Cone Bearing Estimation Utilizing a Hybrid HMM and IFM Smoother Filter Formulation  

作　　者：Erick Baziw Gerald Verbeek Erick Baziw;Gerald Verbeek(Baziw Consulting Engineers, Vancouver, BC, Canada;Baziw Consulting Engineers, Tyler, Texas, USA)

机构地区：[1]Baziw Consulting Engineers, Vancouver, BC, Canada [2]Baziw Consulting Engineers, Tyler, Texas, USA

出　　处：《International Journal of Geosciences》2021年第11期1040-1054,共15页地球科学国际期刊（英文）

摘　　要：Cone penetration testing (CPT) is a widely used geotechnical engineering </span><i><span style="font-family:Verdana;">in-situ</span></i><span style="font-family:Verdana;"> test for mapping soil profiles and assessing soil properties. In CPT, a cone on the end of a series of rods is pushed into the ground at a constant rate and resistance to the cone tip is measured (</span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">m</span>}</i><span style="font-family:Verdana;">). The </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">m</span>}</i><span style="font-family:Verdana;"> values are utilized to characterize the soil profile. Unfortunately, the measured cone tip resistance </span></span><span style="font-family:Verdana;">is</span><span style="font-family:""><span style="font-family:Verdana;"> blurred and/or averaged which can result in the distortion of the soil profile characterization and the inability to identify thin layers. This paper outlines a novel and highly effective algorithm for obtaining cone bearing estimates </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">t</span>}</i><span style="font-family:Verdana;"> from averaged or smoothed </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">m</span>}</i><span style="font-family:Verdana;"> measurements. This </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">t</span>}</i><span style="font-family:Verdana;"> optimal filter estimation technique is referred to as the </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">t</span>}<span style="font-family:Verdana;">HMM-IFM</span></i><span style="font-family:Verdana;"> algorithm and it implements a hybrid hidden Markov model and iterative forward modelling technique. The mathematical details of the </span><i><span style="font-family:Verdana;">q</Cone penetration testing (CPT) is a widely used geotechnical engineering </span><i><span style="font-family:Verdana;">in-situ</span></i><span style="font-family:Verdana;"> test for mapping soil profiles and assessing soil properties. In CPT, a cone on the end of a series of rods is pushed into the ground at a constant rate and resistance to the cone tip is measured (</span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">m</span>}</i><span style="font-family:Verdana;">). The </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">m</span>}</i><span style="font-family:Verdana;"> values are utilized to characterize the soil profile. Unfortunately, the measured cone tip resistance </span></span><span style="font-family:Verdana;">is</span><span style="font-family:""><span style="font-family:Verdana;"> blurred and/or averaged which can result in the distortion of the soil profile characterization and the inability to identify thin layers. This paper outlines a novel and highly effective algorithm for obtaining cone bearing estimates </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">t</span>}</i><span style="font-family:Verdana;"> from averaged or smoothed </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">m</span>}</i><span style="font-family:Verdana;"> measurements. This </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">t</span>}</i><span style="font-family:Verdana;"> optimal filter estimation technique is referred to as the </span><i><span style="font-family:Verdana;">q</span>_{<span style="font-family:Verdana;">t</span>}<span style="font-family:Verdana;">HMM-IFM</span></i><span style="font-family:Verdana;"> algorithm and it implements a hybrid hidden Markov model and iterative forward modelling technique. The mathematical details of the </span><i><span style="font-family:Verdana;">q</

关 键 词：Bayesian Recursive Estimation (BRE) Cone Penetration Testing (CPT) Geotechnical Site Characterization Hidden Markov Model (HMM) Iterative Forward Modelling (IFM) SMOOTHING 

分 类 号：O17[理学—数学]