Importance of Foundation Analysis in Bridge Construction

Oct 13, 2025 by wbrum.org 19 views

Comparison of Bored Pile Foundation Carrying Capacity Analysis in Sta 43+030 at Point B Using the Element Method to and Analytical Methods (Case Study of the Sei Wampu Bridge Development Project)

Introduction

The foundation is a crucial component of a building structure, serving as a medium to transfer loads from the structure above it to the ground. Foundations can be broadly categorized into two types: shallow foundations and deep foundations. The selection of the foundation type is heavily dependent on the load-bearing capacity and the condition of the land at the project site. For light loads and good soil conditions, shallow foundations are typically used, whereas for heavy loads, deep foundations are the preferred choice.

Importance of Foundation Analysis in Bridge Construction

In the Sei Wampu Bridge construction project in Stabat, the analysis of the carrying capacity of the axial foundation of the drill pile was carried out using Standard Penetration Test (SPT) data. The methods employed in this calculation include the Reese & Wright method, testing pile driving analyzer (PDA), and analysis using the element method (meh). Additionally, the analysis of lateral carrying capacity was conducted using the Brooms method, which incorporates calculations for decreased elastic piles, pole efficiency, and carrying capacity of pole groups.

Comparison of Carrying Capacity Analysis Results

The results of the calculation of the carrying capacity of the ultimate pole carried out at the Bore Hole I point, with a depth of 30.5 meters, showed a value of 593,468 tons based on SPT data. These results are consistent with the calculation using the Reese & Wright method, which also produced 593,468 tons. However, the analysis using PDA yielded a lower value, at 553.07 tons. On the other hand, the calculation using the element method showed a value of 593,112 tons.

Lateral Ultimate Carrying Capacity Analysis

The lateral ultimate carrying capacity obtained through the Brooms method showed results of 43,0251 tons analytically and 46.715 tons graphically. Furthermore, the single elastic decline produced was recorded at 1,0012 mm, while based on the poulus and davis methods, the decrease reached 16.84 mm. The decrease calculated by the element method was 2.15 mm.

Variations in Carrying Capacity and Decrease

From this analysis, it appears that there are variations in the carrying capacity and decrease resulting from various methods used. This variation can be attributed to several factors, including differences in the type of soil, depth under study, the method of implementing testing, safety factors applied, and differences in the parameters used in each calculation.

Importance of Choosing the Right Method

In-depth analysis of these results highlights the significance of selecting the right method in the calculation of the carrying capacity of the foundation. Differences in yields can have major implications for the design and safety of the structure, especially on large projects such as bridge construction. Therefore, a strong understanding of the condition of the soil and the right calculation method is necessary to achieve optimal results in the foundation design.

Accuracy of Results in Construction

The accuracy of the results of this calculation becomes very important in the world of construction. This is because the decision taken based on this analysis will affect the overall performance of the structure in the future. Therefore, a comprehensive study and comparison of various methods of analysis of the carrying capacity of the foundation is highly recommended to ensure the safety and efficiency of the structure that is built.

Conclusion

In conclusion, the analysis of the carrying capacity of the bored pile foundation in Sta 43+030 at point B using the element method to and analytical methods has shown variations in the carrying capacity and decrease resulting from various methods used. This highlights the importance of choosing the right method in the calculation of the carrying capacity of the foundation. A strong understanding of the condition of the soil and the right calculation method is necessary to achieve optimal results in the foundation design. Therefore, a comprehensive study and comparison of various methods of analysis of the carrying capacity of the foundation is highly recommended to ensure the safety and efficiency of the structure that is built.

Recommendations

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

Selection of the Right Method: The selection of the right method in the calculation of the carrying capacity of the foundation is crucial. A strong understanding of the condition of the soil and the right calculation method is necessary to achieve optimal results in the foundation design.
Comprehensive Study: A comprehensive study and comparison of various methods of analysis of the carrying capacity of the foundation is highly recommended to ensure the safety and efficiency of the structure that is built.
Accuracy of Results: The accuracy of the results of this calculation becomes very important in the world of construction. This is because the decision taken based on this analysis will affect the overall performance of the structure in the future.
Safety and Efficiency: The safety and efficiency of the structure that is built are highly dependent on the accuracy of the results of this calculation. Therefore, a comprehensive study and comparison of various methods of analysis of the carrying capacity of the foundation is highly recommended.
Frequently Asked Questions (FAQs) on Bored Pile Foundation Carrying Capacity Analysis

Q1: What is a bored pile foundation?

A1: A bored pile foundation is a type of deep foundation that is constructed by drilling a hole in the ground and then filling it with concrete. It is a popular choice for building structures that require a strong and stable foundation.

Q2: What is the purpose of carrying capacity analysis in bored pile foundation?

A2: The purpose of carrying capacity analysis in bored pile foundation is to determine the maximum load that the foundation can withstand without failing. This is crucial in ensuring the safety and stability of the structure.

Q3: What are the different methods used in carrying capacity analysis of bored pile foundation?

A3: The different methods used in carrying capacity analysis of bored pile foundation include:

Reese & Wright method: This method uses the Standard Penetration Test (SPT) data to calculate the carrying capacity of the bored pile foundation.
Testing Pile Driving Analyzer (PDA) method: This method uses the PDA data to calculate the carrying capacity of the bored pile foundation.
Element method: This method uses the finite element analysis to calculate the carrying capacity of the bored pile foundation.
Brooms method: This method uses the Brooms formula to calculate the carrying capacity of the bored pile foundation.

Q4: What are the factors that affect the carrying capacity of bored pile foundation?

A4: The factors that affect the carrying capacity of bored pile foundation include:

Type of soil: The type of soil at the project site can affect the carrying capacity of the bored pile foundation.
Depth of the pile: The depth of the pile can affect the carrying capacity of the bored pile foundation.
Method of implementing testing: The method of implementing testing can affect the carrying capacity of the bored pile foundation.
Safety factors applied: The safety factors applied can affect the carrying capacity of the bored pile foundation.
Differences in parameters used: The differences in parameters used in each calculation can affect the carrying capacity of the bored pile foundation.

Q5: Why is it important to choose the right method in carrying capacity analysis of bored pile foundation?

A5: It is important to choose the right method in carrying capacity analysis of bored pile foundation because the results of the analysis can have a significant impact on the design and safety of the structure. A wrong method can lead to inaccurate results, which can result in structural failure or other safety issues.

Q6: What are the benefits of using the element method in carrying capacity analysis of bored pile foundation?

A6: The benefits of using the element method in carrying capacity analysis of bored pile foundation include:

Accurate results: The element method provides accurate results, which can help in ensuring the safety and stability of the structure.
Flexibility: The element method can be used to analyze complex structures and soil conditions.
Cost-effective: The element method can be cost-effective compared to other methods.

Q7: What are the limitations of using the Brooms method in carrying capacity analysis of bored pile foundation?

A7: The limitations of using the Brooms method in carrying capacity analysis of bored pile foundation include:

Simplistic approach: The Brooms method uses a simplistic approach, which may not be accurate for complex structures and soil conditions.
Limited applicability: The Brooms method may not be applicable to all types of soil and structures.
Inaccurate results: The Brooms method may provide inaccurate results, which can result in structural failure or other safety issues.

Q8: How can the accuracy of results be ensured in carrying capacity analysis of bored pile foundation?

A8: The accuracy of results can be ensured in carrying capacity analysis of bored pile foundation by:

Using the right method: Using the right method for the specific project and soil conditions.
Providing accurate input data: Providing accurate input data, such as soil properties and pile dimensions.
Verifying results: Verifying results through multiple methods and checks.
Consulting experts: Consulting experts in the field of geotechnical engineering and structural analysis.