삼축압축시험기 시료 설치 부품, GDS시험 module

삼축압축시험기 시료 설치 부품

3 part split mould , 2 part split mould, Suction sleeve stretcher

membranes O-rings Porous Disks

 

Soft Soil Membrane Placement Jig 삼축압축시험 Membrane 설치기

불포화토 high air entry porous disk (HAEPD)

HAEPD는 공기와 물의 경계면에서 공기 압력을 유지하는 장치로 삼축셀 시료 하단에 설치

air-entry value 는 HAEPD 하단의 물 압력 xkPa 상단의 공기압력 (x+y)kPa에서 y이다.

삼축셀 top cap 부품

standard sizes 38mm, 50mm, 70mm, 100mm and 150mm

Top Cap for Drained Testing, Top Cap for Undrained Testing

Extension Top Cap , Vylastic Sleeve

미소변형 측정장치

True soil strains can be masked by deflections which originate in the compliances of the loading system and load measuring system. Such equipment compliance errors add to a variety of sample bedding effects to give a poor definition of the stresss-train behaviour of the material under test, particularly over the small strain range. Most triaxial tests therefore tend to give apparent soil stiffnesses far lower than those inferred from field behaviour (Jardine, Symes & Burland, 1984).

 

Hall Effect Transducers (HE) small strain measurement 수직 2개 수평 1개 측정

LVDT Local Strain Transducers

GDS Bender Element System (GDSBES) maximum shear modulus G.

GDS Bender Element Core Holder 시료의 S waves P waves 측정

linear potentiometers

Body diameter 19mm. 범위 25, 50mm

Digital Indicator

연결 Digital Indicator Multiplexer (DI Mux)나 USB로 컴퓨터 연결

encoder 형식으로 strain gauge 형식의 full scale output에 영향을 받지 않고 encoder의 정확도에 영향을 받는다.

내부 로드셀 submersible load cell

submersible load cell은 구속압의 압력의 영향에 관계없다. 셀 외부 로드셀 경우 구속압과 마찰력에 대한 ram의 보정이 필요하지만 submersible load cell은 없어 하중제어 응력제어 Ko시험시 로드셀 측정값에 의한 제어되어 반드시 필요하다.

차등압력측정 wet wet differential pressure transducer 수두 차이로 체적측정

불포화토의 시료 체적변화 측정 (HKUST method), 공내재하시험시 체적측정

S-Beam load cells 삼축셀 외부 로드셀

시료의 횡변형 측정 laser profilers

laser를 삼축셀 외부에 설치하여 80mm 시료에서 떨어저 시료 길이 32mm의 횡변형을 측정한다.

The laser profilers have an accuracy : about ± 10μm in optimal conditions of measurement.

GDS Force Actuator (GDSFA) 다기능 하중 변형 제어 하중 장치.

간극수압 센서 pore water pressure

GDS Standard Pressure/Volume Controller (STDDPC) 압력 체적 제어장치

3MPa 200cc 표준 선택 주문 100kPa to 4MPa

GDS pneumatic controller 공기압 제어 장치

RS232 computer controlled regulated air pressure control로 에어 컴푸레셔 필요.

advanced pressure controller (ADVDPC)

8MPa to 150MPa, volumetric capacity of 200cm3. 물, oil, 공기 사용.

GDS Infinite Volume Controller (IVC) 연속 체적제어 장치

표준 pressure/volume controller의 체적이 200cm3로 체적변화가 많은 경우 2개의 GDS pressure/volume controllers를 평행으로 연결하여 연속적으로 압력을 가한다.

GDS Consolidation Constant Rate of Strain cell (CRS)

배압을 가하고 간극수압측정이 가능한 1 차원 압밀장치

GDS Automatic Oedometer System (GDSAOS) 자동 재래식 압밀 시험기

대구경 CRS 압밀 셀 large diameter consolidation cell 시료규격 500mm.

GDS 250kN load frame 필요.

공진주 시험기 resonant column apparatus.

GDS Shearbase System (GDSSS) simple shear 직접전단시험기

simple shear와 직접전단 direct shear 부품교환으로 가능

GDS combined Advanced Dynamic Cyclic Simple Shear (ADVDCSS)

진동 정적 삼축시험과 진동 Simple Shear 겸용기

Dynamic Back Pressured Shearbox (GDSBPS) 배압 간극수압 측정 진동 가능한 직접전단기

지진 시 사면 붕괴 (불포화토 가능)

High Pressure Back Pressure Shearbox (HPBPS) 배압 간극수압 측정 진동 가능 직접전단기

암반사면 100kN 전단력 배압 10MPa

삼축셀 압석용

시료직경 32/100mm 압력 14-100MPa balanced ram 선택.

GDS Virtual Infinite Stiffness loading system (GDSVIS)

용량 100kN, 250kN, 400kN 500kN.

500kN Virtual Infinite Stiffness loading system (GDSVIS)

상부 빔과 셀을 유압으로 상하 이동

GDS Enterprise Level Dynamic Triaxial Testing System (ELDYN)

beam mounted electro-mechanical actuator.

Advanced Dynamic Triaxial Testing System 기계식 진동 삼축시험기

(MINIDYN for 5Hz or less and a MAXIDYN when configured to 10Hz)

GDS Hydraulic Loading Frame (GDSHLF) 유압식 정적 진동 삼축시험기

입경이 큰 진동 삼축시험, 철도교량

GDS 50kN load frame 정적 삼축시험

GDS Triaxial Automated System (GDSTAS) 재래식 정적 삼축시험장치

삼축셀

GDS transducer access ring, 12 ports, 직경 76mm to 300mm.

GDSLAB

Data Logging 측정 저장만 (sw module1) data acquisition software kernel.

삼축 압밀 Consolidation (SATCON)

Cell and back pressure control for saturation (stepped to BS standards ramp 점증증가),

Advanced Loading (sw_module5)

Independent user control over the axial (load, stress or strain), radial and back pressure axes with control options of constant value, ramp or quasi-static sinusoidal cyclic applied separately to each axis. 축 구속압력, 배압 응력이나 하중 제어

K-zero Controlled Consolidation / Swelling (sw_module6)

배수량을 측정하여 수평직경 일정하게 압밀

Triaxial Permeability Evaluation 삼축 정수위 변수위 투수시험

불포화토 시험 연직, 구속응력, 공기압, 배압 (4개 압력) 의 제어

Unsaturated Tests using Axis Translation(공기압-배압)-4D Stress/Strain Path (sw module8)

진동 삼축시험 Dynamic Triaxial Tests (sw module9)

재래식 압밀 시험 Oedometer Logging (sw module10)

시간의 선형이나 square-root, log time으로 변형 저장

압밀 Consolidation (CRS 정변위, Rowe, Rowe and Barden) (sw module11)

B-check, saturation, constant stress, traditional stepped loading test, constant rate of strain and constant rate of loading tests.

표준 전단시험 Shear Testing (Standard) (sw module12)

Shear Testing (Advanced) (sw module13)

Independent control over the axial axis (load, stress or strain) and shear axis (load, stress or strain) with constant, ramp or quasi-static sinusoidal cyclic control on either axis.

진동 단순 전단시험 Dynamic Simple Shear (sw module14)

Test control of dynamic axial load or axial displacement, and dynamic control of torque or rotation.

HCA Generalised Stress Path (sw module15)

independent linear control of p, q, b, alpha under stress or strain control.

HCA Advanced Loading (sw module16)

Allows quasi-static independent control of the five axes; Axial (load, stress, strain, deformation), Rotational (torque, rotation), Outer Cell pressure (kPa), Inner Cell pressure (kPa) and Back pressure (kPa) using either constant, ramp or slow speed sinusoidal control.

 

HCA Dynamic Loading (sw modules17) 연직 진동

High speed dynamic cyclic testing with high speed data acquisition. Test control of dynamic axial load or axial displacement, and dynamic control of torque or rotation. Optional dynamic control of inner and outer cell pressures depending on system specification.

GDSTTA Dynamic Loading Module

Dynamic test control of x and y axes, with static stress control of the z axis.

GDSTTA Advanced Loading Module

True Triaxial specific advanced loading module for independent control of the 3 axes. Axial and horizontal control by load, displacement, stress or strain, and the third axis controlled by stress (i.e. pressure). Constant True Triaxial B function may also be maintained using this module.

Bender Element sw gdsbes

Resonant Column apparatus GDSRCA (sw gdsrca)

Test capabilities include automation of resonance in torsion, resonance in flexure, damping by free vibration in torsion and flexure, and slow speed torsional shear (TS) tests.

SASW Spectral Analysis of Surface Waves Software (sw sasw)

stacking (in time or frequency domain), trigger input (electrical or manual), Fast Fourier transform with display of phase, magnitude and coherence functions and enables the user to view during a test the dispersion curve created.

CSWS Continuous Surface Wave System Software (sw csws)

The user enters a range of frequencies for the test, and the software will precisely regulate the inertial vibrator at each specified frequency, while automatically producing a dispersion curve by performing a Fast Fourier Transform on the data at each frequency. Time domain and frequency data may be saved.