1. AASHTO LRFD bridge design specifications;AASHTO,2010
2. Lateral loading of a pile in layered soil using the strain wedge model;Ashour;J Geotech Geoenviron Eng,1998
3. Foundations and slopes;Atkinson,1981
4. Trenching and shoring manual;Caltrans,2011
5. Caltrans reference manual for design of earth retaining structures;Caltrans,2013