Trail Hole Case Study - Feasibility study / trial holing using Conroys Group suction excavator
This case study shows an example of the “cradle to grave” process already carried out on numerous projects for various clients by the Conroys group. The conroys group can carry out as little or as much of the following process depending on the client’s requirements.
The feasibility study was carried out on an area called Moxley within Wolverhampton, Staffordshire for Enterprise working on behalf of Severn Trent water.
Precise
Trial holes were identified and pre sited to identify engineering difficulties and ensure fluidity with the ultimate aim to identify service density and hence water main renewal techniques for a scheme totaling 14km.
Feasibility process
- Extent of works is identified and an overall plan developed with technique proposals identified by the client (i.e. new main size requirement).
- Supervisor visits site and plots locations of trial holes in order to optimise information and ensure engineering difficulties are identified and mitigated before commencement of works.
- Program is compiled (see example pdf) and issued to client with commencement dates and identified engineering difficulties to ensure accurate noticing to local councils and transparency of works.
- Works commence with on average ten to fifteen trial holes being completed per day (Depending on ground conditions/engineering difficulties) with full chapter 8 and traffic management utilised as required.
- Once excavated services are colour sprayed to highlight their existence, photographed (See Photo 1 & Photo 2) and dimensions measured and recorded on a detailed trial hole log (see example report) and issued to the client or the Conroys group design team for interpretation.
- Once images and information are captured trial holes are backfilled and reinstated (Often 90% of excavations are completed within three hours of excavating) and closing dimensions forwarded to the client for noticing purposes.
Information is collated and a design technique proposal issued to the client for their perusal (see map pdf).
