本文關(guān)鍵詞： 基坑開挖 既有隧道 變形特征 有限元分析 影響范圍　出處：《西安科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國(guó)家經(jīng)濟(jì)的快速發(fā)展,地下管線、線路以及構(gòu)筑物的增多,基坑開挖臨近既有運(yùn)營(yíng)隧道的現(xiàn)象逐漸成為常態(tài)化,基坑工程施工使得周邊土體發(fā)生變形,結(jié)構(gòu)形式的不同以及兩者之間距離的變化都會(huì)在不同程度上影響相鄰隧道的穩(wěn)定性,既有地鐵隧道周邊土體附加應(yīng)力逐漸升高,使其產(chǎn)生不同程度的位偏移。隧道結(jié)構(gòu)穩(wěn)定性的破壞可能會(huì)對(duì)公共財(cái)產(chǎn)安全造成重大損失。是以對(duì)于基坑開挖影響既有隧道的情況應(yīng)加以研究,制定合理安全的控制措施。文章通過有限元數(shù)值模擬軟件MIDAS/GTS建立數(shù)據(jù)模型,基于臨近鄭州既有地鐵地上工程的基坑開挖及其監(jiān)測(cè)數(shù)據(jù),模擬了基坑開挖在不同深度及不同水平位置對(duì)臨近結(jié)構(gòu)的影響,同時(shí)提出了相應(yīng)的控制以及保護(hù)措施。參考國(guó)內(nèi)及海外學(xué)者的學(xué)術(shù)成果,分析了不同條件下基坑工程施工所產(chǎn)生的影響及臨近結(jié)構(gòu)的變形特性。將兩者之間的不同位置關(guān)系、控制土體變形的方案、工程施工順序、排水措施等進(jìn)行歸納分類�；卩嵵莸罔F相鄰建筑施工工程,利用有限元數(shù)值模擬軟件建立工程模型,考慮整個(gè)工程的初始應(yīng)力分析,得出臨近隧道的變形曲線以及基坑開挖的影響范圍與深度,從而提出保證地鐵構(gòu)造安全性的合理措施。通過所建立的工程數(shù)據(jù)模型,采用單一變量法,改變基坑與結(jié)構(gòu)的相對(duì)位置關(guān)系以及相應(yīng)的施工條件,分別模擬了兩者之間的水平位置、正下方位置以及側(cè)方向的位置等情況變化下,原有結(jié)構(gòu)的偏移量以及所受到的不同應(yīng)力。對(duì)基坑開挖臨近既有隧道的保護(hù)方案進(jìn)行比選與設(shè)計(jì),通過不同施工措施和方案控制基坑變形與周邊土體沉降,提出保證結(jié)構(gòu)正常運(yùn)行的合理施工方案。
[Abstract]:With the rapid development of the national economy, the increase of underground pipelines, lines and structures, the excavation near the existing tunnel phenomenon has become the norm, the construction of foundation pit engineering makes the surrounding soil deformation and stability between the different structural forms and their changes will affect the distance of the adjacent tunnel in different degrees, both there are additional stress of soil around the subway tunnel gradually increased, offset to produce different degrees. The structure stability of tunnel damage may cause heavy losses to public property. Based on the existing tunnel excavation influence situation should be studied, reasonable control measures of safety. The software MIDAS/GTS to establish data model through the finite element numerical simulation, near the Zhengzhou Metro ground engineering excavation and monitoring data based on simulated excavation in different Effect of different depth and the horizontal position of the adjacent structure, and put forward the corresponding control and protection measures. The reference of domestic and overseas scholars of academic achievements, analyzed the deformation characteristics of the impact of the foundation pit engineering construction under different conditions and different position of adjacent structures. The relationship between the two, the soil deformation control scheme, engineering the construction sequence, and drainage measures are summarized. The Zhengzhou Metro adjacent construction project based on the finite element numerical simulation software engineering model was established, considering the initial engineering stress analysis, the deformation curve near the tunnel and the excavation influence scope and depth, so as to put forward reasonable measures to ensure the safety of subway construction. According to the engineering data model is established by using a single variable method, changing the relative position between the foundation and structure and the corresponding construction conditions, The horizontal position between the two are simulated, such as location changes just below the position and side direction, the offset of the original structure and the different stress. To protect the scheme of foundation pit excavation near the existing tunnel is selected and designed, through different construction measures and schemes to control the deformation of foundation pit and the surrounding soil settlement, reasonable construction scheme is proposed to guarantee the normal operation of the structure.

【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U451

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 戴鵬祥;孫華圣;;基坑開挖卸荷對(duì)既有隧道變形影響的三維有限元分析[J];施工技術(shù);2016年05期

2 張治國(guó);徐晨;;緊鄰運(yùn)營(yíng)地鐵進(jìn)行基坑施工的影響因素研究[J];上海理工大學(xué)學(xué)報(bào);2016年01期

3 曹順;錢德玲;魏雪云;程紅;馬曉菲;;隧道基坑開挖卸載對(duì)既有地鐵的影響與變形控制[J];合肥工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年12期

4 何連f;張俊;;基坑開挖與臨近既有隧道的相互影響[J];沈陽建筑大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年05期

5 魏綱;趙城麗;蔡呂路;;基坑開挖對(duì)臨近既有盾構(gòu)隧道影響的機(jī)理研究[J];市政技術(shù);2013年06期

6 裴行凱;倪小東;;深基坑開挖對(duì)臨近既有地鐵隧道的影響分析與對(duì)策[J];水利與建筑工程學(xué)報(bào);2013年03期

7 丁樹奎;;北京城市軌道交通新一輪建設(shè)高峰下的設(shè)備技術(shù)創(chuàng)新展望[J];都市快軌交通;2012年05期

8 張俊峰;王建華;溫鎖林;;軟土基坑引起下臥隧道隆起的非線性流變[J];土木建筑與環(huán)境工程;2012年03期

9 鄭剛;劉慶晨;鄧旭;張立明;;基坑開挖對(duì)下臥運(yùn)營(yíng)地鐵既有箱體影響的實(shí)測(cè)及分析[J];巖土力學(xué);2012年04期

10 王燕燕;莫海鴻;;基坑開挖對(duì)近距離地鐵隧道及車站影響的計(jì)算分析[J];科學(xué)技術(shù)與工程;2011年24期

相關(guān)碩士學(xué)位論文 前2條

1 卜佳;基坑開挖對(duì)既有地鐵隧道的變形影響研究[D];中國(guó)地質(zhì)大學(xué)(北京);2015年

2 王印;深基坑開挖對(duì)緊鄰地鐵車站影響的位移分析及施工保護(hù)措施研究[D];同濟(jì)大學(xué);2008年

，

本文編號(hào)：1546557