Ground-stabilisation work

Tender description

The Coal Authority is looking for specialist contractors to undertake ground and mine entry stabilisation work by drilling and grouting techniques within the coalfields of Great Britain. The works specification for drilling work will be the relevant schedules within the UK Specification for ground investigation, second edition including additions and amendments. The Coal Authority shall be entering into a multi provider Framework Agreement awarding a contract of up to 3 suppliers per region to ensure sufficient resources and to minimise the risk of non-performance and taking into account the most economically advantageous option. The framework will be split into 5 lots and tenderers may price for the relevant lots of their choice. The framework will be for the period 1.8.2019 to 31.7.2023. The works specification for grouting work will be the Authority’s specific specification for the works in hand, and this work will comply with BS EN 12715:2000 Execution of special geotechnical work – Grouting, and take account of BRE 509 Second edition Stabilising mine workings with PFA grouts – Environmental Code of Practice. The Authority seeks to utilise both suspension and solution grouts in the stabilisation of collapsing ground, mine entries and the infilling of historic coal mine workings. Work can be on land and within properties with open unobstructed access and restricted access requiring specialist plant and equipment to undertake such work. Safe working platforms for plant and labour, designed to span potential collapse zones, will need to be provided as works require. Works under this framework will be specified by the Authority and its consultants for projects resulting from and associated with: — ground collapses or movements attributable to recorded and/or unrecorded coal mining, — stabilisation of settling mine shaft infill materials, — construction of minewater treatment schemes over shallow coal mine workings, — investigation of ground collapses or movements internally and/or externally to buildings with restricted access to assist in the determination of their cause. The works specification for grouting work will be the Authority’s specific specification for the works in hand, and this work will comply with BS EN 12715:2000 Execution of special geotechnical work – Grouting, and take account of BRE 509 Second edition Stabilising mine workings with PFA grouts – Environmental Code of Practice. The Authority seeks to utilise both suspension and solution grouts in the stabilisation of collapsing ground, mine entries and the infilling of historic coal mine workings. Work can be on land and within properties with open unobstructed access and restricted access requiring specialist plant and equipment to undertake such work. Safe working platforms for plant and labour, designed to span potential collapse zones, will need to be provided as works require. Works under this framework will be specified by the Authority and its consultants for projects resulting from and associated with: — ground collapses or movements attributable to recorded and/or unrecorded coal mining, — stabilisation of settling mine shaft infill materials, — construction of minewater treatment schemes over shallow coal mine workings, — investigation of ground collapses or movements internally and/or externally to buildings with restricted access to assist in the determination of their cause. The works specification for grouting work will be the Authority’s specific specification for the works in hand, and this work will comply with BS EN 12715:2000 Execution of special geotechnical work – Grouting, and take account of BRE 509 Second edition Stabilising mine workings with PFA grouts – Environmental Code of Practice. The Authority seeks to utilise both suspension and solution grouts in the stabilisation of collapsing ground, mine entries and the infilling of historic coal mine workings. Work can be on land and within properties with open unobstructed access and restricted access requiring specialist plant and equipment to undertake such work. Safe working platforms for plant and labour, designed to span potential collapse zones, will need to be provided as works require. Works under this framework will be specified by the Authority and its consultants for projects resulting from and associated with: — ground collapses or movements attributable to recorded and/or unrecorded coal mining, — stabilisation of settling mine shaft infill materials, — construction of minewater treatment schemes over shallow coal mine workings, — investigation of ground collapses or movements internally and/or externally to buildings with restricted access to assist in the determination of their cause. The works specification for grouting work will be the Authority’s specific specification for the works in hand, and this work will comply with BS EN 12715:2000 Execution of special geotechnical work – Grouting, and take account of BRE 509 Second edition Stabilising mine workings with PFA grouts – Environmental Code of Practice. The Authority seeks to utilise both suspension and solution grouts in the stabilisation of collapsing ground, mine entries and the infilling of historic coal mine workings. Work can be on land and within properties with open unobstructed access and restricted access requiring specialist plant and equipment to undertake such work. Safe working platforms for plant and labour, designed to span potential collapse zones, will need to be provided as works require. Works under this framework will be specified by the Authority and its consultants for projects resulting from and associated with: — ground collapses or movements attributable to recorded and/or unrecorded coal mining, — stabilisation of settling mine shaft infill materials, — construction of minewater treatment schemes over shallow coal mine workings, — investigation of ground collapses or movements internally and/or externally to buildings with restricted access to assist in the determination of their cause. The works specification for grouting work will be the Authority’s specific specification for the works in hand, and this work will comply with BS EN 12715:2000 Execution of special geotechnical work – Grouting, and take account of BRE 509 Second edition Stabilising mine workings with PFA grouts – Environmental Code of Practice. The Authority seeks to utilise both suspension and solution grouts in the stabilisation of collapsing ground, mine entries and the infilling of historic coal mine workings. Work can be on land and within properties with open unobstructed access and restricted access requiring specialist plant and equipment to undertake such work. Safe working platforms for plant and labour, designed to span potential collapse zones, will need to be provided as works require. Works under this framework will be specified by the Authority and its consultants for projects resulting from and associated with: — ground collapses or movements attributable to recorded and/or unrecorded coal mining, — stabilisation of settling mine shaft infill materials, — construction of minewater treatment schemes over shallow coal mine workings, — investigation of ground collapses or movements internally and / or externally to buildings with restricted access to assist in the determination of their cause.