Surveying and Monitoring at Arcow Quarry
Central Alliance carried out a ground investigation in order to establish strata, ascertain geotechnical properties and install vibrating wire piezometers at Arcow quarry. Additional monitoring instrumentation including rod and plate settlement markers, permanent ground markers and structure targets were also installed on site in order to provide a comprehensive solution for observing settlement during the construction of a new earthwork embankment.
The embankment was required in order to construct three new railway sidings within the quarry providing an improved connection on to the Settle to Carlisle railway line. Following completion of the ground investigation and installation of monitoring points, Central Alliance undertook regular monitoring in order to provide real time information to the client, Story Contracting, allowing for construction works to be expedited.
“Accurate measurement of the ground water pressure was vital. The technique, provided for us by Central Alliance, involved drilling boreholes down to between four and seven metres below ground level. Vibrating wire piezometers were lowered into the holes to the level of the natural water table, where they were then encased in sand cells.” Chris Sidwell, Project Manager, Story Contracting