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复合土工膜-聚乙烯或聚氯乙烯的增强改性

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复合土工膜-聚乙烯或聚氯乙烯的增强改性

复合土工膜-聚乙烯或聚氯乙烯的增强改性

复合土工膜是用聚乙烯或聚氯乙烯的增强改性,压延成膜与涤纶针刺土工布热合而成,具有抗拉、抗顶破、抗撕强度高,延伸性能好,变形模量大,耐老化,防渗性能好,使用期长等特点。文章结合复合土工膜在休宁县井季水库除险加固工程中的铺设施工情况,阐述复合土工膜在堤防防渗处理中的应用。

防渗结构层,该防渗结构层包括防渗膜,防渗膜上设 复合土工网,防渗膜下面设有钠基膨润土垫。本实用新型的优点在于:增设复 合土工网大大增强对防渗膜的上部的保护,避免防渗膜在铺设渗沥液导流层过 程中或垃圾填埋场运行过程中被导流层中碎石或卵石的刺穿或划破,增强了防 渗层的安全性。

王甫洲水利枢纽土石坝包括主河床土石坝、谷城土石坝和老河道围堤,长约19km,最大坝高13m。砂砾石填筑坝体,地基为中细砂和砂砾石层。在围堤采用PE复合土工膜斜墙和水平铺盖防渗,主河床土石坝采用PVC复合土工膜心墙防渗,土工合成材料总用量达138万m~2。本文介绍了土工膜材料选择,铺设方法,接头型式等。

Composite geomembrane is a reinforced modified polyethylenePVC calendered film with polyester needle-punched geotextile heat together formed, has a tensile strength, resistance to bursting, anti-tear strengthelongation of deformation modulus, anti-aging, anti-seepage performance, the use of long. Based on a composite geomembrane in the the Xiuning wells quarter of reservoir reinforcement project in the Laying on of composite geomembrane embankment seepage control.

Impermeable layer of structure, the structural layer of the impermeable impermeable membrane, impermeable membrane based composite geonet impermeable membrane with sodium bentonite mat below. The new advantages: additional composite geonet greatly enhanced the protection of the upper part of the impermeable membrane to avoid the impermeable membrane in the process of laying the diversion layer of leachatelandfill during the operation of the diversion layer broken stonepebble piercedscratched, enhance the security of the impervious layer.

Wangfuzhou hydroproject embankment dams including the main riverbed dam, the Gucheng earth damthe old river dike, about 19km, the maximum height of 13m. Sandgravel embankment dam foundation in the fine sandsandgravel layer. PE composite geomembrane sloping wallthe blanket impermeable in the dike, the main river bed embankment dam with impervious core wall of the PVC composite geomembrane, geosynthetic material with a total capacity of 1.38 million m ~ 2. This article describes the geomembrane material selection, laying methods, joint type.