Publication Abstract

Proceedings - Fourth International Conference - Piling and Deep Foundations, 1991, Stresa, Italy, (DFI)

14 The Performance of Bored Piles, used as Foundation and Retaining Walls, in the Middle Coal Measures
H. Mirzabaigian & D.C. Curtis; Ove Arup & Partners, Manchester, UK

A multi - story shopping center with service basement has been constructed which included using bored cast insitu concrete piles both to support structural loads and to form walls to uphold the basement during construction. The piles were constructed in the rocks of the Middle Coal Measures comprising interbedded mudstones, siltstones, sandstones and coal seams. Three foundation piles were load tested and six inclinometers were installed in wall piles to monitor movement during basement excavation and construction. Pile design for both foundations and walls was based on parameters derived from Standard Penetration Tests. Comparisons are made of predicted pile capacities and wall movements with those obtained from pile testing and wall inclinometer monitoring. This indicates that correlations of design parameters from Standard Penetration Tests provide a satisfactory means of predicting pile behavior in the Middle Coal Measures. It is demonstrated that numerical methods can give good predictions of wall movement.

 article #454; publication #37 (IC-1991-IT)