【摘要】：最近幾年我國(guó)中西部地區(qū)在大力發(fā)展城市地下軌道交通,但是,我國(guó)中西部地區(qū)的地質(zhì)情況決定了不能夠直接使用以前在沿海發(fā)達(dá)地區(qū)地鐵隧道或者山嶺隧道的設(shè)計(jì)施工經(jīng)驗(yàn)。本文對(duì)我國(guó)中西部黃土地區(qū)的城市地鐵建設(shè)過(guò)程中對(duì)周邊臨近建筑物可能造成的不均勻沉降、建筑物傾斜、建筑物水平移動(dòng)以及結(jié)構(gòu)內(nèi)力等方面的問(wèn)題進(jìn)行了分析,同時(shí)進(jìn)行了距離參數(shù)和左右兩隧洞的開(kāi)挖順序?qū)ㄖ锏挠绊懷芯�。為了分析黃土地區(qū)地鐵隧道對(duì)臨近建筑物的影響,本文在參考了大量相關(guān)文獻(xiàn)的基礎(chǔ)上,以正在建設(shè)的蘭州地鐵城市軌道交通一號(hào)線為研究背景,通過(guò)對(duì)隧道施工現(xiàn)場(chǎng)的黃土層進(jìn)行取樣分析,在室內(nèi)試驗(yàn)取得黃土試樣的各種實(shí)際參數(shù)。在確定了此黃土試樣的各種相關(guān)特征性質(zhì)后,運(yùn)用ansys數(shù)值仿真分析軟件,建立了框架結(jié)構(gòu)在隧道施工過(guò)程中的計(jì)算模型,用來(lái)分析研究建筑物在隧道掘進(jìn)過(guò)程中的沉降特征以及內(nèi)力變化特征。本文中主要的研究?jī)?nèi)容及取得的成果如下:(1)在蘭州地鐵隧道的施工現(xiàn)場(chǎng)開(kāi)挖出的掌子面上對(duì)黃土層原狀土進(jìn)行了取樣,之后在實(shí)試驗(yàn)室通過(guò)含水率試驗(yàn)、密度試驗(yàn)、液塑限試驗(yàn)、滲透試驗(yàn)以及三軸壓縮試驗(yàn),可靠的取得了黃土試樣的含水率、密度、液塑限、滲透系數(shù)、粘聚力以及內(nèi)摩擦角等參數(shù),保證了之后數(shù)值模擬的可靠性。(2)根據(jù)實(shí)際測(cè)得黃土試樣參數(shù),應(yīng)用ansys軟件建立了臨近隧道的框架結(jié)構(gòu)在隧道施工中的三維實(shí)體模型計(jì)算模型。對(duì)建筑物與地面接觸的各個(gè)基點(diǎn)進(jìn)行了豎向位移以及水平位移分析,然后對(duì)建筑物的傾斜進(jìn)行了分析,最后對(duì)建筑物的結(jié)構(gòu)內(nèi)力的變化規(guī)律進(jìn)行了有針對(duì)的分析。對(duì)建筑物在隧道施工過(guò)程中的不均勻沉降的特征、水平移動(dòng)的規(guī)律、傾斜變化以及建筑物的結(jié)構(gòu)內(nèi)力在隧道掘進(jìn)過(guò)程中的變化規(guī)律進(jìn)行了研究。(3)通過(guò)改變隧道左右兩個(gè)隧洞的開(kāi)挖順序,分析了在不同的開(kāi)挖順序下建筑物的位移、傾斜以及結(jié)構(gòu)內(nèi)力的變化特征。結(jié)果表明,先開(kāi)挖距離建筑物較遠(yuǎn)的隧洞對(duì)建筑物的構(gòu)件內(nèi)力影響最小,而左右兩條隧洞同時(shí)開(kāi)挖時(shí)對(duì)控制建筑物的差異沉降最有利。(4)通過(guò)改變模型中建筑物的位置,進(jìn)行了距離參數(shù)對(duì)建筑物影響的研究分析。對(duì)比了在不同距離參數(shù)下建筑物的位移變化情況、傾斜情況以及內(nèi)力變化,為以后類(lèi)似情況下的建筑物的位移變化、建筑物的傾斜和結(jié)構(gòu)內(nèi)力的預(yù)測(cè)提供一定的參考。
[Abstract]:In recent years, the central and western regions of China are vigorously developing urban underground rail transit. However, the geological conditions in the central and western regions of China determine that the previous design and construction experience of subway tunnels or mountain tunnels in coastal developed areas can not be directly used. In this paper, the problems of uneven settlement, building tilt, horizontal movement of buildings and internal force of structures in the process of urban subway construction in loess areas of central and western China are analyzed. At the same time, the influence of distance parameters and excavation sequence of left and right tunnels on the building is studied. In order to analyze the influence of subway tunnel on adjacent buildings in loess area, this paper takes Lanzhou Metro Urban Rail Transit Line 1 as the research background on the basis of referring to a large number of relevant literature. Through sampling and analysis of loess layer in tunnel construction site, various actual parameters of loess sample are obtained in laboratory test. After determining all kinds of related characteristic properties of the loess sample, the calculation model of the frame structure in the tunnel construction process is established by using ansys numerical simulation analysis software. It is used to analyze and study the settlement characteristics and internal force variation characteristics of buildings in the process of tunnel excavation. The main research contents and achievements in this paper are as follows: (1) the undisturbed soil of loess layer was sampled on the palm surface excavated at the construction site of Lanzhou Metro Tunnel, and then the moisture content test and density test were carried out in the real laboratory. The parameters of moisture content, density, liquid plastic limit, permeability coefficient, cohesion and internal friction angle of loess samples were obtained reliably by liquid plastic limit test, permeability test and triaxial compression test. The reliability of the subsequent numerical simulation is guaranteed. (2) according to the actual measured loess sample parameters, the three-dimensional solid model calculation model of the frame structure of the adjacent tunnel in tunnel construction is established by using ansys software. The vertical displacement and horizontal displacement of each base point in contact between the building and the ground are analyzed, and then the tilt of the building is analyzed. Finally, the variation law of the internal force of the structure of the building is analyzed. According to the characteristics of uneven settlement of buildings in the process of tunnel construction, the law of horizontal movement, The variation of tilt and the internal force of the structure of the building in the process of tunnel excavation are studied. (3) by changing the excavation sequence of the two tunnels around the tunnel, the displacement of the building under different excavation order is analyzed. The variation characteristics of tilt and internal force of the structure. The results show that the internal force of the building is the least affected by the excavation of the tunnel which is far away from the building, while the two tunnels are excavated at the same time to control the differential settlement of the building. (4) by changing the position of the building in the model, The influence of distance parameters on buildings is studied and analyzed. The displacement variation, tilt condition and internal force change of the building under different distance parameters are compared, which provides a certain reference for the displacement change of the building under similar conditions, the tilt of the building and the prediction of the internal force of the structure in the future.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：U455.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李振強(qiáng);;地鐵施工監(jiān)測(cè)信息化分析探討[J];科技與企業(yè);2014年09期

2 王劍;鄧宗偉;;某超大直徑斷面頂管施工引起的地層位移分析[J];鐵道科學(xué)與工程學(xué)報(bào);2014年02期

3 秦元帥;;淺談地層空洞影響下城市隧道施工引起的地層變形規(guī)律及控制方法[J];科技創(chuàng)新與應(yīng)用;2014年02期

4 唐健;;建筑物施工對(duì)下部高鐵隧道結(jié)構(gòu)變形影響分析[J];交通科技;2013年03期

5 李世慧;李帥;吳勇;;地鐵隧道施工對(duì)鄰近建筑結(jié)構(gòu)的影響研究簡(jiǎn)介[J];科技信息;2013年14期

6 孫征宇;;某基坑工程施工對(duì)鄰近建筑物安全影響評(píng)估分析[J];結(jié)構(gòu)工程師;2012年03期

7 柯慶輝;趙志飛;楊光;;隧道施工對(duì)地下管線的影響規(guī)律研究[J];公路與汽運(yùn);2012年03期

8 胡斌;劉永林;唐輝明;徐海清;;武漢地鐵虎泉—名都區(qū)間隧道開(kāi)挖引起的地表沉降研究[J];巖石力學(xué)與工程學(xué)報(bào);2012年05期

9 徐勝樂(lè);商岸帆;;某地鐵車(chē)站深基坑工程監(jiān)測(cè)方案[J];黑龍江科技信息;2012年01期

10 楊開(kāi)艮;;盾構(gòu)施工與鄰近不同位置建筑物相互影響分析[J];科技風(fēng);2011年23期

相關(guān)會(huì)議論文 前1條

1 魏新江;魏綱;丁智;;盾構(gòu)施工與鄰近不同位置建筑物相互影響分析[A];第九屆全國(guó)巖土力學(xué)數(shù)值分析與解析方法討論會(huì)論文集[C];2007年

相關(guān)碩士學(xué)位論文 前5條

1 陳旭;高速鐵路基坑鄰近建筑物的監(jiān)測(cè)及安全評(píng)價(jià)[D];長(zhǎng)沙理工大學(xué);2010年

2 俞凱;城市地鐵隧道施工沉降對(duì)鄰近建筑的影響研究[D];西南交通大學(xué);2008年

3 張長(zhǎng)亮;基于監(jiān)控量測(cè)與數(shù)值分析的隧道圍巖穩(wěn)定性判定方法研究[D];重慶交通大學(xué);2008年

4 滕紅軍;城市隧道穿越地面建筑物的安全風(fēng)險(xiǎn)控制[D];北京交通大學(xué);2007年

5 楊海朋;施工過(guò)程中淺埋隧道自身性狀及上部建筑物沉降變形的數(shù)值分析[D];湖南大學(xué);2007年

，

本文編號(hào)：2473499