Slope Stabilisation & Soil Nailing: Submission Workflows for Temporary Hillside Excavations
Key Takeaways A defensible hillside excavation submission connects the ground model, temporary works design, authority requirements, and construction controls from the beginning. Define the temporary and permanent works interfaces before design responsibility becomes unclear. Investigate soil, rock, groundwater, drainage, adjacent assets, and existing utilities proportionately to risk. Verify soil nailing against local and global failure […]
Common Reasons BCA Rejects Temporary ERSS Submissions (And How to Avoid Them)
Key Takeaways Temporary ERSS submissions are commonly returned when the technical evidence, drawings, design assumptions, and authority responses do not form one clear and verifiable package. Confirm that every required form, report, calculation, drawing, and supporting record is included. Base the ERSS design on current site investigation, groundwater, utility, and neighbouring-structure information. Show the design […]
The Cost of ERSS Submissions in Singapore: Breakdown of Consultant Fees, Checking Fees, and Testing
Key Takeaways ERSS costs depend on the excavation, ground conditions, design responsibility, checking requirements, and the level of construction-stage support needed. A useful budget separates professional fees from testing, monitoring, authority coordination, and risk allowances. ERSS is a temporary earth-retaining system used to support excavations and control ground movement. Consultant fees rise with excavation depth, […]
Encroachment & Boundary Constraints: Permanent Tie-Back Anchors vs. Strutting Systems
Key Takeaways Deep excavations beside property boundaries require the retaining system, construction sequence, approvals, and monitoring plan to be considered together. Permanent tie-back anchors can preserve internal working space but may require rights beyond the site boundary. Strutting keeps support within the site, reducing dependence on neighboring land and easement approvals. Soil, groundwater, excavation depth, […]
Eurocode 7 (SS EN 1997) for Singapore ERSS: Ultimate Limit State (ULS) vs. Serviceability Limit State (SLS)
Key Takeaways Eurocode 7 provides the limit-state framework for Singapore ERSS, but a compliant design also depends on local ground conditions, construction stages, and movement control. ULS checks resistance against collapse, instability, hydraulic failure, and structural failure. SLS checks movements, settlement, deformation, and effects on neighbouring assets. Groundwater and soil variability must be reflected in […]
Sheet Piles vs. Contiguous Bored Piles (CBP) vs. Secant Piles: Choosing the Right Temporary Wall Type
Key Takeaways Temporary excavation walls should be selected from the interaction of soil, groundwater, depth, neighboring assets, access, and construction sequence—not from wall type alone. Sheet piles can suit fast, reversible works where driving disturbance and water control are manageable. Contiguous bored piles provide reinforced concrete support but leave drainage gaps between piles. Secant piles […]
Designing ERSS for Kallang Formation: Navigating Marine Clay in Singapore Basements
Key Takeaways Deep excavation in Kallang Formation demands a ground model that accounts for soft marine clay, variable fill, groundwater, and time-dependent movement. ERSS design is strongest when geotechnical and structural decisions remain coordinated from investigation through construction. Build the geological and groundwater model before selecting the ERSS. Treat excavation staging, support installation, and monitoring […]
Temporary King Post and Strutting Systems: Structural Detailing for BCA Approval
Key Takeaways A temporary king post and strutting system is only as reliable as its design basis, connections, construction sequence, and site control. BCA approval depends on a coordinated package that explains both the engineering and how the system will be built. Define the ground, loading, geometry, and construction stages before detailing steel. Check member […]
Temporary Ground Anchors vs. Strutting Systems: Selection Criteria and BCA Approval Constraints
Key Takeaways Temporary excavation support should be selected from the ground model, movement limits, land rights, and construction sequence—not from price alone. The Technical Directors, C&S Consultants, Estimators must align the engineering, approval, and commercial decisions early. Anchors preserve internal excavation space but require suitable ground and legal rights beyond the site boundary. Strutting keeps […]
PLAXIS 2D/3D Best Practices for BCA ERSS Design Reports
Key Takeaways A dependable BCA ERSS report is built on traceable assumptions, realistic staging, and clear interpretation of ground–structure interaction. Establish the design basis, project constraints, and submission responsibilities before modeling. Convert investigation data into a layered ground model with documented uncertainty. Select two-dimensional or three-dimensional analysis according to geometry, loading, and interaction effects. Simulate […]