How do Subdrains work?

A subdrain system is an underground network of piping used to remove water from areas that collect or retain surface water or groundwater. Surface water can be collected into the subdrain system by installing a surface inlet or catch basin. Groundwater is collected by allowing water into the pipe through perforations.

What are the requirements of a good drainage system?

Also the pipes should be:

Durable;
Resistant to low and high temperatures;
Smooth inside – smooth inner surface allows to avoid frequent clogging;
Mechanically and chemically wear resistant;
Robust;
Compatible with outdoor drainage system.

What are the problems of drainage?

Common drainage problems include:

Smelly drains. Symptoms: Persistent unpleasant smells coming from either inside or outside your property.
Blocked drains.
Slow drains.
Collapsed drains.
Pests in drains.
Cracked drains.
Root intrusions.
Flooding.

What is drainage in construction?

Drainage is the artificial removal of water, both surface and sub-surface. Drainage is often a major element of civil engineering and construction projects and is necessary to avoid flooding and other damage. Typically, effluent is conveyed by drains to sewers, and from sewers to a suitable outfall or treatment plant.

What is Subdrain?

Subdrain – (4”, 6”, 8” (inch) perforated PVC pipe that is buried in the street right- of-way, drains water from soils during construction, usually installed deep beneath other utilities.

What is sub drainage?

Subsurface drainage is a pipe installed beneath the ground. surface to collect and/or convey excess water.

What pipes are used for drainage?

Polyvinyl Chloride pipes are the most commonly used pipes for any drainage project. Due to the material’s malleable properties, PVC pipes can come in almost any size. These types of pipes are great for drainage situations where the water and environment exert a great deal of pressure and weight.

What is a good drainage system?

Drainage systems, if properly installed, should keep water away from your roof and your foundation, minimizing soil erosion and foundation damage. Drainage systems are exposed to the elements, and should, therefore, be made of materials that can withstand such conditions. …

How do you manage drainage?

7 Ways to Maintain a Healthy Drainage System

Drain Guard. Use a drain guard on all your plug holes to reduce the amount of waste that gets washed down your sink.
Drain Cleaner.
Use Boiling Water Regularly.
Garbage Disposal.
Washing Pets.
Look for Signs of Trouble.
Let the Professional Do the Hard Work.

How do you control drainage?

Controlled drainage, also known as drainage water management, is the practice of using a water control structure to raise the depth of the drainage outlet, holding water in the field during periods when drainage is not needed.

How much filter material do you need for a subdrain?

In 1964 the Uniform Building Code began requiring 9 cubic feet of Class 2 filter material per lineal foot of subdrain, with at least 6 inches of bedding beneath the perforated collector pipe Subdrains can be laid out on keyway benches using any variety of techniques; such as lime or chalk to mark the desired trench line

How is a subdrain trench inspected after excavation?

After excavation, the subdrain trench should be inspected to see if intercepts the desired horizons and checked for longitudinal gradient using a hand level A 6 inch bed of free draining material is placed in the floor of the subdrain trench prior to laying the perforated collector pipe

What kind of pipe is a subdrain made of?

Subdrain shall be a perforated polyvinyl chloride pipe, polyethylene pipe, or corrugated steel pipe. Outlet pipe shall be a non-perforated corrugated steel pipe or a non-perforated smooth inside wall pipe constructed of high density polyethylene or polyvinyl chloride.

When did they start using subdrain in construction?

SUBDRAIN DESIGN AND LAYOUT Early subdrainage often consisted of placing free-draining material, mostly gravel and rock, in the axis of filled swales, as sketched above.These began to be employed in the late 1930s.