西北水电
西北水電
서북수전
NORTHWEST WATER POWER
2013年
6期
109-112
,共4页
接缝灌浆%横缝%压缝%湿磨水泥%小湾水电站
接縫灌漿%橫縫%壓縫%濕磨水泥%小灣水電站
접봉관장%횡봉%압봉%습마수니%소만수전참
joint grouting%transverse joint%pressed joint%wetgrinding cement%Xiaowan Hydropower Project
小湾水电站拱坝横缝接缝灌浆施工通过灌浆性能试验，确定采用既能满足强度要求，又具有较好流动性的0．45∶1低水灰比浆液，且实现大部分灌区采用0．45∶1单一水灰比浆液灌注；对于特殊灌区通过采取“混凝土超冷、降低上游水位、湿磨水泥浆液灌注、提高灌浆压力、补打进浆、排气孔及采用化学浆液灌注”等多种措施，有效地解决了横缝压紧和多层多灌区串漏等复杂条件下灌浆施工，并取得较好灌浆效果。
小灣水電站拱壩橫縫接縫灌漿施工通過灌漿性能試驗，確定採用既能滿足彊度要求，又具有較好流動性的0．45∶1低水灰比漿液，且實現大部分灌區採用0．45∶1單一水灰比漿液灌註；對于特殊灌區通過採取“混凝土超冷、降低上遊水位、濕磨水泥漿液灌註、提高灌漿壓力、補打進漿、排氣孔及採用化學漿液灌註”等多種措施，有效地解決瞭橫縫壓緊和多層多灌區串漏等複雜條件下灌漿施工，併取得較好灌漿效果。
소만수전참공패횡봉접봉관장시공통과관장성능시험，학정채용기능만족강도요구，우구유교호류동성적0．45∶1저수회비장액，차실현대부분관구채용0．45∶1단일수회비장액관주；대우특수관구통과채취“혼응토초랭、강저상유수위、습마수니장액관주、제고관장압력、보타진장、배기공급채용화학장액관주”등다충조시，유효지해결료횡봉압긴화다층다관구천루등복잡조건하관장시공，병취득교호관장효과。
To perform the joint grouting of transverse joints of the arch dam of Xiaowan Hydropower Project, the grouting performance test is carried out.The low water-cement ratio (0.45∶1), which can satisfy strength requirement and is with better fluidity as well, is ap-plied.Furthermore, most of the grouting areas apply the same and single water-cement ratio for the grouting operation.Concerning the special grouting area, special measures such as application of extremely cooled concrete, lowing of upstream water level, application of wetgrinding cement grout, increase of grouting pressure, additional grout injection, air hole and application of chemical grout effectively and successfully perform grouting operation under such complicated conditions as the closed-pressed transverse and the grout connection and leakage in multiple grouting layers and grouting areas, an excepted grouting result is achieved.
