Experimental Study on Piles with Pile Cap at Varying Position under Different Loading Conditions
M. Sugunadevi1, S. P. Jeyapriya2
1M. Sugunadevi, Assistant Professor, Department of Civil Engineering, Sri Krishna College of Engineering and Technology, Coimbatore (Tamil Nadu), India.
2S. P. Jeyapriya, Assistant Professor, Department of Civil Engineering, Government College of Technology, Coimbatore (Tamil Nadu), India.
Manuscript received on 18 December 2018 | Revised Manuscript received on 27 December 2018 | Manuscript published on 30 December 2018 | PP: 79-83 | Volume-8 Issue-2, December 2018 | Retrieval Number: B5561128218/18©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: High rise buildings and offshore structures are usually constructed over foundation which comprises of several number of piles connected together using pile cap. These piles and pile caps frequently are subjected to a mixture of lateral, vertical as well as twisting forces. Conventional method tends to emphasis predominantly on foundation resistance under vertical loading. The piles are essential subjected to horizontal loads along with vertical loads. Resistance to the vertical and the lateral loading is generally provided by base and side friction, pile-soil-pile cap interaction between pile and surrounding soil, position of the pile cap, number of piles and piles arrangement with respect to the loading direction. In this study, the piles are placed in the sand with pile cap i) above the soil surface at a height of 35mm ii) pile cap bottom resting on surface of soil medium iii) pile cap top placed at the surface of soil and iv) pile cap placed below soil surface to a depth of about 35mm. Experimental analysis were carried out for all the above cases under vertical, lateral and combined loading conditions. Parameters like position of the pile cap, quantity of piles and their arrangements were varied and analysed. The test results reveal that the pile cap placed below the soil surface increases lateral resistance capacity of the piles in the range of 56% to 66% compared with pile cap placed above the soil surface under both independent and combined loading conditions in cohesionless soil.
Keywords: Cohesion less Soil, Lateral Resistance Capacity, Pile Foundations, Pile cap, Pile – Soil – Pile Cap Interaction
Scope of the Article: Soil-Structure Interaction