Literature Review of Micropiles and its Class...

Literature Review of Micropiles and its Classifications

Author Name : Vikas Kumar, Abhishek Arya

ABSTRACT: Micro piles have been used effectively in many applications of ground improvement to increase the bearing capacity and reduce the settlements particularly in strengthening the existing foundations . Advantages of Micro piles are high carrying capacity less site constraint problem and self sustained operation. This piling system is therefore attractive to both the client and foundation designer. Apart from this the light and compact drilling rigs other ancillary equipment ,like grout mixer and grout pumps is very compact size. Micro installations can penetrate to hundreds of feet in depth; each of the piles can support many tons of loads . Micro piles transfer load through liquefiable soil to competent bearing strata to confirm to the design requirements .This paper deals with a case study in which micro piles of 100 mm diameter and 4m long have been used to improve the bearing capacity of foundation soil and in the rehabilitation of the total building foundation system. The micro piles were inserted around the individual footings at inclination of 70° with the horizontal. This Micro pile technology is a reliable pile system that can withstand large capacity axial or lateral loads with minimal disturbance to the existing structures . They became very popular due to their ability to transfer loads efficiently through skin friction and due to their many installation advantages over a conventional pile system . Micro piles have the capability of combining micro pile technology with one or more of the other ground improvement techniques to meet unique or complex project requirements cost effectively and efficiently.