人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
22期
72-75
,共4页
帷幕灌浆%灌浆材料%回浆返浓%大岗山水电站
帷幕灌漿%灌漿材料%迴漿返濃%大崗山水電站
유막관장%관장재료%회장반농%대강산수전참
curtain grouting%grouting materials%dense slurry returning%Dagangshan Hydropower Station
在大岗山水电站拱坝940 m高程以下帷幕灌浆施工过程中，出现了严重的回浆返浓现象，孔口涌水较为普遍。针对坝基陡倾节理、裂隙的特点，先后采用普通水泥、细水泥和化学浆液进行了一系列灌浆试验研究，最终确定了一套对特殊地层较为有效的灌浆工艺参数和方法。灌后检测结果表明：普通水泥和细水泥灌浆虽都能提高透水率达标率，但尚不能完全满足设计要求，而化学灌浆处理能全部满足设计要求。
在大崗山水電站拱壩940 m高程以下帷幕灌漿施工過程中，齣現瞭嚴重的迴漿返濃現象，孔口湧水較為普遍。針對壩基陡傾節理、裂隙的特點，先後採用普通水泥、細水泥和化學漿液進行瞭一繫列灌漿試驗研究，最終確定瞭一套對特殊地層較為有效的灌漿工藝參數和方法。灌後檢測結果錶明：普通水泥和細水泥灌漿雖都能提高透水率達標率，但尚不能完全滿足設計要求，而化學灌漿處理能全部滿足設計要求。
재대강산수전참공패940 m고정이하유막관장시공과정중，출현료엄중적회장반농현상，공구용수교위보편。침대패기두경절리、렬극적특점，선후채용보통수니、세수니화화학장액진행료일계렬관장시험연구，최종학정료일투대특수지층교위유효적관장공예삼수화방법。관후검측결과표명：보통수니화세수니관장수도능제고투수솔체표솔，단상불능완전만족설계요구，이화학관장처리능전부만족설계요구。
In the dam curtain grouting under the elevation of 940 m in Dagangshan Hydropower Station, severe dense slurry re-turning occurred, and water gushing was serious generally near the grouting holes. In view of the steep joint and fissures, com-mon cement, fine cement and chemical slurry were respectively used in the grouting process, a series of tests were conducted. Based on the grouting result of common cement and fine cement obtained by the tests, the grouting parameters and technology ef-fective to the special strata were determined. The check result after grouting showed that grouting by common cement and fine ce-ment could improve the up-to-standard rate of permeability, but could not fully meet the design requirement; chemical grou-ting could fully meet the design requirement. By the analysis on grouting parameters and effectiveness in different grouting stages, some experiences and suggestions are obtained, which can be referred by similar projects.
