Effectively Strengthen The Bearing Capacity Of Subgrade And
Evacuation Load Geocell Confinement System
Brief Introduction of Geocell Confinement System
Geocell is a kind of three-dimensional reticulated cell structure,
which is made of REINFORCED HDPE sheet material and welded by
high-speed welding. Generally by ultrasonic needle welding. Due to
engineering needs, some holes are drilled on the diaphragm. It can
stretch freely, shrink and fold when transporting, open and fill
with earth rock or concrete material when in use, forming a
structure with strong lateral restriction and large stiffness. It
can be used as cushion to treat soft foundation and increase the
bearing capacity of foundation. It can also be laid on the slope to
form slope protection structure, and can also be used to build
retaining structure.
Geocell Confinement System Characteristic
Geocell is a kind of engineering data which is widely used and
engineering mechanical function has been improved. It has the
advantages of flexible expansion, small transportation volume,
convenient connection and fast construction speed. It has been used
in some foreign projects for a long time, and geocell manufacturers
have been gradually promoting it in recent years. It is mainly used
in soft foundation treatment of engineering, foundation bed
reinforcement of railway and highway, greening of river slope,
jumping bridge head of bridge joint, greening of river dam slope,
reinforcement and anti-corrosion, etc.
| Specification | cell height Hmm | welding spacing: AMM | welding spacing: AMM | weld tensile strength: kn |
| GS20 | 200 | 400 | 25 | 2 |
| 330 |
| GS15 | 150 | 400 | 25 | 1.5 |
| 330 |
| GS10 | 100 | 1000 | 25 | 1 |
| 470 |
| 400 |
| 330 |
| GS8 | 80 | 1000 | 25 | 0.8 |
| 470 |
| 400 |
| 330 |
| GS5 | 50 | 470 | 25 | 0.5 |
| 400 |
| 330 |
Geocell Confinement System Construction site
(1) Geocell tensioning. The integrity of geocell should be checked
before on-site tensioning, and the broken geocell should not be
used. When the geocell is tensioned, the tensile force should be
controlled to ensure that the geocell is restored without
deformation or damage.
(2) Geocell cutting. The laying length of geocell must be 1m larger
than the width of subgrade. When the length exceeds the width of
the subgrade and needs to be cut, the material in the grid must be
filled before cutting to ensure that the grid does not retract.
When cutting, in order to ensure that the materials inside the grid
do not leak out, it must be cut along the middle of the blank which
has not been filled with materials outside the subgrade.
(3) Geocell filler. After the geocell is laid, it should be filled
with materials within one day and covered within two days to avoid
the aging and embrittlement of geocell materials caused by strong
ultraviolet light. When filling geocell materials, manual and
mechanical filling can be used to improve the work efficiency. The
material can be hooked into the cell with an excavator, and then
paved and tamped manually. After the cell is filled with materials,
it shall be filled with 10 cm gravel or medium coarse sand, and
then covered with soil. In order to ensure that the cell will not
be damaged, 60 cm soil must be filled before heavy roller is
allowed to roll.
Key points of process quality control in Geocell Confinement System production
1> The quality of the board directly affects the performance of
the geocell manufacturer. In order to ensure the plasticization of
resin, the * * single screw extruder with screw diameter of Φ 150
mm should be selected. The width of the plate is 1.0-2.0m, the
thickness is 2-5mm, the surface should be flat and smooth, without
bubbles, delamination or impurities, and the allowable thickness
error is ± 0.2mm
2>. The mesh is processed by step-by-step automatic precision
drilling machine, and the frequency of the punching machine must be
in line with the production of the plate. Matching drawing speed,
continuous automatic drilling. The diameter of plastic grid mesh is
generally Φ 8 ~ Φ 15mm, and the hole distance is less than 20mm.
The edge of forming hole is required to be smooth without flash to
ensure the smooth progress of subsequent stretching.
3.> Temperature control Preheating temperature is the key to the
size uniformity of tensile geogrid, which is closely related to the
production speed. Generally, when drawing HDPE plate, the
temperature is controlled at 140 ~ 160 ℃. Due to the small
temperature error range, the heating mode is particularly
important. Generally, the heating medium is water, which is heated
to the specified temperature by electric heater. The plate is
evenly heated through the preheating water tank and then stretched
Oval grid.
4> Control of drawing speed Geogrid is formed by slowly heating
and stretching to make the polymer molecular chain highly oriented
along the stretching direction. The process requirements are
strict. The stretching rate determines the stretching ratio and the
physical properties of the geogrid. Generally, the stretching ratio
can be adjusted at 5-8 times. The tensile strength of the geogrid
without stretching is only 20-35mpa, while that of the geogrid with
high stretching orientation can reach 150MPa
About Hengquan
