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土工合成材料——土工膜是一种新型的防渗材料,其防渗指标为：水蒸气渗透系数不大于1．0×10-13g·cm/(c(b)·s·pa)。近年来,土工膜以其优越的物理机械性能、化学性能、热力学性能和耐久性能得到了工程界的普遍重视。复合土工膜是以土工织物为导水层,以高分子材料为防渗层,采用高压连续本体聚合方法,经压延、热熔、涂敷而成的,产品具有质量轻、柔软、抗拉强度高、变形能力强、防渗性能好、施工方便、造价低等优点,可在水库、渠道、隧洞、蓄水池等防水防渗的水利工程中广泛应用。去年,我们走访了一些利用土工膜进行防渗处理的干渠工程,据调查了解,所有防渗渠道通过两年多时间的运行观察,土工防渗膜起到了良好的防渗作用。经防渗处理的渠道漏水、渗水现象消失了,节水效果也十分显著。笔者在此重点谈谈土工膜防渗渠道的施工工序。
Geosynthetics - Geomembrane is a new impermeable material, the anti-seepage indicators: water vapor permeability coefficient of not more than 1.0 × 10-13g · cm / (c (b) · s · pa). In recent years, geomembrane with its superior physical and mechanical properties, chemical properties, thermodynamic properties and durability has been the general attention of engineering. Composite geomembrane is a geotextile for the aquifer, the polymer material for the impermeable layer, using high-pressure continuous bulk polymerization, the calendering, hot melt, coated and made of products with light weight, soft, tensile strength High deformation resistance, good impermeability, easy construction, low cost, etc., can be widely used in water and impervious water conservancy projects such as reservoirs, channels, tunnels and reservoirs. Last year, we visited a number of canal works using geomembranes for seepage control treatment. According to the survey, all seepage prevention channels operated through more than two years of operation and geo-impermeable membrane played a good role in preventing seepage. Leakage through the seepage control channels, water seepage disappeared, water-saving effect is also very significant. The author here to talk about the construction of impermeable geomembrane canalization process.