本文選題：大直徑盾構(gòu) + 穿越��； 參考：《北京交通大學(xué)》2014年碩士論文

【摘要】：地鐵作為城市內(nèi)交通系統(tǒng)的主要力量,承擔(dān)了城市大部分的交通客流,其運營安全與否直接關(guān)系到乘客的生命安全。為滿足城市軌道交通網(wǎng)絡(luò)化的需求,地鐵線路網(wǎng)絡(luò)格局越加復(fù)雜,各類型的穿越施工頻繁出現(xiàn),由于其存在的工程風(fēng)險和對既有結(jié)構(gòu)造成的影響,日漸成為交通工程中關(guān)注的重要環(huán)節(jié)。 盾構(gòu)法具有較好的智能性、施工安全性、防滲漏水性,對周圍環(huán)境影響小、易于控制沉降的優(yōu)點,口前已成為國內(nèi)外地鐵隧道工程建設(shè)的主流施工方法,但作為其中一個難點：對于大直徑盾構(gòu)隧道穿越地鐵橋梁結(jié)構(gòu)在北京市尚屬首次,其規(guī)律研究甚少,在新建大盾構(gòu)隧道工程的施工中,除自身結(jié)構(gòu)安全外,重點目標(biāo)就是保證其施工對既有橋梁的影響程度降到最低。因此,如何對大直徑盾構(gòu)穿越地鐵橋梁工程進行風(fēng)險評估和準(zhǔn)確的分析盾構(gòu)隧道施工對既有橋梁結(jié)構(gòu)及軌道的變形規(guī)律,提出合理的保護措施并分析其效果,繼而指導(dǎo)工程施工,保證既有地鐵的結(jié)構(gòu)和運營安全,在今后類似的大直徑盾構(gòu)穿越工程中顯得尤為重要。 本文以北京地鐵大直徑盾構(gòu)隧道穿越工程為研究對象,另一個難點在于既有地鐵線路變形控制標(biāo)準(zhǔn)高。綜合以上兩個難點對既有地鐵橋梁結(jié)構(gòu)及軌道所受的變形進行分析和總結(jié),提出合理的保護措施體系,為以后大盾構(gòu)隧道穿越橋梁施工的工程提供借鑒和參考。本文的主要研究工作： (1)在廣泛地研究國內(nèi)外相關(guān)文獻的基礎(chǔ)上,探討盾構(gòu)隧道下穿工程的變形機理。根據(jù)實際工程,采用數(shù)值模擬的方法,運用有限元軟件ANSYS分析大直徑盾構(gòu)隧道的施工對既有地鐵橋梁和軌道結(jié)構(gòu)的變形影響；對比三種不同工況：未加固條件下、施作鉆孔灌注樁方案和施作復(fù)合錨桿樁方案對既有地鐵橋梁和軌道結(jié)構(gòu)的影響,并總結(jié)最佳方案。 (2)根據(jù)實際工程的第三方監(jiān)測數(shù)據(jù),對數(shù)值模擬的結(jié)果進行檢驗,分析數(shù)值模擬方法的正確性及可能存在的問題,并總結(jié)既有橋梁結(jié)構(gòu)和軌道結(jié)構(gòu)的變形規(guī)律,提出大直徑盾構(gòu)穿越工程施工的風(fēng)險處理措施,為以后類似的大直徑盾構(gòu)穿越橋梁工程的施工提供借鑒和參考。
[Abstract]:As the main force of the urban transportation system, the subway undertakes most of the passenger flow in the city, and its operation safety or not is directly related to the safety of the passengers. In order to meet the needs of urban rail transit network, the network pattern of subway lines is more and more complicated, and various types of traversing construction occur frequently, because of the engineering risks and the influence on the existing structures. The shield method has the advantages of better intelligence, construction safety, anti-seepage water, less influence on the surrounding environment, and easy to control the settlement. It has become the mainstream construction method of subway tunnel construction at home and abroad, but as one of the difficulties: it is the first time for large diameter shield tunneling to cross subway bridge structure in Beijing, and the research on its law is very few. In the construction of new large shield tunneling project, the key goal is to ensure that the influence of the construction on the existing bridges is minimized, except for the safety of its own structure. Therefore, how to evaluate the risk of large diameter shield tunneling through subway bridge engineering and analyze the deformation law of existing bridge structure and track in shield tunnel construction, put forward reasonable protection measures and analyze its effect. Then guide the construction to ensure the safety of the existing subway structure and operation, which is especially important in the similar large-diameter shield tunneling project in the future. This paper takes the Beijing Metro large-diameter shield tunnel crossing project as the research object. Another difficulty is that the existing subway line deformation control standards are high. Based on the above two difficulties, the deformation of the existing subway bridge structure and track is analyzed and summarized, and a reasonable protective measure system is put forward, which can be used for reference and reference for the construction of large shield tunneling through bridge in the future. The main research work of this paper is as follows: 1) on the basis of extensive research on relevant literature at home and abroad, the deformation mechanism of shield tunneling underpass engineering is discussed. According to the actual engineering, the finite element software ANSYS is used to analyze the deformation effect of the large diameter shield tunnel construction on the existing subway bridge and track structure by using the numerical simulation method, and three different working conditions are compared: under the condition of no reinforcement, The effects of bored cast-in-place pile scheme and composite anchor pile scheme on the existing subway bridge and track structure are summarized and the best scheme is summarized. The results of numerical simulation are tested according to the third party monitoring data of actual engineering. This paper analyzes the correctness of numerical simulation method and the possible problems, summarizes the deformation law of existing bridge structure and track structure, and puts forward the risk treatment measures for large-diameter shield tunneling construction. It provides reference and reference for similar large diameter shield tunneling bridge construction 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】：2014
【分類號】：U455.43;U448.13

【參考文獻】

相關(guān)期刊論文 前10條

1 彭坤;陶連金;高玉春;王楓;黃俊;;盾構(gòu)隧道下穿橋梁引起樁基變位的數(shù)值分析[J];地下空間與工程學(xué)報;2012年03期

2 黃新民;;盾構(gòu)隧道下穿既有橋樁工程的保護方案研究[J];地下空間與工程學(xué)報;2012年03期

3 黎春林;繆林昌;;盾構(gòu)施工滲流場有限元模擬及其對臨近土層的影響分析[J];東南大學(xué)學(xué)報(自然科學(xué)版);2010年05期

4 白廷輝,尤旭東,李文勇;盾構(gòu)超近距離穿越地鐵運營隧道的保護技術(shù)[J];地下工程與隧道;2000年03期

5 徐前衛(wèi);張燕霞;馬險峰;馬忠政;;托換及除樁技術(shù)在盾構(gòu)穿越橋梁樁基工程中的應(yīng)用[J];建筑技術(shù);2010年03期

6 林寶龍;賈曉云;;盾構(gòu)近距離穿越橋梁及河流的施工效應(yīng)分析[J];路基工程;2010年05期

7 楊成龍;;淺覆土工況下大直徑盾構(gòu)穿越運河橋的施工技術(shù)[J];建筑施工;2013年06期

8 鄭騏;;盾構(gòu)隧道下穿既有橋梁施工技術(shù)[J];市政技術(shù);2008年04期

9 許世偉;楊慧林;;盾構(gòu)隧道施工對臨近市政橋梁影響的數(shù)值分析[J];鐵道標(biāo)準(zhǔn)設(shè)計;2009年10期

10 曹全;彭華;姚建石;;地鐵盾構(gòu)下穿對既有鐵路變形的影響[J];鐵道建筑;2012年03期

相關(guān)博士學(xué)位論文 前2條

1 周松;大型泥水盾構(gòu)近距離穿越運營地鐵的擾動位移特性及施工風(fēng)險研究[D];上海交通大學(xué);2009年

2 楊廣武;地下工程穿越既有地鐵線路變形控制標(biāo)準(zhǔn)和技術(shù)研究[D];北京交通大學(xué);2010年

，

本文編號：2001332