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design

Июн 8, 2011

Design of green roofs (inverted roof)

Another typical cross section of a green roof design. Vegetation Substrate Drainage-, filter- and protection- layer Enkadrain Roof sealing layer Separating fleece Heat insulation Vapour barrier House top / fabric

Ноя 3, 2010

Soil reinforcement:Materials and design questions

— Possible materials for soil reinforcement Most used: STEEL POLYMERS (PET, PP, PE-HD, AR, PVA) — Main design questions: What are the soil-reinforcement interaction parameters ? What is the long term design strength (TLTDS)of…

Ноя 2, 2010

Soil reinforcement:Materials and design questions

— Possible materials for soil reinforcement Most used: STEEL POLYMERS (PET, PP, PE-HD, AR, PVA) — Main design questions: What are the soil-reinforcement interaction parameters ? What is the long term design strength (TLTDS)of…

Июн 26, 2010

Extra volume in waste containment

In the construction of waste containments there is an economic advantage of using geosynthetics products. As seen in the first picture if you use traditional clay and gravel layers in the landfill you can…

Мар 24, 2010

Typical roof garden sections

Below 2 typical roof garden sections. These are only to give an idea. Of course the designs change depending on the needs in the project. The upper with conventional design. For drainage 2 nonwoven…

Авг 6, 2007

Calculation of PVD’s 3 — Kjellman formula

where: t = consolidation period (years) D = diameter of drained soil cylinder (m) d = equivalent diameter of drain (m) Ch = horizontal consolidation coefficient (m2/year) Uh = average horizontal consolidation degree

Авг 5, 2007

Calculation of PVD’s 2 — Equivalent PVD diameter

calculation assumes PVD cylindrical and draining effect dependent on periphery PVD effective periphery is 2 x width x f, where f is a correction factor allowing for: less favorable inflow to possible disturbance &…

Июл 19, 2007

Calculation of Prefabricated wick drains 1

VERTICAL DRAINAGE DESIGNS An assessment of the effect of vertical drains on the consolidation process may be made using the method proposed by Kjellman. This method is based on the assumption that the drains…