本文選題：巖溶隧道 + 高水壓��； 參考：《中南大學(xué)》2014年碩士論文

【摘要】：隨著西部地區(qū)鐵路網(wǎng)的拓展,特別是高速鐵路的大量修建,在巖溶地區(qū)修建隧道不可避免。在巖溶區(qū)高水壓的作用下,保證襯砌結(jié)構(gòu)的長(zhǎng)期安全是一大難題。近年來(lái),因高水壓造成的襯砌開(kāi)裂、仰拱破壞等問(wèn)題越來(lái)越多。因此,研究高水壓巖溶隧道襯砌結(jié)構(gòu)受力特征和防排水設(shè)計(jì)成為一項(xiàng)重要課題。 論文采用實(shí)測(cè)數(shù)據(jù)統(tǒng)計(jì)分析和數(shù)值模擬的研究手段,研究了高水壓巖溶隧道襯砌水壓力特征和襯砌內(nèi)力特征,并對(duì)防排水設(shè)計(jì)進(jìn)行探討。本文在前人研究的基礎(chǔ)上開(kāi)展研究,其主要工作如下： (1)對(duì)近年來(lái)國(guó)內(nèi)外高水壓隧道襯砌水壓力的實(shí)測(cè)數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析,分析了襯砌水壓力的影響因素,研究了不同防排水方式下襯砌水壓力的分布規(guī)律。 (2)建立隧道水壓力模糊綜合評(píng)價(jià)體系,根據(jù)水壓力模糊評(píng)價(jià)結(jié)果分級(jí),合理選擇不同的防排水設(shè)計(jì)方式。 (3)以成貴客運(yùn)專線應(yīng)山巖隧道為工程背景,基于流固耦合理論,采用數(shù)值模擬手段,建立二維模型,研究襯砌水壓力和結(jié)構(gòu)內(nèi)力特征,對(duì)“兩側(cè)溝+中心溝”設(shè)計(jì)方案的排水效果進(jìn)行評(píng)價(jià)。 (4)鑒于“兩側(cè)溝+中心溝”的排水方式導(dǎo)致仰拱襯砌水壓力大,提出仰拱下排水的設(shè)計(jì)方案,通過(guò)數(shù)值手段研究了仰拱下排水時(shí)襯砌結(jié)構(gòu)受力特征,并對(duì)仰拱下排水的設(shè)計(jì)進(jìn)行探討。 (5)采用數(shù)值手段,并調(diào)研國(guó)內(nèi)外工程案例,對(duì)高水壓巖溶隧道限排標(biāo)準(zhǔn)、注漿圈合理厚度和注漿圈合理滲透系數(shù)進(jìn)行探討。
[Abstract]:With the development of the railway network in the western region , especially the large - scale construction of high - speed railway , the construction of tunnel in karst area is inevitable . In recent years , the problem of long - term safety of lining structure is a big problem . In recent years , it is an important task to study the stress characteristics and drainage design of lining structure of high water pressure karst tunnel .

In this paper , the characteristics of water pressure and internal force of lining in high water pressure karst tunnel are studied by means of data analysis and numerical simulation , and the design of waterproof drainage is discussed . The research is carried out on the basis of the previous research , and the main works are as follows :

( 1 ) Statistical analysis of the measured data of water pressure of high water pressure tunnel at home and abroad in recent years , the factors affecting the water pressure of lining are analyzed , and the distribution law of water pressure of lining under different drainage ways is studied .

( 2 ) establishing a fuzzy comprehensive evaluation system for tunnel water pressure , grading according to the fuzzy evaluation result of the water pressure , and reasonably selecting different drainage design modes .

( 3 ) Based on the theory of flow - solid coupling , a two - dimensional model is established based on the theory of flow - solid coupling , and the water pressure and internal force characteristics of lining are studied , and the drainage effect of the design scheme of " two sides ditch + central sulcus " is evaluated .

( 4 ) In view of the large water pressure of inverted arch lining caused by the drainage pattern of " two sides ditch + central groove " , the design scheme of drainage under inverted arch is put forward , and the stress characteristics of lining structure under inverted arch under inverted arch are studied by numerical method , and the design of drainage under inverted arch is discussed .

( 5 ) Using numerical method , and investigating domestic and foreign project cases , this paper probes into the criteria of high water pressure karst tunnel , the reasonable thickness of grouting circle and the reasonable permeability coefficient of grouting circle .

【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U451.4;U453.6

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本文編號(hào)：1827469