The Cost Comparison of High-Rise Foundation for Mixed Bored Piles and Micro Piles Proposal with Solely Bored Piles Proposal at Project Rumawip Residensi Gembira 737, Kuala Lumpur
Main article
Abstract
The paper aims to construct a framework on how value engineering of bored pile foundation design can improve the value for the high-rise building projects and studies the optimum design for bored pile foundation. One of the Rumah Mampu Milik Wilayah Persekutuan (RUMAWIP) residential high-rise projects known as Happy Residency 737 was used as a case study to compare the original and alternative foundation designs. As a result of this study, original piles foundation design of bored piles and micro piles were over designed which increased the construction cost significantly. Therefore, an alternative design of bored piles foundation was proposed to replace original bored piles and micro piles foundations. The strength capacity of bored piles was designed to the optimum while maintaining satisfactory performance. Next, the pile length was analyzed and designed to optimum level based on the soil investigation report. The alternative design of bored pile required 227 number of piles and original foundation design required 353 number of piles. Therefore, total 126 number of piles were reduced, consequently led to cost saving. Based on the Bill Quantities comparison between alternative and original foundation design, the total cost saving is RM 2,822,104.40. Pile Dynamic Load (PDA) Test and Static Load Test (SLT) are used to determine the performance of bored piles with Factor of Safety (FOS) of 2.0. In fact, 87.5% of PDA test results and 100% of SLT test results shown passed. In conclusion, value engineering of new bored pile design is technically sound, save cost and time.
