本文選題：泵站　切入點(diǎn)：有限元　出處：《揚(yáng)州大學(xué)》2015年碩士論文

【摘要】：劉橋泵站建于粉細(xì)砂地基上,而這類土壤顆粒之間無(wú)凝聚力或凝聚力很小,液化和管涌問(wèn)題較為嚴(yán)重。在上下游水位差的作用下,泵站地基將會(huì)產(chǎn)生較大的滲透變形,嚴(yán)重時(shí)泵房將沉陷而遭到破壞。而由滲流產(chǎn)生的豎直向上的揚(yáng)壓力減小了泵房的有效重量,對(duì)泵房的抗滑不利。因此對(duì)劉橋泵站的滲流和結(jié)構(gòu)穩(wěn)定分析有著非常重要的意義�；诖�,本文利用有限元軟件ABAQUS對(duì)劉橋泵站的滲流場(chǎng)和應(yīng)力場(chǎng)進(jìn)行了模擬,主要研究?jī)?nèi)容有：對(duì)劉橋泵站粉細(xì)砂地基的滲流進(jìn)行有限元分析,得出了其在上游不同作用水頭下的位移、孔壓、滲透水頭和滲透坡降。結(jié)果表明,劉橋泵站砂土地基的滲透坡降都偏大,滲透穩(wěn)定不滿足要求,滲流問(wèn)題是影響泵站安全運(yùn)行的重大隱患,因此必須對(duì)其進(jìn)行地基處理。為了保證劉橋泵站的正常運(yùn)行,在泵室底部加設(shè)封閉的防滲墻,墻內(nèi)用水泥土填充,對(duì)該經(jīng)過(guò)地基處理后的泵站滲流進(jìn)行有限元分析。結(jié)果表明,防滲墻大大改變了滲流場(chǎng)的分布,也大大降低了泵室底板下的滲透水頭。水平段和出口段的滲透坡降遠(yuǎn)小于允許的滲流坡降臨界值,劉橋泵站滿足滲透穩(wěn)定要求。對(duì)設(shè)有防滲墻的劉橋泵站整體進(jìn)行有限元分析,得出泵站在各個(gè)工況下的應(yīng)力分布規(guī)律。泵站最大主拉應(yīng)力小于混凝土抗拉強(qiáng)度,最大主壓應(yīng)力小于混凝土抗壓強(qiáng)度,泵站上部結(jié)構(gòu)不會(huì)出現(xiàn)拉壓應(yīng)力破壞。泵房底板底部都處于受壓狀態(tài),在泵室邊墩底部和中墩底部,底板與防滲墻接觸部位應(yīng)力都很集中,泵室底板中間處的豎向應(yīng)力分布比較均勻。泵室底板與地基接觸的地方應(yīng)力值都遠(yuǎn)遠(yuǎn)小于地基允許承載力,滿足要求。三種工況下泵房的抗滑穩(wěn)定系數(shù)都明顯大于允許值,滿足抗滑穩(wěn)定要求。
[Abstract]:The Liuqiao pumping station is built on silty sand foundation, and there is no cohesion or little cohesion between these kinds of soil particles, so the problems of liquefaction and piping are serious. Under the action of the water level difference between upstream and downstream, the foundation of the pumping station will produce large seepage deformation. In severe cases, the pump room will sink and be destroyed. The vertical uplift pressure generated by the seepage reduces the effective weight of the pump room. Therefore, it is very important to analyze the seepage and structural stability of the Liuqiao pumping station. Based on this, the seepage field and stress field of the Liuqiao pumping station are simulated by the finite element software ABAQUS. The main research contents are as follows: the seepage of silty sand foundation in Liuqiao pump station is analyzed by finite element method, and the displacement, pore pressure, seepage head and seepage slope under different action head are obtained. The seepage slope of sand soil foundation of Liuqiao pump station is on the high side, and the seepage stability is not satisfied with the requirement. Seepage problem is a major hidden danger affecting the safe operation of the pump station, so it is necessary to treat the foundation. In order to ensure the normal operation of the Liuqiao pumping station, A closed cutoff wall was installed at the bottom of the pump chamber, and the soil was filled with water in the wall. The seepage of the pump station after the foundation treatment was analyzed by finite element method. The results show that the seepage field distribution has been changed greatly by the impervious wall. The seepage gradient of horizontal section and outlet section is far less than the allowable critical value of seepage gradient, and the Liuqiao pumping station satisfies the requirement of seepage stability. The finite element analysis of the whole Liuqiao pump station with impermeable wall is carried out. The maximum principal tensile stress of pumping station is smaller than the tensile strength of concrete, and the maximum principal compressive stress is less than the compressive strength of concrete. The bottom of the bottom plate of the pump room is in the state of compression, and the stress at the bottom of the side pier of the pump chamber and at the bottom of the middle pier, the contact part between the bottom plate and the impervious wall is very concentrated. The vertical stress distribution in the middle of the bottom plate of the pump chamber is relatively uniform. The local stress values of the bottom plate of the pump chamber and the foundation are far smaller than the allowable bearing capacity of the foundation, which satisfies the requirements. The coefficient of anti-slip stability of the pump room is obviously larger than the allowable value under the three working conditions. Meet the requirement of anti-slip stability.
【學(xué)位授予單位】：揚(yáng)州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TV675;TV223.4

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 顧衛(wèi)東;;堅(jiān)持拆遷以人為本 構(gòu)建安置和諧氛圍[J];小城鎮(zhèn)建設(shè);2012年12期

2 ;[J];;年期

相關(guān)會(huì)議論文 前3條

1 彭龍超;;劉橋斷層水文工程地質(zhì)特征及其支護(hù)[A];礦山地質(zhì)災(zāi)害成災(zāi)機(jī)理與防治技術(shù)研究與應(yīng)用[C];2009年

2 王強(qiáng);曹代勇;;數(shù)值模擬法在劉橋斷層突水風(fēng)險(xiǎn)分析中的應(yīng)用[A];中國(guó)煤炭學(xué)會(huì)礦井地質(zhì)專業(yè)委員會(huì)2007年學(xué)術(shù)論壇論文集[C];2007年

3 王強(qiáng);曹代勇;;數(shù)值模擬法在劉橋斷層突水風(fēng)險(xiǎn)分析中的應(yīng)用[A];中國(guó)煤炭學(xué)會(huì)礦井地質(zhì)專業(yè)委員會(huì)2007年學(xué)術(shù)論壇專輯[C];2007年

相關(guān)重要報(bào)紙文章 前10條

1 蔡洪光 武榮德;西劉橋鄉(xiāng)：工作效率提速 扎實(shí)為民辦事[N];東營(yíng)日?qǐng)?bào);2007年

2 記者 任溢斌　通訊員 郭振軍;劉橋農(nóng)民守著電腦做生意[N];南通日?qǐng)?bào);2008年

3 記者 楊順丕　通訊員 陳容全 王勇;劉橋：高山之巔的鋪路石[N];恩施日?qǐng)?bào);2011年

4 本報(bào)記者 王建喜 特約記者 李建華;湞江區(qū)：解決難題促和諧[N];韶關(guān)日?qǐng)?bào);2008年

5 記者 燕永清　通訊員 徐建亮 張文杰 武榮德;西劉橋鄉(xiāng)奏響科學(xué)發(fā)展主旋律[N];東營(yíng)日?qǐng)?bào);2008年

6 劉長(zhǎng)明;致富不忘回報(bào)桑梓[N];淮南日?qǐng)?bào);2006年

7 劉浩;濉溪縣劉橋鎮(zhèn)塌陷區(qū)搬遷有新招[N];安徽經(jīng)濟(jì)報(bào);2011年

8 馮銘鑫 婁敬菊 趙新銳;加快老區(qū)發(fā)展建設(shè)和諧社會(huì)[N];新鄉(xiāng)日?qǐng)?bào);2006年

9 通訊員魏星 郭振軍 記者趙勇進(jìn);劉橋鎮(zhèn)黨員爭(zhēng)先兌現(xiàn)實(shí)事承諾[N];南通日?qǐng)?bào);2010年

10 西牧林 王巍;林權(quán)改革催生綠色西劉橋[N];東營(yíng)日?qǐng)?bào);2007年

相關(guān)碩士學(xué)位論文 前2條

1 侯婧;劉橋泵站的滲流與結(jié)構(gòu)穩(wěn)定分析[D];揚(yáng)州大學(xué);2015年

2 陳同;基于GIS的劉橋礦區(qū)沉陷水域污染物空間分布特征研究[D];安徽理工大學(xué);2014年

，

本文編號(hào)：1697465