本文選題：給水管道 + 安全評價��； 參考：《中國地質大學(北京)》2017年碩士論文

【摘要】：我國埋地給水管管材有鋼管、鑄鐵管、鋼塑復合管以及小口徑塑料管等。很多管道為城市建設之初敷設的,隨著使用年限的增加,給水管發(fā)生老化等造成管網(wǎng)嚴重漏損。同時由于城市地下工程施工帶來的干擾,如地鐵施工,地下管廊施工、地下管道工程和基坑施工等,導致地下給水管事故頻頻發(fā)生,主要包括:水錘引起的管道破裂、塑料管道的接口漏水以及金屬管道的腐蝕、結垢等嚴重影響城市給水系統(tǒng)的安全性。為了維持管網(wǎng)的正常運行,保證城市安全供水,就必須有效的掌握給水管線的安全狀況,從而做好管網(wǎng)的管理工作。因此,如何動態(tài)評價給水管道的狀態(tài),從而采取相應的對策加固,就顯得十分重要。目前,針對給水管道進行符合我國國情的評價軟件的研究并不多。通過管道評價軟件,幫助管網(wǎng)管理者對供水管網(wǎng)進行科學管理。本文的主要研究內(nèi)容主要包括:(1)聚乙烯管道安全判斷準則:從聚乙烯管道的強度、變形及穩(wěn)定性三方面討論了不同失效準則的適用性、參數(shù)計算模型、預計使用壽命,以及影響其安全性的因素。(2)鑄鐵管道安全判斷準則:從鑄鐵管道的強度、變形及穩(wěn)定性三方面歸納了失效準則、參數(shù)計算模型,環(huán)向和軸向應力參數(shù)計算,還特別考慮了冰凍荷載的影響,以及對接口轉角的限制。(3)鋼質管道安全判斷準則:從鋼管的強度、變形及穩(wěn)定性三方面歸納了失效準則,討論了參數(shù)計算模型。并結合工程實例進行了這三方面的詳細計算,驗證了判斷失效理論的實用性。(4)設計了PE以及鑄鐵管給水管道結構破壞計算與驗算程序:通過輸入管道彈性模量、土體的變形模量、管徑大小、壁厚以及覆土深度等基礎數(shù)據(jù),根據(jù)前文相應管材的參數(shù)計算模型,計算出管道受力情況包括環(huán)向和軸向等,驗證了前述判斷準則的實用性。通過軟件判斷管道的狀態(tài),可快速掌握地下管線的安全情況。
[Abstract]:There are steel pipe, cast iron pipe, steel-plastic composite pipe and small diameter plastic pipe in our country. Many pipelines are laid at the beginning of urban construction. At the same time, because of the interference brought by the construction of urban underground engineering, such as subway construction, underground pipe gallery construction, underground pipeline engineering and foundation pit construction, underground water pipe accidents occur frequently, mainly including: water hammer caused pipeline rupture, The leakage of plastic pipe interface and corrosion and scaling of metal pipe seriously affect the safety of urban water supply system. In order to maintain the normal operation of the pipe network and ensure the safe water supply in the city, it is necessary to effectively grasp the safety condition of the water supply pipeline line, so as to manage the pipe network well. Therefore, it is very important to evaluate the state of water supply pipeline dynamically and take corresponding countermeasures to reinforce it. At present, there are few researches on the evaluation software of water supply pipeline in accordance with the national conditions of our country. Through the pipeline evaluation software, help the pipe network manager to carry on the scientific management to the water supply network. The main research contents of this paper are as follows: (1) the criteria for judging the safety of polyethylene pipeline: the applicability of different failure criteria, the calculation model of parameters, and the estimated service life are discussed from three aspects of strength, deformation and stability of polyethylene pipeline. And the factors affecting the safety of cast iron pipeline: the failure criterion, parameter calculation model, circumferential stress parameter calculation and axial stress parameter calculation are summarized from the strength, deformation and stability of cast iron pipeline. In particular, the influence of freezing load and the limitation of interface angle on the safety of steel pipeline are considered. The failure criteria are summarized from the strength, deformation and stability of the steel pipe, and the calculation model of parameters is discussed. Combined with engineering examples, the detailed calculation of these three aspects is carried out, and the practicability of judging failure theory is verified. (4) A program for calculating and checking the structural failure of PE and cast iron pipe feedwater pipeline is designed: the elastic modulus of the pipe is input, Based on the basic data of soil deformation modulus, pipe diameter, wall thickness and the depth of overlying soil, according to the calculation model of the parameters of the corresponding pipe in the previous paper, the stress situation of the pipeline is calculated, including the circumferential and axial directions, which verifies the practicability of the above criterion. The safe condition of underground pipeline can be quickly grasped by software judging the state of pipeline.
【學位授予單位】：中國地質大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU991.36
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本文編號：1841622