Ground-stabilisation work

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 framework will be split into three lots as listed below and tenderers may price for all lots or the lot(s) of their choice. • Lot 1 – Drilling and grouting with unobstructed open access equipment; • Lot 2 – Drilling with restricted height/restricted access equipment; • Lot 3 – Drilling and solution grouting with restricted height/restricted access equipment. Successful tenderers will enter into a 4-year framework in accordance with the NEC4 Framework Contract and the NEC4 Engineering and Construction Short Contract and additional Z clauses. The Authority seeks to utilise both suspension and solution grouts for the stabilisation of collapsing ground, for improving stability of mine entries and for the infilling of historic mine workings. Drilling and grouting will be undertaken within open areas where access is unobstructed for the equipment. Safe working platforms for equipment and labour, designed to span potential collapse zones, will need to be provided as works require. The Authority seeks to utilise restricted height/restricted access equipment to perform investigative drilling. This may include drilling inside of buildings or within similarly enclosed structures with restrictions as outlined within the tender documents. Safe working platforms for equipment and labour, designed to span potential collapse zones, will need to be provided as works require. The Authority seeks to utilise restricted height/restricted access equipment to perform drilling and solution grouting for the stabilisation of collapsing ground, for improving stability of mine entries and for the infilling of historic mine workings. This may include drilling inside of buildings or within similarly enclosed structures with restrictions as outlined within the tender documents. Safe working platforms for equipment and labour, designed to span potential collapse zones, will need to be provided as works require.