【正文】 降的因素分為人為因素和自然因素；控制路基工后沉降的主要途徑、步驟和措施。四、進(jìn)度計(jì)劃第 14 周 開(kāi)題報(bào)告。路基變形最明顯、危害最大的問(wèn)題是路基沉降。 關(guān)鍵字： 黃土 路基工后沉降 控制方式 沉降計(jì)算 監(jiān)測(cè)7 / 59AbstractHighspeed railway represents the railway modernization development trend in the 21st century, is the important achievement of transportation, is the mon wealth of mankind. Along with the rapid development of economy, the transportation demand, China railway PDL surge has entered a rapid development construction period，Due to the high speed railway running speed, the technical standard of roadbed, strict control of subgrade settlement of deformation and has bee the biggest characteristic of PDL roadbed. The most obvious harm, roadbed deformation of the biggest problems is the embankment settlement. Embankment settlement control is one which involves many factors, has large uncertainties of engineering problems.Embankment settlement including sub grade construction settlement and postconstruction settlement, postconstruction settlement risk, particularly serious harm,This paper from the nature and characteristics of loess embankment settlement, the reason and harm, the control measures of embankment settlement and roadbed settlement mechanism, Control of sub grade settlement after the necessity, steps and measures, and the characteristics of measures, embankment settlement calculation, monitoring of embankment settlement.KEY WORDS： sienna embankment settlement control mode settlement calculation detectio1 / 59目 錄第 1 章 緒論 ..........................................................................................................................1 選題背景及意義 ....................................................................................................1 我國(guó)鐵路路基現(xiàn)狀 ....................................................................................................................1 黃土 ........................................................................................................................1 黃土的顆粒組成會(huì)及結(jié)構(gòu) ..........................................................................2 黃土的多孔性 ..............................................................................................2 黃土的濕陷性與變形特性 ..........................................................................3 黃土的結(jié)構(gòu)性問(wèn)題 ......................................................................................4第 2 章 路基沉降 .........................................................................................................................................4 路基沉降 .......................................................................................................................................4 路基沉降的原因 ..........................................................................................4 路基不均勻沉降的影響和危害 ............................................................................6 路基不均勻沉降對(duì)鋪軌施工的影響 ..........................................................6 路基對(duì)稱(chēng)將對(duì)高鐵運(yùn)營(yíng)的危害 ..................................................................6 客運(yùn)專(zhuān)線(xiàn)無(wú)砟軌道路基填筑的壓實(shí)標(biāo)準(zhǔn) .........................................................................6 客運(yùn)專(zhuān)線(xiàn)無(wú)砟軌道路基沉降的控制要求 .........................................................................8．1 沉降控制標(biāo)準(zhǔn) ...............................................................................................................8 .2 客運(yùn)專(zhuān)線(xiàn)無(wú)砟軌道路基的填料要求 .....................................................................8第 3 章 路基沉降的控制及計(jì)算 ..........................................................................................................11 影響路基沉降的因素 ............................................................................................6 影響沉降穩(wěn)定的自然因素 ..........................................................................11 影響沉降穩(wěn)定的人為因素 ..........................................................................11 濕陷性黃土路基處理方法及效果評(píng)價(jià) ................................................................8 試驗(yàn)段工程地基處理方法 ............................................................................8 地基處理效果方法 ........................................................................................8 濕陷性黃土路基的沉降控制措施 ................................................................8 路基工后沉降 ......................................................................................................14 路基工后沉降組成分析 ..............................................................................14 工后沉降控制的重要性與特點(diǎn) ..................................................................152 / 59 控制工后沉降的主要途徑 ..................................................................................15 加強(qiáng)技術(shù)培訓(xùn)及明確控制標(biāo)準(zhǔn) ..................................................................16 重視黃土地質(zhì)核查 ......................................................................................16 工后沉降的控制步驟 ..........................................................................................16 施工前的控制措施 ......................................................................................16 施工過(guò)程中的控制措施 ..............................................................................17 加強(qiáng)路基沉降分析與預(yù)測(cè) ..........................................................................17 做好路基沉降觀(guān)測(cè) ......................................................................................18 地基設(shè)計(jì) ...............................................................................................................18 樁網(wǎng)地基設(shè)計(jì) ..................................................................................................19 CFG 樁樁網(wǎng)復(fù)合地基 ...............................................................................19 灰土樁樁網(wǎng)結(jié)構(gòu) ......................................................................................24 樁板結(jié)構(gòu) ..........................................................................................................26 整體構(gòu)造分析 ..........................................................................................27 結(jié)構(gòu)幾何尺寸優(yōu)化 ..............