Geotechnical Engineering
Effective January 2025
Every deep foundation and ground improvement project we execute is backed by measurable outcomes that directly impact your structure’s safety, schedule, and long-term performance. Below are the specific value commitments we deliver on every engagement.
All bored piling and diaphragm wall designs are analyzed against the latest national seismic code for high-risk zones. We provide a signed load-bearing verification report that confirms a minimum safety factor of 2.5 against ultimate bearing capacity, giving your structural engineer a clear compliance path.
Our compaction grouting programs target a minimum 300% increase in cone penetration test tip resistance in loose sands. This eliminates liquefaction risk under existing crane rails, pier decks, and building footings without removing or replacing the soil.
We construct diaphragm walls to a minimum depth of 30 meters in marine and high-water-table conditions. Each panel is tested for continuity and groundwater cutoff before backfill, with a contractual maximum leakage rate of 0.5 liters per minute per 10 square meters.
We commit to a fixed timeline for bored piling and diaphragm wall installation, backed by daily progress reporting and a dedicated project manager on site. Delays caused by equipment failure or crew availability are covered by our contingency fleet.
Every project delivers a full data package including borehole logs, pile integrity test results, static load test graphs, and a final geotechnical report. This package is formatted to meet the submission requirements of national infrastructure authorities and your structural engineer.
Every bored pile and diaphragm wall we install is backed by verified load data and seismic compliance reports. We don't just meet code — we provide the documentation that proves it.
Every pile group undergoes bi-directional static load testing to 2.5 times the design load. Results are stamped by a licensed geotechnical engineer and submitted with every project closeout package.
Our reports include site-specific response spectra, liquefaction hazard maps, and soil-structure interaction analyses. They are accepted by national infrastructure regulators without revision.
We have completed bored piling and diaphragm wall installations on reclaimed land and active berths. Our marine team works within tidal windows and maintains continuous groundwater cutoff.
Over 800 cubic meters of low-slump grout injected under existing crane rails at the Port of Rotterdam. Post-treatment CPT tip resistance increased by 300%, eliminating liquefaction risk.
All load-bearing verification data, material certifications, and as-built records are organized per national infrastructure code requirements. Clients receive a digital and printed dossier within 30 days of completion.
Feedback from structural engineers and project owners on deep foundation and ground improvement work.
Clear answers about deep foundation engineering, ground improvement, and seismic compliance for high-rise and marine projects.
We routinely install bored piles from 20 to 55 meters depth, depending on soil stratigraphy and structural load requirements. For high-rise towers on reclaimed land, depths of 45 meters below sea level are common, with diameters up to 1.5 meters.
Diaphragm walls are constructed using hydromill or grab techniques to depths of 30 meters or more. We install reinforced concrete panels with waterstop joints and perform post-construction permeability tests to verify cutoff performance against the design groundwater head.
Compaction grouting is preferred for loose sands and silty soils where liquefaction mitigation is critical under existing structures. It displaces and densifies the soil matrix without significant vibration, making it suitable for port berths, crane rails, and industrial slabs where access is limited.
Yes. Each report includes dynamic soil-structure interaction analysis, load-bearing verification of existing pile groups, and specific retrofit recommendations where needed. Our reports have been accepted by regulatory authorities without revision for transit hubs and high-rise projects in seismic zones.
We conduct static load tests to 200% of design load and dynamic load tests using PDA (Pile Driving Analyzer) for production piles. All results are compared against design safety factors, typically 2.5 against ultimate bearing capacity, and documented in a load-bearing verification report.
Timeline depends on scale and site conditions. A 48-storey tower foundation with bored piles and diaphragm walls typically spans 14 to 18 weeks from mobilization to load testing. Compaction grouting for an industrial pier berth can be completed within 10 weeks for up to 800 cubic meters of grout injection.