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Assessment of matrix soil improvemen...

Zeng, Weixi.

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Assessment of matrix soil improvement using displacement aggregate piers.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Assessment of matrix soil improvement using displacement aggregate piers./
Author:	Zeng, Weixi.
Description:	170 p.
Notes:	Source: Masters Abstracts International, Volume: 48-05, page: 3176.
Contained By:	Masters Abstracts International48-05.
Subject:	Geotechnology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1476359
ISBN:	9781109777451

Assessment of matrix soil improvement using displacement aggregate piers.
Zeng, Weixi.

Assessment of matrix soil improvement using displacement aggregate piers. - 170 p.

Source: Masters Abstracts International, Volume: 48-05, page: 3176.

Thesis (M.S.)--Iowa State University, 2010.

Many ground improvement techniques are subjected to the limitations of cost, safety and construction time. Innovations in industry are resulting in new technologies and construction methods to overcome these limitations. Displacement Aggregate Pier (DAP) technology developed by Geopier(TM) Foundation Company is one such technology and is the focus of this research. Specifically, the influence of pier installation on matrix soil densification is addressed based on evaluation of several full-scale field studies. Cases histories are presented describing the use of cone penetration test (CPT) and standard penetration test (SPT) to investigate matrix soil densification for a range of ground conditions. Additionally, full scale load tests were studies for single piers and pier groups to confirm the current design approach. Data from sixteen of sites were analyzed. Although site specific analysis reveals the unique behavior of IRAP elements, an effort was made to combine data from multiple sites to investigate general relationships between matrix soil densification and soil type, depth, initial relative density, pier spacing, radial distance, groundwater table locations and soil strata. Key findings from this study show that ground densification is highest for matrix soils with less than 20% fines and that the relative density increases for groups of piers and in particular for sandy matrix soils. Evaluations of group effective factor, improvement index, ground modification and settlement are also presented in this research. Simplied design tables presenting change the CPT tip resistance for individual DAPs and group of DAPs are present as one outcome from this study.

ISBN: 9781109777451Subjects--Topical Terms:

1018558
Geotechnology.

Assessment of matrix soil improvement using displacement aggregate piers.
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020 $a 9781109777451
035 $a (UMI)AAI1476359
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040 $a UMI $c UMI
100 1 $a Zeng, Weixi. $3 1671768
245 1 0 $a Assessment of matrix soil improvement using displacement aggregate piers.
300 $a 170 p.
500 $a Source: Masters Abstracts International, Volume: 48-05, page: 3176.
500 $a Adviser: David J. White.
502 $a Thesis (M.S.)--Iowa State University, 2010.
520 $a Many ground improvement techniques are subjected to the limitations of cost, safety and construction time. Innovations in industry are resulting in new technologies and construction methods to overcome these limitations. Displacement Aggregate Pier (DAP) technology developed by Geopier(TM) Foundation Company is one such technology and is the focus of this research. Specifically, the influence of pier installation on matrix soil densification is addressed based on evaluation of several full-scale field studies. Cases histories are presented describing the use of cone penetration test (CPT) and standard penetration test (SPT) to investigate matrix soil densification for a range of ground conditions. Additionally, full scale load tests were studies for single piers and pier groups to confirm the current design approach. Data from sixteen of sites were analyzed. Although site specific analysis reveals the unique behavior of IRAP elements, an effort was made to combine data from multiple sites to investigate general relationships between matrix soil densification and soil type, depth, initial relative density, pier spacing, radial distance, groundwater table locations and soil strata. Key findings from this study show that ground densification is highest for matrix soils with less than 20% fines and that the relative density increases for groups of piers and in particular for sandy matrix soils. Evaluations of group effective factor, improvement index, ground modification and settlement are also presented in this research. Simplied design tables presenting change the CPT tip resistance for individual DAPs and group of DAPs are present as one outcome from this study.
590 $a School code: 0097.
650 4 $a Geotechnology. $3 1018558
650 4 $a Engineering, Geological. $3 1035566
650 4 $a Engineering, Civil. $3 783781
690 $a 0428
690 $a 0466
690 $a 0543
710 2 $a Iowa State University. $b Civil, Construction, and Environmental Engineering. $3 1022221
773 0 $t Masters Abstracts International $g 48-05.
790 1 0 $a White, David J., $e advisor
790 1 0 $a Schaefer, Vernon R. $e committee member
790 1 0 $a Strong, Kelly C. $e committee member
790 $a 0097
791 $a M.S.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1476359