CN211697433U - Inverted sample preparation device for measuring adhesion between special curved surface and soil interface - Google Patents
Inverted sample preparation device for measuring adhesion between special curved surface and soil interface Download PDFInfo
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- CN211697433U CN211697433U CN201921473950.0U CN201921473950U CN211697433U CN 211697433 U CN211697433 U CN 211697433U CN 201921473950 U CN201921473950 U CN 201921473950U CN 211697433 U CN211697433 U CN 211697433U
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Abstract
The utility model discloses a system appearance device of special curved surface of inversion system appearance measurement and soil interface adhesion, by test bench, elevating platform, a glass section of thick bamboo, hydrophobic plank, bolt, lateral wall, wiring wooden plug, upper cover plate, the soil body, suspender, rings, and tensiometer constitute jointly, fix a glass section of thick bamboo in hydrophobic plank, fix hydrophobic plank and lateral wall with bolted connection, and invert the glass section of thick bamboo that is fixed well and place in the recess of test bench, support a glass section of thick bamboo with the elevating platform, fill soil and strike solid in layers to the wooden case, fix the upper cover plate and form airtight soil box after the soil body is struck solid; and erecting the soil box, standing for a specific time, opening the bolt, slightly taking out the hydrophobic wood board, separating the glass cylinder from the soil body by using the tension applied by the tension meter, and directly drawing the glass cylinder to measure the adhesion force of the soil body. The inverted sample preparation method can enable the special curved surface to be accurately attached to the soil body to be measured, and is an effective means for researching the influence of direct drawing measurement of the special curved surface on the magnitude of the soil body adhesion force.
Description
Technical Field
The utility model belongs to the technical field of tunnel and underground works test instrument, in particular to invert system appearance and measure system appearance device of special curved surface and soil interface adhesion.
Background
With the increasingly dense population and the increasingly tense traffic conditions of the east cities in China, public traffic systems are at present compelled to be perfect, and more than 20 large and medium-sized cities in China will start subway tunnel construction in the coming years. The excavation of the subway tunnel is carried out in a busy city with dense population, the construction can not be carried out by an open excavation method or a mine method, and the best choice is a shield method. In the shield tunneling process of the shield tunneling machine, due to the influence of various factors such as temperature or soil layers with different properties, under the continuous action of a cutter on a shield cutter head and a soil body on a tunneling surface, a mud cake can be generated on the cutter head of the shield tunneling machine, so that the reduction of the cutting function of the cutter and the eccentric wear are caused, the torque of the cutter head is increased, and the tunneling progress is influenced or even stopped seriously. Therefore, how to accurately measure the soil adhesion is an effective means for solving the problem of mud cake formation on the cutter head.
Currently, there are studies on adhesion measuring devices at home and abroad, such as: in the 50 s of the 20 th century, Foutaine developed a soil adhesion tester using metal disks as a measuring disk in the Investigation of the mechanism of soil adhesion. An SF-1 type soil external adhesion and cohesion tester is developed in the text of 'survey of soil parameters of paddy fields in thirteen Chinese cities' in China by old agriculture machine experts such as Panjun rescue from the late 70 s to the early 80 s. In 1984, the hydro-electric measuring type soil adhesion measuring instrument developed by Susan school of Industrial science, Jiangsu, Zhang Xian et al in hydro-electric measuring type soil adhesion measuring instrument provides a soil adhesion measuring instrument which adopts a hydraulic mechanism and a vertical guide post to continuously press and unload an interface in the vertical direction and adopts a resistance strain gauge cantilever beam type sensor to acquire adhesion data. In 1993, a soil adhesion measuring instrument developed by Yunlun spring et al, Jilin Industrial university in the utility model of "soil adhesion measuring instrument" adopts a combined measuring disc to solve the problem that the real adhesion cannot be measured or cannot be accurately measured when the soil adhesion is greater than the cohesion. In the middle and later period of the 90 s, Jilin university Lushao Fang, Shi Yao Wu et al introduced computer technology into the development of soil adhesion instrument in the article of multifunctional soil laboratory bench, and the automation of the soil adhesion instrument was primarily realized. In 2002, the Wangbushen of Jilin university can realize the measurement of the soil adhesion force under different motion modes such as triangular waves, sine waves and the like by modifying an electronic universal testing machine in the research of the soil adhesion characteristic testing system, and in 2005, the Sulbilk of Jilin university further improves the sampling frequency, the control parameters and the like of the soil adhesion testing system in the research of the sampling frequency and the control parameters of the soil adhesion characteristic testing system. However, the research of these adhesion force measuring devices cannot effectively measure the adhesion force under the influence of the special curved surface, and the situation how to make the special curved surface accurately fit the soil body to be measured is not involved, and the soil body adhesion force cannot be directly tested by pulling the special curved surface. The traditional sample preparation method adopts the mode that objects to be detected such as cones and spheres are directly pressed into the soil, so that large disturbance is generated on the soil body, the soil body is damaged, the contact stress between the soil body and a solid interface is uneven, and the water at the interface is transferred; the influence is more serious for objects with special curved surfaces, even the curved surfaces and soil bodies have large-area separation, the measurement of the adhesion between the special curved surfaces and the soil interfaces is greatly influenced, and the difference from the real adhesion is large.
In order to overcome the defects, the utility model provides an invert system appearance and measure system appearance device of special curved surface and soil interface adhesion, draw through inversion method system appearance and direct special curved surface device, analysis soil body adhesion size to for the prevention and cure of blade disc knot mud cake provide effective analysis foundation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a invert system appearance and measure system appearance device of special curved surface and soil interface adhesion, its aim at can make the accurate laminating of special curved surface soil body that awaits measuring, is convenient for directly draw the influence law of measuring special curved surface to soil body adhesion size, can use among the processing engineering of blade disc knot mud cake.
A sample preparation device for measuring the adhesion force between a special curved surface and a soil interface by inverting a sample preparation comprises a test bed 1, a lifting platform 2, a glass cylinder 3, a hydrophobic wood board 4, a bolt 5, a side wall 6, a wiring wood plug 7, an upper cover plate 8, a soil body 9, a hanging strip 10, a hanging ring 11, a tension meter 12 and a bolt 13, wherein the hydrophobic wood board 4 and the side wall 5 are fixedly connected by the bolt 5, the fixed glass cylinder 3 is inversely arranged in a groove of the test bed 1, the glass cylinder 3 is supported by the lifting platform 2, soil is filled into a wood box and compacted in layers, and the upper cover plate is fixed to form a closed soil box after the soil body 9 is compacted; the soil box is erected and kept stand for a certain time, the hydrophobic wood board 4 is taken out, the glass cylinder 3 is separated from the soil body 9 through the pulling force exerted by the tension meter 12, and the glass cylinder 3 is directly drawn to measure the adhesion force of the soil body. The soil adhesion force under the special curved surface is measured by inverting the sample preparation, so that an analysis basis is provided for removing the cutter disc mud cakes in the actual engineering.
The sample preparation device for measuring the adhesion force between the special curved surface and the soil interface by inverting the sample preparation is characterized in that the hydrophobic wood board 4 is used for temporarily fixing the inverted glass cylinder 3, and the joint of the inverted glass cylinder 3 and the hydrophobic wood board is temporarily fixed by glue; the hydrophobic wood board 4 and the side wall 6 form a temporary inverted soil box through the bolt 5, so that soil 9 can be filled in the soil box in a layered mode and compacted in a layered mode, the soil 9 is filled uniformly, the bottom of the glass cylinder 3 is in good contact, and unnecessary moisture migration at a contact interface is avoided; the hydrophobic wood board 4 is composed of 2 boards, and the middle of the hydrophobic wood board is connected and fixed through 4 symmetrically arranged bolts 13, so that the hydrophobic wood board 4 is prevented from being loosened in the process of impacting the solid soil body 9 in a layering manner.
The sample preparation device for measuring the adhesion force between the special curved surface and the soil interface by inverting the sample preparation is characterized in that a groove is arranged in the middle of a test bed 1, and a lifting platform 2 capable of lifting is arranged in the groove; the lifting platform 2 is used for supporting the inverted glass cylinder 3 and preventing the soil 9 from impacting and dislocating the glass cylinder 3 in the layered compaction process.
The sample preparation device for measuring the adhesion force between the special curved surface and the soil interface by inverting the sample preparation is characterized in that an upper cover plate 8 extrudes a soil body 9 in the process of inverting the sample preparation, a closed soil box is formed by a bolt 5 and a side wall 6, the soil box is inverted up and down to form an upright soil box, and at the moment, the upper cover plate 8 becomes a bottom plate of the soil box.
The sample preparation device for measuring the adhesion force between the special curved surface and the soil interface by inverting the sample preparation is characterized in that 4 hanging holes are symmetrically arranged at the position 2cm away from the top end of the upper part of the glass cylinder 3, and a wiring wooden plug 7 is inserted into each hanging hole.
The sample preparation device for measuring the adhesion force between the special curved surface and the soil interface by inverting the sample preparation is characterized in that a glass cylinder 3 subjected to inverting the sample preparation is placed upright with a closed soil box in an experimental mode, glue between a hydrophobic wood plate 4 and the glass cylinder 3 is scraped, the hydrophobic wood plate 4 is taken out, then the glass cylinder 3 can be subjected to drawing test, and the adhesion force between the bottom surface of the glass cylinder 3 and the soil body 9 is determined.
Advantageous effects
The utility model provides a invert system appearance and measure system appearance device of special curved surface and soil interface adhesion, the device include test bench 1, elevating platform 2, a glass section of thick bamboo 3, hydrophobic plank 4, bolt 5, lateral wall 6, wiring wooden plug 7, upper cover plate 8, the soil body 9, suspender 10, rings 11, tensiometer 12 and bolt 13. The hydrophobic wood board 4 is used for temporarily fixing the inverted glass cylinder 3, and the joint of the two is temporarily fixed by glue; the hydrophobic wood board 4 and the side wall 6 form a temporary inverted soil box through the bolt 5, so that soil 9 can be filled in the soil box in a layered mode and compacted in a layered mode, the soil 9 is filled uniformly, the bottom of the glass cylinder 3 is in good contact, and unnecessary moisture migration at a contact interface is avoided; a groove is arranged in the middle of the test bed 1, and a lifting platform 2 capable of lifting is arranged in the groove; the lifting platform 2 is used for supporting the inverted glass cylinder 3 and preventing the soil body 9 from impacting and dislocating the glass cylinder 3 in the layered compaction process; the upper cover plate 8 extrudes a soil body 9 in the inverted sample preparation process, a closed soil box is formed by the bolt 5 and the side wall 6, the soil box is inverted up and down to form an upright soil box, and the upper cover plate 8 becomes a bottom plate of the soil box; 4 hanging holes are symmetrically formed in the position, 2cm away from the top end, of the upper portion of the glass cylinder 3, and wiring wooden plugs 7 are inserted into the hanging holes. The method for testing the soil adhesion value by directly drawing the device has the following beneficial effects:
1) when the inversion method is adopted for sample preparation, the bottom to be detected and the soil body can be completely attached, the sample preparation method is accurate, and the phenomenon that the soil body and the surface to be detected cannot be completely attached due to direct pressing so that the measurement of the adhesion has errors is avoided.
2) After the inversion sampling is finished, the sample can be directly drawn right up, and the operation is simple and convenient.
3) The adhesion force can be measured on different special curved surfaces by adopting an inversion method, and effective analysis basis is provided for the prevention and control of the mud cakes in the actual engineering by comparing the difference of the adhesion force values under different special curved surfaces.
Drawings
Fig. 1 is a diagram of a sample preparation device for measuring adhesion between a special curved surface and a soil interface by inverting a sample preparation according to the present invention, wherein (a) is a sectional view of the sample preparation device and (b) is a sectional view of a soil sample compaction completion;
FIG. 2 is a cross-sectional view of a direct drawing apparatus;
FIG. 3 is a top view of the hydrophobic wood board 4;
description of reference numerals: the device comprises a test bed 1, a lifting table 2, a glass cylinder 3, a hydrophobic wood board 4, a bolt 5, a side wall 6, a wiring wood plug 7, an upper cover plate 8, a soil body 9, a hanging strip 10, a hanging ring 11, a tension meter 12 and a bolt 13.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
A sample preparation device for measuring the adhesion force between a special curved surface and a soil interface by inverting a sample preparation comprises a test bed 1, a lifting platform 2, a glass cylinder 3, a hydrophobic wood board 4, a bolt 5, a side wall 6, a wiring wood plug 7, an upper cover plate 8, a soil body 9, a hanging strip 10, a hanging ring 11, a tension meter 12 and a bolt 13;
the hydrophobic wood board 4 is used for temporarily fixing the inverted glass cylinder 3, and the joint of the two is temporarily fixed by glue; the hydrophobic wood board 4 and the side wall 6 form a temporary inverted soil box through the bolt 5, so that soil 9 can be filled in the soil box in a layered mode and compacted in a layered mode, the soil 9 is filled uniformly, the bottom of the glass cylinder 3 is in good contact, and unnecessary moisture migration at a contact interface is avoided; the hydrophobic wood board 4 consists of 2 boards, and the middle of the hydrophobic wood board is connected and fixed through 4 symmetrically arranged bolts 13, so that the hydrophobic wood board 4 is prevented from being loosened in the process of impacting the solid soil body 9 in a layering way;
a groove is arranged in the middle of the test bed 1, and a lifting platform 2 capable of lifting is arranged in the groove; the lifting platform 2 is used for supporting the inverted glass cylinder 3 and preventing the soil body 9 from impacting and dislocating the glass cylinder 3 in the layered compaction process;
the upper cover plate 8 extrudes a soil body 9 in the inverted sample preparation process, a closed soil box is formed by the bolt 5 and the side wall 6, the soil box is inverted up and down to form an upright soil box, and the upper cover plate 8 becomes a bottom plate of the soil box;
4 hanging holes are symmetrically formed in the position, 2cm away from the top end, of the upper portion of the glass cylinder 3, and wiring wooden plugs 7 are inserted into the hanging holes.
The utility model discloses the principle and the implementation mode of the utility model are explained by applying the concrete embodiment, and the explanation of the above embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be changes in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (1)
1. A sample preparation device for measuring the adhesion force between a special curved surface and a soil interface by inverting a sample preparation is characterized by consisting of a test bed (1), a lifting table (2), a glass cylinder (3), a hydrophobic wood board (4), a bolt (5), a side wall (6), a wiring wood plug (7), an upper cover plate (8), a soil body (9), a hanging strip (10), a hanging ring (11), a tension meter (12) and a bolt (13);
the hydrophobic wood board (4) is used for temporarily fixing the inverted glass cylinder (3), and the joint of the two is temporarily fixed by glue; the hydrophobic wood board (4) and the side wall (6) form a temporary inverted soil box through the bolt (5), so that soil bodies (9) can be filled in the soil box in a layered mode and compacted in a layered mode, the soil bodies (9) are guaranteed to be filled uniformly, the bottom of the glass cylinder (3) is in good contact, and unnecessary moisture migration at a contact interface is avoided; the hydrophobic wood board (4) consists of 2 boards, and the middle of the hydrophobic wood board is connected and fixed through 4 symmetrically arranged bolts (13), so that the hydrophobic wood board (4) is prevented from being loosened in the process of impacting the solid soil body (9) in a layered manner;
a groove is formed in the middle of the test bed (1), and a lifting table (2) capable of lifting is arranged in the groove; the lifting platform (2) is used for supporting the inverted glass cylinder (3) and preventing the soil body (9) from generating impact dislocation on the glass cylinder (3) in the layered compaction process;
the upper cover plate (8) and the side wall (6) form a closed soil box through the bolt (5), and the soil box is turned upside down to form a positive soil box;
4 hanging holes are symmetrically formed in the position, 2cm away from the top end, of the upper portion of the glass cylinder (3), and wiring wooden plugs (7) are inserted into the hanging holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921473950.0U CN211697433U (en) | 2019-09-02 | 2019-09-02 | Inverted sample preparation device for measuring adhesion between special curved surface and soil interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921473950.0U CN211697433U (en) | 2019-09-02 | 2019-09-02 | Inverted sample preparation device for measuring adhesion between special curved surface and soil interface |
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| CN211697433U true CN211697433U (en) | 2020-10-16 |
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| CN201921473950.0U Active CN211697433U (en) | 2019-09-02 | 2019-09-02 | Inverted sample preparation device for measuring adhesion between special curved surface and soil interface |
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