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Tenfell
Closed tender
Published 27 Mar 2020

South Road Retaining Wall, Weston-super-Mare. Ground Investigation Works

North Somerset Council · South West

Key facts

Estimated value
£40,000
Closing date
01 May 2020
Contract starts
17 May 2020
Contract ends
03 Jul 2020
Procedure
Open procedure
Buyer type
Local government

Description

The Proposed Ground Investigation works contract comprises the following works: • 5 No. boreholes advanced using a drilling rig capable of both dynamic sampling and rotary coring that can obtain the required samples through possibly made ground/fill, superficial deposits and solid geology to a depth of 7 mbgl. Collection UT100 undisturbed samples where possible/appropriate, SPT testing and collection of rock cores. Boreholes shall be a minimum of 1.5m back from the retaining wall. • 5 no. hand dug observation pits of the retaining wall foundations. • 3 no. horizontal diamond core holes through the retaining wall to confirm wall thickness and the nature of the materials directly behind the wall. • Soils to be logged in accordance with BS EN ISO 14688-1:2002+A1:2013 and BS 5930:2015. • Rock to be logged in accordance with BS EN ISO 14689-1:2002, BS 5930:2015. • Geotechnical laboratory testing on selected samples. • Environmental testing on selected samples. • Provision of AGS data. • Ground Investigation Factual Report (as per 16.8.1) Specific borehole requirements are detailed further in Schedule 1 and Schedule 2 of Ground Investigation (GI) Specification. The proposed borehole location plan is attached to the GI.

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