Engineering & Structural Surveys
Aspect Land & Hydrographic Surveys are specialists in acquiring high-resolution data sets, used for engineering & structural survey assessments purposes.
At the forefront of harnessing emerging technologies, we are keen to pioneer new and innovative approaches to both data capture and post-processing methodologies. We are the forerunners in combining both underwater and above water technologies and have been undertaking high resolution vessel-mounted mobile laser scanning combined with multibeam bathymetry since 2006.
During this time we have developed survey practices and procedures that produce the highest accuracies currently possible, and invested in equipment and software which is currently the best available.
Using Applanix INS systems and post-processing data to produce SBET files (Smoothed Best Estimated Trajectory), in conjunction with data acquired from one of our R2Sonic 2024 (0.5 degree beams) multibeam systems, we offer repeatable resolution and accuracies that clients have the highest level of confidence.
During concept and design phases it may be necessary to carry out bathymetric surveys, geophysical surveys and environmental assessments so that planning consents may be gained. Prior to construction it is common to require an understanding of the geology of the seabed sub-strata, with geotechnical investigation required to ground truth geophysical data.
This information can provide an overview of the sediment overburden and indicate the depth to which piles or caissons / cofferdams will require to be driven and likely conditions to be encountered. This is equally important for pipe or cable trenching projects, or where directional drilling is to be undertaken.
Once construction works have begun it is possible to monitor progress on an on-going basis, even inside a cofferdam or caisson where access can be difficult. Detailed 3D surveys may be carried out and displayed in software which can be manipulated and rotated by the client facilitating a fuller understanding of work progress and comparison to design drawings.
In mobile sediment areas, scouring or accretion can occur around bridge footings or pillars. It is essential that, in the design phase, the type of sediment, current and associated sediment transport regime is measured and understood in order that plans are made to ensure potential issues are allowed for.
Offering a range of services, including current monitoring over both long or short term periods, seabed geomorphological surveys utilising either multibeam or side-scan backscatter technology and ground truthing via grab sampling or vibrocores, a turn-key solution can be provided to the client.