CN-117664743-B - Soil-moving triaxial tester with multiple pressure cabins

Abstract

The invention relates to the technical field of dynamic strength triaxial test equipment in geotechnical tests, in particular to a multi-pressure cabin soil-action triaxial test instrument which comprises a data acquisition unit, a confining pressure controller, a back pressure controller and a main body tester, wherein the main body tester comprises a lead screw, an upper top seat, a loading structure, three cabin pressure chambers and a lower cabin base; according to the invention, a single loading rod is improved into three loading rods, and the three-cabin pressure chamber and the base with the three-cabin mounting groove can be used for simultaneously carrying out triaxial test on the soil dynamic strength of three soil samples, and the three-cabin pressure chamber and the base can be converted into a traditional single-cabin test cabin for testing if only a single soil sample is needed to be tested.

Inventors

• LIU RUN
• SU CHUNYANG
• CHEN GUANGSI
• LIANG CHAO

Assignees

• 天津大学

Dates

Publication Date

20260512

Application Date

20231207

Claims (6)

1. 1. The utility model provides a many pressure compartment soil moves triaxial tester, including data acquisition ware (2), enclose pressure controller (4), back pressure controller (5) and main part tester (34), a serial communication port, main part tester (34) are including lead screw (6), upper portion footstock (7), loading structure (9), three cabin pressure chamber (29) and lower part cabin base (25), the inside bottom of main part tester (34) is provided with lower part cabin base (25), lower part cabin base (25) upper end left side is provided with lead screw (6), driving motor (8) are installed in lower part cabin base (25) lower extreme left side, and the output of driving motor (8) runs through lower part cabin base (25) and is connected with lead screw (6), lower part cabin base (25) upper end right side is provided with auxiliary rod (37), threaded connection has upper portion footstock (7) on lead screw (6), loading structure (9) are installed to upper portion footstock (7) lower extreme, loading structure (9) contain total, body frame structure and three loading rod (10), loading rod (10) are equipped with displacement sensor and three four sides and are equipped with displacement transducer, all load controller (10, all load signal controller (11); The middle part of the upper end of the lower cabin base (25) is provided with a single cabin accommodating groove (36) and a three cabin accommodating groove (30), the three cabin accommodating groove (30) is formed by three groups of single cabin accommodating grooves (36), the upper end of the lower cabin base (25) is provided with a plurality of bolts (23), a single cabin pressure chamber (35) is arranged at the single cabin accommodating groove (36) through the bolts (23), a three cabin pressure chamber (29) is arranged at the three cabin accommodating groove (30) through the bolts (23), and the three cabin pressure chamber (29) is formed by three groups of single cabin pressure chambers (35); The single-cabin pressure chamber (35) is provided with a confining pressure air inlet (12), the upper part of the single-cabin pressure chamber (35) is provided with a force transmission connecting rod (14), the upper end of the force transmission connecting rod (14) is provided with a force transmission connecting rod upper electromagnetic adsorption joint (13), and the lower end of the force transmission connecting rod (14) is provided with a force transmission connecting rod lower electromagnetic adsorption joint (15); The soil sample base (21) is installed to inside bottom department of single cabin pressure chamber (35), back pressure inlet tube (16) are installed to soil sample base (21) upper end, back pressure water inlet head (17) are installed to back pressure inlet tube (16) upper end, back pressure water inlet head (17) and soil sample base (21) side department sets up the recess, install vacuum induction port (32) in the recess, back pressure inlet tube (16) outside is provided with rubber membrane (18), and back pressure water inlet head (17) are located rubber membrane (18) upper portion, back pressure inlet tube (16) inside is provided with soil sample mount pad, be provided with soil sample (20) on the soil sample mount pad, be provided with hole pressure sensor (33) on soil sample base (21), and the outlet has been seted up down to soil sample base (21) inside.
2. 2. The soil-action triaxial tester with multiple pressure cabins according to claim 1, characterized in that a vacuum suction pump (24) is arranged in a lower cabin base (25), and the vacuum suction pump (24) is connected with a vacuum suction pipe (19).
3. 3. The multi-pressure cabin soil-action triaxial tester according to claim 1, wherein electromagnetic coils (31) are arranged in the loading rod electromagnetic adsorption connector (11), the force transmission connecting rod upper electromagnetic adsorption connector (13), the force transmission connecting rod lower electromagnetic adsorption connector (15) and the back pressure water inlet head (17).
4. 4. The multi-pressure cabin soil-action triaxial tester according to claim 1, wherein a confining pressure water inlet (27) is formed in the right end of the lower cabin base (25), a confining pressure water outlet (26) is formed in the upper end of the lower cabin base (25), the confining pressure water outlet (26) is connected with a confining pressure water pump (28) through a water pipe, and the confining pressure air inlet (12) is connected with a confining pressure air pump (3) through an air pipe.
5. 5. The soil-action triaxial tester with multiple pressure cabins according to claim 4, wherein the confining pressure air pump (3) is electrically connected with a confining pressure controller (4), the confining pressure controller (4) is electrically connected with a computer (1), the computer (1) is electrically connected with a data collector (2) and a back pressure controller (5), the back pressure controller (5) is connected with a back pressure water inlet (22), and the confining pressure controller (4) is in signal connection with a confining pressure water pump (28).
6. 6. The multi-pressure cabin soil motion triaxial tester according to claim 5, wherein the data collector (2) is in signal connection with a master controller, and the displacement sensor and the pore pressure sensor (33) are both in signal connection with the data collector (2).

Description

Soil-moving triaxial tester with multiple pressure cabins Technical Field The invention relates to the technical field of dynamic strength triaxial test equipment in geotechnical tests, in particular to a soil dynamic triaxial tester with a multi-pressure cabin. Background The dynamic strength triaxial test of soil refers to a test that original soil or remolded soil is prepared into a soil sample with a certain specification, a rubber film is sleeved and then is placed in a true triaxial or false triaxial test machine, and a required three-way dynamic load value (or confining pressure value, vertical dynamic load value), dynamic load frequency and the like are set, and a dynamic load is applied to the soil sample to obtain the dynamic strength and other dynamic parameters of the soil sample. The triaxial test of the dynamic strength of the soil is widely applied to the fields of geology, mining, safety and construction, and is an indispensable indoor test for various dynamic engineering and scientific research. The dynamic strength triaxial test equipment of the soil is a single cabin test instrument, the test efficiency is greatly affected by the fact that only one soil sample can be tested at a time, and because the geotechnical dynamic test is generally conducted by adopting a plurality of groups of test contrast, accidental test results are avoided, the economic cost of the equipment is too high, and because of unavoidable differences of the plurality of equipment, the accuracy of the test results is affected, the dynamic triaxial test is different from the static triaxial test in that the static triaxial test is conducted by compressing the soil sample, and therefore the stretching of the soil sample is not required to be considered, but the stretching of the soil sample is required to be considered, the traditional dynamic triaxial test equipment is generally conducted by sleeving a horn-shaped rubber shell on a top cap arranged above the soil sample, and connecting with an upper loading cap, and then sucking out air in a contact surface, so that the middle is in a vacuum state, a compression force is generated in the process of loading and a descending process, and a tensile force is generated in the process, and the accuracy of the test results can be affected by manually installing the horn-shaped rubber shell and the static triaxial test, the static triaxial test is not good for the fact that the quality of the soil sample is affected by the rubber band is affected by the fact that the test results are connected with a triaxial test bench in the process, and the quality of the test bench is easy to be affected after the test is contacted with the soil sample. In order to solve the problems, the application provides a soil motion triaxial tester with a plurality of pressure cabins. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a soil motion triaxial tester with multiple pressure cabins. The problems that the existing dynamic triaxial test is low in efficiency, only one group of tests can be performed each time, the soil sample is greatly disturbed by installing the stretching cap and binding the waterproof rubber band are solved. In order to solve the problems, the invention provides a multi-pressure cabin soil-action triaxial tester which comprises a data acquisition device, a confining pressure controller, a back pressure controller and a main body tester and is characterized in that the main body tester comprises a lead screw, an upper top seat, a loading structure, three cabin pressure chambers and a lower cabin base, the lower cabin base is arranged at the bottom end of the main body tester, the lead screw is arranged at the left side of the upper end of the lower cabin base, a driving motor is arranged at the left side of the lower end of the lower cabin base, the output end of the driving motor penetrates through the lower cabin base to be connected with the lead screw, an auxiliary rod is arranged at the right side of the upper end of the lower cabin base, the lead screw is connected with an upper top seat in a threaded manner, the loading structure is arranged at the lower end of the upper top seat and comprises a total controller, a tetrahedron frame structure and three loading rods, a force sensor and a displacement sensor are arranged on the loading rod, an electromagnetic adsorption joint of the loading rod is arranged at the lower end of the loading rod, and the three loading rods, the force sensor and the displacement sensor are all connected with a total signal. Preferably, a single cabin placing groove and a three cabin placing groove are formed in the middle of the upper end of the lower cabin base, the three cabin placing grooves are formed by three groups of single cabin placing grooves, a plurality of bolts are arranged at the upper end of the lower cabin base, single cabin pressure chambers are arranged at the single cabin pl