注浆技术在洛湛铁路岩溶路基施工中的应用

洛湛铁路D1K41 300～845．85段路基上部土层松散，下部岩体(石灰岩)溶洞发育，根据工程地质水文地质情况，确定注浆参数和注浆方式，在土体和岩体中通过不同的浆液注浆，固结、充填松散的土层和岩体中的溶蚀、溶洞、溶槽等，使之形成完整的固结体，从而加强岩溶路基的承载力，确保铁路正常运营。介绍了注浆施工工艺及注浆效果。

Application of Cement Injection Techniques in Dissoluble Rock Foundation under Railroad Luozhan

Some sections on Luozhan Railroad are loose soil in up part and karst caves in down part of the foundation. The cement injection way and parameters were determined according to the hydrogeological and engineering geological conditions. The different injection methods were used in soil and rock body to consolidate and to fill the loose soil and the corrosion pockets, karst caves and corrosion grooves in the rock body, so that they can form one integrated consolidation body. The bearing capacity of rock dissolution foundation was strengthened. Therefore the normal run of railway is ensured. The cement injection techniques and its results were introduced.