CN214121848U - Soil body test system under hydraulic coupling effect - Google Patents
Soil body test system under hydraulic coupling effect Download PDFInfo
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- CN214121848U CN214121848U CN202023086608.0U CN202023086608U CN214121848U CN 214121848 U CN214121848 U CN 214121848U CN 202023086608 U CN202023086608 U CN 202023086608U CN 214121848 U CN214121848 U CN 214121848U
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Abstract
The utility model discloses a soil body testing system under the action of hydraulic coupling, which comprises a base, a lifting mechanism arranged on the base, a confining pressure device arranged on the lifting mechanism, an axial pressure device arranged on the confining pressure device, and a water seepage loading mechanism communicated with the confining pressure device; the confining pressure device comprises a confining pressure chamber for placing a cylindrical soil sample and a confining pressure loading measuring mechanism connected with the confining pressure chamber, and the water seepage loading mechanism comprises a water seepage component communicated with the top of the cylindrical soil sample and a water collection component communicated with the bottom of the cylindrical soil sample; the axial compression device comprises an axial compression loading frame arranged on the base, an axial compression measuring component matched with the axial compression loading frame and a displacement meter connected with the axial compression measuring component. The utility model discloses test the soil body under the hydraulic coupling effect to obtain axial strain, volume strain, the osmotic coefficient of the soil body, thereby be convenient for the mechanical parameter of follow-up research soil sample.
Description
Technical Field
The utility model belongs to geotechnical engineering test field especially relates to a soil body test system under hydraulic coupling effect.
Background
Currently, the indoor test for researching deformation characteristics of various soil samples under the action of hydraulic coupling mainly comprises the following steps: direct shear tests, consolidation tests based on consolidators, conventional triaxial shear tests, and the like. The direct shear apparatus has no water seepage device, and can only carry out a shear test on soil samples under different water content conditions, namely a 'double-line method', so that the mechanical property of the soil samples in the permeation process cannot be directly reflected; and the direct shear apparatus can not measure the mechanical parameters of the soil sample such as axial strain, volume strain, permeability coefficient and the like in the shearing process. Although the consolidometer can carry out staged loading and water seepage on the soil sample in the test process, the properties of the soil sample cannot be reflected more truly; and the consolidation apparatus also has the problem of less monitoring indexes. The conventional three-axis shearing instrument mainly comprises a pressure chamber, a loading frame, a back pressure device, a drain pipe, monitoring equipment and the like. For the water seepage process in the triaxial shearing apparatus, the volume strain and the permeability coefficient of the soil sample cannot be calculated through the drain pipe because the water seepage amount in the counter pressure device cannot be determined. Namely, the conventional triaxial shear apparatus can be used for carrying out a hydraulic coupling test, but cannot be used for measuring the volume strain and the permeability coefficient of a sample, and the volume strain and the permeability coefficient are important indexes reflecting the structural change, the compaction degree and the permeability characteristic of a soil sample.
Therefore, a soil body test system under the action of hydraulic coupling is lacked at present, the soil body can be tested under the action of hydraulic coupling, the axial strain, the volume strain and the permeability coefficient of the soil body can be obtained, the test operation is convenient, and the subsequent research on the mechanical parameters of the soil sample is facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art provides a soil body test system under hydraulic coupling effect, and its reasonable in design can be tested the soil body under hydraulic coupling effect to acquire axial strain, volume strain, the osmotic coefficient of the soil body, experimental simple operation, thereby the mechanical parameter of the follow-up study soil sample of being convenient for.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a soil body test system under hydraulic coupling effect which characterized in that: the device comprises a base, a lifting mechanism arranged on the base, a confining pressure device arranged on the lifting mechanism, a shaft pressure device arranged on the confining pressure device, and a water seepage loading mechanism communicated with the confining pressure device;
the confining pressure device comprises a confining pressure chamber for placing a cylindrical soil sample and a confining pressure loading measuring mechanism connected with the confining pressure chamber, and the water seepage loading mechanism comprises a water seepage component communicated with the top of the cylindrical soil sample and a water collection component communicated with the bottom of the cylindrical soil sample;
the axial compression device comprises an axial compression loading frame arranged on the base, an axial compression measuring component matched with the axial compression loading frame and a displacement meter connected with the axial compression measuring component.
The soil body test system under the hydraulic coupling effect is characterized in that: the axial pressure measuring component comprises a force measuring sensor, an upper transmission rod and a lower transmission rod, the upper transmission rod is installed at the top of the force measuring sensor and matched with the axial pressure loading frame, the lower transmission rod is installed at the bottom of the force measuring sensor, and the bottom of the lower transmission rod penetrates through the confining pressure chamber to be in contact with the top of the cylindrical soil sample; the lower transmission rod is provided with an installation rod for installing the displacement meter, and a telescopic probe of the displacement meter is abutted against the top surface of the confining pressure chamber.
The soil body test system under the hydraulic coupling effect is characterized in that: the water seepage part comprises a water seepage cylinder, a pressurizing pipe which is arranged at the top of the water seepage cylinder and communicated with the water seepage cylinder, and a water injection pipe which is arranged at the bottom of the water seepage cylinder and injects water to a cylindrical soil sample in a confining pressure chamber, wherein a water injection valve is arranged on the water injection pipe, a pressurizing valve and a pressure gauge are arranged on the pressurizing pipe, and an upper water level sensor is arranged in the water seepage cylinder;
the water collecting part comprises a water discharging pipe connected with the bottom of the cylindrical soil sample and a water collecting cylinder communicated with the water discharging pipe, a lower water level sensor is arranged in the water collecting cylinder, and a water discharging valve is arranged on the water discharging pipe.
The soil body test system under the hydraulic coupling effect is characterized in that: the confining pressure loading measuring mechanism comprises an outer pressure-bearing pipe and an inner measuring pipe arranged in the outer pressure-bearing pipe, the outer pressure-bearing pipe and the inner measuring pipe are coaxially arranged, a gap is arranged between the outer side wall of the inner measuring pipe and the inner side wall of the outer pressure-bearing pipe, the outside of the bottom of the outer pressure-bearing pipe is attached to the inside of the bottom of the inner measuring pipe, the top surface of the inner measuring pipe is lower than the top bottom surface of the outer pressure-bearing pipe, and the top of the inner measuring pipe is provided with an opening;
the inner layer measuring tube is communicated with the bottom of the confining pressure chamber through a connecting tube, a water outlet valve is arranged on the connecting tube, and an inner water level sensor is arranged in the inner layer measuring tube;
the top of the outer pressure bearing pipe is provided with an external pressure pipe, and the external pressure pipe is provided with an external pressure valve and an external pressure gauge.
The soil body test system under the hydraulic coupling effect is characterized in that: elevating system includes that lifting bottom plate and two symmetries set up the lifting unit of lifting bottom plate both sides, two lifting unit structure is the same, two lifting unit all establishes including the elevator motor of installing on the base, the lift lead screw of being connected with the elevator motor transmission and cover the screw on the lift lead screw is established and the cover is established on the lift lead screw and with the connecting plate that the screw is connected, connecting plate and lifting bottom plate are connected, enclose the room and install on lifting bottom plate.
The soil body test system under the hydraulic coupling effect is characterized in that: the axle pressure loading frame comprises two upright posts symmetrically arranged on the base and a cross beam arranged on the two upright posts, wherein cross beam through holes are formed in two ends of the cross beam, the diameter of each cross beam through hole is larger than that of each upright post, two ends of the cross beam can penetrate through the upright posts, nuts are arranged on the upright posts, the number of the nuts is two, and the two nuts are positioned on the upper side and the lower side of the cross beam;
the beam is provided with a loading rod matched with the upper transmission rod, the loading rod is provided with two locking nuts, and the two locking nuts are located on the upper side and the lower side of the beam.
The soil body test system under the hydraulic coupling effect is characterized in that: an upper filter paper is arranged at the top of the cylindrical soil sample, an upper permeable stone is arranged on the upper filter paper, a lower filter paper is arranged at the bottom of the cylindrical soil sample, and a lower permeable stone is arranged below the lower filter paper;
the outer side wall of the cylindrical soil sample is provided with a rubber mold, the top of the rubber mold is 2-3 cm higher than the top of the upper permeable stone, and the bottom of the rubber mold is 2-3 cm lower than the bottom of the lower permeable stone;
the cylindrical soil sample is positioned between the middle support and the top support, the bottom of the lower permeable stone is attached to the top of the bottom support, the top of the upper permeable stone is attached to the bottom of the top support, the bottom of the rubber mold stretches into the outer side surface of the bottom support, and the top of the rubber mold stretches into the outer side surface of the top support.
Compared with the prior art, the utility model has the following advantage:
1. simple structure, reasonable in design and simple and convenient, the input cost is lower in the installation.
2. The adopted confining pressure chamber is convenient for mounting the cylindrical soil sample on one hand, so that the bottom of the cylindrical soil sample is hermetically attached to a bottom support in the confining pressure chamber, and the top of the cylindrical soil sample is attached to a top support; on the other hand, the water is injected into the confining pressure chamber, so that the surrounding pressure state of the periphery of the cylindrical soil sample is simulated, and the test accuracy of the cylindrical soil sample is improved.
3. The water seepage loading mechanism comprises a water seepage part and a water collection part, water is injected into the cylindrical soil sample through the water seepage part, and water seeped out of the cylindrical soil sample is collected through the water collection part, so that the permeability coefficient measurement of the cylindrical soil sample is realized.
4. The confining pressure loading measuring mechanism that adopts through confining pressure loading measuring mechanism and confining pressure room intercommunication, realizes confining pressure loading measuring mechanism for confining pressure room water injection on the one hand, and on the other hand cylinder soil sample takes place volume strain extrusion confining pressure room water reflux to confining pressure loading measuring mechanism, can also realize the measurement of the volume strain of cylinder soil sample through confining pressure loading measuring mechanism like this.
5. The adopted lifting mechanism is used for driving the confining pressure chamber to vertically move upwards through a lifting motor in the lifting mechanism, so that a loading test of axial force is realized.
To sum up, the utility model relates to a rationally, can test the soil body under the hydraulic coupling effect to acquire axial strain, volume strain, the osmotic coefficient of the soil body, test operation is convenient, thereby is convenient for follow-up study soil sample's mechanical parameter.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals:
1-axial compression loading frame; 1-erecting a rod; 1-2-beam;
1-3-a nut; 1-4-load lever; 1-5-locking nut;
2-a force sensor; 2-1-lower transfer rod; 2-mounting the rod;
2-3-upper transfer rod; 3-a displacement meter; 4-confining pressure chamber;
4-1-collet; 4-2-jacking; 5-1, putting filter paper;
5-2-lower filter paper; 5-3-coating permeable stone; 5-4-adding permeable stone;
6, rubber mold; 7-cylindrical soil sample; 9-1-a lift motor;
9-2-shaft coupling; 9-3-a nut; 9-4-connecting plate;
9-5-lifting screw rod; 11-1-a pressurized tube;
11-2-pressure gauge; 11-3-a pressurization valve; 12-a water seepage cylinder;
12-1 — upper water level sensor; 13-connecting pipe; 13-1-outlet valve;
14-a water injection pipe; 14-1-a water injection valve; 15-outer layer pressure-bearing pipe;
15-1-external pressure tube; 15-2-external pressure gauge; 15-3-external pressure valve;
16-inner layer measuring tube; 16-1-internal water level sensor; 17-a water collecting cylinder;
17-1-lower water level sensor; 18-a drain pipe; 18-1 — a drain valve;
20-a base; 21-lifting the bottom plate.
Detailed Description
The soil body testing system under the hydraulic coupling effect as shown in fig. 1 comprises a base 20, a lifting mechanism arranged on the base 20, a confining pressure device arranged on the lifting mechanism, an axial pressure device arranged on the confining pressure device, and a water seepage loading mechanism communicated with the confining pressure device;
the confining pressure device comprises a confining pressure chamber 4 for placing a cylindrical soil sample 7 and a confining pressure loading measuring mechanism connected with the confining pressure chamber 4, and the water seepage loading mechanism comprises a water seepage part communicated with the top of the cylindrical soil sample 7 and a water collection part communicated with the bottom of the cylindrical soil sample 7;
the axial compression device comprises an axial compression loading frame 1 arranged on a base 20, an axial compression measuring component matched with the axial compression loading frame 1 and a displacement meter 3 connected with the axial compression measuring component.
In the embodiment, the axle pressure measuring component comprises a load cell 2, an upper transfer rod 2-3 which is arranged at the top of the load cell 2 and is matched with the axle pressure loading frame 1, and a lower transfer rod 2-1 which is arranged at the bottom of the load cell 2, wherein the bottom of the lower transfer rod 2-1 passes through a confining chamber 4 and is contacted with the top of a cylindrical soil sample 7; the lower transmission rod 2-1 is provided with an installation rod 2-2 for installing a displacement meter 3, and a telescopic probe of the displacement meter 3 is abutted against the top surface of the confining pressure chamber 4.
In the embodiment, the water seepage part comprises a water seepage cylinder 12, a pressure pipe 11-1 arranged at the top of the water seepage cylinder 12 and communicated with the water seepage cylinder 12, and a water injection pipe 14 arranged at the bottom of the water seepage cylinder 12 and used for injecting water to the cylindrical soil sample 7 in the confining pressure chamber 4, wherein a water injection valve 14-1 is arranged on the water injection pipe 14, a pressure valve 11-3 and a pressure gauge 11-2 are arranged on the pressure pipe 11-1, and an upper water level sensor 12-1 is arranged in the water seepage cylinder 12;
the water collecting part comprises a water discharging pipe 18 connected with the bottom of the cylindrical soil sample 7 and a water collecting cylinder 17 communicated with the water discharging pipe 18, a lower water level sensor 17-1 is arranged in the water collecting cylinder 17, and a water discharging valve 18-1 is arranged on the water discharging pipe 18.
In this embodiment, the confining pressure loading measuring mechanism includes an outer pressure-bearing pipe 15 and an inner pressure-measuring pipe 16 arranged in the outer pressure-bearing pipe 15, the outer pressure-bearing pipe 15 and the inner pressure-measuring pipe 16 are coaxially arranged, a gap is arranged between the outer side wall of the inner pressure-measuring pipe 16 and the inner side wall of the outer pressure-bearing pipe 15, the outer bottom of the outer pressure-bearing pipe 15 is attached to the inner bottom of the inner pressure-measuring pipe 16, the top surface of the inner pressure-measuring pipe 16 is lower than the bottom surface of the top of the outer pressure-bearing pipe 15, and the top of the inner pressure-measuring pipe 16 is open;
the inner layer measuring tube 16 is communicated with the inside of the bottom of the confining pressure chamber 4 through a connecting tube 13, a water outlet valve 13-1 is arranged on the connecting tube 13, and an inner water level sensor 16-1 is arranged in the inner layer measuring tube 16;
an external pressure applying pipe 15-1 is arranged at the top of the outer-layer pressure-bearing pipe 15, and an external pressure applying valve 15-3 and an external pressure gauge 15-2 are arranged on the external pressure applying pipe 15-1.
In this embodiment, the lifting mechanism includes a lifting bottom plate 21 and two lifting components symmetrically disposed on two sides of the lifting bottom plate 21, the two lifting components have the same structure, and each of the two lifting components includes a lifting motor 9-1 mounted on a base 20, a lifting screw 9-5 in transmission connection with the lifting motor 9-1, a nut 9-3 sleeved on the lifting screw 9-5, and a connecting plate 9-4 sleeved on the lifting screw 9-5 and connected with the nut 9-3, the connecting plate 9-4 is connected with the lifting bottom plate 21, and the confining pressure chamber 4 is mounted on the lifting bottom plate 21.
In the embodiment, the axial compression loading frame 1 comprises two upright posts 1-1 symmetrically arranged on a base 20 and a crossbeam 1-2 arranged on the two upright posts 1-1, wherein crossbeam through holes are formed in two ends of the crossbeam 1-2, the diameter of each crossbeam through hole is larger than that of each upright post 1-1, two ends of the crossbeam 1-2 can penetrate through the upright posts 1-1, nuts 1-3 are arranged on the upright posts 1-1, the number of the nuts 1-3 is two, and the two nuts 1-3 are positioned on the upper side and the lower side of the crossbeam 1-2;
the cross beam 1-2 is provided with loading rods 1-4 matched with the upper transmission rods 2-3, the loading rods 1-4 are provided with two locking nuts 1-5, and the two locking nuts 1-5 are positioned on the upper side and the lower side of the cross beam 1-2.
In the embodiment, the top of the cylindrical soil sample 7 is provided with an upper filter paper 5-1, the upper filter paper 5-1 is provided with an upper permeable stone 5-3, the bottom of the cylindrical soil sample 7 is provided with a lower filter paper 5-2, and a lower permeable stone 5-4 is arranged below the lower filter paper 5-2;
the outer side wall of the cylindrical soil sample 7 is provided with a rubber mold 6, the top of the rubber mold 6 is 2 cm-3 cm higher than the top of the upper permeable stone 5-3, and the bottom of the rubber mold 6 is 2 cm-3 cm lower than the bottom of the lower permeable stone 5-4;
the cylindrical soil sample 7 is positioned between a middle bottom support 4-1 and a top support 4-2, the bottom of the lower permeable stone 5-4 is attached to the top of the bottom support 4-1, the top of the upper permeable stone 5-3 is attached to the bottom of the top support 4-2, the bottom of the rubber mold 6 extends into the outer side surface of the bottom support 4-1, and the top of the rubber mold 6 extends into the outer side surface of the top support 4-2.
In the embodiment, the confining pressure chamber 4 is arranged, on one hand, the installation of the cylindrical soil sample 7 is facilitated, so that the bottom of the cylindrical soil sample 7 is attached to the bottom support 4-1 in the confining pressure chamber 4, and the top of the cylindrical soil sample 7 is attached to the top support 4-2; on the other hand, the water is injected into the confining pressure chamber 4, so that the surrounding pressure state of the cylindrical soil sample 7 is simulated, and the test accuracy of the cylindrical soil sample 7 is improved.
In this embodiment, infiltration loading mechanism is including infiltration part and water collection part, gives the water injection in the cylindrical soil sample 7 through the infiltration part, collects the water that oozes in the cylindrical soil sample 7 through the water collection part to realize the osmotic coefficient measurement of cylindrical soil sample 7.
In this embodiment, confined pressure loading measuring mechanism, through confined pressure loading measuring mechanism and confined pressure chamber 4 intercommunication, realize confined pressure loading measuring mechanism for confined pressure chamber 4 water injection on the one hand, on the other hand cylinder soil sample 7 takes place that volume strain extrudees that confined pressure chamber 4 water backward flow to confined pressure loading measuring mechanism, can also realize the measurement of the volume strain of cylinder soil sample 7 through confined pressure loading measuring mechanism like this.
In this embodiment, the lifting mechanism drives the confining pressure chamber 4 to vertically move downwards through the lifting motor 9-1 in the lifting mechanism, so as to realize a loading test of the axial pressure and improve the test range.
In the embodiment, the axial pressure measuring component comprises a force measuring sensor, an upper transmission rod and a lower transmission rod, and the lower transmission rod is arranged to facilitate the installation of the connecting installation rod 2-2, so that the installation of the displacement meter 3 is realized, and the axial strain of the cylindrical soil sample 7 is conveniently transmitted to the displacement meter 3 through the lower transmission rod; the force sensor is arranged to detect the axial pressure loaded on the cylindrical soil sample 7.
In the embodiment, during actual connection, the output shaft of the lifting motor 9-1 is in transmission connection with the lifting screw rod 9-5 through the coupler 9-2.
In the embodiment, the upper water level sensor 12-1, the lower water level sensor 17-1 and the inner water level sensor 16-1 can refer to PY201-RS485 type liquid level sensors, and have the advantages of high precision, high reliability, convenience in use and the like.
In this embodiment, the lifting motor 9-1 may refer to a servo motor.
In this embodiment, the displacement meter 3 may refer to an inductance frequency modulation type displacement sensor.
In this embodiment, the load cell 2 is an S-shaped load cell.
When the utility model is used in detail, when the confining pressure is loaded, the outlet valve 13-1 is operated, the external pressure valve 15-3 is opened, the external pressure pipe 15-1 is filled with compressed gas, water in the internal pressure pipe 16 is filled with water in the confining pressure chamber 4 through the connecting pipe 13, so that the confining pressure chamber 4 is filled with water, in the process of filling the compressed gas in the external pressure pipe 15-1, the external pressure gauge 15-2 detects the pressure in the external pressure pipe 15-1, the pressure in the external pressure pipe 15-1 meets the requirement value of the confining pressure test through the adjustment of the external pressure valve 15-3, when the confining pressure chamber 4 is filled with water, the water level in the internal pressure pipe 16 is detected by the internal water level sensor 16-1, and when the confining pressure chamber is filled with water, the water level of the internal pressure pipe is marked as the initial water level of the internal pressure pipe;
in the loading process of confining pressure of the cylindrical soil sample 7, the inner water level sensor 16-1 detects the water level in the inner measuring tube 16 in real time, changes the detected water level of the inner measuring tube, and obtains the volume strain of the cylindrical soil sample 7 according to the water level change value of the inner measuring tube and the initial water level of the inner measuring tube.
When the axial pressure is loaded, the initial value of the displacement value detected by the displacement meter 3, the lifting mechanism pushes the confining pressure chamber 4 to move upwards until the top of the upper transfer rod 2-3 contacts the loading rod 1-4, the pressure applied by the loading rod 1-4 is transferred to the cylindrical soil sample 7 through the upper transfer rod 2-3, the force measuring sensor 2 and the lower transfer rod 2-1, and the axial pressure of the cylindrical soil sample 7 is loaded;
in the loading process of the axial pressure of the cylindrical soil sample 7, the internal water level sensor 16-1 detects the water level in the inner measuring tube 16 in real time, and the volume strain of the cylindrical soil sample 7 when the axial pressure is loaded is obtained according to the method;
meanwhile, the force measuring sensor 2 detects the axial pressure loaded on the cylindrical soil sample 7, the axial pressure is detected, the lower transmission rod 2-1 and the mounting rod 2-2 drive the telescopic probe of the displacement meter 3 to move, the displacement value detected by the displacement meter 3 changes, and the axial strain of the cylindrical soil sample 7 is obtained through the displacement value and the initial displacement value.
When the hydraulic coupling is used, the water injection valve 14-1 is operated to be opened, compressed gas is filled into the water seepage cylinder 12 through the pressurization pipe 11-1, and water in the water seepage cylinder 12 is injected into the cylindrical soil sample 7 through the water injection pipe 14; in the process of filling compressed gas into the pressurizing pipe 11-1, the pressure gauge 11-2 detects the pressure in the pressurizing pipe 11-1, and the pressure in the pressurizing pipe 11-1 meets the requirement value of a penetration test through the adjustment of the water injection valve 14-1; meanwhile, the drain valve 18-1 is operated to be opened, and water permeating from the cylindrical soil sample 7 enters the water collecting cylinder 17 through the drain pipe 18;
in the process of the penetration of the hydraulic coupling action of the cylindrical soil sample 7, the internal water level sensor 16-1 detects the water level in the internal measuring tube 16 in real time, and the volume strain and the axial strain of the cylindrical soil sample 7 during the penetration are obtained according to the method;
in the process of the hydraulic coupling effect infiltration of the cylindrical soil sample 7, the lower water level sensor 17-1 detects the water level of the water collecting barrel 17, the upper water level sensor 12-1 detects the water level of the water seepage barrel 12, and the water level in the water seepage barrel 12 and the water level in the water collecting barrel 17 are combined according to Darcy's law to obtain the infiltration coefficient of the cylindrical soil sample 7.
In the embodiment, the lifting motor 9-1 is operated to rotate, the lifting motor 9-1 rotates to drive the lifting screw rod 9-5 to rotate, and the lifting screw rod 9-5 rotates to drive the confining pressure chamber 4 to vertically move upwards through the screw nut 9-3 and the connecting plate 9-4.
In this embodiment, in an actual experiment, before the cylindrical soil sample 7 is placed in the confining pressure chamber 4, water is injected into the water collecting cylinder 17, and a part of the water in the water collecting cylinder 17 enters the water discharging pipe 18, so that no air bubbles exist in the water discharging pipe 18.
To sum up, the utility model relates to a rationally, can test the soil body under the hydraulic coupling effect to acquire axial strain, volume strain, the osmotic coefficient of the soil body, test operation is convenient, thereby is convenient for follow-up study soil sample's mechanical parameter.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (7)
1. The utility model provides a soil body test system under hydraulic coupling effect which characterized in that: the device comprises a base (20), a lifting mechanism arranged on the base (20), a confining pressure device arranged on the lifting mechanism, a shaft pressure device arranged on the confining pressure device, and a water seepage loading mechanism communicated with the confining pressure device;
the confining pressure device comprises a confining pressure chamber (4) for placing a cylindrical soil sample (7) and a confining pressure loading measuring mechanism connected with the confining pressure chamber (4), and the water seepage loading mechanism comprises a water seepage component communicated with the top of the cylindrical soil sample (7) and a water collection component communicated with the bottom of the cylindrical soil sample (7);
the axial compression device comprises an axial compression loading frame (1) arranged on a base (20), an axial compression measuring component matched with the axial compression loading frame (1) and a displacement meter (3) connected with the axial compression measuring component.
2. A soil testing system under hydraulic coupling as claimed in claim 1 wherein: the axial pressure measuring component comprises a force measuring sensor (2), an upper transfer rod (2-3) which is arranged at the top of the force measuring sensor (2) and matched with the axial pressure loading frame (1), and a lower transfer rod (2-1) which is arranged at the bottom of the force measuring sensor (2), wherein the bottom of the lower transfer rod (2-1) passes through a confining pressure chamber (4) and is contacted with the top of a cylindrical soil sample (7); the lower transmission rod (2-1) is provided with an installation rod (2-2) for installing the displacement meter (3), and a telescopic probe of the displacement meter (3) is abutted against the top surface of the confining pressure chamber (4).
3. A soil testing system under hydraulic coupling as claimed in claim 1 wherein: the water seepage part comprises a water seepage cylinder (12), a pressure pipe (11-1) arranged at the top of the water seepage cylinder (12) and communicated with the water seepage cylinder (12), and a water injection pipe (14) arranged at the bottom of the water seepage cylinder (12) and used for injecting water into an inner cylindrical soil sample (7) of a confining pressure chamber (4), wherein a water injection valve (14-1) is arranged on the water injection pipe (14), a pressure valve (11-3) and a pressure gauge (11-2) are arranged on the pressure pipe (11-1), and an upper water level sensor (12-1) is arranged in the water seepage cylinder (12);
the water collecting part comprises a water discharging pipe (18) connected with the bottom of the cylindrical soil sample (7) and a water collecting cylinder (17) communicated with the water discharging pipe (18), a water level sensor (17-1) is arranged in the water collecting cylinder (17), and a water discharging valve (18-1) is arranged on the water discharging pipe (18).
4. A soil testing system under hydraulic coupling as claimed in claim 1 wherein: the confining pressure loading measuring mechanism comprises an outer pressure-bearing pipe (15) and an inner measuring pipe (16) arranged in the outer pressure-bearing pipe (15), the outer pressure-bearing pipe (15) and the inner measuring pipe (16) are coaxially arranged, a gap is arranged between the outer side wall of the inner measuring pipe (16) and the inner side wall of the outer pressure-bearing pipe (15), the outside of the bottom of the outer pressure-bearing pipe (15) is attached to the inside of the bottom of the inner measuring pipe (16), the top surface of the inner measuring pipe (16) is lower than the bottom surface of the top of the outer pressure-bearing pipe (15), and the top of the inner measuring pipe (16) is opened;
the inner layer measuring pipe (16) is communicated with the bottom of the confining pressure chamber (4) through a connecting pipe (13), a water outlet valve (13-1) is arranged on the connecting pipe (13), and an inner water level sensor (16-1) is arranged in the inner layer measuring pipe (16);
an external pressure applying pipe (15-1) is arranged at the top of the outer pressure bearing pipe (15), and an external pressure applying valve (15-3) and an external pressure gauge (15-2) are arranged on the external pressure applying pipe (15-1).
5. A soil testing system under hydraulic coupling as claimed in claim 1 wherein: the lifting mechanism comprises a lifting bottom plate (21) and two lifting parts which are symmetrically arranged on two sides of the lifting bottom plate (21), the two lifting parts are identical in structure and comprise a lifting motor (9-1) arranged on a base (20), a lifting screw rod (9-5) in transmission connection with the lifting motor (9-1), a screw nut (9-3) sleeved on the lifting screw rod (9-5) and a connecting plate (9-4) sleeved on the lifting screw rod (9-5) and connected with the screw nut (9-3), the connecting plate (9-4) is connected with the lifting bottom plate (21), and the confining chamber (4) is arranged on the lifting bottom plate (21).
6. A soil testing system under hydraulic coupling as claimed in claim 1 wherein: the axial compression loading frame (1) comprises two upright posts (1-1) symmetrically arranged on a base (20) and a cross beam (1-2) arranged on the two upright posts (1-1), wherein cross beam through holes are formed in two ends of the cross beam (1-2), the diameter of each cross beam through hole is larger than that of each upright post (1-1), two ends of the cross beam (1-2) can penetrate through the upright posts (1-1), nuts (1-3) are arranged on the upright posts (1-1), the number of the nuts (1-3) is two, and the two nuts (1-3) are positioned on the upper side and the lower side of the cross beam (1-2);
the loading rod (1-4) matched with the upper transfer rod (2-3) is arranged on the cross beam (1-2), the loading rod (1-4) is provided with two locking nuts (1-5), and the two locking nuts (1-5) are located on the upper side and the lower side of the cross beam (1-2).
7. A soil testing system under hydraulic coupling as claimed in claim 1 wherein: an upper filter paper (5-1) is arranged at the top of the cylindrical soil sample (7), an upper permeable stone (5-3) is arranged on the upper filter paper (5-1), a lower filter paper (5-2) is arranged at the bottom of the cylindrical soil sample (7), and a lower permeable stone (5-4) is arranged below the lower filter paper (5-2);
a rubber mold (6) is arranged on the outer side wall of the cylindrical soil sample (7), the top of the rubber mold (6) is 2-3 cm higher than the top of the upper permeable stone (5-3), and the bottom of the rubber mold (6) is 2-3 cm lower than the bottom of the lower permeable stone (5-4);
the cylindrical soil sample (7) is positioned between the middle bottom support (4-1) and the top support (4-2), the bottom of the lower permeable stone (5-4) is attached to the top of the bottom support (4-1), the top of the upper permeable stone (5-3) is attached to the bottom of the top support (4-2), the bottom of the rubber mold (6) extends into the outer side surface of the bottom support (4-1), and the top of the rubber mold (6) extends into the outer side surface of the top support (4-2).
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| CN202023086608.0U CN214121848U (en) | 2020-12-18 | 2020-12-18 | Soil body test system under hydraulic coupling effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735378A (en) * | 2023-05-29 | 2023-09-12 | 广州建筑股份有限公司 | Device and method for testing along-drilling follow pipe pile side grouting shear model |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116735378A (en) * | 2023-05-29 | 2023-09-12 | 广州建筑股份有限公司 | Device and method for testing along-drilling follow pipe pile side grouting shear model |
| CN116735378B (en) * | 2023-05-29 | 2024-04-16 | 广州建筑股份有限公司 | Device and method for testing along-drilling follow pipe pile side grouting shear model |
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