Geotechnical

  • Geotechnical services

Geotechnical Consultants

Our comprehensive range of geotechnical services deliver a clear understanding of ground conditions and geotechnical risk.

Delta-Simons understands that the biggest risk to any development, both technically and commercially, is often in the ground. Our comprehensive range of geotechnical services deliver a clear understanding of ground conditions and geotechnical risk. These can be seamlessly combined with the often complex contamination and waste management issues to provide a comprehensive picture of brownfield in-ground risk.

Services we offer

Geotechnical Logging and Sampling

Geotechnical work is carried out in accordance with the customer's specifications and typically includes sampling and testing in accordance with the current guidance in BS5930, or a bespoke method to suit specific circumstances. The Delta-Drilling team has adopted field quality procedures for corrected SPTs, and taking relevant undisturbed samples using U100 aluminium liners or thin walled samplers (UT100).

Desk Studies, Site Reconnaissance

We can undertake an initial assessment to understand the geological history and the engineering implications for developing a site; then, following best practice and guidance from BS5930 & BS10175, we can provide a clear standard format report to the developer for initial risk planning.

In-situ Testing, Sampling, Laboratory Testing

We can provide the customer with a quality controlled and assured part of a ground investigation in accordance with BS5930, BS1377, BS EN 22475-1, BS EN 22476-2, BS EN 22476-3, EN 1997-2.

Mine Workings, Ground Stability Investigation

The geotechnical implications of a development on potentially unstable former mineral workings, natural slopes or geo-hazards can be part of the planning process and guidance is issued in PPG23 Building on Unstable Land.  This requires a geotechnical risk assessment to demonstrate that the land is not unsuitable for construction.

Project Management and Validation

In a valid Materials Management Plan, soils for reuse must be suitable for use in engineering terms as well as chemical. We can identify the most cost effective and appropriate remediation technologies, depending on the geology of the ground. We are also able to supervise and manage remediation contractors, and undertake an independent validation of the remediation.

Infiltration (soakage) Testing Digest BRE365 Method

The encouragement for sustainable drainage from regulators in the planning process (Environment Agency publication Groundwater Protection Policy and Practice GP3) and ever more sparse resources has meant that engineers need to rely on field testing undertaken strictly in accordance with the empirical methodology. We will only deviate from the BRE365 procedure if specifically instructed by the engineer. We have a system that has a very high standard of health and safety protection and minimises impact on the site, we do not promote extrapolation of field curves, we endeavour to have long term groundwater monitoring as a part of the investigation, and we start testing early in the working week where possible to allow for three consecutive fills. All these precautions are intended to ensure the planning process is not held up by indefensible field reports on infiltration rates.

Coal Mining Risk Assessment (CMRA)

A CMRA is a standard format report that must be submitted with a planning application in certain areas across the UK where coal mining is suspected. We can perform a desk top study and risk assessment to identify how coal mining issues may influence the development, and recommend any necessary mitigation measures that need to be taken.