本文選題：大斷面隧道 + 扁平率�。� 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：近年來(lái),隨著我國(guó)經(jīng)濟(jì)不斷高速發(fā)展,城市化進(jìn)程中帶來(lái)的"城市病"現(xiàn)象不斷困擾著市民的日常生活。為解決擁堵問(wèn)題,新建市政公路車道數(shù)不斷增加,扁平率更低、跨度更大的單洞三車道及以上的大斷面公路隧道便應(yīng)運(yùn)而生,并呈現(xiàn)出快速增多的趨勢(shì)。鑒于現(xiàn)階段大斷面市政公路隧道扁平率與支護(hù)參數(shù)的選擇更多的是借鑒國(guó)內(nèi)外類似工程經(jīng)驗(yàn),并無(wú)一套成熟的技術(shù)可供參考。其扁平率與支護(hù)體系利用率與合理性、可靠度,是否適用于該工程等情況,有一定的研究空間。因此,開展大斷面市政公路隧道扁平率與支護(hù)參數(shù)的適宜性研究十分必要。本文以馬巒山隧道工程為依托,以統(tǒng)計(jì)分析,數(shù)值模擬,室內(nèi)試驗(yàn)為主要研究手段,系統(tǒng)研究了大斷面市政公路隧道扁平率與支護(hù)體系的適宜性,主要成果如下:(1)充分調(diào)研國(guó)內(nèi)外扁平大斷面隧道扁平率與支護(hù)參數(shù)現(xiàn)狀,依據(jù)調(diào)研數(shù)據(jù)對(duì)大斷面扁平隧道設(shè)計(jì)特征進(jìn)行分析研究總結(jié)規(guī)律,結(jié)合依托工程的設(shè)計(jì)資料,對(duì)依托工程隧道扁平率與支護(hù)參數(shù)的合理性進(jìn)行了初步評(píng)估。(2)在綜合調(diào)研國(guó)內(nèi)外大斷面隧道扁平率與支護(hù)參數(shù)的基礎(chǔ)上,以具體工程為依托,采用數(shù)值模擬、室內(nèi)試驗(yàn)等研究手段,對(duì)不同扁平率與支護(hù)參數(shù)下大斷面公路隧道的圍巖-支護(hù)體系穩(wěn)定性開展研究,重點(diǎn)對(duì)圍巖-支護(hù)體系的應(yīng)力、位移場(chǎng)演變特征、支護(hù)體系的受力特征等開展深入分析,揭示了大斷面公路隧道不同扁平率與支護(hù)參數(shù)下圍巖-結(jié)構(gòu)的力學(xué)行為特征,并探討了大斷面市政隧道扁平率與支護(hù)參數(shù)的適宜性。(3)以數(shù)值模擬及室內(nèi)試驗(yàn)研究為基礎(chǔ),結(jié)合當(dāng)前大斷面市政隧道扁平率與支護(hù)參數(shù)特點(diǎn),提出不同圍巖級(jí)別條件下大斷面市政隧道合理扁平率與支護(hù)參數(shù)范圍,對(duì)依托工程原設(shè)計(jì)進(jìn)行了優(yōu)化。
[Abstract]:In recent years, with the rapid development of China's economy, the phenomenon of "urban disease" in the process of urbanization has been puzzling the daily life of citizens. In order to solve the problem of congestion, the number of new municipal highway driveways is increasing, the flat rate is lower, and the large-section highway tunnels with larger span of single hole and three lanes and above emerge as the times require, and show a trend of rapid increase. In view of the fact that the selection of flat rate and supporting parameters of large-section municipal highway tunnel at present is more for reference of similar engineering experience at home and abroad, there is no mature technology for reference. The flat rate, the utilization ratio and the rationality of the support system, the reliability, and whether it is suitable for the project have some research space. Therefore, it is necessary to study the suitability of flat rate and supporting parameters of large section municipal highway tunnel. Based on the Malanshan tunnel project, the paper systematically studies the flatness rate and the suitability of supporting system of large-section municipal highway tunnel by means of statistical analysis, numerical simulation and laboratory test. The main results are as follows: (1) the present situation of flat rate and support parameters of flat and large section tunnels at home and abroad is fully investigated. According to the investigation data, the design characteristics of large section and large section tunnels are analyzed and summarized, and combined with the design data of supporting engineering, The rationality of tunnel flatness rate and supporting parameters of supporting engineering is preliminarily evaluated. On the basis of comprehensive investigation of the flat rate and supporting parameters of large cross-section tunnels at home and abroad, the numerical simulation is adopted based on the concrete project. The stability of surrounding rock support system of large cross section highway tunnel under different flattening rate and supporting parameters is studied by laboratory test, with emphasis on the evolution characteristics of stress and displacement field of surrounding rock support system. The mechanical behavior characteristics of surrounding rock structure under different flattening rate and support parameters of large-section highway tunnel are revealed by in-depth analysis of the mechanical characteristics of supporting system. The suitability of flat rate and supporting parameters of large section municipal tunnel is discussed. Based on numerical simulation and laboratory test, the characteristics of flat rate and supporting parameters of large section municipal tunnel are discussed. The reasonable flat rate and support parameter range of large-section municipal tunnel under different surrounding rock levels are put forward, and the original design of supporting engineering is optimized.
【學(xué)位授予單位】：西南交通大學(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 龔彥峰;張俊儒;徐向東;唐f，

本文編號(hào)：1976360