注浆技术在土（溶）洞处理中的应用

Application of Grouting Technique in Earth （Karst） Cave Processing

白云机场场区土（溶）洞发育，其大小、深度相差悬殊，充填程度不一：对此采用高压灌注低标号混凝土和分段注浆法工艺对土（溶）洞进行地基处理，并根据机场的地质情况，确定了孔距、孔径、孔深、浆液配合比、压力等参数。通过静力触探测试，经注浆技术处理的土（溶）洞，其平均比贯阻力达到2．99MPa.

There are well developed earth （karst） caves in Baiyun Airport area, their sizes and depths are quite different, and degree of filling are not the same. High pressurized grouting of low grade concrete is used in earth （karst） cave foundation treatment, according to air port geological condition to determine parameters of borehole spacing, diameter and depth, slurry proportion, pressure etc. Earth （karst） caves after grouting processing, their average specific penetrating resistance can be 2.99MPa.