Mapping and characterization of rock discontinuities in a tunnel using 3D terrestrial laser scanning

Cacciari, Pedro Pazzoto; Futai, Marcos Massao

doi:10.1007/s10064-015-0748-3

Cited by 56 publications

(34 citation statements)

References 27 publications

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“…8. Effect of orientation bias on discontinuity sampling and the Terzaghi correction factor (from: Cacciari and Futai, 2016). Table 2 The statistical result of trace length and trace midpoint density using a concentric circular sampling window.…”

Section: Characterization Of the Rock Mass Structure For Hlw Disposalmentioning

confidence: 99%

Estimation of Fracture Geometry Parameters and Characterization of Rock Mass Structure for the Beishan Area, China

Xiang

Meng

Cheng

et al. 2020

Acta Geologica Sinica (Eng)

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The accurate estimation of fracture geometry parameters and the characterization of rock mass structure are two important topics in the geological disposal system of high-level radioactive waste (HLW). The Beishan area, as the current preselected area for China's HLW disposal, has three subareas considered to be the key survey area at the stage of site selection. In this paper, a comprehensive survey method conducted on the outcrop is developed to estimate fracture geometry parameters. Results show that fracture occurrence obeys a Fisher distribution, fracture trace length obeys a normal distribution, and the distribution of spacing obeys a negative exponential distribution. An evaluation index, Rock Mass Structure Rating (RMSR), is proposed to characterize rock mass structure for the three subareas. The results show that the Xinchang area is more suitable to act as China's HLW disposal repository site. At the same time, the index can also be applied to characterize surface rock mass structure and rock mass integrity at the site selection phase of HLW disposal.

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Section: Characterization Of the Rock Mass Structure For Hlw Disposalmentioning

confidence: 99%

Estimation of Fracture Geometry Parameters and Characterization of Rock Mass Structure for the Beishan Area, China

Xiang

Meng

Cheng

et al. 2020

Acta Geologica Sinica (Eng)

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“…Mapeo y caracterización de los sistemas de discontinuidades Cacciari y Futai (2015, 2016a han caracterizado geotécnicamente los sistemas de discontinuidades usando la técnica remota de escáner láser tridimensional TLS para generar las nubes de puntos mostradas en la Figura 3a.…”

Section: Ingeniería Geológica Geología Regional Y Localunclassified

“…Figura 5: Probetas de roca de ensayos UCS: a) con plano de foliación inclinado a 35 o , b) con plano de foliación horizontal y c) con plano de foliación vertical (Ito, 2016) Figura 6: Modos de falla: a) falla violenta sin recuperación, b) falla en varios planos con recuperación, c) falla a lo largo de un plano con recuperación y d) falla a lo largo de dos planos con recuperación (Ito, 2016) Tabla 1: Datos geo-estructurales utilizados para la generación de DFN bi-dimensional (Cacciari y Futai, 2015, 2016a (Ito, 2016).…”

Section: Ensayos De Laboratoriounclassified

“…Actualmente, las mallas de fracturas discretas DFNs (Discrete Fracture Networks) es la técnica mayormente usada, la cual ofrece la oportunidad de maximizar el uso de datos geo-estructurales recolectados por mapeo geotécnico manual y/o técnicas de muestreo remoto, como fotogrametría digital y escáner láser, i.e., LiDAR o TLS (Elmo et al, 2014). Cacciari y Futai (2015, 2016a, 2016b han presentado una metodología para simulaciones numéricas tridimensionales de túneles excavados en macizos rocosos discontinuos, basándose en la técnica de escaneo láser terrestre TLS (Terrestrial Laser Scanning) y generación de DFNs. Estos autores han discutido varios aspectos relacionados con el mapeo de discontinuidades mediante TLS, análisis de discontinuidades por métodos de muestreo en ventanas y modelamiento numérico de DFNs.…”

Section: Introductionunclassified

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Modelamiento numérico de la formación e inestabilidad de bloques alrededor del túnel Monte Seco excavado en un macizo rocoso discontinuo

Villalobos¹,

Cacciari²,

Futai³

2017

Obras y Proyectos

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“…In this way, the full-ring deformation data, rather than deformation data at disperse locations, can be obtained by analyzing the collection of data points, which is termed as 'point cloud data'. The applications of TLS have been widespread in many fields, especially in geometry documentation and structure monitoring of, e.g., landforms [9][10][11], building structures [12][13][14], road markings [15][16][17], river banks [18][19][20], pipelines [21,22], landslides [23][24][25], and tunnels [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Identification and Visualization of the Full-Ring Deformation Characteristics of a Large Stormwater Sewage and Storage Tunnel Using Terrestrial Laser Scanning Technology

et al. 2019

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Constructing deeply-buried stormwater sewage and storage tunnels is an effective method to mitigate the waterlogging and sewer overflow problems in modern cities. Prior to construction of such tunnels, a structural loading test is essential for acquiring the mechanical responses under complex loading conditions, such as cyclic inner hydraulic head, during which capturing the full-ring deformation of the tunnel lining is significant for a comprehensive understanding of the tunnel’s mechanical behaviors. This paper introduces the application of terrestrial laser scanning (TLS) technology in the full-scale structural loading tests of a large stormwater sewage and storage tunnel, which gives the full-ring deformation throughout the tests. A data processing methodology was developed to extract the key data points of the lining segments from the original data cloud by removing noise points and mitigating data jump, based on which the deformation of testing the lining segments at arbitrary locations can be calculated. Furthermore, a post-processing software was developed to visualize the full-ring deformation. The full-ring deformation at different loading conditions and its evolution under cyclic loading were captured. It is shown that the lining’s convergence deformation is more sensitive to the inner hydraulic head than to the external soil-water pressure, and the deformation cannot fully recover in a water-inflow-and-drainage cycle due to the presence of joints.

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Mapping and characterization of rock discontinuities in a tunnel using 3D terrestrial laser scanning

Cited by 56 publications

References 27 publications

Estimation of Fracture Geometry Parameters and Characterization of Rock Mass Structure for the Beishan Area, China

Estimation of Fracture Geometry Parameters and Characterization of Rock Mass Structure for the Beishan Area, China

Modelamiento numérico de la formación e inestabilidad de bloques alrededor del túnel Monte Seco excavado en un macizo rocoso discontinuo

Identification and Visualization of the Full-Ring Deformation Characteristics of a Large Stormwater Sewage and Storage Tunnel Using Terrestrial Laser Scanning Technology

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