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经过对湖北省西北口水库发电洞渗漏点进行连通试验,分析结果表明:由于对该段回填灌浆时,未将洞壁外山岩和山体空洞封填灌满而导致渗漏。经过比选防漏灌浆处理方案,选用内架施工栈桥,外置灌浆机,用长距离高压灌浆管直接接到洞内漏水点处由内向外灌浆法,施工历时短、速度快、效果好。
Through the connection test of the leakage point of the power generation tunnel in the Northwest of Hubei Province, the analysis results show that the leakage did not fill the cave rocks and the mountainous cavity filling due to the backfilling of this section. After comparing the selection of leak-proof grouting treatment options, the selection of the inner frame construction trestle, external grouting machine, with long-distance high pressure grouting pipe directly received inside the hole leakage by the internal and external grouting method, the construction lasted for a short time, fast, good effect.