CN220690635U - Ground anchor type in-situ counterforce device - Google Patents
Ground anchor type in-situ counterforce device Download PDFInfo
- Publication number
- CN220690635U CN220690635U CN202322202177.7U CN202322202177U CN220690635U CN 220690635 U CN220690635 U CN 220690635U CN 202322202177 U CN202322202177 U CN 202322202177U CN 220690635 U CN220690635 U CN 220690635U
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- jack
- steel
- shear
- ground anchor
- screw
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 68
- 239000010959 steel Substances 0.000 claims abstract description 68
- 239000011435 rock Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model discloses a ground anchor type in-situ counterforce device which is suitable for counterforce loading without a top rock layer in the vertical aspect, and comprises a second jack, a force transmission block, a first jack, a nut, screw thread steel and a first steel backing plate, wherein the second jack is tightly propped against from the front to provide shearing force, the force transmission block is arranged between the second jack and a shear box, the first jack is used for providing load in the vertical direction, the left side and the right side of the shear box are respectively provided with two screw thread steel, and the lower end of each screw thread steel is driven into the ground to serve as a ground anchor rod and is fixed through grouting; the first steel backing plate passes through all the screw steels and is locked and fixed by combining nuts, the top of the first jack is propped against the first steel backing plate, and the lower part of the first jack is used for applying vertical load to the shear box. The counterforce is applied to the jack through the screw steel, so that the structure is simple, the operability is strong, and the limit of field conditions to experiments is reduced; the height can be adjusted by the screw steel matched nuts to adapt to different shear boxes.
Description
Technical Field
The utility model relates to the technical field of geological experiments, in particular to a ground anchor type in-situ counterforce device.
Background
In-situ test values of rock and soil parameters in geotechnical engineering and geological disaster prevention and control are indispensable for guiding subsequent design and construction, but are often limited by terrain in actual in-situ tests, and lack of back pressure conditions required by in-situ tests, such as in-situ shears, load tests, failure of providing stress conditions to relevant rock layers, inconvenience in moving rock blocks to a laboratory for simulation experiment transportation, and damage to experimental rock mass can be caused.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide the ground anchor type in-situ counterforce device which has a simple structure and can provide counterforce loading for the field environment.
In order to solve the technical problems, the utility model adopts the following technical scheme: the ground anchor type in-situ counterforce device is suitable for counterforce loading of a rock layer without a top in the vertical aspect, and comprises a second jack, a force transmission block, a first jack, a nut, screw thread steel and a first steel backing plate, wherein the second jack is tightly propped against from the front to provide shearing force, the force transmission block is arranged between the second jack and a shear box, the first jack, the nut, the screw thread steel and the first steel backing plate are used for providing load in the vertical direction, at least two screw thread steels are respectively arranged on the left side and the right side of the shear box, and the lower end of each screw thread steel is driven into the ground to serve as a ground anchor rod and is fixed through grouting; the first steel backing plate passes through all the screw steels and is locked and fixed by combining nuts, the top of the first jack is propped against the first steel backing plate, and the lower part of the first jack is used for applying vertical load to the shear box.
Preferably, two pieces of screw thread steel are respectively arranged on the left side and the right side of the shear box.
Preferably, the upper and lower nuts are combined into a group, and the first steel backing plate is clamped and locked from the upper side and the lower side.
Preferably, the bottom of the first jack is propped against the roller row shaft through a double-layer steel backing plate A, and a third steel backing plate is arranged between the roller row shaft and the shear box.
Preferably, the deformed steel bar is a cylindrical deformed steel bar with the diameter of 40mm, so that the strength of the deformed steel bar is ensured.
Preferably, the lower end of the screw-thread steel is embedded into the ground by at least 40cm, so that the screw-thread steel is ensured to be stable, and the first jack bottom is provided with enough counterforce loading.
Preferably, the shear boxes are arranged at left and right intervals, and deformed steel bars between two adjacent shear boxes are used for carrying out in-situ reaction.
The utility model has the beneficial effects that: the in-situ reaction device has the advantages that the counterforce is applied to the jack through the screw steel, the structure is simple, the operability is high, the in-situ test of rock and soil parameters is convenient to carry out, the back pressure condition surrounding shear box is provided on site according to the requirement of the traditional in-situ rock shear test, and the in-situ reaction device reduces the limit of the in-situ condition on the test; the height can be adjusted by the screw steel matched nuts to adapt to different shear boxes.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
in the figure: the shear box comprises a 1-nut, 2-screw steel, a 3-first steel backing plate, a 4-first jack, a 5-double-layer steel backing plate A, a 6-double-layer steel backing plate B, a 7-roller row shaft, an 8-second jack, a 9-force transmission block, a 10-second steel backing plate, a 11-third steel backing plate and a 12-shear box.
Detailed Description
For a better understanding of the improvements of the present utility model with respect to the prior art, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments.
As shown in fig. 1, an earth anchor type in-situ reaction device is suitable for the reaction loading without a top rock layer in the vertical aspect, and mainly comprises a second jack 8 for supporting and tightly providing shearing force from the front, a force transmission block 9 arranged between the second jack 8 and a shearing force box 12, a first jack 3 for providing load in the vertical direction, a nut 1, a screw thread steel 2 and a first steel backing plate 3.
At least two screw steels 2 are arranged on the left and right sides of the shear box 12 respectively to provide enough counter force. And simultaneously, the lower end of the screw steel 2 is driven into the ground to serve as a ground anchor rod and is fixed by grouting. The first steel backing plate 3 penetrates through all the deformed steel bars 2 and is locked and fixed by combining the nuts 1, and the first steel backing plate 3 serves as a counter plate so that all the deformed steel bars 2 are stressed cooperatively. The top of the first jack 4 is abutted against the first steel backing plate 3, and the lower part of the first jack 4 is used for applying vertical load to the shear box 12 to provide load force required by experiments.
Preferably, two deformed steel bars 2 are provided on each of the left and right sides depending on the size of the shear box 12 and the magnitude of the reaction force required.
Preferably, the nuts 1 are arranged in a group from top to bottom, and the first steel backing plate 3 is clamped and locked from the top and bottom.
Preferably, the bottom of the first jack 3 is abutted against the roller row shaft 7 through a double-layer steel backing plate A5, and a third steel backing plate 11 is arranged between the roller row shaft 7 and the shear box 12.
Preferably, the deformed steel bar 2 is a cylindrical deformed steel bar having a diameter of 40mm, and satisfies the strength required for providing the reaction force.
Preferably, the lower end of the screw-thread steel 2 is embedded into the ground by at least 40cm, and is fixed by being matched with mortar pouring, so that the first jack 3 can be provided with counter force to apply load to the shear box 12.
Preferably, the shear boxes 12 are arranged at left and right intervals, and the deformed steel bars 2 between two adjacent shear boxes 12 are used for carrying out in-situ reaction force in common, so that the operation is convenient, and the experiment time is shortened.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (7)
1. The utility model provides an earth anchor formula normal position counterforce device, is applicable to the counterforce loading that does not have top rock layer in the vertical aspect, includes from the place ahead support second jack (8) that tightly provides the shear force, sets up biography power piece (9) between second jack (8) and shear force box (12), its characterized in that: the hydraulic shear device further comprises a first jack (4) for providing load in the vertical direction, a nut (1), screw steels (2) and a first steel backing plate (3), wherein at least two screw steels (2) are respectively arranged on the left side and the right side of the shear box (12), and the lower ends of the screw steels (2) are driven into the ground to serve as ground anchor rods and are fixed through grouting; the first steel backing plates (3) penetrate through all the screw steels (2) and are locked and fixed by combining nuts (1), the tops of the first jacks (4) are abutted against the first steel backing plates (3), and the lower parts of the first jacks (4) are used for applying vertical loads to the shear boxes (12).
2. The ground anchor type in-situ reaction force device according to claim 1, wherein: two deformed steel bars (2) are respectively arranged on the left side and the right side of the shear box (12).
3. The ground anchor type in-situ reaction force device according to claim 1, wherein: the upper and lower two of the nut (1) are a group, and the first steel backing plate (3) is clamped and locked from the upper side and the lower side.
4. The ground anchor type in-situ reaction force device according to claim 1, wherein: the bottom of the first jack (4) is propped against the roller row shaft (7) through the double-layer steel base plate A (5), and a third steel base plate (11) is arranged between the roller row shaft (7) and the shear box (12).
5. The ground anchor type in-situ reaction force device according to claim 1, wherein: the deformed steel bar (2) is a cylindrical deformed steel bar with the diameter of 40 mm.
6. The ground anchor type in-situ reaction force device according to claim 1, wherein: the lower end of the screw-thread steel (2) is embedded into the ground by at least 40cm.
7. The ground anchor type in-situ reaction force device according to claim 1, wherein: five shear boxes (12) are arranged at left and right intervals, and deformed steel bars (2) between two adjacent shear boxes (12) are used for carrying out in-situ reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322202177.7U CN220690635U (en) | 2023-08-16 | 2023-08-16 | Ground anchor type in-situ counterforce device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322202177.7U CN220690635U (en) | 2023-08-16 | 2023-08-16 | Ground anchor type in-situ counterforce device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220690635U true CN220690635U (en) | 2024-03-29 |
Family
ID=90374186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322202177.7U Active CN220690635U (en) | 2023-08-16 | 2023-08-16 | Ground anchor type in-situ counterforce device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220690635U (en) |
-
2023
- 2023-08-16 CN CN202322202177.7U patent/CN220690635U/en active Active
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