●段家峡二级水电站厂房基础建于砂卵石层上,施工难度大,造成数处渗水、漏水,具有典型性。 ●聚氨酯防水材料TP—YT—928及TT—YT—928为缺少羟基的聚氨酯预聚体,其工作原理为灌入缝隙后,与水化合生成氨基化合物,体积并随之膨胀,达到防渗堵漏的目的。 ●实践证明,采用聚氨酯防水材料防渗堵漏效果甚佳,堵漏彻底可靠。 ● The foundation of Duanjiaxia II Hydropower Station is built on sand and gravel layer, which is difficult to construct and causes several seepage and water leakage, which is typical. ● TP-YT-928 and TT-YT-928 polyurethane waterproofing materials are hydroxyl-deficient polyurethane prepolymers. The working principle of the TP-YT-928 and TT-YT-928 is to compound amino compounds with hydration after swelling into the gaps. The purpose of leakage. ● Practice has proved that the use of polyurethane waterproof material impermeable plugging effect is very good, plugging completely reliable.