CN211122300U - Maximum resistance to plucking check out test set of soil nail - Google Patents
Maximum resistance to plucking check out test set of soil nail Download PDFInfo
- Publication number
- CN211122300U CN211122300U CN201921809366.8U CN201921809366U CN211122300U CN 211122300 U CN211122300 U CN 211122300U CN 201921809366 U CN201921809366 U CN 201921809366U CN 211122300 U CN211122300 U CN 211122300U
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- soil nail
- screw rod
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- shaped plate
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- 239000002689 soil Substances 0.000 title claims abstract description 73
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 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
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a soil nail maximum withdrawal resistance check out test set, including riser and screw rod, the upper end of riser and the horizontal one end of fixed block rotate to be connected, the rotation axis of fixed block is perpendicular to the side of riser, the screw rod runs through the fixed block from top to bottom and rather than threaded connection, the upper end of screw rod is fixed with the handle, the lower extreme of screw rod and the upper surface of upper plate rotate through the bearing to be connected, the lower surface of upper plate and the upper surface of hypoplastron respectively with the upper and lower both ends fixed connection of spring, the lower surface of hypoplastron and U-shaped board upper surface rotate through rotating the connecting piece to be connected, the rotation axis of fixed block is parallel with; this maximum resistance to plucking power check out test set of soil nail, the top and this equipment separation of soil nail are convenient, and this equipment is compared in hollow jack weight for a short time, and it is convenient to remove.
Description
Technical Field
The utility model relates to a pull out power check out test set technical field specifically is a soil nail maximum resistance to pull out power check out test set.
Background
JGJ 120 + 2012 "construction pit support technical Specification" 5.4.10: the pulling-resistant bearing capacity of the soil nail is detected, and a step-by-step loading method can be adopted in the pulling-resistant test; the detection number of the soil nails is not less than 1% of the total number of the soil nails, and the detection number of the soil nails in the same soil layer is not less than 3; the maximum load of the test should not be less than 1.1 times of the standard value of the axial tension of the soil nail; the soil nails are detected to be selected according to the principle of random sampling, and the test is carried out after the strength of the soil nail consolidation body reaches 70% of the designed strength.
If patent No. 201820284573.5 discloses a experimental frock of foundation ditch soil nail resistance to plucking establishes hollow jack at the soil nail overcoat, and hollow jack offsets through the face that terminal surface and roof deviate from the bottom plate, and at the tip welding technology board of soil nail afterwards, the technology board size is greater than hollow jack's internal diameter, accomplishes and prepares work. During the test, hydraulic oil is pumped into the hollow jack, and two ends of the hollow jack are limited by the top plate and the process plate respectively. And then, the oil pressure is continuously increased, the pressure of the hollow jack is transmitted to the soil nail through the process plate, the soil nail is pulled out, and the counter force is transmitted to the pit wall through the tool. The oil pressure is increased to a certain value, and whether the soil nail moves or not is observed, so that the pulling strength of the soil nail is tested.
Among the prior art that above patent was disclosed, hollow jack is established to the soil nail overcoat, the tip welding technology board of soil nail for the dismantlement of soil nail resistance to plucking test fixture is inconvenient, and hollow jack's weight is great, removes inconveniently.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide a soil nail maximum withdrawal resistance check out test set, the top and this equipment separation of soil nail are convenient, and this equipment is compared in hollow jack light in weight, and it is convenient to remove, can effectively solve the background art in the soil nail overcoat establish hollow jack, the tip welding process board of soil nail for the dismantlement of soil nail withdrawal resistance test frock is inconvenient, and hollow jack's weight is great, removes inconvenient problem.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a maximum withdrawal resistance check out test set of soil nail, including riser and screw rod, the upper end of riser and the horizontally one end of fixed block are rotated and are connected, the side of the rotation axis perpendicular to riser of fixed block, the screw rod runs through the fixed block from top to bottom and rather than threaded connection, the upper end of screw rod is fixed with the handle, the lower extreme of screw rod and the upper surface of upper plate pass through the bearing and rotate and be connected, the lower surface of upper plate and the upper surface of hypoplastron respectively with the upper and lower both ends fixed connection of spring, the lower surface of hypoplastron and U-shaped board upper surface rotate through rotating the connecting piece and are connected, the.
The lower end of the vertical plate is fixedly connected with one side edge of the bottom plate, and the bottom plate is provided with a hole corresponding to the U-shaped plate.
As an optimal technical scheme of the utility model, be equipped with the telescopic link between upper plate and the hypoplastron, the upper and lower both ends of telescopic link are connected with fixed surface on upper plate lower surface and the hypoplastron respectively.
As a preferred technical scheme of the utility model, the upper surface of hypoplastron and the lower extreme fixed connection of scale, the upper end of scale is higher than the upper plate, and sliding sleeve is equipped with the movable block on the scale, the last surface contact of movable block and upper plate.
As an optimized technical scheme of the utility model, be equipped with the opening with the trompil intercommunication on the U-shaped plate, U-shaped plate open-ended direction is the same with U-shaped plate open-ended direction.
As a preferred technical solution of the present invention, the distance between the relative inner sides of the U-shaped plate gradually decreases from top to bottom.
As a preferred technical scheme of the utility model, the fixed block towards the one end of riser and the one end fixed connection of horizontal screw, the other end of horizontal screw run through the riser and with nut threaded connection.
As a preferred technical scheme of the utility model, install the U-shaped external member rather than the adaptation in the inslot of U-shaped board, the distance from the top down of the relative inboard of U-shaped external member diminishes gradually.
As an optimal technical scheme of the utility model, the rotation connecting piece is pivot, hinge or articulated seat.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the maximum uplift resistance detection equipment for the soil nails provided by the example of the utility model welds the bulges at the upper ends of the soil nails, and directly staggers the bulges of the U-shaped plates and the soil nails, so that the separation of the bulges of the equipment and the soil nails can be finished, and the equipment is convenient to disassemble; and compared with a hollow jack, the equipment has light weight and is convenient to move.
2. The utility model discloses the biggest resistance to plucking power check out test set of soil nail of example, along with the protruding pulling force increase that receives in soil nail top, the length grow of spring, the upper plate moves the movable block and removes along the scale, and the scale can take notes the biggest extension length of spring to obtain the biggest resistance to plucking power of soil nail, this equipment detects the convenience.
3. The utility model discloses the biggest resistance to plucking force check out test set of soil nail of example, when soil nail is thinner or when the welded arch is less on it, the U-shaped external member is installed on the U-shaped board, and the protruding joint of U-shaped external member and soil nail improves the suitability of this equipment.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a rear view of the structure of FIG. 1;
FIG. 3 is a schematic structural view of the U-shaped sleeve of the present invention;
fig. 4 is a schematic diagram of the structure of the inclined use state of the present invention.
In the figure: the device comprises a handle 1, a fixed block 2, a screw rod 3, a bearing 4, an upper plate 5, a spring 6, a telescopic rod 7, a lower plate 8, a U-shaped sleeve 9, a U-shaped plate 10, a bottom plate 11, a rotary connecting piece 12, a movable block 13, a scale 14, a vertical plate 15, a nut 16 and a horizontal screw rod 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows: referring to fig. 1-4, the embodiment discloses a device for detecting the maximum pullout resistance of a soil nail, which comprises a vertical plate 15 and a screw rod 3, wherein the upper end of the vertical plate 15 is rotatably connected with the horizontal end of a fixing block 2, the rotation axis of the fixing block 2 is perpendicular to the side surface of the vertical plate 15, the screw rod 3 vertically penetrates through and is in threaded connection with the screw rod, the screw rod 3 can rotate in the vertical plane along with the fixing block 2, a handle 1 is fixed at the upper end of the screw rod 3, the lifting or descending of the screw rod 3 can be adjusted through the positive and negative rotation of the handle 1, the lower end of the screw rod 3 is rotatably connected with the upper surface of the upper plate 5 through the bearing 4, the upper plate 5 cannot rotate when the screw rod 3 is lifted or descended through the bearing 4, the lower surface of the upper plate 5 and the upper surface of the lower plate 8 are fixedly connected with the upper end and the lower end of the spring 6 respectively, the lower surface of the lower plate 8 is rotatably connected with the upper surface of the U-shaped plate 10 through the rotating connecting piece 12, and the rotation axis of the fixing block 2 is parallel to the rotation axis of the.
The fixed block 2 supports the screw rod 3 to form a supporting platform of the screw rod 3, so that the screw rod 3 exerts acting force on the soil nail.
The lower extreme of riser 15 and a side fixed connection of bottom plate 11, the trompil has been seted up to the position that bottom plate 11 corresponds U-shaped plate 10, and the projection of U-shaped plate 10 on bottom plate 11 falls into the trompil completely, and the arch of soil nail passes the trompil and with U-shaped plate 10 joint.
Furthermore, an expansion link 7 is arranged between the upper plate 5 and the lower plate 8, and the upper end and the lower end of the expansion link 7 are respectively fixedly connected with the lower surface of the upper plate 5 and the upper surface of the lower plate 8; the telescopic rod 7 avoids the spring 6 from bending to influence the detection precision.
Furthermore, the upper surface of the lower plate 8 is fixedly connected with the lower end of the scale 14, the upper end of the scale 14 is higher than the upper plate 5, the scale 14 is slidably sleeved with a moving block 13, and the moving block 13 is in contact with the upper surface of the upper plate 5; along with the increase of the tensile force borne by the top end bulge of the soil nail, the length of the spring 6 is increased, the upper plate 5 drives the moving block 13 to move along the scale 14, and the scale 14 can record the maximum extension length of the spring 6, so that the maximum pulling resistance of the soil nail is obtained; the friction force between the moving block 13 and the scale 14 prevents the moving block 13 from sliding along the scale 14, and the moving block 13 can slide along the scale 14 only when the moving block 13 receives an external force.
Preferably, the moving block 13 is a hard elastic rubber block, a through hole is formed in the hard elastic rubber block, and the scale 14 passes through the through hole, and the through hole is slightly smaller than that of the scale 14
Further, the distance between the relative inner sides of the U-shaped plate 10 is gradually reduced from top to bottom, so that the U-shaped plate 10 and the soil nails can be conveniently clamped.
The rotary connector 12 of the present embodiment is a rotary shaft, a hinge or a hinge base.
The working process and principle of the embodiment are as follows:
when the top end of the soil nail is not provided with a bulge, a bulge is welded at the top end of the soil nail, the bottom plate 11 is contacted with the contact surface, the U-shaped plate 10 is clamped with the bulge at the top end of the soil nail, the position of the device and the position of the adjusting screw rod 3 are adjusted, the length direction of the screw rod 3 is parallel to the length direction of the soil nail, and the screw rod 3 is vertical or inclined relative to the bottom plate 11; when the U-shaped plate 10 inclines, the connecting piece 12 is rotated to ensure that the U-shaped plate 10 is always clamped with the top end of the soil nail in a protruding mode;
the handle 1 is rotated, the handle 1 drives the screw rod 3 to rotate, the screw rod 3 provides a tensile force for the top end of the soil nail through the bearing 4, the upper plate 5, the spring 6, the lower plate 8, the rotating connecting piece 12 and the U-shaped plate 10, the handle 1 is continuously rotated, the length of the spring 6 is increased along with the increase of the tensile force applied to the top end of the soil nail, the upper plate 5 drives the moving block 13 to move along the scale 14, the scale 14 can record the maximum extension length of the spring 6, the moving distance of the scale 14 is the maximum extension length of the spring 6, and therefore the maximum pullout resistance of the soil nail is obtained;
the separation of the equipment and the bulge of the soil nail can be finished by directly staggering the bulge of the U-shaped plate 10 and the bulge of the soil nail, and the equipment is convenient to dismantle.
Example two: as shown in fig. 1, the present embodiment discloses a device for detecting maximum pullout resistance of soil nails, which has a structure substantially the same as that of the first embodiment, except that an opening communicated with the hole is formed in the U-shaped plate 10, and the direction of the opening of the U-shaped plate 10 is the same as that of the opening of the U-shaped plate 10; the U-shaped plate 10 and the soil nail are conveniently clamped.
Example three: as shown in fig. 2, the present embodiment discloses a device for detecting the maximum pullout resistance of a soil nail, which has a structure substantially the same as that of the first embodiment, except that one end of the fixing block 2 facing the vertical plate 15 is fixedly connected with one end of the horizontal screw 17, and the other end of the horizontal screw 17 penetrates through the vertical plate 15 and is in threaded connection with the nut 16.
Preferably, the nut 16 is a wing nut, which facilitates fixing the fixing block 2.
The working process and principle of the embodiment are as follows:
when screw rod 3 and soil nail were located same straight line, thereby rotatory nut 16 was with the fixed block 2 position-fixing, avoided appearing screw rod 3 and rotated the phenomenon that receives the length direction of radial force and lead to screw rod 3 and the length direction of soil nail nonparallel.
Example four: as shown in fig. 1 and 3, the present embodiment discloses a device for detecting maximum pullout resistance of soil nails, which has a structure substantially the same as that of the first embodiment, except that a U-shaped sleeve 9 is fitted in the groove of the U-shaped plate 10, and the distance between the inner sides of the U-shaped sleeve 9 gradually decreases from top to bottom.
The working process and principle of the embodiment are as follows:
when the soil nail is thin or the projection welded on the soil nail is small, the U-shaped sleeve 9 is installed on the U-shaped plate 10, and the U-shaped sleeve 9 is clamped with the projection of the soil nail, so that the applicability of the equipment is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a soil nail maximum withdrawal resistance check out test set which characterized in that: the upper end of the vertical plate (15) is rotatably connected with one horizontal end of the fixing block (2), the rotation axis of the fixing block (2) is perpendicular to the side face of the vertical plate (15), the screw (3) vertically penetrates through the fixing block (2) and is in threaded connection with the fixing block, a handle (1) is fixed at the upper end of the screw (3), the lower end of the screw (3) is rotatably connected with the upper surface of the upper plate (5) through a bearing (4), the lower surface of the upper plate (5) and the upper surface of the lower plate (8) are respectively fixedly connected with the upper end and the lower end of a spring (6), the lower surface of the lower plate (8) is rotatably connected with the upper surface of the U-shaped plate (10) through a rotating connecting piece (12), and the rotation axis of the fixing block (2) is parallel to the rotation axis of the U-;
the lower end of the vertical plate (15) is fixedly connected with one side edge of the bottom plate (11), and the bottom plate (11) is provided with an opening corresponding to the U-shaped plate (10).
2. The soil nail maximum withdrawal resistance detecting apparatus according to claim 1, wherein: and a telescopic rod (7) is arranged between the upper plate (5) and the lower plate (8), and the upper end and the lower end of the telescopic rod (7) are fixedly connected with the lower surface of the upper plate (5) and the upper surface of the lower plate (8) respectively.
3. The soil nail maximum withdrawal resistance detecting apparatus according to claim 2, wherein: the upper surface of hypoplastron (8) and the lower extreme fixed connection of scale (14), the upper end of scale (14) is higher than upper plate (5), and sliding sleeve is equipped with movable block (13) on scale (14), and movable block (13) and the upper surface contact of upper plate (5).
4. The soil nail maximum withdrawal resistance detecting apparatus according to claim 1, wherein: the U-shaped plate (10) is provided with an opening communicated with the hole, and the opening direction of the U-shaped plate (10) is the same as the opening direction of the U-shaped plate (10).
5. The soil nail maximum withdrawal resistance detecting apparatus according to claim 1, wherein: the distance between the opposite inner sides of the U-shaped plate (10) is gradually reduced from top to bottom.
6. The soil nail maximum withdrawal resistance detecting apparatus according to claim 1, wherein: the fixed block (2) is towards the one end of riser (15) and the one end fixed connection of horizontal screw rod (17), and the other end of horizontal screw rod (17) runs through riser (15) and with nut (16) threaded connection.
7. The soil nail maximum withdrawal force detecting apparatus according to any one of claims 1 to 6, wherein: the U-shaped sleeve (9) matched with the U-shaped plate is installed in the groove of the U-shaped plate (10), and the distance between the opposite inner sides of the U-shaped sleeve (9) is gradually reduced from top to bottom.
8. The soil nail maximum withdrawal resistance detecting apparatus according to claim 1, wherein: the rotating connecting piece (12) is a rotating shaft, a hinge or a hinged seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921809366.8U CN211122300U (en) | 2019-10-25 | 2019-10-25 | Maximum resistance to plucking check out test set of soil nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921809366.8U CN211122300U (en) | 2019-10-25 | 2019-10-25 | Maximum resistance to plucking check out test set of soil nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211122300U true CN211122300U (en) | 2020-07-28 |
Family
ID=71700191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921809366.8U Expired - Fee Related CN211122300U (en) | 2019-10-25 | 2019-10-25 | Maximum resistance to plucking check out test set of soil nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211122300U (en) |
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2019
- 2019-10-25 CN CN201921809366.8U patent/CN211122300U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200728 |