Measurement of Ground Heave Due to Horizontal Borehole Instability during Horizontal Directional Drilling Experiments in Sand

• DOI: 10.1061/9780784481646.039
• Publication Date: 2018-07-11T10:10:01Z
• Authors: Haitao Lan; Ian D. Moore; Dong Wang
• Keywords: Directional Drilling; Horizontal and vertical

Ground movement due to blow-out (unconfined shear failure) can develop when conducting pipe installation by horizontal directional drilling through sand, and this endanger pavements, sidewalks, other buried infrastructure. This paper presents compares the three methods used monitor ground movements in experiments conducted at Queen's University investigate borehole instability excessive mud pressures. Particle image velocimetry is a method widely displacements different geotechnical structural applications, new post-processing procedure for Geo-PIV software introduced reduce displacement errors associated with application dimensional problems. SfM-MVS (structure motion multi-view stereo) LiDAR (light detection ranging) was also record surface geometry before after each experiment, permit comparisons deformation data from Geo-PIV. The advantages disadvantages of these monitoring are then discussed. Finally, progressive development heave changes pressure will be illustrated. These findings significant value specialists analyzing during projects sand.