Abstract
In this paper, we have studied the high strength geocell development technology route, analyzed the rules of the tensile properties and creep properties of geocell, and established the relationship between elongation of stress and time, thus providing theoretical foundation for the development and engineering application of the new material. Through theoretical analysis, experimental research and numerical simulation, the characteristics, raw materials and craftsmanship of the geocell have been studied. The research is given on its stress and deformation rules based on elongation test and creep test. The rationality of the experiment is verified through numerical simulation and the conclusions are as follows: (1) With the research on the geocell traditional craftsmanship, combined with new technologies such as special ultrasonic welding technology, intelligent optical fiber technology and fixed locking plate technology, a new-type of safety forewarning high strength geocell can be developed. (2) Based on the geocell material characteristics, the elongation test and creep test are carried out and the tensile yield strength exceeds 250Mpa; the joint is welded by special crafts and the tensile strength ≥2000N/cm. (3) With FLAC3D numerical simulation, simulation study is performed on the mechanical properties of the new cell. Through analyzing the relationship between stress and strain, and time and displacement, the safety design and management construction of the new-type of geocell was proposed based on the actual situation of simulation. (4) The innovation points of the new-type of geocell include: the optimization technique of whole tensile yield strength, fall proof technique of lock parts, and positioning and effective monitoring technique, which effectively solves the geological problems of special projects such as ecological afforestation, sand fixation and high slope soft subgrade, and ensures the quality of the project and has high economic benefits.
Highlights
Geocell is a new-type of geosynthetic with high strength, good stability, convenient installation and low price
(2) Based on the geocell material characteristics, the elongation test and creep test are carried out and the tensile yield strength exceeds 250Mpa; the joint is welded by special crafts and the tensile strength ≥2000N/cm. (3) With FLAC3D numerical simulation, simulation study is performed on the mechanical properties of the new cell
(1) On the basis of great enhancement of the indexes as joint tensile strength and sheet tensile yield strength, safety forewarning composite integral strong geocell introduces the concept of optical fiber and is connected by armor fiber coated with special armor
Summary
Geocell is a new-type of geosynthetic with high strength, good stability, convenient installation and low price. It is widely used in the reinforcement of foundation engineering and the treatment of soft ground. With the increase in the diversity of engineering, geological conditions and construction difficulty, the traditional modified polyolefin geocell currently being used can no longer meet engineering requirements. In the process of soft soil foundation engineering treatment, with the increase of the complex geology, many possible problems often arise with geocells used in engineering. With the harsher engineering construction geological conditions and the higher global market’s requirements for intelligence, security stability, ageing resistance and good component connection function of geocell, it’s an urgent need to develop and study more intense, more stable, safer and more adaptable new-type of geocell to meet the requirements of construction engineering development
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