Post-processing of GNSS data using open source software for structural deformation monitoring

Abstract. TerraSAR-X satellite SAR (Synthetic Aperture Radar) scenes have been analysed using Persistent Scatter Interferometry (PSI) approach to monitor a tunnelling process in Düsseldorf, Germany. The aim of this work is to detect the deformation of ground surface and structures above the tunnelling line during the tunnel excavation. In this study, the PSI approach integrated in the open source software package Stanford Method for Persistent Scatterers (StaMPS) was employed since it has shown significant advantages in obtaining Persistent Scatterers (PS). In order to protect the historic buildings in this region from subsidence-induced damages, a Tunnel Boring Machine (TBM) was used to restrain serious displacements during the tunnelling excavation, as well as compensation injections. Both surface uplifting and subsidence were observed during this tunnelling process, by a levelling survey and a validated PSI observation. It is concluded that sub-centimetre accuracy observations are achievable for process-related monitoring in urban areas, using the open source software package.

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Surveying and mapping a cave using 3d laser scanner: the open challenge with free and open source software

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprsarchives-xl-5-181-2014 ◽

2014 ◽

Vol XL-5 ◽

pp. 181-186 ◽

Cited By ~ 8

Author(s):

T. Cosso ◽

I. Ferrando ◽

A. Orlando

Keyword(s):

Open Source ◽

Open Source Software ◽

Three Dimensional ◽

Laser Scanner ◽

Point Clouds ◽

Post Processing ◽

Dimensional Model ◽

Three Dimensional Model ◽

Surveying And Mapping

The present work is part of a series of activities involving different skills, in order to explore and document in detail one of the most visited caves in Liguria Region. In this context, in addition to speleologists, geologists, videographers, the geomatic expertise has also been involved to carry out a laser scanner survey, in order to produce a three-dimensional model of the two more easily accessible rooms of the cave. The survey was carried out using Z+F IMAGER® 5010 instrument and the post processing operations related to registration of point clouds have been made with Z+F LaserControl®. Subsequently, two different free and open source software were used: MeshLab, to merge the point clouds and to obtain the final mesh, and CloudCompare, to make filtering on the previous results and to extract sections.

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Pre and Post Processing for Boundary Element Method (BEM) 3D Reinforced Concrete Corrosion Simulation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.462-463.230 ◽

2011 ◽

Vol 462-463 ◽

pp. 230-235 ◽

Cited By ~ 4

Author(s):

Syarizal Fonna ◽

M. Ridha ◽

S. Huzni ◽

Ahmad Kamal Ariffin ◽

Israr

Keyword(s):

Reinforced Concrete ◽

Boundary Element Method ◽

Open Source ◽

Open Source Software ◽

Post Processing ◽

Concrete Corrosion ◽

Processing Procedure ◽

Simulation Results ◽

Corrosion Simulation ◽

Reinforced Concrete Corrosion

Corrosion simulation of rebar in concrete structures using BEM 3D have been developed. However, pre processing procedure such as geometry development and meshing is still performed manually. In addition, the visualization of BEM simulation results is still illustrated using the simple chart and graph. Nowadays, many softwares have been developed under open source platform that can be used freely. There is open source softwares for CAE purposes such as Salome and VisIt. The aim of this study is to implement the open source software as pre- and post-processing for the developed BEM 3D code in order to simulate corrosion of reinforced concrete. Salome 2.3.9 is used for developing geometry and meshing the model. The visualization of the simulation results are conducted using VisIt 1.8. The study shows that the open source software i.e. Salome and VisIt, perform well as pre and post processing of developed code for simulating the corrosion of reinforced concrete. It shows that the meshing procedure and the interpretation of results become simpler and easier.

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