What is Geotechnical special materials

30-03-2021

Geotechnical special materials


1 Geomembrane bag

Geomembrane bag is a continuous (or separate) bag-like material made of double-layer polymerized chemical fiber fabric. Concrete or mortar is poured into the bag by a high-pressure pump to form a slab or other shape structure. It is often used for slope protection or other shapes. Foundation treatment works. Film bags are divided into two categories: mechanism and simple film bags according to their material and processing technology. Machine-made membrane bags can be divided into filter drainage point membrane bags, non-reverse filtration drainage point membrane bags, concrete membrane bags without drainage points, and hinge block type membranes according to their presence or absence of filter drainage points and their shape after inflation.


2 Geonet

The geonet is a mesh geosynthetic material with a large perforation, a plane structure or a three-dimensional structure that is woven from synthetic material strips, thick strands or pressed by synthetic resin. It is used for soft foundation reinforcement cushion, slope protection, grass planting and as a base material for the manufacture of combined geotechnical materials.

Geonet


3 Geonet mats and geocells

Both the geonet mat and the geocell are three-dimensional structures specially made of synthetic materials. The former is mostly a three-dimensional water-permeable polymer mat composed of filaments, and the latter is a honeycomb or grid-like three-dimensional structure composed of geotextiles, geogrids or geomembranes, and strip polymers, which are often used as anti-erosion In soil conservation engineering, geocells with large rigidity and high confinement capacity are mostly used in foundation reinforced cushions, subgrade beds or track beds.


4 Polystyrene foam (EPS)

Polystyrene foam (ie EPS) is a developed ultra-light geosynthetic material. It is formed by adding a foaming agent to polystyrene, foaming in advance with a specified density, and then placing the foamed particles in a silo to dry and then filling them into a mold to be heated. EPS has the advantages of light weight, heat resistance, good compression resistance, low water absorption, and good self-support. It is often used as a filler for railway subgrades.


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