring end, and the remote monitoring end carries out real-time monitoring and early warning. The tensile force value is in direct proportion to the tensile deformation of the tension spring, and meanwhile, the displacement distance value of the landslide body can be converted, and meanwhile, the purpose of displacement monitoring is achieved.
The beneficial effects of the application are as follows:
the method can directly monitor the potential energy trend of the landslide body by a inhaul cable type force measuring mode, and has the characteristics of simple implementation, low cost, high coverage density of regional monitoring points and early discovery of landslide symptoms.
The device provided by the application is a field real-time on-line monitoring device capable of monitoring landslide trend on a potential landslide and collapsed mountain for a long time.
Drawings
FIG. 1 is a schematic side cross-sectional view of a landslide mountain body equipped with a surface cable dynamometric geological disaster automatic monitoring device;
FIG. 2 is a schematic elevation view of a landslide mountain with a surface-inhaul-cable-force-measuring type geological disaster automatic monitoring device installed;
fig. 3 is an enlarged schematic view of an installation surface cable force measurement type geological disaster automation monitoring device.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the detailed description is presented by way of example only and is not intended to limit the application.
The core of the application is that: the method has the advantages that the density of the monitoring coverage points is high, the monitoring method is direct, the evolution trend of landslide disasters is found earlier through mechanical measurement, and the method is remarkably different from the existing monitoring of the surface displacement and the monitoring after the landslide body is displaced and slid.
Example 1
Referring to fig. 1, the surface inhaul cable force measurement type geological disaster automatic monitoring device according to the embodiment comprises: the system comprises a remote monitoring end and a tension testing unit;
the tension test unit comprises a fixed pile 3 and a tension net, wherein the tension net comprises a main bearing cable, 5 branch cables and 5 anchor piles 5 with pre-monitoring points;
the fixed pile 3 is arranged at the mountain top of the mountain body of the landslide to be monitored, one end of the main bearing cable 4-0 is connected with the fixed pile 3 through a main force transducer, the other end of the main bearing cable 4-0 is connected with three corresponding anchor piles (5-3, 5-4, 5-5) with pre-monitoring points through three branch cables (4-3, 4-4 and 4-5), and two branch force transducers 6-1 and 6-2 are further arranged on the cable body of the main bearing cable 4-0; and the main force transducer and all the branch force transducers are connected with the remote monitoring end in a wireless communication manner.
A more detailed explanation is:
the branch inhaul cables are in one-to-one correspondence with anchor piles of the pre-monitoring points, and inhaul cable bodies of any two branch inhaul cables are not crossed.
The branch force transducer 6-1 is connected with the pre-monitoring point anchor pile 5-1 through a branch inhaul cable 4-1, the branch force transducer 6-2 is connected with the pre-monitoring point anchor pile 5-2 through a branch inhaul cable 4-2, the branch force transducer 6-3 is connected with the pre-monitoring point anchor pile 5-3 through a branch inhaul cable 4-3, the branch force transducer 6-4 is connected with the pre-monitoring point anchor pile 5-4 through a branch inhaul cable 4-4, and the branch force transducer 6-5 is connected with the pre-monitoring point anchor pile 5-5 through a branch inhaul cable 4-5.
And secondly, a pretightening spring is arranged between the main bearing inhaul cable and the main force sensor and between the branch inhaul cable and the anchor pile of the pre-monitoring point. The device is respectively marked as a pre-tightening spring 7-0, a pre-tightening spring 7-1, a pre-tightening spring 7-2, a pre-tightening spring 7-3, a pre-tightening spring 7-4 and a pre-tightening spring 7-5.
The main force transducer 6-0 is connected with the fixed pile 3 through a main force-bearing inhaul cable 4-0, and a pre-tightening spring 7-0 is further arranged between the main force transducer 6-0 and the main force-bearing inhaul cable 4-0.
And thirdly, arranging the anchor piles of the pre-monitoring points on the landslide to be monitored.
Example 2
The embodiment is based on an automated monitoring method of the surface inhaul cable force measurement type geological disaster automated monitoring device of embodiment 1, the method comprising:
s1, acquiring a landslide A to be monitored, and setting a plurality of anchor piles with pre-monitoring points on the landslide A to be monitored;
a fixed pile is arranged on the mountain top of the mountain where the landslide A to be monitored is located, the fixed pile is connected with a main bearing cable through a main force transducer, and each anchor pile of the pre-monitoring point is connected with the main bearing cable through a branch force transducer and a branch cable corresponding to the anchor pile one by one; a pre-tightening spring is arranged between the main bearing inhaul cable and the main force sensor and between the branch inhaul cable and the anchor pile of the pre-monitoring point;
after tensioning all the pre-tightening springs, finishing the installation of a tension net A on a landslide A to be monitored, taking the measured values of a current main force transducer and each branch force transducer as basic monitoring values of the tension net A, and acquiring and recording the basic monitoring values of the tension net A by a remote monitoring end;
s2, the remote monitoring end obtains a real-time measured value of the main force transducer, judges whether the real-time measured value of the main force transducer is different from a basic monitored value, if so, a landslide A to be monitored is likely to slide, and enters S3; if not, the landslide A to be monitored is unlikely to slide;
and S3, the remote monitoring end acquires real-time measurement values of the branch force transducers, and a landslide trend of the landslide A to be monitored is obtained on the basis of comparison between the real-time measurement values of the branch force transducers and basic monitoring values of the branch force transducers.
In practical application, if the potential landslide body 2 is sent to the trend of slipping downwards, the potential energy force or displacement of slipping can be transmitted to all the inhaul cables through each pre-monitoring point pile, so that the pre-tightening force of the original tension net is changed, the change trend can convert the force change value into corresponding electric signals through each force measuring sensor, and the corresponding electric signals are transmitted to the remote monitoring end through electronic measurement, so that the remote monitoring end can judge, analyze and early warn. In a certain range, the tension change of the pretightening force spring and the length of the pretightening force spring are in linear relation, and the distance value of sliding in the sliding direction of the sliding body can also be indirectly measured.
The layout of the tension net and the installation position of the force transducer are related to the arrangement of site pre-monitoring point piles, and the tension net and the installation position of the force transducer are required to be reasonably laid out according to site conditions. As shown in the detail enlarged view of fig. 3, a main bearing cable 4-0 led out from a fixed pile 3 is connected with each pre-monitoring point pile, a main force sensor 6-0 is installed on the main bearing cable 4-0 connected with the fixed pile 3, the change of any point of the whole tension net can cause the change of the measured value of the main force sensor 6-0, each branch cable is connected with the main bearing cable 4-0 at a proper position to form a proper tension net shape, each branch cable is respectively provided with a force sensor, each pre-monitoring point pile in any monitoring direction has a displacement trend, the measured value of the corresponding branch force sensor can be caused to change, and the effective landslide potential energy trend can be monitored by integrating the measured value change of each force sensor of the whole tension net.
The main bearing inhaul cable 4-0 and each branch inhaul cable provide pre-tightening tension for the whole tension net through corresponding pre-tightening tension springs, so that the whole system participates in a potential energy system of a landslide body, an initial pre-tightening force measured value of each force transducer is used as a system and a basic monitoring value, and a continuous change curve which occurs on the basic monitoring value at the later stage is used as an observation curve. The fixed piles 3 are generally arranged at the top of the mountain, the rear edge of the landslide body is stable on the mountain, and a plurality of main inhaul cables can be led out from the fixed piles according to the needs of monitoring terrains.
By long-term continuous observation of the automatic monitoring method, a data calculation model can be established according to the spatial layout of monitoring points, trends of landslide are comprehensively analyzed with factors such as on-site climate, temperature, humidity and rainfall, early warning decisions are made, and the purpose of monitoring is achieved.
By adopting the technical scheme disclosed by the application, the following beneficial effects are obtained:
the method is not influenced by the surface appearance of the landslide monitoring body and the surface vegetation coverage, can be quickly installed according to the arrangement of local conditions, is a general easy-to-purchase device such as a force transducer and a steel wire rope, has the characteristics of direct monitoring method, convenient monitoring data conversion, low energy consumption required by the monitoring device, convenient field power supply, low distribution cost and increased monitoring density, and meanwhile, the method can find early signs of the landslide, has good monitoring effect and is suitable for long-term monitoring in the field.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which is also intended to be covered by the present application.
Claims (2)
1. An automated monitoring device for surface inhaul cable force measurement type geological disasters, which is characterized by comprising: the system comprises a remote monitoring end and at least one tension testing unit;
each tension test unit comprises a fixed pile and at least one tension net, each tension net comprises a main bearing cable, n branch cables and n anchor piles with pre-monitoring points, and n is more than or equal to 1;
the fixing pile is arranged at the mountain top of a mountain to be detected, one end of the main bearing cable is connected with the fixing pile through a main force transducer, the other end of the main bearing cable is connected with a pre-monitoring point anchor pile through a branch cable, a plurality of branch force transducers are arranged on the cable body of the main bearing cable, and each branch force transducer is connected with the pre-monitoring point anchor pile through a branch cable;
the main force transducer and all the branch force transducers are in wireless communication connection with the remote monitoring end;
the branch inhaul cables are in one-to-one correspondence with anchor piles of the pre-monitoring points, and inhaul cable bodies of any two branch inhaul cables are not crossed;
a pre-tightening spring is arranged between the main bearing inhaul cable and the main force transducer and between the branch inhaul cable and the branch force transducer;
one end of the main bearing cable is connected with the fixed pile through a main force transducer, the other end of the main bearing cable is connected with more than two branch cables, and each branch cable is connected with a pre-monitoring point anchor pile;
and the anchor piles of the pre-monitoring points are arranged on the landslide to be monitored.
2. An automated monitoring method based on the surface inhaul cable force-measuring type geological disaster automated monitoring device as claimed in claim 1, wherein the method comprises:
s1, acquiring a landslide A to be monitored, and setting a plurality of anchor piles with pre-monitoring points on the landslide A to be monitored;
a fixed pile is arranged on the mountain top of the mountain where the landslide A to be monitored is located, the fixed pile is connected with a main bearing cable through a main force transducer, and each anchor pile of the pre-monitoring point is connected with the main bearing cable through a branch force transducer and a branch cable corresponding to the anchor pile one by one; a pre-tightening spring is arranged between the main bearing inhaul cable and the main force transducer and between the branch inhaul cable and the branch force transducer;
after tensioning all the pre-tightening springs, finishing the installation of a tension net A on a landslide A to be monitored, taking the measured values of a current main force transducer and each branch force transducer as basic monitoring values of the tension net A, and acquiring and recording the basic monitoring values of the tension net A by a remote monitoring end;
s2, the remote monitoring end obtains a real-time measured value of the main force transducer, judges whether the real-time measured value of the main force transducer is different from a basic monitored value, if so, a landslide A to be monitored is likely to slide, and enters S3; if not, the landslide A to be monitored is unlikely to slide;
and S3, the remote monitoring end acquires real-time measurement values of the branch force transducers, and a landslide trend of the landslide A to be monitored is obtained on the basis of comparison between the real-time measurement values of the branch force transducers and basic monitoring values of the branch force transducers.
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| CN201710380207.XA CN107014328B (en) | 2017-05-25 | 2017-05-25 | Surface inhaul cable force measuring type geological disaster automatic monitoring device and method |
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| CN201710380207.XA CN107014328B (en) | 2017-05-25 | 2017-05-25 | Surface inhaul cable force measuring type geological disaster automatic monitoring device and method |
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| CN107014328B true CN107014328B (en) | 2023-09-26 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108387197A (en) * | 2018-05-21 | 2018-08-10 | 北京久感科技有限公司 | A kind of anchoring for ground displacement |
| CN113309110B (en) * | 2021-06-07 | 2022-09-06 | 重庆海发工程项目管理咨询有限公司 | Automatic monitoring system and method for foundation pit displacement |
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| CN107014328A (en) | 2017-08-04 |
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