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贮灰坝的坝体土料为湿陷性黄土,70％～80％均为粉土,由于施工质量较差,干容重的合格率仅为41.4％,为此需用劈裂灌浆加固。灌浆孔呈梅花形布置,坝顶布11排孔,排孔距5×3m,用粘粒含量15％～25％的土料制浆,其容重1.3～1.5t/m~3。灌浆孔口压力一般为0.4Mpa,间歇复灌不少于6次,相邻孔或几排孔同时灌注,单孔最大吃浆量为62m~3。灌后的坝体稳定安全系数为1.8,渗透系数较灌前降低了10倍,满足了设计要求。目前水库已蓄灰10～15m(坝高20m),坝后无渗水洇湿现象。
The dam body of the ash storage dam is collapsible loess, 70% -80% of which are silt. Due to poor construction quality, the passing rate of dry bulk weight is only 41.4%. Therefore, split grouting reinforcement is required. The grouting holes are arranged in a plum pattern with 11 rows of holes on the top of the crest and 5 × 3m of holes in the row. The pulp is pulped with soil with a clay content of 15% -25% and has a bulk density of 1.3-1.5 t / m 3. Grouting orifice pressure is generally 0.4Mpa, intermittent reperfusion of not less than 6 times, adjacent holes or rows of holes at the same time perfusion, the maximum amount of single hole to eat pulp 62m ~ 3. After the irrigation, the stability safety factor of the dam is 1.8 and the permeability coefficient is reduced by 10 times compared with that before irrigation, which meets the design requirements. The reservoir has been accumulated ash 10 ~ 15m (dam height 20m), dam no seepage water wet phenomenon.