Publication Abstract

Proceedings of the Deep Mixing 2015 Conference, (DFI)

Field Test of Braced Excavation Supported with Rows of Dry Deep Mixing Columns
Razvan Ignat, Skanska Sweden AB, Royal Institute of Technology, Sweden; Sadek Baker, Skanska Sweden AB, Sweden; Stefan Larsson, Royal Institute of Technology, Sweden

This paper describes the execution of two full-scale field tests where a braced steel sheet pile wall interacting with rows of overlapping dry deep mixing columns was first excavated and then loaded to failure. The aim of the tests is to provide insight of the performance of dry deep mixing column rows located in passive zone and interacting with a retaining structure. The column rows were installed perpendicular to the sheet pile walls with two different area ratios, i.e. different distanced between the column rows. Both tests were extensively instrumented with inclinometers, pore pressure transducers, bellow-hoses, earth pressure gauges and strain gauges mounted on the struts. Results of the performed tests will serve as development of design methods for excavation support with columns.

 article #2079; publication #1013 (DM-2015)