Design and Construction of Micropiles

[shadabg]

Design and Construction of Micropiles

Author: IR. Liew Shah Shong & Fong Chew Chung | Size: 2 MB | Format: PDF | Quality: Original preprint | Publisher: Geotechnical Cource for Pile Foundation Design & Construction | Year: 2003 | pages: 49

Abstract :

This paper discusses the micropiles classification, design concept, problems associated with the common installation methods, construction control and performance of this piling system. Micropiiles can be designed as soil frictional piles and rock socketed piles either under tension or compression. Discussions will be addressed on the strain compatibility between the steel reinforcements and the grout under high carrying working load and the effects of grout in rock socketed micropile with permanent casings in the overburden soil. The strain compatibility problem of micropile, although important, is usually overlooked by many engineers. However, the inherent conservatism in the micropile design man obscure this compatibility problem. Construction control is another important aspect to warrant success of the micropiling system. Case histories on the construction problems, such as jointing of the reinforcements, disturbance to the subsurface materials induced by the different installation techniques and control of grouting operation, will be presented and discussed. Results of static pile load tests of micropiles are also presented. Generally, rock socketed micropiiles usually experience very small residual settlement as compared to other piling systems.

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[rami1976]

Design and Construction of Micropiles

Size: 2 MB | Format: PDF | Quality: Unspecified | Year: 2003

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