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K. Kershaw, R. Luna (2018)
Scale model investigation of the effect of vertical load on the lateral response of micropiles in sandDFI Journal - The Journal of the Deep Foundations Institute, 12
B. Sharma (2015)
A Model Study of Micropiles subjected to Lateral Loading and Oblique Pull
(1989)
Pierry RF (1989) Behaviour of minigrouted piles used in foundation underpinning in Beaumont Clay, Houston, Texas, USA
B Broms (1964)
Lateral resistance of piles in cohesionless soilJ Soil Mech Found Div ASCE, 90
(1983)
The “Reticolo di Pali Radice” (Reticulated Root pile) for the improvement of soil resistance physical aspects and design approaches
B. Sharma, P. Buragohain (2014)
Behaviour of Micropile Groups under Oblique Pull Out Loads in SandIndian Geotechnical Journal, 44
DA Bruce (1995)
Ground control and improvement
B Broms (1964)
123J Soil Mech Found Div ASCE, 90
B. Broms (1964)
LATERAL RESISTANCE OF PILE IN COHESIONLESS SOILSJournal of the Soil Mechanics and Foundations Division, 90
(1988)
Foundation on drilled and grouted minipiles—a case history
DA Bruce (1995)
406
(1984)
Improvement of the bearing capacity of soil by insertion of Group and Reticulated micropiles
F. Schlosser, I. Juran (1981)
Design parameters for artificially improved soils
(1995)
Small-diameter cast-in-place elements for load-bearing and in situ earth reinforcement
I. Shahrour, I. Juran (2004)
Seismic behaviour of micropile systemsGround Improvement, 8
(2014)
Non linear behaviour of small diameter bored piles under horizontal loads
Micropiles are suitable for underpinning and seismic retrofitting of structures. It is specially suitable for low head room area and can easily access congested areas where it is difficult to construct conventional piles. Its two basic functions are structural support and soil reinforcement. Literature review showed contradictory group effects on micropile behaviour subjected to vertical and lateral loading. This study is to investigate the response of micropile groups subjected to lateral load installed in loose sand (relative density 30%), in medium dense sand (relative density 50%) and in dense sand (relative density 80%). The group behaviour is found to be a function of the state of the sand, spacing of the micropile groups and length-to-diameter (L/D) ratio. Ultimate lateral resistances of micropile groups are maximum at 2D spacing in loose sand and in medium dense sand. In dense sand, maximum lateral resistance is observed in 6D spacing. Overall, it was observed that groups with higher L/D ratio had positive group effects. Modes of failure of the micropile groups are found to be a function of the length-to-diameter ratio and relative density of the sand.
Innovative Infrastructure Solutions – Springer Journals
Published: Mar 22, 2019
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