Selection of Analysis Method

Oct 13, 2025 by talynt.org 55 views

Analysis of the Carrying Capacity and Decrease in a Single Drill Pole of 0.80 m Diameter Using the Model of Soft Soil and Mohr-Coulomb in the Sapadia Medan Hotel Project

Introduction

The foundation is a crucial component of a building, playing a vital role in supporting the burden of the structure and ensuring the stability of the building. The resistance and strength of the foundation depend on the ability of the soil below to receive a load, which is known as the carrying capacity of the foundation. Determining the carrying capacity and estimating the foundation decrease is essential to ensure the safety and durability of the building.

Importance of Foundation Analysis

The foundation is the base of a building, and its strength and stability directly affect the overall structure. A weak or unstable foundation can lead to catastrophic consequences, including building collapse. Therefore, it is essential to conduct thorough analysis and testing to determine the carrying capacity and estimate the foundation decrease.

Methods of Foundation Analysis

Several methods are used to determine the carrying capacity and estimate the foundation decrease, including:

Static Load Test (Loading Test): This method involves applying a load to the foundation to measure its resistance and strength.
Empirical Methods: These methods use mathematical formulas and empirical data to estimate the carrying capacity and foundation decrease.
Element Methods: These methods use numerical analysis to model the behavior of the foundation and estimate its carrying capacity and foundation decrease.
Allpile Program: This program uses a combination of empirical and element methods to estimate the carrying capacity and foundation decrease.

Soil Investigation and Laboratory Tests

Soil investigation and laboratory tests are essential to determine the properties of the soil and estimate the carrying capacity and foundation decrease. The data obtained from these tests are used to input into the analysis models to estimate the carrying capacity and foundation decrease.

Analysis of Carrying Capacity and Decrease

This study analyzes the carrying capacity and decrease of a single drill pole with a diameter of 0.80 m using the empirical method, element method, and allpile program. The results are compared with the interpretation of the static load test conducted at the Sapadia Medan Hotel project.

Results of Carrying Capacity Analysis

The results of the analysis of the carrying capacity of the ultimate foundation of the pile showed a significant variation of values depending on the method used.

Empirical Method: The empirical method using N-SPT data produces the highest ultimate carrying capacity value, which is 541.12 tons (using the Reese and Wright method). Meanwhile, the lowest value is obtained using soil parameters from laboratory test results, which is 464.52 tons.
Allpile Program: The Allpile Program produces an ultimate carrying capacity of 484.48 tons.
Static Load Test: The interpretation of the static load test with a 500-ton (2-time plan load) shows the largest ultimate carrying capacity using the Mazurkiewicz (540 ton) method and the smallest uses the Chin method (478.41 tons).
Other Methods: The Broms method produces lateral carrying capacity of 23.28 tons, while the element method to produce a value of 82.36 tons.

Declining Analysis Results

Decrease analysis also shows variations of results depending on the method used.

Static Load Test: Measured decrease from the static load test of 8.538 mm.
Element Method to: The element method to produce the smallest decrease value, which is 6.313 mm.
Allpile Program: The Allpile Program produces a decrease in 7.67 mm.
Empirical Method: Empirical method produces a decrease in 8.25 mm and 8.89 mm.
Pole Group: The decrease that occurred in the pole group was 7.91 mm.
ASTM Standard d.1143-81: Permitted decreased based on ASTM standards D.1143-81 is 25.40 mm.

Conclusion

Analysis of the carrying capacity and decrease in the foundation of the drilling pole at the Sapadia Medan Hotel project shows that the selection of the right analysis method is very important to get accurate results. Empirical methods, methods of elements to, and allpile programs provide different results, so it is necessary to do careful consideration to choose methods that are in accordance with field conditions and project needs.

Keep in mind that the results of this analysis are estimates and need to be validated with more complete field data. In addition, safety factors also need to be considered in designing the foundation to ensure the resilience and durability of the building.

Recommendations

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

Selection of Analysis Method: The selection of the analysis method should be based on the field conditions and project needs.
Validation of Results: The results of this analysis should be validated with more complete field data.
Safety Factors: Safety factors should be considered in designing the foundation to ensure the resilience and durability of the building.

By following these recommendations, the accuracy and reliability of the analysis can be improved, and the safety and durability of the building can be ensured.
Frequently Asked Questions (FAQs) About the Analysis of the Carrying Capacity and Decrease in a Single Drill Pole of 0.80 m Diameter Using the Model of Soft Soil and Mohr-Coulomb in the Sapadia Medan Hotel Project

Q: What is the importance of foundation analysis in building construction?

A: Foundation analysis is crucial in building construction as it determines the carrying capacity and estimate of the foundation decrease, which directly affects the safety and durability of the building.

Q: What are the methods used to determine the carrying capacity and estimate the foundation decrease?

A: Several methods are used, including static load test (loading test), empirical methods, element methods, and allpile program.

Q: What is the role of soil investigation and laboratory tests in determining the carrying capacity and estimate of the foundation decrease?

A: Soil investigation and laboratory tests provide essential data to input into the analysis models to estimate the carrying capacity and foundation decrease.

Q: What are the results of the carrying capacity analysis using the empirical method, element method, and allpile program?

A: The results show a significant variation of values depending on the method used. The empirical method using N-SPT data produces the highest ultimate carrying capacity value, while the element method to produces the smallest decrease value.

Q: What is the permitted decreased based on ASTM standards D.1143-81?

A: The permitted decreased based on ASTM standards D.1143-81 is 25.40 mm.

Q: What are the recommendations for selecting the analysis method and validating the results?

A: The selection of the analysis method should be based on the field conditions and project needs, and the results should be validated with more complete field data.

Q: What are the safety factors that should be considered in designing the foundation?

A: Safety factors should be considered in designing the foundation to ensure the resilience and durability of the building.

Q: What are the limitations of the analysis?

A: The results of this analysis are estimates and need to be validated with more complete field data.

Q: What are the future directions for this research?

A: Future research should focus on validating the results with more complete field data and considering safety factors in designing the foundation.

Q: What are the practical applications of this research?

A: The practical applications of this research include improving the accuracy and reliability of foundation analysis, ensuring the safety and durability of buildings, and reducing the risk of foundation failure.

Q: What are the implications of this research for the construction industry?

A: The implications of this research for the construction industry include the need for more accurate and reliable foundation analysis, consideration of safety factors in designing the foundation, and the use of advanced analysis methods to improve the safety and durability of buildings.

Q: What are the potential benefits of this research?

A: The potential benefits of this research include improved building safety, reduced risk of foundation failure, and increased confidence in the accuracy and reliability of foundation analysis.

Q: What are the potential challenges of this research?

A: The potential challenges of this research include the need for more complete field data, consideration of safety factors in designing the foundation, and the use of advanced analysis methods to improve the accuracy and reliability of foundation analysis.

Q: What are the potential future directions for this research?

A: The potential future directions for this research include the development of new analysis methods, the use of advanced materials and technologies, and the consideration of new safety factors in designing the foundation.