CN209727628U - A kind of strain-type unconfined compression apparatus - Google Patents

A kind of strain-type unconfined compression apparatus Download PDF

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Publication number
CN209727628U
CN209727628U CN201920270501.XU CN201920270501U CN209727628U CN 209727628 U CN209727628 U CN 209727628U CN 201920270501 U CN201920270501 U CN 201920270501U CN 209727628 U CN209727628 U CN 209727628U
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China
Prior art keywords
bearing plate
plate
strain
transmission bar
displacement meter
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CN201920270501.XU
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Chinese (zh)
Inventor
孙开畅
朱自立
蒙彦昭
陈璇
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China Three Gorges University CTGU
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China Three Gorges University CTGU
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Abstract

A kind of strain-type unconfined compression apparatus of the utility model, it is related to soil body physical parameters measurement field, including bottom plate and bracket, bottom plate is equipped with pressing mechanism, and pressing mechanism includes driving motor and lifting device, and driving motor and lifting device are electrically connected, driving motor is connected with power switch, lifting device is connect by the first pressure transmission bar with lower bearing plate, and upper bearing plate is fixed on bracket by the second pressure transmission bar, and upper bearing plate is located at the surface of lower bearing plate;Upper bearing plate bottom surface is fixedly connected with pressure sensor, displacement meter is fixedly connected on bracket, displacement meter lower end touches lower pressure-bearing plate top surface, and signal adapter is connected with pressure sensor and displacement meter by conducting wire, and signal adapter signal output end is connected with display screen.The utility model structure is simple, and Operation and Maintenance also facilitates, can improve test accuracy and reduce laboratory technician's working strength, be capable of quick obtaining soil compression strength and each physics relevant parameter.

Description

A kind of strain-type unconfined compression apparatus
Technical field
The utility model relates to soil body physical parameters measurement field, especially a kind of strain-type unconfined compression apparatus.
Background technique
Unconfined compressive strength is the important parameter for differentiating ground soil mechanical properties, it can accurately reflect sample Strength characteristics, in geotechnical engineering, unconfined compression strength test be geotechnical mechanics test in conventional project.The nothing of sample Confined compressive strength is measured by strain-type unconfined compression apparatus, and unconfined compression apparatus is using mechanical loading system to sample Apply axial force, detects the axial force and axial displacement of test process respectively by load cell and displacement sensor, thus Out sample without lateral confinement compressive ultimate strength and stress-strain diagram.Existing unconfined compression apparatus has following to be needed to try less than 1. It tests personnel while observing and recording in axial displacement dial gauge and axial 2. loading procedure of dynamometry percentage meter reading, be in lower pressurization Sample on plate not can guarantee by naked eyes in center, and when load may make sample bias load-bearing, influence test essence Degree, most of existing equipment are non-dismountable formula, it is therefore necessary to design a kind of strain-type unconfined compression apparatus.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of strain-type unconfined compression apparatus, being capable of quick obtaining The compression strength of soil and each physics relevant parameter can also easy to disassemble and transports.
A kind of in order to solve the above technical problems, the technical scheme adopted by the utility model is: strain-type is without confined compression Instrument, including bottom plate and bracket, bottom plate are equipped with pressing mechanism, and pressing mechanism includes driving motor and lifting device, driving motor It being electrically connected with lifting device, driving motor is connected with power switch, and lifting device is connect by the first pressure transmission bar with lower bearing plate, Upper bearing plate is fixed on bracket by the second pressure transmission bar, and upper bearing plate is located at the surface of lower bearing plate;
Upper bearing plate bottom surface is fixedly connected with pressure sensor, and displacement meter is fixedly connected on bracket, is terminated under displacement meter Contact that lower pressure-bearing plate top surface, signal adapter are connected with the pressure sensor and the displacement meter by conducting wire, signal conversion Device signal output end is connected with display screen.
In preferred scheme, laser alignment instrument is equipped between upper bearing plate and lower bearing plate.
In preferred scheme, the first pressure transmission bar and the second pressure transmission bar are the pressure transmission bar that side is cambered surface.
In preferred scheme, the pressing mechanism is bolted on bottom plate.
The utility model can be realized the intelligence of test process, improves test accuracy and reduces laboratory technician's working strength, The detachable of cabinet is realized additionally by laser alignment instrument, equipment mostly utilizationization is realized in the case where meeting experimental condition, The utility model structure is simple, and Operation and Maintenance also facilitates, be capable of quick obtaining soil compression strength and each physics relevant parameter.
Detailed description of the invention
The utility model is described further with reference to the accompanying drawing:
Fig. 1 is the structure composition schematic diagram of the utility model.
Fig. 2 is the relative position schematic diagram of the utility model laser alignment instrument and lower bearing plate.
In figure: bottom plate 1, bracket 2, pressing mechanism 3, driving motor 4, power switch 41, lifting device 5, lower bearing plate 6, Upper bearing plate 7, pressure sensor 8, the first pressure transmission bar 9, the second pressure transmission bar 91, displacement meter 10, signal adapter 11, display screen 12, laser alignment instrument 13, bolt 14.
Specific embodiment
As shown in Figure 1 and 2, a kind of strain-type unconfined compression apparatus, including bottom plate 1 and bracket 2, bottom plate 1 are equipped with pressuring machine Structure 3, pressing mechanism 3 include driving motor 4 and lifting device 5, and driving motor 4 and lifting device 5 are electrically connected, and driving motor 4 connects It is connected to power switch 41, lifting device 5 is connect by the first pressure transmission bar 9 with lower bearing plate 6, and upper bearing plate 7 passes through the second pressure transmission Bar 91 is fixed on bracket 2, and upper bearing plate 7 is located at the surface of lower bearing plate 7;
Upper 7 bottom surface of bearing plate is fixedly connected with pressure sensor 8, and displacement meter 10, displacement meter 10 are fixedly connected on bracket 2 Lower end touches lower 6 top surface of bearing plate, and signal adapter 11 passes through conducting wire phase with the pressure sensor 8 and the displacement meter 10 Even, 11 signal output end of signal adapter is connected with display screen 12.Mobile displacement meter when installation, so that the probe of displacement meter is just Contact the upper surface of lower bearing plate, when measurement, which automatically records, to be read and show on a display screen by signal adapter.
In preferred scheme, laser alignment instrument 13 is equipped between upper bearing plate 7 and lower bearing plate 6.Pass through laser when installation Centering instrument debugging pressing mechanism makes lower bearing plate and upper bearing plate to just, and adjustment sample position to be located at pressure-bearing at sample center On plate central axis.
In preferred scheme, the first pressure transmission bar 9 and the second pressure transmission bar 91 are the pressure transmission bar that side is cambered surface.Cambered surface Design can effectively prevent stress concentration damage pressure transmission bar by pressure.
In preferred scheme, the pressing mechanism 3 is fixed on bottom plate by bolt 14.Being bolted conveniently to tear open It unloads and shifts.
Embodiment 1:
Vaseline is smeared at the sample both ends prepared before experiment, reduces moisture evaporation.Sample is placed on lower bearing plate On, it turns on the power switch, driving motor is started to work, and sample position is adjusted, so that sample top just touches pressure sensing Device.Displacement meter at this time is adjusted, so that displacement meter lower end is just struck against lower bearing plate.The present embodiment chooses the 2% of specimen height As unit displacement, choose specimen height 20% be used as displacement limits.Experiment starts bearing plate extruded sample at present, makes to pressurize Suspend the work of driving motor when telescoping rod axial displacement is the 2% of specimen height, display screen shows that pressure sensor detects Data record displacement meter reading simultaneously, continue to turn on the power switch, reach and suspend experiment after 4% strain, repeat above-mentioned step Suddenly, display shows the data of the displacement meter being collected into and pressure sensor in the form of chart obtains, and reaches to test specimen institute Bear the real-time display of pressure value and the effect of monitoring.Stop test when pressure sensor transmission data have shown peak value. Stop test when strain reaches the 20% of specimen height if there is not peak value.Remove sample after experiment, Dishwasher, Subsequent operation is carried out again.

Claims (4)

1. a kind of strain-type unconfined compression apparatus, it is characterised in that: including bottom plate (1) and bracket (2), bottom plate (1), which is equipped with, to be added Press mechanism (3), pressing mechanism (3) include driving motor (4) and lifting device (5), and driving motor (4) and lifting device (5) are electric Connection, driving motor (4) are connected with power switch (41), and lifting device (5) passes through the first pressure transmission bar (9) and lower bearing plate (6) Connection, upper bearing plate (7) are fixed on bracket (2) by the second pressure transmission bar (91), and upper bearing plate (7) is being located at lower bearing plate just Top;
Upper bearing plate (7) bottom surface is fixedly connected with pressure sensor (8), is fixedly connected on bracket (2) displacement meter (10), displacement Meter (10) lower end touches lower bearing plate (6) top surface, signal adapter (11) and the pressure sensor (8) and the displacement meter (10) it is connected by conducting wire, signal adapter (11) signal output end is connected with display screen (12).
2. a kind of strain-type unconfined compression apparatus according to claim 1, it is characterised in that: upper bearing plate (7) He Xiacheng Laser alignment instrument (13) are equipped between pressing plate (6).
3. a kind of strain-type unconfined compression apparatus according to claim 1, it is characterised in that: the first pressure transmission bar (9) It is the pressure transmission bar that side is cambered surface with the second pressure transmission bar (91).
4. a kind of strain-type unconfined compression apparatus according to claim 1, it is characterised in that: the pressing mechanism (3) is logical Bolt (14) is crossed to be fixed on bottom plate.
CN201920270501.XU 2019-03-04 2019-03-04 A kind of strain-type unconfined compression apparatus Active CN209727628U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920270501.XU CN209727628U (en) 2019-03-04 2019-03-04 A kind of strain-type unconfined compression apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920270501.XU CN209727628U (en) 2019-03-04 2019-03-04 A kind of strain-type unconfined compression apparatus

Publications (1)

Publication Number Publication Date
CN209727628U true CN209727628U (en) 2019-12-03

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112485302A (en) * 2020-11-17 2021-03-12 中国科学院武汉岩土力学研究所 Method and device for measuring anisotropy in soil body compression process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112485302A (en) * 2020-11-17 2021-03-12 中国科学院武汉岩土力学研究所 Method and device for measuring anisotropy in soil body compression process

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