本文選題：泥石流 + 危險區(qū)劃　； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：我國西南山區(qū)是泥石流災(zāi)害比較發(fā)育的地區(qū)。隨著西南山區(qū)經(jīng)濟(jì)的發(fā)展,交通路網(wǎng)的建立,公路、鐵路橋涵等道路關(guān)鍵工程遭遇泥石流災(zāi)害的頻率也越來越高,因此對道路橋梁泥石流災(zāi)害的研究也愈來愈重視。永盛縣熱河古格村大箐流域曾多次爆發(fā)泥石流災(zāi)害,造成省道S220過溝橋涵嚴(yán)重淤堵,下游沿岸的農(nóng)田被淤埋,成為威脅省道S220過溝橋涵及古格村村民生命財(cái)產(chǎn)安全的重大地質(zhì)災(zāi)害隱患點(diǎn)。本文以大箐泥石流和省道S220橋梁為研究對象,對大箐泥石流的形成背景及危害進(jìn)行了介紹,并從大箐泥石流形成的地形條件、物源條件和水源條件分析入手,對大箐泥石流的啟動模式、物性特征以及泥石流的發(fā)展趨勢進(jìn)行了詳細(xì)論述,計(jì)算了大箐泥石流的主要動力學(xué)參數(shù),并對泥石流的危險區(qū)進(jìn)行了劃分,有針對性的調(diào)查了大箐泥石流對省道S220過溝橋涵的破壞方式。在上述分析論證的基礎(chǔ)上,采用ANSYS Workbench進(jìn)行瞬態(tài)動力學(xué)分析,研究了古格大橋橋墩在泥石流整體沖擊作用與大石塊沖擊作用下的響應(yīng),獲得了橋墩在不同荷載工況組合條件下的變形和受力狀態(tài),并對泥石流沖擊作用下橋墩的破壞規(guī)律及主導(dǎo)因素進(jìn)行了詳細(xì)分析�；谀嗍髋c橋墩的雙向流固耦合分析結(jié)果,對泥石流作用區(qū)橋梁墩臺的防護(hù)措施進(jìn)行了深入探討,列舉了各種措施的適用條件與特點(diǎn),并對比分析了相同截面面積下,圓形橋墩、矩形橋墩、圓端形橋墩抵抗泥石流沖擊性能的高低,對泥石流作用區(qū)橋梁橋墩的設(shè)計(jì)及防護(hù)措施的選擇具有重要的指導(dǎo)意義。為切實(shí)有效的保障省道S220橋涵及沿岸村民的生命財(cái)產(chǎn)安全,參考類似泥石流溝谷的防治經(jīng)驗(yàn),選擇“谷坊壩、攔擋壩+束流堤、防護(hù)堤”以攔排為主的工程治理措施對泥石流進(jìn)行治理,并對攔擋措施選擇最不利的荷載組合進(jìn)行穩(wěn)定驗(yàn)算,計(jì)算結(jié)果滿足設(shè)計(jì)要求。
[Abstract]:The mountainous area of southwest China is a relatively developed area of debris flow disaster. With the development of the southwest mountainous area economy, the establishment of traffic network, the frequency of the debris flow disaster in the key projects such as highway, railway bridge and culvert are becoming higher and higher, so more and more attention has been paid to the study of the road bridge debris flow disaster. Debris flow disasters broke out many times in the Daqing Valley of Gehe Guge Village, Yongsheng County, resulting in serious siltation of the provincial highway S220 crossing gully bridges and culverts, and buried farmland along the lower reaches of the river. It has become a major geological hazard hidden danger point that threatens the safety of life and property of villagers in S220 crossing ditch bridge culvert and Guge village. This paper takes Daqing debris flow and provincial highway S220 bridge as the research object, introduces the formation background and harm of Daqing debris flow, and starts with the analysis of terrain condition, material source condition and water source condition of the formation of Daqing debris flow. The starting mode, physical properties and development trend of Daqing debris flow are discussed in detail, the main dynamic parameters of Daqing debris flow are calculated, and the dangerous areas of debris flow are divided. The damage mode of Daqing debris flow to S 220 bridge and culvert was investigated. On the basis of the above analysis and demonstration, the transient dynamic analysis of the pier of Guge Bridge under the impact of debris flow as a whole and the impact of large rocks is studied by using ANSYS Workbench. The deformation and stress state of the pier under different load conditions are obtained, and the failure law and leading factors of the pier under the impact of debris flow are analyzed in detail. Based on the results of two-way fluid-solid coupling analysis of debris flow and pier, the protective measures of bridge pier and abutment in debris flow area are discussed in depth, the applicable conditions and characteristics of various measures are listed, and the same cross-section area is compared and analyzed. The resistance of circular pier, rectangular pier and round end pier to debris flow impact is of great significance to the design of bridge piers in debris flow zone and the selection of protection measures. In order to ensure the life and property safety of the bridge and culvert of provincial highway S220 and the villagers along the coast, referring to the prevention and cure experience similar to the debris flow gully, "Gufang Dam" and "Gufang Dam" are selected. The embankment is controlled by the engineering measures of blocking and drainage, and the stability check calculation of the most unfavorable load combination of the blocking measures is carried out, and the calculation results meet the design requirements.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U443.22;U445.75

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐曉春,唐邦興;我國災(zāi)害地貌及其防治研究中的幾個問題[J];自然災(zāi)害學(xué)報;1994年01期

2 唐曉春,劉會平,唐川;云南省泥石流防治模式研究[J];自然災(zāi)害學(xué)報;2001年04期

3 胡凱衡;韋方強(qiáng);洪勇;黎小宇;;泥石流沖擊力的野外測量[J];巖石力學(xué)與工程學(xué)報;2006年S1期

4 陳洪凱;唐紅梅;陳野鷹;;RESEARCH ON METHOD TO CALCULATE VELOCITIES OF SOLID PHASE AND LIQUID PHASE IN DEBRIS FLOW[J];Applied Mathematics and Mechanics(English Edition);2006年03期

5 張宇;韋方強(qiáng);王青;;基于動量守恒的粘性泥石流沖擊力計(jì)算[J];泥沙研究;2006年03期

6 陶云;唐川;段旭;;云南滑坡泥石流災(zāi)害及其與降水特征的關(guān)系[J];自然災(zāi)害學(xué)報;2009年01期

7 Sergey CHERNOMORETS;;Measuring the Internal Velocity of Debris Flows Using Impact Pressure Detecting in the Flume Experiment[J];Journal of Mountain Science;2011年02期

8 劉麗;陳洪凱;;泥石流運(yùn)動力學(xué)研究現(xiàn)狀及趨勢[J];重慶交通大學(xué)學(xué)報(自然科學(xué)版);2010年02期

9 梅濤;肖盛燮;;橋墩受泥石流破壞機(jī)理分析[J];山西建筑;2011年08期

10 萬石云;李華宏;胡娟;;云南省滑坡泥石流災(zāi)害危險區(qū)劃[J];災(zāi)害學(xué);2013年02期

相關(guān)碩士學(xué)位論文 前7條

1 楊梓芳;永勝片角泥石流形成條件與防治對策研究[D];長安大學(xué);2015年

2 李彥婷;綿竹市清平鄉(xiāng)文家溝震后泥石流災(zāi)害發(fā)育特征及防治工程措施研究[D];成都理工大學(xué);2011年

3 易靜;泥石流對成蘭鐵路鎮(zhèn)江關(guān)車站影響評價[D];成都理工大學(xué);2010年

4 歐陽猛;公路泥石流災(zāi)害特征參數(shù)確定與防治對策研究[D];中南大學(xué);2008年

5 王勇智;固液兩相泥石流運(yùn)動計(jì)算力學(xué)[D];重慶交通大學(xué);2008年

6 周小彬;泥石流對橋梁工程的危害及其防治[D];同濟(jì)大學(xué);2006年

7 馬宗源;泥石流流場三維數(shù)值模擬研究[D];長安大學(xué);2006年

，

本文編號：1886758