CN220961029U - Hole wall spinning shearing probe for in-situ drilling shearing test - Google Patents
Hole wall spinning shearing probe for in-situ drilling shearing test Download PDFInfo
- Publication number
- CN220961029U CN220961029U CN202323030078.1U CN202323030078U CN220961029U CN 220961029 U CN220961029 U CN 220961029U CN 202323030078 U CN202323030078 U CN 202323030078U CN 220961029 U CN220961029 U CN 220961029U
- Authority
- CN
- China
- Prior art keywords
- shear
- cylinder
- shearing
- pressing shaft
- rotary pressing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010008 shearing Methods 0.000 title claims abstract description 109
- 239000000523 sample Substances 0.000 title claims abstract description 52
- 238000012360 testing method Methods 0.000 title claims abstract description 47
- 238000005553 drilling Methods 0.000 title claims abstract description 27
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 24
- 238000009987 spinning Methods 0.000 title claims abstract description 21
- 238000003825 pressing Methods 0.000 claims abstract description 71
- 238000005452 bending Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 38
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a hole wall spinning shear probe for an in-situ drilling shear test, which comprises a shear cylinder, wherein a rotary pressing shaft is movably arranged in the shear cylinder, the lower half section of the rotary pressing shaft is of a conical structure with a downward tip and is positioned in the shear cylinder, an annular mounting groove is formed in the shear cylinder, and a plurality of shear slices are arranged in the annular mounting groove; each shear slice is provided with a matching groove, and the conical surface of the lower half section of the rotary pressing shaft is provided with a plurality of guide rail strips which are in sliding fit with the matching grooves; the lower half section of the rotary pressing shaft drives a plurality of guide rails to axially move in the shearing cylinder and drives a plurality of shearing sheets to radially stretch out and draw back to the shearing cylinder; the radial telescopic movement of the shear blade realizes that the shear blade is inserted into an undisturbed soil body, and the shear blade recovery action is performed after the shear test is performed and the test is completed. The scheme utilizes a reliable mechanical structure, realizes the shearing test of the side wall of the hole bottom, has high reliability, improves the success rate of the test, and is favorable for realizing the in-situ test of the hole bottom with higher precision.
Description
Technical Field
The utility model belongs to the field of engineering investigation, and particularly relates to a hole wall spinning shear probe for carrying out an in-situ drilling shear test and measuring in-situ shear strength parameters of a rock-soil body.
Background
The shear strength index of the rock-soil body is an important parameter for researching the mechanical property of the rock-soil body and carrying out engineering design. The common methods for measuring the shear strength of soil bodies are indoor and field tests.
The shearing test instruments in the prior art all need a shearing probe or a shearing drill bit, such as the prior 'a hole wall side expansion lifting shearing probe (ZL 202122504399.5) for drilling shearing test', and disclose a hole wall side expansion lifting shearing probe for drilling shearing test, which is characterized by comprising a first conical head and a second conical head arranged below the first conical head and connected with the first conical head; the expansion pipe penetrates through the first conical head and stretches into the second conical head; the surface of the middle part of the second conical head is provided with a plurality of shear slices distributed along the circumferential direction of the second conical head in an array manner; the surface of the shearing probe is provided with N opening positions extending from the upper part to the bottom surface along the radial direction of the shearing probe; the surface of the shearing probe is divided into N vertical surfaces by the opening positions; the shearing sheets positioned on the same vertical surface are in a group, and the shearing sheets in the same group are distributed in a staggered manner along the radial direction of the second conical head; the bottom surface of one end of the second conical head far away from the first conical head is provided with an expansion limiting device. However, the shearing probe has small area of the shearing blade inserted into the soil body, and the soil body contacted by the blade cannot be ensured to be the undisturbed soil body, so that the error of the shear strength value obtained by the shearing test is larger.
Disclosure of utility model
Aiming at the problems in the prior art, the utility model aims to provide a hole wall spinning shear probe for in-situ drilling shear test, which solves the problem that the shear strength value obtained by the shear test has larger error due to the fact that the area of a shear blade inserted into a soil body in the shear probe is smaller in the conventional shear test instrument.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
The hole wall spinning shear probe comprises a shear cylinder with openings at two ends and a hollow structure, wherein a rotary pressing shaft is movably arranged in the shear cylinder, the upper half section of the rotary pressing shaft is of a cylindrical structure, the lower half section of the rotary pressing shaft is of a conical structure with a downward tip, the rotary pressing shaft is in sliding connection with the shear cylinder, an annular mounting groove is formed in the outer circumferential wall of the bottom of the shear cylinder, and a plurality of shear slices are uniformly arranged in the annular mounting groove at intervals in the circumferential direction by taking the axis of the shear cylinder as the center; a matching groove is obliquely arranged on the inner side surface of each shear slice, and the inclination of the matching groove is the same as that of the lower half section of the rotary pressing shaft; a plurality of guide rail strips which are in sliding fit with the shearing sheet matching grooves are arranged on the conical surface of the lower half section of the rotary pressing shaft; the lower half section of the rotary pressing shaft drives the guide rails to move up and down in the shearing cylinder, and drives the shearing sheets to move in a radial expansion mode towards the shearing cylinder.
The basic principle of the utility model is as follows: when the shearing probe shears the in-situ soil, the shearing probe is fixedly connected with a drill rod of the drilling machine, then the shearing probe is placed at a preset position of the drilling hole through the drill rod, the bottom of the shearing probe is contacted with the soil body at the bottom of the drilling hole, then the rotary pressing shaft is continuously pressed down through the drill rod, vertical load is applied to the rotary pressing shaft, the rotary pressing shaft is displaced downwards relative to the shearing cylinder, then the guide rail strip on the conical surface of the lower half section of the rotary pressing shaft is matched with the matching groove on the shearing blade in the vertical downwards movement process, the shearing blades are spread towards the radial direction of the rotary pressing shaft along with the continuous vertical downwards movement of the rotary pressing shaft until the shearing blades are inserted into the original soil body, and finally axial rotary load is applied to the shearing probe through the drilling machine, so that the shearing blades are rotated, and the original soil body is sheared.
Further, the top of the upper half section of the rotary pressing shaft is provided with a connecting joint used for being connected with a drill rod, and the upper half section of the rotary pressing shaft is fixedly connected with the drill rod through the connecting joint.
Further, as a specific setting mode of a plurality of shear slices, 4 shear slices are uniformly arranged in the annular mounting groove at intervals in the circumferential direction by taking the axis of the shear cylinder as the center, each shear slice is of an arc bending plate-shaped structure, the length direction of the shear slice is in the same direction as the length direction of the shear cylinder, the 4 shear slices enclose a cylindrical structure, and the axis of the cylindrical structure coincides with the axis center of the shear cylinder.
Further, a connecting block is arranged on the inner curved surface of each shear slice in a protruding mode towards the axis center direction of the shear cylinder, each connecting block is of a right-angle trapezoid-like structure with a small upper end and a large lower end, the right-angle side surface of the connecting block is fixedly connected with the inner curved surface of the shear slice, and a matching groove is formed in the inclined side surface of the connecting block; the tank bottom of the annular mounting groove is provided with 4 notches through which the 4 connecting blocks respectively pass, the inclined side surfaces of the connecting blocks pass through the notches and are positioned in the shearing cylinder, and the matching grooves on the inclined side surfaces of the connecting blocks are in sliding fit with the guide rail strips.
Further, as a specific arrangement mode of the matching grooves and the guide rail strips, the cross section of each matching groove is a T-shaped groove; the cross section of each guide rail strip is a T-shaped block; each guide rail strip is matched with one connecting block, and the guide rail strips are arranged in the matching grooves in a sliding manner.
Further, a plurality of limit strips are uniformly arranged on the circumferential outer wall of the upper half section of the rotary pressing shaft in the shearing cylinder at intervals; the plurality of limit strips are detachably connected with the circumferential outer wall of the upper half section of the rotary pressing shaft; a plurality of limit grooves which are in sliding fit with the limit strips are arranged on the circumferential inner wall of the shearing cylinder; the limit strips and the limit grooves are all arranged along the axial direction of the rotary pressing shaft.
The cooperation of spacing and spacing groove has realized restricting the rotatory degree of freedom of rotatory pressure axle for rotatory pressure axle can only be in the shear cylinder vertical displacement, avoids rotatory pressure axle to take place relative rotation for the shear cylinder.
Further, a limit flange is arranged at the top opening of the shearing cylinder; the diameter of the inner ring of the limit flange is larger than the diameter of the upper half section of the rotary pressing shaft and smaller than the inner diameter of the shearing cylinder. The rotary pressing shaft is fixed in the shearing cylinder by the limiting flange, so that the situation that the rotary pressing shaft is separated from the shearing cylinder in the shearing test process is avoided.
Further, a rebound assembly is arranged at the bottom opening of the shearing cylinder and comprises a spring sleeve, the top end of the spring sleeve is provided with an opening, and the bottom end of the spring sleeve is closed; the top of the spring sleeve is connected with the bottom of the shearing cylinder, a reset spring is arranged in the spring sleeve, the bottom end of the reset spring is fixedly connected with the inner bottom surface of the spring sleeve, and a push plate is fixedly arranged at the top of the reset spring;
When the drill rod is pressed down, the lower half section of the driving rotary pressing shaft penetrates through the top opening of the spring sleeve to be in contact with the upper end face of the push plate. When the drill rod is pressed down, the lower half section of the rotary pressing shaft penetrates through the top opening of the spring sleeve to be in contact with the upper end face of the push plate, and the return spring is compressed. After the shearing test of the shearing probe is completed, the drill rod drives the shearing probe to lift upwards, at the moment, the rotary pressing shaft moves upwards relative to the shearing cylinder, meanwhile, the return spring pushes the rotary pressing shaft to move upwards, and the rotary pressing shaft moving upwards retracts the 4 shearing sheets into the annular mounting groove, so that the shearing sheet is actively stored; meanwhile, due to the arrangement of the rebound assembly, a certain distance is reserved between the shearing slice and the soil body at the bottom of the drilled hole, and the influence of hole wall collapse on the precision of a soil sample shearing test is eliminated.
Further, a rotary base with a cylindrical structure is arranged at the bottom of the spring sleeve, and the axis of the rotary base is coincident with the axis of the spring sleeve; the spring sleeve is internally provided with a threaded cylindrical pin, the axis of the threaded cylindrical pin coincides with the axis of the spring sleeve, and the threaded end of the threaded cylindrical pin penetrates through the bottom end of the spring sleeve to be in threaded fit with the center of the rotating base; the optical axis part of the thread cylindrical pin is in running fit with the bottom end of the spring sleeve; a thrust bearing is arranged between the rotating base and the spring sleeve.
The rotating base can rotate relative to the bottom of the spring sleeve, but torque cannot be transmitted to the spring sleeve, so that the influence of friction force between a hole bottom soil body and a shearing soil body component is eliminated in the shearing test process, and the accuracy of the undisturbed soil sample shearing test is further improved.
The beneficial effects of the utility model are as follows: 1. according to the hole wall spinning shear probe for the in-situ drilling shear test, the rotary pressing shaft is arranged, so that the shear blade is actively supported, the shear blade is inserted into an undisturbed soil body, and after the soil body is sheared, the shear blade is actively stored into the annular mounting groove, so that the shear probe is conveniently placed in and taken out of a drilling hole, the larger area of the shear blade inserted into the soil body is realized, and the accuracy of the undisturbed soil sample shear test is improved.
2. According to the hole wall spinning shear probe for the in-situ drilling shear test, through the arrangement of the rebound assembly, not only is the active storage of the shear slice realized, but also a certain distance is reserved between the shear slice and a soil body at the bottom of a drilling hole, and the influence of hole wall collapse on the precision of the soil sample shear test is eliminated.
3. According to the hole wall spinning shear probe for the in-situ drilling shear test, the rotating base is arranged, the rotating base rotates relative to the bottom of the spring sleeve, but torque cannot be transmitted to the spring sleeve, so that the influence of friction force between a hole bottom soil body and a shear soil body assembly is eliminated in the shear test process, and the accuracy of a soil sample shear test is further improved.
Drawings
FIG. 1 is a schematic three-dimensional structure of a borehole wall spinning shear probe for in situ borehole shear testing.
FIG. 2 is a schematic diagram of the internal cross-sectional structure of a bore wall spinning shear probe for in situ borehole shear testing.
Fig. 3 is a schematic structural view of the rotary pressing shaft.
Fig. 4 is a schematic view of the structure of a single shear slice.
Fig. 5 is a schematic structural view of a shear cylinder.
Fig. 6 is a schematic structural diagram of the cooperation of the rotary pressing shaft and the shear blade.
Wherein, 1, a shearing cylinder; 2. rotating the pressing shaft; 3. an annular mounting groove; 4. cutting into slices; 5. a mating groove; 6. a guide rail; 7. a connection joint; 8. a connecting block; 9. a notch; 10. a limit bar; 11. a limit groove; 12. a limiting flange; 13. a rebound assembly; 14. a spring sleeve; 15. a return spring; 16. a push plate; 17. a rotating base; 18. a threaded cylindrical pin; 19. a thrust bearing.
Detailed Description
The following description of the embodiments of the present utility model is provided to facilitate understanding of the present utility model by those skilled in the art, but it should be understood that the present utility model is not limited to the scope of the embodiments, and all the utility models which make use of the inventive concept are protected by the spirit and scope of the present utility model as defined and defined in the appended claims to those skilled in the art.
As shown in fig. 1 to 5, the utility model provides a hole wall spinning shear probe for an in-situ drilling shear test, which comprises a shear cylinder 1 with openings at two ends and a hollow structure, wherein a rotary pressing shaft 2 is movably arranged in the shear cylinder 1, the upper half section of the rotary pressing shaft 2 is of an equal-diameter cylindrical structure and is positioned outside the top end of the shear cylinder 1, the top of the upper half section of the rotary pressing shaft 2 is provided with a connecting joint 7 for connecting with a drill rod, and the upper half section of the rotary pressing shaft 2 is fixedly connected with the drill rod through the connecting joint 7.
The lower half section of the rotary pressing shaft 2 is of a conical structure with a downward tip and is positioned in the shearing cylinder 1, an annular mounting groove 3 is formed in the circumferential outer wall of the bottom of the shearing cylinder 1, and a plurality of shearing slices 4 are uniformly arranged in the annular mounting groove at intervals in an annular direction by taking the axis of the shearing cylinder 1 as the center; specifically, as shown in fig. 2 and fig. 4, as a specific arrangement mode of the plurality of shear slices 4, 4 shear slices 4 are uniformly arranged in the annular mounting groove at intervals in the circumferential direction by taking the axis of the shear cylinder 1 as the center, each shear slice 4 is in a circular arc bending plate-shaped structure, the length direction of the shear slice 4 is in the same direction as the length direction of the shear cylinder 1, the 4 shear slices 4 enclose a cylindrical structure, and the axis of the cylindrical structure coincides with the axis center of the shear cylinder 1.
A matching groove 5 is obliquely arranged on the inner side surface of each shear blade 4, and the inclination of the matching groove 5 is the same as that of the lower half section of the rotary press shaft 2. As a specific arrangement mode of the matching grooves 5, a connecting block 8 is convexly arranged on the inner curved surface of each shearing sheet 4 towards the axial center direction of the shearing cylinder 1, each connecting block 8 is of a right-angle trapezoid-like structure with a small upper end and a large lower end, the right-angle side surface of the connecting block 8 is fixedly connected with the inner curved surface of the shearing sheet 4, and the inclined side surface of the connecting block 8 is provided with the matching groove 5; the tank bottom of the annular mounting groove 3 is provided with 4 notches 9 which are respectively penetrated by the 4 connecting blocks 8, the inclined side surfaces of the connecting blocks 8 penetrate through the notches 9 and are positioned in the shearing cylinder 1, and the matching grooves 5 on the inclined side surfaces of the connecting blocks are in sliding fit with the guide rail strips 6.
As shown in fig. 2 to 5, a plurality of guide rails 6 which are in sliding fit with the plurality of fit grooves 5 are arranged on the conical surface of the lower half section of the rotary pressing shaft 2; the lower half section of the rotary pressing shaft 2 drives a plurality of guide rail strips 6 to move up and down in the axial direction of the shearing cylinder 1, and drives a plurality of shearing sheets 4 to move in a radial expansion mode of the shearing cylinder 1.
As a specific arrangement mode of the matching grooves 5 and the guide rail strips 6, the cross section of each matching groove 5 is a T-shaped groove; the cross section of each guide rail strip 6 is a T-shaped block; each guide rail strip 6 is matched with one connecting block 8, and the guide rail strips 6 are arranged in the matching grooves 5 in a sliding manner.
When the shearing probe shears the in-situ soil, the shearing probe is fixedly connected with a drill rod of the drilling machine, then the shearing probe is placed at a preset position of the drilling hole through the drill rod, the bottom of the shearing probe is contacted with the soil body at the bottom of the drilling hole, then the rotary pressing shaft 2 is continuously pressed down through the drill rod, vertical load is applied to the rotary pressing shaft 2, the rotary pressing shaft 2 is displaced downwards relative to the shearing cylinder 1, and then the guide rail strips 6 on the conical surface of the lower half section of the rotary pressing shaft 2 are matched with the matching grooves 5 on the shearing sheets 4 in the vertical downward movement process of the rotary pressing shaft 2, so that a plurality of shearing sheets 4 are spread towards the radial direction of the rotary pressing shaft 2 along with the continuous vertical downward movement of the rotary pressing shaft 2 until the shearing sheets 4 are inserted into the original soil body, the area of the shearing sheets 4 inserted into the soil body is larger, and the accuracy of the original soil sample shearing test is improved; and finally, applying an axial rotation load to the shearing probe through the drilling machine to enable the shearing sections 4 to rotate so as to shear undisturbed soil.
In this embodiment, as shown in fig. 2, 3, 5 and 6, preferably, but not limited to, a plurality of limit strips 10 are uniformly arranged on the circumferential outer wall of the upper half section of the rotary pressing shaft 2 in the shear cylinder 1 at annular intervals; the plurality of limit strips 10 are detachably connected with the circumferential outer wall of the upper half section of the rotary pressing shaft 2; a plurality of limit grooves 11 which are in sliding fit with a plurality of limit strips 10 are formed in the circumferential inner wall of the shearing cylinder 1; the limit strips 10 and the limit grooves 11 are arranged along the axial direction of the rotary pressing shaft 2. The cooperation of spacing 10 and spacing groove 11 has realized restricting the rotatory degree of freedom of rotatory pressure axle 2 for rotatory pressure axle 2 can only be in the vertical displacement of shear cylinder 1, avoids rotatory pressure axle 2 to take place relative rotation for shear cylinder 1.
Meanwhile, a limit flange 12 is arranged at the top opening of the shearing cylinder 1; the diameter of the inner ring of the limit flange 12 is larger than the diameter of the upper half section of the rotary pressing shaft 2 and smaller than the inner diameter of the shearing cylinder 1. The rotary pressing shaft 2 is fixed in the shearing cylinder 1 by the limiting flange 12, so that the condition that the rotary pressing shaft 2 is separated from the shearing cylinder 1 in the shearing test process is avoided.
A rebound assembly 13 is arranged at the bottom opening of the shearing cylinder 1, the rebound assembly 13 comprises a spring sleeve 14, the top end of the spring sleeve 14 is provided with an opening, and the bottom end of the spring sleeve is closed; the top of the spring sleeve 14 is connected with the bottom of the shearing cylinder 1, a return spring 15 is arranged in the spring sleeve 14, the bottom end of the return spring 15 is fixedly connected with the inner bottom surface of the spring sleeve 14, and a push plate 16 is fixedly arranged at the top of the return spring 15;
When the drill rod is pressed down, the lower half section of the driving rotary pressing shaft 2 passes through the top opening of the spring sleeve 14 and is contacted with the upper end face of the push plate 16. When the drill rod is pressed down, the lower half section of the rotary pressing shaft 2 passes through the top opening of the spring sleeve 14 to be in contact with the upper end surface of the push plate 16, and compresses the return spring. After the shearing test of the shearing probe is completed, the drill rod drives the shearing probe to lift upwards, at the moment, the rotary pressing shaft 2 moves upwards relative to the shearing cylinder 1, meanwhile, the return spring pushes the rotary pressing shaft 2 to move upwards, and the rotary pressing shaft 2 which moves upwards contracts the 4 shearing sheets 4 back into the annular mounting groove 3, so that the shearing sheet 4 is actively stored; meanwhile, due to the arrangement of the rebound assembly 13, the shearing sheet 4 is at a certain distance from the soil body at the bottom of the drilled hole, and the influence of hole wall collapse on the precision of a soil sample shearing test is eliminated.
The bottom of the spring sleeve 14 is provided with a rotary base 17 with a cylindrical structure, and the axis of the rotary base 17 coincides with the axis of the spring sleeve 14; the spring sleeve 14 is internally provided with a threaded cylindrical pin 18, the axis of the threaded cylindrical pin 18 coincides with the axis of the spring sleeve 14, and the threaded end of the threaded cylindrical pin 18 passes through the bottom end of the spring sleeve 14 and is in threaded fit with the center of the rotating base 17; the optical axis part of the threaded cylindrical pin 18 is in rotary fit with the bottom end of the spring sleeve 14; a thrust bearing 19 is arranged between the swivel base 17 and the spring sleeve 14.
The rotating base 17 can rotate relative to the bottom of the spring sleeve 14, but torque cannot be transmitted to the spring sleeve 14, so that the influence of friction force between a hole bottom soil body and a shearing soil body component is eliminated in the shearing test process, and the accuracy of the undisturbed soil sample shearing test is further improved.
Claims (9)
1. The hole wall spinning shear probe for the in-situ drilling shear test is characterized by comprising a shear cylinder with openings at two ends and a hollow structure, wherein a rotary pressing shaft is movably arranged in the shear cylinder, the upper half section of the rotary pressing shaft is of a cylindrical structure, the lower half section of the rotary pressing shaft is of a conical structure with a downward tip, the rotary pressing shaft is slidably connected with the shear cylinder, an annular mounting groove is formed in the outer wall of the circumference of the bottom of the shear cylinder, and a plurality of shear slices are uniformly arranged in the annular mounting groove at intervals in the circumferential direction by taking the axis of the shear cylinder as the center; a matching groove is obliquely arranged on the inner side surface of each shear slice, and the inclination of the matching groove is the same as that of the lower half section of the rotary pressing shaft; a plurality of guide rail strips which are in sliding fit with the shearing sheet matching grooves are arranged on the conical surface of the lower half section of the rotary pressing shaft; the lower half section of the rotary pressing shaft drives a plurality of guide rail strips to move up and down in the shearing cylinder, and drives a plurality of shearing sheets to move in a radial telescopic way towards the shearing cylinder.
2. The hole wall spinning shear probe for in-situ borehole shear testing according to claim 1, wherein a top of the upper half of the rotary press shaft is provided with a connection joint for connection with a drill pipe.
3. The hole wall spinning shear probe for in-situ drilling shear test according to claim 1, wherein 4 shear blades are uniformly arranged in the annular mounting groove at annular intervals by taking the axis of the shear cylinder as a center, each shear blade is of an arc bending plate-shaped structure, the length direction of the shear blade is the same as the length direction of the shear cylinder, the 4 shear blades enclose a cylindrical structure, and the axis of the cylindrical structure coincides with the center of the axis of the shear cylinder.
4. The hole wall spinning shear probe for in-situ drilling shear test according to claim 3, wherein a connecting block is convexly arranged on the inner curved surface of each shear slice towards the axial center direction of the shear cylinder, each connecting block is of a right-angle trapezoid structure with a small upper end and a large lower end, the right-angle side surface of the connecting block is fixedly connected with the inner curved surface of the shear slice, and the inclined side surface of the connecting block is provided with a matching groove; the tank bottom of the annular mounting groove is provided with 4 notches for the 4 connecting blocks to pass through, the inclined side surfaces of the connecting blocks pass through the notches and are positioned in the shearing cylinder, and the matching grooves on the inclined side surfaces of the connecting blocks are in sliding fit with the guide rail strips.
5. The hole wall spinning shear probe for in-situ borehole shear testing as recited in claim 4, wherein each of said mating grooves has a T-shaped groove structure in cross section; the cross section of each guide rail strip is a T-shaped block; each guide rail strip is matched with one connecting block, and the guide rail strips are arranged in the matching grooves in a sliding manner.
6. The hole wall spinning shear probe for in-situ drilling shear test according to claim 1, wherein a plurality of limit strips are uniformly arranged on the circumferential outer wall of the upper half section of the rotary pressing shaft in the shear cylinder at annular intervals; the limiting strips are detachably connected with the circumferential outer wall of the upper half section of the rotary pressing shaft; a plurality of limit grooves which are in sliding fit with the limit strips are arranged on the circumferential inner wall of the shearing cylinder; the limit strips and the limit grooves are all arranged along the axial direction of the rotary pressing shaft.
7. The hole wall spinning shear probe for in-situ drilling shear test of claim 1, wherein a limit flange is arranged at the top opening of the shear cylinder; the diameter of the inner ring of the limit flange is larger than the diameter of the upper half section of the rotary pressing shaft and smaller than the inner diameter of the shearing cylinder.
8. The hole wall spinning shear probe for in-situ borehole shear testing according to claim 2, wherein a rebound assembly is provided at the bottom opening of the shear cylinder, the rebound assembly comprising a spring sleeve having an opening at the top end and a closed bottom end; the top of the spring sleeve is connected with the bottom of the shearing cylinder, a reset spring is arranged in the spring sleeve, the bottom end of the reset spring is fixedly connected with the inner bottom surface of the spring sleeve, and a push plate is fixedly arranged at the top of the reset spring;
When the drill rod is pressed down, the lower half section of the rotary pressing shaft is driven to pass through the top opening of the spring sleeve to be in contact with the upper end face of the push plate.
9. The hole wall spinning shear probe for in-situ drilling shear test according to claim 8, wherein a rotary base with a cylindrical structure is arranged at the bottom of the spring sleeve, and the axis of the rotary base coincides with the axis of the spring sleeve; the spring sleeve is internally provided with a threaded cylindrical pin, the axis of the threaded cylindrical pin coincides with the axis of the spring sleeve, and the threaded end of the threaded cylindrical pin penetrates through the bottom end of the spring sleeve to be in threaded fit with the center of the rotating base; the optical axis part of the thread cylindrical pin is in running fit with the bottom end of the spring sleeve; a thrust bearing is arranged between the rotating base and the spring sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323030078.1U CN220961029U (en) | 2023-11-08 | 2023-11-08 | Hole wall spinning shearing probe for in-situ drilling shearing test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323030078.1U CN220961029U (en) | 2023-11-08 | 2023-11-08 | Hole wall spinning shearing probe for in-situ drilling shearing test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220961029U true CN220961029U (en) | 2024-05-14 |
Family
ID=91025439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323030078.1U Active CN220961029U (en) | 2023-11-08 | 2023-11-08 | Hole wall spinning shearing probe for in-situ drilling shearing test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220961029U (en) |
-
2023
- 2023-11-08 CN CN202323030078.1U patent/CN220961029U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109290620B (en) | Steel pipe cutting device | |
| CN111504689A (en) | Jet type in-situ soil sampler | |
| CN117191601B (en) | Hole wall spinning shearing device for in-situ drilling shearing test and test method | |
| CN108286417B (en) | Deep water turbine hydraulic internal cutting tool | |
| CN115184073B (en) | Rock core sampling device for geotechnical engineering | |
| CN220961029U (en) | Hole wall spinning shearing probe for in-situ drilling shearing test | |
| CN113607573B (en) | In-situ shearing test device and method for loess in hole | |
| CN105568951A (en) | Drilling device and hole forming method of pre-drilling type lateral pressure test | |
| CN114624126B (en) | Rock-soil in-situ shearing test equipment and method | |
| CN109001433B (en) | deep soil moisture punching measurement method | |
| CN112255011A (en) | Depth-measurable geotechnical sampling device and method for geotechnical engineering investigation | |
| CN113514347B (en) | In-situ shearing test device and method in hole | |
| CN111982583A (en) | Multifunctional agricultural storage sampling tube | |
| CN109487774B (en) | Pre-drilling type lateral pressure test drilling equipment and hole forming method thereof | |
| CN110186780A (en) | A kind of high-precision borehole shear test apparatus and method | |
| CN110108617B (en) | Locking device for concrete anti-seepage instrument | |
| CN209027817U (en) | A kind of Manual hydraulic sampling machine | |
| CN112324388A (en) | Ball-throwing-free pressure test circulating sliding sleeve | |
| CN220450817U (en) | Compactness check out test set is used in road bed construction | |
| CN111853014A (en) | Diagonal bracing anti-seismic anchor bolt | |
| CN113916648B (en) | Annular plane reducing device for hole | |
| CN112627728B (en) | Drilling tool capable of adjusting face angle of directional drilling tool in underground | |
| RU2256771C1 (en) | Well pipe cutter | |
| CN213764115U (en) | Efficient is steel pipe puncher for office furniture | |
| CN116163723B (en) | Geological survey probing soil sampling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |