Tester for geotechnical investigation

Abstract

The invention discloses a tester for geotechnical reconnaissance, and relates to the technical field of geotechnical reconnaissance, the tester comprises a fixed table fixedly installed at the tops of a plurality of columns, two sides of the fixed table are provided with conveying assemblies, the two conveying assemblies comprise first rollers installed through first supports, and the outer sides of the first rollers are provided with first conveying belts; the top face of the first conveying belt is as high as the top face of the fixing table. A round hole is formed in the center of the fixed table, a rotating top plate is rotatably mounted in the round hole, a bearing table is fixedly mounted on the inner side of the column body, a rotating base is mounted in the center of the bearing table through a rotating shaft, and the rotating base is driven by a rotating assembly; a second support is fixed to the top face of the rotating base. Rock can be conveniently conveyed to the rotating top plate, then the position of the rock on the rotating top plate is positioned and adjusted through the positioning assembly, meanwhile, disintegrating slag generated when the rock is split is protected, and the situation that personnel are injured due to the fact that the disintegrating slag splashes is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of rock and soil exploration, in particular to a measuring instrument for rock and soil exploration. Background Art

[0002] Geological exploration is an investigation and research activity that uses various means and methods to survey and detect geology, determine the appropriate bearing layer, determine the foundation type based on the bearing capacity of the bearing layer, and calculate the foundation parameters. It is the discovery of industrially significant mineral deposits during mineral surveys, and the splitting method (Brazilian test) is the most basic and widely used test method for measuring the tensile strength of rocks in geotechnical engineering circles at home and abroad.

[0003] After searching, Chinese patent application No. 2023214912888 discloses a measuring instrument for geotechnical exploration, including a box body, a moving rod is arranged at the upper end of the box body, a splitter is arranged at one end of the moving rod, and also includes: a clamping assembly, the clamping assembly is arranged on both sides of the box body, and the clamping assembly clamps the rock in the process of moving to the desired position; a placing assembly, the placing assembly is arranged on one side of the box body, and the placing assembly can stably move the rock to the desired position;

[0004] The prior art has the following deficiencies: although the existing measuring instruments have protective measures when in use, the protective effect is poor. In addition, the position of the rock blocks needs to be manually adjusted after transportation, which is not conducive to rapid adjustment and positioning of the rock blocks. In view of the above-mentioned deficiencies of the prior art, the present application proposes a measuring instrument for geotechnical survey. Summary of the invention

[0005] The purpose of the present invention is to solve the defects in the prior art and to propose a measuring instrument for geotechnical investigation.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A measuring instrument for geotechnical investigation, comprising a fixed platform fixedly mounted on the top of a plurality of columns, a transmission assembly being arranged on both sides of the fixed platform, the two transmission assemblies each comprising a roller wheel 1 mounted through a bracket 1, and a conveyor belt 1 being mounted on the outer side of the roller wheel 1, and the top surface height of the conveyor belt 1 being the same as the top surface height of the fixed platform;

[0008] A circular hole is opened in the center of the fixed platform, a rotating top plate is rotatably installed in the circular hole, a support platform is fixedly installed on the inner side of the column, a rotating base is installed in the center of the support platform through a rotating shaft, and the rotating base is driven by a rotating assembly;

[0009] A second bracket is fixed on the top surface of the rotating base, a second roller is rotatably mounted on the rotating base through the second bracket, and a second conveyor belt is mounted on the outer side of the second roller;

[0010] The fixed platform is provided with a plurality of positioning components on the periphery of the circular hole, and a plurality of moving grooves are opened on the periphery of the circular hole, and the positioning components are installed between the fixed platform and the column through the moving grooves;

[0011] A hanger is fixed on the top surface of the fixed platform, a hydraulic rod is installed downward from the bottom center of the hanger, a rake is installed downward from the telescopic end of the hydraulic rod, and a protective component is installed downward from the telescopic end of the hydraulic rod.

[0012] Furthermore, the rotating assembly includes a first motor mounted on the support platform, a first bevel gear is mounted on the driving shaft of the first motor, a bevel gear ring is fixed on the top surface of the rotating base, and the first bevel gear meshes with the bevel gear ring for transmission.

[0013] Furthermore, the positioning assembly includes a gear ring, a support plate is fixed on the inner side of the column, the gear ring is rotatably installed relative to the column through the support plate, a second motor is fixedly installed on the support plate, a driving shaft of the second motor is upwardly arranged and a gear and a second bevel gear are fixedly installed in sequence, the gear and the gear ring are meshed for transmission, two fixed plates are fixed in the movable groove, a screw rod is rotatably installed between the two fixed plates, a second bevel gear is fixed on the screw rod, the second bevel gear installed on the driving shaft of the second motor is meshed for transmission with the second bevel gear installed on the screw rod, a positioning plate is threadedly installed on the screw rod, the positioning plate has an L-shaped structure, and the upper part of the positioning plate extends to the upper side of the fixed platform, and an extrusion plate is rotatably installed on the upper part of the positioning plate through a torsion spring shaft.

[0014] Furthermore, a plurality of mounting grooves are provided on the top surface of the rotating top plate, and an auxiliary conveying assembly is installed in each mounting groove, the auxiliary conveying assembly comprising two arc guide rails fixed in the mounting grooves, two conveying rollers are installed in the two arc guide rails by rotating through an axle rods, the two conveying rollers are squeezed and contacted with each other, and the two conveying rollers are in the same vertical plane, a spring is installed between the axle rod of the conveying roller on the lower side and the arc guide rail through a bearing, the lower end of the spring is fixedly installed to the inner side of the bottom of the arc guide rail, the upper end of the spring is fixedly installed to the outer ring of the bearing, and the conveying roller on the lower side is in frictional contact with the top surface of conveyor belt 2.

[0015] Furthermore, the protection assembly includes a lifting ring, the inner side of which is mounted on the ends of a plurality of connecting plates, the other ends of the plurality of connecting plates are mounted on the telescopic ends of the hydraulic rod, and the mounting position of the connecting plates and the hydraulic rod is located above the riving knife;

[0016] Two protective plates 1 and two clamps are installed under the lifting ring, and the two protective plates 1 are arranged opposite to each other, and the two clamps are arranged opposite to each other. The lower sides of the two clamps are respectively rotatably installed with protective plates 2 through hinge seats, and the installation directions of the two protective plates 2 are parallel to the conveying direction of the conveying component, and the installation directions of the two protective plates 1 are perpendicular to the conveying direction of the conveying component.

[0017] Furthermore, the torsion spring shaft includes a small shaft rotatably mounted on the end of the positioning plate, the two ends of the small shaft are fixedly mounted via ear plates and extrusion plates, the two ends of the small shaft are respectively sleeved with torsion springs, one end of the torsion spring is fixed to the ear plate, and the other end is fixed to the end of the positioning plate.

[0018] Furthermore, a rubber plate is fixed to the side of the extrusion plate.

[0019] Furthermore, the hinge seat includes an L-shaped plate fixed to the side of the lifting ring, the lower end of the L-shaped plate is rotatably mounted on one end of the sub-shaft, and the other end of the sub-shaft is fixedly mounted on the side of the clamping plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention is provided with two conveying assemblies and an auxiliary conveying assembly, one of which can convey rock blocks stably and quickly to the rotating top plate at the fixed platform, and the conveying process reduces the labor intensity of manually adjusting the rock position, and after the splitter splits the rock, the auxiliary conveying assembly can smoothly move the rock away from the rotating top plate, and finally smoothly leave the fixed platform and enter another conveying assembly, thereby facilitating the operation surface of the rock removal device after crushing.

[0022] 2. The present invention provides a positioning assembly to position the rock on the rotating top plate and ensure that the rock is in the center of the rotating top plate, so that the splitting knife can smoothly split the rock from the center. In this process, there is no need to manually adjust the position of the rock, thereby reducing the labor intensity of the operation.

[0023] 3. The present invention provides a protective component, which can be used to intercept the debris generated by the rock splitting from all sides of the rock when the rock is split, thereby avoiding the occurrence of personal injury caused by the splashing of the debris. At the same time, the provision of the protective component is also conducive to causing the debris to gather above the rotating top plate as much as possible, thereby facilitating the subsequent cleaning of the debris on the rotating top plate.

[0024] In summary, the present invention can conveniently transport rocks to the rotating top plate, and then use the positioning assembly to position and adjust the position of the rock on the rotating top plate, while protecting the debris generated when splitting the rock to avoid splashing of debris and causing personal injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure when the middle protection component is raised;

[0028] Figure 3 It is a schematic diagram of the installation of the rotating base, rotating top plate and positioning assembly relative to the fixed platform;

[0029] Figure 4 for Figure 3 A partial cross-sectional view of the middle fixed platform;

[0030] Figure 5 It is a schematic diagram of the second motor driving the lead screw and the positioning plate through the second bevel gear;

[0031] Figure 6 for Figure 3 A magnified view of the structure of part a;

[0032] Figure 7 is a partial cross-sectional view of a rotating top plate;

[0033] Figure 8 for Figure 7 A magnified view of the structure in part b;

[0034] Fig. 9 It is a state-structure schematic diagram of the auxiliary conveying component;

[0035] Fig.10 It is a schematic diagram of the structure of the auxiliary conveying component in state 2;

[0036] Fig.11 The schematic diagram of the installation of the hanger, hydraulic rod, protection assembly and riving knife on the upper side of the fixed platform;

[0037] Fig.12 It is a state-structure diagram of the protection component;

[0038] Fig.13 This is a schematic diagram of the state 2 structure of the protection component.

[0039] In the figure: 1 column, 2 fixed platform, 3 bracket 1, 4 roller 1, 5 conveyor belt 1, 6 support platform, 7 rotating base, 71 first motor, 72 first bevel gear, 73 bevel gear ring, 8 bracket 2, 9 roller 2, 10 rotating top plate, 11 positioning component, 111 moving groove, 112 positioning plate, 113 gear ring, 114 second motor, 115 gear, 116 second bevel gear, 117 support plate, 118 fixed plate, 119 screw rod, 120 extrusion plate, 121 torsion spring shaft, 12 hanger, 13 hydraulic rod, 14 protection component, 141 connecting plate, 142 lifting ring, 143 protection plate 1, 144 clamping plate, 145 protection plate 2, 146 hinge seat, 15 transmission belt 2, 16 auxiliary conveying component, 161 arc guide rail, 162 conveying roller, 163 spring, 17 chopper. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention;

[0041] Reference Figure 1-13 , a measuring instrument for geotechnical investigation, comprising a fixed platform 2 fixedly mounted on the top of a plurality of columns 1, a transmission assembly being arranged on both sides of the fixed platform 2, the two transmission assemblies both comprising a roller 4 mounted through a bracket 3, and a conveyor belt 5 being mounted on the outer side of the roller 4, and the top surface height of the conveyor belt 5 being the same as the top surface height of the fixed platform 2;

[0042] A circular hole is opened in the center of the fixed platform 2, and a rotating top plate 10 is rotatably installed in the circular hole. A support platform 6 is fixedly installed on the inner side of the column 1. A rotating base 7 is installed at the center of the support platform 6 through a rotating shaft. The rotating base 7 is driven by a rotating assembly.

[0043] A bracket 2 8 is fixed to the top surface of the rotating base 7, a roller 2 9 is rotatably mounted on the rotating base 7 through the bracket 2 8, and a conveyor belt 2 15 is mounted on the outer side of the roller 2 9;

[0044] The fixed platform 2 is provided with a plurality of positioning components 11 at the periphery of the circular hole, and the fixed platform 2 is provided with a plurality of moving grooves 111 at the periphery of the circular hole. The positioning components 11 are installed between the fixed platform 2 and the column 1 through the moving grooves 111;

[0045] like Figure 1 In the figure, the rock is transported to the fixed platform 2 and the rotating top plate 10 by the conveying assembly on the left. After the rock moves to the rotating top plate 10, the positioning assembly 11 is used to position the rock from all sides, and the rock can be gradually positioned in the center of the rotating top plate 10, waiting to be split later.

[0046] A hanger 12 is fixed to the top surface of the fixed platform 2, a hydraulic rod 13 is installed downward from the bottom center of the hanger 12, a riving knife 17 is installed downward from the telescopic end of the hydraulic rod 13, and a protective component 14 is installed downward from the telescopic end of the hydraulic rod 13.

[0047] The hydraulic rod 13 drives the splitter 17 to move up and down to split the rock. When the hydraulic rod 13 drives the splitter 17 to split the rock, an external device is used to detect the output pressure of the hydraulic rod 13. The hardness of the rock can be determined based on the condition of the rock during breaking and the pressure data obtained by the detection.

[0048] Furthermore, the rotating assembly includes a first motor 71 mounted on the base 6, a first bevel gear 72 is mounted on the driving shaft of the first motor 71, a bevel gear ring 73 is fixed on the top surface of the rotating base 7, and the first bevel gear 72 is meshed with the bevel gear ring 73 for transmission.

[0049] The first motor 71 drives the first bevel gear 72 to engage with the bevel gear ring 73 to drive the rotating base 7, the bracket 8, the roller 9, the rotating top plate 10 and the rock to rotate simultaneously. The purpose of the rotation is to facilitate the subsequent adjustment of the placement position on the rotating top plate 10 and to facilitate the subsequent positioning component 11 to clamp and position the rock.

[0050] Furthermore, the positioning assembly 11 includes a ring gear 113, a support plate 117 is fixed to the inner side of the column 1, the ring gear 113 is rotatably mounted relative to the column 1 through the support plate 117, a second motor 114 is fixedly mounted on the support plate 117, a gear 115 and a second bevel gear 116 are arranged upwardly and fixedly mounted in sequence on the driving shaft of the second motor 114, the gear 115 is meshed with the ring gear 113 for transmission, two fixed plates 118 are fixed in the movable groove 111, and the two fixed plates 118 are fixed in the movable groove 111. A screw rod 119 is rotatably installed between 18, and a second bevel gear 116 is fixed on the screw rod 119. The second bevel gear 116 installed at the driving shaft of the second motor 114 is meshed with the second bevel gear 116 installed at the screw rod 119 for transmission. A positioning plate 112 is threadedly installed on the screw rod 119. The positioning plate 112 has an L-shaped structure, and the upper part of the positioning plate 112 extends to the upper side of the fixed platform 2. The upper part of the positioning plate 112 is rotatably installed with an extrusion plate 120 through a torsion spring shaft 121.

[0051] The second motor 114 drives the gear 115 and the second bevel gear 116 to rotate, and the gear 115 is meshed with the ring gear 113 for transmission. The second bevel gear 116 installed on the driving shaft of the second motor 114 is meshed with the second bevel gear 116 installed on the screw rod 119 for transmission. When the screw rod 119 rotates, the positioning plate 112 is controlled to move. When the positioning plate 112 moves, the rock is clamped and positioned to prevent the rock from shaking randomly when the rock is split later.

[0052] Furthermore, a plurality of mounting grooves are provided on the top surface of the rotating top plate 10, and an auxiliary conveying assembly 16 is installed in each mounting groove. The auxiliary conveying assembly 16 includes two arc guide rails 161 fixed in the mounting grooves, and two conveying rollers 162 are installed in the two arc guide rails 161 through rotation of an axis rod. The two conveying rollers 162 are squeezed and contacted with each other, and the two conveying rollers 162 are in the same vertical plane. A spring 163 is installed at the axis rod of the conveying roller 162 located on the lower side between the bearing and the arc guide rail 161, and the lower end of the spring 163 is fixedly installed to the inner side of the bottom of the arc guide rail 161, and the upper end of the spring 163 is fixedly installed to the outer ring of the bearing. The conveying roller 162 located at the lower side is in frictional contact with the top surface of the conveyor belt 15, and the driving motor controls the roller 29 to rotate, thereby driving the conveyor belt 15 to operate. When the conveyor belt 15 is in operation, the friction between the conveying roller 162 located at the lower side is used to control the rotation of the conveying roller 162 located at the lower side. The conveying roller 162 located at the lower side can then use the friction between the conveying roller 162 located at the upper side to control the rotation of the conveying roller 162 on the upper side. The rotation of the conveying roller 162 on the upper side can control the movement of the rock on the upper side, thereby realizing the movement of the rock. Considering that when the rock is placed on the rotating top plate 10, its gravity will cause both conveying rollers 162 to move downward at one end, but the displacement of the conveying roller 162 will increase the friction between the upper and lower conveying rollers 162, and also increase the friction between the conveying roller 162 located at the lower side and the conveyor belt 15, which can ensure the movement of the rock.

[0053] Furthermore, the protection assembly 14 includes a lifting ring 142, the inner side of the lifting ring 142 is installed with the ends of a plurality of connecting plates 141, the other ends of the plurality of connecting plates 141 are all installed at the telescopic end of the hydraulic rod 13, and the installation position of the connecting plate 141 and the hydraulic rod 13 is located above the riving knife 17;

[0054] Two protective plates 143 and two clamps 144 are installed under the lifting ring 142, and the two protective plates 143 are arranged opposite to each other, and the two clamps 144 are arranged opposite to each other. The lower sides of the two clamps 144 are respectively rotatably installed with protective plates 145 through hinge seats 146. The installation direction of the two protective plates 145 is parallel to the conveying direction of the conveying assembly, and the installation direction of the two protective plates 143 is perpendicular to the conveying direction of the conveying assembly.

[0055] The hydraulic rod 13 drives the splitter 17 to move up and down to split the rock. When moving up and down, it also controls the overall up and down movement of the protection assembly 14. The protection plate 1 143 and the protection plate 2 145 in the protection assembly 14 intercept the debris generated when the rock is split from the side to prevent the debris from splashing randomly and causing injuries to people. The protection plate 2 145 and the clamping plate 144 are rotatably installed to avoid obstruction when the rock is moved to the rotating top plate 10. When moving the rock, it is only necessary to rotate and open the rotating top plate 10 to facilitate the rock to enter the inner area of ​​the protection assembly 14.

[0056] The protective plate 1 143 and the protective plate 2 145 can be made of rubber plates, which can reduce the noise caused by the impact of the splashing debris when splitting the rock, and can also increase the durability while reducing the impact force of the splashing rock debris.

[0057] Furthermore, the torsion spring shaft 121 includes a small shaft rotatably mounted on the end of the positioning plate 112, and both ends of the small shaft are fixedly mounted via ear plates and the extrusion plate 120, and both ends of the small shaft are respectively sleeved with torsion springs, one end of the torsion spring is fixed to the ear plate, and the other end is fixed to the end of the positioning plate 112.

[0058] Furthermore, a rubber plate is fixed to the side of the extrusion plate 120. The rubber plate can increase the friction force of subsequent contact with the rock.

[0059] Furthermore, the hinge seat 146 includes an L-shaped plate fixed to the side of the lifting ring 142 , the lower end of the L-shaped plate is rotatably mounted to one end of the sub-shaft, and the other end of the sub-shaft is fixedly mounted to the side of the clamping plate 144 .

Claims

1. A measuring instrument for geotechnical investigation, comprising a fixed platform (2) fixedly mounted on the top of a plurality of columns (1), characterized in that: Both sides of the fixed platform (2) are provided with a conveying assembly, and the two conveying assemblies each include a roller (4) installed through a bracket (3), and a conveyor belt (5) is installed outside the roller (4), and the top surface height of the conveyor belt (5) is the same as the top surface height of the fixed platform (2); A circular hole is provided at the center of the fixed platform (2), a rotating top plate (10) is rotatably mounted in the circular hole, a support platform (6) is fixedly mounted on the inner side of the column (1), a rotating base (7) is mounted at the center of the support platform (6) via a rotating shaft, and the rotating base (7) is driven by a rotating assembly; A second bracket (8) is fixed on the top surface of the rotating base (7), a second roller (9) is rotatably mounted on the rotating base (7) through the second bracket (8), and a second conveyor belt (15) is mounted on the outer side of the second roller (9); The fixed platform (2) is provided with a plurality of positioning components (11) located on the periphery of the circular hole, and the fixed platform (2) is provided with a plurality of moving grooves (111) located on the periphery of the circular hole, and the positioning components (11) are installed between the fixed platform (2) and the column (1) through the moving grooves (111); A hanger (12) is fixed on the top surface of the fixed platform (2), a hydraulic rod (13) is installed downward at the bottom center of the hanger (12), a riving knife (17) is installed downward at the telescopic end of the hydraulic rod (13), and a protective component (14) is installed downward at the telescopic end of the hydraulic rod (13).

2. The measuring instrument for geotechnical investigation according to claim 1, characterized in that: The rotating assembly comprises a first motor (71) mounted on a support platform (6); a first bevel gear (72) is mounted on a driving shaft of the first motor (71); a bevel gear ring (73) is fixed on the top surface of the rotating base (7); and the first bevel gear (72) and the bevel gear ring (73) are meshed for transmission.

3. The measuring instrument for geotechnical investigation according to claim 1, characterized in that: The positioning assembly (11) comprises a gear ring (113), a support plate (117) is fixed on the inner side of the column (1), the gear ring (113) is rotatably mounted relative to the column (1) via the support plate (117), a second motor (114) is fixedly mounted on the support plate (117), a gear (115) and a second bevel gear (116) are arranged upwardly and fixedly mounted in sequence on the driving shaft of the second motor (114), the gear (115) and the gear ring (113) are meshed and transmitted, two fixed plates (118) are fixed in the movable groove (111), and the two fixed plates (118) A screw rod (119) is rotatably mounted between the screw rod (119) and the second bevel gear (116) is fixed on the screw rod (119). The second bevel gear (116) mounted on the driving shaft of the second motor (114) is meshed with the second bevel gear (116) mounted on the screw rod (119) for transmission. A positioning plate (112) is threadedly mounted on the screw rod (119). The positioning plate (112) is in an L-shaped structure. The upper part of the positioning plate (112) extends to the upper side of the fixed platform (2). The upper part of the positioning plate (112) is rotatably mounted with an extrusion plate (120) via a torsion spring shaft (121).

4. The measuring instrument for geotechnical investigation according to claim 1, characterized in that: The top surface of the rotating top plate (10) is provided with a plurality of mounting grooves, and an auxiliary conveying assembly (16) is installed in each mounting groove. The auxiliary conveying assembly (16) comprises two arc guide rails (161) fixed in the mounting grooves. Two conveying rollers (162) are installed in the two arc guide rails (161) through shaft rotation. The two conveying rollers (162) are in mutual extrusion contact, and the two conveying rollers (162) are in the same vertical plane. A spring (163) is installed between the shaft of the conveying roller (162) located at the lower side and the arc guide rail (161) through a bearing. The lower end of the spring (163) is fixedly installed on the inner side of the bottom of the arc guide rail (161), and the upper end of the spring (163) is fixedly installed on the outer ring of the bearing. The conveying roller (162) located at the lower side is in friction contact with the top surface of the conveyor belt 2 (15).

5. The measuring instrument for geotechnical investigation according to claim 1, characterized in that: The protection assembly (14) comprises a lifting ring (142), the inner side of the lifting ring (142) is mounted on the ends of a plurality of connecting plates (141), the other ends of the plurality of connecting plates (141) are all mounted on the telescopic ends of the hydraulic rod (13), and the mounting position of the connecting plate (141) and the hydraulic rod (13) is located above the riving knife (17); Two protective plates (143) and two clamping plates (144) are installed below the lifting ring (142), and the two protective plates (143) are arranged opposite to each other, and the two clamping plates (144) are arranged opposite to each other. The lower sides of the two clamping plates (144) are rotatably installed with protective plates (145) through hinge seats (146), and the installation directions of the two protective plates (145) are parallel to the transmission direction of the transmission component, and the installation directions of the two protective plates (143) are perpendicular to the transmission direction of the transmission component.

6. The measuring instrument for geotechnical investigation according to claim 3, characterized in that: The torsion spring shaft (121) comprises a small shaft rotatably mounted on the end of the positioning plate (112), the two ends of the small shaft being fixedly mounted via ear plates and extrusion plates (120), the two ends of the small shaft being sleeved with torsion springs, one end of the torsion spring being fixed to the ear plate, and the other end being fixed to the end of the positioning plate (112).

7. The measuring instrument for geotechnical investigation according to claim 3, characterized in that: A rubber plate is fixed to the side surface of the extrusion plate (120).

8. The measuring instrument for geotechnical investigation according to claim 5, characterized in that: The hinge seat (146) comprises an L-shaped plate fixed to the side of the lifting ring (142), the lower end of the L-shaped plate is rotatably mounted on one end of the sub-shaft, and the other end of the sub-shaft is fixedly mounted on the side of the clamping plate (144).

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