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Foundation analysis and design
01 Jan 1968-
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Abstract: Keywords: Fondation ; Mur de soutenement ; Pieux ; Capacite portante ; Ancrage ; Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08
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17 Mar 2015
TL;DR: In this article, the authors used helical piles as the foundation at select tower locations on the XCEL Energy Stinson-Bayfront Line 3315 32.1 mile Re-Build 115 kV transmission line project.
Abstract: The foundations for most transmission line structures constructed in North America today are drilled shafts. However, drilled shafts are not always a suitable foundation choice. This paper details one example where helical piles were used as the foundation at select tower locations on the XCEL Energy Stinson-Bayfront Line 3315 32.1 Mile Re-Build 115 kV transmission line project. The structures were steel H-Frames, made by Thomas & Betts Meyer. The tangent structures were specified as direct embedded, and the running angle and dead-end structures were either helical piles or drilled shafts. The line is located in a remote area of northwest Wisconsin near Duluth, MN. Helical piles were used at tower locations with poor road access, and in areas considered environmentally sensitive where large vehicles would destroy the landscape and vegetation. Xcel, Hubbell / CHANCE, and Thomas & Betts teamed together to design this project. Xcel Energy produced the load and design drawings, Thomas & Betts designed the H-Frame Pole structures and the pile transition connections, and Hubbell / CHANCE designed the helical pile foundations. Prior to line construction, full-scale load tests of the helical pile / connection were performed at the Thomas and Betts Structure Test Facility located in Hager City, Wisconsin. The running angle and dead-end pile and transition systems were successfully loaded and tested to values that meet or exceed the ultimate design structure ground- line reactions. These results are presented. The piles, tested together in a multi-pile group, were subjected to a combination of axial tension, compression, and lateral shear. In addition, four full-scale load tests were conducted on the line right-of-way at the actual tower locations. The tests consisted of pile penetration tests, axial tension, and lateral shear tests. These test results are compared to the theoretical capacity of the piles based on site soil type and strength. The results of the tests allowed the helical pile design to be adjusted prior to start of construction to provide the contractor with minimum depth and installation torque requirements.
01 Jan 2017
Cites background from "Foundation analysis and design"
...As the casing is extracted the fresh concrete flows outward, forming a more intimate bond to the surrounding soil and underlying rock in the rock socket (Bowles, 1996)....
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01 Jan 2021
TL;DR: In this paper, the methodology adopted in soil support for deep excavation carried out for installation of press foundation in live working mechanical shop with space restriction and variable soil conditions was discussed, and the method adopted was the cheapest of available alternatives.
Abstract: This paper discusses the methodology adopted in soil support for deep excavation carried out for installation of press foundation in live working mechanical shop with space restriction and variable soil conditions. The method adopted was the cheapest of available alternatives.