高速公路岩盐路堤填筑技术及病害防治技术研究

Research on Filling Technology and Disease Prevention Technology for Rock Salt Embankment of Expressway

通过地质勘察、物理和力学试验以及微结构扫描,研究了察尔汗盐湖区岩盐的工程特性。结果表明,察尔汗盐湖区岩盐层较厚,岩盐含盐量较高,具有溶解度大、溶解速度快和易溶软化等特点;天然岩盐的微观结构密实,极限抗压强度高;在循环荷载作用下,岩盐不发生软化,残余应变较小,证明了岩盐是一种合适的路堤填料。结合察尔汗～格尔木高速公路新建工程,铺筑岩盐路堤试验路,提出了岩盐路堤填筑技术以及路堤病害防治技术。

The engineering properties of rock salt in the Qarham salt lake region are studied by the geotechnical investigation, physical and mechanical tests and microstructural scanning. The results show that the rock salt had many characteristics such as thicker layer, higher salt content, larger solubility, quicker leaching rate and easier dissolveing softening; natural rock salt close-grained mierostructure and high limit compressive strength; rock salt did not soften and had smaller residual strain, which proves that rock salt was a suitable embankment packing in cyclic loading. Filling technology and disease prevention techniques of rock salt embankment are raised by combining new construction of the Qarham-Golmud Expressway and paving test road of rock salt embankment.