人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
24期
66-69,72
,共5页
纵向围堰%地基处理%渗控设计%枕头坝一级水电站
縱嚮圍堰%地基處理%滲控設計%枕頭壩一級水電站
종향위언%지기처리%삼공설계%침두패일급수전참
longitudinal cofferdam%foundation treatment%seepage control design%Zhentouba I Hydropower Station
枕头坝一级电站纵向子围堰地基由漂石和砂卵砾石覆盖层组成，且覆盖层下部夹有粉砂层和细砂层，为解决纵向围堰防渗问题，开展了高喷和控制性灌浆试验研究。根据试验成果，提出了对子围堰采用混凝土防渗墙为主、部分覆盖层深度少于40m地段采用双排控制性水泥灌浆防渗的渗控设计方案，以及对防渗墙泥浆固壁、基岩鉴定、终孔成槽验收、浇筑等重点工序的控制要求。渗控试验成果可为类似工程提供参考。
枕頭壩一級電站縱嚮子圍堰地基由漂石和砂卵礫石覆蓋層組成，且覆蓋層下部夾有粉砂層和細砂層，為解決縱嚮圍堰防滲問題，開展瞭高噴和控製性灌漿試驗研究。根據試驗成果，提齣瞭對子圍堰採用混凝土防滲牆為主、部分覆蓋層深度少于40m地段採用雙排控製性水泥灌漿防滲的滲控設計方案，以及對防滲牆泥漿固壁、基巖鑒定、終孔成槽驗收、澆築等重點工序的控製要求。滲控試驗成果可為類似工程提供參攷。
침두패일급전참종향자위언지기유표석화사란력석복개층조성，차복개층하부협유분사층화세사층，위해결종향위언방삼문제，개전료고분화공제성관장시험연구。근거시험성과，제출료대자위언채용혼응토방삼장위주、부분복개층심도소우40m지단채용쌍배공제성수니관장방삼적삼공설계방안，이급대방삼장니장고벽、기암감정、종공성조험수、요축등중점공서적공제요구。삼공시험성과가위유사공정제공삼고。
The foundation of longitudinal sub-cofferdam at Zhentouba I Hydropower Station is consisted of boulder and gravel with partial silt and fine sand laid beneath. High pressure jet grouting and controlling grouting test were carried out to solve the seepage problem. According to the test results, a comprehensive seepage control solution was proposed, which used concrete cut-ting wall as main seepage structures supplemented by double-row controlled cement grouting at local sections with overburden layer thinner than 40 m. Moreover, several quality controlling points were presented, including slurry protection for cutoff wall, classification of rock quality, quality acceptance of trough forming and concrete placement.
