【正文】 鐵道工程技術(shù)專業(yè)畢業(yè)設(shè)計 題 目 ： 高速鐵路 路基沉降分析及控制 學(xué) 校： 專 業(yè) ： 學(xué) 號 ： 姓 名 ： 指導(dǎo)教師 ： 日 期 : 摘 要 高速鐵路代表了世界鐵路現(xiàn)代化發(fā)展的大趨勢，是 21世紀(jì)交通運輸?shù)闹卮蟪晒?，是人類的共同財富?隨著經(jīng)濟(jì)的迅猛發(fā)展，交通運輸需求激增 ， 我國鐵路客運專線建設(shè)已經(jīng)進(jìn)入一個高速發(fā)展的時期，由于高速鐵路運行速度快、技術(shù)標(biāo)準(zhǔn)高、對路基的要求嚴(yán)格， 控制路基變形沉降已經(jīng)成為客運專線路基的最大特點。路基變形最明顯、危害最大的問題是 路基沉降。路基沉降控制是一個涉及因素較多、具有較大不確定性的工程難題。 路基沉降包括路基施工沉降和工后沉降，工后沉降尤其發(fā)生幾率大、危害嚴(yán)重。本論文從黃土的性質(zhì)和特性，路基沉降的原因、危害，控制路基沉降的措施、路基工后沉降的機(jī)理，控制路基工后沉降的必要性、步驟 、措施 、各種措施的特點，路基沉降計算、監(jiān)測等方面分析了路基沉降。 關(guān)鍵字： 黃土 路基工后沉降 控制方式 沉降計算 監(jiān)測 Abstract Highspeed 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 detectio 目 錄 第 1 章 緒論 ......................................................................................................................... 1 選題背景及意義 .................................................................................................... 1 我國 鐵路 路基 現(xiàn)狀 .........................................................................................................................1 黃土 ........................................................................................................................ 1 黃土的顆粒組成會及結(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 路基不均勻沉降對鋪軌施工的影響 .......................................................... 6 路基對稱將對高鐵運營的危害 .................................................................. 6 客運專線無砟軌道路基填筑的壓實標(biāo)準(zhǔn) ............................................................................6 客運專線無砟軌道 路基沉降的控制要求 ............................................................................8 ． 1 沉降控制標(biāo)準(zhǔn) ....................................................................................................................8 .2 客運專線無砟軌道路基的 填料 要求 ........................................................................8 第 3 章 路基沉降的控制 及計算 ...............................................................................................................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價 ................................................................ 8 試驗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 ................................................................. 15 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 施工過程中的控制措施 ............................................................................. 17 加強(qiáng)路基沉降分析與預(yù)測 ......................................................................... 17 做好路基沉降觀測 ..................................................................................... 18 地基設(shè)計 .............................................................................