CN203745228U - Sampling tube for taking undisturbed soil sample from soft soil - Google Patents
Sampling tube for taking undisturbed soil sample from soft soil Download PDFInfo
- Publication number
- CN203745228U CN203745228U CN201420026482.3U CN201420026482U CN203745228U CN 203745228 U CN203745228 U CN 203745228U CN 201420026482 U CN201420026482 U CN 201420026482U CN 203745228 U CN203745228 U CN 203745228U
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- soil
- pipe
- sample
- sampling
- earth
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- 239000002689 soil Substances 0.000 title claims abstract description 58
- 238000005070 sampling Methods 0.000 title abstract description 13
- 230000007704 transition Effects 0.000 claims abstract description 12
- 230000008859 change Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 23
- 238000002360 preparation method Methods 0.000 description 10
- 230000035699 permeability Effects 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a sampling tube for taking an undisturbed soil sample from soft soil. The sampling tube comprises more than two soil taking tubes, a transition connecting piece, a tube boot and more than one connecting ring, wherein the soil taking tubes are in threaded connection through the connecting rings; the tube boot is in threaded connection with the soil taking tubes through the connecting rings; the transition connecting piece is in threaded connection with the soil taking tubes through the connecting rings and is arranged at one end opposite to the tube boot. By adopting the sampling tube, the sampling quality of undisturbed soil can be relatively well ensured, friction of sampling tube walls, disturbance caused when soil is pushed in the sampling process, and radial unloading influence are reduced, the defect that the sample needs to be withdrawn in a conventional sampling process is overcome, and not only is inconvenience in operation avoided, but also unexpected radial loading caused by sample withdrawing in the sampling process is directly reduced. When the sampling tube is used, secondary disturbance and damage in the sampling process can be greatly reduced, the standardized operation process is facilitated, and good engineering application values are achieved.
Description
Technical field
The utility model relates to a kind of for get stopple coupon and the using method thereof of undisturbed soil sample at weak soil, belongs to the undisturbed collection of Geotechnical Engineering ground and Experimental Method in Laboratory field.
Background technology
Along with the quick propelling of engineering construction, in the prospective design in Geotechnical Engineering field, rationally determining and choosing but of the original position state to Geotechnical Parameter slightly shows and lags behind.Especially the understanding of weak soil more needs further research, with reference to Code for investigation of geotechnical engineering, is more than or equal to 1.0 for natural void ratio, and the fine grained soil that natural moisture content is greater than liquid limit should not be decided to be soft scholar, comprises mud, Muddy Bottoms scholar, peat, cumulosol etc.It has the undesirable features such as weak structure, easy perturbation, high void ratio, high-compressibility, high-moisture percentage, low-intensity conventionally, totally unfavorable to engineering construction.A lot of scholars recognize the importance to the test of Geotechnical Engineering situ, comprise Structure of Soft Clay.But mostly exist disturbance to destroy that it is structural, sample preparation is originally experienced in sampling, the impact of manual operation factor is also larger, in acquired undisturbed sample preparation, also wants careful operation, reduces disturbance and deviation that sample preparation produces.Thereby obtain low disturbance, high-quality ground sample has important realistic meaning to scientific research from now on and engineering construction.
Though existing more soil sample barrel can meet engineering application substantially, also has many deficiencies.Such as, the pipeline section outer wall total length that fetches earth contacts with borehole wall and produces friction obstruction, needs more injection pressure; The soil zone fetching earth in pipe needs to exit through moving back sample equipment or utensil after going back to laboratory, and not only troublesome poeration is moved back during sample in further sample preparation, returns soil sample and brings unnecessary disturbance and radially off-load; Secondly in the time moving back sample, can be just that soil sample is released owing to will overcoming very large resistance, cause unavoidably local densification, soil sample soil body particle permutations, hole compression, constructive variations, cause the variability of sample to increase, and change of properties, produces more cumulative errors.The routine that can reduce the utility model the fetch earth full surface area of tube wall and soil layer friction around, each section after assembled can be sample preparation stage minimizing Secondary Disturbance.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of minimizing high liquid limit, weak structure weak soil sample preparation disturbance, reduces artificial factors, reduces Secondary Disturbance and secondary damage, the stopple coupon of getting undisturbed soil sample in weak soil of simple operation.
The stopple coupon that the utility model is got undisturbed soil sample in weak soil comprises plural pipe 1, transition piece 2, shoe 3, the more than one abutment ring 4 of fetching earth, wherein fetch earth and be threaded by abutment ring 4 between pipe 1, shoe 31 is threaded with the pipe that fetches earth by abutment ring 4, and transition piece 2 is connected with the pipe thread that fetches earth by abutment ring 4 and is arranged on the one end with respect to shoe 3.
Described end of fetching earth pipe 1 is provided with breach 5, and the central angle 90 of breach 5 is spent, and the internal diameter of the pipe that fetches earth is 75-115mm; The height of pipe of fetching earth can be set to 5cm, 10cm, 15cm, and the number of the pipe that fetches earth is determined by actual requirement.
On described abutment ring 4, have seam, the central angle 90 of seam place secant is spent.
The right part wall thickness of described shoe 3 is by 2mm gradual change to 0.3mm, and the sword pin gradient is no more than 15 degree, and the one end being connected with the pipe that fetches earth is provided with breach.
When assembling, according to the required buried depth of test, the each section of pipe that fetches earth is installed, the breach of two adjacent pipes that fetch earth 5 is alignd, then be fixedly connected with abutment ring, leakproofness is good, and after outwarding winding, the pipe breach that fetches earth overlaps just with the seam on abutment ring, can make the two adjacent pipes that fetch earth separate with the sharp soil body of cutting in native cutter cutting breach, less to the damage of soil sample.
The utility model compared with prior art has the following advantages:
1, auxiliary without indoor sample equipment or the utensil of moving back, be conducive to reduce the secondary damage in sample preparation, easy and simple to handle.
2, stopple coupon outer wall and borehole wall contact area are little, are kept to the friction of abutment ring surface area by the full surface area friction of routine, can reduce hole wall damage, reduce the loss of useful work.
3, test sample used and directly in specific tube wall, cut soil by the native cutting ring of cutting of correspondence (as being highly 2cm or 4cm), can not cause radially Influence for Unloading sample quality, and size easily ensures.
4, above-mentioned stopple coupon is assembled with more piece tube wall, can be according to test specimen size quantity body sampling, according to the height of required test sample corresponding tube wall is installed, the test sample degree of depth is accurate.
Brief description of the drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is fetch earth pipe, shoe structural representation of the utility model;
In figure: 1-fetch earth pipe, 2-transition piece, 3-shoe, 4-abutment ring, 5 breach, 6-seam.
Embodiment
Embodiment 1: the stopple coupon that the utility model is got undisturbed soil sample in weak soil has 5 pipes 1 that fetch earth, 6 abutment rings 4,1 transition piece 2, shoe 3, wherein fetch earth and be threaded by abutment ring 4 between pipe 1, shoe 31 is threaded with the pipe that fetches earth by abutment ring 4, and transition piece 2 is connected with the pipe thread that fetches earth by abutment ring 4 and is arranged on the one end with respect to shoe 3; Described end of fetching earth pipe 1 is provided with symmetric windows 5, and the central angle 90 of breach 5 is spent, and the internal diameter of the pipe that fetches earth is 75mm; The height 5cm of pipe fetches earth; On described abutment ring 4, have seam, the central angle 90 of seam place secant is spent; Shoe 3 right part wall thickness are by 2mm gradual change to 0.3mm, and the sword pin gradient is 10 degree, and the one end being connected with the pipe that fetches earth is provided with breach (seeing Fig. 1-2).
After having assembled, can sample shallow-layer bottom, also can be by equipment such as geology brills to deep soil sampler body.After collected specimens completes, it is carried out to soil sample description, Seal and preservation and the safe laboratory that is transported to.Be rotatably connected piecemeal and encircle 4, in the time that the seam of abutment ring 4 overlaps with the breach fetching earth on pipe 1, with the sharp seam of native cutter through fetch earth pipe breach and abutment ring of cutting that scribbles drag reducer, after complete cutting one circle, two adjacent soil sample sections separation.Can obviously reduce like this disturbance of soil sample end, ensure good original state.Then directly in the pipe that fetches earth of throwing off, cut soil sample with cutting ring, cutting ring can be any cutting ring in laboratory, as the consolidation test cutting ring of permeability test cutting ring, 30cm2 or 50cm2, direct shear test cutting ring.After cutting rear leveling two ends, wiped clean, can carry out correlation test, whole process without move back indigenous equipment or utensil, simple to operate, be subject to external interference factor few.
To permeability test, specimen height requires 4cm, thereby selects the high stopple coupon for 5cm specification to assemble.At the high pipe that fetches earth of design experiment point corresponding position assembling 5cm, after fetching earth, carry out sample preparation, the ring that is rotatably connected, in the time that connection circumferential weld overlaps with the pipe breach that fetches earth, cuts one week through breach with cutting native cutter, and adjacent two sections of pipes that fetch earth are separated.Be pressed into high the fetching earth after pipe of above-mentioned 5cm by testing regulations with the high permeability test cutting ring of the 4cm that scribbles drag reducer, the remaining soil of loosening periphery, can carry out a permeability test after taking out cutting ring soil sample leveling two ends.If the 10cm high pipe that fetches earth is installed, operate the samely, with 2 high permeability test cutting rings of 4cm, be pressed into from the fetch earth two ends of pipe of this section simultaneously, become flexible soil more than periphery and can take out 2 permeability test soil samples.
Embodiment 2: the stopple coupon that the utility model is got undisturbed soil sample in weak soil has 4 pipes 1 that fetch earth, 5 abutment rings 4,1 transition piece 2, shoe 3, wherein fetch earth and be threaded by abutment ring 4 between pipe 1, shoe 31 is threaded with the pipe that fetches earth by abutment ring 4, and transition piece 2 is connected with the pipe thread that fetches earth by abutment ring 4 and is arranged on the one end with respect to shoe 3; Described end of fetching earth pipe 1 is provided with symmetric windows 5, and the central angle 90 of breach 5 is spent, and the internal diameter of the pipe that fetches earth is 100mm; The height 5cm of pipe fetches earth; On described abutment ring 4, have seam, the central angle 90 of seam place secant is spent; Shoe 3 right part wall thickness are by 2mm gradual change to 0.3mm, and the sword pin gradient is 10 degree.
To consolidation test or direct shear test, specimen height requires 2cm, can select the high stopple coupon for 5cm specification to assemble.At the high pipe that fetches earth of design experiment point corresponding position assembling 5cm, after fetching earth, carry out sample preparation, the ring that is rotatably connected, in the time that abutment ring overlaps with the pipe breach that fetches earth, cuts one week through breach with cutting native cutter, and adjacent two sections of pipes that fetch earth are separated.With the 2cm cutting ring that scribbles drag reducer, be pressed into high the fetching earth after pipe of above-mentioned 5cm by testing regulations, be pressed into cutting ring from the fetch earth two ends of pipe of this section simultaneously, the remaining soil of loosening periphery can take out 2 soil samples.
Embodiment 3: the stopple coupon that the utility model is got undisturbed soil sample in weak soil has 5 pipes 1 that fetch earth, 6 abutment rings 4,1 transition piece 2, shoe 3, wherein fetch earth and be threaded by abutment ring 4 between pipe 1, shoe 31 is threaded with the pipe that fetches earth by abutment ring 4, and transition piece 2 is connected with the pipe thread that fetches earth by abutment ring 4 and is arranged on the one end with respect to shoe 3; Described end of fetching earth pipe 1 is provided with symmetric windows 5, and the central angle 90 of breach 5 is spent, and the internal diameter of the pipe that fetches earth is 115mm; The height 10cm of pipe fetches earth; On described abutment ring 4, have seam, the central angle 90 of seam place secant is spent; Shoe 3 right part wall thickness are by 2mm gradual change to 0.3mm, and the sword pin gradient is 15 degree.
To triaxial test or unconfined compression strength test, can select the highly stopple coupon for 10cm specification to assemble for φ 3.91cm × 8cm according to specimen size.Assemble the pipe that fetches earth in design experiment point corresponding position, carry out sample preparation after fetching earth, the ring that is rotatably connected, in the time that abutment ring overlaps with the pipe breach that fetches earth, cuts one week through breach with cutting native cutter, and adjacent two sections of pipes that fetch earth are separated.The soil-cutter of, diameter 3.91cm high with the 8cm that scribbles drag reducer, is pressed into high the fetching earth after pipe of above-mentioned 10cm by testing regulations, and the remaining soil of loosening periphery can take out the soil sample of corresponding test.
Claims (4)
1. one kind for getting the stopple coupon of undisturbed soil sample at weak soil, it is characterized in that: it comprises the plural pipe (1) that fetches earth, transition piece (2), shoe (3), more than one abutment ring (4), wherein fetch earth and be threaded by abutment ring (4) between pipe (1), shoe (3) is threaded with the pipe (1) that fetches earth by abutment ring (4), and transition piece (2) is connected with the pipe thread that fetches earth by abutment ring (4) and is arranged on the one end with respect to shoe (3).
2. according to claim 1 for get the stopple coupon of undisturbed soil sample at weak soil, it is characterized in that: the end of the pipe (1) that fetches earth is provided with breach (5), and the central angle 90 of breach (5) is spent, and the internal diameter of the pipe that fetches earth is 75-115mm.
3. according to claim 1 for get the stopple coupon of undisturbed soil sample at weak soil, it is characterized in that: abutment ring has seam on (4), the central angle 90 of seam place secant is spent.
4. according to claim 1 for get the stopple coupon of undisturbed soil sample at weak soil, it is characterized in that: shoe (3) right part wall thickness is by 2mm gradual change to 0.3mm, and the sword pin gradient is no more than 15 degree, the one end being connected with the pipe that fetches earth is provided with breach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420026482.3U CN203745228U (en) | 2014-01-16 | 2014-01-16 | Sampling tube for taking undisturbed soil sample from soft soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420026482.3U CN203745228U (en) | 2014-01-16 | 2014-01-16 | Sampling tube for taking undisturbed soil sample from soft soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203745228U true CN203745228U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420026482.3U Expired - Fee Related CN203745228U (en) | 2014-01-16 | 2014-01-16 | Sampling tube for taking undisturbed soil sample from soft soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203745228U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316348A (en) * | 2014-10-30 | 2015-01-28 | 中交第一航务工程勘察设计院有限公司 | Baffle closed soil sampler |
| CN105758664A (en) * | 2016-04-05 | 2016-07-13 | 广东工业大学 | Size switching sleeve pipe for sampling pipe, mounting tool of size switching sleeve pipe and sampler using mounting tool |
| CN106092809A (en) * | 2015-12-29 | 2016-11-09 | 山东科技大学 | A kind of unsaturated soil suction field measurement apparatus based on filter paper method |
| CN108469402A (en) * | 2018-06-22 | 2018-08-31 | 西南交通大学 | A kind of loosely-packed fluid-structure analysis testing equipment |
| CN111519597A (en) * | 2020-04-16 | 2020-08-11 | 河北益坤岩土工程新技术有限公司 | Soft soil geological exploration method |
-
2014
- 2014-01-16 CN CN201420026482.3U patent/CN203745228U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104316348A (en) * | 2014-10-30 | 2015-01-28 | 中交第一航务工程勘察设计院有限公司 | Baffle closed soil sampler |
| CN106092809A (en) * | 2015-12-29 | 2016-11-09 | 山东科技大学 | A kind of unsaturated soil suction field measurement apparatus based on filter paper method |
| CN105758664A (en) * | 2016-04-05 | 2016-07-13 | 广东工业大学 | Size switching sleeve pipe for sampling pipe, mounting tool of size switching sleeve pipe and sampler using mounting tool |
| CN105758664B (en) * | 2016-04-05 | 2019-04-05 | 广东工业大学 | Size switching casing, its installation tool and the sampler using it of sampling pipe |
| CN108469402A (en) * | 2018-06-22 | 2018-08-31 | 西南交通大学 | A kind of loosely-packed fluid-structure analysis testing equipment |
| CN111519597A (en) * | 2020-04-16 | 2020-08-11 | 河北益坤岩土工程新技术有限公司 | Soft soil geological exploration method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20150116 |
|
| EXPY | Termination of patent right or utility model |