CN211263129U - Portable device for measuring external friction angle between sliding body and ground surface on site - Google Patents
Portable device for measuring external friction angle between sliding body and ground surface on site Download PDFInfo
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- CN211263129U CN211263129U CN201921937997.8U CN201921937997U CN211263129U CN 211263129 U CN211263129 U CN 211263129U CN 201921937997 U CN201921937997 U CN 201921937997U CN 211263129 U CN211263129 U CN 211263129U
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- side plate
- friction angle
- fixedly connected
- ground surface
- shear box
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Abstract
The utility model relates to a device of outer friction angle between portable on-the-spot survey gliding mass and earth's surface, including the shearing box that is used for adorning the soil sample, be used for the pulling to be equipped with the loading system that the shearing box of soil sample moved for the system of measurationing of the outer friction angle of shearing box that is equipped with the soil sample between removal in-process soil sample and the ground, the test device part is few, obtains easily, and it is comparatively convenient to assemble, and each part volume and weight are moderate, are convenient for carry on the car. In the test process, one person can complete the whole test operation without consuming too much manpower. The test principle is simple, and the required external friction angle can be obtained through the measured force data and the displacement.
Description
Technical Field
The utility model relates to a soil body detects technical field, concretely relates to device of outer friction angle between portable on-the-spot survey gliding mass and the earth's surface.
Background
The research on the external friction angle between the sliding body and the ground has important significance for predicting the sliding distance of the landslide. At present, the external friction angle between the sliding body and the ground can be measured through an indoor direct shear test, but in the process of collecting and transporting a soil sample, the indoor direct shear test has too large disturbance to the soil sample, and the deviation of measured test data and actual data is large. In addition, the measurement can also be carried out by an on-site in-situ direct shear apparatus, but the existing direct shear apparatus is complex in assembly and consumes manpower, material resources and financial resources.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a device for measuring the external friction angle between the sliding body and the earth surface on the portable field, which has simple operation and convenient carrying and can accurately measure the external friction angle between the sliding body and the earth surface.
In order to achieve the above object, the present invention provides a portable device for measuring external friction angle between a sliding body and a ground surface on site, which comprises a shearing box for holding a soil sample, a loading system for pulling the shearing box holding the soil sample to move, and a measuring system for detecting the external friction angle between the soil sample and the ground in the moving process of the shearing box holding the soil sample.
The loading system comprises a movable pulley, a fixed support, a fixed pulley, a steel rope, a handle and a loading system, wherein the movable pulley is fixedly connected with one side of the shearing box through a steel wire pull rope, the fixed pulley is movably connected onto the fixed support, the steel rope is wound on the fixed pulley and the movable pulley, the handle is fixedly connected to one side of the fixed pulley and used for rotating the fixed pulley, one end of the steel rope is fixedly connected with the fixed support, and the other end of the steel rope bypasses the movable pulley and is.
The shearing box comprises a right side plate, a left side plate, a front side plate and a rear side plate which are symmetrically arranged, the two ends of the front side plate and the two ends of the rear side plate are respectively inserted into grooves which are formed in the opposite surfaces of the right side plate and the left side plate, the right side plate, the left side plate, the front side plate and the rear side plate are fixedly connected through screw rods connected to the right side plate and the left side plate, a hook is arranged in the middle of the right side plate, and the hook is fixedly connected with a movable pulley and a steel wire rope between the shearing box.
The measuring system comprises a laser range finder arranged on one side of the shearing box close to the loading system and used for detecting the moving distance of the shearing box in the pulling process, a force sensor arranged on a steel wire pull rope between the movable pulley and the shearing box, and the laser range finder and the force sensor are respectively and electrically connected with a notebook computer.
The fixed bolster includes the triangle foot rest that mutual symmetry was equipped with, the anchor board of the triangle foot rest bottom that this symmetry was equipped with of fixed connection, the fixed bolster horizontal pole on the anchor board upper portion of the triangle foot rest bottom that the symmetry was equipped with, the tip fixed connection that the steel cable is connected with the fixed bolster is on this fixed bolster horizontal pole.
The right side plate, the left side plate, the front side plate and the rear side plate are made of light steel plates, and the screw rods are made of a steel nitride material.
The utility model has the advantages that: simple structure, required structure accessory are less, conveniently carry, and the test box is great, but can the split to it is also very convenient to assemble. The loading system is simple to operate, saves labor and saves cost; the shearing box does not need a top cover, so that the disturbance to a soil body can be reduced, and the accuracy of a measuring result is ensured; the combination form of the movable pulley and the fixed pulley is adopted, manual stress application can be performed for testing, loading speed can be controlled manually according to different working conditions, and the most appropriate loading process can be performed according to testing requirements and the properties of a field soil body.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the connection structure between the left/right side plate and the front/rear of the middle shear box of the present invention;
FIG. 3 is a schematic view of the connection structure between the fixed pulley and the fixed pulley according to the present invention;
fig. 4 is a schematic structural view of the movable pulley of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Example 1
As shown in figure 1, the portable device for measuring the external friction angle between the sliding body and the ground surface on site comprises a shear box for containing an earth sample, a loading system for pulling the shear box containing the earth sample to move, and a measuring system for detecting the external friction angle between the earth sample and the ground surface during the movement of the shear box containing the earth sample. The soil sample arranged in the shearing box is placed on the ground and can simulate the sliding body and the ground surface, the loading system can drive the shearing box with the soil sample to move, so that the friction force generated between the soil sample and the ground surface is used for simulating the friction between the sliding body and the ground surface, and the measuring system calculates the external friction angle between the ground surface and the sliding body according to the detected pulling force and displacement.
Wherein, for the convenience of carrying and carrying, the device is detachable, as shown in fig. 1 and fig. 2, the cutting box comprises a right side plate 10 and a left side plate 11, a front side plate 12 and a back side plate 13 which are symmetrically arranged, and two ends of the front side plate 12 and the back side plate 13 are respectively inserted into grooves which are arranged on the opposite surfaces of the right side plate 10 and the left side plate 11, and the right side plate 10, the left side plate 11, the front side plate 12 and the back side plate 13 are fixedly connected through a screw 14 which is connected on the right side plate 10 and the left side plate 11,
the right side plate 10, the left side plate 11, the front side plate 12 and the rear side plate 13 are made of light steel plates, and the screw rods 14 are made of a steel nitride material.
Insert preceding curb plate and posterior lateral plate in the slot in left curb plate and the right side board at the in-process that uses, then through the screw rod with right curb plate 10, left curb plate 11, preceding curb plate 12 and posterior lateral plate 13 fixed connection get up and form the shear box and use, when using the completion back, lift off the screw rod, right curb plate 10, left curb plate 11, preceding curb plate 12 and posterior lateral plate 13 separation conveniently carry and transport.
Because the frictional force between the sliding body and the ground is probably great, so take the power device of assembly pulley, can greatly reduce and draw power, the speed of control shearing that can be easy to and have abundant time to go to record more accurate test data, consequently loading system includes through steel wire stay cord and shearing box one side fixed connection's movable pulley 2, fixed bolster, swing joint fixed pulley 1 on the fixed bolster, the steel cable 3 of winding on fixed pulley 1 and movable pulley 2, fixed connection is used for rotating handle 7 of fixed pulley 1 in fixed pulley 1 one side, the one end and the fixed bolster fixed connection of steel cable 3, the other end is walked around movable pulley 2 and fixed pulley 1 fixed connection.
As shown in fig. 3 and 4, the fixing bracket includes triangular foot rests 5 symmetrically arranged with respect to each other, anchoring plates 4 fixedly connected to bottoms of the triangular foot rests 5 symmetrically arranged, fixing bracket cross bars 6 fixedly connected to upper portions of the anchoring plates 4 at bottoms of the triangular foot rests 5 symmetrically arranged, and end portions of the steel cables 3 connected to the fixing bracket are fixedly connected to the fixing bracket cross bars 6.
The middle part of the right side plate 10 is provided with a hook which is fixedly connected with a steel wire pull rope between the movable pulley 2 and the shearing box.
The cutting box comprises a fixed support, a movable pulley, a fixed handle 7, a fixed pulley, a steel rope, a movable pulley, a hook, a fixed support cross rod 6, a fixed pulley, a movable pulley, a fixed handle and a cutting box, wherein the movable pulley is connected with the hook arranged on the right side plate;
in order to detect the distance of the pulled shearing box and the pulling force, the measuring system comprises a laser range finder 9 arranged on one side of the shearing box close to the loading system and used for detecting the moving distance of the shearing box in the pulling process, a force sensor 8 arranged on a steel wire rope between the movable pulley 2 and the shearing box, and the laser range finder 9 and the force sensor 8 are respectively and electrically connected with a notebook computer 15. The laser range finder 9 and the force sensor 8 send the detected displacement data and force data to the notebook computer. And the notebook computer calculates accurate experimental data according to the received data.
When specifically using, after experimental apparatus equipment is accomplished, the experimenter stimulates the rope, through slowly stirring the fixed pulley, observes the reading change and the displacement size of dynamometry on the computer, takes place obvious descending when the dynamometry reading, perhaps cuts when the box displacement volume reaches the setting value, stops the experiment, according to the experimental data (the reading of dynamometry, the displacement size) that record, through the formula:
wherein τ is the shear strength; f is the reading of the force on the notebook computer; a is the area of the shear box; sigma is the normal stress of the sample acting on the earth surface;
the external friction angle between the sliding body and the ground surface.
The method is characterized in that field selection and cleaning are carried out before experimental operation, soil samples suitable for the size of a shear box to be bulged are manufactured by utilizing tools such as shovels and the like at an experimental point to be tested, and field leveling treatment is carried out in the test advancing direction of the bulged soil body. The fixed pulley support of the loading system is installed, the anchoring is firm, and the fixed pulley is prevented from moving when force is applied.
Since the present invention is a portable device for on-site measurement of the external friction angle between a sliding body and the ground surface, the measured soil body can have a large volume, and since a test box is used to cover the soil sample in the test, the shape of the sample is required to be processed into the shape of a shear box. In the process of shaping the soil sample, marking is carried out by marking, and then a shovel, a small shovel and a soil cutting knife are used for slowly removing redundant soil along a marking line. After the soil body shaping is completed, leveling treatment with the width of 20cm is carried out on the field in the advancing direction of the sample, and preparation is made for experiments. And (3) anchoring a support at the position 2m on the right side of the sample soil body, wherein the support is of a steel structure, and a fixed pulley is arranged at the upper end of the support. The assembly of the entire loading system is shown in fig. 3. After the test preparation work is finished, before the formal test is started, the reading program on the computer needs to be checked and debugged, and accurate test data can be obtained.
The specification and model of the instrument used in the test are respectively as follows: the force sensor is a tension sensor with the measuring range of 0-30 kg. The movable pulley adopts a chrome plating rust-proof U-shaped groove pulley with the diameter of 50mm, the thickness of 22mm and the groove width of 16 mm. The fixed pulley also has a diameter of 50 mm. Steel cord with a cord diameter of 5 mm. The front side plate, the rear side plate, the left side plate and the right side plate used by the shearing box are light steel plates with the thickness of 10 mm. The height × width of the left and right side panels is 100 × 320mm, and the height × width of the front and rear side panels is 100 × 310 mm. The internal space of the assembled shear box is a rectangular body with the length multiplied by the width multiplied by the height multiplied by 300mm multiplied by 100 mm.
The portable device for measuring the external friction angle between the sliding body and the ground surface on site has the advantages of few test device components, easy obtaining, convenient assembly, moderate volume and weight of each component and convenient carrying on a vehicle. In the test process, one person can complete the whole test operation without consuming too much manpower. The test principle is simple, and the required external friction angle can be obtained through the measured force data and the displacement. And the obtained experimental data are accurate, and the soil body performance of the measured area can be truly reflected.
The above embodiments are merely examples of the present invention, and do not limit the protection scope of the present invention, and all designs the same as or similar to the present invention belong to the protection scope of the present invention.
Claims (6)
1. A portable device for measuring an external friction angle between a sliding body and the ground surface on site is characterized by comprising a shear box for containing a soil sample, a loading system for pulling the shear box containing the soil sample to move, and a measuring system for detecting the external friction angle between the soil sample and the ground surface during the movement of the shear box containing the soil sample.
2. The portable device for on-site measuring the external friction angle between the slider and the ground surface according to claim 1, wherein the loading system comprises a movable pulley (2) fixedly connected with one side of the shear box through a steel wire rope, a fixed bracket, a fixed pulley (1) movably connected with the fixed bracket, a steel rope (3) wound on the fixed pulley (1) and the movable pulley (2), a handle (7) fixedly connected with one side of the fixed pulley (1) for rotating the fixed pulley (1), one end of the steel rope (3) is fixedly connected with the fixed bracket, and the other end of the steel rope passes around the movable pulley (2) and is fixedly connected with the fixed pulley (1).
3. The portable device for on-site measurement of the external friction angle between the slider and the ground surface according to claim 2, wherein the shear box comprises a right side plate (10) and a left side plate (11), a front side plate (12) and a rear side plate (13) which are symmetrically arranged, two ends of the front side plate (12) and the rear side plate (13) are respectively inserted into grooves formed in the opposite surfaces of the right side plate (10) and the left side plate (11), the right side plate (10), the left side plate (11), the front side plate (12) and the rear side plate (13) are fixedly connected through a screw (14) connected to the right side plate (10) and the left side plate (11), and a hook is arranged in the middle of the right side plate (10) and fixedly connected with a steel wire rope between the movable pulley (2) and the shear box.
4. The portable device for on-site measuring the external friction angle between the slider and the ground surface according to claim 3, wherein the measuring system comprises a laser distance meter (9) arranged on one side of the shear box close to the loading system for detecting the moving distance of the shear box during the pulling process, a force sensor (8) arranged on the steel wire rope between the movable pulley (2) and the shear box, and the laser distance meter (9) and the force sensor (8) are respectively and electrically connected with the notebook computer (15).
5. The portable device for on-site measuring the external friction angle between the slider and the ground surface according to claim 2, wherein the fixed frame comprises symmetrically arranged triangular brackets (5), anchoring plates (4) fixedly connected to the bottoms of the symmetrically arranged triangular brackets (5), and fixed frame cross rods (6) fixedly connected to the upper parts of the anchoring plates (4) at the bottoms of the symmetrically arranged triangular brackets (5), and the ends of the steel cables (3) connected with the fixed frame are fixedly connected to the fixed frame cross rods (6).
6. A portable on-site friction angle measuring device according to claim 3, wherein the right side plate (10), the left side plate (11), the front side plate (12) and the rear side plate (13) are made of light steel plate, and the screw (14) is made of steel nitride material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921937997.8U CN211263129U (en) | 2019-11-11 | 2019-11-11 | Portable device for measuring external friction angle between sliding body and ground surface on site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921937997.8U CN211263129U (en) | 2019-11-11 | 2019-11-11 | Portable device for measuring external friction angle between sliding body and ground surface on site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211263129U true CN211263129U (en) | 2020-08-14 |
Family
ID=71988269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921937997.8U Expired - Fee Related CN211263129U (en) | 2019-11-11 | 2019-11-11 | Portable device for measuring external friction angle between sliding body and ground surface on site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211263129U (en) |
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2019
- 2019-11-11 CN CN201921937997.8U patent/CN211263129U/en not_active Expired - Fee Related
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| 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: 20200814 Termination date: 20211111 |