【摘要】：近年來全國各地軌道交通建設(shè)如火如荼,地鐵隧道盾構(gòu)法施工亦日趨成熟。由于地鐵建設(shè)的自身特點(diǎn)決定了地鐵隧道線路通常布設(shè)在城市既有主要道路下方,且隧道周邊緊鄰眾多既有建構(gòu)筑物。盾構(gòu)掘進(jìn)施工極易引起鄰近建筑物不均勻沉降及傾斜,危害極大,輕者引起房屋破損,重者將危及人民生命財產(chǎn)安全。因此對盾構(gòu)施工下穿建筑物的工況模擬分析及施工參數(shù)研究,對完善盾構(gòu)法施工工藝和重大風(fēng)險防控具有重要的意義。本文主要依托于南昌軌道交通2號線7標(biāo)洪~辛盾構(gòu)區(qū)間的工程實(shí)例,研究分析了如何控制地鐵隧道盾構(gòu)法施工下穿建筑物的沉降及傾斜問題。主要著眼點(diǎn)在于盾構(gòu)掘進(jìn)參數(shù)的設(shè)計和隧道鄰近建筑物預(yù)加固措施的設(shè)計及施工,并通過實(shí)施驗證,該工程所采取的措施是有效的。本文首先對隧道鄰近建筑物的結(jié)構(gòu)類型、基礎(chǔ)形式、與隧道的關(guān)系等信息進(jìn)行了詳細(xì)的排查梳理。以建筑物結(jié)構(gòu)安全鑒定為基礎(chǔ),運(yùn)用數(shù)值模擬分析的方法對盾構(gòu)下穿建筑物施工風(fēng)險進(jìn)行評估,得出未加固狀態(tài)下隧道施工所引起的建筑物沉降及傾斜數(shù)值,并以此進(jìn)行風(fēng)險定級,根據(jù)風(fēng)險級別確定了需要采取預(yù)加固措施的建筑物范圍。然后,根據(jù)需要采取預(yù)加固措施的建筑物的結(jié)構(gòu)形式、基礎(chǔ)形式、與隧道關(guān)系的特點(diǎn),通過數(shù)值模擬盾構(gòu)下穿建筑物的過程,對比分析盾構(gòu)掘進(jìn)過程中建筑物在加固前后兩種狀態(tài)下的沉降與傾斜數(shù)據(jù),判斷所設(shè)計的預(yù)加固措施對建筑物沉降控制的效果,以確定每一座建筑物的最佳預(yù)加固方案。其次,本文對難度較大的靜壓注漿加固施工進(jìn)行了現(xiàn)場試驗研究,解決了大角度斜孔深層靜壓注漿的難題,為預(yù)加固方案的實(shí)施提供技術(shù)保障。再次,文中敘述了在富水砂層盾構(gòu)掘進(jìn)施工中,針對穿越不同風(fēng)險等級的建筑物分別設(shè)計了不同的盾構(gòu)掘進(jìn)參數(shù),并以監(jiān)測數(shù)據(jù)為導(dǎo)向進(jìn)行動態(tài)調(diào)整,以達(dá)到最佳的沉降控制效果。最后,將施工全過程的監(jiān)測結(jié)果與數(shù)值模擬分析的數(shù)據(jù)進(jìn)行比較,達(dá)到了沉降控制的既定目標(biāo),驗證了對建筑物的預(yù)加固措施以及盾構(gòu)掘進(jìn)參數(shù)的設(shè)計是合理、有效的。
[Abstract]:In recent years, the construction of rail transit is in full swing all over the country, and the shield construction of subway tunnel is also maturing day by day. Due to the characteristics of subway construction, subway tunnel lines are usually located under the main urban roads, and the surrounding of the tunnel is adjacent to many existing structures. Shield tunneling is very easy to cause uneven settlement and inclination of adjacent buildings, which will cause great harm, which will cause damage to buildings and endanger the safety of people's lives and property. Therefore, it is of great significance to simulate and analyze the operating conditions and the construction parameters of the building under shield construction, which is of great significance to the improvement of shield construction technology and the prevention and control of major risks. This paper mainly relies on the engineering example of 7 mark flood and Xin shield section of Nanchang Rail Transit Line 2, and studies and analyzes how to control the settlement and inclination of the building under the shield tunneling construction of subway tunnel. The main focus is on the design of shield tunneling parameters and the design and construction of pre-reinforcement measures for the adjacent buildings in the tunnel. In this paper, the structure type, foundation form and the relationship between the tunnel and the adjacent building are analyzed in detail. On the basis of structural safety assessment of buildings, the risk of construction under shield tunneling is evaluated by numerical simulation analysis method, and the settlement and inclination of buildings caused by tunnel construction in unreinforced condition are obtained. According to the risk level, the scope of buildings that need to take pre-reinforcement measures is determined. Then, according to the structural form, foundation form, and the relationship between the structure and the tunnel, the process of passing through the building under shield is simulated numerically. By comparing and analyzing the settlement and tilt data of buildings in the course of shield tunneling before and after reinforcement, the effect of the designed pre-reinforcement measures on the settlement control of buildings is judged to determine the best pre-reinforcement scheme for each building. Secondly, this paper has carried on the field test research to the difficult static pressure grouting reinforcement construction, solved the difficult problem of the deep static pressure grouting of the large angle inclined hole, and provided the technical guarantee for the implementation of the pre-reinforcement scheme. Thirdly, in the construction of water-rich sand shield tunneling, different shield tunneling parameters are designed for the buildings with different risk levels, and the dynamic adjustment is carried out under the guidance of monitoring data. In order to achieve the best settlement control effect. Finally, by comparing the monitoring results of the whole construction process with the data of numerical simulation analysis, the established goal of settlement control is achieved, and the design of pre-reinforcement measures for buildings and the design of shield tunneling parameters are verified to be reasonable and effective.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U455.43;TU196.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 漆泰岳;白永學(xué);李斌;;復(fù)雜斷面地鐵隧道開挖優(yōu)化及對建筑物的影響[J];西南交通大學(xué)學(xué)報;2012年01期

2 姚燕明;羅仕恒;王世君;;盾構(gòu)施工與鄰近建筑的相互影響分析[J];地下空間與工程學(xué)報;2011年S2期

3 肖瀟;張孟喜;吳惠明;張治國;;多線疊交盾構(gòu)施工引起土體變形數(shù)值模擬分析[J];地下空間與工程學(xué)報;2011年05期

4 余劍英;魏綱;;地下隧道施工對鄰近建筑物影響的研究現(xiàn)狀[J];工業(yè)建筑;2011年09期

5 李博;蘇華友;趙旭偉;;成都地鐵盾構(gòu)隧道地表沉降分析[J];城市軌道交通研究;2010年04期

6 賀美德;劉軍;樂貴平;王夢恕;張頂立;;盾構(gòu)隧道近距離側(cè)穿高層建筑的影響研究[J];巖石力學(xué)與工程學(xué)報;2010年03期

7 Assaf KLAR;Itai ELKAYAM;;Direct and relaxation methods for soil-structure interaction due to tunneling[J];Journal of Zhejiang University Science A(An International Applied Physics & Engineering Journal);2010年01期

8 吳賢國;陳躍慶;丁烈云;王瑞;劉惠濤;;長江隧道盾構(gòu)施工對建筑物的影響及其保護(hù)研究[J];鐵道工程學(xué)報;2008年07期

9 孫統(tǒng)立;張慶賀;胡向東;韋良文;;雙圓盾構(gòu)施工土體沉降有限元數(shù)值模擬[J];同濟(jì)大學(xué)學(xué)報(自然科學(xué)版);2008年04期

10 衡朝陽;滕延京;陳希泉;;地鐵盾構(gòu)隧道周邊建筑物地基基礎(chǔ)變形控制研究[J];地下空間與工程學(xué)報;2006年S2期

，

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