Difference between revisions of "Sub-surface components"

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==Stone choker layer==
 
==Stone choker layer==
In LID facilities, a choker layer of ≥ 100 mm depth is recommended to prevent migration of finer filter media into the underlying storage reservoir aggregate. Similar to the storage reservoir material, this aggregate layer should be a washed 5 – 10 mm stone free from fines and debris.  Installation of aggregate choker layer should not be done when frozen.  
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In LID facilities, a [[choker layer]] of ≥ 100 mm depth is recommended to prevent migration of finer filter media into the underlying storage reservoir aggregate. Similar to the storage reservoir material, this aggregate layer should be a washed 5 – 10 mm stone free from fines and debris.  Installation of aggregate choker layer should not be done when frozen.  
  
 
Follow the construction guidance shown above in the section [[Sub-surface components#Storage reservoir|Storage reservoir]]
 
Follow the construction guidance shown above in the section [[Sub-surface components#Storage reservoir|Storage reservoir]]

Revision as of 16:29, 17 October 2022

The construction guidance in this section applies to all sub-surface and ground-level LID practices: bioretention gardens, bioswales, rain gardens, exfiltration trenches, enhanced swales, permeable pavements, infiltration trenches, infiltration chambers, and soakaways. In general, this section describes construction and inspection processes for below ground installed materials and infrastructure that are part of the LID practices noted above.

Overview[edit]

This section gives guidance for project managers, engineers, and contractors on the installation of sub-surface components of LID practices.

Geotextiles[edit]

Geotextiles: Installation

Underdrains[edit]

Underdrains: Installation

Impermeable liners[edit]

Impermeable liners: Installation

Overflows[edit]

Overflow: Installation

Monitoring wells[edit]

Monitoring wells: Installation

Storage reservoir[edit]

Construction: storage reservoir

Permeable pavement sub-base and base course[edit]

Permeable pavement sub-base and base course

Trench, Chamber, and Perforated Pipe Installation[edit]

Trench, chamber, and perforated pipe: Installation

Stone choker layer[edit]

In LID facilities, a choker layer of ≥ 100 mm depth is recommended to prevent migration of finer filter media into the underlying storage reservoir aggregate. Similar to the storage reservoir material, this aggregate layer should be a washed 5 – 10 mm stone free from fines and debris. Installation of aggregate choker layer should not be done when frozen.

Follow the construction guidance shown above in the section Storage reservoir

For more guidance on materials specifications, refer to Aggregates, OPSS aggregates and (Ontario Provincial Standards, 2013) [1]

Curbing[edit]

Construction: curbing

Pretreatment and inlet[edit]

Construction: pretreatment and inlet

References[edit]

  1. Ontario Provincial Standards. 2013. OPSS.PROV.10101 Aggregates - Base, Subbase Select Subgrade, and Backfill Material. https://www.roadauthority.com/Standards/?id=a28fdfaf-3bf8-4679-81ca-4e44b2263cf8