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Design and in situ testing of a piez...

Farrell, Robert,

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Design and in situ testing of a piezometer system to measure earthquake -induced pore -pressure changes /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Design and in situ testing of a piezometer system to measure earthquake -induced pore -pressure changes // Robert Farrell.
作者:	Farrell, Robert,
面頁冊數:	1 electronic resource (269 pages)
附註:	Source: Dissertations Abstracts International, Volume: 65-02, Section: B.
Contained By:	Dissertations Abstracts International65-02B.
標題:	Civil engineering. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3083728
ISBN:	9780496315352

Design and in situ testing of a piezometer system to measure earthquake -induced pore -pressure changes /
Farrell, Robert,

Design and in situ testing of a piezometer system to measure earthquake -induced pore -pressure changes /Robert Farrell. - 1 electronic resource (269 pages)

Source: Dissertations Abstracts International, Volume: 65-02, Section: B.

Pore pressure changes have been measured in fine sand deposits that are known to have liquefied during earthquakes. Some of the measured signals have not been similar to what was expected during earthquake-induced liquefaction. Using artificially generated signals, several investigators have attempted to determine if existing piezometer fields designed to measure earthquake induced pore pressure changes are operating correctly. The signals generated during one investigation were not similar to those expected from an earthquake. In another investigation, while the generated signals were similar to ones expected from an earthquake, the results were not reproducible; the generated signals damaged the aquifer being tested and damaged or destroyed some piezometers being tested. This thesis describes the design and field-testing of a piezometer system that allows in situ testing of the screens on the piezometer, and in situ calibration of the transducer. An intergral part of this system is a signal generating system that generates a signal with frequencies similar to those expected from an earthquake. The generated signal has been detected in piezometers at least 20 feet from the source and at depths of at least 15 feet deeper than the source. The signal has been demonstrated to be reproducible through time with no measurable damage to the aquifer or the piezometers. It has been possible to investigate the ability of an existing piezometer field to detect earthquake-like signals and to demonstrate changes over time of some piezometers in their ability to detect earthquake-like signals. A detailed procedure for installing a piezometer array for liquefaction studies is presented.

English

ISBN: 9780496315352Subjects--Topical Terms:

860360
Civil engineering.
Subjects--Index Terms:

Earthquake-induced

Design and in situ testing of a piezometer system to measure earthquake -induced pore -pressure changes /
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520 $a Pore pressure changes have been measured in fine sand deposits that are known to have liquefied during earthquakes. Some of the measured signals have not been similar to what was expected during earthquake-induced liquefaction. Using artificially generated signals, several investigators have attempted to determine if existing piezometer fields designed to measure earthquake induced pore pressure changes are operating correctly. The signals generated during one investigation were not similar to those expected from an earthquake. In another investigation, while the generated signals were similar to ones expected from an earthquake, the results were not reproducible; the generated signals damaged the aquifer being tested and damaged or destroyed some piezometers being tested. This thesis describes the design and field-testing of a piezometer system that allows in situ testing of the screens on the piezometer, and in situ calibration of the transducer. An intergral part of this system is a signal generating system that generates a signal with frequencies similar to those expected from an earthquake. The generated signal has been detected in piezometers at least 20 feet from the source and at depths of at least 15 feet deeper than the source. The signal has been demonstrated to be reproducible through time with no measurable damage to the aquifer or the piezometers. It has been possible to investigate the ability of an existing piezometer field to detect earthquake-like signals and to demonstrate changes over time of some piezometers in their ability to detect earthquake-like signals. A detailed procedure for installing a piezometer array for liquefaction studies is presented.
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653 $a Liquefaction
653 $a Piezometer
653 $a Pore-pressure
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710 2 $a University of New Hampshire. $e degree granting institution. $3 3819053
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