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众所周知,雨衣穿在身上可以防止雨水浇透。近些年我们南京地区给一些堤坝也穿上了“雨衣”而且达到了明显的防渗效果。大家听了可能觉得新鲜,这究竟是怎么回事呢?话还得从头说起。南京地区位于长江流域下游,江河纵横,水系发达。沿江大多为底洼圩区,要发展工农业生产和保障人民生命财产安全。全得凭仗于堤防,这个地区主要江河堤防长度少说也有2,000多公里,但是堤身土质较差,一部分江段堤防存在渗漏现象,其中较严重的约百余公里。远的不提,1983年长江遇历史大洪水时,南京
As we all know, raincoats worn on the body to prevent drenched rain. In recent years, we in Nanjing area to some dams also put on the “raincoat” and achieved significant seepage prevention effect. If you listen to something that may feel fresh, what is going on? Nanjing is located in the lower reaches of the Yangtze River, rivers and rivers, developed water system. Mostly along the river at the bottom depression area, to develop industrial and agricultural production and to protect people’s lives and property safety. However, the embankment has poor soil quality. Leaks in some sections of the embankments are experiencing leakage, and the more serious ones are about 100 km in length. Far from mentioning, when the Yangtze River hit a historic flood in 1983, Nanjing