本文選題：水文分析　切入點(diǎn)：波浪計(jì)算　出處：《華南理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：論文結(jié)合珠海市兩個(gè)規(guī)模較大的堤圍工程項(xiàng)目，對濱海河網(wǎng)地區(qū)堤圍工程關(guān)鍵技術(shù)問題開展研究。目前在濱海河網(wǎng)地區(qū)堤圍工程的設(shè)計(jì)和施工中仍存在著一些亟需解決的技術(shù)問題，對于這些問題簡單引用規(guī)范會(huì)造成與實(shí)際不符。為了探索解決這些問題的方法，論文主要做了以下工作： （1）采用廣義極值分布對考慮了歷史性高潮位的白蕉潮位站潮（水）位觀測資料進(jìn)行擬合，結(jié)果表明廣義極值分布對于極端水文事件具有一定的適應(yīng)性。通過對竹銀潮位站的潮（水）位資料與上游洪水和下游河口處的潮位進(jìn)行遭遇分析研究，認(rèn)為可以采用Copula函數(shù)求出潮（水）位和上游洪水及下游河口處潮位的聯(lián)合分布，來進(jìn)行洪潮遭遇的定量分析。 （2）設(shè)計(jì)正交試驗(yàn)對波浪爬高影響因素的敏感性進(jìn)行分析。根據(jù)波浪爬高的形成機(jī)理，基于敏感性分析的結(jié)果，與常用的計(jì)算方法作對比，認(rèn)為進(jìn)行該種情況的波浪爬高計(jì)算時(shí)，不僅要計(jì)算堤線法向上的波浪爬高，還應(yīng)驗(yàn)算其它風(fēng)向上的波浪爬高。這種計(jì)算方法不僅具有理論基礎(chǔ)，而且計(jì)算結(jié)果更符合工程實(shí)際情況，具有一定的應(yīng)用價(jià)值。 （3）通過比較不同迎水坡坡比和寬度、高度不同的消浪平臺(tái)對波浪爬高的影響，采用極限平衡法對幾種常用堤型的穩(wěn)定性進(jìn)行分析，采用有限元法對幾種常用堤型的沉降變形進(jìn)行分析，從力學(xué)穩(wěn)定角度歸納總結(jié)了幾種常用堤型的優(yōu)缺點(diǎn)和適用性，結(jié)合實(shí)際工程闡明進(jìn)行堤型比選和堤身結(jié)構(gòu)設(shè)計(jì)的方法。 （4）分析了拋石擠淤法、排水固結(jié)法、水泥攪拌樁法等三種常用淤泥地基處理方法的原理。結(jié)合工程實(shí)例介紹了拋石擠淤法和排水固結(jié)法的具體設(shè)計(jì)方法，采用極限平衡法和有限元法分析了這兩種方法對淤泥地基的處理效果，總結(jié)了這兩種方法的優(yōu)缺點(diǎn)和適用性。另外還采用極限平衡法分析了水泥攪拌樁的樁距和樁長對堤基穩(wěn)定性的影響，采用有限元法分析了水泥攪拌樁的樁距和樁長對堤基沉降變形的影響，分析結(jié)果表明通過減小樁距和增加樁長可以提高堤圍的穩(wěn)定性和降低堤基的沉降量，但隨著樁距的減小和樁長的增加，，堤圍穩(wěn)定性的增加趨勢和堤基沉降量的減小趨勢趨緩。 （5）基于國內(nèi)外學(xué)者對河網(wǎng)水流流態(tài)特征的研究成果，對河網(wǎng)地區(qū)發(fā)生崩岸的工程實(shí)例進(jìn)行分析，分析結(jié)果表明河道主支流交匯處及河道分汊口處的堤岸容易受到淘刷引發(fā)崩岸。另外對潮汐作用對崩岸的影響進(jìn)行了分析，認(rèn)為落潮會(huì)對堤岸的穩(wěn)定性產(chǎn)生不利影響。因此，對于容易發(fā)生崩岸的堤圍工程，應(yīng)合理設(shè)計(jì)拋石護(hù)岸措施以保證堤圍的穩(wěn)定性。 論文對濱海河網(wǎng)地區(qū)堤圍工程關(guān)鍵技術(shù)問題進(jìn)行了研究，提出在實(shí)際工程中解決這些問題的方法，為類似工程的設(shè)計(jì)和施工作參考。
[Abstract]:Combined with two large scale embankment engineering projects in Zhuhai, The key technical problems of embankment engineering in coastal river network area are studied. At present, there are still some technical problems that need to be solved in the design and construction of embankment engineering in coastal river network area. Simply referring to the specification for these problems will cause inconsistency with the practice. In order to explore the solution to these problems, the thesis mainly does the following work:. 1) using the generalized extreme value distribution to fit the tidal (water) observation data of the Canna plantain tidal level station considering the historical orgasm. The results show that the generalized extreme value distribution is suitable for extreme hydrological events. It is considered that the Copula function can be used to calculate the joint distribution of tidal level, upstream flood level and tidal level at the downstream estuary, so as to carry out the quantitative analysis of the flood tide encounter. 2) Design orthogonal test to analyze the sensitivity of the factors affecting wave climbing. According to the formation mechanism of wave climbing, and based on the results of sensitivity analysis, compared with the commonly used calculation methods, it is considered that in the case of wave climbing calculation, It is necessary not only to calculate the upward wave climb of the dike line, but also to check the wave climb in other wind directions. This method not only has a theoretical basis, but also the calculated results are more in line with the actual engineering situation and have certain application value. 3) by comparing the influence of different slope ratio, width and height on wave climbing, the stability of several common embankments is analyzed by using limit equilibrium method. The settlement and deformation of several commonly used embankments are analyzed by finite element method. The advantages, disadvantages and applicability of several common embankment types are summarized from the point of view of mechanical stability. Combined with practical engineering, the methods of embankment type comparison and embankment structure design are expounded. This paper analyzes the principles of three common treatment methods of silt foundation, such as riprap squeezing method, drainage consolidation method and cement mixing pile method, and introduces the concrete design methods of riprap squeezing silt method and drainage consolidation method in combination with engineering examples. The limit equilibrium method and the finite element method are used to analyze the treatment effect of these two methods to the silt foundation. The advantages and disadvantages and applicability of these two methods are summarized. In addition, the influence of pile spacing and pile length of cement mixing pile on the stability of embankment is analyzed by using limit equilibrium method. The influence of pile spacing and pile length of cement mixing pile on the settlement and deformation of embankment is analyzed by using finite element method. The results show that the stability of embankment circumference can be improved and the settlement of embankment can be reduced by reducing pile spacing and increasing pile length. However, with the decrease of pile spacing and the increase of pile length, the increasing trend of embankment stability and the decreasing trend of foundation settlement decrease. 5) based on the research achievements of domestic and foreign scholars on the characteristics of water flow in river network, an engineering example of bank collapse in river network area is analyzed. The results show that the embankment at the junction of the main tributary and the branch of the river is vulnerable to bank collapse caused by scouring and brushing. In addition, the effect of tidal action on the bank collapse is analyzed, and it is concluded that the falling tide will have a negative effect on the stability of the embankment. In order to ensure the stability of the embankment, it is necessary to design the measures of riprap bank protection for the embankment engineering which is prone to bank collapse. In this paper, the key technical problems of embankment engineering in coastal river network area are studied, and the methods to solve these problems in practical engineering are put forward, which can be used as a reference for the design and construction of similar projects.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U655.5

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