CN214121847U - Deep in-situ soil body loading device - Google Patents
Deep in-situ soil body loading device Download PDFInfo
- Publication number
- CN214121847U CN214121847U CN202023078064.3U CN202023078064U CN214121847U CN 214121847 U CN214121847 U CN 214121847U CN 202023078064 U CN202023078064 U CN 202023078064U CN 214121847 U CN214121847 U CN 214121847U
- Authority
- CN
- China
- Prior art keywords
- loading
- supporting shoe
- actuator
- supporting
- deep
- 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
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a deep in-situ soil body loading device, which comprises a supporting shoe, an actuator and a loading unit which are accommodated in a drilling casing and coaxially arranged; the supporting shoes comprise rigid supporting shoe boxes, supporting shoe oil cylinders contained in the rigid supporting shoe boxes and a plurality of supporting shoe bodies uniformly distributed between the rigid supporting shoe boxes and the drilling casing, the supporting shoe oil cylinders are connected with the supporting shoe bodies through telescopic connecting rods respectively, and the telescopic connecting rods are driven by the supporting shoe oil cylinders to radially and synchronously move along the drilling casing so that the corresponding supporting shoe bodies and the inner side wall of the drilling casing are in a tensioned or separated state; the loading unit comprises a soil sample protection barrel, and a loading rod, a loading head, a loading cap and a sleeve membrane which are sequentially connected and positioned in the soil sample protection barrel, and the loading unit is controlled by the actuator to load. The utility model discloses the device utilizes and is located the supporting shoe of well drilling sleeve pipe as loading reaction frame, can guarantee that the loading system appearance in-process loading force centering of ground normal position soil body in the pit is exerted on normal position soil sample.
Description
Technical Field
The utility model belongs to normal position triaxial test field in the pit, in particular to dark ground normal position soil body loading device.
Background
The stress level and particle-pore microstructure of the soil are the main influencing factors of the strength parameters of the soil body. However, the load borne by the soil body in the indoor test is greatly different from the real situation. Meanwhile, sampling often causes disturbance of a soil sample, change of a pore structure and water content, stress unloading and the like, so that the difference between soil body parameters measured in an indoor test and in-situ soil is large. For soil layers containing pebbles, gravel layers, loose sand layers, weathered rock layers and the like which are difficult to obtain high-quality soil samples, a sampling method is not suitable, and mechanical parameters of the soil layers need to be determined through in-situ testing so as to reflect the soil characteristics in a large range (relative to small tests of indoor tests).
In-situ triaxial test is the most direct method for obtaining mechanical parameters of foundation soil body, and soil body parameters are obtained by directly sampling and preparing samples on site. And to carry out triaxial test to the undisturbed soil sample at the site underground drilling, the technical problems existing at present are as follows: (1) how to cut and prepare samples; (2) how to coat a film on the soil sample in the sample preparation process; (3) how to load; (4) how to measure the deformation of the soil sample. The technical problem (2) how to carry out in-situ soil sample film covering can be solved by the existing technology (see the application number 202010664724.1 of an undisturbed soil sample film covering device in a drill hole provided by the Chinese invention patent application filed on No. 07/10 of 2020 by the applicant), and the technical problem solved by the invention is how to carry out test piece loading and how to ensure the centering of the loading in the underground after the film covering is finished.
At present, the loading of an indoor large triaxial apparatus is carried out on the ground or on a shallow surface, and the problems that the centering is difficult and the reaction frame cannot be built are solved, for example, the improved triaxial apparatus with the application number of 201010003264.4, the portable true triaxial apparatus with the application number of 200910058151.1 and the triaxial nuclear magnetic resonance testing apparatus with the application number of 201480049220.1 form the reaction frame through directly building a steel frame and carry out loading through hydraulic servo control, but the steel frame is obviously unrealistic to be built in a deeper underground, so how to realize the centering loading in the underground and build the reaction frame and combine the reaction frame with a hydraulic servo loading system is the core problem of realizing the underground loading, and no related underground loading patent can solve the problem at present.
SUMMERY OF THE UTILITY MODEL
To not enough among the above-mentioned background art, the utility model provides a deep ground normal position soil body loading device introduces and props boots device, improves to use through the design and uses in the normal position triaxial loading test in the pit to how to carry out test piece loading, the technical problem that how the loading was guaranteed in the pit after the mantle is accomplished in the solution.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a deep in-situ soil body loading device, which is characterized by comprising a supporting shoe, an actuator and a loading unit, wherein the supporting shoe, the actuator and the loading unit are accommodated in a drilling sleeve and coaxially arranged; wherein the content of the first and second substances,
the supporting shoe comprises a rigid supporting shoe box, a supporting shoe oil cylinder accommodated in the rigid supporting shoe box and a plurality of supporting shoe bodies uniformly distributed between the rigid supporting shoe box and the drilling casing, the supporting shoe oil cylinder is communicated with a supporting shoe hydraulic pipe penetrating through the top of the rigid supporting shoe box, the supporting shoe oil cylinder is connected with each supporting shoe body through a telescopic connecting rod, and each telescopic connecting rod is driven by the supporting shoe oil cylinder to move synchronously along the radial direction of the drilling casing, so that the corresponding supporting shoe body and the inner side wall of the drilling casing are in a tensioned or separated state;
the top end of a shell of the actuator is fixedly connected with the bottom of the rigid supporting shoe box, the actuator is communicated with an actuator hydraulic pipe penetrating through the supporting shoe, the bottom end of the shell of the actuator is fixedly connected with the top end of the pressurizing unit, and the actuator controls the loading unit to load;
the loading unit comprises a soil sample protection barrel, and a loading rod, a loading head, a loading cap and a sleeve membrane which are sequentially connected and positioned in the soil sample protection barrel; the top end of the soil sample protection cylinder is fixedly connected with the bottom end of a shell of the actuator, the bottom end of a piston rod of the actuator penetrates through the top end of the soil sample protection cylinder to be connected with the loading rod, and the piston rod of the actuator drives the loading rod to move along the axial direction of the soil sample protection cylinder; one end of the covering membrane is fixed between the loading head and the loading cap, and the other end of the covering membrane is fixed on the inner side wall of the bottom of the soil sample protection cylinder.
The utility model discloses a characteristics and beneficial effect:
the utility model provides a deep ground normal position soil body loading device utilizes and props boots as loading reaction frame, can be in narrow and small space in the pit, through propping boots rise tightly and carry out the centering and form the effect that the performance of reaction frame maximum benefit propped boots, then prop boots box rigid connection through will propping boots and go on smoothly in order to guarantee the loading. Because the supporting shoe is positioned in the drilling casing, the construction process of the supporting shoe is not required to be considered, and the deep in-situ triaxial test is facilitated.
Drawings
Fig. 1 is a schematic view of the overall structure of a deep in-situ soil body loading device according to an embodiment of the present invention;
fig. 2 is a top view of the deep in-situ soil loading device shown in fig. 1 before tensioning of the supporting shoe.
Fig. 3 is a top view of the deep in-situ soil loading device shown in fig. 1 after tensioning of the supporting shoes.
Reference numerals:
1: a boot support body; 2: a shoe supporting oil cylinder; 3: a shoe supporting hydraulic pipe; 4: a telescopic connecting rod; 5: a rigid boot support box; 6: an actuator; 7: an actuator hydraulic tube; 8: a loading rod; 9: a soil sample protection cylinder; 10: a loading cap; 11: a loading head; 12: soil sampling; 13: a rubber film; 14: a screw; 15: drilling a casing; 16: underground surrounding soil mass; 19: and (4) a vent hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
In order to understand the utility model discloses, the following detailed description the utility model provides a deep normal position soil body loading device's application example.
Referring to fig. 1, the deep in-situ soil loading device of the embodiment of the present invention includes a supporting shoe, an actuator 6 and a loading unit which are accommodated in a drilling casing 15 and coaxially disposed, and a soil mass 16 around the drilling casing 15 is arranged in the well. The supporting shoe comprises a rigid supporting shoe box 5, a supporting shoe oil cylinder 2 contained in the rigid supporting shoe box 5 and a plurality of supporting shoe bodies 1 (generally 2-3 supporting shoe bodies 1) uniformly distributed between the rigid supporting shoe box 5 and the well casing 15, the supporting shoe oil cylinder 2 is communicated with a supporting shoe hydraulic pipe 3 penetrating through the top of the rigid supporting shoe box 5, hydraulic oil is conveyed into the supporting shoe oil cylinder 2 through the supporting shoe hydraulic pipe 3, the supporting shoe oil cylinder 2 is connected with the supporting shoe bodies 1 through a telescopic connecting rod 4, the supporting shoe oil cylinder 2 drives the telescopic connecting rods 4 to move synchronously along the radial direction of the well casing 15, and accordingly the corresponding supporting shoe bodies 1 and the inner side wall of the well casing 15 are in a tensioning or separating state. The bottom of the rigid shoe supporting box 5 is fixedly connected with the top end of the shell of the actuator 6 (for example, see screws 14 in fig. 2 and 3), hydraulic oil is conveyed to the actuator 6 through an actuator hydraulic pipe 7 penetrating through the shoe supporting box, the bottom end of the shell of the actuator 6 is fixedly connected with the top end of the pressurizing unit, and the actuator 6 controls the loading unit to carry out loading sampling. The loading unit comprises a soil sample protection barrel 9, and a loading rod 8, a loading head 11, a loading cap 10 and a covering film 13 which are sequentially connected and positioned in the soil sample protection barrel 9; the top of a soil sample protection cylinder 9 is fixedly connected with the bottom end of a shell of an actuator 6, the bottom end of a piston rod of the actuator 6 penetrates through the top end of the soil sample protection cylinder 9 to be connected with a loading rod 8, the piston rod of the actuator 6 drives the loading rod 8 to move along the axial direction of the soil sample protection cylinder 9, one end of a sleeve membrane 13 is fixed between a loading head 11 and a loading cap 10, and the other end of the sleeve membrane 13 is fixed on the inner side wall of the bottom of the soil sample protection cylinder 9.
The embodiment of the utility model provides an in each component part concrete implementation and function respectively as follows:
the supporting shoe is used as a loading reaction frame in the loading process, so that the effective transmission of the loading force and the smooth loading can be ensured. The supporting shoes are connected with a hydraulic servo control system (a commercially available product) on the ground through supporting shoe hydraulic pipes 3, and the hydraulic servo control system controls the supporting shoe oil cylinders 2 to work. The telescopic connecting rods 4 in the supporting boots and the supporting boot bodies 1 on the outer sides of the telescopic connecting rods 4 are distributed on the outer sides of the supporting boot oil cylinders 2 in a circumferential and uniform distribution mode, one end of each telescopic connecting rod 4 is communicated with the supporting boot oil cylinders 2, and the other end of each telescopic connecting rod 4 penetrates through the side wall of the rigid supporting boot box 5 and then is connected with the corresponding supporting boot bodies 1. The rigid shoe supporting box 1 is preferably made of steel, the rigid shoe supporting box 5 is used for completely clamping the shoe supporting oil cylinder 2 in a seamless mode in the height direction, and the situation that when the shoe supporting shoe body 1 is tightly tensioned with the well drilling casing 15, the relative movement of the rigid shoe supporting box 5 and the shoe supporting oil cylinder 2 influences the centering of the soil sample cutting and loading process is avoided. The telescopic connecting rod 4 may be a product having a telescopic characteristic such as a hydraulic telescopic rod (which is a commercially available product). Referring to fig. 2, when each telescopic connecting rod 4 is driven by the shoe supporting cylinder 2 to be in a contracted state, the inner side wall of the shoe supporting body 1 is tightly attached to the outer side wall of the rigid shoe supporting box 5 and is not in contact with the drilling casing 15 (i.e. the shoe supporting body 1 and the drilling casing 15 are in a separated state), and the shoe supporting, the actuator 6 and the loading unit can freely move in the drilling casing 15; referring to fig. 3, after the loading unit reaches a specified sampling depth, the telescopic connecting rods 4 are driven by the shoe supporting oil cylinders 2 to be in an extended state, the shoe supporting bodies 1 gradually approach the drilling casing 15 until contacting the inner side wall of the drilling casing 15, and at the moment, the shoe supporting bodies 1 and the drilling casing 15 are tensioned to ensure the centering of loading and form a loading reaction frame. The size of the well casing 15 should be compatible with existing rig sizes.
The actuator 6 and the loading unit at the bottom of the actuator are used as an in-situ loading sampling and sample preparing part of the loading device. After the shoe supporting body 1 and the well drilling casing 15 are tensioned, a triaxial hydraulic servo loading system (the triaxial hydraulic servo loading system is a commercially available product) on the ground controls an actuator 6 to apply downward thrust to a loading rod 8 through an actuator hydraulic pipe 7, drives a loading head 11 and a loading cap 10 to move up and down on a soil sample protection cylinder 9, cuts and samples underground soil, and wraps the soil sample in the soil sample protection cylinder 9 by using a sleeve mold 13. In this embodiment, the cover mold 13 is a rubber film. The top of the soil sample protection barrel 9 is also provided with an air vent 19, so that air in the soil sample tube can be smoothly discharged when the soil sample tube is sleeved with a film downwards, and the smooth proceeding of the film sleeving process is ensured. In the embodiment, the diameter of the underground in-situ soil body sleeved with the covering film 13 is 100-300 mm, and the height is 100-600 mm.
To sum up, the utility model discloses a deep ground normal position soil body loading device utilizes and props boots as loading reaction frame, and this loading reaction frame is located well casing intraduct, need not to consider its process of building, and can guarantee that the loading system appearance in-process loading power centering of the normal position soil body is exerted on normal position soil sample, provides the basis for normal position triaxial test's soil sample's accuracy.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The deep in-situ soil body loading device is characterized by comprising a supporting shoe, an actuator and a loading unit which are accommodated in a drilling casing and coaxially arranged; wherein the content of the first and second substances,
the supporting shoe comprises a rigid supporting shoe box, a supporting shoe oil cylinder accommodated in the rigid supporting shoe box and a plurality of supporting shoe bodies uniformly distributed between the rigid supporting shoe box and the drilling casing, the supporting shoe oil cylinder is communicated with a supporting shoe hydraulic pipe penetrating through the top of the rigid supporting shoe box, the supporting shoe oil cylinder is connected with each supporting shoe body through a telescopic connecting rod, and each telescopic connecting rod is driven by the supporting shoe oil cylinder to move synchronously along the radial direction of the drilling casing, so that the corresponding supporting shoe body and the inner side wall of the drilling casing are in a tensioned or separated state;
the top end of a shell of the actuator is fixedly connected with the bottom of the rigid supporting shoe box, the actuator is communicated with an actuator hydraulic pipe penetrating through the supporting shoe, the bottom end of the shell of the actuator is fixedly connected with the top end of the pressurizing unit, and the actuator controls the loading unit to load;
the loading unit comprises a soil sample protection barrel, and a loading rod, a loading head, a loading cap and a sleeve membrane which are sequentially connected and positioned in the soil sample protection barrel; the top end of the soil sample protection cylinder is fixedly connected with the bottom end of a shell of the actuator, the bottom end of a piston rod of the actuator penetrates through the top end of the soil sample protection cylinder to be connected with the loading rod, and the piston rod of the actuator drives the loading rod to move along the axial direction of the soil sample protection cylinder; one end of the covering membrane is fixed between the loading head and the loading cap, and the other end of the covering membrane is fixed on the inner side wall of the bottom of the soil sample protection cylinder.
2. The deep in-situ soil loading device according to claim 1, wherein 2-3 shoe supporting bodies are uniformly distributed between the rigid shoe supporting box and the drilling casing.
3. The deep in-situ soil loading device of claim 1 wherein the rigid shoe box is made of steel.
4. The deep in-situ soil mass loading device of claim 1, wherein the rigid shoe supporting box completely blocks the shoe supporting cylinder in a height direction without a gap.
5. The deep in-situ soil loading apparatus as claimed in claim 1 wherein the size of the well casing is matched to the size of the drilling rig.
6. The deep in-situ soil loading device according to claim 1, wherein the top of the soil sample protection cylinder is provided with a vent hole.
7. The deep in-situ soil mass loading device according to claim 1, wherein the covering membrane is a rubber membrane.
8. The deep in-situ soil loading device according to claim 1, wherein the diameter of the underground in-situ soil in which the covering membrane is sleeved is 100-300 mm, and the height is 100-600 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023078064.3U CN214121847U (en) | 2020-12-20 | 2020-12-20 | Deep in-situ soil body loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023078064.3U CN214121847U (en) | 2020-12-20 | 2020-12-20 | Deep in-situ soil body loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214121847U true CN214121847U (en) | 2021-09-03 |
Family
ID=77512327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023078064.3U Active CN214121847U (en) | 2020-12-20 | 2020-12-20 | Deep in-situ soil body loading device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214121847U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112509A (en) * | 2021-12-15 | 2022-03-01 | 南京工业大学 | Soil sample membrane loading device for soil-driven triaxial test |
-
2020
- 2020-12-20 CN CN202023078064.3U patent/CN214121847U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112509A (en) * | 2021-12-15 | 2022-03-01 | 南京工业大学 | Soil sample membrane loading device for soil-driven triaxial test |
| CN114112509B (en) * | 2021-12-15 | 2022-06-07 | 南京工业大学 | Soil sample membrane loading device for soil-driven triaxial test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109030137B (en) | Experimental device and method for simulating frozen soil stratum cement sheath consolidation | |
| CN104374649B (en) | A kind of experimental rig and method for being used to observe shear deformation breaks down feature between pile tube and the slip casting soil body | |
| CN201397262Y (en) | Earthwork sample preparing instrument | |
| CN108444841B (en) | Pile-soil contact surface shearing mechanical property test method | |
| CN106869842B (en) | Coring device and method for maintaining soil body general appearance of water-bearing unconsolidated formation and application | |
| CN104198233B (en) | Three axle remoulded sample forming method and devices thereof | |
| CN207181166U (en) | A kind of anchorage body interface mechanical characteristic test device for considering surrouding rock stress and influenceing | |
| CN111504689A (en) | Jet type in-situ soil sampler | |
| CN105716967A (en) | Grout-rock interface feature test method using induction splitting grouting device | |
| CN214121847U (en) | Deep in-situ soil body loading device | |
| CN107268637A (en) | Pilot system and method for testing high stress environment anchor pole or anchorage cable anchoring interface mechanical characteristic | |
| CN214748953U (en) | Underground in-situ soil sample film covering device | |
| CN114062107B (en) | Shearing box device suitable for direct shearing tests of cylindrical samples with different sizes and application of shearing box device | |
| CN104374650A (en) | Testing device and method for testing static force shear property between tubular pile and grouting soil body | |
| CN101974905A (en) | Pile-embedding method for hollow pile and auger drill for implementing same | |
| CN110007064A (en) | A kind of the rock-boring sampling test system and sampling method of biaxial loadings | |
| WO2021012371A1 (en) | Frameless triaxial rock test apparatus and operating method | |
| CN206818523U (en) | A kind of coefficient of collapsibility of loess is layered in-situ testing device | |
| CN108931444A (en) | A kind of rock hollow cylinder scene torsion shear apparatus and test method | |
| CN204461905U (en) | A kind of test unit testing static(al) shear property between pile tube and the slip casting soil body | |
| CN112665997A (en) | Underground in-situ soil body loading device | |
| CN106226123B (en) | Large buried depth soil sampling device | |
| CN109724860B (en) | Mudstone core access device and access method thereof | |
| CN107976369B (en) | Simulation system and experimental method for synchronous grouting by shield method | |
| CN208780546U (en) | A kind of rock triaxial tension and compression experimental rig based on dynamic fatigue test machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |