Introduction to Jilin Tonghua Geocell

Geocell is a three-dimensional mesh cell structure formed by high-strength welding of reinforced D-sheet materials. Generally made by ultrasonic needle welding. Due to engineering needs, some holes are drilled in the diaphragm. Geocell is a three-dimensional mesh cell structure formed by high-strength welding of reinforced D-sheet materials. Generally made by ultrasonic needle welding. Due to engineering needs, some holes are drilled in the diaphragm.
Geocell is a three-dimensional mesh cell structure geocell
Geocell
formed by high-strength welding of reinforced D sheet materials. Generally made by ultrasonic needle welding. Due to engineering needs, some holes are drilled in the diaphragm.
It has the ability to stretch freely for transportation and can be folded during construction. It can be stretched into a mesh shape and filled with loose materials such as soil, gravel, concrete, etc. to form a structure with strong lateral restraint and high stiffness.
, light material, stable wear resistance and chemical properties, resistance to light and oxygen aging, acid and alkali resistance, suitable for different soil conditions such as deserts and deserts.
, high lateral limit, anti-skid and anti-deformation, effectively enhance the bearing capacity of the roadbed and disperse the load.
Changing geocell height, welding distance and other geometric dimensions can meet different engineering needs.
, can be easily retracted and transported, small in size, convenient in connection and fast in construction.
Collapse and edit this section Basic Principles of Geocells
The reason why geocells have excellent functions and have attracted attention from the engineering community should start with their basic principles. When describing its principle, foreign literature calls it a honeycomb three-dimensional confinement system that can significantly improve the performance of ordinary filling materials in load-bearing and erosion control applications over a wide range. Its key principle is three-dimensional restriction. Everyone knows that when a car drives on the desert, it will make two deep ruts, and the pressed part will sink deeply, and the two sides of the rut will bulge high. If the vehicle behind continues to move along the rut, the sunken part will sink further, and the raised part will rise further until the raised part rubs against the chassis of the vehicle. The sunken rut will bury most of the wheels, making it impossible to move forward. The reason for this is that when an external load acts on the surface of the foundation, according to Plantel's theory and Taylor's theory, it can be known that under the action of the concentrated load, the active zone sinks under pressure and decomposes the force to both sides and transmits it to the transition zone. If it is passed to the passive zone, the passive zone will deform and bulge without restriction.
Product Features:
, freely telescopic for transportation, retractable and foldable. During construction, it can be stretched into a mesh shape and filled with loose materials such as soil, gravel, concrete, etc. to form a structure with strong lateral restraint and high stiffness.
, light material, stable wear resistance and chemical properties, resistance to light and oxygen aging, acid and alkali resistance, suitable for different soil conditions such as deserts and deserts.
, high lateral limit, anti-skid and anti-deformation, effectively enhance the bearing capacity of the roadbed and disperse the load.
Changing geocell height, welding distance and other geometric dimensions can meet different engineering needs.
, can be easily retracted and transported, small in size, convenient in connection and fast in construction. That is to say, once the load acts on the subgrade, a tapered active area will be formed under the load, which will then be squeezed through the transition area, causing the passive area to bulge. That is to say, the bearing capacity of the foundation is determined by the shear force along the slip line and the forces in the active, transitional and passive areas of movement. Not only can you clearly experience the true process of the above principles on sand bases, but you can also find this kind of model on soft base roads, but the rate of formation is slower than the changes on sand. Even better road base materials are still unable to prevent lateral movement. Generally, the roadbed of highways is several meters above the ground. It is not easy to absorb water and muddy the roadbed, but long-term settlement still exists. Rainwater penetration, material loss, and base subsidence are some of the reasons. The lateral displacement of materials to both sides of the roadbed section under the action of long-term rolling and vibration forces of wheel loads is undeniably another very important reason. Taking highways at all levels in various parts of our province as an example, it can be clearly felt that a groove-like belt has been pressed out of the road on the main carriageway of the road. Some expressways are no exception. The bumps felt by a car when driving on the carriageway are obviously stronger than when driving on an overtaking zone. This is especially obvious at the road-bridge connection section (commonly known as bridgehead jumping). This trench-shaped roadbed settlement is a typical example of lateral slippage of roadbed materials.
There is no need to go into details about the conventional methods of treating subgrade in engineering. The purpose is to improve the shear resistance and friction of the foundation material, reduce or delay the ability of the foundation material to move under the pressure or vibration of the load. Therefore, the requirements for materials in the project are There are bound to be many harsh restrictions. If the required materials cannot be obtained nearby, these materials need to be outsourced. The cost of purchasing materials and transportation costs account for a large part of the entire project cost. By using geocells, materials can be obtained locally or nearby and even materials that cannot be used under normal circumstances can be used, thereby greatly reducing material purchase costs and transportation costs. Why is this happening? A schematic representation of the load-bearing conditions of geocells: the active zone that is stressed under concentrated load will still transfer the force to the transition zone, but due to the lateral restrictions of the cell wall and the reaction force of the adjacent cells And the lateral resistance formed by the friction between the filler and the cell wall suppresses the lateral movement tendency of the transition zone and the passive zone, thereby improving the bearing capacity of the roadbed. After experiments, the apparent cohesion of medium-density sand can be increased more than thirty times under the confinement of the cell. Obviously, if the shear resistance of the subgrade material can be increased or the movement of the three areas can be suppressed, the bearing capacity of the foundation can be improved. This is the limiting principle of geocells. As a new type of synthetic material, geocells have begun a lot of research and development work in Europe and the United States and other countries in the late 1980s and early 1990s. Tests and field applications have proven that geocells are effective in improving general fill soil's ability to withstand dynamic loads and roadbed protection. Great effect. In the early 1990s, our country began the development and research of geocells on the basis of absorbing advanced foreign experience and made major breakthroughs in the application of fixed loose media for road bed disease remediation. As people further understand the characteristics of geocells, it has been discovered that they have irreplaceable advantages with other geotechnical materials (geotextiles, geomembranes, geogrids, geomold bags, geonets, etc.), making them unique applications in many fields. prospect.
Collapse and edit this section Geocell engineering application
, Processing of half-filled and half-filled subgrade
When building an embankment on a slope with a natural slope of less than: When building or rebuilding roads in phases and widening them, steps should be excavated at the junction of the new and old roadbed fill slopes. The width of the steps on high-grade highways is generally 1. Geocells are laid on the horizontal surface of each step and the facade side limits of the geocells themselves are used for reinforcement. The effect is better to solve the problem of uneven subsidence.
, Roadbed in windy and sandy areas
The roadbed in windy and sandy areas should be mainly low embankment. The filling height is generally not less than... Due to the professional requirements of low roadbed and heavy load-bearing for roadbed construction in windy and sandy areas, geocells can be used for The loose fill acts as a lateral limit to ensure that the roadbed has high stiffness and strength within a limited height to withstand the load stress of large vehicles.
, Back-of-table subgrade filling reinforcement
Using geocells can better achieve the purpose of back-of-table reinforcement. Geocells and fillers can generate sufficient friction to effectively reduce the friction between the subgrade and structures. The uneven settlement can ultimately effectively alleviate the early impact damage of the bridge deck caused by the abutment jumping disease.
, Roadbed in permafrost areas
When constructing fill roadbed in permafrost areas, the minimum fill height should be reached to prevent grouting or causing excessive settlement of the embankment due to the lowering of the upper limit of the frozen layer. The unique facade reinforcement effect and effectively implemented overall confinement of geocells can ensure the minimum fill height in some special areas to the greatest extent and make the fill have high-quality strength and stiffness.
, Treatment of collapsible loess subgrade
For expressways and first-class highways passing through collapsible loess and loess sections with good compressibility, or the allowable bearing capacity of the foundation of high embankments is lower than the combined vehicle load and embankment When the pressure of its own weight is applied, the roadbed should also be treated according to the load-bearing capacity requirements. At this time, the superiority of geocells will undoubtedly become apparent.
, saline soil, expansive soil
Reinforcement measures are adopted for the shoulders and slopes of first-class highways built with saline soil and expansive soil. The facade reinforcement effect of the cells is the best among all reinforcement materials. It has excellent corrosion resistance and can fully meet the requirements for constructing high-speed roads in saline soil and expansive soil.
Collapse and edit the components of this section
A geocell is a mesh structure formed by strong welding or riveting of high-strength D or copolymer wide bands. It is flexible and can be folded up during transportation and opened when used, and filled with earth, stone or concrete materials to form a structure with strong lateral restraint and high stiffness. It can be used as a cushion to treat weak foundations to increase the bearing capacity of the foundation. It can also be laid on slopes to form slope protection structures. It can also be used to build retaining structures.
Collapse and edit this section is mainly used
to stabilize road and railway roadbeds.
, used for load-bearing embankments and shallow water river management.
, a hybrid retaining wall used to prevent landslides and load gravity.
, when encountering soft ground. The use of geocells can greatly reduce the labor intensity of construction and reduce the thickness of the roadbed. The construction speed is fast and the performance is good, which greatly reduces the project cost.