Deterioration model of ground anchor for slope stability assessment

Tomohiro Hamasaki, Kiyonobu Kasama, Yoshito Maeda

Research output: Contribution to conferencePaper

Abstract

There is a ground anchor technique as one of the earth reinforcements to sustain the stability of the slope, which has been widely used for stabilizing cut slopes in Japan for the last thirty years. As ground anchors are anticipated to be deteriorated by geological environments such as ground water and natural disasters such as earthquake and typhoon, it is recommended to evaluate its performance by regular survey and tests. Moreover, it is believed that old-type anchors have a low protection performance against the corrosion on the surface of old-type anchors. Consequently, it is necessary to evaluate appropriately the damage of anchors as well as the stability of slope reinforced by deteriorated ground anchors. The performance of ground anchors is generally checked by soundness diagnosis, which is the visual check of anchor head, and lift-off tests, which is the loading test to measure a residual stress in anchor. The soundness diagnosis and lift-off test are effective for evaluating the performance of single anchor itself, however, the reliability of the safety assessment between the entire reinforced slope and the performance evaluation for single ground anchor has been questioned. This paper analyzed the reliability of soundness diagnosis based on the past regular surveys and lift-off tests statistically, proposed a deterioration model for single ground anchor using the Weibull distribution and finally assess the stability of reinforced slope with the proposed model.

Original languageEnglish
Pages2461-2464
Number of pages4
DOIs
Publication statusPublished - Jan 1 2015
Event15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015 - Fukuoka, Kyushu, Japan
Duration: Nov 9 2015Nov 13 2015

Other

Other15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015
CountryJapan
CityFukuoka, Kyushu
Period11/9/1511/13/15

Fingerprint

Slope stability
Anchors
slope stability
anchor
Deterioration
deterioration
testing
safety assessment
corrosion
disasters
earthquakes
groundwater
Japan
residual stress
loading test
Weibull distribution
typhoon
natural disaster
Disasters
reinforcement

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Soil Science

Cite this

Hamasaki, T., Kasama, K., & Maeda, Y. (2015). Deterioration model of ground anchor for slope stability assessment. 2461-2464. Paper presented at 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015, Fukuoka, Kyushu, Japan. https://doi.org/10.3208/jgssp.JPN-011

Deterioration model of ground anchor for slope stability assessment. / Hamasaki, Tomohiro; Kasama, Kiyonobu; Maeda, Yoshito.

2015. 2461-2464 Paper presented at 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015, Fukuoka, Kyushu, Japan.

Research output: Contribution to conferencePaper

Hamasaki, T, Kasama, K & Maeda, Y 2015, 'Deterioration model of ground anchor for slope stability assessment', Paper presented at 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015, Fukuoka, Kyushu, Japan, 11/9/15 - 11/13/15 pp. 2461-2464. https://doi.org/10.3208/jgssp.JPN-011
Hamasaki T, Kasama K, Maeda Y. Deterioration model of ground anchor for slope stability assessment. 2015. Paper presented at 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015, Fukuoka, Kyushu, Japan. https://doi.org/10.3208/jgssp.JPN-011
Hamasaki, Tomohiro ; Kasama, Kiyonobu ; Maeda, Yoshito. / Deterioration model of ground anchor for slope stability assessment. Paper presented at 15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015, Fukuoka, Kyushu, Japan.4 p.
@conference{fad123d94d374e5ba7fbcc5f3a49dde4,
title = "Deterioration model of ground anchor for slope stability assessment",
abstract = "There is a ground anchor technique as one of the earth reinforcements to sustain the stability of the slope, which has been widely used for stabilizing cut slopes in Japan for the last thirty years. As ground anchors are anticipated to be deteriorated by geological environments such as ground water and natural disasters such as earthquake and typhoon, it is recommended to evaluate its performance by regular survey and tests. Moreover, it is believed that old-type anchors have a low protection performance against the corrosion on the surface of old-type anchors. Consequently, it is necessary to evaluate appropriately the damage of anchors as well as the stability of slope reinforced by deteriorated ground anchors. The performance of ground anchors is generally checked by soundness diagnosis, which is the visual check of anchor head, and lift-off tests, which is the loading test to measure a residual stress in anchor. The soundness diagnosis and lift-off test are effective for evaluating the performance of single anchor itself, however, the reliability of the safety assessment between the entire reinforced slope and the performance evaluation for single ground anchor has been questioned. This paper analyzed the reliability of soundness diagnosis based on the past regular surveys and lift-off tests statistically, proposed a deterioration model for single ground anchor using the Weibull distribution and finally assess the stability of reinforced slope with the proposed model.",
author = "Tomohiro Hamasaki and Kiyonobu Kasama and Yoshito Maeda",
year = "2015",
month = "1",
day = "1",
doi = "10.3208/jgssp.JPN-011",
language = "English",
pages = "2461--2464",
note = "15th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2015 ; Conference date: 09-11-2015 Through 13-11-2015",

}

TY - CONF

T1 - Deterioration model of ground anchor for slope stability assessment

AU - Hamasaki, Tomohiro

AU - Kasama, Kiyonobu

AU - Maeda, Yoshito

PY - 2015/1/1

Y1 - 2015/1/1

N2 - There is a ground anchor technique as one of the earth reinforcements to sustain the stability of the slope, which has been widely used for stabilizing cut slopes in Japan for the last thirty years. As ground anchors are anticipated to be deteriorated by geological environments such as ground water and natural disasters such as earthquake and typhoon, it is recommended to evaluate its performance by regular survey and tests. Moreover, it is believed that old-type anchors have a low protection performance against the corrosion on the surface of old-type anchors. Consequently, it is necessary to evaluate appropriately the damage of anchors as well as the stability of slope reinforced by deteriorated ground anchors. The performance of ground anchors is generally checked by soundness diagnosis, which is the visual check of anchor head, and lift-off tests, which is the loading test to measure a residual stress in anchor. The soundness diagnosis and lift-off test are effective for evaluating the performance of single anchor itself, however, the reliability of the safety assessment between the entire reinforced slope and the performance evaluation for single ground anchor has been questioned. This paper analyzed the reliability of soundness diagnosis based on the past regular surveys and lift-off tests statistically, proposed a deterioration model for single ground anchor using the Weibull distribution and finally assess the stability of reinforced slope with the proposed model.

AB - There is a ground anchor technique as one of the earth reinforcements to sustain the stability of the slope, which has been widely used for stabilizing cut slopes in Japan for the last thirty years. As ground anchors are anticipated to be deteriorated by geological environments such as ground water and natural disasters such as earthquake and typhoon, it is recommended to evaluate its performance by regular survey and tests. Moreover, it is believed that old-type anchors have a low protection performance against the corrosion on the surface of old-type anchors. Consequently, it is necessary to evaluate appropriately the damage of anchors as well as the stability of slope reinforced by deteriorated ground anchors. The performance of ground anchors is generally checked by soundness diagnosis, which is the visual check of anchor head, and lift-off tests, which is the loading test to measure a residual stress in anchor. The soundness diagnosis and lift-off test are effective for evaluating the performance of single anchor itself, however, the reliability of the safety assessment between the entire reinforced slope and the performance evaluation for single ground anchor has been questioned. This paper analyzed the reliability of soundness diagnosis based on the past regular surveys and lift-off tests statistically, proposed a deterioration model for single ground anchor using the Weibull distribution and finally assess the stability of reinforced slope with the proposed model.

UR - http://www.scopus.com/inward/record.url?scp=84971379082&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84971379082&partnerID=8YFLogxK

U2 - 10.3208/jgssp.JPN-011

DO - 10.3208/jgssp.JPN-011

M3 - Paper

AN - SCOPUS:84971379082

SP - 2461

EP - 2464

ER -