本文選題：地下供水管線 + 柔性接口　； 參考：《沈陽建筑大學(xué)》2015年碩士論文

【摘要】：地下供水管線遍布人類生活環(huán)境中的每個角落,有人稱之為現(xiàn)代城市的輸血動脈。伴隨大城市現(xiàn)代化進程的快速躍進,人們對于地下供水的需求度越來越高。一旦無法及時供水,就將給各行各業(yè)造成不可挽回的損失。地震正是導(dǎo)致地下供水管線功能失效的最主要原因,歷年來重大地震往往會導(dǎo)致地下供水管線大面積癱瘓,從而引發(fā)災(zāi)后次生問題,例如火災(zāi)、疾病傳播等。因此,提高地下供水管線抗震性能具有重要意義。關(guān)于地下供水管線抗震性能的研究,目前大多關(guān)注在管線管體的破壞方面。但是,地下管線震害調(diào)查資料表明：接口破壞是地下管線震害的主要形式。目前,工程中多采用承插式柔性接口連接地下管線,因此,對柔性接口地下管線抗震性能的研究具有重要的科研和工程意義。本文采用ANSYS有限元軟件對柔性接口地下管線地震響應(yīng)進行研究,為柔性接口地下管線的工藝參數(shù)優(yōu)化、地震失效分析與預(yù)防提供了理論依據(jù)。本文主要研究內(nèi)容和主要研究結(jié)論如下所述�；谟邢拊浖嗀NSYS,建立具有柔性接口地下管線以及周圍土體的數(shù)值模型,該數(shù)值模型由3段9米長管段、2個承插式接口、周圍土體組成,管材為球墨鑄鐵材質(zhì),場地土為Ⅲ類環(huán)境。按照《建筑抗震設(shè)計規(guī)范》中設(shè)防要求,選取El-centro地震波,通過調(diào)整地震波的峰值加速度對土體施加烈度7度地震,并在土體指定位置采用大質(zhì)量法實現(xiàn)地震波的縱波輸入與橫波輸入。此外,通過改變數(shù)值模型參數(shù),對比研究了不同管段長度、管徑、埋深以及地震烈度下的供水管線地震響應(yīng),提出上述因素對柔性接口地下管線抗震性能的影響規(guī)律。(1)地下供水管線主要破壞形式為承插式柔性接口的拔出和管體破裂,通過數(shù)值模擬,提取接口最危險點位移和管體最危險點應(yīng)力的計算數(shù)據(jù),研究結(jié)果表明：III場地土、7度地震情況下,承插式接口最大位移為63mm,發(fā)生部分滲漏現(xiàn)象；管體最大Mises應(yīng)力為78MPa,遠未達到球墨鑄鐵的極限強度,柔性接口極大程度地降低了管體應(yīng)力。(2)管徑對柔性接口地下供水管線的抗震性能具有一定的影響。隨著管徑的增大,管線管體Mises應(yīng)力、承插式接口的拔出位移相應(yīng)降低。因此,與大口徑管線相比,小口徑管線在地震作用下更容易遭到破壞。進行管線抗震設(shè)計時,在滿足其它指標(biāo)要求的情況下,可以考慮將盡量選取大口徑管線,能夠在一定程度上提高管線的抗震性能。(3)埋深對柔性接口地下供水管線的抗震性能具有一定的影響。隨著埋設(shè)深度的增加,管體Mises應(yīng)力、承插式接口的拔出位移相應(yīng)降低。同時考慮到管線鋪設(shè)工作,埋設(shè)深度也不宜過深,應(yīng)在保證安全的前提下,選取適宜的深度進行埋置。(4)管段長度對柔性接口地下供水管線的抗震性能具有一定的影響。隨著管段長度的增加,地下管線總體剛度相應(yīng)增大,這將導(dǎo)致地震作用下的管線管體Mises應(yīng)力、承插式接口的拔出位移相應(yīng)增大。但考慮到地下管線鋪設(shè)過程中的連接工作量,管段長度也不宜過短,內(nèi)徑200mm的地下管線單根管段長度以9m為宜。(5)地震烈度對柔性接口地下供水管線的抗震性能至關(guān)重要。隨著地震烈度的提高,管線管體Mises應(yīng)力、承插式接口的拔出位移急劇增大,管線泄漏的潛在風(fēng)險明顯提高,研究結(jié)果表明：6度地震情況下,管線接口處基本不發(fā)生泄露；7度地震情況下,管線接口處因發(fā)生拔出位移而導(dǎo)致部分泄漏現(xiàn)象；8度地震情況下,管線接口幾乎完全拔出,地下供水管線的輸運功能完全喪失。
[Abstract]:The underground water supply pipeline is all over the human living environment, which is called the blood transfusion artery in the modern city. With the rapid progress of the modernization process in the big cities, the demand for underground water supply is getting higher and higher. Once the water supply is not timely, it will make irreparable loss to all walks of life. The earthquake is the cause of the underground. The main reason for the failure of water supply pipelines is that major earthquakes in the past years often cause large area paralysis of underground water supply pipeline, thus causing secondary problems after disaster, such as fire and disease transmission. Therefore, it is of great significance to improve the seismic performance of underground water supply pipeline. However, the investigation data of the earthquake damage of the underground pipeline shows that the failure of the underground pipeline is the main form of the earthquake damage of the underground pipeline. At present, the underground pipeline is connected with the flexible interface with the flexible interface. Therefore, the research on the seismic performance of the flexible interface underground pipeline has important scientific and engineering significance. This paper adopts the ANSY The seismic response of the underground pipeline with flexible interface is studied by the S finite element software, which provides a theoretical basis for the optimization of the technological parameters of the underground pipeline of the flexible interface, the analysis and prevention of earthquake failure. The main research contents and main conclusions are as follows. Based on the finite element software ANSYS, the underground pipeline with flexible interface and its surrounding is established. The numerical model of soil is composed of 3 sections of 9 meters long tube section, 2 socket interface, surrounding soil body, pipe material as ductile iron material and ground soil type III environment. The El-centro seismic wave is selected according to the requirements of the "code for seismic design of buildings", and the seismic wave peak acceleration is adjusted to apply the intensity of 7 degree earthquake to the soil. The seismic wave input and transverse wave input are realized by the large mass method at the designated soil position. In addition, by changing the parameters of the numerical model, the seismic response of the water supply pipeline with different length, diameter, depth and earthquake intensity is compared and studied. The influence of the above factors on the seismic performance of the flexible interface underground pipeline is proposed. (1) The main failure mode of the lower water supply pipeline is the pulling out of the socket type flexible interface and the rupture of the pipe body. Through numerical simulation, the calculation data of the most dangerous point displacement of the interface and the most dangerous point stress of the pipe body are extracted. The results show that the maximum displacement of the socket type interface is 63mm under the 7 degree earthquake, and the pipe body is the most important. The stress of large Mises is 78MPa, which is far from the ultimate strength of ductile iron, and the flexible interface greatly reduces the stress of the tube. (2) the pipe diameter has a certain influence on the seismic performance of the underground water supply pipeline with flexible interface. With the increase of the pipe diameter, the Mises stress of the pipe pipe and the pull out displacement of the socket type interface are reduced accordingly. Compared with the pipeline, small caliber pipeline is more easily damaged under the earthquake action. When the pipeline seismic design is carried out, the large diameter pipeline can be selected as much as possible to improve the seismic performance of the pipeline to a certain extent. (3) the seismic performance of the underground water supply pipeline with the flexible interface is one of the most important. With the increase of the buried depth, the Mises stress of the pipe body and the pull out displacement of the socket interface are reduced accordingly. Considering the pipeline laying work, the buried depth should not be too deep, and the suitable depth should be selected under the premise of ensuring safety. (4) the seismic performance of the pipe length to the underground water supply pipeline of the flexible interface is of great importance. With the increase of the length of the pipe section, the overall stiffness of the underground pipeline increases correspondingly. This will lead to the Mises stress of the pipeline body under the earthquake action, and the pull out displacement of the socket interface increases accordingly. But considering the connection workload in the laying process of the underground pipeline, the length of the pipe section should not be too short, and the inner diameter of the underground pipeline is 200mm single pipe. The length of the section is 9m. (5) the earthquake intensity is very important to the seismic performance of the underground water supply pipeline with flexible interface. With the enhancement of the earthquake intensity, the Mises stress of the pipe pipe body, the pulling displacement of the socket type interface increases sharply, and the potential risk of the pipeline leakage is obviously improved. The research results show that the pipeline interface is basically not under the condition of 6 degree earthquake. Leakage occurred. In the case of 7 degree earthquake, partial leakage occurred at the pipeline interface due to the occurrence of pull out displacement. In the case of 8 degree earthquake, the pipeline interface was almost completely pulled out, and the transport function of the underground water supply pipeline was completely lost.
【學(xué)位授予單位】：沈陽建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU991.33

【相似文獻】

相關(guān)期刊論文 前10條

1 張玉姝;;供水管線遷移施工中的幾個問題[J];黑龍江科技信息;2008年25期

2 傅天愉;;關(guān)于做好供水管線檔案采集工作的思考[J];辦公室業(yè)務(wù);2014年01期

3 李濤;;關(guān)于妥善處理破壞供水管線行為的應(yīng)對思考[J];現(xiàn)代企業(yè)教育;2012年05期

4 駱黎斌;;短訊[J];城鎮(zhèn)供水;2006年02期

5 徐廣超;;關(guān)于如何防御供水管線爆、漏的對策[J];廣東建材;2007年09期

6 張亞生;張麗莎;郝占齊;;供水管線導(dǎo)向穿越新技術(shù)應(yīng)用[J];中國水運(下半月);2008年04期

7 潘軍剛;宋玉田;;高校地下供水管線維修存在的問題與對策[J];山西建筑;2009年24期

8 周素蘭;;對仙居縣供水管線檔案管理的一些思考[J];山西建筑;2010年35期

9 季秀華;張麗麗;;淺談供水管線并網(wǎng)施工中常見問題[J];科技與企業(yè);2012年18期

10 付茂全;;同煤集團供水管線地理信息系統(tǒng)初步設(shè)計[J];同煤科技;2013年04期

相關(guān)會議論文 前2條

1 段松林;賴可堅;劉建平;;坦桑尼亞達累斯薩拉姆供水管線跨海段施工[A];機械疏浚專業(yè)委員會第二十次疏浚與吹填技術(shù)經(jīng)驗交流會論文與技術(shù)經(jīng)驗總結(jié)文集[C];2007年

2 徐海旭;;非開挖鉆進技術(shù)在供水管線施工中的應(yīng)用[A];2010年全國給水排水技術(shù)信息網(wǎng)年會論文集[C];2010年

相關(guān)重要報紙文章 前10條

1 曉周 樹桐;建設(shè)路供水管線改造全面竣工[N];唐山勞動日報;2007年

2 記者 李小偉;管線挖斷 哈群力三千戶居民斷水[N];黑龍江經(jīng)濟報;2011年

3 通訊員 張玄;下穿2600毫米供水管線“零”沉降[N];首都建設(shè)報;2014年

4 本報記者 夏暉;400公里供水管線“穿”內(nèi)襯[N];首都建設(shè)報;2014年

5 王小兵、熊艷艷、單宇;過唐河段4條供水管線改造工程順利完工[N];唐山勞動日報;2010年

6 記者 蔡鈺 通訊員 駱黎斌;改造管線保障奧運供水安全[N];首都建設(shè)報;2008年

7 記者 彭躍東;近10萬居民將告別吃水難[N];沈陽日報;2011年

8 唐悅;我省明年底完成 2800公里供水管線改造[N];新華日報;2006年

9 肖長明;全力打造和諧供水局面[N];通化日報;2007年

10 駱黎斌;首都供水生命線的守護人[N];首都建設(shè)報;2010年

相關(guān)博士學(xué)位論文 前1條

1 周靜海;地下供水管線破壞試驗及抗震分析[D];大連理工大學(xué);2010年

相關(guān)碩士學(xué)位論文 前1條

1 張多;地下供水管線抗震性能分析[D];沈陽建筑大學(xué);2015年

，

本文編號：2035476