【正文】 ...................1 我國(guó)新建客運(yùn)專(zhuān)線路基對(duì)軟土地基的要求 ............................................................2 課題研究的主要內(nèi)容 ................................................................................................2第 2 章 客運(yùn)專(zhuān)線路基橫斷面設(shè)計(jì) ..................................................................................3 路堤橫斷面設(shè)計(jì) ........................................................................................................3 斷面設(shè)計(jì)原始資料 ...........................................................................................3 路肩寬度設(shè)定 .....................................................................................................3 邊坡坡率 ...........................................................................................................3 填料選擇 ...........................................................................................................3 線間距 ...............................................................................................................3 路基面寬度確定 ...............................................................................................4 排水溝設(shè)計(jì) .......................................................................................................4 基床厚度 ...........................................................................................................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(zhuān)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(jiǎn)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 ...................................