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Two-way stretch soil mass reinforcement grating and manufacturing method thereof

A biaxial stretching and manufacturing method technology, applied in metal processing, soil protection, construction, etc., can solve the difficult adjustment and realization of stretching plastic geogrid processing technology, geogrid torsional rigidity and mesh stability low, does not meet the needs of high-strength two-way grilles, etc., to achieve significant economic and social benefits, improve torsional rigidity and mesh stability, and save engineering costs

Pending Publication Date: 2020-02-11
青岛旭域土工材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The reinforcement performance of the two-way integral tensile grid is excellent, but the current strength is up to 50 kN / m, which does not meet the needs of special projects for high-strength two-way grids
[0006] 2) The vertical and horizontal strength of the geogrid product is equivalent, which does not meet the requirements of special projects that require high strength in the main force direction of the product and low strength requirements in the other direction
And vertical and horizontal equal strength also causes economic waste
[0007] 3) The torsional stiffness and mesh stability of geogrid products are low
[0008] 4) Although the longitudinal strength of uniaxially stretched plastic geogrid is high, the transverse strength is very low
However, this patented technology is more suitable for stick-welded grids, and it is difficult to adjust and realize the processing technology of tensile plastic geogrids, and the patent is only transverse strength>longitudinal strength

Method used

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  • Two-way stretch soil mass reinforcement grating and manufacturing method thereof
  • Two-way stretch soil mass reinforcement grating and manufacturing method thereof
  • Two-way stretch soil mass reinforcement grating and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0055] The process design parameters are: the longitudinal dimension a of the mesh 3 is 40 mm, the transverse dimension b of the mesh 3 is 20 mm, the ratio of the longitudinal tensile strength to the transverse tensile strength of the biaxially stretched plastic geogrid is 5:1, The thickness of the plastic extruded sheet is 4mm, and the size of the punch is selected as a1 and b1 are both 4mm punches. The arrangement of the punching holes is: the vertical spacing a2 of the punching holes is 12mm, and the horizontal spacing b2 of the punching holes is about (12-4)×(5:1) / (40:20)+4=24mm. The longitudinal stretch ratio is 40 / 4=10, and the transverse stretch ratio is 20 / 4=5. After pulling out the product, the longitudinal tensile strength is 75.2kN / m, the transverse tensile strength is 18.7kN / m, and the ratio of longitudinal and transverse tensile strength is about 4:1

[0056] Adjust the size of the punch, and adjust the longitudinal spacing a2 to 4+(12-4) / 18.7×(18.7-15)=5.6mm. A...

Embodiment 2

[0058] The process design parameters are: the longitudinal dimension a of the mesh 3 is 20mm, the transverse dimension b of the mesh 3 is 40mm, the ratio of the longitudinal tensile strength to the transverse tensile strength of the biaxially stretched plastic geogrid is 1:5, and the plastic The thickness of the extruded sheet is 8mm. The punch size is 4mm*8mm punch. The arrangement of the punching holes is: the horizontal spacing b2 of the punching holes is 13mm, and the vertical spacing a2 of the punching holes is (13-8)×(5:1) / (40:20)+4=16.5mm. Then the longitudinal stretch ratio is 20 / 4=5, and the transverse stretch ratio is 40 / 8=5. After pulling out the product, the longitudinal tensile strength is 12.2kN / m, the transverse tensile strength is 55.6kN / m, and the ratio of longitudinal and transverse tensile strength is about 1:4.56.

[0059] Adjust the size of the punch, and adjust the punching horizontal spacing b2 to 13-(13-8) / 12.2×(12.2-11.2)=12.6mm. After pulling out t...

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Abstract

The invention provides a two-way stretch soil mass reinforcement grating and a manufacturing method thereof. The two-way stretch soil mass reinforcement grating comprises meshes, longitudinal bars andtransverse bars which are formed by stamping extrusion boards and conducting two-way stretch. The two-way stretch soil mass reinforcement grating is characterized in that the tensile strengths of thetwo-way stretch soil mass reinforcement grating in the longitudinal direction and the transverse direction are different, the ratio of the tensile strength in the high strength direction to the tensile strength in the low strength direction is 2:1-6:1, and the ratio of the cross sectional area of the bars in the high strength direction to the bars in the low strength direction of the two-way stretch soil mass reinforcement grating is 1:1-4:1. The tensile strength of the two-way stretch soil mass reinforcement grating in the high strength direction is 50 kN / m, and the tensile strength in the low strength direction is not lower than 10 kN / m. The mechanical performance of the grating product in the main stress direction in engineering application is greatly improved, and meanwhile, it is guaranteed that the grating product has proper mechanical performance in the secondary stress direction; besides, the torsional stiffness and mesh stability of the grating product are greatly improved, and thus the effect of reinforcing the base layer is improved.

Description

technical field [0001] The invention belongs to the technical field of geotechnical materials, in particular to a two-way tensile soil reinforced grid and a manufacturing method thereof. Background technique [0002] Tensile plastic geogrid is a planar network structure geogrid made of high-density polyethylene or polypropylene as raw material, plasticized, extruded, punched, and stretched as a whole. It is divided into one-way and two-way. The two-way tensile soil reinforced grid is mainly used for road, railway and other embankment slopes, foundation treatment, etc., which can effectively improve the bearing capacity of the foundation. [0003] The vertical and horizontal strength of the overall tensile two-way grid on the market is equal, and the maximum strength is 50kN / m. However, in many actual projects, the strength of the 50kN / m geogrid is relatively low. In order to meet the stability of the deep sliding of the embankment slope, a geogrid with higher strength is ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00B29C55/12B26F1/02
CPCB26F1/02B29C55/12E02D3/005
Inventor 杨宝和郑鸿袁绍鹏王亚忠戴征杰周可庆陈丽丽徐方军孙付洲王延峰宗屹夏飞
Owner 青岛旭域土工材料股份有限公司
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