土工合成材料在广州水利工程中的应用介绍

土工合成材料在广州水利工程中的应用越来越广泛，结合具体工程案例介绍土工合成材料在广州水利工程应用的一些经验体会。土工布在水利工程中广泛应用于反滤设计，但应注意施工时被水泥浆浸泡导致排水失效的情况;土工布还可用于局部软土地基处理，但沉降量较大、沉降历时较长;在防冲槽等防冲设施与地基土之间设置土工布可有效保护基土免于冲刷破坏;土工充填袋已广泛应用于围堰和抢险工程，但由于对土工袋质量和耐久性的担心，目前还较少应用于堤防工程。同时，介绍了聚苯乙烯板块(EPS)应用于软基水闸引堤处理的实例，强调EPS应用于堤防工程要注意对表面进行覆盖保护并做好抗浮计算;介绍利用加筋技术的生态挡墙和生态袋防护技术在广州河道护岸工程中的应用情况，但由于对袋体质量和耐久性的担心影响了生态袋防护技术的推广。

Introduction to the Application of Geosynthetics to Hydraulic Projects in Guangzhou

Geosynthetics are widely used in hydraulic projects in Guangzhou city.In this article,experiences and understandings in the application of geosynthetics to hydraulic projects in Guangzhou are discussed.Geotextiles are widely used for anti-filtration design in hydraulic engineering,but attentions should be paid to the invalid drainage when geotextiles are clogged by slurry during construction.Geotextiles can also be applied to localised treatment of soft soil foundation,but the settlement is generally large and occurs over a long period.Moreover,geotextiles can be placed between erosion-resistant facility,such as anti-scour trench,and foundation soil to protect the soil from erosion damage.Soil filling geotextile bags are widely used in cofferdam and emergency projects,but rarely in em-bankment projects due to worries about their quality and durability.Furthermore,an example of EPS (expanded polystyrene sheet)used in soft soil treatment in a sluice connecting embankment is introduced,and the importance of surface protection and anti-floating calculation is pointed out.The applications of ecological retaining wall and ec-ological bags to river revetment projects in Guangzhou are also introduced.But worries about the quality and dura-bility of ecological bags affect the popularization of eco-bag technology.