Alternative Title
Paper No. 7.25
Location
St. Louis, Missouri
Date
10 Mar 1998, 2:30 pm - 5:30 pm
Abstract
Excavation support is commonly provided using soil-nailed walls or tie-hack walls. This paper describes two case histories where nails and anchors where installed using a hollow reinforcing bar and a disposable drill bit. A lean grout was pumped through the reinforcing bar as it was driven into the ground. This process created a reinforced grout column with a diameter of about 150 mm. This procedure reduced the time of installation and resulted in cost savings of about 25% in comparison with conventional procedures. The procedure was used successfully to install nails in sandy gravels and silty sands. It was also used successfully to install tic-back anchors and the measured horizontal and vertical movements behind the wall were well within acceptable limits. Pull-out tests indicated that the ultimate pull-out resistance of the nails/anchors was between 58.3 to 65.6 kN/m (4 to 4.5 kips/ft) in the gravelly sands and 49.6 kN/m to 56.8 kN/m (3.4 to 3.9 kips/ft) in the silly sand (30%) tines. The soil-nail approach was not found to be practical where thick sequences of clean sands were encountered due to surface raveling and caving.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1998 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
Rollins, Kyle; Murphy, Kenneth; Dustin, Shaun; and Bishop, Jerry, "Soil-nailed and the Tie-back Wall Construction Using Hollow Nails" (1998). International Conference on Case Histories in Geotechnical Engineering. 19.
https://scholarsmine.mst.edu/icchge/4icchge/4icchge-session07/19
Soil-nailed and the Tie-back Wall Construction Using Hollow Nails
St. Louis, Missouri
Excavation support is commonly provided using soil-nailed walls or tie-hack walls. This paper describes two case histories where nails and anchors where installed using a hollow reinforcing bar and a disposable drill bit. A lean grout was pumped through the reinforcing bar as it was driven into the ground. This process created a reinforced grout column with a diameter of about 150 mm. This procedure reduced the time of installation and resulted in cost savings of about 25% in comparison with conventional procedures. The procedure was used successfully to install nails in sandy gravels and silty sands. It was also used successfully to install tic-back anchors and the measured horizontal and vertical movements behind the wall were well within acceptable limits. Pull-out tests indicated that the ultimate pull-out resistance of the nails/anchors was between 58.3 to 65.6 kN/m (4 to 4.5 kips/ft) in the gravelly sands and 49.6 kN/m to 56.8 kN/m (3.4 to 3.9 kips/ft) in the silly sand (30%) tines. The soil-nail approach was not found to be practical where thick sequences of clean sands were encountered due to surface raveling and caving.
