Abstract
In order to investigate the effect of stress history on in-situ test results in granular sediments, a series of CPTs and DMTs are performed on Busan sand prepared in the calibration chamber. KD is found to be the most sensitive to the stress history among CPT and DMT measurements. ED and qc are observed to be similarly affected by the stress history and, therefore, the ED-qc relation appears to be almost independent of the stress history. The KD-DR relation established without considering the stress history is likely to overestimate the relative density of OC sand. It is shown that the existence of the pre-stress of the granular sediment can be indirectly recognized by an estimation of the relative density larger than 100% when using the KD-σvσ-DR relation suggested for NC sand. Although qc/σvσ-KD/K0 and ED/σvσ-KD/K0 relations are heavily influenced by the stress history, qc/σmσ-KD/K0 and ED/σmσ-KD/K0 relations are observed to be independent of the stress history. Based on these relations, charts to evaluate the K0 value from qc and/or DMT indices are developed for both NC and OC sands. The design chart based on ED/σmσ-KD/K0 and ED/σvσ-KD/K0 relations is expected to be practically useful as the usage of this chart requires only DMT indices. The developed design charts are applicable to Busan sand but different sets of equations and charts may be developed for other sands.
| Original language | English |
|---|---|
| Pages (from-to) | 259-265 |
| Number of pages | 7 |
| Journal | Engineering Geology |
| Volume | 117 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 2011 Feb 2 |
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Keywords
- Cone resistance
- Dilatometer modulus
- Horizontal stress index
- K estimation
- Stress history
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Geology
Cite this
Effect of stress history on CPT and DMT results in sand. / Lee, Moon Joo; Choi, Sung Kun; Kim, Min Tae; Lee, Woojin.
In: Engineering Geology, Vol. 117, No. 3-4, 02.02.2011, p. 259-265.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of stress history on CPT and DMT results in sand
AU - Lee, Moon Joo
AU - Choi, Sung Kun
AU - Kim, Min Tae
AU - Lee, Woojin
PY - 2011/2/2
Y1 - 2011/2/2
N2 - In order to investigate the effect of stress history on in-situ test results in granular sediments, a series of CPTs and DMTs are performed on Busan sand prepared in the calibration chamber. KD is found to be the most sensitive to the stress history among CPT and DMT measurements. ED and qc are observed to be similarly affected by the stress history and, therefore, the ED-qc relation appears to be almost independent of the stress history. The KD-DR relation established without considering the stress history is likely to overestimate the relative density of OC sand. It is shown that the existence of the pre-stress of the granular sediment can be indirectly recognized by an estimation of the relative density larger than 100% when using the KD-σvσ-DR relation suggested for NC sand. Although qc/σvσ-KD/K0 and ED/σvσ-KD/K0 relations are heavily influenced by the stress history, qc/σmσ-KD/K0 and ED/σmσ-KD/K0 relations are observed to be independent of the stress history. Based on these relations, charts to evaluate the K0 value from qc and/or DMT indices are developed for both NC and OC sands. The design chart based on ED/σmσ-KD/K0 and ED/σvσ-KD/K0 relations is expected to be practically useful as the usage of this chart requires only DMT indices. The developed design charts are applicable to Busan sand but different sets of equations and charts may be developed for other sands.
AB - In order to investigate the effect of stress history on in-situ test results in granular sediments, a series of CPTs and DMTs are performed on Busan sand prepared in the calibration chamber. KD is found to be the most sensitive to the stress history among CPT and DMT measurements. ED and qc are observed to be similarly affected by the stress history and, therefore, the ED-qc relation appears to be almost independent of the stress history. The KD-DR relation established without considering the stress history is likely to overestimate the relative density of OC sand. It is shown that the existence of the pre-stress of the granular sediment can be indirectly recognized by an estimation of the relative density larger than 100% when using the KD-σvσ-DR relation suggested for NC sand. Although qc/σvσ-KD/K0 and ED/σvσ-KD/K0 relations are heavily influenced by the stress history, qc/σmσ-KD/K0 and ED/σmσ-KD/K0 relations are observed to be independent of the stress history. Based on these relations, charts to evaluate the K0 value from qc and/or DMT indices are developed for both NC and OC sands. The design chart based on ED/σmσ-KD/K0 and ED/σvσ-KD/K0 relations is expected to be practically useful as the usage of this chart requires only DMT indices. The developed design charts are applicable to Busan sand but different sets of equations and charts may be developed for other sands.
KW - Cone resistance
KW - Dilatometer modulus
KW - Horizontal stress index
KW - K estimation
KW - Stress history
UR - http://www.scopus.com/inward/record.url?scp=78651352352&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78651352352&partnerID=8YFLogxK
U2 - 10.1016/j.enggeo.2010.11.005
DO - 10.1016/j.enggeo.2010.11.005
M3 - Article
AN - SCOPUS:78651352352
VL - 117
SP - 259
EP - 265
JO - Engineering Geology
JF - Engineering Geology
SN - 0013-7952
IS - 3-4
ER -