【正文】 ...7 抽水試驗數(shù)據(jù)觀測要求： .............................................................................................................................76 試驗數(shù)據(jù)成果匯總 ........................................................................87 水文地質(zhì)參數(shù)計算及整理分析 .............................................................10 滲透系數(shù) k 值計算 ........................................................................................................................................10 影響半徑 R 計算： ........................................................................................................................................12 水文地質(zhì)參數(shù)成果 .......................................................................................................................................12第二章 基坑深井降水設(shè)計方案 ................................................................................................................................131 降水深度 ...............................................................................132 含水層水文地質(zhì)參數(shù)確定 .................................................................133 基坑總涌水量 ...........................................................................134 干擾井單井出水量 .......................................................................145 總井?dāng)?shù) .................................................................................146 降水井布置 .............................................................................157 降水井結(jié)構(gòu) .............................................................................158 水泵選型 ...............................................................................159 降水供電設(shè)計 ...........................................................................1510 降水運(yùn)行工期安排 ......................................................................1611 深井降水工程量 ........................................................................1712 意見與建議 ............................................................................17第三章 深井降水施工方案 ........................................................................................................................................181 施工方案 ...............................................................................182 施工順序及工期安排 .....................................................................183 降水井成井施工 .........................................................................18 施工工藝流程 ...............................................................................................................................................18 施工方法 .......................................................................................................................................................184 排水施工 ...............................................................................205 供電設(shè)施 ...............................................................................20 變壓器 ...........................................................................................................................................................20 備用電源 .......................................................................................................................................................20 電纜敷設(shè) ........................................................................................................................................................206 降水井運(yùn)行及管理 .......................................................................20 水位和水量控制 ...........................................................................................................................................20 井管保護(hù) .......................................................................................................................................................20 降水運(yùn)行保障措施 .................................................................................................................