Embedded wire type road collapse monitoring and early warning device and method

Abstract

The present invention relates to the technical field of road collapse early warning, and more specifically to an embedded wire-type road collapse monitoring and early warning device and method, comprising: a borehole extending from a road surface layer to a target soil layer; a first anchoring structure, arranged at the bottom of the borehole and anchored to the target soil layer; a second anchoring structure, arranged at the top of the borehole and anchored to the road surface layer; and a pull rope. The present invention sets two anchoring points on the road surface layer and the target soil layer respectively, and the two anchoring points are connected by a prestressed pull rope. When a cavity develops under the target soil layer, the target soil layer loosens, and the tension of the prestressed pull rope is released. By monitoring the tension of the pull rope, it is possible to predict in advance that the target soil layer will collapse, and effectively give an early warning of the development of the cavity. In addition, the present application has little damage to the road, a simple structure, and is suitable for providing targeted collapse early warnings at the locations of cavities detected on the road.

Description

Technical Field

[0001] The present invention relates to the technical field of road collapse early warning, and in particular to an embedded wire-type road collapse monitoring and early warning device and method. Background Art

[0002] Road collapse is the process and phenomenon in which a road sinks downward due to natural or human factors, forming depressions or potholes on the road surface. In order to ensure the safe and smooth operation of urban infrastructure, ground penetrating radar is generally used to detect underground disease bodies on municipal roads, and to investigate and rectify underground disease bodies on urban roads.

[0003] Specifically, it includes: conducting geological radar detection on roads within the specified range, finding out whether there are abnormal defects such as cavities and voids in the soil below the road surface and around the pipelines within the specified range, finding out the basic parameters such as the location, size, and burial depth of the abnormalities, and assessing the risk level. It provides basic data for construction, design, and construction units so that they can take effective measures to eliminate safety hazards and ensure the safety of roads, buildings, and surrounding environments within the detection area.

[0004] Although regular geological radar detection can reflect the collapse of urban roads to a certain extent, the workload is too large, especially the selection of detection range and frequency is difficult. The prediction of risks depends on the frequency of detection. High-frequency detection will undoubtedly increase the burden on the municipal government, while low-frequency detection will bring safety hazards.

[0005] For example, as shown in Patent Document 1, although the pre-buried detection method can accurately reflect the development of cavities, it is not suitable for use on roads that are already in use. Therefore, after the underground cavity is detected by geological radar, how to conduct continuous, real-time, accurate, and low-cost effective monitoring of the cavity becomes an urgent problem to be solved.

[0006] Prior art literature

[0007] Patent document 1CN115240368A An IoT system for monitoring and early warning of urban road collapse Summary of the invention

[0008] The present invention provides an embedded wire-type road collapse monitoring and early warning device, comprising:

[0009] A borehole extending from the road surface to the target soil layer;

[0010] a first anchoring structure, arranged at the bottom of the borehole and anchored to the target soil layer;

[0011] a second anchoring structure, disposed on the top of the borehole and anchored to the road surface;

[0012] a pull rope having a first end connected to the first anchoring structure;

[0013] A stress detection component, wherein the stress detection component has a stress detection end;

[0014] Wherein, the stress detection component is fixed to the second anchoring structure, and the second end of the pull rope is connected to the stress detection end of the stress detection component, the pull rope is configured to have pre-tension stress, and the stress detection component is used to detect stress changes of the pull rope.

[0015] Preferably, the second anchoring structure comprises a shell and a prestressed adjusting component, the shell is fixed to the road surface layer by an anchor, a cavity is provided in the shell, and a channel for the pull rope to pass into the cavity is provided at the bottom of the shell;

[0016] The stress detection component is fixedly connected to the prestress adjustment component, and the prestress adjustment component is configured to be movable relative to the shell along the axis of the drilling hole to change the distance between the first end and the second end of the pull rope to change the prestress of the pull rope.

[0017] Preferably, the prestressed adjustment component is constructed in a columnar shape, the outer wall of the prestressed adjustment component is provided with threads, the channel of the shell is provided with threads, the prestressed adjustment component is threadedly connected to the shell, a through hole is provided at the axis of the prestressed adjustment component, and the pull rope is inserted into the cavity from the through hole.

[0018] Preferably, the stress detection component is arranged above the prestressed adjustment component, the second end of the pull rope is connected to the supporting structure, the stress detection component is constructed in a C shape and can be filled between the supporting structure and the prestressed adjustment component, and the upper end face or the lower end face of the stress detection component is set as the stress detection end.

[0019] Preferably, a clamping groove is provided on the outer wall of the prestressed pressure adjusting component, and a positioning groove is provided in the cavity. When the clamping groove is matched with the positioning groove, a positioning block inserted into the clamping groove and the positioning groove fixes the prestressed pressure adjusting component and the housing.

[0020] Preferably, the first anchoring structure comprises a resistance increasing structure capable of being embedded into the target soil layer along the radial direction of the borehole, and the resistance increasing structure is configured to be embedded into the target soil layer when a user operates the first anchoring structure to rotate.

[0021] Preferably, the pull rope includes a stainless steel rope or an aramid wire rope.

[0022] Preferably, the structural layer between the road surface layer and the target soil layer is defined as a hard shell layer, and the thickness of the hard shell layer is 2-3 m.

[0023] The second aspect of the present invention proposes a technical solution, a road collapse monitoring and early warning method, using the above-mentioned road collapse monitoring and early warning device, comprising the following steps:

[0024] Step 1, obtaining the ultimate tensile stress of the first anchoring structure in the target soil layer;

[0025] Step 2: using a drilling tool to form a borehole extending from the road surface layer to the target soil layer;

[0026] Step 3: deploy a road collapse monitoring and early warning device, and adjust the stress of the pull rope to be less than the ultimate tensile stress tested in step 3;

[0027] Step 4: The stress of the pull rope is collected through the stress detection component, and the collected signal is sent to the server regularly, and whether the target soil layer collapses is determined based on the stress change of the pull rope.

[0028] Preferably, in step 3, the prestress of the pull rope is changed by adjusting the distance between the prestress adjustment component and the housing.

[0029] Compared with the prior art, the advantages of the present invention are:

[0030] The present invention respectively sets two anchor points on the road surface and the target soil layer, and the two anchor points are connected by a prestressed rope. When a cavity develops under the target soil layer, the target soil layer loosens, and the tension of the prestressed rope is released. By monitoring the tension of the rope, it is possible to predict in advance that the target soil layer will collapse, and effectively give an early warning of the development of the cavity. In addition, the present application causes little damage to the road and has a simple structure, and is suitable for providing targeted collapse warnings at cavity locations detected on the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For clarity, not every component is labeled in every figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, in which:

[0032] Figure 1 It is a schematic diagram of the road surface layer collapsing downwards shown in the present invention;

[0033] Figure 2 It is a structural schematic diagram of the buried wire-type road collapse monitoring and early warning device shown in the present invention;

[0034] Figure 3 is a schematic diagram of the first anchoring structure shown in the present invention in a contracted state;

[0035] Figure 4is a schematic diagram of the first anchoring structure shown in the present invention in an expanded state;

[0036] Figure 5 is a structural schematic diagram of a second anchoring structure shown in the present invention;

[0037] Figure 6 It is a structural schematic diagram of the prestressed pressure adjusting component shown in the present invention;

[0038] Figure 7 is another structural schematic diagram of the first anchoring structure shown in the present invention; DETAILED DESCRIPTION

[0039] In order to better understand the technical content of the present invention, specific embodiments are given and described as follows in conjunction with the accompanying drawings.

[0040] Combination Figure 1 As shown, the road surface layer 100 is usually a paved road surface such as asphalt, cement, gravel, etc., below the road surface layer 100 is the road base layer, and below the road base layer is the soil layer. Generally, pipes 201 such as water pipes and electric wire pipes are buried at the bottom of urban roads. In particular, hollowing 202 is prone to occur around the water pipes 201. With the increase of time and the effect of the water environment, the hollowing 202 gradually develops into a cavity 200. The cavity 200 and the road surface layer 100 are defined as a hard shell layer. At this time, the hard shell layer is sufficient to support the load on the road surface layer 100. When the cavity 200 gradually expands, the road surface layer 100 may collapse slightly, as shown in the collapsed area 100". It is also possible that the cavity 200 expands to the point where the hard shell layer cannot support the load of the road surface layer 100, and a collapse pit is formed on the road surface.

[0041] Among them, the directly formed collapse pits are very harmful and sudden. At present, ground penetrating radar is generally used for underground cavities, which has a long detection cycle and cannot accurately predict the development of the cavities. The use of, for example, a magnetoresistive stratified sedimentation meter to warn of collapse has limitations. It specifically detects the displacement of the soil layer, and when the displacement occurs, the soil layer has already loosened and cannot provide early warning. The present application aims to detect the force of the soil of the target soil layer 102, and set two anchor points on the road surface layer 100 and the target soil layer 102 respectively. The two anchor points are connected by a prestressed rope. When the target soil layer 102 loosens, the tension of the prestressed rope is released, and it is determined that the target soil layer 102 is about to collapse. In this way, by detecting the stress of the target soil layer 102, early warning of the development of underground cavities can be provided.

[0042] It should be understood that the structural layer between the road surface layer 100 and the target soil layer 102 is defined as the hard shell layer 101. The hard shell layer 101 is a structure that can support the load on the road surface layer 100. If the hard shell layer 101 is destroyed (the bottom develops into a cavity 200), the road surface is at risk of collapse. Optionally, the thickness of the hard shell layer is 2-3m, which is determined by the strength of the soil layer. The soil layer below the target soil layer 102 is the cavity erosion layer 103.

[0043]

Buried pull-wire road collapse monitoring and early warning device

[0044] Combination Figure 2 As shown, the present invention proposes an embedded tension-wire road collapse monitoring and early warning device, including a borehole 40, a first anchoring structure 30, a second anchoring structure 10 and a tension rope 20. The borehole 40 extends from the road surface layer 100 to the target soil layer 102. The first anchoring structure 30 is set to the bottom of the borehole 40 and anchored to the target soil layer 102; the second anchoring structure 10 is set to the top of the borehole 40 and anchored to the road surface layer 100.

[0045] Furthermore, the first end of the pull rope 20 is connected to the first anchoring structure 30; the stress detection component 13 is fixed to the second anchoring structure 10, and the second end of the pull rope 20 is connected to the stress detection end of the stress detection component 13, the pull rope 20 is configured to have pre-tensioning stress, and the stress detection component 13 is used to detect the stress change of the pull rope 20.

[0046] The stress detection component 13 may be a tension or pressure or stress sensor, which is intended to detect the stress change of the pull rope 20 .

[0047] Optionally, the pull rope 20 includes a stainless steel rope or an aramid rope. The diameter of the pull rope 20 is about 2 mm.

[0048] In this way, the second anchoring structure 10 is fixed to the road surface 100 by anchoring. Since the road surface 100 has high hardness and a reliable relative position, the first anchoring structure 30 is fixed to the target soil layer 102. Due to the prestress of the pull rope 20, when the soil of the target soil layer 102 is loosened, the prestress will produce a large change.

[0049] Furthermore, the first anchoring structure 30 includes a resistance increasing structure that can be embedded into the target soil layer 102 along the radial direction of the borehole 40 , and the resistance increasing structure is configured to be embedded into the target soil layer 102 when the user operates the first anchoring structure 30 to rotate.

[0050] In a specific embodiment, in combination Figure 3-4As shown, the first anchoring structure 30 is constructed in a columnar shape, with a pointed cone at the bottom, a threaded hole is provided in the first anchoring structure 30, a threaded column 31 is provided in the threaded hole, and a flap 32 is provided at the lower part of the first anchoring structure 30, wherein the first end 321 of the flap 32 is on the moving path of the threaded column 31, and the second end 323 of the flap 32 can extend to the outside of the first anchoring structure 30, when the threaded column 31 moves from top to bottom, the first end 321 of the flap 32 is continuously squeezed, and the second end 323 of the flap 32 is tilted up through the support of the rotating shaft 322, and moves to the position shown in FIG. Figure 4 Position shown.

[0051] In this way, when the first anchoring structure 30 sinks to the bottom of the borehole 40, the flap 32 further pushes the first anchoring structure 30 downward to prestress the pull rope 20. At the same time, it also improves the bonding ability between the first anchoring structure 30 and the target soil layer 102. In the target soil layer 102, when the soil to which the first anchoring structure 30 is bonded is loosened, the stress of the pull rope 20 will change, which also indicates that a cavity has been formed under the soil to which the first anchoring structure 30 is bonded.

[0052] Specifically, the top of the threaded column 31 is provided with a hexagonal or triangular or straight groove for inserting a tool. When the first anchoring structure 30 sinks to the bottom of the drill hole 40, a rod-shaped tool is used, the front end of which is provided with a corresponding protrusion. After aligning the protrusion with the groove, the threaded column 31 is rotated to make the flap 32 move from Figure 3 The contracted state shown becomes Figure 4 Shown in expanded state.

[0053] In other embodiments, in combination Figure 7 As shown, the outer wall of the first anchoring structure 30 is provided with a spiral blade 31". Similarly, the center position of the upper end surface of the first anchoring structure 30 is provided with a hexagonal, triangular or straight groove for inserting a tool. When the first anchoring structure 30 sinks to the bottom of the borehole 40, a rod-shaped tool is used, the front end of which is provided with a corresponding protrusion. After aligning the protrusion with the groove, the first anchoring structure 30 is rotated to make the spiral blade 31" move downward and embed into the surrounding soil, wherein the outer contour of the spiral blade 31" is the same as the diameter of the borehole 40.

[0054] In the above embodiment, the pull rope 20 is fixed to the first anchoring structure 30 by crimping or welding (aramid wire is only crimped), and the first anchoring point 22 of the pull rope 20 shown in the figure is a welding point.

[0055] Further, combined with Figure 5-6 As shown, the second anchoring structure 10 includes a shell 11 and a prestressed adjustment component 12. The shell 11 is fixed to the road surface 100 through an anchor. A cavity 111 is provided in the shell 11. A channel for the pull rope 20 to pass into the cavity 111 is provided at the bottom of the shell 11.

[0056] The shell 11 is constructed in a cylindrical shape, with an outwardly extending edge on the upper part, and anchor holes on the edge that can be penetrated by anchor nails or bolts to fix the shell 11 to the road surface 100. A cavity 111 is provided on the inner side of the shell 11, and a through hole communicating with the cavity 111 is provided on the bottom.

[0057] Furthermore, the stress detection component 13 is fixedly connected to the prestress adjustment component 12, and the prestress adjustment component 12 is configured to be movable relative to the shell 11 along the axial direction of the borehole 40, so that the distance between the first end and the second end of the pull rope 20 changes, thereby changing the prestress of the pull rope 20.

[0058] Since the traffic on the road surface 100 and the surrounding construction will cause the road surface to vibrate, a small vibration will cause the stress change of the pull rope 20, but the range of the stress change is small. Therefore, the prestress applied to the pull rope 20 should be much larger than the stress change caused by these vibration factors. Only when the target soil layer 102 loosens, causing the stress of the pull rope 20 to drop significantly, it is determined that the target soil layer 102 is about to collapse.

[0059] Therefore, it is necessary to use the prestressing force adjusting component 12 to adjust the prestressing force of the pull rope 20 to a suitable range to avoid interference caused by environmental factors as much as possible.

[0060] Combination Figure 6 As shown, in a specific embodiment, the prestressed adjustment component 12 is constructed in a columnar shape, the outer wall of the prestressed adjustment component 12 is provided with a thread, the channel of the shell 11 is provided with a thread, the prestressed adjustment component 12 is threadedly connected to the shell 11, and a through hole is provided at the axis of the prestressed adjustment component 12, and the pull rope 20 is inserted into the cavity 111 through the through hole.

[0061] Preferably, the stress detection component 13 is arranged above the prestressed adjustment component 12, the second end of the pull rope 20 is connected to the support structure 14, the stress detection component 13 is constructed into a C shape and can be filled between the support structure 14 and the prestressed adjustment component 12, and the upper end face or the lower end face of the stress detection component 13 is set as the stress detection end.

[0062] The C-shaped stress detection component 13 may be inserted between the support structure 14 and the prestress adjustment component 12 from the side.

[0063] In this way, when the stress of the pull rope 20 changes, the top or bottom of the stress detection component 13 contacts the support structure 14 and the prestress adjustment component 12, and the stress change can be directly fed back through the force transmission between the rigid components.

[0064] Specifically, the support structure 14 is in a plate shape or a rod shape, and is shown in the figure as a rod shape. The pull rope 20 is fixed to the support structure 14 by welding, crimping or binding.

[0065] In order to avoid loosening of the threaded connection due to vibration, preferably, the outer wall of the prestressed adjustment component 12 is provided with a card slot, and the cavity 111 is provided with a positioning slot. When the card slot and the positioning slot are aligned, the positioning block 15 inserted into the card slot and the positioning slot fixes the prestressed adjustment component 12 and the shell 11.

[0066] In this way, the prestressed pressure adjusting component 12 and the housing 11 can be kept in a reliable relative position, and the stress of the pull rope 20 will change only when the target soil layer 102 at the bottom is loosened.

[0067] Among them, the above-mentioned stress detection component 13 also includes a communication module. Optionally, the communication module supports cellular data connection of low-power devices in the wide area network through narrowband Internet of Things communication. The communication module is used to transmit the collected stress data to the server.

[0068] Preferably, in order to reduce power consumption, a method of timed collection and periodic uploading is adopted. Optionally, the collection period is one day and the uploading period is one week. In this way, the power consumption of the device can be greatly reduced.

[0069] Furthermore, a sealing cover 16 is provided above the housing 11 for opening or closing the cavity 111 .

[0070] Optionally, corresponding sealing structures, such as sealing rings, are provided at the perforations of the sealing cover 16 and the prestressed pressure adjusting component 12 to prevent the electronic components in the cavity 111 from getting wet.

[0071]

Road collapse monitoring and early warning method

[0072] The second aspect of the present invention proposes a technical solution, a road collapse monitoring and early warning method, using the above-mentioned road collapse monitoring and early warning device, comprising the following steps:

[0073] Step 1, obtaining the ultimate tensile stress of the first anchoring structure 30 in the target soil layer 102;

[0074] Step 2: using a drilling tool to form a borehole 40 extending from the road surface layer 100 to the target soil layer 102;

[0075] Step 3: deploying a road collapse monitoring and early warning device, and adjusting the stress of the pull rope 20 to be less than the ultimate tensile stress tested in step 1;

[0076] Step 4: The stress of the pull rope 20 is collected by the stress detection component 13 , and the collected signal is regularly sent to the server, and whether the target soil layer 102 collapses is determined based on the stress change of the pull rope 20 .

[0077] In step 1, a pre-drilled hole is used, and the first anchoring structure 30 is installed at a suitable position. A dynamometer is used to detect the connection to the pull rope 20, and the pull rope 20 is pulled upward until a larger position is reached. The stress at this time is recorded as the ultimate tensile stress, and then the pre-drilled hole is buried and re-drilled to form a borehole 40.

[0078] The location of the borehole 40 is the location above the cavity detected by the ground penetrating radar, and the pre-drilled hole is located within one meter of the borehole 40 .

[0079] In a specific embodiment, after the drilling of step 2 is completed, the first anchoring structure 30 connected with the pull rope 20 is sunk to the bottom of the borehole 40, and a tool is used to combine the first anchoring structure 30 with the target soil layer 102, for example, a rod-shaped tool is used, the front end of which is provided with a corresponding protrusion, and after the protrusion is aligned with the groove, the threaded column 31 is rotated to make the flap 32 move from Figure 3 The contracted state shown becomes Figure 4 In the unfolded state shown, or using a rod-shaped tool, the front end is provided with a corresponding protrusion, after aligning the protrusion with the groove, the first anchoring structure 30 is rotated to make the spiral blade 31" move downward and embed into the surrounding soil, wherein the outer contour of the spiral blade 31" is the same as the diameter of the drill hole 40, so that the first anchoring structure 30 is combined with the target soil layer 102;

[0080] Combination Figure 6 As shown, the second end of the pull rope 20 is passed through the prestressed adjustment component 12 and cut at a suitable length, the pull rope 20 is connected to the support structure 14, and the prestressed adjustment component 12 is rotated with a tool to adjust it to the lowest position, and the stress detection component 13 is filled between the prestressed adjustment component 12 and the support structure 14. The stress detection component 13 should be placed in the placement groove 121 at the top of the prestressed adjustment component 12. After placing it, slowly rotate the prestressed adjustment component 12 to make it rise and gradually lift up the support structure 14 to tighten the pull rope 20 until it reaches 70%-80% of the ultimate tensile stress, and then cover the sealing cover 16.

[0081] Furthermore, the stress data uploaded by the stress detection component 13 is used to determine whether the cavity at the point develops to the target soil layer 102. Optionally, when the stress of the pull rope 20 is reduced to less than 30% of the initial stress, the soil layer is deemed to be loose.

[0082] In combination with the above embodiments, the present invention respectively sets two anchor points on the road surface and the target soil layer, and the two anchor points are connected by a prestressed rope. When a cavity develops under the target soil layer, the target soil layer loosens, and the tension of the prestressed rope is released. By monitoring the tension of the rope, it is possible to predict in advance that the target soil layer will collapse, and effectively warn of the development of the cavity. In addition, the present application causes little damage to the road and has a simple structure, and is suitable for targeted collapse warnings at cavity locations detected on the road.

[0083] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. An embedded wire-type road collapse monitoring and early warning device, characterized in that: include: A borehole (40) extending from the road surface layer (100) to the target soil layer (102); A first anchoring structure (30) is arranged at the bottom of the borehole (40) and anchored to the target soil layer (102); A second anchoring structure (10) is arranged on the top of the drill hole (40) and is anchored to the road surface layer (100); A pull rope (20), a first end of which is connected to the first anchoring structure (30); A stress detection component (13), wherein the stress detection component (13) has a stress detection end; The stress detection component (13) is fixed to the second anchoring structure (10), and the second end of the pull rope (20) is connected to the stress detection end of the stress detection component (13), the pull rope (20) is configured to have a pre-tension stress, and the stress detection component (13) is used to detect stress changes of the pull rope (20); The second anchoring structure (10) comprises a shell (11) and a prestressed pressure adjusting component (12); the shell (11) is fixed to the road surface layer (100) via an anchoring piece; a cavity (111) is provided in the shell (11); and a channel is provided at the bottom of the shell (11) for the pull rope (20) to pass through the cavity (111); The stress detection component (13) is fixedly connected to the prestress adjustment component (12), and the prestress adjustment component (12) is configured to be movable relative to the housing (11) along the axis of the borehole (40), so that the spacing between the first end and the second end of the pull rope (20) changes, thereby changing the prestress of the pull rope (20).

2. The buried wire-type road collapse monitoring and early warning device according to claim 1 is characterized in that: The prestress adjustment component (12) is constructed in a columnar shape, the outer wall of the prestress adjustment component (12) is provided with a thread, the channel of the shell (11) is provided with a thread, the prestress adjustment component (12) is threadedly connected to the shell (11), a through hole is provided at the axis of the prestress adjustment component (12), and the pull rope (20) is inserted into the cavity (111) through the through hole.

3. The buried wire type road collapse monitoring and early warning device according to claim 2 is characterized in that: The stress detection component (13) is arranged above the prestressed stress adjustment component (12); the second end of the pull rope (20) is connected to the support structure (14); the stress detection component (13) is constructed in a C shape and can be filled between the support structure (14) and the prestressed stress adjustment component (12); the upper end surface or the lower end surface of the stress detection component (13) is arranged as a stress detection end.

4. The buried wire-type road collapse monitoring and early warning device according to claim 2 is characterized in that: The outer wall of the prestressed pressure adjusting component (12) is provided with a clamping groove, and the cavity (111) is provided with a positioning groove, and when the clamping groove is matched with the positioning groove, a positioning block (15) inserted into the clamping groove and the positioning groove fixes the prestressed pressure adjusting component (12) and the housing (11).

5. The buried wire type road collapse monitoring and early warning device according to claim 1 is characterized in that: The first anchoring structure (30) comprises a resistance increasing structure capable of being embedded into the target soil layer (102) along the radial direction of the borehole (40), and the resistance increasing structure is configured such that when a user operates the first anchoring structure (30) to rotate, the resistance increasing structure is embedded into the target soil layer (102).

6. The buried wire-type road collapse monitoring and early warning device according to claim 1 is characterized in that: The pull rope (20) comprises a stainless steel rope or an aramid wire rope.

7. The buried wire-type road collapse monitoring and early warning device according to claim 1 is characterized in that: The structural layer between the road surface layer (100) and the target soil layer (102) is defined as a hard shell layer, and the thickness of the hard shell layer is 2-3 m.

8. A road collapse monitoring and early warning method, characterized in that: Using the road collapse monitoring and early warning device described in any one of claims 1 to 7 comprises the following steps: Step 1: obtaining the ultimate tensile stress of the first anchoring structure (30) in the target soil layer (102); Step 2: using a drilling tool to form a borehole (40) extending from the road surface layer (100) to the target soil layer (102); Step 3, laying out the first anchoring structure (30), the second anchoring structure (10) and the pull rope (20), and adjusting the stress of the pull rope (20) to be less than the ultimate tensile stress tested in step 1; Step 4: The stress of the pull rope (20) is collected by the stress detection component (13), and the collected signal is regularly sent to the server, and whether the target soil layer (102) has collapsed is determined based on the stress change of the pull rope (20).

9. The road collapse monitoring and early warning method according to claim 8, characterized in that: In step 3, the prestress of the pull rope (20) is changed by adjusting the distance between the prestress adjustment component (12) and the housing (11).

Images