Rapid detection device for testing permeability of soil body in rock-soil mechanics

Abstract

The utility model relates to the field of rock-soil mechanics testing devices, and discloses a rapid detection device for a soil body permeability test in rock-soil mechanics, which comprises a base, a soil body mold is fixedly mounted on the base, and connecting chutes are formed in the left side and the right side of the outer wall surface of the soil body mold; sliding blocks are slidably installed on the outer side face of the soil body mold through connecting sliding grooves, the sliding blocks are distributed at the position close to an upper end opening of the soil body mold, guide pipes are fixedly installed on the two sets of sliding blocks, ejector rods are slidably installed in the guide pipes, and air cylinders are arranged on the bottom faces of the sliding blocks. The annular rubber blocking piece compacted by the gravity pressing block plays a sealing role, water is prevented from permeating from the contact face of the mold cavity and the soil body, in addition, the soil body is tightly attached to the inner wall of the mold cavity by applying confining pressure, the permeating situation of the contact face is further reduced, and therefore interference of external factors on the detection result is reduced, and the detection accuracy is improved. And the detection data can reflect the actual permeability of the soil body more truly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of geotechnical mechanics testing device, especially relate to the quick detection device of soil permeability test in geotechnical mechanics. BACKGROUND

[0002] Geotechnical mechanics test has the vital position in civil engineering, geological exploration, construction engineering and numerous fields. Accurate measurement of the mechanical parameters of soil, such as permeability, plays a decisive role in the design, construction and stability evaluation of engineering.

[0003] Traditional geotechnical permeability detection device and method exist in many forms. In the early stage, part of the detection method is through simple soil sample collection, and water permeation experiment is carried out in the laboratory by using simple container, the permeation speed and path of water in soil sample are observed, so as to estimate the permeability of soil. This method is simple to operate, but due to the difficulty in accurately controlling the experimental conditions, such as the compaction degree of soil sample, boundary conditions, etc., the accuracy and reliability of the detection result is low. With the development of technology, some more complex detection equipment appears, which uses pressure sensor and flow sensor to measure the pressure and flow change of water, so as to calculate the permeability of soil. However, these devices often have some deficiencies in structural design, for example, the sealing performance is poor, which is easy to cause water leakage from the contact surface of soil sample and mold, affecting the precision of detection result.

[0004] Therefore, we propose the quick detection device of soil permeability test in geotechnical mechanics. CONTENT OF UTILITY MODEL

[0005] The utility model mainly solves the above-mentioned technical problem, and provides the quick detection device of soil permeability test in geotechnical mechanics.

[0006] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme, the quick detection device of soil permeability test in geotechnical mechanics, including base, the soil body mold is fixedly installed on the base, the outer wall surface of the soil body mold is provided with the connecting sliding groove on both sides, the outer side of the soil body mold is slidably installed with the sliding block through the connecting sliding groove, the sliding block is distributed at the upper end port position close to the soil body mold, the guide pipe is fixedly installed on two groups of sliding blocks, the top rod is slidably installed in the guide pipe, the bottom surface of the sliding block is provided with the air cylinder, the output end of the air cylinder is fixedly connected with the top rod, the upper end of two groups of top rods is fixedly installed with the lifting plate, the lifting plate is equipped with the gravity pressing block, the position of the gravity pressing block is controlled through the telescopic movement of the air cylinder, the mold cavity is vertically opened downward on the top surface of the soil body mold.

[0007] As preferred, the gravity pressing block is coaxially arranged with the mold cavity by sliding the two groups of sliding blocks to drive the gravity pressing block to move.

[0008] As preferred, the inner wall surface of the mold cavity is fixedly installed with annular rubber baffles, which are distributed near the upper end port position in the mold cavity.

[0009] As preferred, the gravity pressing block is coaxially arranged with the mold cavity by sliding the two groups of sliding blocks to drive the gravity pressing block to move.

[0010] As preferred, the four peripheral side walls of the soil body mold are equidistantly provided with a plurality of detectors from top to bottom.

[0011] Advantages

[0012] The utility model provides a quick detection device of soil body permeability test in geotechnique, has the following advantages:

[0013] The quick detection device of soil body permeability test in geotechnique, when using, first fills and places the soil body into the mold cavity, the inner wall surface of the mold cavity is fixedly installed with annular rubber baffles, the annular rubber baffles are distributed near the upper end port position in the mold cavity, control makes the top surface of the soil body even and is pasted with the bottom surface of the annular rubber baffle, controls the gravity pressing block to press from top to bottom at this time, makes the gravity pressing block distribute into the mold cavity and press on the top surface of the soil body, the annular rubber baffle is distributed between the position of the soil body and the gravity pressing block at this time, after the detection water is injected into the mold cavity and contacts the soil body through the water injection hole, the annular rubber baffle is set to be compacted by the gravity pressing block and plays a sealing role, avoids the penetration of water from the contact surface of the mold cavity and the soil body, in addition, by adding the confining pressure, the soil body is tightly pasted with the inner wall of the mold cavity, further reduces the penetration of the contact surface, thereby reducing the interference of external factors on the detection result, makes the detection data more truly reflect the actual permeability of the soil body, and the detection accuracy of the equipment is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained according to the provided drawings without creating labor.

[0015] The structure, proportion, size and the like disclosed in the specification are merely used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and do not have technical substantive significance, and do not have the function of limiting the implementation of the utility model, any modification of the structure, change of the proportion relationship or adjustment of the size, as long as it does not affect the effect and purpose of the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0016] Figure 1 It is a whole three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is a three-dimensional structure schematic diagram of the soil body mold of the utility model;

[0018] Figure 3 It is a three-dimensional structure schematic diagram of the gravity briquetting of the utility model;

[0019] Figure 4 It is a cross-sectional view of the internal structure of the soil body mold of the utility model.

[0020] Legend:

[0021] 1, base; 2, soil body mold; 3, detector; 4, sliding block; 5, air cylinder; 6, guide pipe; 7, ejector rod; 8, lifting plate; 9, gravity briquetting; 10, mold cavity; 11, water injection hole; 12, annular rubber check piece; 13, soil body; 14, connecting sliding chute. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Embodiment one: a rapid detection device for testing soil body permeability in geotechnical mechanics, refer to Figures 1 to 4, including the base 1, the soil body mold 2 is fixedly installed on the base 1, a plurality of groups of detectors 3 are arranged equidistantly on the four peripheral side wall surfaces of the soil body mold 2 from top to bottom, the outer wall surfaces of the soil body mold 2 are provided with connecting sliding grooves 14 on the left and right sides, the outer side surfaces of the soil body mold 2 are slidably installed with sliding blocks 4 through the connecting sliding grooves 14, the sliding blocks 4 are distributed at the upper end port positions close to the soil body mold 2, guide pipes 6 are fixedly installed on the two groups of sliding blocks 4, top rods 7 are slidably installed in the guide pipes 6, air cylinders 5 are arranged on the bottom surfaces of the sliding blocks 4, the output ends of the air cylinders 5 are fixedly connected with the top rods 7, the upper ends of the two groups of top rods 7 are fixedly installed with a lifting plate 8, the lifting plate 8 is provided with a gravity pressing block 9, the top rods 7 are driven to ascend along the guide pipes 6 through the telescopic movement of the air cylinders 5, thereby controlling the position of the gravity pressing block 9, a mold cavity 10 is vertically downwardly arranged on the top surface of the soil body mold 2, the gravity pressing block 9 is structurally matched with the mold cavity 10, the two groups of sliding blocks 4 are driven to move by sliding the two groups of sliding blocks 4, the gravity pressing block 9 is controlled to be coaxially arranged with the mold cavity 10, at this time, the top rods 7 are driven to move downward by the air cylinders 5, and the top rods 7 are driven to move into the mold cavity 10 along with the gravity pressing block 9;

[0024] Further, the gravity pressing block 9 is provided with a water injection hole 11, in use, the soil body 13 is first filled and placed into the mold cavity 10, the inner wall surface of the mold cavity 10 is fixedly installed with an annular rubber baffle 12, the annular rubber baffle 12 is distributed at the upper end port position close to the inner wall surface of the mold cavity 10, the top surface of the soil body 13 is controlled to be flat and abutted with the bottom surface of the annular rubber baffle 12, at this time, the gravity pressing block 9 is controlled to be pressed from top to bottom, the gravity pressing block 9 is distributed into the mold cavity 10 and pressed on the top surface of the soil body 13, at this time, the annular rubber baffle 12 is distributed at the position between the soil body 13 and the gravity pressing block 9, the detection water is injected into the mold cavity 10 through the water injection hole 11 and contacted with the soil body 13, the permeability of the soil body 13 is detected through the plurality of groups of detectors 3, the annular rubber baffle 12 is sealed by being pressed by the gravity pressing block 9, so that the water is prevented from penetrating from the contact surface between the mold cavity 10 and the soil body 13, on the basis, the surrounding pressure (the surrounding pressure in the triaxial test) is applied, so that the soil body 13 is tightly contacted with the inner wall of the mold cavity 10, the contact surface penetration is reduced, and the equipment detection accuracy is improved.

[0025] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. The skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model, under the premise of not departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall into the scope of the utility model claimed for protection. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A rapid detection device for testing the permeability of soil in geotechnical mechanics, comprising a base (1), a soil mold (2) is fixedly installed on the base (1), characterized in that: The outer wall surface of the soil body mold (2) is provided with connecting sliding grooves (14) on both sides, the outer surface of the soil body mold (2) is slidably installed with sliding blocks (4) through the connecting sliding grooves (14), the sliding blocks (4) are distributed near the upper end port position of the soil body mold (2), guide pipes (6) are fixedly installed on the two groups of sliding blocks (4), top rods (7) are slidably installed in the guide pipes (6), the bottom surface of the sliding block (4) is provided with a pneumatic cylinder (5), the output end of the pneumatic cylinder (5) is fixedly connected with the top rod (7), the upper ends of the two groups of top rods (7) are fixedly installed with a lifting plate (8), the lifting plate (8) is provided with a gravity pressing block (9), and the top surface of the soil body mold (2) is vertically downwardly provided with a mold cavity (10).

2. The rapid detection device for testing soil permeability in geotechnique according to claim 1, characterized in that: The gravity pressing block (9) is matched with the structure of the mold cavity (10), two groups of sliding blocks (4) are slid, the gravity pressing block (9) is driven to move by the two groups of sliding blocks (4), and the gravity pressing block (9) is coaxially arranged with the mold cavity (10).

3. The rapid detection device for testing soil permeability in geotechnique according to claim 1, characterized in that: The inner wall surface of the mold cavity (10) is fixedly installed with an annular rubber baffle (12), and the annular rubber baffle (12) is distributed near the upper end port position in the mold cavity (10).

4. The rapid detection device for testing soil permeability in geotechnique according to claim 1, characterized in that: The gravity pressing block (9) is provided with a water injection hole (11) penetrating therethrough.

5. The rapid detection device for testing soil permeability in geotechnique according to claim 1, characterized in that: A plurality of detectors (3) are equidistantly arranged on the peripheral side wall surface of the soil body mold (2) from top to bottom.

Images