CN211652391U - On-spot direct shear test device that can dismantle of soil stone mixture - Google Patents
On-spot direct shear test device that can dismantle of soil stone mixture Download PDFInfo
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- CN211652391U CN211652391U CN201921365250.XU CN201921365250U CN211652391U CN 211652391 U CN211652391 U CN 211652391U CN 201921365250 U CN201921365250 U CN 201921365250U CN 211652391 U CN211652391 U CN 211652391U
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 239000002689 soil Substances 0.000 title claims abstract description 38
- 239000000203 mixture Substances 0.000 title claims abstract description 27
- 239000004575 stone Substances 0.000 title claims abstract description 16
- 238000010008 shearing Methods 0.000 claims abstract description 51
- 238000001514 detection method Methods 0.000 claims abstract 2
- 229910000831 Steel Inorganic materials 0.000 claims description 57
- 239000010959 steel Substances 0.000 claims description 57
- 238000006073 displacement reaction Methods 0.000 claims description 32
- 239000011435 rock Substances 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a direct shear test device can be dismantled on site to soil stone mixture, includes: the bottom of the frame body is erected on the surface of a soil body; the horizontal bearing mechanism is arranged at the bottom of the support frame and comprises a shearing box and a bearing part; the force application unit comprises a vertical force application part and a transverse force application part, wherein the vertical force application part is suspended at the top of the support frame, and the force application end of the vertical force application part is connected with the bearing part and used for providing longitudinal pressure for the shearing box of the horizontal bearing mechanism; the transverse force application part is arranged on the side surface of the support frame, keeps the force application end of the transverse force application part in contact with the box body of the shearing box and is used for providing horizontal shearing force for the shearing box; and a plurality of detection units arranged on the shearing box and/or the bearing part of the horizontal bearing mechanism. The utility model has the advantages that: simple structure, convenient to use can wholly dismantle, portable owing to show numerical value with the sensor, obtains the relevant data of undisturbed normal position soil at the scene, makes the test result more accurate.
Description
Technical Field
The utility model relates to an on-spot direct shear test device, especially in the field of large-scale soil body field test parametric measurement technique.
Background
The direct shear test instrument is divided into an indoor test direct shear instrument and a field test direct shear instrument. The conventional indoor direct shear tester comprises an upper shear box and a lower shear box, wherein a sample is placed in the shear boxes, and then a certain vertical pressure is applied to the top of the sample to push the shear boxes, so that the sample is sheared to be damaged, and the strength parameter of a soil body is obtained. The conventional indoor direct shear apparatus has small size and can only be suitable for fine soil. For part of undisturbed soil-rock mixtures with larger particles, if a conventional indoor direct shear apparatus is adopted to carry out direct shear test, on one hand, because the size of the test apparatus is smaller, the obtained parameters are inaccurate, and the soil-rock mixtures are not suitable for the soil-rock mixtures; on the other hand, when a direct shear test of an undisturbed soil-rock mixture is carried out indoors, a soil sample is extremely easy to disturb and cannot completely reflect the actual state of a field soil body. However, most of the field test direct shear apparatuses have the characteristics of non-detachable whole body, large mass, inconvenient transportation and carrying, non-adjustable size, easy eccentricity of horizontal force, time-consuming consumption of a vertical counter force system or high process requirements and the like.
The test is carried out on the site, which is limited by the test environment, for example, the construction site is not intermittently constructed, and the test can not be carried out at any time and for a long time like an indoor direct shear test instrument, so the designed test instrument is simple and convenient to operate and the time consumed in the process of installing the test instrument is short.
In addition to the two common direct shear test instruments, at present, scholars and engineers at home and abroad develop a plurality of improved direct shear test devices according to different research directions and fields, some shear test instruments are specially processed aiming at special materials, and some shear test instruments are provided with special devices such as a temperature control system, a loading system and a real-time metering system.
Disclosure of Invention
In order to solve the problem, the utility model provides a direct shear test device can be dismantled at soil stone mixture scene, its aim at measures the mechanics parameter of the job site normal position soil body. The test device has the characteristics of convenience in disassembly, simplicity in operation, strong functionality, low cost and the like.
Direct shear test device can be dismantled at soil and stone mixture scene, a serial communication port, include:
the bottom of the frame body is erected on the surface of a soil body;
the horizontal bearing mechanism is arranged at the bottom of the support frame and comprises a shearing box and a bearing part, wherein the shearing box comprises a box body and a shearing box cover plate arranged at the top of the box body, a box cavity of the box body is of an up-and-down cavity structure, and the shearing box cover plate covers the top opening of the box body; the bearing part is paved on the surface of the shear box cover plate and used for transmitting longitudinal pressure to the shear box;
the force application unit comprises a vertical force application part and a transverse force application part, wherein the vertical force application part is suspended at the top of the support frame, and the force application end of the vertical force application part is connected with the bearing part and used for providing longitudinal pressure for the shearing box of the horizontal bearing mechanism; the transverse force application part is arranged on the side surface of the support frame, keeps the force application end of the transverse force application part in contact with the box body of the shearing box and is used for providing horizontal shearing force for the shearing box;
and the detecting units are arranged on the shearing boxes and/or the bearing parts of the horizontal bearing mechanism and are used for detecting the transverse displacement and/or the longitudinal displacement of the horizontal bearing mechanism.
The support frame comprises a bottom plate, a top plate and a steel pipe, the upper part of the steel pipe is detachably connected with the top plate, the lower end of the steel pipe is detachably connected with the bottom plate, and the top plate and the bottom plate are kept horizontal; the lower end face of the top plate is fixed through two connecting steel pipes which are distributed along the diagonal line.
The anti-toppling device is characterized in that an anti-toppling component is additionally arranged between the lower end of the steel pipe and the bottom plate and comprises a fixing ring and a fixing steel bar, wherein the bottom of the fixing steel bar is fixedly connected with the bottom plate, and the top of the fixing steel bar is connected with the fixing ring sleeved on the lower portion of the steel pipe and used for reinforcing the connection between the bottom plate and the steel pipe and preventing the steel pipe from toppling over.
The bearing part comprises a bearing plate and balls, and the bearing plate is laid on the top surface of the shear box cover plate and used for uniformly transmitting the pressure of the vertical force application part to the top surface of the shear box cover plate; the ball sets up in the recess between bearing plate and shear box lid board top surface for reduce the friction between shear box apron and the last bearing plate when carrying out the horizontal shear.
The displacement meter comprises a vertical displacement meter and an upper shear box displacement meter, wherein the vertical displacement meter is arranged on a force application end of the vertical force application part or the bearing plate and is used for detecting the longitudinal displacement of the force application end of the vertical force application part; the upper shearing box displacement meter is arranged on the shearing box cover plate and used for detecting the transverse displacement of the shearing box body.
The bottom of the box body is provided with a cutting ring which is used for being inserted into the soil body and cutting the soil body.
The side wall of the box body is embedded with permeable stones for discharging water in the soil sample in the cavity.
The vertical force application part is a vertical jack, and the horizontal force application part is a horizontal hydraulic jack.
Two notches are arranged on the side edge of the cutting box, and a permeable stone is placed in the notches.
According to the utility model discloses a processing method of direct shear test device can be dismantled on earth and stone mixture scene, a serial communication port, including following step:
1) inserting a cutting ring at the bottom of the box body into the soil body, when the cutting ring is completely inserted into the soil body, then excavating the soil body outside the cutting ring, namely shearing the soil body outside the box, and then installing the whole test instrument device;
2) setting the force value of the vertical force application part, closing the bottom plate, solidifying and reading the data of the vertical displacement meter;
3) after consolidation is finished, shearing is started, the L-shaped steel and the transverse force application part are fixed, the bottom plate is opened, force is applied to the transverse force application part for shearing, and then a transverse force application value and a reading of a corresponding horizontal displacement meter are read;
4) carrying out a plurality of 3 tests with different vertical forces;
5) and establishing a coordinate system by taking the vertical force as an abscissa and the transverse force value as an ordinate. Marking the vertical force value and the maximum transverse force application value of each test on the coordinate system, drawing a straight line by adopting a least square method according to the obtained test result, wherein the intersection point of the straight line and the vertical coordinate is the cohesive force value of the soil-rock mixture, and the inclination angle of the straight line is the internal friction angle of the soil-rock mixture.
The utility model has the advantages that:
(1) simple structure, convenient to use, it is small, can wholly dismantle, portable, safe and reliable to have wholly can dismantle, convenient to carry wide characteristics of application range.
(2) The utility model discloses a 4 steel pipes of staight scissors main part device and upside steel sheet can be dismantled through the nut, go up jack and horizontal jack and also can dismantle, also can dismantle through the nut between main part steel sheet and the steel pipe, carry the transfer convenience after dismantling.
(3) The test instrument has low operation difficulty, can be operated by field constructors, and can obtain reliable data.
(4) The test measuring method provides on-site large shear test equipment suitable for testing real and reliable shear strength parameters of an undisturbed soil-rock mixture, the test result can reflect the strength characteristics of the on-site undisturbed soil-rock mixture, and the test data is more authentic.
(5) The testing device can measure soil parameters at different positions and different depths, and the obtained test data volume is large.
(6) The required economic cost of this testing arrangement is lower.
Drawings
Fig. 1 is the schematic diagram of the utility model of the soil body process is cut into with the cutting ring for the test instrument.
Fig. 2 is the schematic diagram of the testing instrument after the cutting ring cuts into the soil body.
Fig. 3 is a front view of the testing instrument of the present invention.
Fig. 4 is a left side view of the structural schematic diagram of the testing apparatus of the present invention.
Fig. 5 is a schematic top view of the testing apparatus of the present invention.
FIG. 6 is a schematic diagram of the structure of the test apparatus of the present invention (wherein a is a front view of the shear box, b is a front view of the shear box, c is a structural diagram of the bottom plate, d is a structural diagram of the shear box, and e is a side view of the shear box).
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
With reference to the accompanying drawings:
embodiment 1 a direct shear test device can be dismantled on earth and stone mixture scene, include:
the bottom of the frame body is erected on the surface of a soil body;
the horizontal bearing mechanism is arranged at the bottom of the support frame and comprises a shearing box and a bearing part, wherein the shearing box comprises a box body 10 and a shearing box cover plate 9 arranged at the top of the box body, a box cavity of the box body is of an up-and-down through cavity structure, and the shearing box cover plate covers the opening at the top of the box body; the bearing part is paved on the surface of the shear box cover plate and used for transmitting longitudinal pressure to the shear box;
the force application unit comprises a vertical force application part 4 and a transverse force application part 11, wherein the vertical force application part is suspended at the top of the support frame, and the force application end of the vertical force application part 4 is connected with the bearing part and used for providing longitudinal pressure for the shearing box of the horizontal bearing mechanism; the transverse force application part is arranged on the side surface of the support frame, keeps the force application end of the transverse force application part in contact with the box body of the shearing box and is used for providing horizontal shearing force for the shearing box;
and the detecting units are arranged on the shearing boxes and/or the bearing parts of the horizontal bearing mechanism and are used for detecting the transverse displacement and/or the longitudinal displacement of the horizontal bearing mechanism.
The support frame comprises a bottom plate 14, a top plate 3 and a steel pipe 1, wherein the upper part of the steel pipe 1 is detachably connected with the top plate, the lower end of the steel pipe is detachably connected with the bottom plate, and the top plate and the bottom plate are kept horizontal; the lower end face of the top plate is fixed through two connecting steel pipes which are distributed along the diagonal line.
The anti-toppling device is characterized in that an anti-toppling part is additionally arranged between the lower end of the steel pipe 1 and the bottom plate 14 and comprises a fixing ring and a fixing steel bar, wherein the bottom of the fixing steel bar is fixedly connected with the bottom plate, and the top of the fixing steel bar is connected with the fixing ring sleeved on the lower portion of the steel pipe in a sleeved mode and used for reinforcing the connection between the bottom plate and the steel pipe and preventing the steel pipe from toppling over.
The bearing part comprises a bearing plate 7 and balls 8, and the bearing plate 7 is laid on the top surface of the shear box cover plate and used for uniformly transmitting the pressure of the vertical force application part to the top surface of the shear box cover plate; the ball sets up in the recess between bearing plate and shear box lid board top surface for reduce the friction between shear box apron and the last bearing plate when carrying out the horizontal shear.
The displacement meter comprises a vertical displacement meter 5 and an upper shear box displacement meter 6, wherein the vertical displacement meter 5 is arranged on a force application end of the vertical force application part or a bearing plate and is used for detecting the longitudinal displacement of the force application end of the vertical force application part; the upper shearing box displacement meter is arranged on the shearing box cover plate and used for detecting the transverse displacement of the shearing box body.
The bottom of the box body 10 is provided with a cutting ring for inserting into the soil body and cutting the soil body.
The side wall of the box body 10 is embedded with a permeable stone 17 for discharging the moisture in the soil sample in the cavity.
The vertical force application part is a vertical jack, and the horizontal force application part is a horizontal hydraulic jack.
Two notches are arranged on the side edge of the cutting box, and a permeable stone is placed in the notches.
Example 2 in this example: the steel pipes are totally 4 and can be detached. 4 steel pipes and bottom plate are firmly lived through upper and lower nut, fuse into an organic whole. And the lower end part of each steel pipe is fixed with the bottom plate through an anti-toppling part, wherein the anti-toppling part comprises a fixing ring and 4 fixing steel bars, the bottoms of the fixing steel bars are fixedly connected with the bottom plate, and the tops of the fixing steel bars are connected with the fixing ring sleeved at the lower part of the steel pipe, so that the steel pipes are prevented from toppling while the connection between the bottom plate and the steel pipes is reinforced.
The upper side and the lower side between the top plate 3 and the 4 steel pipes are respectively stabilized through the first screw caps 2.
The lower end face of the top plate 3 is fixed by two connecting steel pipes 20 through a diagonal line.
The top plate 3 is connected with the vertical force application part 4 through a rigid bolt and can be detached.
And the vertical force application part is also connected with the bearing plate above the shearing box through a rigid bolt. And a displacement meter is arranged on the bearing plate to measure vertical displacement.
A groove 19 is arranged between the bearing plate above the shearing box and is connected with the bearing plate through a ball.
The shear box cover on the shear box is placed inside the shear box.
Two notches are arranged on the side edge of the cutting box, and a permeable stone is placed in the notches.
The side of the contact part of the shearing box and the bottom plate, which is back to the horizontal hydraulic jack, the bottom plate in contact with the soil body is partially foldable, and the bolt 18 is welded on the bottom plate and is foldable.
A mounting steel plate 12 arranged in the vertical direction is welded on the bottom plate 14, L-shaped steel 13 is welded on the outer side of the mounting steel plate, a horizontal hydraulic jack is fixedly mounted on the inner side of the mounting steel plate, and the telescopic end of the horizontal hydraulic jack props against the outer wall of the box body.
L-shaped steel is welded on the back side of the steel plate which is contacted with the horizontal jack, and the L-shaped steel is welded on the bottom plate 14.
Embodiment 3 according to the utility model discloses a processing method of direct shear test device can be dismantled on earth and stone mixture scene, its characterized in that includes following step:
1) inserting a cutting ring at the bottom of the box body into the soil body, when the cutting ring is completely inserted into the soil body, then excavating the soil body outside the cutting ring, namely shearing the soil body outside the box, and then installing the whole test instrument device;
2) setting the force value of the vertical force application part, closing the bottom plate, solidifying and reading the data of the vertical displacement meter;
3) after consolidation is finished, shearing is started, the L-shaped steel and the transverse force application part are fixed, the bottom plate is opened, force is applied to the transverse force application part for shearing, and then a transverse force application value and a reading of a corresponding horizontal displacement meter are read;
4) carrying out a plurality of 3 tests with different vertical forces;
5) and establishing a coordinate system by taking the vertical force as an abscissa and the transverse force value as an ordinate. Marking the vertical force value and the maximum transverse force application value of each test on the coordinate system, drawing a straight line by adopting a least square method according to the obtained test result, wherein the intersection point of the straight line and the vertical coordinate is the cohesive force value of the soil-rock mixture, and the inclination angle of the straight line is the internal friction angle of the soil-rock mixture.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention includes equivalent technical means that can be conceived by those skilled in the art based on the inventive concepts.
Claims (9)
1. The utility model provides a direct shear test device can be dismantled on site to soil stone mixture, its characterized in that includes:
the bottom of the frame body is erected on the surface of a soil body;
the horizontal bearing mechanism is arranged at the bottom of the support frame and comprises a shearing box and a bearing part, wherein the shearing box comprises a box body and a shearing box cover plate arranged at the top of the box body, a box cavity of the box body is of an up-and-down cavity structure, and the shearing box cover plate covers the top opening of the box body; the bearing part is paved on the surface of the shear box cover plate and used for transmitting longitudinal pressure to the shear box;
the force application unit comprises a vertical force application part and a transverse force application part, wherein the vertical force application part is suspended at the top of the support frame, and the force application end of the vertical force application part is connected with the bearing part and used for providing longitudinal pressure for the shearing box of the horizontal bearing mechanism; the transverse force application part is arranged on the side surface of the support frame, keeps the force application end of the transverse force application part in contact with the box body of the shearing box and is used for providing horizontal shearing force for the shearing box;
and the detecting units are arranged on the shearing boxes and/or the bearing parts of the horizontal bearing mechanism and are used for detecting the transverse displacement and/or the longitudinal displacement of the horizontal bearing mechanism.
2. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 1, wherein: the support frame comprises a bottom plate, a top plate and a steel pipe, the upper part of the steel pipe is detachably connected with the top plate, the lower end of the steel pipe is detachably connected with the bottom plate, and the top plate and the bottom plate are kept horizontal; the lower end face of the top plate is fixed through two connecting steel pipes which are distributed along the diagonal line.
3. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 2, wherein: the anti-toppling device is characterized in that an anti-toppling component is additionally arranged between the lower end of the steel pipe and the bottom plate and comprises a fixing ring and a fixing steel bar, wherein the bottom of the fixing steel bar is fixedly connected with the bottom plate, and the top of the fixing steel bar is connected with the fixing ring sleeved on the lower portion of the steel pipe and used for reinforcing the connection between the bottom plate and the steel pipe and preventing the steel pipe from toppling over.
4. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 1, wherein: the bearing part comprises a bearing plate and balls, and the bearing plate is laid on the top surface of the shear box cover plate and used for uniformly transmitting the pressure of the vertical force application part to the top surface of the shear box cover plate; the ball sets up in the recess between bearing plate and shear box lid board top surface for reduce the friction between shear box apron and the last bearing plate when carrying out the horizontal shear.
5. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 1, wherein: the detection unit comprises a vertical displacement meter and an upper shear box displacement meter, wherein the vertical displacement meter is arranged on a force application end of the vertical force application part or the bearing plate and is used for detecting the longitudinal displacement of the force application end of the vertical force application part; the upper shearing box displacement meter is arranged on the shearing box cover plate and used for detecting the transverse displacement of the shearing box body.
6. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 1, wherein: the bottom of the box body is provided with a cutting ring which is used for being inserted into the soil body and cutting the soil body.
7. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 6, wherein: the side wall of the box body is embedded with permeable stones for discharging moisture in the soil sample in the containing cavity.
8. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 1, wherein: the vertical force application part is a vertical jack, and the horizontal force application part is a horizontal hydraulic jack.
9. The on-site detachable direct shear test device for the soil-rock mixture body as claimed in claim 2, wherein: two notches are arranged on the side edge of the cutting box, and a permeable stone is placed in the notches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921365250.XU CN211652391U (en) | 2019-08-21 | 2019-08-21 | On-spot direct shear test device that can dismantle of soil stone mixture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921365250.XU CN211652391U (en) | 2019-08-21 | 2019-08-21 | On-spot direct shear test device that can dismantle of soil stone mixture |
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| Publication Number | Publication Date |
|---|---|
| CN211652391U true CN211652391U (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921365250.XU Active CN211652391U (en) | 2019-08-21 | 2019-08-21 | On-spot direct shear test device that can dismantle of soil stone mixture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441165A (en) * | 2019-08-21 | 2019-11-12 | 浙江工业大学 | A kind of soil-rock mixture live detachably direct shear test device and processing method |
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2019
- 2019-08-21 CN CN201921365250.XU patent/CN211652391U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441165A (en) * | 2019-08-21 | 2019-11-12 | 浙江工业大学 | A kind of soil-rock mixture live detachably direct shear test device and processing method |
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