CN111811871A - Undisturbed soil sample film sleeving device in drilling - Google Patents
Undisturbed soil sample film sleeving device in drilling Download PDFInfo
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- CN111811871A CN111811871A CN202010664724.1A CN202010664724A CN111811871A CN 111811871 A CN111811871 A CN 111811871A CN 202010664724 A CN202010664724 A CN 202010664724A CN 111811871 A CN111811871 A CN 111811871A
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- 239000002689 soil Substances 0.000 title claims abstract description 79
- 238000005553 drilling Methods 0.000 title description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims description 62
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 12
- 241001330002 Bambuseae Species 0.000 claims description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 12
- 239000011425 bamboo Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000314 lubricant Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000007888 film coating Substances 0.000 claims description 5
- 238000009501 film coating Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 235000014121 butter Nutrition 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims 2
- 230000001070 adhesive effect Effects 0.000 claims 2
- 239000004264 Petrolatum Substances 0.000 claims 1
- 229940066842 petrolatum Drugs 0.000 claims 1
- 235000019271 petrolatum Nutrition 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 21
- 238000012360 testing method Methods 0.000 abstract description 19
- 238000011065 in-situ storage Methods 0.000 abstract description 16
- 238000002360 preparation method Methods 0.000 abstract description 9
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract 2
- 239000000523 sample Substances 0.000 description 90
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 11
- 238000005070 sampling Methods 0.000 description 7
- 239000003673 groundwater Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229940099259 vaseline Drugs 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an undisturbed soil sample film covering device in a drill hole, which aims to solve the technical problem of difficult film covering of a soil sample in a rock-soil in-situ triaxial test. The original soil sample film covering device in the drill hole comprises a film covering protection cylinder, a pressure compensation air inlet fixed at the top end of the film covering protection cylinder, a differential pressure sensor, a film, a sample loading head and a sample top cap, wherein the differential pressure sensor, the film, the sample loading head and the sample top cap are fixed inside the film covering protection cylinder; the pressure compensation air inlet is communicated with the cavity; the differential pressure sensor is used for measuring the pressure difference of pore water pressure in the cavity and the interior of the undisturbed soil sample; one end of the film is fixed between the sample loading head and the sample top cap, and the other end of the film is fixed by a fixed compression ring on the side wall of the bottom of the film sleeving protection cylinder in a mode of bending upwards and then bending downwards. In the cutting and sample preparation process, the film descends synchronously along with the film covering protection cylinder under the pressure compensation effect, so that soil cutting and film covering are realized, and an undisturbed soil sample is protected to the maximum extent.
Description
Technical Field
The invention relates to an in-situ triaxial test film covering method, in particular to a film covering device capable of synchronously cutting and sampling field undisturbed soil and covering a film.
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 means for obtaining mechanical parameters of foundation soil body, and soil body parameters are obtained by directly sampling and preparing samples on site. And the triaxial test is carried out on the undisturbed soil sample by drilling holes on site and underground, a membrane is sleeved on the cylindrical soil sample at the bottom of the hole, so that the horizontal stress can be applied to the soil body to simulate the horizontal extrusion state of the surrounding soil body, and then the shear stress is applied, thereby obtaining the anti-shear mechanical parameters of the soil body. The difficulty of the prior in-situ triaxial test coating is as follows:
1) the automation problem is as follows: because the drilling depth of the in-situ test can reach tens of meters and hands can not reach the bottom of the hole, no method is available for manual film covering, and automatic film covering must be realized simultaneously in the process of advancing cutting of the probe;
2) disturbance of the soil sample: because the soil sample strength of the in-situ triaxial test is usually not high, if the membrane is not scientifically folded in advance, the forced membrane sheathing of the soil sample can seriously disturb the soil sample, even cause soil sample damage, so that the membrane can not apply additional load to the soil sample in the membrane sheathing process;
3) the problem of underground water: in high groundwater level areas, a drilled hole is often deeper than a groundwater level line, groundwater can apply upward buoyancy to experimental equipment under the hole, the difference between the internal pressure and the external pressure of the film is too large, and the film covering process is further influenced.
Aiming at the problem of acquiring undisturbed dynamic characteristic parameters of a soil body on site, the first in-situ triaxial test technology of the deep soil body in the world was developed by MFRiemer et al of Berkeley school of California university in the United states in 2007, sampling is completely cancelled, and dynamic parameters of the soil body are directly measured by drilling the deep part, cutting a soil sample and developing a triaxial test in situ. The MF Riemer instrument cuts soil downwards by using a main force cutting head to form a soil sample with the diameter of 10cm and the height of 40cm, and meanwhile, the inner cavity is filled with gas to keep the pressure measurement of the soil column during cutting and enable a rubber film to cling to the wall of the cutting pipe to move downwards. Air pressure is formed between the soil sample and the pipe wall, so that stress unloading of the soil sample is avoided; after cutting into soil samples, the film was pressed out of the film to attach the entire film to the sample to make an in situ sample, the entire process being approximately 20 minutes. And finally, carrying out a triaxial loading shear test on the in-situ soil sample. Research by professor Riemer shows that the influence of sampling disturbance on soil shear modulus measurement reaches more than 20%.
However, the success rate of the test device and method taught by Riemer is low in the actual use process because the air pressure is used to maintain the soil sample in the cutting and sample preparation process, the whole process needs to be maintained for about 20 minutes, after the soil sample is cut, the membrane is pressed outside the membrane to be attached to the sample, the theoretically feasible and practical operation is extremely difficult, and the membrane cannot protect the soil sample in time in the 20 minutes of the cutting process.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides the undisturbed soil sample film covering device in the drilling, which realizes the automation of film covering, realizes the film covering while cutting soil, reduces the disturbance of a soil sample to the maximum extent and solves the influence on the film under the condition of underground water.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an undisturbed soil sample film covering device in a drill hole, which is characterized by comprising a film covering protection cylinder, a pressure compensation air inlet fixed at the top end of the film covering protection cylinder, a differential pressure sensor, a film, a sample loading head and a sample top cap, wherein the differential pressure sensor, the film, the sample loading head and the sample top cap are fixed in the film covering protection cylinder; the pressure compensation air inlet is arranged at the top end of the film covering protection cylinder and is communicated with the cavity; the differential pressure sensor is provided with two interfaces, the first interface is arranged on the inner side of the top end of the film-covering protective sleeve and used for measuring the pressure in the cavity, one end of the second interface is arranged on the inner side of the top end of the film-covering protective sleeve, and the other end of the second interface is arranged at the bottom of the sample loading head, penetrates through the sample top cap and is communicated with an original state soil sample and used for measuring the pore water pressure in the original state soil sample; one end of the membrane is fixed in between sample loading head and the sample hood, the other end of the membrane is followed earlier the sample hood lateral wall downwardly extending until reaching fold edge behind the sample hood bottom fold again after the sample hood lateral wall upwardly extending one section distance fold edge again the mantle protection section of thick bamboo inside wall downwardly extending to mantle protection section of thick bamboo bottom is fixed by the fixed clamping ring on the mantle protection section of thick bamboo inside wall.
Further, when the pressure measured by the first interface and the pressure measured by the second interface have a difference value, the pressure compensation air inlet applies compensation pressure with the difference value to the cavity, so that the pressure value in the cavity is balanced with the pore water pressure of the undisturbed soil sample.
The invention has the following characteristics and beneficial effects:
the undisturbed soil sample film sleeving device in the drill hole enables the film to automatically and synchronously descend along with the cutting cylinder, and realizes 'soil cutting and film sleeving' to protect an undisturbed soil sample to the maximum extent. Aiming at the influence of underground water probably existing in the film covering process, the invention ensures that the balance of the internal pressure and the external pressure of the film is not influenced by the buoyancy of the underground water by arranging the differential pressure sensor and the pressure compensation device. In addition, in order to prevent the membrane folded layer from being adhered and prevent mud water at the bottom of the hole from entering the folded layer to abrade the membrane, the side of the membrane 1 which is not contacted with the undisturbed soil sample is coated with a semi-solid lubricant.
In conclusion, the invention realizes the automation of film covering, realizes 'cutting soil and covering film' to reduce disturbance of soil sample to the maximum extent, and solves the influence on the film under the condition of underground water.
Drawings
Fig. 1 is a schematic diagram of a pre-filming structure of a filming device according to an embodiment of the present invention.
Fig. 2 is a detail view of the folding of the membrane in the membrane installation according to fig. 1.
Fig. 3 is a schematic structural diagram of the film covering device in fig. 1 in the film covering process.
Fig. 4 is a schematic structural diagram of the film covering device in fig. 1 after film covering is completed.
Reference numerals:
1: a film; 2: a sample top cap; 3: a membrane-fixed compression ring; 4: a loading head; 5: a cavity; 6: a differential pressure sensor; 7: a pressure compensated air inlet; 8: a film-covering protection cylinder; 9: soil sampling; 10: and a loading rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, 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 better understand the invention, the following detailed description is provided for an application example of the undisturbed soil sample film coating device in the borehole.
Referring to fig. 1 and 2, the original soil sample coating device in a borehole of the embodiment of the present invention includes a coating protection cylinder 8, a pressure compensation air inlet 7 fixed at the top end of the coating protection cylinder 8, and a differential pressure sensor 6, a membrane 1, a sample loading head 4 fixedly connected to the membrane 1, and a sample top cap 2 fixed inside the coating protection cylinder 8, wherein a cavity 5 is formed between the sample loading head 4 and the inner wall of the coating protection cylinder 8, and the pressure compensation air inlet 7 is communicated with a pressure compensation container on the ground through a pipeline (neither the pipeline nor the pressure compensation container is shown in the figure). Wherein, the pressure compensation air inlet 7 is arranged at the top end of the film covering protection cylinder 8 and is communicated with the cavity 5. The differential pressure sensor 6 is provided with two interfaces 6-1 and 6-2, the first interface 6-1 is installed on the inner side of the top end of the sleeve membrane protective sleeve 8 and used for measuring the pressure in the cavity 5, one end of the second interface 6-2 is installed on the inner side of the top end of the sleeve membrane protective sleeve 8, the other end of the second interface 6-2 is installed at the bottom of the sample loading head 4 and is communicated with the sample after penetrating through the sample top cap 2 and used for measuring the pore water pressure in the sample, the difference value of the pressure measured by the first interface 6-1 and the second interface 6-2 is the difference value of the compensating pressure to be applied to the cavity 5, and the pressure compensating device can adjust the pressure of the cavity 5 compensated through the pressure compensating air inlet 7 in real time through the work of the differential pressure sensor 6, so that the pressure value in. One end of the membrane 1 is fixed between the sample loading head 4 and the sample top cap 2, and the other end of the membrane 1 firstly extends downwards along the side wall of the sample top cap 2 until reaching the bottom of the sample top cap 2, and then is folded to extend upwards for a certain distance along the side wall of the sample top cap 2, and then is folded again to extend downwards along the inner side wall of the sleeve membrane protection cylinder 8 to the bottom of the sleeve membrane protection cylinder 8, and is fixed by the fixing compression ring 3 on the inner side wall of the sleeve membrane protection cylinder 8. The film-coating protection cylinder 8, the sample top cap 2 and the loading head 4 are components of an in-situ triaxial apparatus.
The specific implementation and functions of each component in this embodiment are described as follows:
the mantle protection cylinder 8, the loading head 4 and the sample top cap 2 enclose a cavity 5 for accommodating a collected undisturbed soil sample 9, see fig. 3 and 4. The loading head 4 is connected to a driving device (not shown in the figures and not belonging to the scope of the present invention) through a loading rod 10, and the driving device drives the loading head 4 to move up and down in the film-covering protection cylinder 8. The sample top cap 2 is used to transfer an applied load to an undisturbed soil sample therebelow. The material of the film-covering protection cylinder 8 is aluminum alloy, and the material of the loading head 4 and the sample top cap is 316 stainless steel.
Considering the influence of groundwater probably existing in the film covering process, the pressure balance of the inner side and the outer side of the film 1, namely the side where the film 1 is contacted with and not contacted with the undisturbed soil sample 9, is not influenced by the buoyancy of the groundwater by arranging the differential pressure sensor 6 and the pressure compensation air inlet 7, and the soil cutting and film covering are further realized. Specifically, when underground water exists, the differential pressure sensor 6 is used for measuring the difference between the air pressure in the cavity 5 and the external underground water pressure, and compensates and adjusts the air pressure in the cavity 5 in real time through the pressure compensation air inlet 7, so that the air pressure in the cavity 5 is always equal to the underground water pressure, and the membrane 1 which is folded in advance is enabled not to be influenced by the buoyancy of the water and to move upwards.
Membrane 1 is located loading head 4, between sample hood 2 and the cover membrane protection section of thick bamboo 8, and adopt above-mentioned folding mode, the one end of membrane 1 is fixed in between sample loading head 4 and the sample hood 2 promptly, the other end of membrane 1 is folding again after reaching sample hood 2 bottom and folding along sample hood 2 lateral wall after upwards extending a certain distance along cover membrane protection section of thick bamboo 8 inside wall downwardly extending to cover membrane protection section of thick bamboo 8 bottom by fixed clamping ring 3 on the 8 inside walls of cover membrane protection section of thick bamboo, adopt the rubber membrane in this embodiment.
The advantage of folding the membrane 1 in the above manner is that: 1) the fixing direction before film covering is completely the same as that after film covering, so that the film 1 can be fixed in advance before film covering, and the film 1 does not need to be fixed after film covering; 2) the membrane 1 naturally turns downwards at the position of the sample top cap 2 until the membrane is flush with the lower surface of the sample top cap 2 and then turns upwards, which is equal to turning the inner side of the membrane 1 to expose the inner side, so that an original soil sample 9 is conveniently sleeved; 3) the diameter of the film covering protection cylinder 8 is slightly larger (10mm) than that of the undisturbed soil sample 9, and the film covering protection cylinder can be trumpet-shaped to play a guiding role during downward movement, so that the film 1 is not easy to be punctured by soil particles.
Further, the membrane 1 and the sample top cap 2 are bonded through a bonding material such as liquid rubber, so that the separation interface between the membrane 1 and the sample top cap 2 is prevented from being generated under the action of underground water buoyancy in the descending process of the automatic membrane sleeving device before the sampling depth is reached.
Furthermore, the folded interface of the membrane 1 should be coated with a semi-solid lubricant, such as vaseline or butter, to avoid excessive friction or adhesion between the folded interfaces of the membrane 1 under the pressure of the cavity 5, so that the membrane 1 cannot completely move downwards or even be damaged. Semi-solid lubricant is smeared and filled in the folding interface of the membrane 1, and the mud water under the hole can be ensured not to enter between the folding interfaces of the membrane 1 in the cutting and sample preparation process, so that sundries can be prevented from entering and damaging the membrane 1.
The working process of the automatic film covering device is as follows:
1) applying a lubricant, such as vaseline or butter, between the two layers of the film 1;
2) folding membrane 1 according to the mode, the folding mode is for being fixed in between sample hood 2 top and the loading head 4 with 1 one end of membrane, and the 1 other end of membrane is fixed through 1 end fixing clamping ring 3 of membrane, folds down earlier and extends membrane to sample hood 2 bottom, bonds through the bonding thing such as liquid rubber between membrane 1 and sample hood 2, then folds down and extends to membrane cover membrane protection section of thick bamboo 8 bottom after upwards folding membrane 1 and fix through membrane fixing clamping ring 3 on the cover membrane protection section of thick bamboo 8 lateral wall, and the membrane that folds is as shown in fig. 2, and normal position triaxial test appearance is shown in fig. 1 this moment.
3) The in-situ test sample preparation is carried out by using an in-situ triaxial tester, the cutting sample preparation is started after the film covering protection cylinder 8 descends to the specified sample preparation depth, the film 1 descends synchronously along with the film covering protection cylinder 8 to realize 'soil cutting and film covering while' the film covering is carried out, the engineering drawing of the film covering for half a time is shown in figure 3, the film 1 completely covers the soil sample 9 along with the completion of the sample preparation, and the in-situ triaxial test sample preparation is formed as shown in figure 4.
Further, in the cutting and sample preparation process of the film covering protection cylinder 8, when underground water exists in the stratum, the differential pressure sensor 6 is used for measuring the difference value between the air pressure in the cavity 5 and the external water pressure, and the air pressure in the cavity 5 is compensated and adjusted in real time through the pressure compensation air inlet 7, so that the air pressure in the cavity 5 is always equal to or slightly greater than the underground water pressure, and the film 1 folded in advance is not influenced by the buoyancy of the water.
In conclusion, the automatic film covering device for the underwater undisturbed sample in the hole, provided by the invention, can realize film covering while soil cutting so as to protect the undisturbed sample to the maximum extent.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A device for coating a film on an undisturbed soil sample in a drill hole is characterized by comprising a film coating protection cylinder, a pressure compensation air inlet fixed at the top end of the film coating protection cylinder, a differential pressure sensor, a film, a sample loading head and a sample top cap, wherein the differential pressure sensor, the film, the sample loading head and the sample top cap are fixed inside the film coating protection cylinder; the pressure compensation air inlet is arranged at the top end of the film covering protection cylinder and is communicated with the cavity; the differential pressure sensor is provided with two interfaces, the first interface is arranged on the inner side of the top end of the film-covering protective sleeve and used for measuring the pressure in the cavity, one end of the second interface is arranged on the inner side of the top end of the film-covering protective sleeve, and the other end of the second interface is arranged at the bottom of the sample loading head, penetrates through the sample top cap and is communicated with an original state soil sample and used for measuring the pore water pressure in the original state soil sample; one end of the membrane is fixed in between sample loading head and the sample hood, the other end of the membrane is followed earlier the sample hood lateral wall downwardly extending until reaching fold edge behind the sample hood bottom fold again after the sample hood lateral wall upwardly extending one section distance fold edge again the mantle protection section of thick bamboo inside wall downwardly extending to mantle protection section of thick bamboo bottom is fixed by the fixed clamping ring on the mantle protection section of thick bamboo inside wall.
2. The apparatus for coating a undisturbed soil sample in a borehole according to claim 1, wherein when a difference exists between the pressures measured at the first interface and the second interface, a compensation pressure with the magnitude of the difference is applied to the cavity through the pressure compensation air inlet, so that the pressure value in the cavity is balanced with the pore water pressure of the undisturbed soil sample.
3. The apparatus of claim 1, wherein the membrane is bonded to the top cap of the sample by adhesive.
4. The apparatus of claim 3, wherein the adhesive is liquid rubber.
5. The apparatus of claim 2, wherein the membrane is filled with a semi-solid lubricant at the boundary of the folds.
6. The apparatus for casing a undisturbed soil sample in a borehole according to claim 5 wherein said semi-solid lubricant is selected from the group consisting of petrolatum and butter.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664724.1A CN111811871A (en) | 2020-07-10 | 2020-07-10 | Undisturbed soil sample film sleeving device in drilling |
| CN202011496308.1A CN112683578B (en) | 2020-07-10 | 2020-12-17 | Undisturbed soil sample tectorial membrane device in drilling |
| CN202023050921.9U CN214748953U (en) | 2020-07-10 | 2020-12-17 | Underground in-situ soil sample film covering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664724.1A CN111811871A (en) | 2020-07-10 | 2020-07-10 | Undisturbed soil sample film sleeving device in drilling |
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| Publication Number | Publication Date |
|---|---|
| CN111811871A true CN111811871A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010664724.1A Withdrawn CN111811871A (en) | 2020-07-10 | 2020-07-10 | Undisturbed soil sample film sleeving device in drilling |
| CN202023050921.9U Active CN214748953U (en) | 2020-07-10 | 2020-12-17 | Underground in-situ soil sample film covering device |
| CN202011496308.1A Active CN112683578B (en) | 2020-07-10 | 2020-12-17 | Undisturbed soil sample tectorial membrane device in drilling |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023050921.9U Active CN214748953U (en) | 2020-07-10 | 2020-12-17 | Underground in-situ soil sample film covering device |
| CN202011496308.1A Active CN112683578B (en) | 2020-07-10 | 2020-12-17 | Undisturbed soil sample tectorial membrane device in drilling |
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| CN (3) | CN111811871A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777023A (en) * | 2021-10-08 | 2021-12-10 | 中交华南勘察测绘科技有限公司 | Multi-tube sampler-based mud-water interface acoustic testing device and method |
| CN117347237A (en) * | 2023-08-24 | 2024-01-05 | 南京交通职业技术学院 | Flexible wall structure for preventing dirt mud solidification heavy metal infiltration |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811871A (en) * | 2020-07-10 | 2020-10-23 | 清华大学 | Undisturbed soil sample film sleeving device in drilling |
| CN114112509B (en) * | 2021-12-15 | 2022-06-07 | 南京工业大学 | Soil sample membrane loading device for soil-driven triaxial test |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1478418A (en) * | 1976-01-30 | 1977-06-29 | Turret Eng Ltd | Load applaying and measuring piston assembly for use with a triaxial load cell |
| SU874865A1 (en) * | 1979-04-25 | 1981-10-23 | Новосибирский филиал Всесоюзного научно-исследовательского института транспортного строительства | Instrument for investigating physical and mechanical properties of soil |
| JP3210922B2 (en) * | 1992-02-03 | 2001-09-25 | 株式会社東京ソイルリサーチ | Triaxial piping test apparatus and test method for undisturbed samples |
| CN104374625B (en) * | 2014-11-20 | 2018-07-31 | 中国人民解放军后勤工程学院 | A kind of semi-automatic multifunction soil test pressure-like device |
| CN104777016B (en) * | 2015-01-14 | 2017-10-24 | 南京工业大学 | A kind of sludge consolidating sample making apparatus and its application method |
| CN106596179B (en) * | 2017-02-08 | 2023-03-24 | 水利部交通运输部国家能源局南京水利科学研究院 | Working method of sliding film wire cutting type soft soil sampler |
| CN110132701A (en) * | 2019-06-03 | 2019-08-16 | 中国科学院武汉岩土力学研究所 | A kind of side insert three axis soil sample sample preparation device of probe-type and method |
| CN110631859A (en) * | 2019-10-08 | 2019-12-31 | 合肥工业大学 | Undisturbed soil sample preparation device and preparation method for triaxial compression test |
| CN111811871A (en) * | 2020-07-10 | 2020-10-23 | 清华大学 | Undisturbed soil sample film sleeving device in drilling |
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2020
- 2020-07-10 CN CN202010664724.1A patent/CN111811871A/en not_active Withdrawn
- 2020-12-17 CN CN202023050921.9U patent/CN214748953U/en active Active
- 2020-12-17 CN CN202011496308.1A patent/CN112683578B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113777023A (en) * | 2021-10-08 | 2021-12-10 | 中交华南勘察测绘科技有限公司 | Multi-tube sampler-based mud-water interface acoustic testing device and method |
| CN117347237A (en) * | 2023-08-24 | 2024-01-05 | 南京交通职业技术学院 | Flexible wall structure for preventing dirt mud solidification heavy metal infiltration |
| CN117347237B (en) * | 2023-08-24 | 2024-05-07 | 南京交通职业技术学院 | Flexible wall structure for preventing dirt mud solidification heavy metal infiltration |
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| CN214748953U (en) | 2021-11-16 |
| CN112683578A (en) | 2021-04-20 |
| CN112683578B (en) | 2024-05-28 |
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