Calculation The Edge Of Slab Deflection Of Modified Cakar /1e4m System By Applying The Displacement Factor From Puri’s Graph

Puri, Anas and Ardiansyah, Rony (2017) Calculation The Edge Of Slab Deflection Of Modified Cakar /1e4m System By Applying The Displacement Factor From Puri’s Graph. In: 15th International Conference on QIR (Quality in Research), 24-27 Juli 2017, Universitas Indonesia.

Text P8-QiR2017-Calculation the Edge.pdf - Submitted Version Download (22MB)

Abstract

Simple method in Nailed-slab pavement ssystem analysis was proposed by previous researcher. This method uses equivalent modulus of subgrade reaction (k). This modulus consists of the modulus of sub grade reaction from plate load test (k) and additional modulus of sub grade reaction due to pile installing (Kk). The additional modulus of sub grade reaction has been also proposed by some authors. Displacement factor was used in determining the additional modulus of sub grade reaction. The curve of this factor was proposed by Puri (2017) for soft clay, and the curve of the invers one was proposed by Hardiyatmo (2011) for stiff clay. This paper will disscuss the application of the curve of displacement factor from Puri’graph (2017) to calculate the deflectios of Modified Cakar Ayam (MCA) pavement system. Calculated deflections based on this curve were compared to the observed deflection. The deflection was calculated by using Beam on Elastic Foundation method. Full scale test result from MCA pavement system was used. The concentric and edge loading points were considered. The calculated deflection based on single-row shell of MCA pavement system was compared to the observed deflection from three-row shell. Results show that the calculated deflection in good agreement with the observation, althought it was very over-estimated about 390% to 665%. In this case, Overestimated was caused by ignoring the end bearing resistance of shell in determining the additional modulus of subgrade reaction Kk. It could be also because of neglecting the lean concrete, shell connector, and vertical wall barrier. The Puri’s graph can be used to determind Kk for MCA analysis, but in further research it should be considered the end bearing resistance of shell.

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