Numerical Assessment of Squeezed Branch Pile in Silty Clay Soil

,R P Bhujade,A I Dhatrak,Department Of Civil Engineering, Sant Gadge Baba Amravati, University, India ,S W Thakare

doi:10.35940/ijeat.c6624.049420

Abstract

Squeezed Branch Pile is derived on the basis of caste in place concrete pile. It has one or more branches along the pile shaft at design depth. Squeezed branch piles are often used in high rise building, transmission tower and in other pile foundations where anticipated uplift or vertical load may cause failure. This pile is one of the excellent options of pile foundation for soft soil and silty soil. The behaviour of Squeezed Branch pile is difficult to explain using simple pile-soil theories or two dimensional numerical analyses because of complicated geometry of pile.In the present numerical analysis, a 3D pile-soil model of conventional circular pile and squeezed branch pile foundations are analysed using MIDAS GTS NX finite element software to find out effectiveness of squeezed branch pile over conventional pile. The aim is to study the performance of Squeezed Branch Pile foundation in silty clay with respect to various parameters such as types of loading, branch diameter, branch spacing and number of branches. Analysis shows that the squeezed branch pile has higher vertical, lateral and uplift load capacity as compared to conventional pile.

Highlights

Pile foundation is considered as one of the widely used foundation technique when it comes to soft soil, which has huge problem of low bearing capacity, excessive and differential settlement
The squeezed branch pile is developed from conventional circular pile, it has one or more enlarged part along the pile shaft.Based on conventional intellection, many new techniques of pile foundation have been developed by changing cross section of conventional pile, providing multi-section to pile for more efficient foundation at lower cost
Squeezed branch pileeffectively decreases the settlement and cost of construction of pile because of unique load sharing mechanism Full scale field load test was carried out on squeezed branch pile to determine the bearing capacity and interaction law between soil and pile.Load shared by branch

Summary

Introduction

Pile foundation is considered as one of the widely used foundation technique when it comes to soft soil, which has huge problem of low bearing capacity, excessive and differential settlement. The squeezed branch pile is developed from conventional circular pile, it has one or more enlarged part (branch) along the pile shaft.Based on conventional intellection, many new techniques of pile foundation have been developed by changing cross section of conventional pile, providing multi-section to pile for more efficient foundation at lower cost. The squeezed branch pile is construction modification ofpile in which cavities for branches is formed by tightly squeezing of surrounding soil laterally without digging the soil. Squeezed branch pileeffectively decreases the settlement and cost of construction of pile because of unique load sharing mechanism Full scale field load test was carried out on squeezed branch pile to determine the bearing capacity and interaction law between soil and pile.Load shared by branch.

Methods

Results

Conclusion