Time-Cost-Quality Trade-off Model for Optimal Pile Type Selection Using Discrete Particle Swarm Optimization Algorithm

Abstract

The cost of pile foundations is part of the super structure cost, and it became necessary to reduce this cost by studying the pile types then decision-making in the selection of the optimal pile type in terms of cost and time of production and quality .So The main objective of this study is to solve the time–cost–quality trade-off (TCQT) problem by finding an optimal pile type with the target of "minimizing" cost and time while "maximizing" quality. There are many types In the world of piles but in this paper, the researcher proposed five pile types, one of them is not a traditional, and developed a model for the problem and then employed particle swarm optimization (PSO) algorithm, as one of evolutionary algorithms with the help of (Mat lab software), as a tool for decision making problem about choosing the best alternative of the traded piles, and proposes a multi objective optimization model, which aims to optimize the time, cost and quality of the pile types, and assist in selecting the most appropriate pile types. The researcher selected 10 of senior engineers to conduct interviews with them. And prepared some questions for interviews and open questionnaire. The individuals are selected from private and state sectors each one have 10 years or more experience in pile foundations work. From personal interviews and field survey the research has shown that most of the experts, engineers are not fully aware of new soft wear techniques to helps them in choosing alternatives, despite their belief in the usefulness of using modern technology and software. The Problem is multi objective optimization problem, so after running the PSO algorithm it is usual to have more than one optimal solution, for five proposed pile types, finally the researcher evaluated and discussed the output results and found out that pre-high tension spun (PHC)pile type was the optimal pile type.

Mechanical Properties of Corroded-Damaged Reinforced Concrete Pile-supporting Wharves

“…A maximum of 5% reduction of the cross-section of the steel reinforcement was categorized in a moderate to high corrosion state of the reinforcement bar; a reduction of 2% steel reinforcement area is in the low to moderate state of corrosion, and 0.50% reduction of steel rebars is in the passive condition of corrosion state. Moderate to high state of corrosion has a maximum increment value of cross-sectional reduction of 9.215 mm 2 , a low to moderate state has a maximum increment cross-sectional reduction of 5.62 mm 2 , and a passive corrosion state has a maximum increment cross-sectional reduction of 2.467mm 2 .…”

“…The selection of the right pile type for foundations is one of the primary concerns to evaluating its performance in terms of time, cost and quality. Further, improving the design efficiency and changing the traditional methods of pile production are some practical solutions for the reduction of cost in the construction of a superstructure that is about 5% to 20% of the overall project construction cost [2]. However, the degradation of material properties is one factor that causes the risk of failure [1].…”

Implementation of Integrated Life Cycle Design Principles in Ground Improvement and Piling Methods—A Review

“…The literature reviewed also include several studies that consider time-cost analysis, such as risk analyses including time, cost, and quality throughout the project life cycle [93] as well as a model incorporating time, cost, and quality aspects [94]. Mata, Silva, and Pinho, in [95], proposed a risk-management methodology based on the probability of specific events occurring, and their economic consequences were proposed, which are applicable to drilled shafts.…”

Variable-Length Multiobjective Social Class Optimization for Trust-Aware Data Gathering in Wireless Sensor Networks

“…Additionally, by virtually mapping a node’s trust value, the optimum mobility route with high trust was built for mobile data collection. Furthermore, a portable edge data collector was used to access and gather reliable data from sensors with quantifiable degrees of trust [ 19 ]. The potential for sliding into local minima when the total amount of virtual forces reaches zero is a limitation of this approach.…”

“…However, SC-MOPSO was developed based on blind mobility operators that do not consider the specific nature of the data-gathering application [ 18 ]. Additionally, it has not been extended to be used for multiobjective data gathering with trust-awareness applications using mobile sinks [ 19 ].…”