Drainage- retaining wall-geocomposite sheet drain

To prevent the water pressure behind the retaining walls a drainage layer is generally needed. The convetional method is to use gravel behind the wall and leave some holes on he wall. The water leakage from these holes causes bad view . And sometimes the gravel may be expensive with the transportation costs.



One of the easiest methods is to use geocomposite drainage sheets.



In this project seen on the pictures a geocomposite drainage sheet have been used. The drainage material was made of a 3 dimensional drainage core which lets water go to any direction and a special filter which is resistant to clogging.



The drainage layers were installed vertically by simple methods. They nailed.



The most important thing is you should pay attention to the overlap direction. Because if you start backfilling with the help of a heavy machine like an excavator the overlaps should look to the opposite side of backfilling.



If you backfill from the front (directly on the drain) there is no problem.

Applications of uniaxial geogrids

Some Applications of uniaxial geogrids

• Bridge abutments
• Steep slopes
• Walls
• Embankments
• Segmental retaining walls
• Landfill capping
• Landfill foundation
• Topsoil stabilization
• Structures over mining areas

What is drainage?

Drainage is the removal of excess water from land by means of surface or subsurface conduits, pipes or other systems.

Horizontal usage of wickdrains (prefabricated vertical drains-PVD)

I think the first project that the wickdrains have been used was in Belgium, in the Brussels Metropolitan Transport system. The second may be the Eskisehir light rail tram system.

Actually the main application of PVD's are in soil consolidation. But in this tram project it was used to collect the leakage water to prevent not to pass the lower section to cause rusting. So, if it is a good drainage material and if it works also horizontally why not we use horizontally.

Colbondrain (a Dutch made PVD from Colbond geosynthetics bv.) was laid horizontally, and to collect more water they made some loops upwards.

Building - Sound Reduction

Enkasonic® - sound control matting

Application:

Enkasonic® is used as sound control matting beneath ceramic tile, marble, wood vinyl or carpet flooring in both wood frame and concrete slab constructions. Due to its reduced thickness (10 mm), Enkasonic® E is ideal for both new constructions and retrofit. In addition to acting as a sound reduction layer, Enkasonic® E also contributes to the thermal insulation of the floor.

Benefits:
• Easy to install

• Used to create “void” essential for sound insulation

• Resilient enough to absorb impact sound

• Ideal for new construction and rehab projects

Installation:

For the installation of Enkasonic®, the following steps should be followed:
• Ensure proper sub-floor strength

• Install perimeter isolation strip to prevent impact sound

• transmission through floor- wall contact area

• Place Enkasonic® on top of sub-floor and tape joints

• Place the overlay on top of Enkasonic®

• Place the floor covering on top of the overlay