椒溪河勘探试验洞周边帷幕注浆止水施工技术

Technology on Water- sealing Construction for Curtain Grouting around Exploration Adit

引汉济渭椒溪河勘探试验洞开挖爆破至k2+693 m时突然出现大量涌水,掌子面拱顶部位突涌水呈喷射状,隧洞迅速被淹。为了保证开挖顺利进行,采用径向周边帷幕注浆阻止涌水流入洞内,最终实现洞室正常开挖,取得了很好的止水效果。

When the exploration adit in the Jiaoxi River, water diversion project from the Hang River to the Wei River, was excavated at k2＋693 m, water in a large quantity abruptly occurred. Water from the crown at the work face blowouts. The adit was flooded rapidly. To secure the smooth excavation operation, the curtain grouting in peripheral was carried out. Finally, the adit was excavated and the water-sealing effect was expected.