基于CT技术的砾石土浸润试验研究

Gravel Soil Infiltration Study Based on CT Technology

砾石土浸润峰位置对土石坝设计和安全运行有重要作用,但以前的技术手段不能进行试验验证。CT技术作为目前最先进的无损探测技术,在岩土力学试验中具有得天独厚的优势。将CT技术应用到砾石土浸润试验方面,得到的CT图片清晰可靠,可以准确地得到浸润峰的位置,因此是一种行之有效的方法。从CT浸润图片可以看出,浸润线分层比较明显,同时出现阶梯状浸润峰,这是毛细作用在浸润峰的发展过程中引起的现象。

The position of gravel soil infiltration peaks plays an important role to the design and safe operation of dam,but it can not be experimentally verified by the previous techniques.CT technology,as the most advanced non-destructive detection technology,has a unique advantage in the rock mechanics experiments.CT technology was applied to the gravel soil infiltration tests,the obtained CT images are clear and reliable.It can accurately indicate the position of infiltration peak,therefore,it＇s an effective approach.From the CT infiltration images we can see the more obvious stratification line,meanwhile peak appears ladder-like,which is the phenomenon caused by capillarity in the development process of the infiltration peak invasion.