Bored and Driven Piles

Bored and Driven Piles

Introduction

Piers have been used to restore and/or stabilize homes and commercial structures that have settled. The true purpose of the Atlas Resistance Piers interest sold and installed only the contractors preparing the atlas, and is authorized to recommend and provide appropriate solutions for a wide range of soils.

Discussion

Pile design in foundation engineering practice includes predicting the static response of a pile to an applied load. However, only rarely is the profession able to compare the predictions with measurements of the actual response of the pile to the loading. Academia seldom makes predictions, but concentrates on theoretical evaluation of known results with some verification in laboratory model scale. As Kay (2003) pointed out, the greatest advancement of the state of the art is achieved when comparing prediction of response with actual measured performance, provided the predictions are class A, which is a forecast of an event yet to take place. 

It is very satisfying for a practitioner to be able to verify a design by monitoring a full-scale response of a foundation. With regard to full-scale field tests, there is usually never time—neither in terms of hours to spend for the effort nor in terms of years to wait for the response to develop. The static loading test on a single pile being an exception and an event that allows for both to be considered. On occasions, there has been interesting and worthwhile pile foundation engineering “pile prediction seminars”.

Bored and Driven Piles

Bored piles are used when a soil replacement rather than a soil displacement method of piling is required and also when there is a need to minimise vibration

They are unsuitable where the groundwater level on the side to maintain the high. The best application for cohesive soils (Chen and Kulhawy, 2003).

Sometimes referred to as drilled piers, bored piles are cast in situ piles of 600 to 6000 mm in diameter with a depth that may reach up to 100 meters. Bored piles are installed, first remove the soil in the process of drilling, then the construction of pile by placing concrete into the hole. In the simplest form of construction consists of drilling on unlined or unprotected openings, and filling of concrete. Complications that can occur in places such as the difficult conditions and the availability of groundwater has led to the development of special techniques used in drilling. Selecting the right technology drilling must be done in such a way as to minimize interference from the surrounding soil. For cohesionless soils (sands, gravels, silts), whether under water or not, the pile should be well supported with steel casing or stabilizing dirt, such as suspension of bentonite.

The advantage of the bored piles is that only one pile to be bored at the same time. Therefore, when working close to the foundation, only a short duration of the foundation need to be subjected to any risk at this time. In addition, it is easier to overcome the obstacles of the land than to match the wall or diaphragm. Also bored piles can penetrate moderately hard foundation materials easier ...