發(fā)布時(shí)間：2018-07-03 13:36

  本文選題：城市地鐵隧道 + 高速鐵路�。� 參考：《北京交通大學(xué)》2015年碩士論文

【摘要】：隨著我國高速鐵路逐漸形成網(wǎng)絡(luò),今后必然會(huì)出現(xiàn)大量穿越高速鐵路的交通工程,由于高速鐵路的特殊性,新建公路和鐵路與已建或在建高速鐵路交叉跨越時(shí),應(yīng)優(yōu)先選擇公路或鐵路下穿高速鐵路方案。路基沉降是下穿高速鐵路的關(guān)鍵技術(shù)問題,研究隧道下穿高速鐵路路基沉降控制技術(shù)對確保高速鐵路運(yùn)營安全、滿足工程建設(shè)需求具有重要意義和實(shí)用價(jià)值。本文從前人研究的基礎(chǔ)上,從隧道下穿施工引起高速鐵路路基沉降及軌道變形的機(jī)理出發(fā),并根據(jù)國內(nèi)外相關(guān)規(guī)范對高速鐵路路基及軌道變形要求提出隧道下穿高速鐵路路基沉降及軌道變形的控制標(biāo)準(zhǔn),重點(diǎn)分析了穿越工程中不同影響因素對高速鐵路路基沉降及軌道變形的影響規(guī)律,最后根據(jù)基于控制路基及軌道變形的思想提出穿越工程中的穿越可行性指標(biāo),并基于這種控制指標(biāo)體系下對軟土地層條件下不同輔助工法隧道穿越可行性研究。論文主要完成了以下的研究工作： (1)根據(jù)隧道開挖引起地層變形傳遞規(guī)律,分析了地層-路基-軌道板及鐵軌三者之間相互作用關(guān)系,并分析了由于地層變形引起的路基沉降與軌道變形的機(jī)理。 (2)通過查閱國內(nèi)外對高速鐵路路基沉降與軌道變形的相關(guān)規(guī)范,結(jié)合國內(nèi)實(shí)際穿越工程中的控制標(biāo)準(zhǔn),根據(jù)安全性、適應(yīng)性、經(jīng)濟(jì)性等原則提出了穿越工程中高速鐵路路基沉降及軌道變形的控制標(biāo)準(zhǔn)。 (3)根據(jù)城市地鐵隧道穿越高速鐵路的工程特點(diǎn),分析了穿越工程中高速鐵路路基及軌道變形的影響因素,并采用FLAC3D對不同影響因素進(jìn)行數(shù)值模擬,分析了隧道下穿高速鐵路路基與軌道變形的時(shí)空分布規(guī)律。 (4)根據(jù)高速鐵路路基“工后零沉降”控制理論,提出來基于控制高速鐵路路基及軌道變形穿越可行性指標(biāo),并重點(diǎn)分析了軟土地層在采取不同輔助工法條件下穿越可行性分析,為今后隧道下穿高速鐵路工程提供指導(dǎo)。
[Abstract]:With the gradual formation of high-speed railway network in China, there will be a large number of traffic projects crossing the high-speed railway in the future. Because of the particularity of the high-speed railway, when the new highway and railway cross and cross with the existing or under construction high-speed railway, Priority should be given to highway or railway underpass high-speed railway schemes. The subgrade settlement is the key technical problem of the high-speed railway under the tunnel. It is of great significance and practical value to study the subgrade settlement control technology under the tunnel in order to ensure the operation safety of the high-speed railway and meet the needs of the engineering construction. On the basis of previous studies, this paper starts from the mechanism of subgrade settlement and track deformation of high-speed railway caused by tunnel underpass construction. According to the requirements of roadbed and track deformation of high-speed railway at home and abroad, the control standard of subgrade settlement and track deformation under tunnel is put forward. The influence of different factors on the subgrade settlement and track deformation of high-speed railway is analyzed emphatically. Finally, based on the idea of controlling subgrade and track deformation, the feasibility index of crossing is put forward. Based on the control index system, the feasibility of tunnel crossing with different auxiliary engineering methods in soft soil is studied. The main work of this paper is as follows: (1) according to the law of stratum deformation transfer caused by tunnel excavation, the interaction between stratum subgrade track plate and rail is analyzed. The mechanism of subgrade settlement and track deformation caused by ground deformation is also analyzed. (2) through consulting the relevant codes of subgrade settlement and track deformation at home and abroad, combining with the control standards in the domestic actual crossing engineering, the paper analyzes the mechanism of roadbed settlement and track deformation caused by ground deformation. According to the principles of safety, adaptability and economy, the paper puts forward the control standard of subgrade settlement and track deformation of high-speed railway in crossing project. (3) according to the engineering characteristics of urban subway tunnel crossing high-speed railway, The influencing factors of roadbed and track deformation of high-speed railway in crossing engineering are analyzed, and the numerical simulation of different influencing factors is carried out by FLAC3D. The spatial and temporal distribution of subgrade and track deformation under tunnel is analyzed. (4) according to the control theory of "zero settlement after construction" of high-speed railway subgrade, the feasibility index of controlling high-speed railway roadbed and track deformation crossing is put forward. The feasibility analysis of crossing the soft soil stratum under the condition of different auxiliary engineering method is analyzed emphatically, which provides guidance for the tunnel underpass high speed railway project in the future.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U456.3;U213.157

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