Methods Used in the Analysis

Oct 13, 2025 by wbrum.org 40 views

Introduction

The development of transportation infrastructure, particularly in the railroad sector, is a crucial aspect of modernization and economic growth. The Directorate General of Railways is currently implementing the Elevated Track (Elevated Track) construction project that connects the Medan Besar Station to the Bandar Khalipah Station with a total length of 8 km. This project involves the construction of bored pile foundations, which are chosen for their ease of mobilization and cost-effectiveness. However, the analysis of carrying capacity and elastic decline in bored pile foundations is a complex task that requires careful consideration of various factors.

Background

The analysis of carrying capacity and elastic decline in bored pile foundations is a critical aspect of geotechnical engineering. The carrying capacity of a bored pile foundation refers to its ability to withstand axial loads, while the elastic decline refers to the settlement of the foundation due to lateral loads. The analysis of these parameters is essential to ensure the safety and efficiency of infrastructure projects.

Methods Used in the Analysis

In this study, three methods were used to analyze the carrying capacity and elastic decline of the bored pile foundation: the Reese and Wright method, the element method (FEM), and the Allpile program. The Reese and Wright method is a widely used method for analyzing the carrying capacity of bored pile foundations, while the element method (FEM) is a numerical method that uses finite elements to analyze the behavior of the foundation. The Allpile program is a software program that uses a combination of analytical and numerical methods to analyze the carrying capacity and elastic decline of bored pile foundations.

Results of the Analysis

The results of the analysis show that the carrying capacity of the bored pile foundation at the Bore Hole 2 point is 1576,056 tons at a depth of 29,800 m, using the Allpile program. This result is consistent with the calculations carried out using the Reese & Wright method, which produces a carrying capacity of 1575.005 tons at a depth of 30,450 m. The PDA testing (Pile Driving Analyzer) also shows the carrying capacity of ultimit at 810.0 tons at a depth of 30,100 m, which is in harmony with the calculation using the element method up to, which reached 845,267 tons at a depth of 29,800 m.

Lateral Carrying Capacity Analysis and Elastic Decline

The lateral carrying capacity for Bore Hole 2, based on the Broms method, shows analytical results of 154,424 tons and graphics results of 127,714 tons. From the elastic decline analysis, a single decrease value was 24.186 mm, while the element method to produce a decrease of 3,610 mm.

Factors Causing Differences in Results

There are several factors that contribute to the differences in results between various methods used in the analysis. These factors include:

Types of Soil: Different soil characteristics in the Bore Hole location can affect the carrying capacity obtained. The testing must be adjusted to specific soil conditions.
Depth: At different depths, the nature and behavior of the soil will also change. This can produce varying analysis results.
Testing Method: Various test methods have different procedures and tools, which of course have an impact on the accuracy of the results.
Calculation Parameters: Each method uses parameters that may not be uniform, which can contribute to varied results.

Conclusion

The analysis of carrying capacity and elastic decline in bored pile foundations is a complex task that requires careful consideration of various factors. The results of this study show that although there is a slight difference between the results of various methods, each approach offers an important insight into the performance of the foundation. Understanding this difference is very crucial in the planning and implementation of efficient and safe infrastructure projects. Further research and field testing can provide a better understanding of the behavior of the bored pile foundation in specific geotechnical conditions.

Recommendations

Based on the results of this study, the following recommendations are made:

Further Research: Further research is needed to better understand the behavior of bored pile foundations in specific geotechnical conditions.
Field Testing: Field testing is essential to validate the results of the analysis and to provide a better understanding of the behavior of the bored pile foundation.
Development of New Methods: New methods and techniques should be developed to improve the accuracy and efficiency of the analysis of carrying capacity and elastic decline in bored pile foundations.

Limitations of the Study

This study has several limitations, including:

Limited Data: The data used in this study is limited, and further research is needed to provide a more comprehensive understanding of the behavior of bored pile foundations.
Simplifications: The analysis used in this study is based on simplifications and assumptions, which may not accurately reflect the behavior of the bored pile foundation in real-world conditions.
Lack of Validation: The results of this study have not been validated through field testing, which is essential to ensure the accuracy and reliability of the analysis.

Future Directions

The analysis of carrying capacity and elastic decline in bored pile foundations is a complex task that requires careful consideration of various factors. Future research should focus on developing new methods and techniques to improve the accuracy and efficiency of the analysis. Additionally, field testing is essential to validate the results of the analysis and to provide a better understanding of the behavior of the bored pile foundation in specific geotechnical conditions.

Q: What is carrying capacity in the context of bored pile foundations?

A: Carrying capacity refers to the ability of a bored pile foundation to withstand axial loads, such as the weight of a building or a bridge. It is a critical parameter in geotechnical engineering that determines the safety and efficiency of infrastructure projects.

Q: What is elastic decline in bored pile foundations?

A: Elastic decline refers to the settlement of a bored pile foundation due to lateral loads, such as wind or seismic forces. It is an important parameter in geotechnical engineering that affects the stability and performance of infrastructure projects.

Q: What are the common methods used to analyze carrying capacity and elastic decline in bored pile foundations?

A: The common methods used to analyze carrying capacity and elastic decline in bored pile foundations include:

Reese and Wright method: A widely used method for analyzing the carrying capacity of bored pile foundations.
Element method (FEM): A numerical method that uses finite elements to analyze the behavior of the foundation.
Allpile program: A software program that uses a combination of analytical and numerical methods to analyze the carrying capacity and elastic decline of bored pile foundations.

Q: What are the factors that contribute to differences in results between various methods used in the analysis?

A: The factors that contribute to differences in results between various methods used in the analysis include:

Types of soil: Different soil characteristics in the Bore Hole location can affect the carrying capacity obtained.
Depth: At different depths, the nature and behavior of the soil will also change.
Testing method: Various test methods have different procedures and tools, which of course have an impact on the accuracy of the results.
Calculation parameters: Each method uses parameters that may not be uniform, which can contribute to varied results.

Q: What are the limitations of the study?

A: The study has several limitations, including:

Limited data: The data used in this study is limited, and further research is needed to provide a more comprehensive understanding of the behavior of bored pile foundations.
Simplifications: The analysis used in this study is based on simplifications and assumptions, which may not accurately reflect the behavior of the bored pile foundation in real-world conditions.
Lack of validation: The results of this study have not been validated through field testing, which is essential to ensure the accuracy and reliability of the analysis.

Q: What are the future directions for research in carrying capacity and elastic decline in bored pile foundations?

A: The future directions for research in carrying capacity and elastic decline in bored pile foundations include:

Development of new methods: New methods and techniques should be developed to improve the accuracy and efficiency of the analysis of carrying capacity and elastic decline in bored pile foundations.
Field testing: Field testing is essential to validate the results of the analysis and to provide a better understanding of the behavior of the bored pile foundation in specific geotechnical conditions.
Further research: Further research is needed to better understand the behavior of bored pile foundations in specific geotechnical conditions.

Q: What are the practical applications of the study?

A: The practical applications of the study include:

Design of infrastructure projects: The study provides a better understanding of the behavior of bored pile foundations, which can be used to design more efficient and safe infrastructure projects.
Risk assessment: The study can be used to assess the risks associated with bored pile foundations, which can help to mitigate potential problems.
Maintenance and repair: The study can be used to develop more effective maintenance and repair strategies for bored pile foundations.

Q: What are the implications of the study for the construction industry?

A: The implications of the study for the construction industry include:

Improved design: The study provides a better understanding of the behavior of bored pile foundations, which can be used to design more efficient and safe infrastructure projects.
Reduced costs: The study can be used to reduce the costs associated with infrastructure projects by minimizing the risk of problems and improving the efficiency of the design process.
Increased safety: The study can be used to improve the safety of infrastructure projects by reducing the risk of problems and improving the efficiency of the design process.