Geotech Report · OPW26/0094

Project No. PG-10899                                                                                                 Page | 10
November 2023
Ref: PG-10899, 2023-10-16, GR VER 1
DD Sunnyside CD Sunnyside Pty Ltd – Geotechnical Investigation - Proposed Residence, 30 Mossman Court, Noosa Heads




13.0 CONSTRUCTON MONITORING

Construction vibrations could potentially cause settlement in the loose upper level
sands, thereby damaging nearby structures founded in these strata. Prior to
commencement of construction on site, it is recommended that a detailed
dilapidation survey be undertaken to establish the condition of all existing adjacent
structures.

    13.1 Monitoring

It is recommended that monitoring points should be established on the retention
system to check for deflections during excavation. A suggested spacing of the
monitoring points would be 10m along the walls. A regular monitoring program of
these stations should be implemented.

Monitoring must commence before any excavation to establish baseline readings.

    13.2 Preconstruction Survey

Prior to commencement of construction on site, it is recommended that a
dilapidation survey be undertaken on the adjacent structures.

This survey should include the following:

     •     The extent of exiting damage (if any)
     •     The general condition of the property, ie. Condition of all exposed columns
           and beams, partition walls and cladding etc.
     •     Road, kerb and channel and footpath condition adjacent development site.

14.0 SITE MANAGEMENT

To maintain the long term performance of the structure, good management of the
soil conditions and the development is vital throughout the life of the development.

The following are some specific comments with respect to site management:

     •     The ground surface around the perimeter of the buildings should slope away
           from the structure and fall to the stormwater system. Water should not be
           allowed to pond adjacent to the buildings.
     •     Founding soils should not be allowed to become saturated.
     •     Service trenches under the buildings should be kept to a minimum. Saturation
           of the on-site material will result in an increase in settlement potential.
     •     Footings should be poured immediately after compaction. If footings cannot
           be poured on the same day as compaction, a blinding layer of at least
           50mm thickness is recommended.