CN204536105U - A kind of shear box group for original state sandy soil direct shear test - Google Patents
A kind of shear box group for original state sandy soil direct shear test Download PDFInfo
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- CN204536105U CN204536105U CN201520182517.7U CN201520182517U CN204536105U CN 204536105 U CN204536105 U CN 204536105U CN 201520182517 U CN201520182517 U CN 201520182517U CN 204536105 U CN204536105 U CN 204536105U
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- box
- down cut
- cutting ring
- combined type
- shear
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Abstract
The utility model discloses a kind of shear box group for original state sandy soil direct shear test, comprise water storage case, down cut box, lower porous disc, lower filter paper, upper shear box, upper filter paper, upper porous disc and pressure transmission plate from bottom to up, the sidewall bottom of described down cut box has scupper, be characterized in: be provided with base plate in described down cut box, base plate is positioned at below lower porous disc; The inwall of down cut box is close to the bottom of combined type cutting ring, and the inwall of upper shear box is close to the top of combined type cutting ring; The bottom of described combined type cutting ring is identical with top cutter wall thickness, is connected by the fixed pin be embedded in cutter wall; And the bottom of combined type cutting ring and the junction on top flush with the intersection of down cut box and upper shear box; The external diameter of the upper porous disc in described upper shear box is equal with the internal diameter of combined type cutting ring.Adopt this shear box group to carry out the sandy soil preparation of soil sample and shear test, do not destroy the original state character of sandy soil, easy to operate, matching is good, and test findings is more accurate.
Description
Technical field
The utility model relates to a kind of shear box group for original state sandy soil direct shear test, belongs to laboratory soil test field.
Background technology
The instrument that direct shear test (abbreviation direct shear test) adopts is direct shear apparatus, is divided into strain controlling formula and Stress Control formula two kinds, and what current China generally adopted is strain controlling formula direct shear apparatus.Direct shear apparatus is taken into account displacement measurement system formed by shear box, press perpendicular equipment, shearing gearing, dynamometry.Shear box is then formed primarily of upper shear box, down cut box, pressure transmission plate and water storage case.Water storage case is with down cut box, be all connected by fixed pin between down cut box with upper shear box.Down cut box is bottomless, is placed on water storage case and coordinates with its round boss.Sidewall bottom in down cut box has scupper, and the top of scupper is higher than water storage case round boss.
Direct shear test step is as follows: be 1. fixed on water storage case by down cut box, aims at upper and lower shear box, inserts fixed pin, puts into porous disc and filter paper in down cut box; 2. load soil sample, soil sample is placed filter paper and porous disc; 3. make shear box front end just with force gauge contacts, adjustment dynamometer reading is zero, adds pressure transmission plate, increased pressure frame in turn; 4. apply pressure at right angle by press perpendicular equipment, at this moment, the portion of water in soil sample, through porous disc, drains in water storage case by scupper; 5. take out the fixed pin between upper and lower shear box, zeroing dynamometer, applying horizontal thrust by shearing gearing to down cut box, making soil sample produce detrusion on the horizontal contact face of upper and lower shear box, until destroy, record dynamometer reading and displacement vector.
When loading soil sample, the operation of cohesive soil is, direct cutting ring cuts out circular native cake from clay sample, then cutting ring cutting edge is upwards aimed at upper shear box mouth, soil sample puts porous disc, slowly pushed in shear box by native cake.Owing to being very easily disturbed when original state sandy soil samples, when sampling, soil sample easily glides along cutting ring wall, causes soil sample to be missed, and soil sample can not be pushed in shear box when therefore carrying out direct shear test to sandy soil as cohesive soil with cutting ring direct sample.When existing direct shear test is tested sandy soil, often according to height and the density of soil sample control loading sand sample quality of shear box, after hitting real (or compacting) to specified altitude, carry out shear test.Like this, the original traits of sandy soil is interfered, and the stress of soil sample is affected, and finally causes the sand shear strength parameter index that measures inaccurate, can not the original state character of complete reflection sandy soil.
Utility model content
The purpose of this utility model is to provide a kind of shear box group of original state sandy soil direct shear test.Adopt this shear box group to carry out the sandy soil preparation of soil sample and shear test, do not destroy the original state character of sandy soil, easy to operate, matching is good, and test findings is accurate.
The utility model for the technical scheme realizing its goal of the invention and take is: a kind of shear box group for original state sandy soil direct shear test, comprise water storage case, down cut box, lower porous disc, lower filter paper, upper shear box, upper filter paper, upper porous disc, pressure transmission plate from bottom to up, the sidewall bottom of described down cut box has scupper, and its design feature is:
Be provided with base plate in described down cut box, described base plate is positioned at below lower porous disc;
The inwall of described down cut box is close to the bottom of combined type cutting ring, and the inwall of upper shear box is close to the top of combined type cutting ring; The bottom of described combined type cutting ring is identical with top cutter wall thickness, connected, and the bottom of combined type cutting ring and the junction on top flushes with the intersection of down cut box and upper shear box by the fixed pin be embedded in cutter wall;
The external diameter of the upper porous disc in described upper shear box is equal with the internal diameter of combined type cutting ring.
The course of work of the present utility model and principle are:
One, sample, can according to existing original state sand extractor sampling, only change the cutting ring in existing original state sand extractor into combined type cutting ring, the soil sample of getting is arranged in combined type cutting ring, and combined type cutting ring is placed on a cover plate; Also can with the direct sample of combined type cutting ring: separable ring edge side is vertically pressed into the soil body, until sand gives prominence to combined type cutting ring non-blade port side, strike off the soil body higher than combined type cutting ring non-blade port side, then cover cover plate, subsequently, with supporting plate from lower than separable ring edge incision soil sample, hold combined type cutting ring and cover plate, then horizontal of reversing together, remove supporting plate, strike off separable ring edge side soil sample, by soil sample outside the clean combined type cutting ring of hairbrush, namely complete the sampling of original state sandy soil.
Two, dress sample: put down filter paper and lower porous disc on soil sample surface successively, by the down cut box upset bonnet of band base plate in soil sample, makes combined type cutting ring and soil sample enter in down cut box until base plate; By down cut box, combined type cutting ring and in soil sample, cover plate to reverse together horizontal, remove cover plate, namely complete the preparation of shearing soil sample; Down cut box is fixed in water storage case, upper shear box is inserted in combined type cutting ring top, and aims at down cut box, the fixed pin of shear box and down cut box in insertion, then lay down the fixed pin of combined type cutting ring.
Three, test: sand soil sample upper surface place successively filter paper, on porous disc, pressure transmission plate, apply certain pressure at right angle by press perpendicular equipment; Finally take out the fixed pin between upper and lower shear box, zeroing dynamometer, by shearing gearing, horizontal thrust is applied to down cut box, drive combined type cutting ring bottom and soil sample wherein in down cut box, soil sample is made to produce detrusion on the horizontal contact face of upper and lower shear box (upper and lower of combined type cutting ring), until destroy, record dynamometer reading and displacement vector.
Compared with prior art, the beneficial effects of the utility model are:
The utility model is after sampling, the down cut box that combined type cutting ring is directly placed in band base plate need not take out again, band cutting ring can be realized shear in shear test, effectively solve the problem how got original state sand sample enters shear box, whole process of the test continuity is good, each component matching of test unit is good, and the original state sandy soil shear strength parameter index of test determination is comparatively accurate.
Further, the base plate of down cut box described in the utility model is waterproof base plate, and the top of the scupper of the sidewall bottom in described down cut box is higher than the upper surface of base plate.
Like this, when applying pressure at right angle to soil sample, the portion of water in soil sample easily through porous disc, can be drained in water storage case by scupper
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
Accompanying drawing explanation
Fig. 1 be the utility model embodiment one face structural representation.
Fig. 2 is the plan structure schematic diagram of the utility model embodiment one.
Fig. 3 is A-A sectional structure schematic diagram in Fig. 2.
Fig. 4 is the combined type cutting ring plan structure signal in the utility model embodiment one.
Fig. 5 is B-B sectional structure schematic diagram in Fig. 4.
In figure, 11 is the fixed pin between down cut box and water storage case, and 12 is the fixed pin between down cut box and upper shear box, and 13 is the handle that down cut outer box wall is arranged.
Embodiment
Embodiment one
Fig. 1-5 illustrates, a kind of embodiment of the present utility model is: a kind of shear box group for original state sandy soil direct shear test, comprise water storage case 1, down cut box 2, lower porous disc 3, lower filter paper 4, upper shear box 5, upper filter paper 6, upper porous disc 7, pressure transmission plate 8 from bottom to up, the sidewall bottom of described down cut box 2 has scupper 2a, and its design feature is:
Be provided with base plate 2b in described down cut box 2, described base plate 2b is positioned at below lower porous disc 3;
The inwall of described down cut box 2 is close to the bottom 9a of combined type cutting ring 9, and the inwall of upper shear box 5 is close to the top 9b of combined type cutting ring 9; The bottom 9a of described combined type cutting ring 9 is identical with top 9b cutter wall thickness, connected, and the junction of the bottom 9a of combined type cutting ring 9 and top 9b flushes with the intersection of down cut box 2 and upper shear box 5 by the fixed pin 10 be embedded in cutter wall;
The external diameter of the upper porous disc 7 in described upper shear box 5 is equal with the internal diameter of combined type cutting ring 9.
The base plate 2b of the box of down cut described in this example 2 is waterproof base plate, and the top of the scupper 2a of the sample aperture sidewall bottom of described down cut box 2 is higher than the upper surface of base plate 2b.
Embodiment two
A kind of shear box group for original state sandy soil direct shear test, comprise water storage case 1, down cut box 2, lower porous disc 3, lower filter paper 4, upper shear box 5, upper filter paper 6, upper porous disc 7, pressure transmission plate 8 from bottom to up, the sidewall bottom of described down cut box 2 has scupper 2a, and its design feature is:
Be provided with the base plate 2b of porous in described down cut box 2, described base plate 2b is positioned at below lower porous disc 3;
The inwall of described down cut box 2 is close to the bottom 9a of combined type cutting ring 9, and the inwall of upper shear box 5 is close to the top 9b of combined type cutting ring 9; The bottom 9a of described combined type cutting ring 9 is identical with top 9b cutter wall thickness, connected, and the junction of the bottom 9a of combined type cutting ring 9 and top 9b flushes with the intersection of down cut box 2 and upper shear box 5 by the fixed pin 10 be embedded in cutter wall;
The external diameter of the upper porous disc 7 in described upper shear box 5 is equal with the internal diameter of combined type cutting ring 9.
Claims (2)
1. the shear box group for original state sandy soil direct shear test, comprise water storage case (1), down cut box (2), lower porous disc (3), lower filter paper (4), upper shear box (5), upper filter paper (6), upper porous disc (7) and pressure transmission plate (8) from bottom to up, the sidewall bottom of described down cut box (2) has scupper (2a), it is characterized in that:
Be provided with base plate (2b) in described down cut box (2), described base plate (2b) is positioned at lower porous disc (3) below;
The inwall of described down cut box (2) is close to the bottom (9a) of combined type cutting ring (9), and the inwall of upper shear box (5) is close to the top (9b) of combined type cutting ring (9); The bottom (9a) of described combined type cutting ring (9) is identical with top (9b) cutter wall thickness, connected by the fixed pin (10) be embedded in cutter wall, and the junction of the bottom (9a) of combined type cutting ring (9) and top (9b) flushes with the intersection of down cut box (2) and upper shear box (5);
The external diameter of the upper porous disc (7) in described upper shear box (5) is equal with the internal diameter of combined type cutting ring (9).
2. a kind of shear box group for original state sandy soil direct shear test according to claim 1, it is characterized in that: the base plate (2b) of described down cut box (2) is waterproof base plate, the top of the scupper (2a) of the sidewall bottom in described down cut box (2) is higher than the upper surface of base plate (2b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520182517.7U CN204536105U (en) | 2015-03-30 | 2015-03-30 | A kind of shear box group for original state sandy soil direct shear test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520182517.7U CN204536105U (en) | 2015-03-30 | 2015-03-30 | A kind of shear box group for original state sandy soil direct shear test |
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| CN204536105U true CN204536105U (en) | 2015-08-05 |
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| CN201520182517.7U Expired - Fee Related CN204536105U (en) | 2015-03-30 | 2015-03-30 | A kind of shear box group for original state sandy soil direct shear test |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792608A (en) * | 2015-03-30 | 2015-07-22 | 西南交通大学 | Shear box group for direct shear test of undisturbed sandy soil |
| CN106153475A (en) * | 2016-06-22 | 2016-11-23 | 西安科技大学 | The shearing test device of a kind of soil body shear band and shearing test method |
| CN106198255A (en) * | 2016-06-22 | 2016-12-07 | 西安科技大学 | Soil body shearing test device and shearing test method under a kind of confined pressure state |
| CN108871893A (en) * | 2016-04-07 | 2018-11-23 | 三峡大学 | A kind of method that scene Soil Direct Shear test prepares the soil body with soil body preparation device |
| CN109307628A (en) * | 2018-09-29 | 2019-02-05 | 中铁隧道局集团有限公司 | A kind of mud film shear strength test instrument and its method for measuring mud film shearing strength |
| CN113319993A (en) * | 2021-07-01 | 2021-08-31 | 辽宁工程技术大学 | Mold convenient for demolding of low-strength building material test block and use method thereof |
-
2015
- 2015-03-30 CN CN201520182517.7U patent/CN204536105U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104792608A (en) * | 2015-03-30 | 2015-07-22 | 西南交通大学 | Shear box group for direct shear test of undisturbed sandy soil |
| CN108871893A (en) * | 2016-04-07 | 2018-11-23 | 三峡大学 | A kind of method that scene Soil Direct Shear test prepares the soil body with soil body preparation device |
| CN108871893B (en) * | 2016-04-07 | 2021-01-26 | 三峡大学 | Method for preparing soil body by soil body preparation device for on-site soil body direct shear test |
| CN106153475A (en) * | 2016-06-22 | 2016-11-23 | 西安科技大学 | The shearing test device of a kind of soil body shear band and shearing test method |
| CN106198255A (en) * | 2016-06-22 | 2016-12-07 | 西安科技大学 | Soil body shearing test device and shearing test method under a kind of confined pressure state |
| CN106153475B (en) * | 2016-06-22 | 2018-11-06 | 西安科技大学 | A kind of shearing test device and shearing test method of soil body shear band |
| CN106198255B (en) * | 2016-06-22 | 2018-11-06 | 西安科技大学 | Soil body shearing test device and shearing test method under a kind of confining pressure state |
| CN109307628A (en) * | 2018-09-29 | 2019-02-05 | 中铁隧道局集团有限公司 | A kind of mud film shear strength test instrument and its method for measuring mud film shearing strength |
| CN109307628B (en) * | 2018-09-29 | 2024-04-26 | 中铁隧道局集团有限公司 | Mud film shear strength test instrument and mud film shear strength measurement method thereof |
| CN113319993A (en) * | 2021-07-01 | 2021-08-31 | 辽宁工程技术大学 | Mold convenient for demolding of low-strength building material test block and use method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20180330 |