Date
03 Jun 1988, 10:00 am - 5:30 pm
Abstract
Seven ground anchors were installed for full scale field tests in Taipei Railway Underground Project. The soil at job site can generally be classified as silty clay or clayey silt. The length of the anchors was about 40 m each, including 23 m bond length. The borehole diameter was 125 mm and the designed borehole inclination was 26 degrees downward. Each of the anchors was expected to share approximately 300 to 400 kN of tie-back force to support the diaphragm wall during excavation. Investigation of the borehole inclination was carried out by using horizontal inclinometer. The distribution of skin friction along the bond anchorage was determined from strain gauges applied on the anchoring strands, and the tensile load was monitored by load cells. It was observed that the average borehole direction deviated with an angle of about 1.5 degrees. It has also been found that most of the design load was carried by the first 10 m of the bond length. For a nearest spacing of about 1.5 m between the anchors, the group effect and the stress interaction among them were negligible.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1988 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Li, J. C.; Yao, H. L.; Shi, L. P.; and Shy, B. I., "Behavior of Ground Anchors for Taipei Sedimentary Soils" (1988). International Conference on Case Histories in Geotechnical Engineering. 9.
https://scholarsmine.mst.edu/icchge/2icchge/2icchge-session6/9
Behavior of Ground Anchors for Taipei Sedimentary Soils
Seven ground anchors were installed for full scale field tests in Taipei Railway Underground Project. The soil at job site can generally be classified as silty clay or clayey silt. The length of the anchors was about 40 m each, including 23 m bond length. The borehole diameter was 125 mm and the designed borehole inclination was 26 degrees downward. Each of the anchors was expected to share approximately 300 to 400 kN of tie-back force to support the diaphragm wall during excavation. Investigation of the borehole inclination was carried out by using horizontal inclinometer. The distribution of skin friction along the bond anchorage was determined from strain gauges applied on the anchoring strands, and the tensile load was monitored by load cells. It was observed that the average borehole direction deviated with an angle of about 1.5 degrees. It has also been found that most of the design load was carried by the first 10 m of the bond length. For a nearest spacing of about 1.5 m between the anchors, the group effect and the stress interaction among them were negligible.
