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Low-heat shrinkage geogrid and preparation method thereof

A geogrid and low-heat technology, applied in sea area engineering, water conservancy engineering, coastline protection, etc., can solve the problems that cannot be used in the dam bottom of pumped storage power stations, etc., and achieve good load transfer performance, reduce wear, and high load capacity. Effect

Inactive Publication Date: 2012-06-27
CHANGZHOU TIANMA GROUP CO LTD
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  • Application Information

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Problems solved by technology

[0003] Chinese patent document CN1233901C discloses a non-woven reinforced pressure-sensitive geogrid. The warp and weft yarns used are glass fiber bundles. The mesh size of the geogrid is 25.4mm×25.4mm. Dry setting, secondary drying pressure-sensitive adhesive, this geogrid is used for pavement reinforcement of ordinary asphalt roads or subgrade soft foundation treatment, not for pumped storage power station dam bottom

Method used

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  • Low-heat shrinkage geogrid and preparation method thereof
  • Low-heat shrinkage geogrid and preparation method thereof
  • Low-heat shrinkage geogrid and preparation method thereof

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Embodiment 1

[0019] See Figure 1 to Figure 4 , The low thermal shrinkage geogrid of this embodiment has a mesh gray cloth 1 and reinforcements. Net fabric 1 is to be made by four groups of warp yarns 11 and two groups of weft yarns 12 by knitting chain lines 13 through a warp knitting machine. The reinforcement is arranged around the mesh gray cloth 1, and is bonded and fixed on the monofilaments of the warp yarn 11 and the weft yarn 12 of the mesh gray cloth 1 and between these monofilaments, so that the mesh gray cloth 1 and the reinforcement are bonded together to form a e s.

[0020] The material of the warp yarn 11 and the weft yarn 12 in the mesh gray cloth of the present embodiment is high-strength high-modulus polyester fiber tow, and the material of the used chain thread 13 is high-strength low-shrinkage polyester filament.

[0021] In this embodiment, the monofilament surface of the warp yarn 11 and the weft yarn 12 is coated with a wear-resistant oil agent composed of unsatur...

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Abstract

The invention discloses a low-heat shrinkage geogrid and a preparation method thereof. The low-heat shrinkage geogrid is provided with mesh fabric and reinforcer, wherein the mesh fabric is weaved by warps and wefts through chaining threads by using a warp loom. The warps and the wefts are both made of high-modulus high-intensity polyester fiber synnema, the grid size a*b of the geogrid is 38mm-42mm*38mm-42mm, and the heat shrinkage of the geogrid under 180 DEG C is no greater than 0.5 percent. The preparation method comprises the following steps of: weaving the warps and the wefts through the chaining threads by using the warp loom into the mesh fabric; putting the mesh fabric into a maceration tank filled with a reinforcing treatment agent; drying for the first time; and drying for the second time. The geogrid can meet the requirement for heat shrinkage no greater than 0.5 percent at 180 DEG C, and is suitable for the high-temperature paving at the dam bottom of a pumped storage power station.

Description

technical field [0001] The invention relates to a geogrid and a preparation method thereof, in particular to a low thermal shrinkage geogrid suitable for the dam bottom of a pumped storage power station and a preparation method thereof. Background technique [0002] Before the asphalt concrete is poured at the bottom of the dam, a layer of geogrid needs to be paved to reinforce and strengthen the bottom of the dam. Since the temperature of asphalt concrete paving is usually as high as 180°C, the thermal shrinkage of ordinary geogrids at this temperature is relatively large, which cannot meet the requirements. [0003] Chinese patent document CN1233901C discloses a non-woven reinforced pressure-sensitive geogrid. The warp and weft yarns used are glass fiber bundles. The mesh size of the geogrid is 25.4mm×25.4mm. Dry setting, secondary drying pressure-sensitive adhesive, this geogrid is used for pavement reinforcement of ordinary asphalt roads or subgrade soft foundation trea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B7/02D04B21/08D06M13/203D06M15/00D06M15/263D06M101/32
Inventor 宣维栋史建军方文叶朱忠裕王友存张从勇
Owner CHANGZHOU TIANMA GROUP CO LTD
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