Engineering Geophysics connects onshore geotechnical engineering challenges to the geophysical methods that may be applied to solve them. Unknown geological conditions are a risk in construction projects, and geophysical information can help to identify those risks. The book answers questions on how, why, and when the individual and combined methods provide the results requested. Flowcharts guide the reader to geophysical methods that can be applied for various engineering challenges, and the solutions are illustrated with practical case histories.
The book is intended mainly for geotechnical engineers and geologists but also for geophysicists or managers in need of an overview or brushup on geophysical methods and their practical applications. In addition, it can be used by educational institutions in courses both for geotechnical engineers and geologists.
Author(s): Lone Klinkby, Anna Bondo Medhus
Publisher: CRC Press
Year: 2022
Language: English
Pages: 323
City: Boca Raton
Cover
Half Title
Title
Copyright
Contents
Editors
List of contributors
Preface
Acknowledgments
1 Introduction
2 Scope of work
3 Relationship between geotechnical and geophysical methods
4 Gravimetric method
5 Magnetometry method
6 Direct current resistivity methods
7 Electromagnetic methods
8 Ground penetrating radar
9 Reflection seismic methods
10 Seismic refraction methods
11 Surface wave methods
12 Case: mapping potential unexploded ordnance (UXO)
13 Case: geophysical investigation to delineate landfill
14 Case: 3D GPR in the inner yard at Frederiksborg Castle
15 Case: mapping of utilities when developing at an old coal storage facility
16 Case: near-surface electromagnetic survey to support the design of urban development plans
17 Case: archaeological investigation to identify a Romano-British farmstead using magnetic gradiometry
18 Case: integrated geophysical survey to locate buried structures
19 Case: total field magnetometry to locate buried foundations
20 Case: utility mapping with GPR at Copenhagen Harbour
21 Case: thickness of peat and depth to bedrock for road construction using ground penetrating radar
22 Case: multidisciplinary geophysical investigation for a new railway track in Norway
23 Case: road maintenance and ground frost
24 Case: depth to bedrock detection by integration of airborne EM data with sparse geotechnical drilling data for early phase road alignment
25 Case: delineation of aggregates gravels, sands, and silts using electrical resistivity tomography
26 Case: delineation of material type for use in ready-mix concrete
27 Case: mapping railroad ballast and geology using ground penetrating radar
28 Case: assessing loose soils for tower cable anchors using electrical resistivity
29 Case: delineation of soft soils and bedrock depth using integrated methods
30 Case: high-definition bedrock depth and conditions for urban construction project site evaluation in Switzerland using seismic refraction with combined GRM and tomographic approach
31 Case: paleo-channel investigation for seepage pathway potentials
32 Case: near-surface electromagnetic survey to support the design of climate adaptation in urban development plans
33 Case: geophysical investigation of slope stability using electrical resistivity tomography, seismic refraction, and surface waves
34 Case: integrated geophysical investigation to map a landslip
35 Case: mapping of quick clay risk by electrical resistivity tomography (ERT)
36 Case: quick clay volume delineation based on AEM resistivity, geotechnical soundings, and lab samples
37 Case: depth to bedrock and weak zone detection for tunnel design under water passages
38 Case: 3D model of depth to bedrock for a new train tunnel under the capital of Norway
39 Case: screening for ground risk ahead of tunnel design and construction activities
40 Case: geometrical complex ground model for large industrial construction sites: ultra-high-resolution with shear waves – qualification flow and application
41 Case: identifying weakness zones and geological boundaries across tunnel alignments using airborne electromagnetics
42 Case: delineation of soil type, dam leakage, underground voids, and water flow in tunnels
43 Case: pre-investigations for horizontal directional drilling in Copenhagen
44 Case: mapping depth to bedrock along a planned cable route
45 Case: mapping bedrock profiles for cable landings using seismic refraction and surface waves (MASW)
46 Case: lake bottom investigations with ground penetrating radar (GPR)
47 Case: pre-investigations for pipeline crossing of a stream
48 Case: delineation of palaeokarst features under a proposed tailings facility using ERT, seismic refraction, and micro-gravity
49 Case: the identification of leaks in tailings storage facility impoundment dam walls using ERT and IP
50 Case: groundwater vulnerability assessment for new motorway using ERT
Index
