Abstract
The purpose of this study is to investigate the effect of pressurized grouting on pullout resistance and the group effect of the compression ground anchor by performing pilot-scale laboratory chamber tests and field tests. The laboratory test results show that the enlargement of the anchor body diameter estimated theoretically by combining the cavity expansion theory and grout penetration characteristics matches reasonably well with that obtained from experiments. The required injection time as a function of the coefficient of permeability of the ground is proposed. The results of a series of field anchor pullout tests show that the effect of pressurized grouting is more prominent in a softer ground with a smaller SPT-N value for an increase in both anchor body diameter and pullout resistance. The pressurized grouting effect in comparison with gravitational grouting was found to be almost zero if the SPT-N value is more than 50. Based on experimental results, a new equation to estimate the pullout resistance as a function of the SPT-N 60 value is proposed. In addition, based on in situ group anchor pullout test results, a new group effect equation is proposed.
| Original language | English |
|---|---|
| Pages (from-to) | 939-953 |
| Number of pages | 15 |
| Journal | Canadian Geotechnical Journal |
| Volume | 49 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2012 Jul 1 |
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Keywords
- Compression ground anchor
- Group effect
- Grout consolidation model
- Pressurized grouting
- Pullout resistance
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
Cite this
Effect of pressurized grouting on pullout resistance and group efficiency of compression ground anchor. / Lee, Seok Won; Kim, Tea Seob; Sim, Bo Kyoung; Kim, Jong Sun; Lee, In Mo.
In: Canadian Geotechnical Journal, Vol. 49, No. 8, 01.07.2012, p. 939-953.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of pressurized grouting on pullout resistance and group efficiency of compression ground anchor
AU - Lee, Seok Won
AU - Kim, Tea Seob
AU - Sim, Bo Kyoung
AU - Kim, Jong Sun
AU - Lee, In Mo
PY - 2012/7/1
Y1 - 2012/7/1
N2 - The purpose of this study is to investigate the effect of pressurized grouting on pullout resistance and the group effect of the compression ground anchor by performing pilot-scale laboratory chamber tests and field tests. The laboratory test results show that the enlargement of the anchor body diameter estimated theoretically by combining the cavity expansion theory and grout penetration characteristics matches reasonably well with that obtained from experiments. The required injection time as a function of the coefficient of permeability of the ground is proposed. The results of a series of field anchor pullout tests show that the effect of pressurized grouting is more prominent in a softer ground with a smaller SPT-N value for an increase in both anchor body diameter and pullout resistance. The pressurized grouting effect in comparison with gravitational grouting was found to be almost zero if the SPT-N value is more than 50. Based on experimental results, a new equation to estimate the pullout resistance as a function of the SPT-N 60 value is proposed. In addition, based on in situ group anchor pullout test results, a new group effect equation is proposed.
AB - The purpose of this study is to investigate the effect of pressurized grouting on pullout resistance and the group effect of the compression ground anchor by performing pilot-scale laboratory chamber tests and field tests. The laboratory test results show that the enlargement of the anchor body diameter estimated theoretically by combining the cavity expansion theory and grout penetration characteristics matches reasonably well with that obtained from experiments. The required injection time as a function of the coefficient of permeability of the ground is proposed. The results of a series of field anchor pullout tests show that the effect of pressurized grouting is more prominent in a softer ground with a smaller SPT-N value for an increase in both anchor body diameter and pullout resistance. The pressurized grouting effect in comparison with gravitational grouting was found to be almost zero if the SPT-N value is more than 50. Based on experimental results, a new equation to estimate the pullout resistance as a function of the SPT-N 60 value is proposed. In addition, based on in situ group anchor pullout test results, a new group effect equation is proposed.
KW - Compression ground anchor
KW - Group effect
KW - Grout consolidation model
KW - Pressurized grouting
KW - Pullout resistance
UR - http://www.scopus.com/inward/record.url?scp=84864766394&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84864766394&partnerID=8YFLogxK
U2 - 10.1139/T2012-059
DO - 10.1139/T2012-059
M3 - Article
AN - SCOPUS:84864766394
VL - 49
SP - 939
EP - 953
JO - Canadian Geotechnical Journal
JF - Canadian Geotechnical Journal
SN - 0008-3674
IS - 8
ER -