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Analyses and Performance Assessment

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Geotechnical Instrumentation and Applications

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Abstract

Monitored data using geotechnical instrument are required to be analysed to obtain the necessary indications of achievement, target/trigger or alert warnings, etc. Using these outputs from analyses, appropriate decisions related to remedial actions or acceptances could be made.

Measurements of achievement, definitions of alert and target/trigger levels are different for each instrument. These will be explained in more details for the following types of issues in the following sections of this chapter.

  • Settlement and consolidation

  • Lateral displacement and slope stability

  • Earth pressure

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Abbreviations

S :

Immediate settlement

H :

Immediate heave

E :

Elastic modulus

S :

Total settlement

C c :

Compression index

C r :

Recompression index

e o :

Natural void ratio

\( {\sigma}_v^{\prime } \) :

Initial effective stress

\( {\sigma}_y^{\prime } \) :

Yield stress

Δσ′:

Additional stress

Γb:

is bulk unit weight of fill material

H dr :

Drainage path and for single drainage, it is equivalent to the thickness of layer, and for double drainage, it is half of the thickness of layer.

t :

Duration of time for consolidation

T v :

Time factor

U v :

Degree of consolidation

U i :

Initial excess pore pressure

U t :

Excess pore pressure at time t

S t :

Settlement at time t

S α :

Ultimate primary settlement

U (%):

Degree of consolidation

F S :

Factor of safety

M R :

Resisting moment

M D :

Driving moment

ϕ :

Available strength

ι :

Required strength

K 0nc :

Earth pressure under at rest condition For normally consolidated fill

K 0oc :

Earth pressure under at rest condition For overconsolidated fill

Ka:

Active earth pressure

Kp:

Passive earth pressure

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Authors and Affiliations

  1. Bo & Associates Inc., Tottenham, ON, Canada

    Myint Win Bo

  2. GEOKON, Lebanon, NH, USA

    Jeffrey Barrett

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  1. Myint Win Bo
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  2. Jeffrey Barrett
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Bo, M.W., Barrett, J. (2023). Analyses and Performance Assessment. In: Geotechnical Instrumentation and Applications. Springer, Cham. https://doi.org/10.1007/978-3-031-34275-2_7

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