Foundation pit displacement measuring device

Abstract

When the foundation pit displacement measuring device is used, the base is fixed to the bottom of a foundation pit through the ground nails, the moving piece is fixed to the bottom of the foundation pit through the fixing assembly, and after the foundation pit displaces, the moving length of the moving piece on the graduated scale can be measured according to the length scales on the graduated scale; the rotating angle of the moving part and the rotating part around the base can be measured according to the cooperation of the pointer and the angle scales, so that the initial position and the position after displacement of the moving part are determined, the initial position of the moving part serves as the original point, the position after displacement of the moving part serves as the terminal point, and the distance from the original point to the terminal point is the linear size of foundation pit displacement. The direction from the original point to the terminal point is the linear displacement direction of the foundation pit; the displacement direction of the foundation pit can be more accurately obtained through the arrangement of a plurality of graduated scales on the rotating piece, and the displacement size of the foundation pit can be more accurately obtained through the arrangement of a plurality of moving pieces on one graduated scale; in general, by using the foundation pit displacement measuring device, the direction and the size of the displacement of the foundation pit can be measured more accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit measurement, in particular to a foundation pit displacement measuring device. Background Art

[0002] Foundation pit monitoring is an important part of foundation pit construction. It refers to various observations and analyses of changes in foundation pit rock and soil properties, support structure displacement and surrounding environmental conditions during foundation pit excavation and underground engineering construction. The monitoring results are fed back in a timely manner to predict the deformation and stable state development that will result from further construction. The degree of impact of the construction on the surrounding environment is determined based on the prediction to guide the design and construction, thus realizing the so-called information-based construction.

[0003] The displacement of the foundation pit is affected by many factors, so the staff cannot determine the direction of the foundation pit displacement in advance. The existing foundation pit displacement measuring devices are often fixed directly on the ground and cannot measure the direction of the foundation pit displacement. When the fixing direction of the displacement measuring device is inconsistent with the foundation pit displacement direction, the size of the foundation pit displacement cannot be accurately obtained, which affects the final measurement result. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems, the utility model provides a foundation pit displacement measuring device, which can more accurately measure the direction and size of the foundation pit displacement.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A foundation pit displacement measuring device, comprising:

[0009] A base, which can be fixed to the bottom of the foundation pit in cooperation with ground nails, and an angle scale is provided on the base;

[0010] A rotating member, the rotating member is rotatably connected to the base, the rotating member can rotate around the base in a horizontal plane, and the rotating member is provided with a plurality of pointers corresponding to the angle scales;

[0011] A plurality of scales, each of which is detachably connected to the rotating member, and each of which is horizontally arranged;

[0012] A plurality of groups of moving parts, the number of the groups of moving parts is consistent with the number of the scales, each scale is slidably connected with a group of the moving parts, and each group of the moving parts is composed of a plurality of the moving parts;

[0013] A plurality of fixed components, the number of the fixed components is the same as the number of the moving parts, each of the moving parts is provided with a fixed component, and the fixed components can be fixed at the bottom of the foundation pit, so as to fix the relative position of the moving parts and the scale.

[0014] Preferably, the rotating member is annular, and a plurality of the scales are arranged in an annular array around the rotating member.

[0015] Preferably, the fixing assembly comprises:

[0016] Two extension plates, which are respectively arranged on opposite sides of the moving member in the horizontal direction, and each of the extension plates is provided with a vertical guide hole;

[0017] A frame body, the frame body is in a rectangular ring shape, and the frame body has two vertical parts and is slidably connected in the two guide holes respectively;

[0018] A ground inserting piece is located at the bottom of the frame and is vertically arranged. The ground inserting piece is in the shape of a nail and can be inserted into the ground, so as to fix the relative positions of the frame, the extension plate, the moving piece and the scale.

[0019] Preferably, it further comprises a supporting assembly, which is detachably connected to an end of the scale away from the base so that the scale is in a horizontal state, and the supporting assembly comprises:

[0020] A fixing block, the fixing block is detachably connected to an end of the scale away from the base, and a vertical threaded hole is provided on the fixing block;

[0021] an adjusting screw, the adjusting screw being engaged in the threaded hole;

[0022] A support member is located at the bottom of the adjusting screw and is used for contacting the ground and increasing the ground contact area.

[0023] Preferably, the top of the support member is rotatably connected to the bottom of the adjusting screw to reduce the resistance encountered by the adjusting screw when rotating.

[0024] Preferably, the scale and the base, and the scale and the support assembly are detachably connected via a connecting structure, and a plurality of the first jacks are provided at both ends of the scale, and the connecting structure comprises:

[0025] A plurality of connecting members, the base is provided with a plurality of the connecting members, the fixing block is provided with at least one of the connecting members, each of the connecting members is provided with a slot arranged horizontally and a plurality of second plug holes arranged vertically, the slot is arranged corresponding to the scale so that the end of the scale can be inserted into the slot, and the plurality of second plug holes are arranged corresponding to the plurality of first plug holes respectively;

[0026] A plurality of pins, the number of the pins and the first sockets is the same, each of the pins can pass through one of the first sockets and one of the second sockets, the diameters of the first sockets, the second sockets and the pins are the same, so that after the pins are inserted into the first sockets and the second sockets, the relative positions of the connector and the scale can be fixed.

[0027] Preferably, it also includes a lifting component, which is installed on the base and used to lift up the ground nails. The base is provided with a plurality of vertically arranged first positioning holes, which can cooperate with the ground nails to fix the base at the bottom of the foundation pit. The lifting component includes:

[0028] A hydraulic cylinder, which is mounted on the base and arranged vertically;

[0029] A hydraulic rod, which is drivingly connected to the bottom of the hydraulic cylinder and is vertically arranged;

[0030] A base plate, the top of which is connected to the hydraulic rod, and the bottom of which is against the ground for support. A plurality of second positioning holes are provided on the base plate, and the plurality of second positioning holes respectively correspond to the plurality of first positioning holes. The diameter of the second positioning holes is greater than or equal to the diameter of the first positioning holes, so that the ground nails can pass through the second positioning holes and enter the ground.

[0031] Preferably, the base and the scale are both provided with fluorescent coatings, which are used to highlight the angle scale and the length scale on the scale respectively.

[0032] (III) Beneficial effects

[0033] Compared with the prior art, the beneficial effects of the utility model are:

[0034] In actual use, multiple scales are installed on the rotating part, multiple moving parts on each scale are moved to the specified position, and then the base is fixed to the bottom of the foundation pit by ground nails, and the moving part is fixed to the bottom of the foundation pit by the fixing assembly. At this time, the installation of the foundation pit displacement measuring device is completed. After the foundation pit is displaced, the moving part and the scale will move relative to each other, and the length of the moving part on the scale can be measured according to the length scale on the scale. The rotating part and the base will rotate relative to each other, and the angle of the moving part rotating around the base can be measured according to the cooperation of the pointer and the angle scale, so as to determine the initial position of the moving part and the displacement. The position of the moving part is taken as the origin, and the position of the moving part after displacement is taken as the end point. The distance from the origin to the end point is the linear dimension of the foundation pit displacement, and the direction from the origin to the end point is the linear direction of the foundation pit displacement. Since the direction of the foundation pit displacement is not necessarily a linear direction, the setting of multiple scales on the rotating part can more accurately obtain the direction of the foundation pit displacement. Since a single measurement result often has a large error, the setting of multiple moving parts on a scale can more accurately obtain the size of the foundation pit displacement. In general, by using the foundation pit displacement measuring device, the direction and size of the foundation pit displacement can be measured more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0036] Figure 1 A three-dimensional diagram showing the foundation pit displacement measuring device of the utility model before being inserted into the ground at the bottom of the foundation pit;

[0037] Figure 2 Shows Figure 1 A three-dimensional view of the displacement measurement device of the middle foundation pit from another angle;

[0038] Figure 3 A three-dimensional diagram showing the foundation pit displacement measuring device of the utility model after being inserted into the ground at the bottom of the foundation pit;

[0039] Figure 4 Shows Figure 3 A three-dimensional view of the displacement measurement device of the middle foundation pit from another angle;

[0040] Figure 5 Shows Figure 1 A perspective view of the mid-base, angle scale, and lift assembly;

[0041] Figure 6 Shows Figure 1 A three-dimensional diagram of the rotating part, the pointer and a partial three-dimensional diagram of the connecting structure;

[0042] Figure 7 Shows Figure 1 Stereogram of the medium scale;

[0043] Figure 8 Shows Figure 1 A perspective view of the middle moving member, the extension plate and the guide hole;

[0044] Fig. 9 Shows Figure 1 A three-dimensional view of the middle frame and the vertical part;

[0045] Fig.10 Shows Figure 1 A three-dimensional view of the support assembly and a partial three-dimensional view of the connection structure.

[0046] In the figure: 1. base; 2. rotating part; 3. scale; 31. first plug hole; 4. moving part; 5. fixed assembly; 51. extension plate; 511. guide hole; 52. frame; 521. vertical part; 53. ground plug; 6. ground nail; 7. angle scale; 8. pointer; 9. support assembly; 91. fixed block; 911. threaded hole; 92. adjusting screw; 93. support member; 10. connecting structure; 101. connecting member; 1011. slot; 1012. second plug hole; 102. pin; 11. lifting assembly; 111. hydraulic cylinder; 112. hydraulic rod; 113. bottom plate; 12. first positioning hole; 13. second positioning hole. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] See attached Figure 1 and attached Figure 2The utility model embodiment discloses a foundation pit displacement measuring device, including a base 1, a rotating member 2, a plurality of scales 3, a plurality of groups of moving members 4, and a plurality of fixed components 5. The base 1 can be fixed to the bottom of the foundation pit in cooperation with a ground nail 6, and an angle scale 7 is provided on the base 1; the rotating member 2 is rotatably connected to the base 1, and the rotating member 2 can rotate around the base 1 in a horizontal plane, and a plurality of pointers 8 corresponding to the angle scale 7 are provided on the rotating member 2; the plurality of scales 3 can be detachably connected to the rotating member 2, and the plurality of scales 3 are all horizontally arranged; the number of groups of moving members 4 is consistent with the number of scales 3, and each scale 3 is slidably connected with a group of moving members 4, and each group of moving members 4 is composed of a plurality of moving members 4; the number of fixed components 5 is consistent with the number of moving members 4, and each moving member 4 is provided with a fixed component 5, and the fixed component 5 can be fixed to the bottom of the foundation pit, thereby fixing the relative position of the moving member 4 and the scale 3.

[0049] In actual use, multiple scales 3 are installed on the rotating member 2, multiple moving members 4 on each scale 3 are moved to the specified position, and then the base is fixed to the bottom of the foundation pit by the ground nails 6, and the moving member 4 is fixed to the bottom of the foundation pit by the fixing assembly 5. At this time, the installation of the foundation pit displacement measuring device is completed. After the foundation pit is displaced, the moving member 4 and the scale 3 will move relative to each other, and the length moved by the moving member 4 on the scale 3 can be measured according to the length scale on the scale 3. The rotating member 2 and the base 1 will rotate relative to each other, and the angle of rotation of the moving member 4 around the base 1 can be measured according to the cooperation of the pointer 8 and the angle scale 7, so as to determine the initial position of the moving member 4 The position after the displacement and displacement is taken as the origin, and the position after the displacement of the moving part 4 is taken as the end point. The distance from the origin to the end point is the linear dimension of the foundation pit displacement, and the direction from the origin to the end point is the linear direction of the foundation pit displacement. Since the direction of the foundation pit displacement is not necessarily a linear direction, the setting of multiple scales 3 on the rotating part 2 can more accurately obtain the direction of the foundation pit displacement. Since a single measurement result often has a large error, the setting of multiple moving parts 4 on a scale 3 can more accurately obtain the size of the foundation pit displacement. In general, by using the foundation pit displacement measuring device, the direction and size of the foundation pit displacement can be measured more accurately.

[0050] It should be noted that when the direction of the foundation pit displacement is a straight line, in order to prevent the mutual interference of multiple scales 3, resulting in partial force offset and deviation in the measurement result, only one scale 3 can be connected to the rotating part 2; because the staff cannot determine the direction of the foundation pit displacement, multiple foundation pit displacement measuring devices can be set at the bottom of the foundation pit, and only one scale 3 can be set on at least one foundation pit displacement measuring device, and only multiple scales 3 can be set on at least one foundation pit displacement measuring device.

[0051] When the direction of the foundation pit displacement is more complicated, such as in an arc shape, in order to more accurately measure its displacement direction, the following design is carried out in this embodiment. Specifically, the rotating member 2 is annular, and multiple scales 3 are arranged in a circular array around the rotating member 2.

[0052] In addition, since one end of the scale 7 is detachably connected to the rotating member 2, it can be stored after being disassembled, saving storage space and being easy to carry and transport.

[0053] Through the design of the above structure, the rotation angle of each scale 3 can be determined more quickly. At the same time, since the scales 3 are evenly distributed, the force on each scale 3 is also even when the foundation pit is displaced. When the displacement direction and size of each moving part 4 are combined, the actual direction and size of the foundation pit displacement are measured, which can reduce the variable factors that need to be considered.

[0054] See attached Figure 3 , Attachment Figure 8 and attached Fig. 9 In order to be able to fix the relative position of the moving part 4 and the scale 3, the following design is carried out in this embodiment. Specifically, the fixing component 5 includes two extension plates 51, a frame 52, and a ground insert 53. The two extension plates 51 are respectively arranged on the opposite sides of the moving part 4 in the horizontal direction, and each extension plate 51 is provided with a vertical guide hole 511; the frame 52 is in a rectangular ring shape, and the frame 52 has two vertical parts 521 and is respectively slidably connected in the two guide holes 511; the ground insert 53 is located at the bottom of the frame 52 and is vertically arranged. The ground insert 53 is in a nail shape and can be inserted into the ground, thereby fixing the relative positions of the frame 52, the extension plates 51, the moving part 4 and the scale 3.

[0055] Through the design of the above structure, the movable part 4 can move along the direction of the scale 3, and the scale 3 can rotate around the base 1 under the action of the rotating part 2, so the movable part 4 can change its position in the horizontal plane; when the fixed component 5 is in use, the frame 52 is pressed down, and the vertical part 521 will move downward along the guide hole 511 on the extension plate 51, and finally the ground inserting part 53 is inserted into the ground at the bottom of the foundation pit. Therefore, the fixed component 5 can only move in the vertical direction and cannot move in the horizontal plane, so that the movable part 4 cannot move in the horizontal direction, thereby fixing the relative positions of the movable part 4, the scale 3 and the base 1.

[0056] See attached Figure 4 and attached Fig.10Since the scale 3 itself is long, the end of the scale 3 away from the base 1 will inevitably sink, thereby affecting the relative movement of the scale 3 and the moving member 4. In order to solve the above problem, the following design is carried out in this embodiment. Specifically, it also includes a support component 9, which is detachably connected to the end of the scale 3 away from the base 1 so that the scale 3 is in a horizontal state. The support component 9 includes a fixed block 91, an adjusting screw 92, and a supporting member 93. The fixed block 91 is detachably connected to the end of the scale 3 away from the base 1. A vertical threaded hole 911 is provided on the fixed block 91; the adjusting screw 92 is engaged in the threaded hole 911; the supporting member 93 is located at the bottom of the adjusting screw 92, and is used to abut the ground and increase the ground contact area.

[0057] Through the design of the above structure, the distance between the fixed block 91 and the ground at the bottom of the foundation pit can be adjusted by rotating the adjusting screw 92, so that one end of the scale 3 connected to the fixed block 91 will not sink, and the moving part 4 can move on the flat scale 3. The force is evenly applied during the movement and will not be affected by additional factors.

[0058] When the adjusting screw 92 is rotating, the support member 93 will first contact the ground. Due to the friction between the support member 93 and the ground, the rotation of the adjusting screw 92 will be hindered. In order to solve the above problem, the following design is carried out in this embodiment. Specifically, the top of the support member 93 is rotatably connected to the bottom of the adjusting screw 92 to reduce the resistance encountered by the adjusting screw 92 when rotating.

[0059] With the above structural design, the support member 93 does not need to rotate after contacting the ground, while the adjusting screw rod 92 can still rotate normally with less resistance.

[0060] See attached Figure 3 , Attachment Figure 6 and attached Fig.10There are many structures that can achieve detachable connection. In order to achieve detachable connection between the scale 3 and the base 1, and between the scale 3 and the supporting assembly 9, and to simplify its structure and operation process as much as possible, the following design is carried out in this embodiment. Specifically, the scale 3 and the base 1, and between the scale 3 and the supporting assembly 9 are detachably connected through a connecting structure 10. Both ends of the scale 3 are provided with a plurality of first jacks 31. The connecting structure 10 includes a plurality of connecting members 101 and a plurality of latches 102. The base 1 is provided with a plurality of connecting members 101, and the fixing block 91 is provided with at least one connecting member 101. Each connecting member 101 is provided with There is a horizontally arranged slot 1011 and a plurality of vertically arranged second sockets 1012. The slot 1011 is arranged corresponding to the scale 3 so that the end of the scale 3 can be inserted into the slot 1011. The plurality of second sockets 1012 are arranged corresponding to the plurality of first sockets 31 respectively. The number of the plugs 102 and the first sockets 31 is the same, and each plug 102 can pass through a first socket 31 and a second socket 1012. The diameters of the first socket 31, the second socket 1012, and the plug 102 are the same, so that after the plug 102 is inserted into the first socket 31 and the second socket 1012, the relative positions of the connecting member 101 and the scale 3 can be fixed.

[0061] Through the design of the above structure, the scale 3 only needs to be inserted into the slot 1011 in the connecting member 101, and then the pin 102 is placed into the corresponding first socket 31 and second socket 1012, so as to connect the fixed scale 3 and the adapter 2, or connect the scale 3 and the supporting assembly 9, which has a simple structure, reliable connection, and convenient disassembly and assembly.

[0062] See attached Figure 2 and attached Figure 5 When the existing foundation pit displacement measuring device is taken out of the ground, it is often necessary to manually pull out the fixing parts such as the ground nails, which is time-consuming and laborious. Taking the above problem as an example, the following design is carried out in this embodiment. Specifically, it also includes a lifting component 11, which is installed on the base 1 and is used to lift the ground nail 6. The base 1 is provided with a plurality of vertically arranged first positioning holes 12, which can cooperate with the ground nail 6 to fix the base 1 to the bottom of the foundation pit. The lifting component 11 includes a hydraulic cylinder 111, a hydraulic rod 112, and a bottom plate 113. The hydraulic cylinder 111 is installed on the base 1 and is vertically arranged; the hydraulic rod 112 is driven and connected to the bottom of the hydraulic cylinder 111 and is vertically arranged; the top of the bottom plate 113 is connected to the hydraulic rod 112, and the bottom abuts the ground for support. The bottom plate 113 is provided with a plurality of second positioning holes 13, and the plurality of second positioning holes 13 respectively correspond to the plurality of first positioning holes 12, and the diameter of the second positioning hole 13 is greater than or equal to the diameter of the first positioning hole 12, so that the ground nail 6 can pass through the second positioning hole 13 and enter the ground.

[0063] Through the design of the above structure, after the use of the foundation pit displacement measuring device is completed, the base 1 is directly lifted up through the lifting component 11, so that the ground nails 6 inserted into the ground at the bottom of the foundation pit and the fixing component 5 can be pulled up, without manual operation, and all the components inserted into the ground can be pulled out at one time, which is simple, fast, time-saving and labor-saving; it should be noted that the height of the fixing component 5 and the ground nail 6 should be less than the elongation of the lifting component 11, so that the parts of the fixing component 5 and the ground nail 6 inserted into the ground can be completely pulled out.

[0064] Workers often carry out construction operations at night and in rainy weather when the light is poor. In order to be able to observe the angle and length values ​​more clearly, the following design is carried out in this embodiment. Specifically, fluorescent coatings are provided on the base 1 and the scale 3, which are used to highlight the angle scale 7 and the length scale on the scale 8, respectively.

[0065] The above structural design not only does not affect the reading of the angle scale 7 and the length scale on the ruler 8 in a dark environment, but also can highlight the position of the value, allowing for faster reading, which is convenient and quick.

[0066] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0067] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foundation pit displacement measuring device, characterized in that: include: A base, which can be fixed to the bottom of the foundation pit in cooperation with ground nails, and an angle scale is provided on the base; A rotating member, the rotating member is rotatably connected to the base, the rotating member can rotate around the base in a horizontal plane, and the rotating member is provided with a plurality of pointers corresponding to the angle scales; A plurality of scales, each of which is detachably connected to the rotating member, and each of which is horizontally arranged; A plurality of groups of moving parts, the number of the groups of moving parts is consistent with the number of the scales, each scale is slidably connected with a group of the moving parts, and each group of the moving parts is composed of a plurality of the moving parts; A plurality of fixed components, the number of the fixed components is the same as the number of the moving parts, each of the moving parts is provided with a fixed component, and the fixed components can be fixed at the bottom of the foundation pit, so as to fix the relative position of the moving parts and the scale.

2. A foundation pit displacement measuring device according to claim 1, characterized in that: The rotating member is annular, and a plurality of scales are arranged in an annular array around the rotating member.

3. A foundation pit displacement measuring device according to claim 1, characterized in that: The fixing assembly comprises: Two extension plates, which are respectively arranged on opposite sides of the moving member in the horizontal direction, and each of the extension plates is provided with a vertical guide hole; A frame body, the frame body is in a rectangular ring shape, and the frame body has two vertical parts and is respectively slidably connected in the two guide holes; A ground inserting piece is located at the bottom of the frame and is vertically arranged. The ground inserting piece is in the shape of a nail and can be inserted into the ground, so as to fix the relative positions of the frame, the extension plate, the moving piece and the scale.

4. A foundation pit displacement measuring device according to claim 1, characterized in that: It also includes a support assembly, which is detachably connected to an end of the scale away from the base so that the scale is in a horizontal state, and the support assembly includes: A fixing block, the fixing block is detachably connected to an end of the scale away from the base, and a vertical threaded hole is provided on the fixing block; an adjusting screw, the adjusting screw being engaged in the threaded hole; A support member is located at the bottom of the adjusting screw and is used for contacting the ground and increasing the ground contact area.

5. A foundation pit displacement measuring device according to claim 4, characterized in that: The top of the support member is rotatably connected to the bottom of the adjusting screw rod, so as to reduce the resistance encountered by the adjusting screw rod when the adjusting screw rod rotates.

6. A foundation pit displacement measuring device according to claim 4, characterized in that: The scale and the base, and the scale and the support assembly are detachably connected via a connecting structure, and a plurality of first jacks are provided at both ends of the scale. The connecting structure comprises: A plurality of connecting members, the base is provided with a plurality of the connecting members, the fixing block is provided with at least one of the connecting members, each of the connecting members is provided with a slot arranged horizontally and a plurality of second plug holes arranged vertically, the slot is arranged corresponding to the scale so that the end of the scale can be inserted into the slot, and the plurality of second plug holes are arranged corresponding to the plurality of first plug holes respectively; A plurality of pins, the number of the pins and the first sockets is the same, each of the pins can pass through one of the first sockets and one of the second sockets, the diameters of the first sockets, the second sockets and the pins are the same, so that after the pins are inserted into the first sockets and the second sockets, the relative positions of the connector and the scale can be fixed.

7. A foundation pit displacement measuring device according to any one of claims 1 to 6, characterized in that: It also includes a lifting assembly, which is installed on the base and used to lift up the ground nails. The base is provided with a plurality of vertically arranged first positioning holes, which can cooperate with the ground nails to fix the base at the bottom of the foundation pit. The lifting assembly includes: A hydraulic cylinder, which is mounted on the base and arranged vertically; A hydraulic rod, which is drivingly connected to the bottom of the hydraulic cylinder and is vertically arranged; A base plate, the top of which is connected to the hydraulic rod, and the bottom of which is against the ground for support. A plurality of second positioning holes are provided on the base plate, and the plurality of second positioning holes respectively correspond to the plurality of first positioning holes. The diameter of the second positioning holes is greater than or equal to the diameter of the first positioning holes, so that the ground nails can pass through the second positioning holes and enter the ground.

8. A foundation pit displacement measuring device according to any one of claims 1 to 6, characterized in that: The base and the scale are both provided with fluorescent coatings, which are used to highlight the angle scale and the length scale on the scale respectively.

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