Blue Corridors in channel obstacle works - Box Culverts

Tender description

2.1 Objectives of the Contract The key objectives of the contract are to undertake easement works to the barriers, identified in Table 1.1, below. All easement works are scheduled to take place in 2022. Easements proposed to be constructed are summarised below: Easement Summary: Reference, Barrier Type, Easement Description: Rye 18 Vented Ford Replacement with triple barrel 10 m long 1.25 m wide x 0.75 m rise precast concrete rectangular box culvert Esk 5 Vented Ford Replacement with triple barrel 10 m long 1.25 m wide x 0.75 m rise precast concrete rectangular box culvert Esk 13 Vented Ford Replacement with triple barrel 8 m long 1.50 m wide x 1.00 m rise precast concrete rectangular box culvert The appointed Principal Contractor shall be responsible for carrying out all elements of the construction works subject to the approval of the Client / Project Manager. This Pre-Construction Information (PCI) document should be read in conjunction with the Contract Data including the Risk Register and design drawings for the project. Planning and drainage consent for the works is currently in progress. 2.2 Scope of Works The works are outlined below and detailed within the design drawings and shall be appointed under one contract per package of easement works. This document details the works required to be conducted at the easement. This PCI provides health and safety information as part of the Construction (Design and Management) Regulations 2015 (CD...d formation surface; Place box culvert sections into required locations (invert of central culvert section to be 100mm lower than that of the 2 other culvert sections); Apply jointing seals between culvert sections (as per box culvert supplier's recommendations); Re-grade watercourse bed to tie in to proposed culvert invert levels, reinstate bed with selected excavations or imported clean stone as directed on site; Place clean stone to bed and banks immediately downstream of culvert outfall and set stone in concrete bed for up to 2m downstream of culvert, as directed on site; Backfill and compact to sides of installed sides of culverts as required; Add dowel /bolt connection between box culvert and concrete slab above; Place 150-250mm deep A252 mesh reinforced C40 concrete on culvert sections (and tying into existing road surface); Add sealant waterproofing above the reinforced concrete layer; Cast in-situ concrete headwalls, with weepholes on downstream headwall, to tie-in to concrete box culvert sections; Add half battered double kerbs with transition kerbs at each end on upstream and downstream headwalls; Lay tarmac running surface (and tying into existing road surface); Attach 1.1m high handrail on upstream and downstream headwalls; Reinstate disturbed banks, tying into culvert headwall; and Place armour stone to watercourse at culvert outlet and reinstate upstream bed to lowered level. Full details are supplied in the additional documents