Bearing Capacity Improvement Using Micropiles: A Case Study

Micropiles 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. Frictional resistance between the surface of the pile and soil and the associated group/network effects of micropiles are considered as the possible mechanism for improvement. This paper deals with a case study in which micropiles of 100 mm diameter and 4 m long have been used to improve the bearing capacity of foundation soil and in the rehabilitation of the total building foundation system. The micropiles were inserted around the individual footings at inclination of 70 0 with the horizontal. The actual design for retrofitting was based on the assumption that the vertical component of the frictional force between the soil and the micropile resists the additional load coming from the structure over and above the bearing capacity. The technique was successful and the structure did not show any signs of distress later. Detailed finite element analysis conducted validated the suggested treatment. The paper describes the case study, the method of treatment adopted in the field and the results of numerical analysis.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784407134
• Supplemental Notes:
  • Full conference proceedings are available on CD-ROM.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Babu, G.L. Sivakumar
  • Murthy, B Srinivasa
  • Murthy, D.S. N
  • Nataraj, M S
• Conference:
  • GeoSupport 2004: Innovation and Cooperation in the Geo-Industry
  • Location: Orlando Florida, United States
  • Date: 2004-1-29 to 2004-1-31
• Publication Date: 2004

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 692-699
• Monograph Title: GeoSupport 2004. Drilled Shafts, Micropiling, Deep Mixing, Remedial Methods, and Specialty Foundation Systems

Subject/Index Terms

• TRT Terms: Bearing capacity; Bearing piles; Case studies; Finite element method; Foundations; Friction; Ground settlement; Piles (Supports); Retrofitting; Settlement (Structures); Soil stabilization; Structures
• Uncontrolled Terms: Micropiles
• Subject Areas: Bridges and other structures; Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01000233
• Record Type: Publication
• ISBN: 0784407134
• Files: TRIS
• Created Date: May 10 2005 7:11AM