A thorough understanding of subsurface conditions is a critical first step in any construction project, particularly in Bali, where land characteristics can vary significantly even within the same area. Indo Soil recently completed a geotechnical investigation for the Berawa Signature development located on Raya Semat, Gang Jalak Bali, in Tibubeneng Village, North Kuta, Badung Regency.
This investigation, conducted on October 17–18, 2024, was designed to evaluate the soil profile and determine its bearing capacity to support the structural loads of the planned building.
Project Overview
The project site is situated along the Semat Highway, a rapidly growing corridor in the Canggu–Berawa area. As developments increase in scale and complexity, the need for detailed soil testing becomes more essential. For this project, Indo Soil conducted a series of borehole tests accompanied by Standard Penetration Testing (SPT) to evaluate both shallow and deeper soil layers.
Methodology
The investigation involved:
- Borehole drilling to a depth of 20 meters
- Standard Penetration Testing (SPT) at set intervals
- Visual classification of soil samples
- Evaluation of groundwater levels
- Analysis of soil bearing capacity for foundation planning
This methodology was selected based on the scope of the project and the structural requirements provided by the client.
Findings
Soil Profile
The borehole log revealed a layered soil structure. The upper layers consisted of soft to medium gray clay, followed by compacted material and young sedimentary rock (cadas). A dense hard rock layer was encountered at approximately 3 meters, which provides a reliable bearing stratum for deeper foundation systems.
Groundwater
Groundwater was observed at approximately 8 meters below the surface. While this depth is below the planned foundation level, it remains an important factor for waterproofing and long-term maintenance planning.
Bearing Capacity Analysis
Shallow Foundation
At a depth of 1 meter, the estimated net bearing capacity for a shallow foundation was calculated to be approximately 0.48 kg/cm². While this may be sufficient for lightweight or single-story structures, it may not provide adequate support for buildings with higher load requirements.
Deep Foundation (Bore Pile)
A 30 cm diameter bore pile extending to a depth of 3 meters was evaluated based on SPT data. The estimated ultimate bearing capacity was approximately 56.20 tons. This figure indicates that the soil conditions are favorable for the use of bore piles as a safe and cost-effective foundation method for the planned building.
Recommendations
Given the project scope and site conditions, Indo Soil recommends the use of 30 cm diameter bore piles at a depth of 3 meters. This approach offers a high level of structural stability and minimizes the risk of differential settlement. Should the project involve cut-and-fill work before construction, adjustments to the foundation depth should be made accordingly.
It is essential that the final foundation design be coordinated with the structural engineering team, using the data and recommendations provided in the full geotechnical report.
Conclusion
The results of this soil investigation provide a solid foundation for safe and informed structural design. The consistency of the subsurface conditions, along with the favorable bearing capacity at 3 meters, supports the feasibility of a bore pile foundation system for the Berawa Signature project.
By conducting proper soil testing early in the development process, project stakeholders can avoid costly construction errors, reduce delays, and ensure full compliance with local permitting requirements, including SLF and PBG.
Contact Indo Soil
Indo Soil provides certified soil testing and topographic survey services across Bali, Lombok, NTB, and NTT. We work with developers, architects, contractors, and individual landowners to deliver timely and accurate geotechnical reports tailored to project needs.
To request a consultation or sample report, please contact:
Email: admin@soiltestbali.com
WhatsApp: +62 851 3514 2186
Website: www.soiltestbali.com
