本文關(guān)鍵詞：黃土地區(qū)土巖變層中隧道結(jié)構(gòu)體系受力特征研究　出處：《西安科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 隧道 黃土 土巖變層 模型

【摘要】：隨著國家西部大開發(fā)戰(zhàn)略部署的實(shí)施,西部地區(qū)的基礎(chǔ)建設(shè)也得到了火速發(fā)展,黃土地區(qū)公路、鐵路、輸水輸氣隧道也在逐年增多,所面臨的施工與運(yùn)營安全問題越來越多。所以說對黃土地區(qū)隧道結(jié)構(gòu)體系受力特征的研究是非常嚴(yán)峻的,因為大多數(shù)的黃土地區(qū)的隧道并非只處于黃土地層中,黃土地區(qū)的隧道處于土巖變層中的情況較多,因此對該地區(qū)的研究應(yīng)當(dāng)引起足夠的重視。本文在對國內(nèi)外黃土地區(qū)隧道研究現(xiàn)狀及存在的問題大量總結(jié)的基礎(chǔ)上,擇取適合于黃土地區(qū)隧道研究的方法理論,即地層—結(jié)構(gòu)計算模型,并根據(jù)工程實(shí)例,將黃土地區(qū)隧道分為處于黃土地層中的隧道和處于土巖變層中的隧道兩大類,依托工程實(shí)例,應(yīng)用ANSYS有限元大型計算軟件,通過建立隧道洞室的有限元模型,對多種不同工況下的黃土地區(qū)隧道結(jié)構(gòu)體系受力特征進(jìn)行對比分析。通過對黃土層中兩種不同襯砌厚度隧道結(jié)構(gòu)體系受力特征的研究,且對這兩種工況下黃土層中隧道結(jié)構(gòu)體系受力特征進(jìn)行了分析比較。得到襯砌厚度的增加對隧道周圍黃土是有影響的,在一定范圍內(nèi),襯砌厚度小時,隧道結(jié)構(gòu)發(fā)生的位移較大,襯砌的應(yīng)力較大,而當(dāng)襯砌厚度較厚時,隧道結(jié)構(gòu)發(fā)生的位移較小,襯砌所的應(yīng)力較小,隧道結(jié)構(gòu)體系也就比較穩(wěn)定。分別從土巖變層作用位置在隧道洞室墻腳處、拱腳處、拱上對黃土地區(qū)土巖變層中的隧道結(jié)構(gòu)體系進(jìn)行受力特征分析,對黃土層中的工況與土巖變層中的工況進(jìn)行隧道結(jié)構(gòu)體系受力特征的比較。得到土巖變層位置對土巖變層中的隧道結(jié)構(gòu)體系是會產(chǎn)生一定影響的,當(dāng)其他各項條件一定時,土巖變層位置越接近地表,襯砌所須要承受的應(yīng)力也就減小,隧道結(jié)構(gòu)體系也就比較穩(wěn)定。黃土地區(qū)土巖變層中的隧道結(jié)構(gòu)體系下部巖體負(fù)擔(dān)了一部分的力,阻止了隧道結(jié)構(gòu)體系產(chǎn)生更大的變形。
[Abstract]:With the country's western development strategy deployment, infrastructure construction of the western region has been the rapid development of highway in loess area, railway, water and gas tunnel is increasing year by year, the construction and operation of security problems faced by more and more. So the study on stress characteristics of tunnel structure system in Loess Area is very serious because most of the tunnel, not only in the Loess Area in loess area, loess tunnel in rock soil layer in many cases, so the research in this area should be caused enough attention. Based on the domestic and foreign research status of tunnel in loess area and the problems of a large number of summary, theory and method this is suitable for study of tunnel in the loess area, the stratum structure model, and according to the engineering example, the loess tunnel is divided into Loess Tunnel and in Rock and soil layer in the tunnel two categories, based on the engineering examples, the application of ANSYS finite element calculation software, through the establishment of finite element model of tunnel, analyzed the stress characteristics of loess tunnel structure in different working conditions. Through the study on stress characteristics of two kinds of different thickness of lining in Loess layer the tunnel structure system, and on the two conditions of tunnel structure in loess layer stress characteristics were analyzed and compared. The increase of the thickness of lining has influence on tunnel surrounding loess, in a certain range, the thickness of the lining structure of tunnel small, larger displacement, the stress of the lining is larger, and the when the lining thickness, small displacement of tunnel structure occurs, the lining stress is small and the tunnel structure is relatively stable. From the rock layer in the tunnel location, arch foot, arch The force characteristic analysis on Loess Soil and rock layer in the tunnel structure, compare the tunnel structure stress characteristic of conditions in loess layer and soil layer in the variable conditions. The soil rock variable layer position on tunnel structure in rock and soil layer have some effect when the other conditions, rock and soil layer is closer to the surface, lining need stress is reduced, tunnel structure is relatively stable. The lower part of the tunnel structure system of rock soil and rock layer in loess area becomes a part of the burden, prevent the tunnel structure deformation even more.

【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U451

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 何尉祥;;淺談我國地下工程的現(xiàn)狀與發(fā)展前景[J];才智;2013年18期

2 張梅;何志軍;張民慶;肖廣智;任誠敏;;高地應(yīng)力軟巖隧道變形控制設(shè)計與施工技術(shù)[J];現(xiàn)代隧道技術(shù);2012年06期

3 ，

本文編號：1379661