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Geogrid with negative poisson ratio effect, and preparation method thereof

A technology of geogrid and negative Poisson's ratio, which is applied in the field of geogrid and its preparation, can solve the problems of reinforced soil engineering, such as failure effect, negligible, and neglect of the interaction characteristics of the reinforcement-soil interface, so as to achieve the increase of the apparent friction coefficient, The effect of enhancing stability and increasing passive resistance

Pending Publication Date: 2018-06-29
SHANDONG UNIV
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Problems solved by technology

[0003] In existing studies, in order to improve the mechanical properties of reinforced soil, people often improve the stability of the filling structure by increasing the strength of the material itself, while ignoring the interaction characteristics of the reinforced soil interface that have an important impact on the engineering deformation and strength of the reinforced soil. This improvement method has little effect on solving the problem of failure of reinforced soil engineering caused by the pulling out of reinforcement

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  • Geogrid with negative poisson ratio effect, and preparation method thereof
  • Geogrid with negative poisson ratio effect, and preparation method thereof

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[0027] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0028] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0029] As introduced in the background technology, there are deficiencies in the prior art that tendons are easi...

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Abstract

The inventio discloses a geogrid with a negative poisson ratio effect, and a preparation method thereof, and solves the problems of failure in a reinforced earth project and poorer stability of a rib-earth structure since rib materials are easy to pull out in the prior art. According to the geogrid with the negative poisson ratio effect, and the preparation method thereof provided by the invention, the negative poisson ratio effect can be produced, the interaction of the rib materials and fillers is improved, the interlocking of ribs and earth is increased through node expansion, and a pseudo-friction coefficient of a rib-earth interface is increased; and a passive resistance force of grid ribs is increased, so that the stability of a high and large reinforced earth structure is improved.The technical scheme is that the geogrid with the negative poisson ratio effect comprises the grid ribs and node sleeves, wherein each two adjacent grid ribs are spliced to form a net structure through the node sleeve; small nodes are arranged at two ends of each grid rib; the small nodes of each four grid ribs are spliced to form a big node and are fixed through the node sleeve; and under an external load effect, the small nodes slide in the node sleeves , so that the node sleeves are expanded and deformed in a thickness direction, and the negative poisson ratio effect is produced.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a geogrid with negative Poisson's ratio effect and a preparation method thereof. Background technique [0002] In recent years, with the large-scale construction of infrastructure in my country, especially as the traffic road network extends to mountainous areas, there are more and more tall reinforced soil structures (high retaining walls and roadbeds with a height of more than 20m, etc.). Under the action of traffic load and natural factors (meteorology, hydrology, geology, earthquake, etc.), disasters such as deformation, cracking and even collapse of tall reinforced soil structures occur from time to time, causing heavy losses to people's lives and properties. The study found that with the increase of the fill height (overlying pressure), the growth rate of the shear stress between the reinforcement and soil decreases. When the fill increases to a certain height, the increase...

Claims

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Application Information

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IPC IPC(8): E02D3/00B29D28/00
CPCE02D3/00B29D28/00
Inventor 崔新壮苏俊伟李骏卢途金青王艺霖
Owner SHANDONG UNIV
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