自淤沉管管流特性與壘管結(jié)構(gòu)護(hù)岸效應(yīng)技術(shù)研究
發(fā)布時(shí)間：2019-06-21 02:09
【摘要】：河道崩岸是長江中下游十分普遍和突出的地質(zhì)災(zāi)害,在一定程度上威脅著兩岸居民的人生財(cái)產(chǎn)安全。目前,對于長江崩岸的治理雖然采取了許多積極的護(hù)岸措施,隨著工程實(shí)踐表明,很多護(hù)岸方法在一定條件下起到了一定的效果,但依然存在一定的局限性。因此本文擬在現(xiàn)有研究、實(shí)踐的基礎(chǔ)上,探討一種新的低成本護(hù)岸手段。本文調(diào)查研究了國內(nèi)外有關(guān)崩岸問題的理論與技術(shù)文獻(xiàn)資料,整理分析了部分不同類型的護(hù)岸工程的特點(diǎn)以及存在的問題,對崩岸機(jī)理及引發(fā)崩岸的影響因素進(jìn)行總結(jié)歸納。在此基礎(chǔ)上提出了自淤沉管與混凝土膜袋綜合治理和預(yù)防長江崩岸的方法。所謂自淤沉管是一種沉入近岸江底的長管,水流通過長管內(nèi)部的消能裝置,江水挾帶的泥沙在管內(nèi)自然沉降淤積,籍此充填長管增加自重,起到鎮(zhèn)重作用�？蓪⒁桓L管壘成一個(gè)整體形成“壘管結(jié)構(gòu)”,與混凝土膜袋配合使用,既起到替代拋石壓重鎮(zhèn)腳護(hù)岸的目的,又能夠適應(yīng)河床與岸坡變形,使之與河床、岸坡緊密貼合,進(jìn)一步穩(wěn)固岸坡,達(dá)到護(hù)岸的目的,長治高效。本文采用竇國仁泥沙計(jì)算理論得出泥沙沉降對水流流速的要求,通過室內(nèi)模型試驗(yàn)研究確定自淤沙管的減速裝置和最佳減速效果的模型尺寸。在此基礎(chǔ)上,選用九江市彭澤縣棉船鎮(zhèn)一長江流段為室外足尺試驗(yàn)地點(diǎn),驗(yàn)證其淤沙效果。利用FLOW-3D數(shù)值模擬軟件,模擬分析自淤沉管內(nèi)部水流的流速和流態(tài)變化,進(jìn)一步探討自淤沉管的淤沙機(jī)理,證明它的減速效果。針對壘管結(jié)構(gòu)形式對周邊水流和河床泥沙的影響進(jìn)行數(shù)值模擬分析,探討了改進(jìn)壘管結(jié)構(gòu)對周邊流體特性和對河床的侵蝕作用,進(jìn)一步完善壘管結(jié)構(gòu),為將壘管結(jié)構(gòu)賦諸工程實(shí)施提供技術(shù)支撐。
[Abstract]:River bank collapse is a very common and prominent geological disaster in the middle and lower reaches of the Yangtze River, which threatens the life and property safety of residents on both sides of the strait to a certain extent. At present, although many positive measures have been taken to protect the bank of the Yangtze River, with the engineering practice, many revetment methods have played a certain effect under certain conditions, but there are still some limitations. Therefore, this paper intends to explore a new low-cost revetment method on the basis of the existing research and practice. In this paper, the theoretical and technical literature on bank collapse at home and abroad is investigated and studied, the characteristics and existing problems of some different types of bank protection projects are sorted out and analyzed, and the mechanism of bank collapse and the influencing factors causing bank collapse are summarized and summarized. On this basis, the comprehensive treatment of self-silting pipe and concrete film bag and the method of preventing the bank collapse of the Yangtze River are put forward. The so-called self-silting pipe is a kind of long pipe which sinks into the bottom of the inshore river. The water flow passes through the energy dissipation device inside the long pipe, and the sediment carried by the river water is naturally settled and silted in the pipe, thus filling the long pipe to increase the self-weight and play the role of calming weight. A long pipe can be formed into a whole "barrier pipe structure", which can be used in combination with concrete film bag, which can not only replace the purpose of bank protection, but also adapt to the deformation of river bed and bank slope, make it closely fit with river bed and bank slope, further stabilize the bank slope, achieve the purpose of bank protection, and achieve the purpose of long treatment and high efficiency. In this paper, the requirement of sediment sedimentation on flow velocity is obtained by using Dou Guoren sediment calculation theory, and the deceleration device of self-silting pipe and the model size of optimal deceleration effect are determined by laboratory model test. On this basis, the Yangtze River flow section of Mianchuan Town, Pengze County, Jiujiang City, was selected as the outdoor full-scale test site to verify the sediment silting effect. By using FLOW-3D numerical simulation software, the flow velocity and flow pattern in the self-silting tube are simulated and analyzed, and the silting mechanism of the self-silting pipe is further discussed, and its deceleration effect is proved. In view of the numerical simulation analysis of the influence of barrier pipe structure on the surrounding water flow and riverbed sediment, this paper probes into the improved barrier pipe structure on the surrounding fluid characteristics and the erosion effect on the river bed, further perfects the barrier pipe structure, and provides technical support for the implementation of the barrier pipe structure.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV861
本文編號：2503703
[Abstract]:River bank collapse is a very common and prominent geological disaster in the middle and lower reaches of the Yangtze River, which threatens the life and property safety of residents on both sides of the strait to a certain extent. At present, although many positive measures have been taken to protect the bank of the Yangtze River, with the engineering practice, many revetment methods have played a certain effect under certain conditions, but there are still some limitations. Therefore, this paper intends to explore a new low-cost revetment method on the basis of the existing research and practice. In this paper, the theoretical and technical literature on bank collapse at home and abroad is investigated and studied, the characteristics and existing problems of some different types of bank protection projects are sorted out and analyzed, and the mechanism of bank collapse and the influencing factors causing bank collapse are summarized and summarized. On this basis, the comprehensive treatment of self-silting pipe and concrete film bag and the method of preventing the bank collapse of the Yangtze River are put forward. The so-called self-silting pipe is a kind of long pipe which sinks into the bottom of the inshore river. The water flow passes through the energy dissipation device inside the long pipe, and the sediment carried by the river water is naturally settled and silted in the pipe, thus filling the long pipe to increase the self-weight and play the role of calming weight. A long pipe can be formed into a whole "barrier pipe structure", which can be used in combination with concrete film bag, which can not only replace the purpose of bank protection, but also adapt to the deformation of river bed and bank slope, make it closely fit with river bed and bank slope, further stabilize the bank slope, achieve the purpose of bank protection, and achieve the purpose of long treatment and high efficiency. In this paper, the requirement of sediment sedimentation on flow velocity is obtained by using Dou Guoren sediment calculation theory, and the deceleration device of self-silting pipe and the model size of optimal deceleration effect are determined by laboratory model test. On this basis, the Yangtze River flow section of Mianchuan Town, Pengze County, Jiujiang City, was selected as the outdoor full-scale test site to verify the sediment silting effect. By using FLOW-3D numerical simulation software, the flow velocity and flow pattern in the self-silting tube are simulated and analyzed, and the silting mechanism of the self-silting pipe is further discussed, and its deceleration effect is proved. In view of the numerical simulation analysis of the influence of barrier pipe structure on the surrounding water flow and riverbed sediment, this paper probes into the improved barrier pipe structure on the surrounding fluid characteristics and the erosion effect on the river bed, further perfects the barrier pipe structure, and provides technical support for the implementation of the barrier pipe structure.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TV861
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 張健,方杰,范波芹;VOF方法理論與應(yīng)用綜述[J];水利水電科技進(jìn)展;2005年02期
2 李若華,周春天,嚴(yán)忠民;拋石護(hù)岸岸腳淘刷機(jī)理試驗(yàn)研究[J];江西水利科技;2003年04期
3 陳永新,韓秀,劉國強(qiáng);砼四面體在江卡渠首消能防沖中的運(yùn)用[J];塔里木農(nóng)墾大學(xué)學(xué)報(bào);2003年03期
4 黃本勝,白玉川,萬艷春;河岸崩塌機(jī)理的理論模式及其計(jì)算[J];水利學(xué)報(bào);2002年09期
5 岳紅艷,余文疇;長江河道崩岸機(jī)理[J];人民長江;2002年08期
6 王俊;安徽省長江護(hù)岸工程[J];人民長江;2002年08期
7 王南,陳實(shí),王洪波;黑龍江干流護(hù)岸工程護(hù)腳結(jié)構(gòu)形式探討[J];水利科技與經(jīng)濟(jì);2002年02期
8 潘錦江,譚泳;北江大堤崩岸機(jī)理及其工程措施探討[J];廣東水利水電;2002年01期
9 寧方飛,徐力平;二維定常湍流計(jì)算中的GMRES算法[J];力學(xué)學(xué)報(bào);2001年04期
10 漆愛捺;長江堤防護(hù)岸工程技術(shù)綜述[J];水利水電技術(shù);2001年03期
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