【正文】 ............................4 直線地段路基橫斷面設(shè)計(jì) .......................................................................................4 圓曲線地段路基橫斷面設(shè)計(jì) ...................................................................................4 緩和曲線段路基橫斷面設(shè)計(jì) ...................................................................................5第 3 章 客運(yùn)專線軟土地基處理 ....................................................................................6 軟土路基常用的處理方法 ........................................................................................6 袋裝砂井法 ...............................................................................................................6 袋裝砂井的概念 ...............................................................................................6 袋裝砂井的設(shè)計(jì)優(yōu)點(diǎn) .......................................................................................7 袋裝砂井的設(shè)計(jì) ...............................................................................................7 固結(jié)度計(jì)算 .......................................................................................................8 袋裝砂井的施工 ...............................................................................................9 袋裝砂井的施工 ...............................................................................................9 CFG 樁復(fù)合地基法 ..................................................................................................9 概述 ...................................................................................................................9 CFG 樁復(fù)合地基工程特性 ............................................................................10 CFG 樁復(fù)合地基設(shè)計(jì)計(jì)算 ............................................................................11 CFG 樁復(fù)合地基的施工 ..............................................................................13 CFG 樁復(fù)合地基質(zhì)量檢驗(yàn) ............................................................................15 兩種軟基處理方案的技術(shù)比較 ...........................................................................16 工期方面 ...........................................................................................................16 沉降量方面 .......................................................................................................16 造價(jià)方面 .........................................................................................................16 比選結(jié)論與最終方案選擇 ...........................................................................16第 4 章 邊坡穩(wěn)定性檢算 ................................................................................................17 穩(wěn)定影響因素 .........................................................................................................17 條分法原理 .............................................................................................................17 穩(wěn)定檢算 .................................................................................................................18 計(jì)算參數(shù)取值 .................................................................................................18 確定滑弧圓心位置 .........................................................................................18 劃分土條 .........................................................................................................19 穩(wěn)定性計(jì)算 .....................................................................................................19 穩(wěn)定計(jì)算的結(jié)論 .....................................................................................................20第 5 章 軟土地基沉降量計(jì)算 ........................................................................................22 地基沉降概述 .........................................................................................................22 分層總和法簡介 .....................................................................................................22 分層總和法基本原理 .....................................................................................22 分層總和法計(jì)算步驟 .....................................................................................22 未作處理的軟土地基的沉降量計(jì)算 ...................................................................23 地基土分層 .....................................................................................................23 路堤基底附加應(yīng)力計(jì)算 ...............................................................................23 未處理的沉降計(jì)算 .......................................................................................23 活載計(jì)算 .........................................................................................................27 CFG 復(fù)合地基工后沉降計(jì)算 ................................................................................28 工后沉降產(chǎn)生的原因 .............................................................................................30 減少工后沉降的可采取的施工措施 .....................................................................30 超載預(yù)壓 .........................................................................................................30 路堤填料處理 ...................................................................................................30 增加排水路徑 .................................................................................................30 加強(qiáng)基礎(chǔ)的剛度和強(qiáng)度 .................................................................................31 其它注意事項(xiàng) .................................................................................................31第 6 章 基床表層加固和路堤邊坡防護(hù) ........................................................................32 基床表層加固 .......................................................................................................32 基床表層作用 ...............................................................................................32 基床表層加固措施 .........................................................................................32 邊坡防護(hù) .....................................................................................