CN203786072U - Indoor test device for measuring soil-water-air deformation aging - Google Patents

Abstract

The utility model relates to an indoor testing device for testing strain aging of soil-water-gas. The device comprises a test sample barrel, wherein a cover plate is arranged on the cover plate and a base is arranged under the cover plate, a pressurizing plate is arranged on the cover plate, the cover plate and the base are respectively provided with electrode sheets I, electrode sheets II are axially arranged on the inner wall of the test sample barrel at intervals, and the electrode sheets I and II are connected with a constant voltage resistor; the electrode sheets I on the cover plate and the base are respectively connected with the constant voltage resistor through leads, and each electrode sheet II penetrates through the wall of the test sample barrel and is connected with the constant voltage resistor through a lead. The device provided by the utility model realizes detection of change condition of resistivity of a soil body along with time and strain, is suitable for exploring the resistivity changing rule of different character soil samples under a loading condition and can be used for researching the evolution law of a three-phase medium of the soil body so as to further explore the long-term deformation effect such as solidification and creep deformation of the soil body, thereby facilitating microscomic rule research of test of the soil body and post-construction settlement rule research in engineering field.

Description

Indoor test device for measuring soil-water-air deformation aging

technical field

The utility model belongs to the technical field of geotechnical engineering test devices, and relates to an indoor test device for measuring the deformation aging of soil-water-air. the

Background technique

The research on soil deformation law is currently mainly focused on macro analysis. For example, in recent years, the loess high filling and high embankment projects such as "ditch filling and land construction" have been widely carried out in Northwest China. The study of the law and its formation mechanism has become an important topic. With the advancement of advanced technology, many research results have been obtained in the study of the mesoscopic deformation law of loess, but the main research results are qualitative indicators such as porosity, anisotropy, particle size, shape and orientation degree of loess. , it is impossible to detect the deformation of the soil under dynamic changing conditions, and the sample preparation and testing process is cumbersome and the cost is too high. the

Utility model content

The purpose of the utility model is to provide an indoor test device for measuring the deformation aging of soil-water-air, which can detect the deformation of soil under dynamic changing conditions. the

The technical scheme of the utility model is that the indoor test device for measuring soil-water-air deformation aging includes a sample cylinder, a cover plate is arranged on the sample cylinder, a base is provided below, a pressure plate is arranged on the cover plate, the cover plate and The base is provided with electrode sheet I respectively, and the inner wall of the sample cylinder is provided with electrode sheet II at intervals along the axial direction, and both electrode sheet I and electrode sheet II are connected to a constant voltage resistance meter. the

The utility model is also characterized in that:

The electrode piece I on the cover plate and the base is respectively connected to the constant voltage resistance meter through wires, and each electrode piece II is connected to a constant voltage resistance meter through a wire passing through the wall of the sample cylinder. the

There are two rows of electrode sheets II, and the two rows of electrode sheets II are arranged symmetrically along the radial direction of the sample cylinder. the

Drainage holes are respectively arranged on the cover plate and the base. the

The sample cylinder, cover plate and base are integrated structure. the

The cover plate, base and sample cylinder are formed by grinding and spinning a cylindrical plexiglass. the

The cover plate and the base are respectively bonded to the electrode sheet I through the sealant; the electrode sheet II is fixed on the wall of the sample cylinder by bolts and nuts. the

The drainage holes are respectively arranged at a radius of 0.8 times from the center of the pressure plate and the center of the base. the

The sample cylinder, pressure plate, cover plate and base are all made of insulator plexiglass, and the round electrodes, wires, and square electrodes are made of red copper. the

The utility model has the following beneficial effects:

1. The utility model realizes the detection of the change of the resistivity of the soil with time and strain, and is suitable for exploring the change law of the resistivity of soil samples with different properties under loading conditions, and can be used for studying the evolution law of the three-phase medium of the soil , so as to further explore the long-term deformation effects such as consolidation and creep of the soil, which is helpful for the study of the mesoscopic law of the soil test and the study of the post-construction settlement law of the engineering site. the

2. The utility model can realize dynamic observation and visualization effects, and is fast and non-destructive, convenient to disassemble and assemble, and flexible to move. the

Description of drawings

Fig. 1 is the structural representation of the indoor test device of the utility model measuring soil-water-air deformation aging;

Fig. 2 is the structural representation of the indoor test device embodiment of the utility model measuring soil-water-air deformation aging;

Fig. 3 is the I-I sectional view of Fig. 2;

Fig. 4 is the Ⅱ-Ⅱ sectional view of Fig. 2;

Fig. 5 is a III-III sectional view of Fig. 2 . the

In the figure, 1. Sample cylinder, 2. Electrode piece Ⅰ, 3. Lead wire, 4. Electrode piece Ⅱ, 5. Drainage hole, 6. Pressure plate, 7. Cover plate, 8. Base, 9. Bolt and nut, 10. Rubber stopper. the

Detailed ways

Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail. the

The indoor test device for measuring soil-water-air deformation aging, see Figure 1, includes an integral sample cylinder 1, with a cover plate 7 on the sample cylinder 1, a base 8 underneath, a cover plate 7, a base 8, and a sample The cylinder 1 is formed by grinding and spinning a cylindrical plexiglass; the cover plate 7 is provided with at least one cylindrical pressure plate 6 to pressurize the sample, and the cover plate 7 is also provided with at least one electrode sheet I2 and a wire 3, the electrode piece I2 and the cover plate 7 are bonded as a whole through the sealant, the electrode piece I2 is drawn out through the wire 3, and connected to the constant voltage resistance meter; the bottom plate 8 is provided with at least one electrode piece I2 and a A wire 3, the electrode piece I2 and the bottom plate 8 are bonded as a whole through the sealant, and the electrode piece I2 is led out through the wire 3, and connected to the constant voltage resistance meter. The inner wall of the test cylinder 1 is provided with electrode pieces II4 at intervals from top to bottom. The electrode pieces II4 are two rows, symmetrically inlaid on the inner wall of the test cylinder 1, fixed by bolts and nuts 9, and led out to the organic glass sample cylinder through the wire 3. 1 The outer wall is connected with a constant voltage resistance meter to measure the radial resistivity. The cover plate 7 and the bottom plate 8 are respectively provided with at least one drainage hole 5 . The drain hole 5 is provided with a rubber stopper 10 . the

Embodiment, the indoor test device for measuring soil-water-air deformation aging includes an integral sample cylinder 1 with a cover plate 7 on the sample cylinder 1 and a base 8 underneath, the cover plate 7, the base 8, and the sample cylinder 1 The three are formed by grinding and spinning a cylindrical plexiglass; a cylindrical pressure plate 6 is provided on the cover plate 7 to pressurize the sample, and a circular electrode is also provided on the cover plate 7 Sheet I2 and a wire 3, the circular electrode sheet I2 and the cover plate 7 are bonded as a whole through the sealant, the circular electrode sheet I2 is drawn out through the wire 3, and connected to the constant voltage resistance meter; the bottom plate 8 is equipped with A circular electrode sheet I2 and a wire 3, the circular electrode sheet I2 and the bottom plate 8 are bonded as a whole through a sealant, and the circular electrode sheet I2 is drawn out through the wire 3 to connect with the constant voltage resistance instrument. Two rows of square electrode sheets II4 are symmetrically arranged on the inner wall of the test cylinder 1, and each row of square electrode sheets II4 is arranged at intervals from top to bottom on the inner wall of the test cylinder 1, and each row has 10 square electrode sheets II4, which are symmetrically embedded in the test chamber. On the inner wall of cylinder 1, it is fixed by bolts and nuts 9, and the electrode piece II4 is led out of the plexiglass sample cylinder 1 through a wire 3 to connect with a constant voltage resistance meter. The cover plate 7 and the bottom plate 8 are respectively provided with at least one drainage hole 5 . The drain hole 5 is provided with a rubber stopper 10 . the

The drain hole 5 on the cover plate 7 is set at a radius of 4/5 from the center of the pressure plate 7, the drain hole 5 on the base 8 is set at a radius of 4/5 from the center of the base 8, and the drainage is realized through a soft rubber plug 10 Hole 5 is drained and undrained. A strain gauge is connected to the pressure plate 6 to realize dynamic measurement of the vertical displacement of the top of the soil sample. In this way, the effect of simultaneously measuring axial and radial resistivity and vertical compression deformation is achieved. the

The sample cylinder 1 is made of insulator plexiglass with an inner diameter of 112 mm and a thickness of 10 mm, and a height of 150 mm. The cover plate 7 and base 8 are also made of plexiglass with an outer diameter of 150 mm and a thickness of about 10 mm. the

Circular electrode piece Ⅰ2 has a diameter of 110mm and a thickness of 1mm, square electrode piece Ⅱ4 has a size of 15mm×15mm, the diameter of wire 3 is 2mm, the diameter of bolt is 5mm, the diameter of drainage hole 5 is 2mm, and there are two adjacent rows of bolt shafts up and down. Heart distance is 20mm. the

Circular electrode sheet I2, wire 3, square electrode sheet II4, bolts and nuts 9 are all made of red copper. the

The method of use is as follows:

1. Preparation of samples: Compact the soil samples in layers according to the provisions of the indoor consolidation compression test ("Geotechnical Test Method Standard"-GB/T50123-1999), and make the soil samples with a certain initial moisture content, dry density or saturation. The remodeled sample can also be cut into the original sample by in-situ soil sample fetcher. the

2. Put the sample in the moisturizing cylinder and let it stand for 24 hours. During the standing period, turn the sample up and down so that the moisture content inside the sample can be kept uniform. the

3. Place the sample in the sample cylinder 1, and connect the wire 3 to the constant voltage resistance meter, dynamically monitor the axial and radial resistivity of the sample, and at the same time place the strain gauge on the upper part of the pressure plate 6, Dynamically measure the vertical deformation of the specimen during loading. The entire monitoring process can be read manually or by machine. The technology in this area is quite mature. Through this device, the resistivity and strain of the soil during the compression process can be easily, quickly and non-destructively monitored. In this way, the relevant theories of soil mechanics are combined to deeply explore the water migration process and structure evolution mechanism inside the soil. the

Claims (9)

1. The indoor test device for measuring the deformation aging of soil-water-air is characterized in that it includes a sample cylinder (1), and the sample cylinder (1) is provided with a cover plate (7) and a base (8) below, The cover plate (7) is provided with a pressure plate (6), the cover plate (7) and the base (8) are respectively provided with electrode sheet I (2), and the inner wall of the sample cylinder (1) is Electrode sheets II (4) are arranged at intervals along the axial direction, and the electrode sheets I (2) and II (4) are all connected to a constant voltage resistance meter. 2. the indoor test device of measuring soil-water-air deformation aging as claimed in claim 1, It is characterized in that, the electrode piece I (2) on the cover plate (7) and the base (8) is respectively connected to the constant voltage resistance meter through a wire (3), and each electrode piece II (4) is connected through a wire ( 3) Pass through the wall of the sample cylinder (1) and connect with a constant voltage resistance meter. 3. The indoor test device for measuring soil-water-air deformation aging as claimed in claim 1 or 2, characterized in that, the electrode sheets II (4) are in two rows, and the two rows of electrode sheets II (4) are along the test line. The sample cylinder (1) is arranged radially symmetrically. 4. The indoor test device for measuring soil-water-air deformation aging according to claim 1 or 2, characterized in that drain holes (5) are respectively provided on the cover plate (7) and the base (8). 5. The indoor test device for measuring soil-water-air deformation aging according to claim 1 or 2, characterized in that the sample cylinder (1), cover plate (7) and base (8) are integrated structure. 6. The indoor test device for measuring soil-water-air deformation aging as claimed in claim 1 or 2, characterized in that, the cover plate (7), base (8) and sample cylinder (1) are passed through a The cylindrical plexiglass is polished and spin-engraved. 7. The indoor test device for measuring soil-water-air deformation aging as claimed in claim 1 or 2, characterized in that, the cover plate (7) and the base (8) are connected to the electrode sheet I (2 ) bonding; the electrode sheet II (4) is fixed on the wall of the sample cylinder (1) by bolts and nuts (9). 8. The indoor test device for measuring the deformation aging of soil-water-air as claimed in claim 3, characterized in that, the drainage holes (5) are respectively arranged at a distance from the center of the pressure plate (6) and the center of the base (8) 0.8 times the radius. 9. The indoor test device for measuring soil-water-air deformation aging as claimed in claim 1 or 2, characterized in that, the sample cylinder (1), pressure plate (6), cover plate (7) and The base (8) is insulator plexiglass, and the electrode sheet I (2), electrode sheet II (4) and wires (3) are all made of red copper.