Large Direct Shear Test Device
Large Direct Shear Test Device
Large Direct Shear Test Device
Large Direct Shear Test Device
Large Direct Shear Test Device
Large Direct Shear Test Device
Large Direct Shear Test Device
Large Direct Shear Test Device
- Description:
Large Direct Shear Test Device
- Model:
Large straight shear
- Manufacturer:
APS-WILLE Geotechnik
Product Information
  • Description
  • Standard
  • Feature
  • Specification
  • Software
  • Upgrade Option
Description

全自动大型直剪仪

Germany wille The automated large direct shear apparatus has been designed and manufactured according to version of current testing standards (ASTM,ISO, EN and DIN) and manufactured by high quality of mechanical and electronic parts. This  quality makes it unique to produce repeatable test results.


The device determines the internal friction of construction materials e.g. soils, aggregates, gravels, geomembranes, geotextiles, GCL(Geosynthetic clay liner), recycling rubble Brick rubble, Colliery spoils, and industrial slag. The interface friction parameters between different construction material could be also determined by the device e.g. geotextile /soil, geotextile /concrete, asphalt/concrete, geogrid/soil and etc.


This floor mounted direct shear device is an automated apparatus to test large samples of300x300mm or 500x500mm and 1000x1000mmsizes. It has variety range of axial and shear loaded up to 250kN and even larger loads for1000x1000mm sample size. The set-up of the test parameters can be done either via the front operational panel which includes of control buttons and function keys with LCD display or directly by software. GEOsys software in combination with this unit performs all your tests automatically and without operator assistance during the test period.


This large direct shear apparatus measures the force developed during the relative displacement of two surfaces subject to normal stress or internal shearing of soil in accordance with international standards. In the Direct shear test a cuboid or circular specimen is installed in a shear box which consist of two parts and subjected to vertical and horizontal stresses. The lower shear box is moving against the upper one therefore a shear surface would be generated, in which a shear stress builds up. The shear box prevents the sample to have lateral expansion.

大型直剪仪

System Geography

① Axial force Electromechanical actuator

② Shear force Electromechanical actuator (Inside - Invisible)

③ Electronic and Control Unit (Inside - Invisible)

④ Main Switch and front operating panel

⑤ Moveable Gantry

⑥ Stiff framework

⑦ Upper Shear Frame

⑧ Lower Shear frame

⑨ Water container

⑩ 4 off axial displacement transducers

⑪ Shear force load cell (Invisible)

⑫ Axial Force load cell

⑬ compression Spring for compensating of the weight of upper shear box (2 off)

⑭ Locking brake


Large Direct Shear Test Device

The device has two electromechanical for ceactuators includes of stepper motor and gearbox which applies normal stress and shear stress on sample with closed loop control function means each axis would be controlled in displacement(strain or velocity) mode as well as load control mode. The apparatus with reversible electromechanical motor gives the possibility to run residual strength test.
The device has rigid construction which the unwanted deformation of any parts during the tests. The device has a special floating frame construction to compensate wall friction influences and compensation of tilting. The Lower part of shear box is locating on a frictionless preloaded bearing and moves with the friction just in horizontal direction in dependent from axial load.

This device eliminated the manual loading for dead weights or pneumatic version which needs air pressure for operation.


The main advantage of device is an accurate testing of specimen without tilting and friction between shear box components (e. g. load piston, upper shear box, lower shear box). The normal stress and the shear stress are closed loop controlled by an electromechanical drive system. It has a Closed-loop control of normal stress by comparing the effective stress in the shear gap with the rated value.


大型直剪仪

The apparatus has a movable gantry which slides the axial force actuator to right side of device to provide convenient and free space for operator to handle the shear box/es and set up it for testing from above. The easy handling of this mechanism is guaranteed. The locking brake fix this mechanism at the desired place either at test point or at sample set up point and prevent any horizontal movement.

大型直剪仪

Shear Box

The complete shear box system is made of stainless steel and is designed to contain water that surrounds the specimen and allows the specimen to be submerged for saturate conditions. The shear box consists of lower and upper shear boxes with rigid wall either in round or square shape, adaptor loading pad, two porous plates, load piston and water container for saturated conditions.

The stainless-steel shear box system is prevented completely against tilting, consists of a moving lower shear box comes with friction free linear guides and moves with the small friction just in horizontal direction. The upper shear box is vertically floated, and weight compensated and fitted to parallel linear bearings. It can be also fixed at its place as well.


The spacing between the upper and lower shear boxes (shear gap) is adjustable and can be adjusted continuously up to 35 mm. The weight of the floating upper shear frame and the upper shear box can lead to measuring errors during test cycles. Therefore, their mass is transferred directly into the machine’s framework by using two compression springs located at two sides.

The design of the equipment allows the sample to be compacted without damaging the measuring devices. The shear boxes are removeable from testing position and after compaction and preparation of sample would be moved back to testing place at frame again. The shear boxes have adapters which enables to reduce the sample size or even the shape of sample into circular one which showed in below pictures.

大型直剪仪

大型直剪仪    大型直剪仪

大型直剪仪    大型直剪仪

SIEMENS Industrial Controller

The operation of the device requires the direct input of numerical values besides the use of the function keys. The control element made by Siemens Company is an advanced control panel which allows the user to enter the numerical values and control the system by other function keys easily. You need just to enter the values and press the run Key to start the operation.

The operator panel gives the user access to all functions in the operation and service menu. This enables the user to start and run the pump as well as conduct calibration if needed. These controls are instinctive and simple to use. All functions, such as actual status, flow rate and information on the pressure pumping ramp can be seen on the LCD display on the front of the device.

大型直剪仪

Main Features

• Graphic display including 10 input membrane keys

• Setting force or position manually

• CE mark

• Ethernet interface

• 22 available different languages

• Multi language menu navigation

• Calibration function

• 4 free analogue Ports with A/D converter (interface+ /- 10 VDC)

Standard

• ASTM D-3080 

• ASTM D-5607 

• ASTM D6243 / D6243M - 20  

• BS 1377-7  

• ISO 12957-1:2018  

• CEN ISO/TS 17892-10  

• JGS 0560  

• JGS 0561


Feature

• High stiffness robust design

• Axial and shear load up to 250kN

• Removable shear box made of stainless steel for testing high corrosive materials

• Cylindrical or square sample shapes up to1000mm

• Stainless steel water receiver for sample saturation

• Free floating upper shear box or stepless adjustment of the shear gap from 0-35mm

• Residual shear tests

• Creep Tests Module(optional)

• Cylindrical or square sample shape

• Front operational control panel with membrane keypad for easy test set up

• Safety functions to prevent overload and overtravel

• Closed loop controlled normal and shearstress

• Real-time data and graph display

• Ethernet Port for fast data transferring to PC

• High quality industrial controller with displayer and membrane keys or Touch panel andgraphic display for monitoring of measured values and test procedures

• Manual control or by software/PC

• Compatible to LABVIEW©

• Flexible controlling software for nearly unlimited test procedures of all test options

• Different upgrading options are available onrequest i.e. for geotextile applications

Specification
DescriptionTechnical Specification
Load typeElectromechanical
Normal force60 / 100 / 125 /200 / 250kN
Shear force60 / 100 / 125 /200 / 250kN
Sample size300x300mm 500x500mm


Software

GEOSYS Software

GEOsys is a multi-functional and modular controlling and data acquisition software in Windows. It allows for the simple programming of complex user defined test sequences via structured Windows instructions on a graphi cuser interface.

GEOsys utilizes a flexible, programmable system that controls test appliances that coordinate various test operations. The flexible operating panel provides tools to configure the appliance,  editors to carry out load procedures, and functions for analysis, presentations and logs. The software is designed to support a modul arstructure for the test environment so as to enable a flexible configuration and thus fulfil the specific requirements of the company.


The important key feature of this software is the ability to allow users to simply and freely program standard or complex test sequences with structured Windows operations via a graphic user interface.

Thanks to the wide range of abilities Geosy soffers, it is not only compatible with our products, but it can also be used with hardware from other manufacturers, providing data acquisition and test controlling for hard- ware of a similar or more advanced standard.

全自动大型直剪仪

Main Features

• Unique platform to address all testing needs, be it soil, asphalt, rock or construction related, both dynamically and statically

• Controlling and data acquisition software

• Simultaneous loops for all connected actuators

• Free programmable Test Sequence Control and Formula Editor (upgrade version)

• Complete real-time data-acquisition and closed- loop control for each channel using real parallel configured channels

• Flexible and user-friendly

• Supporting functions of similar manufacturer Options concerning data conversion in ASCII

• Digital setting of PID Parameters (parameter optimizing or tuning depending on the material) even during operation

• User roles (administrator, service, developer, lab assistant) for easy handling – decreasing the likelihood of errors

• OS platform independent software (e.g. available for WINDOWS, LINUX or MAC OSX)

• Ability to allow users to simply and freely program standard or complex test sequences with structured Windows operations via a graphic user interface

• Suitable for up to any number of simultaneous and independent real-time, closed-loop controlled channels, machines, or test devices, such as axial load, confining pressure, pore water pressure, as pore air-pressure

• Management of hardware components User supplied, calculated measurements

• Languages: English, German, Russian, Chinese, Polish and etc


Soil Large Direct Shear Test Module

GEOsys is designed for closed-loop controlled static & Dynamic tests for all test applications in materialtesting, such as stress-controlled, strain-controlled, any kind of waveforms like sine, rectangle, triangle,and predefined waves.

The software allows to run direct shear tests on cohesive and non-cohesive soils as well as direct sheartests on soil-geosynthetic interfaces. It is controlling and data acquisition software and also has different modules to run tests according toASTM or other standard methods. Depends on the requirement of the customer one or several moduleswould be delivered with main software, such as:

• Data Acquisition, processing and device management (DPD) Module

• Consolidation Stage (Single stage, multiple stage or over consolidation mode)

• Step or ramp axial force

• stress or strain ramps during consolidation and multistage shear tests

• Static Direct Shear module  *Constant Normal Stress test  *Constant Normal Height test  *Constant normal stiffness test (CNS)  *Shear stress-controlled test  *Shear displacement control (forward and reverse)  *Calculation of shear stresses  *Creep test  *Pull-out test (Hardware required)

全自动大型直剪仪

Upgrade Option

• Geotextile/ Geosynthetik Testing (Upgrading Feature)

There are different upgrading options which are required to determine friction behaviour of layers between geosynthetics and building materials for example set of grips or clamps for upper and lower shear box, some filling plates, gluing-plates for geomembranes. Grooved clamping bars can be mounted on all four sides on the upper and lower boxes to fix geotextiles,geo-tiles, geo-grids or plastic sheets.

大型直剪仪

• Pull Out Test (Upgrading Feature)

The frictional characteristics of a soil-geosynthetic interface can be determined by direct shear and pullout tests while soil–geosynthetic interaction parameters and their determination play important role inthe design of reinforced soil structures. The large direct shear test can be upgraded to run pull out test on the same sample size of main devicefor evaluating the soil–geosynthetic interaction parameters under pullout, but this upgrading order ndde placed before starting of construction. This upgrading increases the length of the main directshear device.

大型直剪仪