Method for preparing sensing type plastic geogrids

A geogrid and sensing technology, applied in the field of civil engineering, can solve the problems of inability to strengthen the deformation information detection of solids, single reinforcement effect, increase the difficulty and cost of detection, etc., and achieve the effect of avoiding the reduction of deformation test accuracy.

Active Publication Date: 2014-11-12
SHANDONG UNIV
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the current geogrid products only have a single reinforcement effect, and cannot detect the deformation information of the reinforced body. If it is detected, other equipment is required, which increases the difficulty and cost of detection.

Method used

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  • Method for preparing sensing type plastic geogrids
  • Method for preparing sensing type plastic geogrids
  • Method for preparing sensing type plastic geogrids

Examples

Experimental program
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Effect test

preparation example Construction

[0033] The preparation method of sensory plastic geogrid of the present invention, the steps are as follows:

[0034] (1) Determination of the filling amount of superconducting carbon black

[0035] In order to obtain the required composite material, the development of the composite material is carried out in the laboratory by means of an experiment. High-density polyethylene is selected as the base material, and the conductive masterbatch added with superconducting carbon black is used as the filler. The conductive masterbatch accounts for the mass of the mixture. In the range of 40% to 60%, the two are melted and mixed, plasticized and extruded, then cooled and granulated to obtain a conductive composite material. In order to ensure the uniformity of the composite material, it is mixed and plasticized for several times. Granulate and use after obtaining the desired composite material.

[0036] (2) Sensitive polymer deformation-resistance calibration

[0037] The tensile te...

example 1

[0044]Example 1: Preparation of sensory plastic geogrid for roads

[0045] In road engineering, geogrids are mainly used to reinforce soil and prevent settlement. In order to prepare sensor-type plastic geogrids suitable for roads, a conductive composite material with a filler ratio of 45% was selected (its normalized resistivity and strain The relation is Such as Figure 5 Shown), the production process of the ratio composite material is as follows: the base material HDPE and the superconducting carbon black master batch are prepared and mixed according to the mass ratio; the mixture of the two is melted and extruded through an extruder, and pelletized after cooling. The high-density polyethylene composite material was obtained. In order to ensure the uniformity of carbon black in the composite material, the prepared composite material particles were re-melted and re-granulated. The re-granulated process was repeated twice to obtain a composite material with good uniformity...

example 2

[0046] Example 2: Preparation of sensor-type plastic geogrid for mines

[0047] During mine production operations, the stability and firmness of the roadway is the guarantee of safe production. To reinforce the roadway, the method of burying and hanging geogrid is usually used, which not only improves the robustness of the roadway, but also reduces the construction cost. But even so, due to factors such as confining pressure, the roadway wall will still be deformed and damaged, or even collapsed, resulting in loss of life and property. If special equipment is used for regular inspection, it will be time-consuming, laborious, and inconvenient to operate. The above problems can be solved by laying sensor-type geogrid. The composite conductive high-density polyethylene composite material (carbon black is the conductive filler) with a filler mass ratio of 48% is selected as the raw material (the relationship between the normalized resistivity and strain is Ω ...

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Abstract

The invention discloses a method for preparing sensing type plastic geogrids. The method comprises the following steps: step (1) manufacturing a conductive composite material by selecting high density polyethylene as a base material and conductive master-batches to which super conductive carbon black is added as padding; step (2) conducting a tensile test on the conductive composite material indoors, and determining the relationship between the deformation and resistance variation of the conductive composite material; step (3) preparing sensing type grids by utilizing the conductive composite material; and step (4) determining the net type of the sensing type grids, namely adding regular hexagonal additional bars on parallel main bar columns of the sensing type grids. By utilizing the pulling sensitive characteristic of conductive plastic, the deformation information of the geogrids is obtained by testing the resistance of the grids, a sensor does not need to be buried in a soil body, and thus the phenomena that the deformation test precision is reduced due to the implantation of the external sensor and the durability of the sensor cannot meet requirements are avoided.

Description

technical field [0001] The invention provides a method for preparing a sensor-type plastic geogrid added with superconducting carbon black, which belongs to the field of civil engineering. Background technique [0002] Reinforced soil structure series products have been widely used in road engineering, water conservancy engineering, and mining engineering due to their advantages of economy, beauty, earthquake resistance, durability, and ease of construction. The development and use of geosynthetic materials has a history of decades. High-performance raw materials endow geotechnical products with high strength and durability. At the same time, research shows that the use of geosynthetics in engineering requires an increase of 1% to 2% of the original investment, and under the same design standards, it can be reduced by 20% to 40%. % of the project cost, the economic benefit is very significant, geogrid is a typical representative of reinforced soil structure series products. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D28/00E02D3/00E02D1/00
Inventor 崔新壮隋伟张炯汤潍泽楼俊杰高智珺
Owner SHANDONG UNIV
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