GEOSYNTHETICS WORLD

Shopping mall roof garden drainage system

2011-12-12T07:13:00.000-08:00

Laying geocomposite drainage sheets at the roof garden of a shopping mall construction. Special attention should be given to to direction of overlap considereng the backfill direction.

Announcement: LEISTER-New U.S. Headquarters and New Geo Tool

2011-10-18T08:23:00.000-07:00

Leister Makes Firm Commitment to the US Geo Industry Swiss Manufacturer Announces New U.S. Headquarters and New Geo Tool CHICAGO - October 17, 2011 - Leister Process Technologies, the worldwide leader in plastic welding and hot air equipment announces the opening of its expanded U.S. headquarters outside of Chicago. The new, centrally located facility quadruples Leister's capabilities in

2011 GEOSYNTHETICS Middle East Conference

2011-10-13T01:29:00.000-07:00

Abu Dhabi, October- Under the Patronage of the Municipality of Abu Dhabi City, the “2011 GEOSYNTHETICS Middle East Conference” will be launched with more commitment to a sustainable and environment friendly infrastructure in line with the Abu Dhabi 2030 vision. Organized by SKZ the German Plastics Centre in cooperation with its local partner BMC Gulf LLC, the conference is taking place on 25th

Gabions and geotextile video

2011-09-30T05:48:00.000-07:00

A nice video animation to show how to install gabion baskets on geotextile fabrics.

Anchorage of wickdrains

2011-09-05T03:30:00.000-07:00

During the installation of prefabricated wick drains (Prefabricated vertical drains) for soil consolidation you need some materials under the mandrel (lance) to hold the drain in the soil when you pull the mandril back.So you have to use anchor plates or anchor rods.Both is OK depending on site conditions. I find the plate more easy to use. When the mandril is pushed in the soil the plate holds

Design of green roofs (inverted roof)

2011-06-27T06:10:00.000-07:00

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

Erosion control- River banks

2011-04-27T04:56:00.000-07:00

On the river banks prefilled erosion control mats could be used. The mats may be filled with bitumen bound stone chippings, gravel or etc,. prefilled mats Selecting wider witdhs may be better (5 m wide) (depends on the project) vegetation can grow through permanent protection

Some geogrid types

2011-03-17T06:44:00.000-07:00

There are a lot of type of geogrids in the market. Depending on the production types, raw materials they may be defined in several categories. Laser welded and polyester/polypropylene bars Punched holes in a sheet followed by drawing or stretching (HDPE or PP) Polyster woven geogrids with a PVC coating Added a few photos here showing some of the geogrid types.

Traditional drainage layers

2011-02-28T04:11:00.000-08:00

To compare with the geocomposite drainage products let's remember the traditional drainage layers :) Traditional drainage layers are made of graded granular material the granular filter prevents penetration of fines into the drain (Filtration) the granular core transports the water in the plain of the filter (Drainage)

How geogrid works

2011-01-14T02:41:00.000-08:00

Below a video simply shows how geogrid works. Ofcourse there are a lot of things to do for design and applications but this video simply explains the supporting power of geogrids. Take a box and fill it with gravel. Somebody step on gravel. The gravel does not hold the person up. Then reinforce the gravel with geogrid layers. Next when you remove the box, you can see that system is supported

Soil reinforcement:Materials and design questions

2010-11-30T04:18:00.000-08:00

- Possible materials for soil reinforcementMost 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 the reinforcement ?

Standards for prefabricated vertical drains (wickdrains)

2010-10-22T02:24:00.000-07:00

ISO 12958:1999 Geotextiles and geotextile-related products -- Determination of water flow capacity in their plane ISO 10319:1993 Geotextiles -- Wide-width tensile test ISO 11058:1999 Geotextiles and geotextile-related products -- Determination of water permeability characteristics normal to the plane, without load ISO 12956:1999 Geotextiles and geotextile-related products -- Determination

Erosion control - Slopes

2010-08-24T04:23:00.000-07:00

Erosion control mat on slopes: prevent seeds washed away reinforces root system repair of heavily eroded areas

Why use PVD over sand drain

2010-07-19T03:03:00.000-07:00

Why use PVD (Prefabricated vertical drain) over sand drainInstallation of PVDs typically 6,000 linear meters per day (depending on the soil and the machine used it changes from 2000 to 8000) and result in a lower project cost. No (or less) risk of PVDs breaking during installation - sand drains can have discontinuities if mandril is withdrawn too fast. No (or less) risk of shear failure of PVDs

Extra volume in waste containment

2010-06-28T06:17:00.000-07:00

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 have about 5000 m3 of volume. But as seen in the second picture if geosynthetics materials are used in the waste disposal area a gain of extra volume will be about 300 m3 with an increase of

Composite drainage for lost shuttering

2010-05-24T05:44:00.000-07:00

Some geocomposite drainage products may be used as lost shuttering also. The drainage composites which have a cement milk-proof layer on one side, made of PVC layer (nonwoven coated with a PP film) could be used for lost shuttering. Application 1 side PVC geocomposite drains can be used as lost shuttering when installed against the foundation wall of the adjacent building, a bored pile wall, a

Typical roof garden sections

2010-03-17T09:09:00.001-07:00

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 geotextile (filter fabric) layer and gravel in between were used on top of the waterproofing layer. (mineral drainage layer) Heavy and cost more to take the gravel to the roof. Bigger load on the

Advantages of using uniaxial geogrids in reinforced soil retaining walls

2010-02-25T07:34:00.000-08:00

Advantages of using uniaxial geogrids in reinforced soil retaining walls, can be listed as follows:Fast construction in all weather conditions No mortar, dry built Optimal utilization of landFree design support (almost all the companies supply)Aesthetics: impressive & stylish designs Versatility & flexibilityCost efficiency Durability, resistance to environmental influencesAccredited by

How does erosion control mat function?

2010-01-25T04:30:00.000-08:00

Geosynthetic erosion control mats help nature to establish a natural, vegetation cover, as it : acts as an artificial root-systemholds soil particles and seedsreduces water and wind velocitiescreates a micro-climate and favours germination of seeds and growthreinforces the vegetation cover in the root-zone

Principle installation of PVD

2009-12-29T04:33:00.000-08:00

Principle installation of Prefabricated Vertical drainsSpecialized rigMandrill supported inside a leader held by crane or hydraulic excavator Mandrill pushed into soil by chains/cables driven by hydraulic engines.PVD installed inside a mandrillRhombic mandrill less disturbance (Often rectangular mandrill)

Layers of a landfill

2009-11-23T07:24:00.001-08:00

From bottom to top layers: Waste Leveling layer : Levels the top of the waste dump. Forms a foundation layer for the capping construction. Gas conducting layer : Ensures controlled removal of the gas rising to the surface of the dump. Impermeable seal : Stops the escape of gas and prevents the influx of (rain) water. Drainage layer : Removes excess (rain) water. Vegetation layer : Permits

Reasons for drainage

2009-10-12T06:33:00.000-07:00

Reduce and eliminate hydraulic pressure against structures:increase stability of geotechnical structure in case of a retaining wallreduce the weight on the structure in case of flat roofsincrease stability of cover layer in case of capping of a landfillaccelerate consolidation of soils in case of Prefabricated Vertical Drains (PVD’s)Prevent leakage through a subsoil wallcellar wallsunderground

Roof Gardens and Green roofs

2009-09-17T08:04:00.000-07:00

Two systems - Two purposesRoof gardens: To be used as a garden with rich vegetation on a thick layer of soil requires maintenanceGreen Roofs: environment-friendly roof with a thin vegetal cover not to be used as garden low maintenance vegetation (mosses,sedums, herbs) on a thin layer oflightweight substrate

Multifunctional geogrids

2009-08-27T02:54:00.000-07:00

grid embedded in nonwoven filter layersOne-step easy installation Optimal interaction with the sub-gradeHigh modulus, low strain (Enkagrid TRC)Geogrid and nonwoven geotextile togetherFunctions:Stabilization+ Filtration+ Separation

Geosynthetics erosion mats-Fields of applications

2009-07-21T05:35:00.000-07:00

Fields of application of erosion control geosynthetic mats erosion prevention for embankments and slopes protection of riverbanks against erosion support of vegetation on steep slopes and geomembranes