Landslide monitoring using terrestrial laser scanner and robotic total station in Rancabali, West Java (Indonesia)

2017 ◽  
Author(s):  
Irwan Gumilar ◽  
Alif Fattah ◽  
Hasanuddin Z. Abidin ◽  
Vera Sadarviana ◽  
Nabila S. E. Putri ◽  
...  
Keyword(s):  
Laser Scanner ◽  
Landslide Monitoring ◽  
Terrestrial Laser Scanner ◽  
West Java ◽  
Total Station ◽  
Robotic Total Station

scholarly journals Displacement Study of a Large-Scale Freeform Timber Plate Structure Using a Total Station and a Terrestrial Laser Scanner

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 413 ◽  
Author(s):  
Anh Chi Nguyen ◽  
Yves Weinand
Keyword(s):  
Large Scale ◽  
Numerical Models ◽  
Laser Scanner ◽  
Experimental Tests ◽  
Point Clouds ◽  
Element Model ◽  
Experimental Investigations ◽  
Bottom Surface ◽  
Terrestrial Laser Scanner ◽  
Total Station

Recent advances in timber construction have led to the realization of complex timber plate structures assembled with wood-wood connections. Although advanced numerical modelling tools have been developed to perform their structural analysis, limited experimental tests have been carried out on large-scale structures. However, experimental investigations remain necessary to better understand their mechanical behaviour and assess the numerical models developed. In this paper, static loading tests performed on timber plate shells of about 25 m span are reported. Displacements were measured at 16 target positions on the structure using a total station and on its entire bottom surface using a terrestrial laser scanner. Both methods were compared to each other and to a finite element model in which the semi-rigidity of the connections was represented by springs. Total station measurements provided more consistent results than point clouds, which nonetheless allowed the visualization of displacement fields. Results predicted by the model were found to be in good agreement with the measurements compared to a rigid model. The semi-rigid behaviour of the connections was therefore proven to be crucial to precisely predict the behaviour of the structure. Furthermore, large variations were observed between as-built and designed geometries due to the accumulation of fabrication and construction tolerances.

scholarly journals Applicability and Analysis of the Results of Non-Contact Methods in Determining the Vertical Displacements of Timber Beams

2021 ◽  
Vol 11 (19) ◽  
pp. 8936
Author(s):  
Boštjan Kovačič ◽  
Luka Štraus ◽  
Mateja Držečnik ◽  
Zoran Pučko
Keyword(s):  
Construction Projects ◽  
Laser Scanning ◽  
Laser Scanner ◽  
Meteorological Conditions ◽  
Total Station ◽  
Engineering Geodesy ◽  
Vertical Displacements ◽  
Robotic Total Station ◽  
Timber Beams

Determining the displacements and consequent deformations of structures is a demanding branch of engineering. Displacements are most often determined by geodetic methods, among which high-precision non-contact methods have recently taken the lead. Engineering geodesy is an indispensable part of construction projects. In the desire for efficient and fast measurements, the technology of terrestrial laser scanning (TLS) and the use of robotic total station (RTS) and other geodetic methods are becoming more and more useful for engineers. In the presented study, we focused on the measurement and comparison of vertical displacements with various mentioned equipment and the determination of the influence of meteorological conditions on the displacements of timber beams that we used to perform the experiment. Measurements were performed both in the laboratory and outdoors. A novelty in the work was the use of a TLS scanner to determine the evaluation of small value displacements and the analysis of the usability of geodetic measuring equipment. In the Materials and Methods section, we describe the equipment used and the characteristics of the beams. The Results section describes the experimental outcomes, which include the performance of experimental analysis of vertical displacements of timber beams under different meteorological conditions. Altogether, the results consist of geodetic measurements and the processing of measured data. The results of measurements of vertical displacements with a terrestrial laser scanner were compared with the results obtained with a robotic total station were evaluated and compared with the displacements calculated from static analysis and the results of other methods used.

On the use of terrestrial laser scanner for deformation analysis of the Talaga Bodas Crater West Java (Indonesia)

2016 ◽  
Author(s):  
Irwan Gumilar ◽  
Muhammad N. A. Basith ◽  
Hasanuddin Z. Abidin ◽  
Nia Haerani
Keyword(s):  
Laser Scanner ◽  
Deformation Analysis ◽  
Terrestrial Laser Scanner ◽  
West Java

scholarly journals STUDI PEMANFAATAN TEKNOLOGI TERRESTRIAL LASER SCANNER UNTUK MENGHITUNG VOLUME PENGUPASAN OVERBURDEN DI PIT 2 ELEKTRIFIKASI BANKO BARAT PT. BUKIT ASAM, TBK. TANJUNG ENIM, SUMATERA SELATAN

2019 ◽  
Vol 1 (1) ◽  
pp. 47-60
Author(s):  
Ezil Defri Maharfi ◽  
Taufik Arief ◽  
Diana Purbasari
Keyword(s):  
Point Cloud ◽  
Laser Scanner ◽  
Point Clouds ◽  
Terrestrial Laser Scanner ◽  
Total Station ◽  
Cloud Data ◽  
Data Point ◽  
Cut And Fill

PT. Bukit Asam, Tbk. merupakan perusahaan pertambangan batubara yang terletak di Tanjung Enim, Kabupaten Muara Enim, Provinsi Sumatera Selatan. Selama ini pengukuran volume pengupasan overburden dilakukan menggunakan alat Total Station. Pengukuran area overburden yang luas dan bentuk permukaan yang beragam menggunakan Total Station dinilai kurang efektif karena lamanya waktu yang dibutuhkan dan rendahnya tingkat ketelitian. Oleh kerena itu, diperlukan alat yang dapat mengukur volume dengan cepat serta menghasilkan data ukuran volume yang detail dan dengan kerapatan tinggi. Salah satunya yaitu penggunaan Terrestrial Laser Scanner. Metode yang digunakan dalam melakukan pengukuran yaitu metode occupation and backsight. Pengukuran menggunakan metode occupation and backsight diperlukan dua titik yang telah diketahui koordinatnya yang digunakan sebagai titik berdiri alat dan untuk titik acuan (backsight). Metode registrasi yang digunakan yaitu metode occupation and backsight dan metode cloud to cloud. Data point clouds yang telah diregistrasi perlu dilakukan filtering untuk menghilangkan noise dan objek asing yang bukan lapisan overburden. Perhitungan volume dilakukan dengan metode cut and fill terhadap model tiga dimensi dari point cloud yang terbentuk. Data hasil perhitungan didapatkan volume pengupasan overburden selama Desember 2017 sampai dengan Mei 2018 adalah sebesar 847.937 m3, dengan rincian 255.700 m3 di bulan Desember 2017, 299.120 m3 di bulan Januari 2018, 227.543 m3 di Bulan Februari 2018 dan 65.572 m3 di bulan Maret 2018.

Turtle Mountain Deformation Monitoring 2008-2011

GEOMATICA ◽  
2013 ◽  
Vol 67 (1) ◽  
pp. 21-30
Author(s):  
Daniel Lo ◽  
Axel Ebeling ◽  
William F. (Bill) Teskey ◽  
Robert Radovanovic
Keyword(s):  
Least Squares ◽  
High Precision ◽  
Precise Point Positioning ◽  
Laser Scanner ◽  
Deformation Monitoring ◽  
Terrestrial Laser Scanner ◽  
Network Adjustment ◽  
Total Station ◽  
Gnss Receivers ◽  
Point Positioning

Deformation monitoring was carried out in two epochs on Turtle Mountain, Alberta using a high-precision total station, a terrestrial laser scanner, and geodetic quality GNSS receivers. From the total station observations, coordinates were computed for seven signalized target points in a least-squares network adjustment. Then, a deformation analysis using a multi-parameter transformation was performed to derive movements between epochs. Precise point positioning was performed using GNSS receivers at another set of target points and control points, with another least squares network adjustment performed on this network. Terrestrial laser scanning was performed in the saddle region, with registration via an iterative closest point algorithm performed on the two point clouds to determine movement between the two epochs. Movement into the saddle from North Peak and South Peak was detected by analysis of 2008 and 2011 high-precision total station observations. This movement was also detected by analysis of 2008 and 2011 terrestrial laser scanner observations. Movement of 10 of 18 target points on Turtle Mountain was detected by analysis of 2010 and 2011 precise point positioning observations. Backward or sideways tilting with little or no downhill translation occurred at 6 points, while downhill translation and/or forward tilting occurred at 4 points.

scholarly journals Landslide formation modelling and surveying of the slope in unsaturated and saturated ground conditions

2019 ◽  
Vol 133 ◽  
pp. 01010
Author(s):  
Janusz P. Kogut
Keyword(s):  
Structural Model ◽  
Laser Scanner ◽  
Landslide Monitoring ◽  
Terrestrial Laser Scanner ◽  
Stability Assessment ◽  
The Finite Element Method ◽  
Retaining Structure ◽  
Ground Conditions ◽  
Different Origin

The terrestrial laser scanner enables site remote sensing of the slopes in a simple and automated manner. Regular measurements with multiple scanner positioning might be applied in long term landslide monitoring. A detailed geological structural model allows for hazard assessment, and then for a slope stability assessment. Numerical model, along with the subsoil parameters, introduced into the Finite Element Method (FEM) software enables an estimation of landslide susceptibility and the possible displacements of the terrain in longer period of time, as well as, due to different loading cases. In this paper the formation of landslides and stability of the slope after the retaining structure establishment is analysed. Two analysed landslides have different origin and may be a threat even after stabilization works already maintained.

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