Tuesday, September 17, 2013
The Vendor will remove any trees, roots, stumps or other obstructions which interfere with the construction of the drainage works. Excavated areaes for drainage conduits will be excavated carefully to the required grade as indicated on the drawings with due allowance made for the minimum depth of bedding dirt required. Excavated area widths will be a minimum of twice the conduit external diameter (pipe) or width (culvert).
Where soft clay or silt or other unsuitable material occurs at the completed trench excavation grade, such material shall be removed and replaced with suitable trench base material. When such unsuitable material is discovered, the Contractor shall inform the Superintendent, who shall determine the extent of the removal of such material and the type of material to be used as replacement. Removal and replacement of the unsuitable material shall be at a rate to be agreed.
Loose material at the bottom of the trench excavation as a result of over excavation shall be removed if so directed by the Superintendent and replaced with approved bedding material at the Contractor's cost. Trench excavation for any drainage conduit shall not be commenced until sufficient resources (including plant, equipment, pipes, culverts, bedding material, back fill material) are on site to ensure that construction of the particular drainage conduit may be completed in a swift orderly operation.
The Vendor will, at his own expense, do all things necessary to keep the excavated areas free from water during the construction of the drainage conduit. This will include preventing flood water, run-off water or other extraneous water from entering the excavated area; the installation, if necessary, of a dewatering system to prevent the ingress of groundwater; and the provision of all pumping requirements to ensure that any water entering the excavated area is immediately removed. The Vendor will comply with all Construction Safety Act Regulations relating to safety of the drainage works by ensuring that barricades are installed around excavations, ramps are available within excavated areas, excavations are shored where necessary, and otherwise complying with all other requirements of the regulations.
The Supplier shall, at his own cost, do all things necessary to keep the trenches free from water during the construction of the drainage pipe. This shall include preventing flood water, run-off water or other extraneous water from entering the trench; the installation, if necessary, of a dewatering system to prevent the ingress of groundwater; and the provision of all pumping requirements to ensure that any water entering the trench is immediately removed.
Where soft clay or silt or other unsuitable material occurs at the completed trench excavation grade, such material shall be removed and replaced with suitable trench base material. When such unsuitable material is discovered, the Contractor shall inform the Superintendent, who shall determine the extent of the removal of such material and the type of material to be used as replacement. Removal and replacement of the unsuitable material shall be at a rate to be agreed.
Loose material at the bottom of the trench excavation as a result of over excavation shall be removed if so directed by the Superintendent and replaced with approved bedding material at the Contractor's cost. Trench excavation for any drainage conduit shall not be commenced until sufficient resources (including plant, equipment, pipes, culverts, bedding material, back fill material) are on site to ensure that construction of the particular drainage conduit may be completed in a swift orderly operation.
The Vendor will, at his own expense, do all things necessary to keep the excavated areas free from water during the construction of the drainage conduit. This will include preventing flood water, run-off water or other extraneous water from entering the excavated area; the installation, if necessary, of a dewatering system to prevent the ingress of groundwater; and the provision of all pumping requirements to ensure that any water entering the excavated area is immediately removed. The Vendor will comply with all Construction Safety Act Regulations relating to safety of the drainage works by ensuring that barricades are installed around excavations, ramps are available within excavated areas, excavations are shored where necessary, and otherwise complying with all other requirements of the regulations.
The Supplier shall, at his own cost, do all things necessary to keep the trenches free from water during the construction of the drainage pipe. This shall include preventing flood water, run-off water or other extraneous water from entering the trench; the installation, if necessary, of a dewatering system to prevent the ingress of groundwater; and the provision of all pumping requirements to ensure that any water entering the trench is immediately removed.
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