河床覆盖层高压旋喷灌浆效果检测

DETECTION OF EFFECT OF HIGH-PRESSURE ROTARY SHOTCRETING GROUTING ON RIVER BED COVER

随着灌浆技术的提高,运用灌浆来处理软弱基础得到充分利用。在水电工程中,黏土覆盖层基础用灌浆方案处理还很少见,采用何种有效灌浆方法仍在探索中。通过水电工程实例,详细介绍河床覆盖层高压旋喷灌浆处理后,运用钻孔取岩芯、压水试验、载荷试验、声波测试等一系列检测方法和手段,取得相关技术指标,综合评价河床覆盖层灌浆效果,论证河床覆盖层经高压旋喷灌浆处理后不满足重要建筑物基础设计要求,该复合地基不能用作重要建筑物的基础。

With the development of grouting technique, it is widely used to treat soft soil. But in water conservancy and hydroelectric engineering, it is still very little to treat clay foundation with grouting. Through an engineering case, a series of detection methods, such as rock coring, high pressure water and loading test, and sonic test, ect., are described in detail. At the end, it is pointed out that the river bed cover treated with grouting can＇t be used as composite foundation.