Helensville Primary - Blk 14, Site: Drainage Remediation

Details

Tender Closed
RFx ID :	27852496
Tender Name :	Helensville Primary - Blk 14, Site: Drainage Remediation
Reference # :	1306-23-08
Open Date :	Friday, 11 August 2023 9:00 AM (Pacific/Auckland UTC+12:00)
Close Date  :	Friday, 1 September 2023 5:00 PM (Pacific/Auckland UTC+12:00)
Department/Business Unit :	Board of Trustees - Approve by BoT - ie. School Principal
Tender Type :	Registration of Interest (ROI)
Tender Coverage :	Sole Agency  [?]
Categories :	72000000 - Building and Facility Construction and Maintenance Services
Regions:	Auckland
Required Pre-qualifications :	None
Contact :	All submissions to be made through the GETS website.
Alternate Physical Delivery Address  :	All submissions to be made through the GETS website.
Alternate Physical Fax Number  :	All submissions to be made through the GETS website.
Agency Address :	NEW ZEALAND

Field Drainage
CCTV investigation and hydrojetting has been carried out to map out the school’s entire
stormwater and waste water network. Further work is required to address the drainage issue
the school is experiencing on the playing field.
Engage with a drainlayer to scope the works required.
Excavate and install lateral drains
Include gravel bands
Dispose of soil
Expose, remove and install modern approved subsoil drainage systems to replace the older
style subsoil drain
Install Vertidrain
Seed playing fields with grass seed.
Apply fertiliser

Kowhai Block
CCTV investigation and hydrojetting has been carried out to map out the school’s entire
stormwater and waste water network. Further work is required to address the drainage issue
the school is experiencing around Kowhai Block.
As per CCTV investigation, the stormwater drain suffers from a broken pipe and major cracks
within, causing blockages (cesspit 23 towards trackline 4)
- Cut and remove the hard surface.
- Excavate down to locate marks.
- Cut and remove the affected sections by approximately 8-meters.
- Replace the removed section with a new PVC pipe.
- Backfill.
- Reinstate with plain concrete / hot mix asphalt.
- Upon completion, we will remove spoil.
Cesspit 15 towards 25 :
- Establishment.
- Hydro jetting the pipe clean.
- Cut and remove hard surfaces.
- Excavating down to defective earthenware joint displacement, cracks and root ingress.
- Expose and remove the defective earthenware root intrusion section.
Install x1 150mm 13-meters of CIPP Liners to seal the cracks, root intrusion and joint
displacement section
- Backfill with Hardfill and compact.
- Reinstatement of hard surface as required.
- Upon completion, remove spoil.
- Post-construction CCTV.
- Disestablishment

This tender has been completed.

Date RFx was completed/updated: Saturday, 16 September 2023 7:39 PM (Pacific/Auckland UTC+12:00)