Model Tests on Single Batter Piles Subjected to Lateral Soil Movement

Osamah Al-Salih,I.Q Al-Abboodi,T T Sabbagh,Wisam Alawadi

doi:10.19026/rjaset.16.5995

Abstract

A series of laboratory tests have been carried out to investigate the lateral response of battered piles under lateral soil movement. Model tests were carried out using instrumented rigid aluminium piles. The piles were embedded in homogeneous sand soil at batter angles β = 0°, ±10° and ±20° were subjected to two types of lateral soil movement profile. The results obtained from the study are presented in terms of the bending moment, shear force, soil reaction, pile rotation and lateral deflections along the length of the batter pile. The results of model tests on single vertical and batter piles under horizontal loads showed that the batter angle (β) significantly influenced the response of the batter piles. Regardless of the value of sand density, bending moment and deflection with batter angles β = +10° or positive batter piles were higher compared then vertical piles and negative batter piles.

Highlights

Effect of soil displacement on pile foundation nearby is of great importance in geotechnical projects such as tunnelling, pit excavation, surcharge load and slope engineering
Effect of batter angle on bending moment: In order to investigate the influence of batter angle (β) on the batter pile response, five tests were conducted on the 16 mm diameter pile and subjected to rectangular loading block at sand density (γ) of 15.5 KN/m3 with different angle of inclination (β = 0, ±10 and ±20)
According to shear force develops at a depth of 100 mm (0.33 L), while the maximum positive shear force occurs at a depth of 250 mm (0.83 L)

Summary

Introduction

Effect of soil displacement on pile foundation nearby is of great importance in geotechnical projects such as tunnelling, pit excavation, surcharge load and slope engineering. Analyses of laterally loaded piles of various stiffnesses in homogeneous elastic soils indicate that free head piles may be considered as a rigid for practical purposes if their relative stiffness Kr ≥0.01 and flexible piles if their relative stiffness Kr≤0.01 (Meyerhof, 1979; Meyerhof and Yalcin, 1993). Earlier extensive theoretical and experimental studies have been made to analyse the behaviour of single vertical and batter piles in various soils under various loads, for example Brinch-Hansen (1961), Murthy (1964), Kubo (1965), Award and Petrasovits (1968), Meyerhof and Ranjan (1973), Meyerhof (1979), Poulos and Davis (1980), Meyerhof et al (1981), Takahashi (1985), Meyerhof and Yalcin (1993), Manoppo and Koumoto (1998) and Khari et al (2014). All the above research studies have indicated that the behaviour of the batter piles is more complicated than the vertical piles, further investigation is still needed for gaining a better understanding about the analysis of such piles

Methods

Results

Conclusion