Pneumatic type coupling system for preparing large remolded clay and performing one-dimensional consolidation test

Abstract

The invention discloses a pneumatic type coupling system for preparing large remolded clay and performing one-dimensional consolidation test, which can be used for preparing a large-size cylindrical sample or hollow cylindrical sample of remolded clay in geotechnical engineering, and also can be used for performing one-dimensional consolidation test of a large clay sample. The pneumatic type coupling system comprises a displacement measuring system, a combined pressure cavity, a pore-pressure measuring system, a discharged-water volume measuring system, a pneumatic loading system and an axial tightening member. The pneumatic type coupling system disclosed by the invention has the advantages that the loading is carried out by a pneumatic mode, the pressurization is stable, uniform, measurable and controllable, the loading pressure can be more than 1.6MPa and the defect of difficult application of high pressure in weight loading is effectively overcome; a vertical metal permeable stone is embedded into a rigid and transparent sleeve to form a vertical water discharging channel, so that the defects of single water discharging channel and slow consolidation speed of traditional consolidation equipment are overcome; the pressure cavity of the pneumatic type coupling system is the rigid and transparent sleeve, so that the pneumatic type coupling system has visibility and overcomes the defect of invisibility of a traditional consolidometer.

Description

technical field

[0001] The invention relates to a pneumatic large-scale remodeling clay production and one-dimensional consolidation test coupling system. The device is a geotechnical engineering sample preparation device, belongs to the technical field of geotechnical engineering measuring instrument manufacturing, and is suitable for making large-scale remodeling clay samples , especially hollow cylindrical clay specimens in hollow torsional shear tests. Background technique

[0002] Geotechnical testing is the main means to obtain the physical and mechanical parameters of soil. The national standard of the People's Republic of China "Standards for Soil Testing Methods" (GB / T 50123-1999) is the guiding specification for geotechnical testing in the field of survey and design in my country. In geotechnical testing, the acquisition and preparation of samples is the first and most important step in geotechnical testing. If the sample preparation is not scientific and standardi...

Examples

Embodiment 1

[0024] see figure 1 , figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 As shown, a pneumatic large-scale remodeling clay production and one-dimensional consolidation test coupling system provided by the present invention includes a rigid transparent sleeve, a base 1 and a top cover 2, and the rigid transparent sleeve is equipped with vertically arranged Vertical permeable stone 3, the upper end of the rigid transparent sleeve is plugged into and sealed with the upper sleeve groove 4 provided on the lower surface of the top cover 2, and the lower end is embedded in the lower sleeve groove 5 on the upper surface of the base 1 and Seal fit, the upper sleeve groove 4 is an annular groove, and a rubber ring is placed in the groove, and the lower sleeve groove 5 is an annular groove, and a rubber ring is placed in the groove; the gas isolation end bearing plate 6 will The space surrounded by the top cover 2, the rigid transparent sleeve and ...

Embodiment 2

[0027] The second embodiment is made of a hollow cylindrical sample, which is basically the same as the first embodiment, except that:

[0028] see image 3 , Figure 8 , Figure 11 , the gas barrier end bearing plate 6 used in the experiment of making a large-scale consolidated sample is a circular loading plate, and the circular loading plate is a solid steel plate, while the gas barrier end bearing plate 6 used in the second embodiment is a circular loading plate. The plate is provided with a ring-shaped loading plate bolt hole, which is threadedly connected with the rigid connecting rod 9, and the ring-shaped permeable stone is directly in contact with the ring-shaped loading plate, and the ring-shaped permeable stone is placed above the hollow cylindrical soil sample. The annular loading plate has a thickness of 13 mm, an outer diameter of 100 mm, and an inner diameter of 60 mm.

[0029] see Figure 4 , Figure 8 , Figure 11 The second difference between the second...

technical field

[0001] The invention relates to a pneumatic large-scale remodeling clay production and one-dimensional consolidation test coupling system. The device is a geotechnical engineering sample preparation device, belongs to the technical field of geotechnical engineering measuring instrument manufacturing, and is suitable for making large-scale remodeling clay samples , especially hollow cylindrical clay specimens in hollow torsional shear tests. Background technique

[0002] Geotechnical testing is the main means to obtain the physical and mechanical parameters of soil. The national standard of the People's Republic of China "Standards for Soil Testing Methods" (GB / T 50123-1999) is the guiding specification for geotechnical testing in the field of survey and design in my country. In geotechnical testing, the acquisition and preparation of samples is the first and most important step in geotechnical testing. If the sample preparation is not scientific and standardi...

Examples

Embodiment 1

[0024] see figure 1 , figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 As shown, a pneumatic large-scale remodeling clay production and one-dimensional consolidation test coupling system provided by the present invention includes a rigid transparent sleeve, a base 1 and a top cover 2, and the rigid transparent sleeve is equipped with vertically arranged Vertical permeable stone 3, the upper end of the rigid transparent sleeve is plugged into and sealed with the upper sleeve groove 4 provided on the lower surface of the top cover 2, and the lower end is embedded in the lower sleeve groove 5 on the upper surface of the base 1 and Seal fit, the upper sleeve groove 4 is an annular groove, and a rubber ring is placed in the groove, and the lower sleeve groove 5 is an annular groove, and a rubber ring is placed in the groove; the gas isolation end bearing plate 6 will The space surrounded by the top cover 2, the rigid transparent sleeve and ...

Embodiment 2

[0027] The second embodiment is made of a hollow cylindrical sample, which is basically the same as the first embodiment, except that:

[0028] see image 3 , Figure 8 , Figure 11 , the gas barrier end bearing plate 6 used in the experiment of making a large-scale consolidated sample is a circular loading plate, and the circular loading plate is a solid steel plate, while the gas barrier end bearing plate 6 used in the second embodiment is a circular loading plate. The plate is provided with a ring-shaped loading plate bolt hole, which is threadedly connected with the rigid connecting rod 9, and the ring-shaped permeable stone is directly in contact with the ring-shaped loading plate, and the ring-shaped permeable stone is placed above the hollow cylindrical soil sample. The annular loading plate has a thickness of 13 mm, an outer diameter of 100 mm, and an inner diameter of 60 mm.

[0029] see Figure 4 , Figure 8 , Figure 11 The second difference between the second...

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