The data are also compared with the k0 measured by triaxial k0 consolidation tests. Multientity and global consolidations sage intacct. Plaxis 2d tutorial lesson 5 road embankment, consolidation. Effect of specimen size on triaxial k0 consolidation. Humboldt material testing software hmts provides a complete solution for the acquisition, recording and presentation of test data, as well as controlling testing operations when used in conjunction with compatible humboldt testing equipment. Gibbs engineering laboratories branch design and construction division. Sbs makes managing financials for multiple locations intuitive.
Many organizations fail to plan the consolidation strategy and wind up investing in failed projects. K0 kzero, multistage testing, oedometerconsolidation, constant head. Initial compression primarily caused by preloading. Clisp studio stress path software module the vj tech clisp studio stress path software module enables the user to perform one or more consolidated undrained or consolidated drained stress path tests to attain a required stress point. Secondary consolidation and the effect of surcharge load. The compression curves in a triaxial k0 consolidation tests almost match an oedometer test. The worlds leading software for threedimensional soil settlement analysis. Consolidation accounting financial consolidation software sbs. Experimental study on k0 consolidation behavior of. A strategy thats always in style application consolidation should never go out of style. A k0consolidation test using triaxial testing apparatus and a flat dilatometer were performed to investigate the k0 value for peat ground in hokkaido, japan. Simulation and video software development for soil. The software simulates the consolidation experiment and poses a number of content oriented multiplechoice questions on the numerical, theoretical and application aspects of the test.
Anisotropically consolidated undrained compression test on residual soil. The exact cause of secondary consolidation is unknown, but is possibly a readjustment of the double water layer surrounding the clay particles. Soil consolidation refers to the process in which the volume of a saturated partially or fully. Jun 26, 20 the founders of this new software solution are the original founders of hyperion and bpc, so they understand the limitations of current solutions on the market and have worked to redesign the planning, consolidation and reporting tool to fit current technology and business requirements. The gds consolidation system can become a gds stress path triaxial testing system by changing the test cell, adding a further 200cc pressurevolume controller and triaxial software modules. It consists of different tabs with selfexplanatory notes and guides taken from the international standards and based on the findings of reliable researchers and universities in the world. A series of k0consolidation tests in a triaxial cell was carried out for marine clays.
Web track gives you access to the popular bistrack system from epicor software corporation. Therefore, torsional shear tests were conducted on specimens consolidated and swollen in different directions to evaluate the anisotropy of undrained shear strength. Behavior and properties of natural soils and soft rocks. Our company has been using geosystem software products since 1996 beginning with the dos version of ld for borings. Test management software supplied including calibration facility. The gds consolidation constant rate of strain cell crs is designed primarily for advanced commercial testing laboratories who want to reduce the time required to complete a consolidation test.
An increase in the layer thickness leads to a decrease in the total head gradient during the stage of pore water expulsion. Compression in a broader sense compression of soil comprises the volume reduction due to compression of constituent materials soil particles, pore water, pore air, etc. In this section, we consider only that due to consolidation. Anisotropically consolidated undrained compression test on. Using application consolidation to eliminate redundancies has long been a favorite target of it leaders because it demonstrably reduces it costs. Toda, most of the commerciallyavailable cpt rigs operate electronic friction cone and piezocone penetrometers, whose testing procedures are outlined in astm d5778, adopted in 1995. Secondary consolidation usually estimated from a lab consolidation test. Financial consolidation and reporting applications deliver a consolidated book of record.
During preliminary testing program, initially k0 was selected as 0. Humboldts software downloads, drivers and other support materials. The vertical displacement can be manually entered into these columns. Application consolidation is not just pairing up applications that seem similar. In malaysia, the shear strength and corresponding deformation characteristics of residual soils are normally investigated by isotropically consolidated undrained ciu triaxial test. Conventional triaxial testing systems include of closedloop controlled load frame, hand operated or automatic pressure controlling units, volume measuring, controlling and data acquisition system with related transducers and different software solutions. The test is conducted to determine the settlement due to primary consolidation. Anisotropy of undrained shear strength induced by k0. Axial stress ramps with closedloop control of radial stress to maintain the k0. Ppt consolidation test and data analysis daniel ward. The consolidation software has different data recording columns each assigned to the consolidation cells and they can be. Also, an oedometer test is carried out at the same time. To perform an elastoplastic finite element fe analysis, it is important to accurately determine the initial stress conditions, and among them, the value of the coefficient of earth pressure at rest k 0 value is particularly important. This series of conventional triaxial testing systems include of closedloop controlled load frame, hand operated or automatic pressure controlling units, volume meas.
Development of a laboratory procedure to evaluate the. Consolidation testing of non aqueous phase liquid napl conta minated sediments. K0 consolidation table time, pwp input, load input, cell pressure input, strain input, back pressure input, midpwp input, axial strain, current diameter, effective mean stress, deviator stress stress path table time, pwp input, load input, cell pressure input, strain input, back pressure input,axial strain, total stress, shear stress, normal stress, deviator stress. Consolidation effects of sample disturbance oc clays figure 7. In an oedometer test, a series of known pressures are applied to a thin disc of soil sample, and the change of sample thickness with time is recorded. The test data show that the k0 values measured for. It uses commercial software that applies a ramp of radial.
This software can be enhanced with the consolidation, test specific module, hm5100sw, to provide calibration, data acquisition and report generation for those using a computer to control consolidation testing operations. Used by top geotechnical engineers for civil projects around the world, settle3 is a simple yet sophisticated program that helps you analyze vertical consolidation and settlement under foundations, embankments, and surface loads. All parts with direct sample contact in stainless steel or a titanium k0 ring. Direct stress control on specimen via either a flexible porous disc constant stress or rigid porous disk constant strain.
Coefficient of earth pressure at rest for normally and. Whether your company operates in a single location with multiple departments, or multiple locations with numerous divisions, our consolidations software will effortlessly perform all of your financial reporting. Gds constant rate of strain cell crs in load frame type. A consolidation test record should have multiple consol readings records. This allows the consolidation characteristics of the soil to be quantified in terms of the coefficient of consolidation and hydraulic conductivity. Gdslab starts with a core application known as the kernel.
Instantly set up new entities with configurable rules for interentity transactions, bank accounts, and more. Versatile fully automatic oedometer soil consolidation testing machine by wykeham. The test data show that the k0 values measured for specimens prepared. K0 triaxial consolidation is carried out to verify the result of purposed method. Due to the flexibility of the software, each triaxial system can either have its own.
Suitable for compression tests with constant or continuous loading tests with radial stress and optional pore water pressure measurement. The crs cell fits either a new gds or existing load frame in place of a triaxial cell. Other options include running constant rate of consolidation, unconfined compression and triaxial on a 50 mm 2. The clisp studio csdynadssc module is an addon to the core package cshost that makes it easy for you to setup, control and monitor a dynamic simple shear with confining pressure test in soil testing laboratories, and collate and output the results in industry standard or your own defined format. A strain path controlled triaxial apparatus is used in a series of experiments. The basis of this test is that a sample radially constrained is axially loaded and the change in. However, few experiments evaluating the effects of anisotropic consolidation on undrained shear strength have been available for practical construction problems. The autotriax 2 software is a comprehensive and userfriendly interface between the operator and the testing system. Plaxis solved time interval specified for k0 phase. K0consolidation in a triaxial cell and evaluation of insitu k0 for. Triaxial test automatic control and processing softwares.
But financial consolidation and reporting applications also help organizations with. The hardening soil model is an advanced model for the simulation of soil behaviour. Gdscts the gds consolidation testing system gdscts is a stateoftheart, fullyautomated consolidation testing system designed for soil. K0 consolidation consolidometer tc29 workshop on current practices of the use of bender element technique a in the drained condition, increase the. The one dimensional consolidation test is the commonly used test of this type in a laboratory due to the relative ease of the test procedure and simplicity of the test equipment. Estimating foundation settlement by onedimensional consolidation tests denver, colorado march 1953. Autotriax 2 can perform different kind of triaxial tests such as. Also, the specimen size is not associated on triaxial k0 consolidation test results of clays. Insitu test calibrations for evaluating soil parameters p. Consequently a lower rate of consolidation will result. For consolidation work k0 may be defined for a soil with a history of onedimensional strain as the ratio. Experimental study on the saturated compacted loess.
K0 consolidation cells with radial stress measurement. If consolidation test data is not available, the primary settlements can be estimated using geotechnical. Oedometer an oedometer consists of a confining ring housing a tested soil sample and a top cap with a porous stone through which pore water can escape. Triaxial test cd mohr circle soil mechanics eurocode.
Dec 21, 2009 demonstration of sample preparation for consolidation test in a loadtrac ii machine. Ngi for handling very soft clays or other difficult. The autotriax 2 is an advanced triaxial testing system that can automatically perform up to 6 entire and independent tests at the same time, from start to finish, without any human intervention. As for the mohrcoulomb model, limiting states of stress are described by means of the friction angle phi, the cohesion c and the dilatancy angle psi. The user can determine and assign different time intervals or select fixed time intervals and stresses for the calculation of the consolidation test data. The software provides full control on alfas triaxial tester t333a. On the use of soil drained and undrained parameters. The software features full reduction of time consolidation data, including both square root and log of time methods. Time consolidation test data for each increment of load. The oedometer test is classical in soil mechanics for obtaining. Next basic software is included with the humboldt consolidation machines and humboldt data loggers.
Soil consolidation construction testing equipment pcte. As we have studied in week 1, only the vertical stress is known in an oedometer. It uses commercial software gdslab which applies ramps of radial stress with back volume measurement. A k 0 consolidation test using triaxial testing apparatus and a flat. Blackline consolidation integrity manager automatically reconciles accounts where the balances tie out and highlights exceptions, meaning users only have to worry about a fraction of the consolidation reconciliations each month, dramatically reducing the time spent on this process. Standard triaxial straincontrolled shearing, k0 consolidation, permeability, stress paths qp and st linear paths, advanced loading, 4d unsat stress paths for unsaturated soil. A triaxial shear test is a common method to measure the mechanical properties of many deformable solids, especially soil e.
This happens because soil is a twophase material, comprising soil grains and pore fluid, usually groundwater. They provide audit trails and permanent storage of the consolidated results so that internal and external auditors can test and verify data. Use this field to assign which phi value is used in the calculation of k0 1sinphi ocrsinphi this determines the k0 1 calculation. The secondary consolidation portion of the consolidation curve is approximately linear on an elog time plot. Triaxial test automatic control and processing softwares autotriax 2.
The test devices are suitable for standard triaxial tests, isotropic or anisotropic. Plan for application consolidation infotech research group. The vertical load may be applied by dead weights, pneumatic pressure, motor, etc. In combination with wille geotechnik load frames and software modules suitable for different consolidation tests, such as fully automatic il, cl, crs, cg or swell tests. Im interested in an adhoc solution as opposed to a full upgrade to a new software company. Gds consolidation testing system rowe and barden type product code. Effects of anisotropic versus isotropic consolidation in. Gdslab is the control and data acquisition software for geotechnical laboratory applications.
Total and effective stress tests as uu unconsolidated undrained, cu consolidated undrained and cd consolidated drained in. However, soil stiffness is described much more accurately by using three different input stiffnesses. The vj tech clisp studio rowe software module enables the user to perform a rowe cell consolidation test to determine the magnitude and rate of consolidation of a sample using hydraulic vertical load. Gds consolidation testing system rowe and barden type. In combination with wille geotechnik load frames and software modules suitable for different consolidation tests. Coefficient of primary and secondary consolidation, void ratios, compression and recompression indices, preconsolidation and swell pressures, t 0, t 50, t 90 and t 100, and swellcollapse percentages are calculated and reported.
K0consolidation in a triaxial cell and evaluation of in. Peat sample taken from southern highway project colombo, sri lanka is used for laboratory tests. Sage accounts production cant accommodate the group structure. The pressure values should increase, and then also include the. Mayne geosystems engineering group, georgia institute of technology, atlanta, ga, usa abstract. The resarch program continoues authors experiences with. Construction of road embankment on soft soil with high groundwater level lead to an increase in pore pressure. Pdf anisotropically consolidated undrained compression test. Activation code for k0 test module with manual and automatic performance of k0 stages 29wfd1a2sw4. Gdslab software gdslab is the control and data acquisition software. Fundamentals of cone penetrometer test cpt soundings.
We are closely monitoring the changing situation with the covid19 virus outbreak. Using the profile of ocr obtained from a series of oedometer tests, the kvalue. Installed on a pc communicating with the system over a fast ethernet connection, the software can be used to configure the systems, calibrate transducers, specify test parameters, set system limits and control the system during a test, either manually or. Consolidation software recommendations by accounting. Consolidation parameter an overview sciencedirect topics. The gdslab kernel allows for data acquisition from your hardware, but no test control. The consolidation characteristics of finegrained soils are evaluated in the laboratory, on specimens taken from undisturbed soil samples. Unfortunately however in plaxis 2d ae internally still the specified time interval is stored for the k0 procedure phase. With our accounting software for multiple entities, you can have new entities inherit your existing lists, process definitions, and charts of accounts. K0 consolidation apparatusinclude pull rod strain controlled unconfining compression apparatus. Simply add the appropriate module or modules to complete the test suite functionality you require. When we were looking for a highly customizable software for our concrete testing and reporting, we considered geosystem software because of their excellent customer service.
The interpretation of insitu geotechnical test data needs a unified approach so that soil parameters are evaluated in a consistent and complementary manner with laboratory results. Installed on a pc communicating with the system over a fast ethernet connection, the software can be used to configure the systems, calibrate transducers, specify test parameters, set system limits and control the system during a test, either manually or automatically. The consolidation module provides tabulated test data, graphs and all test specific calculations in real time, allowing you to monitor tests in progress, generate test specific reports that include all graphs and data presented in a project and simultaneously run multiple tests on one computer, involving any of the available next modules and. To investigate the variation of k 0, the coefficient of lateral earth pressure at rest, with initial saturation degree s r and constant radial stress. This investigation examines effects of anisotropic versus isotropic consolidation in consolidatedundrained triaxial compression tests performed on specimens of two clays consolidated from a slurry in largediameter consolidometers. The gds consolidation testing system gdscts is a stateoftheart, fullyautomated consolidation testing system designed for soil. This means that a greater volume of water must be expelled from the soil and this will require a longer time. Insitu test calibrations for evaluating soil parameters. Now when then this phase is switched back to the k0 procedure it is no longer possible to enter a time interval, suggesting correctly that time is not relevant for a k0 procedure phase. This paper investigates the permeability characteristics of compacted loess by focusing on the anisotropy parallel and perpendicular to the compaction.
Test cpt soundings can be very effective in site characterization, especially sites with discrete stratigraphic horizons or discontinuous lenses. As of now, we are able to fulfill orders but we will keep you posted as the situation evolves. Test process and test process development software testing standards isoiec 29119 and 33063 isoiec 29119 software testing isoiec 33063 assessment of testing ossi taipale, heikki uusitalo. Vj tech ltd clisp studio stress path software module all. In a triaxial shear test, stress is applied to a sample of the material being tested in a way which results in stresses along one axis being different from the.
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