Negative Poisson's ratio anchor cable and slope reinforcement monitoring system

Abstract

The invention discloses a negative Poisson's ratio anchor cable and a side slope reinforcement monitoring system, and relates to the field of side slope protection, the negative Poisson's ratio anchor cable comprises an outer anchoring section, an inner anchoring section, a tensioning section and a measuring assembly, and a grouting pipe is inserted in the middle of the outer anchoring section and the middle of the inner anchoring section in sequence; the tensioning section is sequentially inserted into the outer anchoring section and the inner anchoring section, the tensioning section comprises a plurality of anchoring ribs which are arranged in parallel, the anchoring ribs are arranged around the periphery of the grouting pipe, each anchoring rib is made of a negative Poisson's ratio material, and the peripheral wall of each anchoring rib is sequentially provided with a flexible conductive film, an insulating layer and a piezoelectric film from inside to outside; the measuring assembly comprises a resistance sensor and a current sensor which are arranged on the outer anchoring section. The piezoelectric film is used for being electrically connected with the resistance sensor, the current sensor and the external data collecting and processing assembly. Therefore, the tensile bearing capacity is improved, the monitored landslide is reinforced, the disaster resistance of the landslide is effectively improved, and the problem of missing detection is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of slope protection, and in particular to a negative Poisson's ratio anchor cable and a slope reinforcement monitoring system. Background Art

[0002] Landslides are a common geological disaster, a natural phenomenon in which a slope slides downward under the influence of gravity due to factors such as rainwater infiltration, river erosion, and earthquakes. Anchor cables are a geotechnical engineering structure widely used in slope support. Based on the principle of prestressing, anchor cables form a tensile connection between the structure and the stable bedrock, thereby improving its stability.

[0003] Currently, anchor cables are typically woven from numerous fine steel strands. These cables deform and expand to a certain degree when subjected to loads. When the slope experiences significant deformation, the cables may be unable to withstand the load and break. Furthermore, traditional point sensors often have blind spots, potentially missing the most dangerous parts of the object being measured, resulting in a lack of timely warning of landslide deformation. Summary of the Invention

[0004] The main purpose of the present invention is to propose a negative Poisson's ratio anchor cable and a slope reinforcement monitoring system, aiming to solve the above problems.

[0005] To achieve the above object, the present invention proposes a negative Poisson's ratio anchor cable, comprising:

[0006] External anchoring section, used to be located outside the anchor hole on the slope;

[0007] The inner anchoring section is used to be arranged in the anchor hole, and the middle part of the outer anchoring section and the middle part of the inner anchoring section are used for inserting a grouting pipe in sequence;

[0008] A tensioning section is sequentially inserted into the outer anchoring section and the inner anchoring section, the tensioning section includes a plurality of anchoring bars arranged in parallel, the plurality of anchoring bars are arranged around the outer periphery of the grouting pipe, each anchoring bar is made of a negative Poisson's ratio material, and the outer peripheral wall of each anchoring bar is sequentially provided with a flexible conductive film, an insulating layer and a piezoelectric film from the inside to the outside; and

[0009] The measuring component includes a resistance sensor and a current sensor arranged in the outer anchoring section, the resistance sensor is used to monitor the resistance of the flexible conductive film, the current sensor is used to monitor the current of the piezoelectric film, and the piezoelectric film is used to be electrically connected to the resistance sensor, the current sensor, and the external data acquisition and processing component.

[0010] Optionally, the negative Poisson's ratio anchor cable further includes a plurality of positioning rings, which are arranged in the anchor hole, sleeved outside the tensioning section, and spaced apart along the extension direction of the tensioning section.

[0011] Optionally, the distance between any two adjacent positioning rings is greater than or equal to 1.5 m and less than or equal to 2 m.

[0012] Optionally, the negative Poisson's ratio anchor cable further includes an isolation sleeve, which is sleeved outside the free section of the tensioning section.

[0013] Optionally, the outer anchoring section is penetrated by a first grouting hole and a plurality of first reinforcement holes, the first grouting hole is provided in the middle of the outer anchoring section, and the plurality of first reinforcement holes are provided on the periphery of the first grouting hole and are spaced apart along the circumference of the first grouting hole;

[0014] The inner anchoring section includes an upper bearing plate, a lower bearing plate and a plurality of extrusion sleeves, wherein the lower bearing plate and the upper bearing plate are sequentially spaced apart in the inner and outer directions of the anchor hole, and the upper bearing plate is penetrated by a second grouting hole and a plurality of second reinforcement holes in the middle, and the lower bearing plate is penetrated by a third grouting hole and a plurality of third reinforcement holes;

[0015] The second grouting hole and the third grouting hole are respectively arranged corresponding to the first grouting hole and are connected to form a grouting channel for the grouting pipe to be inserted;

[0016] The plurality of second rib penetration holes and the plurality of third rib penetration holes are respectively arranged corresponding to the plurality of first rib penetration holes, and the plurality of extrusion sleeves are pressed between the upper bearing plate and the lower bearing plate, and are arranged one-to-one corresponding to the plurality of second rib penetration holes of the upper bearing plate, and the corresponding first rib penetration holes, second rib penetration holes, extrusion sleeves and third rib penetration holes are connected to form an anchoring channel for inserting one of the anchor bars.

[0017] Optionally, the inner anchoring section further includes a guide cap, and the guide cap cover is provided on the lower side of the lower bearing plate.

[0018] Optionally, the outer anchoring section includes a concrete pier, an anchor plate and an anchor arranged in sequence along the inner and outer directions of the anchor hole, and the concrete pier, the anchor plate and the anchor are respectively penetrated by the first grouting hole and the plurality of first reinforcement holes.

[0019] The present invention also provides a slope reinforcement monitoring system, which includes:

[0020] A plurality of negative Poisson's ratio anchor cables, wherein the plurality of negative Poisson's ratio anchor cables are installed in a one-to-one correspondence at a plurality of anchor holes on the slope;

[0021] A grouting assembly includes a material preparation barrel, a grouting pump, and a grouting pipe, one end of the grouting pipe being connected to the material preparation barrel via the grouting pump, and the other end being connected to a grouting pipe inserted into the negative Poisson's ratio anchor cable, so that the slurry in the material preparation barrel is transported to the anchor hole via the grouting pipe;

[0022] a data collection assembly, located on the slope, comprising a wind speed measuring device, a weather measuring device, and a rainfall measuring device; and

[0023] A data acquisition and processing component, comprising a data collector, an early warning device, and a data processing terminal, wherein the data collector is electrically connected to the negative Poisson's ratio anchor cable, the data collection component, and the data processing terminal to obtain monitoring data of the negative Poisson's ratio anchor cable and the data collection component, and wirelessly transmit the data to the data processing terminal for processing; the data processing terminal is electrically connected to the early warning device to control the working state of the early warning device according to the processing results of the data transmitted by the data collector;

[0024] Wherein, the negative Poisson's ratio anchor cable comprises:

[0025] External anchoring section, used to be located outside the anchor hole on the slope;

[0026] The inner anchoring section is used to be arranged in the anchor hole, and the middle part of the outer anchoring section and the middle part of the inner anchoring section are used for inserting a grouting pipe in sequence;

[0027] A tensioning section is sequentially inserted into the outer anchoring section and the inner anchoring section, the tensioning section includes a plurality of anchoring bars arranged in parallel, the plurality of anchoring bars are arranged around the outer periphery of the grouting pipe, each anchoring bar is made of a negative Poisson's ratio material, and the outer peripheral wall of each anchoring bar is sequentially provided with a flexible conductive film, an insulating layer and a piezoelectric film from the inside to the outside; and

[0028] The measuring component includes a resistance sensor and a current sensor arranged in the outer anchoring section, the resistance sensor is used to monitor the resistance of the flexible conductive film, the current sensor is used to monitor the current of the piezoelectric film, and the piezoelectric film is used to be electrically connected to the resistance sensor, the current sensor, and the external data acquisition and processing component.

[0029] Optionally, the wind speed measuring device includes a fan, which is electrically connected to the data acquisition and processing component and is used to measure wind speed and collect wind energy to power the data acquisition and processing component; and / or,

[0030] The weather measuring device includes a solar panel, which is electrically connected to the data acquisition and processing component and is used to measure the weather and collect solar energy to power the data acquisition and processing component; and / or,

[0031] The rainfall measuring device includes a tipping bucket rain gauge, the tipping bucket rain gauge is electrically connected to the data acquisition and processing component, and is used to measure rainfall; and / or,

[0032] The early warning device includes an audible and visual alarm, which is electrically connected to the data collector. Optionally, the grouting assembly also includes a pressure regulating valve and a pressure gauge provided on the grouting pipe, the pressure gauge is used to monitor the grouting pressure, and the pressure regulating valve is used to adjust the grouting pressure.

[0033] In the technical solution of the present invention, the anchor bar is made of a negative Poisson's ratio material. The negative Poisson's ratio material will expand laterally under unidirectional tension, thereby improving the tensile bearing capacity and providing a better response to transient impacts. When a landslide may deform significantly, the anchor cable is prevented from suddenly failing, thereby reinforcing the monitored landslide and effectively improving the disaster resistance of the landslide. In addition, the outer peripheral wall of each anchor bar is provided with a flexible conductive film, an insulating layer, and a piezoelectric film in sequence from the inside to the outside. The flexible conductive film has excellent ductility, is sensitive to deformation, has a large strain range, and has high resolution and accuracy. Through the specific relationship between its resistance and strain, it can efficiently monitor the strain at any position of the anchor cable and the degree of deformation of the landslide, avoiding the problem of missed detection, and solving the problem that traditional point sensors have blind spots and cannot perform diversified monitoring. In addition, the measurement information of the measurement component can be transmitted to the data acquisition and processing component through the piezoelectric film for processing. The piezoelectric film can convert mechanical vibration energy into electrical energy, which can power electrical equipment and save power consumption of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 A schematic structural diagram of an embodiment of a negative Poisson's ratio anchor cable provided by the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the tensioning section of the medium negative Poisson's ratio anchor cable;

[0037] Figure 3 for Figure 1 Schematic diagram of the partial structure of the inner anchoring section of the medium negative Poisson's ratio anchor cable;

[0038] Figure 4 for Figure 3 Schematic diagram of the structure of the upper bearing plate of the middle and inner anchoring section;

[0039] Figure 5 for Figure 1 Schematic diagram of the structure of the positioning ring of the medium negative Poisson's ratio anchor cable;

[0040] Figure 6 A partial structural diagram of an embodiment of a slope reinforcement monitoring system provided by the present invention;

[0041] Figure 7 This is a partial structural diagram of an embodiment of the slope reinforcement monitoring system provided by the present invention.

[0042] Description of Figure Numbers:

[0043] Label name Label name 100 Negative Poisson's ratio anchor cable 42 Current sensor 1 External anchoring section 5 Grouting pipe 11 Concrete pier 6 locating ring 12 anchor plate 7 Isolation sleeve 13 Anchor 200 Grouting components 2 Inner anchor section 201 Material barrel 21 Upper loading plate 202 Grouting pump 211 Second grouting hole 203 Grouting pipe 212 Second piercing hole 204 pressure regulating valve 22 Lower load plate 205 pressure gauge 221 The third grouting hole 206 Admixture Adder 222 The third reinforcement hole 207 blender 23 Extrusion sleeve 208 stirring motor 24 Guide cap 300 Data Collection Component 25 tie rod screw 301 Wind speed measuring device 26 Fastening nut 302 Weather measuring devices 3 Tension section 303 Rain gauge 31 Anchor bars 400 Data acquisition and processing components 32 Flexible conductive film 401 Data Collector 33 insulation layer 402 Early Warning Device 34 Piezoelectric film 2000 slope 4 Measuring components 2100 anchor hole 41 resistance sensor

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] Landslides are a common geological disaster, a natural phenomenon in which a slope slides downward under the influence of gravity due to factors such as rainwater infiltration, river erosion, and earthquakes. Anchor cables are a geotechnical engineering structure widely used in slope support. Based on the principle of prestressing, anchor cables form a tensile connection between the structure and the stable bedrock, thereby improving its stability.

[0049] Currently, anchor cables are typically woven from numerous fine steel strands. These cables deform and expand to a certain degree when subjected to loads. When the slope experiences significant deformation, the cables may be unable to withstand the load and break. Furthermore, traditional point sensors often have blind spots, potentially missing the most dangerous parts of the object being measured, resulting in a lack of timely warning of landslide deformation.

[0050] In view of this, the present invention provides a negative Poisson's ratio anchor cable 100. Figures 1 to 5 This is an embodiment of a negative Poisson's ratio anchor cable 100 provided by the present invention.

[0051] See also Figures 1 to 5 The negative Poisson's ratio anchor cable 100 includes an outer anchoring section 1, an inner anchoring section 2, a tensioning section 3 and a measuring component 4. The outer anchoring section 1 is used to be arranged outside the anchor hole 2100, and the inner anchoring section 2 is used to be arranged inside the anchor hole 2100. A grouting pipe 5 is inserted in the middle of the outer anchoring section 1 and the middle of the inner anchoring section 2 in turn; the tensioning section 3 is inserted in the outer anchoring section 1 and the inner anchoring section 2 in turn, and the tensioning section 3 includes a plurality of anchoring bars 31 arranged in parallel. The plurality of anchoring bars 31 are arranged around the outer periphery of the grouting pipe 5, and each of the anchoring bars 31 is made of negative Poisson's ratio material, and the outer wall of each anchoring rib 31 is provided with a flexible conductive film 32, an insulating layer 33 and a piezoelectric film 34 in sequence from the inside to the outside; the measuring component 4 includes a resistance sensor 41 and a current sensor 42 provided on the outer anchoring section 1, the resistance sensor 41 is used to monitor the resistance of the flexible conductive film 32, the current sensor 42 is used to monitor the current of the piezoelectric film 34, and the piezoelectric film 34 is used to be electrically connected to the resistance sensor 41, the current sensor 42, and the external data acquisition and processing component 400.

[0052] In the technical solution of the present invention, the anchor bar 31 is made of negative Poisson's ratio material. The negative Poisson's ratio material will expand laterally under unidirectional tension, thereby improving the tensile bearing capacity and having a better response to instantaneous impact. When the landslide may undergo large deformation, it prevents the anchor cable from suddenly failing, thereby reinforcing the monitored landslide and effectively improving the disaster resistance of the landslide. The outer peripheral wall of each anchor bar 31 is provided with a flexible conductive film 32, an insulating layer 33 and a piezoelectric film 34 in sequence from the inside to the outside. The flexible conductive film 32 has excellent ductility and is sensitive to deformation. The piezoelectric film 34 has a large strain range, high resolution and accuracy. Through the specific relationship between its resistance and strain, the strain at any position of the anchor cable and the deformation degree of the landslide can be efficiently monitored to avoid missed detection problems, and solve the problem that traditional point sensors have blind spots and cannot perform diversified monitoring. In addition, the measurement information of the measuring component 4 can be transmitted to the data acquisition and processing component 400 for processing through the piezoelectric film 34, and the piezoelectric film 34 can convert mechanical vibration energy into electrical energy, which can power electrical equipment and save power consumption of electrical equipment.

[0053] It should be noted that negative Poisson's ratio materials are materials with unique mechanical properties. Their Poisson's ratio is negative, meaning they expand laterally when stretched and contract laterally when compressed. Specifically, negative Poisson's ratio materials include epoxy resins, fiber-reinforced composites, polyurethane foam, or microporous ceramics.

[0054] Specifically, in one embodiment of the present invention, the flexible conductive film 32 is made of a flexible colloid material containing carbon black or graphene, and the flexible colloid material is evenly coated on the outer peripheral wall of the anchoring rib 31 through a brushing process.

[0055] Specifically, the insulating layer 33 is prepared by coating an insulating material on the flexible conductive film 32. Furthermore, the insulating layer 33 is bonded to the piezoelectric film 34.

[0056] For details, please refer to Figure 1 and Figure 5 The negative Poisson's ratio anchor cable 100 further includes a plurality of positioning rings 6, which are disposed within the anchor hole 2100 and sleeved over the tensioning section 3, and are spaced apart along the extension direction of the tensioning section 3. Thus, the positioning rings 6 disposed within the anchor hole 2100 center the tensioning section 3 in the middle of the anchor hole 2100, providing anchoring force.

[0057] Furthermore, the distance between any two adjacent positioning rings 6 is greater than or equal to 1.5 m and less than or equal to 2 m, ensuring that the tensioning section 3 is straight.

[0058] For details, please refer to Figure 1The negative Poisson's ratio anchor cable 100 further includes an isolation sleeve 7, which is sleeved outside the free section of the tensioning section 3 to ensure that the free section can move freely during tensioning.

[0059] For details, please refer to Figure 3 and Figure 4 The outer anchoring section 1 is penetrated by a first grouting hole and a plurality of first reinforcing holes, the first grouting hole is arranged in the middle of the outer anchoring section 1, and the plurality of first reinforcing holes are arranged on the outer periphery of the first grouting hole and are spaced apart along the circumference of the first grouting hole; the inner anchoring section 2 includes an upper bearing plate 21, a lower bearing plate 22 and a plurality of extrusion sleeves 23, the lower bearing plate 22 and the upper bearing plate 21 are sequentially spaced apart along the inner and outer directions of the anchor hole 2100, and the upper bearing plate 21 is penetrated by a second grouting hole 211 and a plurality of second reinforcing holes 212 located in the middle, and the lower bearing plate 22 is penetrated by a third grouting hole 221 and a plurality of third reinforcing holes Hole 222; the second grouting hole 211 and the third grouting hole 221 are respectively arranged corresponding to the first grouting hole, and are connected to form a grouting channel for the grouting pipe 5 to be inserted; the multiple second reinforcement holes 212 and the multiple third reinforcement holes 222 are respectively arranged corresponding to the multiple first reinforcement holes, and the multiple extrusion sleeves 23 are pressed between the upper bearing plate 21 and the lower bearing plate 22, and are arranged one by one corresponding to the multiple second reinforcement holes 212 of the upper bearing plate 21, and the corresponding first reinforcement holes, second reinforcement holes 212, extrusion sleeves 23 and third reinforcement holes 222 are connected to form an anchoring channel for the insertion of one of the anchor bars 31.

[0060] For more details, see Figure 1 After the anchor bar 31 passes through the lower bearing plate 22 through the third bar hole 222, a space of 2 to 3 cm is reserved to prevent slipping.

[0061] Furthermore, the upper supporting plate 21 and the lower supporting plate 22 are fixedly connected by at least one tie rod screw 25 and at least two fastening nuts 26. The tie rod screw 25 is arranged to pass through the upper supporting plate 21 and the lower supporting plate 22 in the up and down directions, and the two ends of the tie rod screw 25 are respectively threadedly connected to the fastening nut 26. The upper supporting plate 21 and the lower supporting plate 22 are located between the two fastening nuts 26.

[0062] For further information, see Figure 1 The inner anchoring section 2 also includes a guide cap, and the guide cap cover 25 is arranged on the lower side of the lower bearing plate 22. The guide cap can reduce the friction between the negative Poisson's ratio anchor cable 100 and the inner wall of the anchor hole 2100, so that the negative Poisson's ratio anchor cable 100 can be stably placed in the anchor hole 2100.

[0063] For details, please refer to Figure 1 The outer anchoring section 1 includes a concrete pier 11, an anchor plate 12, and an anchor 13, which are sequentially arranged along the inner and outer sides of the anchor hole 2100. The concrete pier 11, the anchor plate 12, and the anchor 13 are each penetrated by the first grouting holes and a plurality of the first reinforcement holes. Thus, when the anchor 13 is used to tension and anchor the upper end of the tensioning section 3, the anchor 13 transfers prestress to the anchor plate 12, which in turn transfers the load to the concrete pier 11. The concrete pier 11 then transfers the load to the soil being tested, thereby enhancing the stability of the entire structure.

[0064] The present invention also provides a slope reinforcement monitoring system, please refer to Figure 6 and Figure 7 The slope reinforcement monitoring system includes a plurality of negative Poisson's ratio anchor cables 100, a grouting assembly 200, a data collection assembly 300, and a data acquisition and processing assembly 400. The plurality of negative Poisson's ratio anchor cables 100 are installed one by one at a plurality of anchor holes 2100 of the slope 2000; the grouting assembly 200 includes a material making barrel 201, a grouting pump 202 and a grouting pipe 203. One end of the grouting pipe 203 is connected to the material making barrel 201 through the grouting pump 202, and the other end is connected to the grouting pipe 5 inserted in the negative Poisson's ratio anchor cable 100, so that the slurry in the material making barrel 201 is transported to the anchor hole 2100 through the grouting pipe 5; the data collection assembly 300 is arranged at the The slope 2000 includes a wind speed measuring device 301, a weather measuring device 302 and a rainfall measuring device 303; the data acquisition and processing component 400 includes a data collector 401, an early warning device 402 and a data processing terminal. The data collector 401 is electrically connected to the negative Poisson's ratio anchor cable 100, the data collection component 300 and the data processing terminal to obtain monitoring data of the negative Poisson's ratio anchor cable 100 and the data collection component 300, and wirelessly transmit the data to the data processing terminal for processing. The data processing terminal is electrically connected to the early warning device 402 to control the working state of the early warning device 402 according to the processing results of the data transmitted by the data collector 401.

[0065] In the technical solution of the present invention, the grouting assembly 200 is used to grout the negative Poisson's ratio anchor cable 100 so that the slurry fills the entire anchor hole 2100. After the slurry solidifies, the tensioning device is used to tension the tensioning section 3 of the negative Poisson's ratio anchor cable 100, and it is fixed after reaching prestress. Then, the resistance sensor 41 of the negative Poisson's ratio anchor cable 100 monitors the resistance of the flexible conductive film 32, and the current sensor 42 monitors the current of the piezoelectric film 34. The wind speed is measured by the wind speed measuring device 301, the weather is measured by the weather measuring device 302, and the rainfall is measured by the rainfall measuring device 303. The measured monitoring data is collected and transmitted to the data processing terminal for processing and analysis by the data collector 401, and compared with the preset threshold stored therein. If the preset threshold is exceeded, the early warning device 402 is controlled to issue an alarm. If the preset threshold is not exceeded, the data is stored and monitoring continues. In this way, the slope reinforcement monitoring system provided by the present invention can establish a visual landslide stress field and strain field. By monitoring the vibration of the anchor cable and the environmental rainfall and wind speed, it can comprehensively consider the state of the landslide and identify the trend of landslide deformation (such as initial creep and accelerated sliding). Then, it sets the safety threshold and issues an early warning, thereby realizing efficient monitoring and early warning of landslide deformation.

[0066] It should be noted that the negative Poisson's ratio anchor 100 grouting adopts the negative Poisson's ratio anchor 100 grouting as described above, that is, the slope reinforcement monitoring system has all the technical features of all the embodiments of the above-mentioned negative Poisson's ratio anchor 100 grouting, and also has all the technical effects brought about by all the above-mentioned technical features, which will not be repeated here one by one.

[0067] Furthermore, the wind speed measuring device 301 includes a wind turbine, which is electrically connected to the data collector 401 and the early warning device 402 and is used to measure wind speed and collect wind energy to power the data collector 401 and the early warning device 402 .

[0068] Specifically, the weather measuring device 302 includes a solar panel, which is electrically connected to the data collector 401 and the early warning device 402 and is used to measure the weather and collect solar energy to power the data collector 401 and the early warning device 402 .

[0069] Specifically, the rainfall measuring device 303 includes a tipping bucket rain gauge, which is electrically connected to the data collector 401 and is used to measure rainfall.

[0070] Specifically, the early warning device 402 includes an audible and visual alarm, and the audible and visual alarm is electrically connected to the data collector 401 and the data processing terminal.

[0071] It should be noted that, in the present invention, the above technical features can be set one by one, two by two, or three by three, or can be set simultaneously. Specifically, in one embodiment of the present invention, the above technical features are set simultaneously, that is, the wind speed measuring device 301 includes a wind turbine, which is electrically connected to the data collector 401 and the early warning device 402, and is used to measure wind speed and collect wind energy to power the data collector 401 and the early warning device 402; the weather measuring device 302 includes a solar panel, which is electrically connected to the data collector 401 and the early warning device 402, and is used to measure weather and collect solar energy to power the data collector 401 and the early warning device 402; the rainfall measuring device 303 includes a tipping bucket rain gauge, which is electrically connected to the data collector 401 and the early warning device 402, and is used to measure rainfall; and the early warning device 402 includes an audible and visual alarm, which is electrically connected to the data collector 401 and the data processing terminal.

[0072] For more details, see Figure 6 The data collection component 300 also includes a support rod, the fan is arranged at the top of the support rod, the solar panel and the sound and light alarm are arranged on the side wall of the support rod and are located below the fan.

[0073] For details, please refer to Figure 7 The grouting assembly 200 also includes a pressure regulating valve 204 and a pressure gauge 205 provided on the grouting pipe 203. The pressure gauge 205 is used to monitor the grouting pressure, and the pressure regulating valve 204 is used to adjust the grouting pressure. In this way, the injection speed of the slurry is controlled by the pressure regulating valve 204 and the pressure gauge 205.

[0074] Further, see Figure 7 The grouting assembly 200 further includes an admixture adder 206, an agitator 207, and a stirring motor 208. The admixture adder 206 is connected to the material preparation barrel 201 and can add appropriate admixtures to the material preparation barrel 201 according to on-site construction requirements. The agitator 207 is provided in the material preparation barrel 201, and the stirring motor 208 is drivingly connected to the agitator 207 to drive the agitator 207 to stir the slurry in the material preparation barrel 201. In this way, various special slurries can be produced according to on-site construction requirements to meet project needs.

[0075] Further, see Figure 7 In one embodiment of the present invention, the material preparation barrel 201 is cylindrical, and the upper cover is provided with a sealing cover to prevent the slurry from splashing during stirring.

[0076] The present invention also provides an assembly method of a slope reinforcement monitoring system, which is applicable to the slope reinforcement monitoring system described above and specifically comprises the following steps:

[0077] S1. Determine the anchor hole location at the construction site.

[0078] S2. Drill the anchor hole and clean the sediment in the anchor hole to keep the hole wall clean.

[0079] It should be noted that, in this step, it is generally required that the hole depth be more than 0.5m deeper than the designed hole depth.

[0080] S3. Prepare the tensioning section of the negative Poisson's ratio anchor cable.

[0081] In this step, first, a flexible conductive film is coated on the outer wall of a single negative Poisson's ratio anchor bar and waited for it to solidify to form a strain sensing layer, and the resistance value is calibrated to ensure normal sensing function; then, the insulating material is diluted and evenly sprayed on the surface of the flexible conductive film, and waited for it to solidify to form an insulating layer; finally, the piezoelectric film is adhered to the surface of the insulating layer.

[0082] S4: Assembling the inner anchoring section of the negative Poisson's ratio anchor cable.

[0083] In this step, first, the lower end of each negative Poisson's ratio anchor bar is passed through the third reinforcement hole of the lower bearing plate, the extrusion sleeve, and the second reinforcement hole of the upper bearing plate in sequence, and each negative Poisson's ratio anchor bar is reserved 2 to 3 cm at the rear of the lower bearing plate to prevent slipping; then a pull rod screw is passed through the upper bearing plate and the lower bearing plate, and fixed with two fastening nuts to fix the upper bearing plate and the lower bearing plate at both ends of the extrusion sleeve; then a guide cap is welded on the lower side of the lower bearing plate to reduce the friction between the anchor cable and the hole wall, helping the negative Poisson's ratio anchor cable to be stably placed in the anchor hole; then a plurality of positioning rings are sleeved on the outer periphery of the tensioning section, with adjacent two positioning rings spaced 1.5 to 2 m apart to ensure that the anchor cable body is straight; then a grouting pipe is passed through the grouting through-hole of the positioning ring, the second grouting hole of the upper bearing plate, and the third grouting hole of the lower bearing plate in sequence until the lower end of the grouting pipe extends into the guide cap; finally, an isolation sleeve is sleeved on the outer periphery of the free section of the tensioning section.

[0084] S5. Inserting the inner anchoring section of the negative Poisson's ratio anchor cable into the anchor hole.

[0085] S6. Use grouting equipment to prepare slurry in the material preparation barrel.

[0086] In this step, according to the on-site construction requirements, an admixture adder can be used to add early strength agents, quick setting agents, etc. into the material preparation barrel, and a stirrer can be used to stir and prepare a special slurry.

[0087] S7. Grouting into the anchor hole.

[0088] In this step, first, the grouting pipe is connected to the grouting pipe, and the grouting pump provides power to perform grouting. The grouting speed is controlled by the pressure gauge and the pressure regulating valve to ensure that the slurry fills the entire anchor hole.

[0089] S8. Assemble the outer anchoring section of the negative Poisson's ratio anchor cable and fix the anchoring reinforcement.

[0090] In this step, first, after the slurry solidifies, a concrete pier is made at the hole mouth, an anchor plate is installed, and the anchor bar is tensioned by a tensioning device. After the prestress is reached, the anchor is locked and fixed by the anchor.

[0091] S9. Set up data collection components.

[0092] In this step, a resistance sensor and a current sensor are installed on the anchor plate, and a wind speed measuring device, a weather measuring device, and a rainfall measuring device are installed on the slope.

[0093] S10. Setting data acquisition and processing components.

[0094] In this step, a data collector and an early warning device are installed on the slope, and a wireless connection is set between the data collector and the data processing terminal.

[0095] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A negative Poisson's ratio anchor cable, characterized in that: The negative Poisson's ratio anchor cable comprises: External anchoring section, used to be located outside the anchor hole on the slope; The inner anchoring section is used to be arranged in the anchor hole, and the middle part of the outer anchoring section and the middle part of the inner anchoring section are used for inserting a grouting pipe in sequence; A tensioning section is sequentially inserted into the outer anchoring section and the inner anchoring section, the tensioning section includes a plurality of anchoring bars arranged in parallel, the plurality of anchoring bars are arranged around the outer periphery of the grouting pipe, each anchoring bar is made of a negative Poisson's ratio material, and the outer peripheral wall of each anchoring bar is sequentially provided with a flexible conductive film, an insulating layer and a piezoelectric film from the inside to the outside; and The measuring component includes a resistance sensor and a current sensor arranged in the outer anchoring section, the resistance sensor is used to monitor the resistance of the flexible conductive film, the current sensor is used to monitor the current of the piezoelectric film, and the piezoelectric film is used to be electrically connected to the resistance sensor, the current sensor, and the external data acquisition and processing component.

2. The negative Poisson's ratio anchor cable according to claim 1, characterized in that: The negative Poisson's ratio anchor cable further comprises a plurality of positioning rings, which are arranged in the anchor hole, sleeved outside the tensioning section, and spaced apart along the extension direction of the tensioning section.

3. The negative Poisson's ratio anchor cable according to claim 2, characterized in that: The distance between any two adjacent positioning rings is greater than or equal to 1.5 m and less than or equal to 2 m.

4. The negative Poisson's ratio anchor cable according to claim 1, characterized in that: The negative Poisson's ratio anchor cable further includes an isolation sleeve, which is sleeved outside the free section of the tensioning section.

5. The negative Poisson's ratio anchor cable according to claim 1, characterized in that: The outer anchoring section is penetrated by a first grouting hole and a plurality of first reinforcement holes, wherein the first grouting hole is provided in the middle of the outer anchoring section, and the plurality of first reinforcement holes are provided on the outer periphery of the first grouting hole and are spaced apart along the circumference of the first grouting hole; The inner anchoring section includes an upper bearing plate, a lower bearing plate and a plurality of extrusion sleeves, wherein the lower bearing plate and the upper bearing plate are sequentially spaced apart in the inner and outer directions of the anchor hole, and the upper bearing plate is penetrated by a second grouting hole and a plurality of second reinforcement holes in the middle, and the lower bearing plate is penetrated by a third grouting hole and a plurality of third reinforcement holes; The second grouting hole and the third grouting hole are respectively arranged corresponding to the first grouting hole and are connected to form a grouting channel for the grouting pipe to be inserted; The plurality of second rib penetration holes and the plurality of third rib penetration holes are respectively arranged corresponding to the plurality of first rib penetration holes, and the plurality of extrusion sleeves are pressed between the upper bearing plate and the lower bearing plate, and are arranged one-to-one corresponding to the plurality of second rib penetration holes of the upper bearing plate, and the corresponding first rib penetration holes, second rib penetration holes, extrusion sleeves and third rib penetration holes are connected to form an anchoring channel for inserting one of the anchor bars.

6. The negative Poisson's ratio anchor cable according to claim 5, characterized in that: The inner anchoring section further includes a guide cap, and the guide cap cover is arranged on the lower side of the lower bearing plate.

7. The negative Poisson's ratio anchor cable according to claim 5, characterized in that: The outer anchoring section includes a concrete pier, an anchor plate and an anchor arranged in sequence along the inner and outer directions of the anchor hole. The concrete pier, the anchor plate and the anchor are respectively penetrated by the first grouting hole and the plurality of first reinforcement holes.

8. A slope reinforcement monitoring system, characterized in that: The slope reinforcement monitoring system includes: A plurality of negative Poisson's ratio anchor cables according to any one of claims 1 to 7, wherein the plurality of negative Poisson's ratio anchor cables are installed in a one-to-one correspondence at a plurality of anchor holes on the slope; A grouting assembly includes a material preparation barrel, a grouting pump, and a grouting pipe, one end of the grouting pipe being connected to the material preparation barrel via the grouting pump, and the other end being connected to a grouting pipe inserted into the negative Poisson's ratio anchor cable, so that the slurry in the material preparation barrel is transported to the anchor hole via the grouting pipe; a data collection assembly, located on the slope, comprising a wind speed measuring device, a weather measuring device, and a rainfall measuring device; and The data acquisition and processing component includes a data collector, an early warning device and a data processing terminal. The data collector is electrically connected to the negative Poisson's ratio anchor cable, the data collection component and the data processing terminal to obtain monitoring data of the negative Poisson's ratio anchor cable and the data collection component, and wirelessly transmits the monitoring data to the data processing terminal for processing. The data processing terminal is electrically connected to the early warning device to control the working state of the early warning device according to the processing results of the data transmitted by the data collector.

9. The slope reinforcement monitoring system according to claim 8, characterized in that: The wind speed measuring device includes a fan, which is electrically connected to the data collector and the early warning device, and is used to measure wind speed and collect wind energy to power the data collector and the early warning device; and / or, The weather measuring device includes a solar panel, which is electrically connected to the data collector and the early warning device, and is used to measure the weather and collect solar energy to power the data collector and the early warning device; and / or, The rainfall measuring device includes a tipping bucket rain gauge, which is electrically connected to the data collector and is used to measure rainfall; and / or, The early warning device includes an audible and visual alarm, and the audible and visual alarm is electrically connected to the data collector and the data processing terminal.

10. The slope reinforcement monitoring system according to claim 8, characterized in that: The grouting assembly further comprises a pressure regulating valve and a pressure gauge provided on the grouting pipe, wherein the pressure gauge is used for monitoring the grouting pressure, and the pressure regulating valve is used for regulating the grouting pressure.

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