Evaluation of CPT- based ultimate lateral pile resistance in sand

Hongyu Qin; Weidong Dong Guo

Evaluation of CPT- based ultimate lateral pile resistance in sand

Hongyu Qin, Weidong Dong Guo

College of Science and Engineering

Research output: Contribution to conference › Paper › peer-review

1 Citation (Scopus)

Abstract

The CPT-q_c has been used quite successfully to estimate the shaft friction f_s along vertically loaded piles. This prompts the question of how to use the q_c to estimate the ultimate laterally loaded pile resistance p_u, as the correlation between q_c and p_u is not as strong as that between q_c and f_s. In this paper, modulus of subgrade reaction k and the p_u profile were deduced using closed-form solutions and measured response of eight laterally loaded rigid piles tested in-situ and in 1g model tank, respectively. A good comparison is made for each test using a constant k and linear increasing p_u. The deduced values of k and p_u are consistent with those gained previously for 57 lateral piles. Particularly, the gradient of p_u over q_c-average for the short piles is equal to (1.8-8.8)%, which is only a fraction of other suggestions. This difference necessitates further study on the correlation between q_c and p_u.

Original language	English
Pages	1265-1270
Number of pages	6
Publication status	Published - 1 Jan 2016
Event	The 5th International Conference on Geotechnical and Geophysical Site Characterisation - Duration: 5 Sept 2016 → …

Conference

Conference	The 5th International Conference on Geotechnical and Geophysical Site Characterisation
Period	5/09/16 → …

Cite this

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title = "Evaluation of CPT- based ultimate lateral pile resistance in sand",

abstract = "The CPT-qc has been used quite successfully to estimate the shaft friction fs along vertically loaded piles. This prompts the question of how to use the qc to estimate the ultimate laterally loaded pile resistance pu, as the correlation between qc and pu is not as strong as that between qc and fs. In this paper, modulus of subgrade reaction k and the pu profile were deduced using closed-form solutions and measured response of eight laterally loaded rigid piles tested in-situ and in 1g model tank, respectively. A good comparison is made for each test using a constant k and linear increasing pu. The deduced values of k and pu are consistent with those gained previously for 57 lateral piles. Particularly, the gradient of pu over qc-average for the short piles is equal to (1.8-8.8)%, which is only a fraction of other suggestions. This difference necessitates further study on the correlation between qc and pu.",

author = "Hongyu Qin and Guo, {Weidong Dong}",

year = "2016",

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note = "The 5th International Conference on Geotechnical and Geophysical Site Characterisation ; Conference date: 05-09-2016",

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T1 - Evaluation of CPT- based ultimate lateral pile resistance in sand

AU - Qin, Hongyu

AU - Guo, Weidong Dong

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The CPT-qc has been used quite successfully to estimate the shaft friction fs along vertically loaded piles. This prompts the question of how to use the qc to estimate the ultimate laterally loaded pile resistance pu, as the correlation between qc and pu is not as strong as that between qc and fs. In this paper, modulus of subgrade reaction k and the pu profile were deduced using closed-form solutions and measured response of eight laterally loaded rigid piles tested in-situ and in 1g model tank, respectively. A good comparison is made for each test using a constant k and linear increasing pu. The deduced values of k and pu are consistent with those gained previously for 57 lateral piles. Particularly, the gradient of pu over qc-average for the short piles is equal to (1.8-8.8)%, which is only a fraction of other suggestions. This difference necessitates further study on the correlation between qc and pu.

AB - The CPT-qc has been used quite successfully to estimate the shaft friction fs along vertically loaded piles. This prompts the question of how to use the qc to estimate the ultimate laterally loaded pile resistance pu, as the correlation between qc and pu is not as strong as that between qc and fs. In this paper, modulus of subgrade reaction k and the pu profile were deduced using closed-form solutions and measured response of eight laterally loaded rigid piles tested in-situ and in 1g model tank, respectively. A good comparison is made for each test using a constant k and linear increasing pu. The deduced values of k and pu are consistent with those gained previously for 57 lateral piles. Particularly, the gradient of pu over qc-average for the short piles is equal to (1.8-8.8)%, which is only a fraction of other suggestions. This difference necessitates further study on the correlation between qc and pu.

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M3 - Paper

SP - 1265

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T2 - The 5th International Conference on Geotechnical and Geophysical Site Characterisation

Y2 - 5 September 2016

ER -

Evaluation of CPT- based ultimate lateral pile resistance in sand

Abstract

Conference

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