Abstract
A new earth pressure equation considering the arching effect in c-φ soils was proposed for the accurate calculation of earth pressure on circular vertical shafts. The arching effect and the subsequent load recovery phenomenon occurring due to multi-step excavation were quantitatively investigated through laboratory tests. The new earth pressure equation was verified by comparing the test results with the earth pressures predicted by new equation in various soil conditions. Resulting from testing by using multi-step excavation, the arching effect and load recovery were clearly observed. The test results in c-φ soil showed that even a small amount of cohesion can cause the earth pressure to decrease significantly. Therefore, predicting earth pressure without considering such cohesion can lead to overestimation of earth pressure. The test results in various ground conditions demonstrated that the newly proposed equation, which enables consideration of cohesion as appropriate, is the most reliable equation for predicting earth pressure in both φ soil and c-φ soil. The comparison of the theoretical equations with the field data measured on a real construction site also highlighted the best-fitness of the theoretical equation in predicting earth pressure.
| Original language | English |
|---|---|
| Pages (from-to) | 879-896 |
| Number of pages | 18 |
| Journal | Geomechanics and Engineering |
| Volume | 11 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2016 Dec 1 |
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Keywords
- Active earth pressure
- Arching effect
- Cohesion
- Vertical shaft
- Wall friction
ASJC Scopus subject areas
- Civil and Structural Engineering
- Geotechnical Engineering and Engineering Geology
Cite this
Earth pressure on a vertical shaft considering the arching effect in c-φ soil. / Lee, In Mo; Kim, Do Hoon; Kim, Kyoung Yul; Lee, Seok Won.
In: Geomechanics and Engineering, Vol. 11, No. 6, 01.12.2016, p. 879-896.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Earth pressure on a vertical shaft considering the arching effect in c-φ soil
AU - Lee, In Mo
AU - Kim, Do Hoon
AU - Kim, Kyoung Yul
AU - Lee, Seok Won
PY - 2016/12/1
Y1 - 2016/12/1
N2 - A new earth pressure equation considering the arching effect in c-φ soils was proposed for the accurate calculation of earth pressure on circular vertical shafts. The arching effect and the subsequent load recovery phenomenon occurring due to multi-step excavation were quantitatively investigated through laboratory tests. The new earth pressure equation was verified by comparing the test results with the earth pressures predicted by new equation in various soil conditions. Resulting from testing by using multi-step excavation, the arching effect and load recovery were clearly observed. The test results in c-φ soil showed that even a small amount of cohesion can cause the earth pressure to decrease significantly. Therefore, predicting earth pressure without considering such cohesion can lead to overestimation of earth pressure. The test results in various ground conditions demonstrated that the newly proposed equation, which enables consideration of cohesion as appropriate, is the most reliable equation for predicting earth pressure in both φ soil and c-φ soil. The comparison of the theoretical equations with the field data measured on a real construction site also highlighted the best-fitness of the theoretical equation in predicting earth pressure.
AB - A new earth pressure equation considering the arching effect in c-φ soils was proposed for the accurate calculation of earth pressure on circular vertical shafts. The arching effect and the subsequent load recovery phenomenon occurring due to multi-step excavation were quantitatively investigated through laboratory tests. The new earth pressure equation was verified by comparing the test results with the earth pressures predicted by new equation in various soil conditions. Resulting from testing by using multi-step excavation, the arching effect and load recovery were clearly observed. The test results in c-φ soil showed that even a small amount of cohesion can cause the earth pressure to decrease significantly. Therefore, predicting earth pressure without considering such cohesion can lead to overestimation of earth pressure. The test results in various ground conditions demonstrated that the newly proposed equation, which enables consideration of cohesion as appropriate, is the most reliable equation for predicting earth pressure in both φ soil and c-φ soil. The comparison of the theoretical equations with the field data measured on a real construction site also highlighted the best-fitness of the theoretical equation in predicting earth pressure.
KW - Active earth pressure
KW - Arching effect
KW - Cohesion
KW - Vertical shaft
KW - Wall friction
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UR - http://www.scopus.com/inward/citedby.url?scp=85006869804&partnerID=8YFLogxK
U2 - 10.12989/gae.2016.11.6.879
DO - 10.12989/gae.2016.11.6.879
M3 - Article
VL - 11
SP - 879
EP - 896
JO - Geomechanics and Engineering
JF - Geomechanics and Engineering
SN - 2005-307X
IS - 6
ER -