【正文】 cavation of , a subway tunnel connecting passage freezing construction technology, made of artificial freezing method in practical engineering applications, conducts a deep understanding of step. Keywords: artificial freezing , frozen , freeze wall , freezing hole 3 目錄 第一章 緒論 .................................................................................................................... 5 選題意義 ............................................................................................................. 5 問題提出 ............................................................................................................. 6 國內(nèi)外研究現(xiàn)狀 ................................................................................................... 8 凍脹融沉機(jī)理及試驗(yàn)研究 ................................................................................... 10 第二章 凍土描述及其性質(zhì) ............................................................................................. 11 凍土 定義 ........................................................................................................... 11 凍土分類 ........................................................................................................... 11 按含冰特征 .............................................................................................. 11 按凍結(jié)狀態(tài)持續(xù)時(shí)間分類 ......................................................................... 11 按活動(dòng)層與下臥層的類別及其關(guān)系分類 .................................................... 12 其他類型的凍土 ....................................................................................... 12 凍土構(gòu)造類別 .................................................................................................... 14 凍土形成過程 .................................................................................................... 15 地下水對(duì)凍土影響 ............................................................................................. 17 土粒與水的相互作用 ................................................................................ 17 水質(zhì)與流速對(duì)巖土凍結(jié)影響 ...................................................................... 18 第三章 人工凍結(jié)法原理及其力學(xué)參數(shù)和特性 ................................................................. 26 人工凍結(jié)法原理 ................................................................................................. 26 制冷技術(shù) .................................................................................................. 26 地下水對(duì)凍結(jié)的影響 ................................................................................ 27 溫度場和凍結(jié)速度 .................................................................................... 27 凍脹和融沉效應(yīng) ....................................................................................... 28 人工凍土的力學(xué)參數(shù) .......................................................................................... 28 凍土強(qiáng)度 ........................................................................................................... 29 單軸抗壓強(qiáng)度 ........................................................................................... 29 單軸抗拉強(qiáng)度 ........................................................................................... 31 抗剪強(qiáng)度 .................................................................................................. 32 凍結(jié)壁的溫度場 ................................................................................................. 34 凍結(jié)壁形成 .............................................................................................. 34 凍結(jié)壁溫度場的影響因素 ......................................................................... 35 人工土凍結(jié)法設(shè)計(jì) ............................................................................................. 37 凍土墻結(jié)構(gòu)設(shè)計(jì) ....................................................................................... 37 設(shè)計(jì)方法 .................................................................................................. 38 第四章 凍結(jié)法鑿井技術(shù) ................................................................................................. 39 凍結(jié)方案選取 .................................................................................................... 39 一次凍全深方案 ....................................................................................... 39 分段凍結(jié)方案 ........................................................................................... 39 差異凍結(jié)方案 ........................................................................................... 39 局部凍結(jié)方案 ........................................................................................... 40 鉆孔布置及鉆孔施工 .......................................................................................... 41 鉆孔布置 .................................................................................................. 41 4 凍結(jié)孔鉆進(jìn) .............................................................................................. 43 磁性單點(diǎn)測(cè)斜儀 ....................................................................................... 43 陀螺測(cè)斜儀 .............................................................................................. 44 凍土體開挖及風(fēng)險(xiǎn)分析 ...................................................................................... 45 凍土體開挖 .............................................................................................. 45 聯(lián)絡(luò)通道凍結(jié)加固暗挖法風(fēng)險(xiǎn)分析 ........................................................... 47 第五章 某地鐵隧道聯(lián)絡(luò)通道凍結(jié)法施工 ........................................................................ 48 工程概況 ........................................................................................................... 48 凍結(jié)法的設(shè)計(jì)及施工 .......................................................................................... 49 凍結(jié)孔布置設(shè)計(jì) ....................................................................................... 49 凍結(jié)系統(tǒng)設(shè)計(jì)及技術(shù)指標(biāo) ......................................................................... 50 凍脹、融沉及隧