Soil Behavior and Excavation Instrumentation Layout
Publication: 7th FMGM 2007: Field Measurements in Geomechanics
Abstract
During the construction of urban excavations, instruments are installed to monitor ground response to various construction activities, to verify design assumptions and to effectively apply the observational approach. Data collected from these instruments are also used in inverse analyses to develop improved soil models suitable for representing soil response during excavation. This study examines the relationship between various instruments typically used on an excavation project and the quality of information that can be extracted for excavation modeling. A synthetically generated set of instrument measurements using an idealized soil profile are used. Instrument readings considered include inclinometers placed in the support wall and in the retained soil, surface settlement points, extensometers, heave gages, piezometers and strain gauges in the bracing system. Various combinations of measurements are used in a novel inverse analysis approach, SelfSim, to extract the soil behavior. The study shows that in addition to the measurements of lateral wall deflections and surface settlement, measured forces in the struts significantly improve the quality of the extracted soil behavior and the overall predictive capability of the model. Inclinometers placed some distance behind the wall also improve the predictive quality of the model especially small strain soil non-linearity and provide some redundancy to measured settlements.
Get full access to this article
View all available purchase options and get full access to this chapter.
Information & Authors
Information
Published In
Copyright
© 2007 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Construction engineering
- Construction management
- Construction methods
- Data analysis
- Engineering fundamentals
- Equipment and machinery
- Excavation
- Geomechanics
- Geotechnical engineering
- Instrumentation
- Methodology (by type)
- Research methods (by type)
- Soil analysis
- Soil dynamics
- Soil mechanics
- Soil properties
- Soil settlement
- Structural engineering
- Structural members
- Structural systems
- Walls
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.