Field assessment of liquefaction prediction models based. The results of shear wave velocity are shown in fig. Comparing cpt and vs liquefaction triggering methods p. For cases that qc1ncs are less than 33, it was set to 33. Feb 19, 2011 liquefaction software free download liquefaction top 4 download offers free software downloads for windows, mac, ios and android computers and mobile devices. Our new soil liquefaction software addresses advanced issues such as cyclic softening in claylike soils and thin layerlayer transition zone detection. Liquefaction prediction and assessment charts, originally developed by seed and idriss, have been widely used for such design in practice, as well as for disaster prevention and mitigation. Whether you are a current liqit registered user or a new user searching for a. It covers liquefaction assessment using various empirical methods, and estimation of post liquefaction lateral spread and reconsolidation settlement of the site.
Liquefaction assessment geoconsult geotechnical engineers. Cliq is an application provides users an easy to use graphical environment specifically tailored for cone penetration test data cpt and cptu. If you require a liquefaction assessment report or you would like further information, please contact us. The analysis framework is described in idriss and boulanger 2008 except for the revised magnitude scaling factor msf developed herein that accounts for the effects of soil type and denseness. Download liquefaction analysis software for free windows. Which is the best software to assess liquefaction potential. It also includes the latest assessment procedure developed by. Scpt101 c p t b a s i c i n t e r p r e t a t i o n p l o t s n o r m a l i z e d cliq v. A cptbased effectivestress analysis procedure for liquefaction assessment has been presented. Initially, this involved implementing the three chosen cpt based liquefaction assessment methods and calculating the corresponding lpi. Evaluation of soil liquefaction using the cpt part 1 dr. This proposal is based upon information from various sources including. Dec 29, 2017 soilstructure software has liquefactionspt software.
Spreadsheets are hard to preserve and it is time consuming to do all the columns and rows of calculations using. Cpt prediction of soil behaviour type, liquefaction potential. This webinar will continue from parts 1 and 2 of using the cpt to evaluate soils for liquefaction and focus on realworld examples using the software program cliq. Pdf evaluation of the cone penetrometer test for spt. Liquefaction of loose saturated cohesionless soils under the effect of strong ground motion, is one of the most complex topic that the geotechnical earthquake engineer can face.
In the first attempt at using nn and cpt data for liquefaction assessment, researchers achieved the same accuracy as the conventional method. Liquefaction analysis soilstructure software youtube. Soil liquefaction assessment software from cpt cptu data. Pdf comparison of sptcpt liquefaction evaluations and. Cpt investigation engineering design consultants ltd. Attention turned to the possibility of using in situ penetration tests to assess the density and hence the resistance of soils in situ to liquefaction.
Whether you are a current liqit registered user or a new user searching for a cpt liquefaction assessment software, we strongly believe that you should try cliq. Download novocpt today and explore all the features. Section 4 provides an evaluation of the sptbased liquefaction triggering database relative to the liquefaction triggering correlation by idriss and boulanger 2004, 2008. Patient ruleinduction method for liquefaction potential. Cpt liquefaction software cliq is more advanced than the cpt section of the current. Further technical specifications of novoliq are presented below. The software addresses advanced issues such as cyclic softening in claylike soils and thin layerlayer transition zone detection. Cone penetration testing cpt has become the most common method for liquefaction assessment in christchurch, and issues have been identified with the soil behaviour type, liquefaction potential and vertical settlement estimates, particularly in the northwestern suburbs of christchurch where soils consist mostly of silts, clayey silts and. The fucino lacustrine basin in central italy is a large flat area mostly devoted to agriculture, with urbanization along the perimeter of the ancient. We use the computer program cliq, which was developed by prof. Ohio epa requires that the soil units at any waste containment facility be able to withstand the effects of a. For this type of analysis, there is no need to normalize and calibrate parameters since nn can consider all effective parameters together and find the relations between them. Matlab was the main platform used to code the computational components of this research. From the table, it is clear that soft computing techniques have been widely used for liquefaction modeling.
Liquefaction, cpt, sandy soil, artificial neural networks introduction soil liquefaction is a complex phenomenon mostly for saturated sandy soils. Evaluation and mitigation of liquefaction hazard for. Evaluation of liquefaction and re liquefaction observed in christchurch using cpt data 2 damage. The analysis framework is described in idriss and boulanger 2008 except for the revised magnitude. Liquefaction probability hazard map is one of the most important tasks in earthquake geotechnical engineering. Validation of three liquefaction assessment software packages with cpt data from the. Decision tree approach for soil liquefaction assessment.
Cone penetration test cptu processing software novo. A variety of techniques exist to remediate potentially liquefiable soils and mitigate. C p t b a s i c i n t e r p r e t a t i o n p l o t s n o r. Seisimager and liquefaction assessment software known as cliq were used to process both the masw and cpt data respectively. Test cpt soundings can be very effective in site characterization, especially sites with discrete. Liqit is a soil liquefaction analysis software for the assessment of liquefaction potential based on commonly used field data spt, cpt and vs. Soil liquefaction analysis software novoliq novo tech software. As with all of our software, all input and output data can be exported to an microsoft excel file type for further manipulation. Procedures and methods for a liquefaction assessment using.
Liquefaction assessment for an urban roading project in. Assessment of the liquefaction susceptibility of finegrained soils, journal of geotechnical and geoenvironmental engineering, asce 2 9, 11651177. Origin of cpt based methods all methods have similar origins. Peter robertson and is considered to be one of the most uptodate software available for assessing liquefaction.
In the process of analysing the data, the cpt strength profiles that were obtained before and after major aftershock events at sites of re liquefaction were compared. Simplified cpt performancebased assessment of liquefaction and effects. It is a windowsbased program with graphical presentations for geotechnical reports. In this test, data is typically collected at every 20 to 30 mm depth interval, and therefore, the results of cpt test is a large digital dataset. Comparison of sptcpt liquefaction evaluations and cpt interpretations. Liqit utilizes the most recent and wellknown used deterministic and probabilistc methods that exist today. The distributions of the data are examined with respect to various parameters e.
Cptbased probabilistic and deterministic assessment of in. Liquefaction prediction and assessment is a vital part of the earthquakeresistant design of structures on liquefiable soils. Analysis of liquefaction potential, dynamic settlement of soil layers above and below the groundwater gwt table and lateral spreading calculations if you have a sloping ground. Novo tech software innovative solutions for geotechnical.
Presented also are the most widely accepted methods for evaluating the liquefaction potential of cohesionless oils in level ground, for estimating earthquakeinduced settlements and. Cpt liquefaction software cliq is more advanced than the cpt section of the. Liquefaction spt liqspt program is a windows based program that performs three tasks. Evaluation of the cone penetrometer test for sptliquefaction assessment. A practical liquefaction assessment tool is developed using ann model. Cliq is more advanced than the cpt section of the current liqit software and provides users an easy to use graphical environment specifically. Jul 15, 20 this webinar will continue from parts 1 and 2 of using the cpt to evaluate soils for liquefaction and focus on realworld examples using the software program cliq. Abstracta probabilistic cone penetration test cpt based liquefaction triggering procedure for cohesionless soils is derived using a maximum likelihood method with an updated case history.
Liquefypro assists engineers in evaluating liquefaction potential and earthquakeinduced settlement. Soils report, cpt data files and architectural plans. Abstractthis paper presents a new simplified liquefaction prediction and assessment method that is capable of considering the influence of the waveforms and durations of earthquakes. Cpt liquefaction software cliq is more advanced than the cpt section of the current liqit software and provides users an easy to use graphical environment specifically tailored for cone penetration test data cpt and cptu. Cpt liquefaction software cliq is more advanced than the cpt section of the current liqit software and provides users an easy to use graphical environment specifically tailored for cone penetration. Liquefaction analysis software geoliqu geoadvanced. However, statistical methods such as lr and dt have been only used for liquefaction. From cliq software you can evaluate liquefaction potential of sites by using spt, cpt and shear wave velocity. Procedures and methods for a liquefaction assessment using geostudio 2007 1 introduction the purpose of this document is to highlight the key issues in a liquefaction assessment, and to outline the procedures and methods that can be used in geostudio 2007 to perform such an assessment. Cpt primary measurements include tip resistanceqc, sleeve frictionfs, and pore pressureu. Novoliq is a powerful, userfriendly geotechnical software for soil liquefaction analysis. Which is the best software to assess liquefaction potential of soil using the spt cpt data from field.
Which is the best software to assess liquefaction potential of soil. Liquefaction software free download liquefaction top 4. Novocpt cone penetration test cptu processing software novocpt novocpt is a powerful, userfriendly geotechnical software for processing and interpretation of cone penetration test data. Probability of liquefaction hazard map for yangon city. Please plan on bringing a laptop computer so you can follow along with the realworld examples using the popular geologismiki software programs, cpetit cpt interpreation and cliq liquefaction analysis. If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Significant developments have taken place over the past 20 years to evaluate the liquefaction potential of soils. Key elements in the proposed procedure can be summarized as follows. Yangon city is not only financial but also most populated city in myanmar. Dec 24, 2016 determination of seismic liquefaction susceptibility of soils is an imperative task in earthquake science. Cone penetration test cptu processing software novocpt. Cone penetration test cptu processing software novo tech.
Assessment of cptbased methods for liquefaction evaluation. The performance of this network is measured and the results are compared with a real case history. Evaluation of liquefaction and reliquefaction observed in. Bradley in practice, several competing liquefaction evaluation procedures leps are used to compute factors of safety against soil liquefaction, often for use within a liquefaction. Chapter 5 liquefaction potential evaluation and analysis this chapter provides information to use when evaluating and analyzing the potential for failure due to liquefaction during a seismic event at an ohio waste containment facility. Both cpt and shear wave velocity based methods were used in the liquefaction assessment with a particular emphasis on the liquefaction potential of the pleistocene aged soils. Cpt liquefaction worked examples using cliq version 2. A cptbased effective stress analysis procedure for. It covers liquefaction assessment using various empirical methods, and estimation of postliquefaction lateral spread and reconsolidation settlement of the site. Quantitative assessment of liquefaction potential in selected. Liquefaction resistance using cpt and field case histories.
Cliq is more advanced than the cpt section of the current liqit software and provides users an. The nceer liquefaction workshop document presented the standard penetration test spt, and the newer cone penetration test cpt methods to undertake liquefaction analyses, and discussed available. Evaluation of soil liquefaction using the cpt part 1. Cliq is more advanced than the cpt section of the current liqit software and provides users an easy to use graphical environment specifically tailored for cpt and cptu data. From interpretation of dissipation tests, seismic data, to liquefaction. Cpt liquefaction software cliq is more advanced than the cpt section of the current liqit software and provides users an easy to use graphical environment specifically tailored for cone penetration test.
Professor kevin franke and his team are developing a simplified model to assess. The code was developed to allow bulk processing of cpt data sets. Simply select your manager software from the list below and click. Novocpt is designed for processing cpt files and calculating soil parameters such as friction angle, relative density, unit weight, fines content, shear wave velocity, gmax, clay sensitivity, ocr, undrained. It performs liquefaction analysis, dynamic settlement and lateral displacement calculations. Cpt liquefaction worked examples using cliq version 2 gregg. This is accomplished using a comprehensive worldwide cptbased liquefaction.
Simplified liquefaction prediction and assessment method. Earthquake geotechnical engineering for protection and. Novocpt is a powerful, userfriendly geotechnical software for processing and interpretation of cone penetration test data. In the present study, the patient ruledinduction method prim, for the first time in the engineering literature, has been successfully employed to investigate the potential of liquefaction occurrence due to earthquake strikes in soils. Cptbased liquefaction triggering procedure journal of. This paper describes the land damage assessment process for christchurch, including the collection and processing of extensive data and observations related to liquefaction, the characterization of. C p t b a s i c i n t e r p r e t a t i o n p l o t s n. T1 liquefaction resistance using cpt and field case histories. Novocpt cone penetration test interpretation software. Liquefaction potential of sands using the cpt journal of. Soil liquefaction assessment software from cptcptu data.
To develop the prim model, a comprehensive database. From cliq software you can evaluate liquefaction potential of sites by using spt, cpt and. It covers liquefaction assessment using various empirical methods, and estimation of postliquefaction lateral. The method uses cpt tip resistance qc and sleeve friction fs, corrected for effective overburden stress. Novocpt is the most popular cpt processing software in the market. Liquiter by geostru is a software designed for soil liquefaction analysis, supporting a wide variety of field tests spt, vs, cpt, cpte, cptu. Cptbased analysis of liquefaction and reliquefaction.
Origin of cptbased methods all methods have similar origins. Education software downloads liquefaction spt analysis by soil structure, inc. Evaluation and mitigation of liquefaction hazard for engineering practice wednesday april 9th, 2014 maverik center, west valley, utah. N2 relationships between cone penetration tip resistance and the. Evaluation of liquefaction potential using neuralnetworks. Assessment of cptbased methods for liquefaction evaluation in a liquefaction potential index framework b. Interpretive software for cpt, cptu, scptu tests cone penetration test data interpretation, seismic cone data analysis. For the assessment of the liquefaction potential index the analyses were out carried using the cliq liquefaction assessment software ver. This webinar provides worked examples of cpt based liquefaction analyses using the software cliq v2 cliq v2 has several new features that will be demonstrated during this webinar. It will be a valuable addition to your software library. Liqsvs is a replacement of our liqit liquefaction assessment software. Whether you are a current liqit registered user or a new user searching for a cpt liquefaction assessment software, we strongly believe that you should try.
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