Sensing type geogrid material and structure thereof

A geogrid and sensor-type technology, applied in infrastructure engineering, sea area engineering, water conservancy engineering, etc., can solve the problems of increased monitoring difficulty and cost, undetectable, low tensile strength, etc., to avoid disturbance and sensor Insufficient durability itself, avoiding the effect of insufficient durability and large specific surface area

Active Publication Date: 2016-02-03
SHANDONG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, geogrid products usually only have a single reinforcement effect, and due to their own material strength and design problems, geogrids have low tensile strength and poor frictional resistance in actual engineering. The reinforcement effect is limited; at the same time, the existing geogrid reinforcement method cannot conveniently detect the deformation information of itself and its reinforced body. If it is to be detected, it needs the support of other equipment and technology, which increases the difficulty of monitoring and cost

Method used

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  • Sensing type geogrid material and structure thereof
  • Sensing type geogrid material and structure thereof
  • Sensing type geogrid material and structure thereof

Examples

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Effect test

example 1

[0041] Example 1: Preparation of high-strength and high-conductivity geogrid

[0042] Geogrids can be used to reinforce the subgrade and pavement of highways, airports, parking lots, etc., where the traffic flow and load are large, so higher requirements are put forward for the strength and toughness of the grid. In order to prepare a high-strength and high-toughness grid, take 70g of carbon nanotubes, 140g of superconducting carbon black, 200g of nano-active calcium carbonate and 10g of titanate coupling agent, and the mass of high-density polyethylene is 580g. Carbon nanotubes, superconducting carbon black, and nano-active calcium carbonate were baked in an oven at 80-100°C for one hour to dehumidify; then titanate coupling agent and nano-active calcium carbonate were uniformly mixed; polyethylene, carbon nanotubes , superconducting carbon black, and the mixed coupling agent are uniformly mixed with nano-active calcium carbonate again, melted and granulated through a twin-sc...

example 2

[0043] Example 2: Application of high-strength, high-friction sensing grid in engineering

[0044] Geogrids can strengthen soil and prevent uneven settlement in road and construction projects. To prepare sensory geogrids, the contents of carbon nanotubes and carbon black are selected to be 6% and 12%, respectively, and nano-active carbonic acid The calcium content is 20%, the coupling agent is 5% of the nano-active calcium carbonate content, and the high-density polyethylene matrix content is 61%. The manufacturing steps of the grid are the same as in Example 1. According to the laboratory test, its tensile strength reaches 22.51MPa, and its normalized resistivity and strain relationship is: where: Ω 0 and Ω represent the initial resistance of the grid and the resistance during tensile deformation, respectively, and ε is the strain of the grid. The fitting curve of the relationship between normalized resistivity and strain is as follows: Figure 4 shown. In actual enginee...

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Abstract

The invention relates to a sensing type geogrid material and a structure thereof. The sensing type geogrid material comprises a polymer matrix, the polymer matrix is added with carbon nanotubes and superconducting carbon black to serve as conductive filler, and the polymer matrix is high density polyethylene matrix, the carbon nanotubes account for 3%-7% of the total mass of the raw materials, and the superconducting carbon black accounts for 6%-14% of the total mass of the raw materials. The invention provides a manufacturing method of a high strength and high friction resistance sensing type geogrid, the geogrid of the type not only overcomes the problem of insufficient self-strength of traditional geogrids, but also utilizes the pull sensitive effect of conductive polymer composite materials, by detecting the electrical resistance change of the grid itself, deformation information of the grid and a reinforcing body can be obtained conveniently, and implantation of external sensors and other equipment is unnecessary, thereby avoiding disturbance to the reinforcing body and durability deficiency of the sensor itself. The sensing type geogrid material is suitable for deformation monitoring and safety early warning of geotechnical structures within a full life cycle.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a sensor-type geogrid material and its structure. Background technique [0002] Since the generation of geogrid, it has been widely used in road, water conservancy, construction and other projects, and has achieved huge social and economic benefits. As a commonly used geotechnical reinforcement material, geogrid is a two-dimensional grid or a three-dimensional grid screen with a certain height made of polymers such as polypropylene and polyvinyl chloride by thermoplastic or molding. , mostly used in reinforced soil subgrade engineering, foundation treatment and fill slope protection engineering. With the continuous improvement of the society's requirements for the quality of roads, buildings and other projects, the requirements for the performance and function of geogrids are also getting higher and higher. However, at present, geogrid products usually only have a single reinfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K7/24C08K3/04C08K3/26C08K9/04E02D3/00E02B3/00E01C3/04
CPCC08K3/04C08K3/26C08K7/24C08K9/04C08K2003/265C08K2201/011C08L2207/062E01C3/04E02B3/00E02B3/122E02D3/005C08L23/06
Inventor 崔新壮侯飞金青黄丹刘泽群张炯崔社强郑英杰汤潍泽楼俊杰
Owner SHANDONG UNIV
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