ASTM ISO HDPE Geocell In Erosion Control Railway Construction Roadbed Reinforcement

HDPE Erosion Control Geocell In Railway Construction Roadbed Reinforcement

Description 

Geocell is made of high-strength hdpe copolymer broadband, so it is also known as geocell, which is strongly welded or riveted and formed a three-dimensional mesh cell structure. It is stretchable, can be folded up when transported, open and filled with soil, stone or concrete materials when used, constituting a structure with strong lateral restriction and large stiffness. It can be used as a bedding layer, to deal with weak foundations to increase the bearing capacity of the foundation, can also be laid on the slope to form a slope protection structure, but also can be used to build the supporting structure and so on.

Plastic HDPE Geocell Technical parameter:

HDPE Geocell Production Process

The main HDPE geocell production processes include HDPE resin sourcing, geocell formation and embossing, geocell sheet cutting, honeycomb structure punching, ultrasonic welding, physical performance testing, pacaking and loading. 

Application of Geocells in Railway Construction

Geocells have significant application value in railway construction, especially in roadbed reinforcement, disease prevention and control, and special environmental adaptability under complex geological conditions. The following are its core application scenarios and technical advantages:

Railway roadbed reinforcement and disease prevention

1. Weak subgrade treatment

For the problem of railway subgrade sinking and squeezing (such as shear deformation of soil caused by train load), geocells can replace traditional sand and gravel replacement solutions. It is laid on the upper part of the subgrade to bear the roadbed load and disperse the stress. It only needs to dig out the soft soil layer equivalent to the depth of the cell, without deepening the side ditch, which improves the construction efficiency by more than 50% and reduces the cost by about 30%.

2. Half-fill and half-excavation roadbed

In slope areas with natural slopes steeper than 1:5, geocells are laid in steps to form lateral constraints, inhibit uneven settlement of new and old roadbeds, and reduce longitudinal cracks and roadbed displacement.

Adaptability to special geological conditions

1. Roadbed in frozen soil areas

In permafrost areas, geocells can reduce the problem of mud rolling caused by the lowering of the upper limit of frozen soil. Its flexible structure can adapt to the volume changes caused by freeze-thaw cycles, maintain the stiffness of the roadbed, and avoid settlement caused by temperature fluctuations.

2. Saline soil and expansive soil areas

Geocells have strong corrosion resistance and can resist the chemical erosion of saline soil and the water absorption and expansion effect of expansive soil. By limiting the lateral displacement of the soil, the roadbed is prevented from rising and cracking.

Application Method:

When infilled by compacted soil, a Cellular Confinement System (CCS) is to create a new entity with enhanced mechanical and geotechnical properties. When pressure applied to the soil contained in a CCS, it results in a lateral stress on the perimeter of the cell wall. The three-dimensional confinement area reduces the lateral movement of soil particles. the vertical load applied to contained infill lead to high stress and resistance to latera interface between cell and soil.

Constrained adjacent cell provides additional resistance filled by passive resistive load cell, while the horizontal expansion by restricting the ring of high strength. Compaction is maintained to result in long-term reinforcement.

On the jobsite, all sections of geocell are fastened together and placed directly on the surface of the subsoil or placed on the geotextile covered on the roadbed surface. the sections are stretched and expanded with stretcher. geocell extended to cover several tens of meters may consist of hundreds of individual cells, depending on the size of the section and the whole area. They are then filled with a variety of filler materials such as soil, sand, aggregate or recycled materials, and then compacted using vibration compaction.

Overall CCS can create a hard mattress to distribute the load over a wider area, reduce settlement of soft soil, improve shear resistance and load carrying capacity and reduce distortion.

Packing and Shipping