LIS Geology - discontinuity and failure analyses
The package contains tools for structural geology, including tools to derive the bedding orientation from lineaments, to create pole plots, to derive discontinuity sets and joint planes, to calculate joint spacings, and to perform kinematic failure analyses. Applications are slope stability analyses and the derivation of block sizes.
Tool: Bedding Orientation
| Features |
|---|
| • estimation of the 3D orientation of bedding planes from a DTM and lineaments |
| • inputs: raster DTM, line shapefile |
| • outputs: line shapefile with the attributes dip direction, dip, strike, and quality measures |
| Application |
|---|
| • determination of bedding orientations |
| • engineering geology and geotechnical engineering |
Tool: Bedding Orientation [interactive]
| Features |
|---|
| • estimation of the 3D orientation of bedding planes from a DTM and digitized lineaments |
| • input: raster DTM |
| • outputs: digitized line shapefile with the attributes dip direction, dip, strike, and quality measures |
| Application |
|---|
| • determination of bedding orientations |
| • engineering geology and geotechnical engineering |
Tool: Create Pole Plot
| Features |
|---|
| • creation of pole plots from pre-computed normal vectors |
| • calculation of penetration points of normals for the lower hemisphere |
| • plotting on an equal-area stereonet |
| Application |
|---|
| • plotting of the spatial orientation of planes |
| • engineering geology and geotechnical engineering |
Tool: Discontinuity Sets
| Features |
|---|
| • determination of discontinuity sets from a point cloud with pre-computed normal vectors and a pole plot of the normals |
| • Kernel Density Estimation to detect poles of potential discontinuity sets |
| • constraining parameters for final pole detection: maximum number of sets and minimum normal difference between the poles |
| • constraining parameter for point labelling: maximum normal difference between the point’s normal and the normal of the set’s pole |
| • outputs: derived poles and their orientation, stereoplot showing the set ID assignment |
| • optional point cloud output attributes: joint set ID, set normal, dip direction, dip |
| Application |
|---|
| • determination of discontinuity sets and their orientation within a rockface |
| • dip direction and dip computation |
| • visualization of processing results |
| • engineering geology and geotechnical engineering |
Tool: Discontinuity Spacing
| Features |
|---|
| • determination of the discontinuity spacing of rock masses |
| • input: point cloud with derived discontinuity sets |
| • output: (non-persistent) discontinuity spacing |
| • spacings of each set are reported both as cumulative frequency distribution and histogram |
| • information on set orientation and spacing statistics is reported in a table |
| • optional output: measurement graph as 3D shapefile and midpoints of the edges of the measurement graph as point cloud (attributes: set ID, joint plane IDs used for measurement, measured distance) |
| Application |
|---|
| • determination of the discontinuity spacing of rock masses |
| • statistics of discontinuity spacing |
| • creation of maps with mean spacing (per set) |
| • creation of fracture density maps |
| • rock slope stability analysis |
| • derivation of block size distributions |
| • engineering geology and geotechnical engineering |
Tool: Kinematic Slope Analysis
| Features |
|---|
| • slope failure analysis based on Markland's test |
| • input: point cloud with normal vectors and joint plane IDs |
| • supported mechanims: plane failures, toppling failures, wedge failures |
| • output: point cloud attribute with failure classification |
| Application |
|---|
| • kinematic slope analyses |
| • slope failure analyses |
| • 3D mapping of slope failure mechanisms |
| • engineering geology and geotechnical engineering |