Deterministic Modelling of Hydraulic Static Pile Driver Productivity for Rectangular and Triangular Shaped Piles in Silty Soil

Abstract

Various piles driving equipment can be used for piling in building projects. In densely populated urban area, more environmentally friendly pile driving equipment, such as hydraulic static pile driver (HSPD) is therefore needed. There are important factors influence the HSPD productivity that are implied in treatment of pile in soil, such as soil type, driven pile size, piling depth, and cycle time. While some methods are available to estimate construction productivity, each method has limitations, such as unreliable prediction and difficult implementation. In present research, HSPD productivity in construction project has been estimated by deterministic modelling, so produced the chart model of HSPD productivity of rectangular and triangular shaped piles in silty soil. Data were collected through site observation from five building projects in three cities of Indonesia, i.e. Semarang, Pati, and Solo. A deterministic model has been designed utilizing data of 180 piling points from the five projects and simulation, so was obtained the chart model of HSPD productivity. Validation of the outputs of the model shows a valid result with an average validity value of 95.6% and standard deviation of 3.3%. Sensitivity analysis of these outputs shows an average sensitivity value of 88.25%. The productivity chart is valuable to plan and to estimate time related to the use of HSPD in construction projects.