In addition to basement construction, L&D Contracting have also excavated and built forty (40) basements in Brisbane which have been fully designed, built and certified in a bespoke manner with us typically providing geotechnical engineer, structural engineer, piling contractor and anchor & shotcrete contractor.
Firstly, we require our Client to provide us with details of all live loads and dead loads for the new building which will be imposed upon the basement retention; and, settle all regulatory and authority fees, and provide all building approvals, operational works approval and cross-boundary approvals if and where required.
We will then undertake any geotechnical investigation that is required to fully obtain sufficient information on the ground and groundwater conditions together with the strength and deformation properties of the soils to be retained and the soils which will support the earth retaining structure.
Next, evaluation of the foundations of adjacent properties and their tolerances are undertaken to estimate the magnitude and distribution of ground movements due to the proposed excavation and the potential damage to the building due to ground movements that may occur if not identified.
Then follows the selection of type of retaining wall (e.g. sheet pile wall, soldier pile wall with infill, contiguous bored pile wall, secant pile wall, diaphragm wall, sprayed structural wall) also the type of support system to be utilised (e.g. cantilevered or unbraced wall, strutted or braced wall, tied-back or anchored wall).
Based upon all the information collected the retaining wall is then fully designed and working drawings issue; signed and fully certified by Registered Professional Engineer (RPEQ) complete with Forms 15, and issued to our client for obtaining operational works approval. On completion of the works, L&D Contracting will then provide our client with a Form 16 and full As-Constructed survey plan.
