Ground subsidence measuring device and method for investigation

Abstract

The invention relates to a ground subsidence measuring device and a ground subsidence measuring method for investigation, and belongs to the technical field of engineering surveying. Through cooperation of the sliding sleeve and the guide rod, stable sliding of the sliding sleeve can be guaranteed, the measurement position of the sliding sleeve can be conveniently adjusted, through cooperation of the sliding sleeve and the guide rod, it can be guaranteed that the sliding sleeve is always in a horizontal state, and the measurement precision can be improved. Through the action of the first spring, the connecting piece can be conveniently fixed to the hole wall; and through the cooperation of the control rope assembly, the connecting piece can be conveniently taken out from the hole wall. A locking device is further adopted, so that the position of the connecting piece can be effectively kept, and the operation is stable. The control rope is adopted for control, operation is easy, and efficient control can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ground subsidence monitoring, and in particular to a ground subsidence measuring device for surveying. Background Art

[0002] During hydrological or mineral exploration, it is necessary to measure the subsidence of the ground in the area.

[0003] The main means at present is to establish ground subsidence monitoring marks. Ground subsidence monitoring marks are usually composed of bedrock marks and layered marks. The bottom of the bedrock mark is fixed to the bedrock to form a reference mark; the bottom of the layered mark needs to be in close contact with the monitored soil layer and move flexibly up and down with the changes in the soil layer, so as to complete the reading and calculation of the ground subsidence.

[0004] Existing ground subsidence measurements are mostly conducted on the ground surface, with fewer measurements of subsidence inside the strata. In addition, existing measurements inside the strata are either too complex in structure, too costly, or not accurate enough, and therefore cannot meet current survey and measurement needs.

[0005] Based on the above situation, we propose a ground subsidence measuring device for investigation. Summary of the invention

[0006] The present invention is proposed to alleviate or solve at least one aspect or at least one point of the above problems.

[0007] The present invention provides a ground settlement measuring device for survey, which comprises a fixing ring, a guide rod, a control rope assembly and a sleeve assembly; wherein: The sleeve assembly includes a sliding sleeve, a first connecting sleeve, a second connecting sleeve, a third connecting sleeve, a first spring, a first connecting rod, a second connecting rod, a connecting sheet, an insert sheet, and a locking device; the control rope assembly includes a first rope, a second rope, a third rope, and a fourth rope; The fixing ring and the guide rod are detachably fixedly connected by a fixing pin; the sliding sleeve is slidably mounted on the guide rod; The sliding sleeve is fixedly connected to the first connecting tube at its first axial position, and is fixedly connected to the second connecting tube at its second axial position, and the second connecting tube is fixedly connected to the third connecting tube; the first connecting rod and the second connecting rod are fixed to the connecting plate; the first connecting rod can be relatively slidably fixed inside the first connecting tube, and the second connecting rod can be relatively slidably fixed inside the third connecting tube; a first spring is arranged inside the first connecting tube, one end of the first spring is fixed to the first connecting tube, and the other end is fixedly connected to the first connecting rod; The locking device includes a locking block, a locking plate, a second spring, a support plate, a matching block, a limiting rod, and a limiting plate; the second spring is used to apply elastic force to the locking plate, and the locking plate can slide along the support plate; the limiting rod and the limiting plate are used to limit the position of the locking block; A first locking groove is formed on the third connecting cylinder, and a second locking groove is formed on the second connecting rod, and the locking block can pass through the first locking groove and the second locking groove at the same time; A first matching groove is also provided on the side of the locking block, and a matching block is also fixedly provided on the third connecting cylinder, and a second matching groove is provided on the side of the matching block; The locking plate can be changed between a first position and a second position. In the first position, one end of the locking plate is inserted into the first matching groove to prevent the locking plate from falling out of the first locking groove and the second locking groove. In the second position, the locking plate is inserted into the second matching groove to prevent the locking plate from falling into the first locking groove. The first rope is used to pull the locking block, the second rope is used to pull the locking plate, the third rope is used to pull the second connecting tube, and the fourth rope is used to pull the second connecting rod.

[0008] Preferably, a first hole, a second hole, a second hole, a third hole and a fourth hole are formed on the fixing ring; one end of the first rope is fixedly connected to the locking block, and the other end passes through the first hole on the fixing ring; one end of the second rope is fixedly connected to the locking plate, and the other end passes around the first guide wheel and passes through the second hole on the fixing ring; one end of the third rope is fixedly connected to the second connecting tube, and the other end passes through the third hole on the fixing ring; one end of the fourth rope is fixedly connected to the second connecting rod, and the other end passes around the first guide wheel and passes through the fourth hole on the fixing ring.

[0009] Preferably, a first connecting plate is further formed on the fixing ring, a sliding groove is formed on the first connecting plate, a sliding block is arranged on the sliding groove, and a fifth pull ring is arranged on the sliding block.

[0010] Preferably, there are two groups of matching blocks, which are arranged on both sides of the locking block. The width of the locking plate is greater than the width of the locking block. The cross-sections of the first matching groove and the second matching groove are triangular, and one end of the locking plate has a triangular cross-section.

[0011] Preferably, the limiting rod is arranged above the matching block, and the limiting plate is arranged above the limiting rod.

[0012] Preferably, the guide rod is provided with a guide groove, and the sliding sleeve is provided with a guide column matched with the guide groove; wherein the number of the guide groove and the number of the guide column are both two.

[0013] Preferably, the connecting piece is an arc-shaped piece, so as to ensure that it can be attached to the inner surface of the hole in the ground, and a plurality of groups of plug-ins are connected to the connecting piece.

[0014] Preferably, when the first spring is in a maximum compression state, the first locking groove on the third connecting cylinder and the second locking groove on the second connecting rod are in a center-aligned state.

[0015] Preferably, there are two groups of first connecting tubes, which are symmetrically arranged relative to the sliding sleeve.

[0016] Preferably, the inner ring and the outer ring are concentrically arranged.

[0017] The method for measuring ground subsidence for investigation using the device according to any one of claims 1 to 9 is characterized in that it comprises the following steps: Step 1: Drill holes in the ground to obtain information on geological stratification; Step 2: Place the device in the hole, fix the fixing ring 100 so that it is not affected by the settlement, and optionally, fix the fixing ring 100 to the bedrock that is not affected by the settlement; Step 3: Adjust the length of the third rope 403 to make the sleeve assembly 300 slide down along the guide rod 200 to the detection position; Step 4: Pull the first rope 401 to raise the locking block 326 and release the lock between the third connecting tube 308 and the second connecting rod; or first pull the second rope 402 to pull one end of the locking plate 319 out of the first matching groove, and then pull the first rope 401; after the locking block 326 rises to the position defined by the limiting plate 325, at this time, the locking plate 319 is inserted into the second matching groove under the action of the second spring 321; Under the action of the elastic force of the first spring 310, the first spring 310 pushes the pressing plate 311, driving the first connecting rod and the connecting piece 303 to expand outward, so that the inserting piece 304 is inserted into the inner wall of the hole; thereby fixing it on the inner wall, during which the second connecting rod slides inside the third connecting tube 308, thereby driving the fourth rope 404 to move downward; Step 5: Mark the initial position of the third rope 403, tie the third rope 403 to the slider 112 through the fifth pull ring 111, move the slider 112 to make the third rope 403 in a tensioned state, and mark the position of the slider 112 at this time; or adopt other existing methods to record the descending height of the third rope 403, such as directly fixing one end of the third rope 403 to an elastic member, marking the third rope 403, so as to obtain its descending distance, etc.; When sinking occurs, the slider 112 will slide toward the third rope 403, and the precise sinking distance can be obtained by recording the position of the slider 112; Step 6: Pull the device upward, or adjust the length of the third rope 403 to measure the ground settlement information at another depth.

[0018] The ground settlement measuring device of the present invention can ensure that the sliding sleeve slides down very stably through the cooperation between the sliding sleeve and the guide rod, making it convenient to adjust its measuring position. Moreover, through the cooperation between the sliding sleeve and the guide rod, it can ensure that the sliding sleeve is always in a horizontal state, which is beneficial to improving the measurement accuracy.

[0019] The present invention can conveniently fix the connecting piece on the hole wall through the action of the first spring; and can conveniently take the connecting piece out from the hole wall through the cooperation of the first rope.

[0020] The present invention further adopts a locking device, which can effectively maintain the position of the connecting piece, making its operation stable. The present invention adopts a pull rope for control, which is simple to operate and can achieve efficient control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of a ground subsidence measuring device for surveying according to an exemplary embodiment of the present invention.

[0022] Figure 2 for Figure 1 An enlarged schematic diagram of the upper part of .

[0023] Figure 3 It is a front schematic diagram of a ground subsidence measuring device for surveying according to an exemplary embodiment of the present invention.

[0024] Figure 4 for Figure 3 An enlarged schematic diagram of the upper part of .

[0025] Figure 5 for Figure 3 An enlarged schematic diagram of the middle half of .

[0026] Figure 6 It is a semi-sectioned perspective schematic diagram of a ground subsidence measuring device for surveying according to an exemplary embodiment of the present invention.

[0027] Figure 7 for Figure 6 An enlarged schematic diagram of the middle half of .

[0028] Figure 8 for Figure 6 Middle I is an enlarged schematic diagram (wherein the locking plate is located in the first position).

[0029] Fig. 9 It is a perspective schematic diagram of a sleeve assembly of a ground subsidence measuring device for surveying according to an exemplary embodiment of the present invention (wherein the locking plate is located at a first position).

[0030] Fig.10 for Fig. 9 Enlarged schematic diagram of point II in the middle.

[0031] Fig.11 It is a perspective schematic diagram of a sleeve assembly of a ground subsidence measuring device for surveying according to an exemplary embodiment of the present invention (wherein the locking plate is located at the second position).

[0032] Fig.12 for Fig.11An enlarged schematic diagram of point III in FIG.

[0033] Wherein: 100-fixing ring, 101-first hole, 102-second hole, 103-third hole, 104-fourth hole, 105-inner ring, 106-outer ring, 107-first connecting plate, 108-fixing pin, 109-second connecting plate, 110-sliding groove, 111-fifth pull ring, 112-sliding block; 200-guide rod, 201-rod portion, 202-guide groove; 300-sleeve assembly, 301-sliding sleeve, 302-guide column, 303-connecting plate, 304-inserting plate, 305-first connecting cylinder, 306-first connecting rod, 307-second connecting cylinder, 308-third connecting cylinder, 309-second connecting rod, 310-first spring, 311-pressure plate; 312-first pull ring, 313-second pull ring, 314-third pull ring, 315-fourth pull ring, 316-first locking groove, 317-first guide wheel, 318-second guide wheel, 319-locking plate, 320-support plate, 321-second spring, 322-matching block, 323-second matching groove, 324-limiting rod, 325-limiting plate, 326-locking block, 327-first matching groove, 328-second locking groove.

[0034] 400 - control rope assembly, 401 - first rope, 402 - second rope, 403 - third rope, 404 - fourth rope. DETAILED DESCRIPTION

[0035] The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention, and should not be construed as a limitation of the present invention. In the present invention, the same reference numerals represent the same or similar components.

[0036] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will be clear after understanding the disclosure of the present invention.

[0037] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion.

[0038] In the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, or “coupled to” another element, the element may be directly “on”, “connected to”, or “coupled to” another element, or one or more other elements may be present therebetween. Conversely, when an element is described as being “directly on”, “directly connected to”, or “directly coupled to” another element, there may be no other elements present therebetween.

[0039] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise", "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0040] In order to enable those skilled in the art to use the contents of the present invention, the following exemplary embodiments may be provided in combination with specific application scenarios, specific systems, parameters of devices and components, and specific connection methods. However, for those skilled in the art, these embodiments are only examples, and the general principles defined herein may be applied to other embodiments and application scenarios without departing from the spirit and scope of the present invention.

[0041] According to an exemplary embodiment of the present invention: Figure 1-12 As shown, a ground settlement measuring device for surveying includes a fixing ring 100, a guide rod 200, a control rope assembly 400 and a sleeve assembly 300; the control rope assembly 400 is also called a pull rope assembly.

[0042] like Figure 1 As shown in FIG. 2 , the fixing ring 100 includes an inner ring 105 and an outer ring 106, and the inner ring 105 and the outer ring 106 are connected together by a second connecting plate 109; the fixing ring 100 also includes a first connecting plate 107; a first hole 101, a second hole 102, a third hole 103 and a fourth hole 104 are formed on the first connecting plate 107; a slide groove 110 is formed on the first connecting plate 107, a slider 112 is arranged inside the slide groove 110, and a fifth pull ring 111 is formed on the slider 112.

[0043] The settlement can be recorded by the slider 112. Optionally, a friction force is formed between the slider 112 and the chute 110 to prevent the slider 112 from being pulled to move due to the weight of the rope when the slider 112 is connected to the rope. Alternatively, an elastic member can be connected behind the slider 112 to overcome the gravity of the rope connected thereto.

[0044] The fixing pin 108 passes through the connecting holes on the inner ring 105 and the guide rod 200 to detachably fix the two together; Figure 2 As shown, the cross section of the fixing pin 108 is square and the whole is in a conical structure, so that detachable fixing can be easily achieved, and the weight of the fixing pin 108 can be set to multiple.

[0045] like Figure 1-12 As shown, the sleeve assembly 300 includes a sleeve 301, a first connecting tube 305, a second connecting tube 307, a third connecting tube 308, a first spring 310, a second spring 321, a connecting piece 303, an inserting piece 304, and a locking device; the sleeve 301 is slidably mounted on the guide rod 200; optionally, the guide rod 200 is provided with a guide groove 202, and the sleeve 301 is provided with a guide column 302 that cooperates with the guide groove 202. The number of the guide groove 202 and the number of the guide column 302 are both two, and through the above cooperation, the sleeve 301 can slide stably along the guide column 302.

[0046] The sliding sleeve 301 is roughly cylindrical, and a first connecting tube 305 is fixedly connected to the first axial position thereof, and a second connecting tube 307 is fixedly connected to the second axial position thereof, and the second connecting tube 307 is fixedly connected to the third connecting tube 308; wherein, the first connecting tube 305 is cylindrical, the third connecting tube 308 is cylindrical, and the second connecting tube 307 is square. A first connecting rod 306 and a second connecting rod 309 are fixed to the connecting piece 303; the first connecting rod 306 can be relatively slidably fixed inside the first connecting tube 305, and the second connecting rod 309 can be relatively slidably fixed inside the third connecting tube 308. The connecting piece 303 is an arc-shaped piece, so as to ensure that it can be attached to the inner surface of the hole on the ground. A plurality of groups of plug-ins 304 are also connected to the connecting piece 303, and the connecting piece 303 can be fixed to the hole through the plurality of groups of plug-ins 304. The multiple groups of inserts 304 are also arc-shaped pieces, which are arranged in parallel. Through the above arrangement, on the one hand, the connecting piece 303 can be firmly fixed on the hole, and on the other hand, when the ground settles, the settlement force of the ground can be stably transmitted.

[0047] A first spring 310 is provided inside the first connecting cylinder 305, one end of the first spring 310 is fixed to the first connecting cylinder 305, and the other end is fixedly connected to the first connecting rod 306; wherein the first connecting rod 306 is connected to a pressing plate 311, and the other end of the first spring 310 is fixed to the pressing plate 311. The first spring 310 can apply elastic force to the connecting piece 303, thereby fixing the connecting piece 303 on the inner wall of the hole.

[0048] like Figure 6-12As shown, the locking device includes a locking block 326, a locking plate 319, a second spring 321, a support plate 320, a matching block 322, a limiting rod 324, and a limiting plate 325; the second spring 321 is used to apply elastic force to the locking plate 319, one end of the second spring 321 is fixedly connected to the locking plate 319, and the other end can be fixedly connected to the second connecting cylinder 307. The locking plate 319 can slide along the support plate 320; the matching block 322, the limiting rod 324 and the limiting plate 325 are used to limit the position of the locking block 326; the matching block 322, the limiting rod 324 and the limiting plate 325 are located on both sides of the locking block 326. Optionally, the inner side surfaces of the matching block 322 and the limiting rod 324 can be in sliding contact with the locking block 326, thereby limiting its sliding position.

[0049] A first locking groove 316 is formed on the third connecting cylinder 308, and a second locking groove 328 is formed on the second connecting rod 309. The locking block 326 can pass through the first locking groove 316 and the second locking groove 328 at the same time; the cross section of the locking block 326 can be smaller than the cross section of the first locking groove 316 and the second locking groove 328, so that the locking block 326 can be conveniently placed in the first locking groove 316 and the second locking groove 328. Optionally, when the first spring 310 is in the maximum compression state, the first locking groove 316 and the second locking groove 328 are in a center-aligned state.

[0050] like Figure 6-12 As shown, a first matching groove is also provided on the side of the locking block 326, and a matching block 322 is also fixedly provided on the third connecting cylinder 308, and a second matching groove is provided on the side of the matching block 322; the locking plate 319 can be changed between a first position and a second position. In the first position, one end of the locking plate 319 is inserted into the first matching groove to prevent the locking plate 319 from falling off from the first locking groove 316 and the second locking groove 328; in the second position, the locking plate 319 is inserted into the second matching groove to prevent the locking plate 319 from falling into the first locking groove 316. The cross-sections of the first matching groove and the second matching groove are triangular, and one end of the locking plate 319 is also formed into a triangular cross-section. The width of the locking plate 319 is greater than the width of the locking block 326, so that both sides of one end of the locking plate 319 can be matched with the second matching groove.

[0051] like Figure 1-12 As shown, the control rope assembly 400400 includes a first rope 401, a second rope 402, a third rope 403 and a fourth rope 404; a first hole 101, a second hole 102, a third hole 103 and a fourth hole 104 are formed on the fixing ring 100.

[0052] One end of the first rope 401 is fixedly connected to the locking block 326, and the other end passes through the first hole 101 on the fixing ring 100; one end of the second rope 402 is fixedly connected to the locking plate 319, and the other end passes through the second hole 102 on the fixing ring 100 after passing through the first guide wheel 317; one end of the third rope 403 is fixedly connected to the second connecting cylinder 307, and the other end passes through the third hole 103 on the fixing ring 100; one end of the fourth rope 404 is fixedly connected to the second connecting rod 309, and the other end passes through the second guide wheel 318 and passes through the fourth hole 104 on the fixing ring 100. The first guide wheel 317 and the second guide wheel 318 are both fixedly arranged inside the second connecting cylinder 307; the second connecting cylinder 307 is provided with holes for the second rope 402 and the fourth rope 404 to pass through.

[0053] A first pull ring 312 is connected to the upper part of the locking block 326, and the first pull ring 312 is used to connect to the first rope 401; a second pull ring 313 is connected to one end of the locking plate 319, and the second pull ring 313 is used to connect to the second rope 402; a third pull ring 314 connected to the third rope 403 is provided at the upper part of the second connecting tube 307; a fourth pull ring 315 connected to the fourth rope 404 is provided at one end of the second connecting rod 309.

[0054] Below, combined with the attached Figure 1-12 The working process of the present invention is described: Drill holes in the ground to obtain information about geological stratification; The device is placed in a hole, and the fixing ring 100 is fixed so that it is not affected by the settlement. Optionally, the fixing ring 100 is fixed together with a bedrock that is not affected by the settlement.

[0055] Adjust the length of the third rope 403 so that the sleeve assembly 300 slides down along the guide rod 200 to the detection position; Pull the first rope 401 to make the locking block 326 rise and release the lock between the third connecting tube 308 and the second connecting rod; or pull the second rope 402 first to pull one end of the locking plate 319 out of the first matching groove, and then pull the first rope 401; after the locking block 326 rises to the position limited by the limit plate 325, at this time, under the action of the second spring 321, the locking plate 319 causes one end of the locking plate 319 to be inserted into the second matching groove.

[0056] Under the action of the elastic force of the first spring 310, the first spring 310 pushes the pressing plate 311, driving the first connecting rod and the connecting piece 303 to expand outward, so that the inserting piece 304 is inserted into the inner wall of the hole; thereby fixing it on the inner wall, during which the second connecting rod slides inside the third connecting tube 308, thereby driving the fourth rope 404 to move downward; The initial position of the third rope 403 is marked, the third rope 403 is tied to the slider 112 through the fifth pull ring 111, the slider 112 is moved to put the third rope 403 in a tensioned state, and the position of the slider 112 at this time is marked; of course, other existing methods of recording the descending height of the third rope 403 can also be used, such as fixing one end of the third rope 403 directly on an elastic member, marking the third rope 403, so as to obtain its descending distance, etc., which are all within the protection scope of the present invention.

[0057] When sinking occurs, the slider 112 will slide toward the third rope 403, and the precise sinking distance can be obtained by recording the position of the slider 112.

[0058] When it is necessary to pull out the sleeve assembly 300, pull the third rope 403, and the third rope 403 pulls the second connecting rod, thereby driving the connecting piece 303 to move radially inward and compressing the first spring 310; when it cannot be pulled further, the first locking groove 316 and the second locking groove 328 are aligned, and the second rope 402 is pulled at this time, so that the locking plate 319 no longer blocks the locking block 326, and the locking block 326 falls completely into the first locking groove 316 and the second locking groove 328, and the second rope 402 is released to insert one end of the locking plate 319 into the first matching groove to complete the locking of the locking block 326.

[0059] The device is pulled upward, or the length of the third rope 403 is adjusted to measure the ground settlement information at another depth.

[0060] The ground settlement measuring device of the present invention can ensure that the sliding sleeve 301 slides down very stably through the cooperation between the sliding sleeve 301 and the guide rod 200, and its measuring position can be adjusted conveniently. Moreover, through the cooperation between the sliding sleeve 301 and the guide rod 200, it can ensure that the sliding sleeve 301 is always in a horizontal state, which is beneficial to improving the measurement accuracy.

[0061] The present invention can conveniently fix the connecting piece 303 on the cave wall through the action of the first spring 310 ; and can conveniently remove the connecting piece 303 from the cave wall through the cooperation of the first rope 401 .

[0062] The present invention further adopts a locking device, which can effectively maintain the position of the connecting piece 303 and make its operation stable.

[0063] The present invention adopts a pull rope for control, which is easy to operate and can achieve efficient control.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments and combinations of elements may be made without departing from the principles and spirit of the invention, the scope of the invention being defined by the appended claims and their equivalents.

Claims

1. A ground settlement measuring device for survey, characterized in that: It includes a fixing ring, a guide rod, a control rope assembly and a sleeve assembly; wherein: The sleeve assembly includes a sliding sleeve, a first connecting sleeve, a second connecting sleeve, a third connecting sleeve, a first spring, a first connecting rod, a second connecting rod, a connecting sheet, an insert sheet, and a locking device; the control rope assembly includes a first rope, a second rope, a third rope, and a fourth rope; The fixing ring and the guide rod are detachably fixedly connected by a fixing pin; the sliding sleeve is slidably mounted on the guide rod; The sliding sleeve is fixedly connected to the first connecting tube at its first axial position, and is fixedly connected to the second connecting tube at its second axial position, and the second connecting tube is fixedly connected to the third connecting tube; the first connecting rod and the second connecting rod are fixed to the connecting plate; the first connecting rod can be relatively slidably fixed inside the first connecting tube, and the second connecting rod can be relatively slidably fixed inside the third connecting tube; a first spring is arranged inside the first connecting tube, one end of the first spring is fixed to the first connecting tube, and the other end is fixedly connected to the first connecting rod; The locking device includes a locking block, a locking plate, a second spring, a support plate, a matching block, a limiting rod, and a limiting plate; the second spring is used to apply elastic force to the locking plate, and the locking plate can slide along the support plate; the limiting rod and the limiting plate are used to limit the position of the locking block; A first locking groove is formed on the third connecting cylinder, and a second locking groove is formed on the second connecting rod, and the locking block can pass through the first locking groove and the second locking groove at the same time; A first matching groove is also provided on the side of the locking block, and a matching block is also fixedly provided on the third connecting cylinder, and a second matching groove is provided on the side of the matching block; The locking plate can be changed between a first position and a second position. In the first position, one end of the locking plate is inserted into the first matching groove to prevent the locking plate from falling out of the first locking groove and the second locking groove. In the second position, the locking plate is inserted into the second matching groove to prevent the locking plate from falling into the first locking groove. The first rope is used to pull the locking block, the second rope is used to pull the locking plate, the third rope is used to pull the second connecting tube, and the fourth rope is used to pull the second connecting rod.

2. The device according to claim 1, characterized in that: A first hole, a second hole, a second hole, a third hole and a fourth hole are formed on the fixing ring; one end of the first rope is fixedly connected to the locking block, and the other end passes through the first hole on the fixing ring; one end of the second rope is fixedly connected to the locking plate, and the other end passes around the first guide wheel and passes through the second hole on the fixing ring; one end of the third rope is fixedly connected to the second connecting tube, and the other end passes through the third hole on the fixing ring; one end of the fourth rope is fixedly connected to the second connecting rod, and the other end passes around the first guide wheel and passes through the fourth hole on the fixing ring.

3. The device according to claim 1, characterized in that: A first connecting plate is also formed on the fixing ring, a sliding groove is formed on the first connecting plate, a sliding block is arranged on the sliding groove, and a fifth pulling ring is arranged on the sliding block.

4. The device according to claim 1, characterized in that: There are two groups of matching blocks, which are arranged on both sides of the locking block. The width of the locking plate is greater than the width of the locking block. The cross-sections of the first matching groove and the second matching groove are triangular, and one end of the locking plate has a triangular cross-section.

5. The device according to claim 1, characterized in that: The limiting rod is arranged above the matching block, and the limiting plate is arranged above the limiting rod.

6. The device according to claim 1, characterized in that: The guide rod is provided with a guide groove, and the sliding sleeve is provided with a guide column matched with the guide groove; wherein the number of the guide groove and the number of the guide column are both two.

7. The device according to claim 1, characterized in that: The connecting piece is an arc-shaped piece, so as to ensure that it can be attached to the inner surface of the hole in the ground, and a plurality of groups of plug-ins are connected to the connecting piece.

8. The device according to claim 1, characterized in that: When the first spring is in the maximum compression state, the first locking groove on the third connecting cylinder and the second locking groove on the second connecting rod are in a center-aligned state.

9. The device according to claim 1, characterized in that: There are two groups of first connecting tubes, which are symmetrically arranged relative to the sliding sleeve.

10. A method for measuring ground subsidence for investigation using the device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1): Drill holes in the ground to obtain information on geological stratification; Step 2): Place the device in the hole, fix the fixing ring (100) so that it is not affected by the settlement, and optionally fix the fixing ring (100) to the bedrock that is not affected by the settlement; Step 3): Adjust the length of the third rope (403) so that the sleeve assembly (300) slides down along the guide rod (200) to the detection position; Step 4): Pull the first rope (401) to make the locking block (326) rise, and release the lock between the third connecting tube (308) and the second connecting rod; or first pull the second rope (402) to make one end of the locking plate (319) pull out from the first matching groove, and then pull the first rope (401); after the locking block (326) rises to the position limited by the limit plate (325), at this time, the locking plate (319) is inserted into the second matching groove under the action of the second spring (321); Under the action of the elastic force of the first spring (310), the first spring (310) pushes the pressure plate (311), driving the first connecting rod and the connecting sheet (303) to expand outward, thereby inserting the inserting sheet (304) into the inner wall of the hole; thereby fixing it on the inner wall, during which the second connecting rod slides inside the third connecting tube (308), thereby driving the fourth rope (404) to move downward; Step 5): Mark the initial position of the third rope (403), tie the third rope (403) to the slider (112) through the fifth pull ring (111), move the slider (112) to put the third rope (403) in a tensioned state, and mark the position of the slider (112) at this time; or adopt other existing methods of recording the descending height of the third rope (403), such as directly fixing one end of the third rope (403) on an elastic member, marking the third rope (403), so as to obtain its descending distance, etc.; When sinking occurs, the slider (112) will slide towards the third rope (403), and the precise sinking distance can be obtained by recording the position of the slider (112); Step 6): Pull the device upwards, or adjust the length of the third rope (403) to measure the ground settlement information at another depth.

Images