NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM最新文献

Experimental Study to Characterize a Magneto-Functional Technology vs. Corrosion in Reinforced Concrete Structures 表征磁功能技术与钢筋混凝土结构腐蚀的实验研究

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120021

D. Souriou, A. Ihamouten, S. Kadkhodazadeh, B. Fan, D. Guilbert

{"title":"Experimental Study to Characterize a Magneto-Functional Technology vs. Corrosion in Reinforced Concrete Structures","authors":"D. Souriou, A. Ihamouten, S. Kadkhodazadeh, B. Fan, D. Guilbert","doi":"10.3997/2214-4609.202120021","DOIUrl":"https://doi.org/10.3997/2214-4609.202120021","url":null,"abstract":"Summary In this paper, we propose to show the results of an experimental study to validate a concept of a new Structure Health Monitoring (SHM) sensor dedicated to the detection of aggressive agents in reinforced concrete structures. This sensor, aimed to be embedded in cover concrete, is composed with a permanent part, that acts as a reference magnetic source, coupled with a magneto-functional material (or reactive part), directly in touch with aggressive agents (chlorides in our case) that can cause its corrosion. As a function of its corrosion rate, the reactive part can filter differently a magnetic non destructive observable measured from the permanent part. We chose to present measurements of the magnetic non destructive observable of sensors with reactive parts in their initial and corroded states. The influence of reactive part’s thickness and corrosion rate (based on relative mass loss of reactive part) are shown. Variations of the magnetic observable can be correlated with mass loss of reactive part. These results allowed to draw a empirical calibration curves providing a possibility to monitor reactive part’s corrosion rate. These informations could be used to detect the presence of aggressive agents before they reach rebars.","PeriodicalId":418930,"journal":{"name":"NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129056756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-disciplinary geophysical investigation to identify road failure mechanism 多学科地球物理调查，以确定道路破坏机制

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120086

A. Verweerd, J. Gomery

引用次数: 0

Terrestrial CSEM for buried steel infrastructure 地埋钢结构的地面电磁扫描

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120033

M. Hickey, S. Treviño, M. Everett

{"title":"Terrestrial CSEM for buried steel infrastructure","authors":"M. Hickey, S. Treviño, M. Everett","doi":"10.3997/2214-4609.202120033","DOIUrl":"https://doi.org/10.3997/2214-4609.202120033","url":null,"abstract":"Summary Maintenance of buried steel infrastructure is an important problem in civil engineering practice. Corrosion, for example, can lead to damage and excessive repair or replacement expenses. Soil corrosivity is one of the main physical factors that determines the corrosion rate of pipelines and other steel infrastructure. Methods that can reliably estimate soil corrosivity by non-invasive and inexpensive means would be of great benefit to the civil engineering community. Soil corrosivity is well-known to depend on multiple interacting physical factors such as moisture content, aeration, pH, organic matter content, microbial activity, etc. However, in most cases a dry and/or sand-dominated soil is electrically resistive and generally less corrosive in comparison with a wet and/or clay-dominated soil characterized by lower bulk resistivity. In this paper, with the objective of evaluating terrestrial CSEM as a potential tool for mapping possible corrosion of buried steel infrastructure, we examine synthetic responses from a terrestrial CSEM layout and report the magnitudes and characteristics of secondary signals that are caused by the presence of a zone of anomalous soil resistivity surrounding a uniform steel pipe. Further consideration of development of a practical slingram-type terrestrial CSEM system for steel infrastructure investigation is recommended.","PeriodicalId":418930,"journal":{"name":"NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116735014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical imaging of the slip geometry of a deep-seated landslide (Canelles Dam, NE Spain) 深层滑坡滑动几何形状的电成像(Canelles大坝，西班牙东北部)

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120031

A. Sendrós, M. Himi, C. Abancó, R. Lovera, L. Rivero, A. Urruela, R. García‐Artigas, A. Casas

{"title":"Electrical imaging of the slip geometry of a deep-seated landslide (Canelles Dam, NE Spain)","authors":"A. Sendrós, M. Himi, C. Abancó, R. Lovera, L. Rivero, A. Urruela, R. García‐Artigas, A. Casas","doi":"10.3997/2214-4609.202120031","DOIUrl":"https://doi.org/10.3997/2214-4609.202120031","url":null,"abstract":"Summary The occurrence of large landslides in the slopes of reservoirs may produce a reduction of the water storage capacity and generate water waves which could cause catastrophic flooding if the dam crest is overtopped or breached. The massive and catastrophic rockslide of Vajont reservoir that occurred in 1963 demonstrated the importance of performing detailed geological, geomorphological, hydrogeological and geotechnical investigations in rock masses and soil slopes. Electrical resistivity tomography (ERT) is a non-invasive technology, highly responsive to geological changes that has demonstrated useful to provide the detailed subsurface information required to improve the diagnosis of the slope stability and finding the most suitable zones to fail. The relationships between the electrical resistivity of the high and low-bearing capacity sediments identified in Canelles site highlight the potential of geoelectical methods over other more costly subsurface exploration techniques. The proposed approach show potential to be applied coupled to numerical models to define the boundary conditions up to 100 meters depth with a 5–10 meters resolution and could also help to optimize the required borehole research and monitoring campaign in the initial research stages of landslide characterization.","PeriodicalId":418930,"journal":{"name":"NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124034483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of Deep Lerning on GPR data for parameter inversion of buried cylindrical pipes 利用探地雷达数据的深度学习进行埋地圆柱形管道参数反演

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120070

R. Jaufer, A. Ihamouten, Shreedhar Savant Todkar, F. Bosc, Y. Goyat, X. Dérobert

{"title":"Use of Deep Lerning on GPR data for parameter inversion of buried cylindrical pipes","authors":"R. Jaufer, A. Ihamouten, Shreedhar Savant Todkar, F. Bosc, Y. Goyat, X. Dérobert","doi":"10.3997/2214-4609.202120070","DOIUrl":"https://doi.org/10.3997/2214-4609.202120070","url":null,"abstract":"Summary Ground Penetrating Radar (GPR) has become one of the popular Non-Destructive Testing (NDT) methods in the field of Geophysics and civil engineering applications. In this context, for applications like concrete rebars assessments, utility networks surveys, the precise localization of embedded cylindrical pipes remains still challenging due to complex geometrical and dielectric characteristics of the stratified medium. In recent years, several hyperbola-centric machines learning based novel techniques have been introduced to accomplish localization of cylindrical objects from the GPR data. In this paper, performance of Multi-layer perceptron (MLP) based Artificial Neural Networks (ANN) model combined with six statistical travel time features extracted from hyperbola were studied. The model is used to predict the velocity of the stratified medium, depth of cylindrical pipe and radius of the pipe. The approach is based on hyperbola traces emerging from a set of B-scans, whereas the shape of hyperbola highly varies with depth and radius of the pipe as well as the velocity of the medium. Hence, Finite-Difference Time-Domain (FDTD) based 2D numerical tool namely GprMax is used to simulate GPR data. A parametric comparison is also included in the performance analysis of the techniques in terms of relative error estimations against designed parameters.","PeriodicalId":418930,"journal":{"name":"NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133486486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constraining gravity inversion using interpreted GPR data 利用解释GPR数据约束重力反演

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120253

F. Rahimzadeh, A. Rodgers, A. Faramarzi, N. Metje, M. Stringfellow

引用次数: 0

Measuring shallow shear wave velocity profiles for earthquake ground motion estimation 测量浅层横波速度剖面用于地震地震动估计

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120250

P. Somerville

引用次数: 0

Operational Use Cases Using Resqml Standard to Communicate Geotechnics and Subsurface Information to Bim 使用Resqml标准向Bim传达岩土技术和地下信息的操作用例

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120060

V. Gauthier, P. Labourg, J. Leonard, J. Rainaud

{"title":"Operational Use Cases Using Resqml Standard to Communicate Geotechnics and Subsurface Information to Bim","authors":"V. Gauthier, P. Labourg, J. Leonard, J. Rainaud","doi":"10.3997/2214-4609.202120060","DOIUrl":"https://doi.org/10.3997/2214-4609.202120060","url":null,"abstract":"Summary The aim of this presentation in four parts is to present how the RESQML format previously designed to exchange between Geosciences applications can be used in the Geotechnical domain by a BIM (Building Information Modeling) software to receive a global consistent image of the subsoil combining Geology, Geotechnics and DTM (Digital Terrain Modeling). We present the main RESQML principles, explain how the RESQML format (www.energistics.org) handle semantically the subsurface information, and demonstrate how EGIS GROUP, an Environmental and Infrastructure Company, was setting up a software environment with the help of a Geoscience expert to communicate subsoil information to a BIM oriented software (CIVIL 3D from Autodesk). Then, we show on several Use cases how the information is finally integrated in a BIM environment to be used by operational teams. These use cases were realized by RESQML CAD, A plug-in for Autodesk Civil 3D, developed in C#.NET under Visual Studio in collaboration between EGIS and GEOSIRIS. This tool is providing Geotechnical information as horizons and faults of the 3D models, drawing boreholes in 3D, drawing fence-diagrams and 3D logs data to this BIM software. Each drawn element is also associated to a list of attributes in a BIM database","PeriodicalId":418930,"journal":{"name":"NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129679329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geological Reconstruction by 2D-ERT of the Maddaloni-Durazzano Ridge (Italy) for a Railway Line Design madaloni - durazzano山脊(意大利)铁路线路设计2D-ERT地质重建

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120005

C. Fabozzi, S. Vitale, C. De Paola, S. Ciarcia, R. Di Maio

{"title":"Geological Reconstruction by 2D-ERT of the Maddaloni-Durazzano Ridge (Italy) for a Railway Line Design","authors":"C. Fabozzi, S. Vitale, C. De Paola, S. Ciarcia, R. Di Maio","doi":"10.3997/2214-4609.202120005","DOIUrl":"https://doi.org/10.3997/2214-4609.202120005","url":null,"abstract":"Summary We present a geophysical study for the executive project of a railway tunnel across the Maddaloni-Durazzano carbonate ridge (southern Italy). To reconstruct the geological setting of the area, a N-S oriented electrical resistivity tomography (ERT) profile, about 4 km long, was performed, which allowed an exploration depth of about 200 m from the surface level. The results of the 2D inversion model of the ERT profile clearly highlight anomalous resistive blocks that can be associated with fractured/karst sectors of the Cretaceous carbonate succession affected by significant water circulation, while there are no evident resistivity anomaly features linked to the presence of large cavities. Significantly, the geophysical model identifies at the northern end of the ERT profile, where the entrance to the tunnel was planned, the presence of the regional thrust fault bounding the northern side of the ridge, which was hypothesized by the geological cartography but not supported by field observations. The validation of the geological-structural model provided by the ERT interpretation was derived from geognostic boreholes and direct observations carried out during the excavation of a tunnel crosscutting the ERT section.","PeriodicalId":418930,"journal":{"name":"NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130975109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Combination of Passive and Active Methods Towards Site Characterization of Accelerometer Stations in Greece 被动与主动相结合的希腊加速度计站点表征方法

NSG2021 2nd Conference on Geophysics for Infrastructure Planning, Monitoring and BIM Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120124

G. Papadopoulos, ILIAS FIKOS, A. García-Jerez, N. Theodoulidis, G. Vargemezis

引用次数: 1