PHC樁—重力式擋墻復(fù)合結(jié)構(gòu)在碼頭改造工程中的應(yīng)用
發(fā)布時(shí)間：2018-10-23 16:43
【摘要】：碼頭結(jié)構(gòu)加固與改造是通過對在役老碼頭進(jìn)行檢測、評估、加固及改造等技術(shù)措施,恢復(fù)受損碼頭結(jié)構(gòu)的原有功能并滿足其使用要求,或者提高已有碼頭結(jié)構(gòu)的承載力和穩(wěn)定性以滿足結(jié)構(gòu)荷載增加及使用功能改變等要求。隨著一批老碼頭達(dá)到設(shè)計(jì)使用年限,以及船舶大型化、專業(yè)化發(fā)展趨勢迅猛,我國港口工程即將進(jìn)入大規(guī)模的碼頭結(jié)構(gòu)加固改造時(shí)期。然而,目前國內(nèi)對碼頭結(jié)構(gòu)加固改造的研究較少,尤其是PHC樁-重力式擋墻復(fù)合結(jié)構(gòu)碼頭加固改造的設(shè)計(jì)理論和計(jì)算方法遠(yuǎn)落后于工程實(shí)踐。本文利用理論分析和有限元數(shù)值模擬方法針對PHC樁-重力式擋墻復(fù)合結(jié)構(gòu)加固與改造技術(shù)開展了一系列研究工作,主要研究內(nèi)容和結(jié)論如下:1、分析了碼頭結(jié)構(gòu)加固改造的研究現(xiàn)狀及應(yīng)用前景,找出目前研究中亟待解決的關(guān)鍵問題,并通過分析指出碼頭結(jié)構(gòu)加固改造是十分必要并且可行的。2、根據(jù)PHC樁-重力式擋墻復(fù)合結(jié)構(gòu)在極限狀態(tài)下的受力平衡,建立了基于混凝土重力式擋墻結(jié)構(gòu)穩(wěn)定性驗(yàn)算模式的抗滑移、抗傾覆穩(wěn)定性簡化計(jì)算方法;同時(shí)在現(xiàn)有規(guī)范的穩(wěn)定性計(jì)算方法基礎(chǔ)上推導(dǎo)出適用于樁基-重力式擋墻復(fù)合結(jié)構(gòu)的規(guī)范修正法。3、利用有限元法對PHC樁-重力式擋墻復(fù)合結(jié)構(gòu)進(jìn)行分析,以Robot Structural有限元分析軟件為平臺,建立了復(fù)合結(jié)構(gòu)的二維彈塑性有限元模型,主要包括結(jié)構(gòu)及土體本構(gòu)模型的選取、接觸面的模擬、計(jì)算域的選取、邊界條件的定義及網(wǎng)格劃分等關(guān)鍵問題。4、以佛山中外運(yùn)倉碼有限公司碼頭結(jié)構(gòu)加固改造工程為工程實(shí)例,根據(jù)工程條件和設(shè)計(jì)要求將原重力式擋墻結(jié)構(gòu)加固改造成PHC樁-重力式擋墻復(fù)合結(jié)構(gòu),并分別利用本文提出的穩(wěn)定性計(jì)算方法和有限元數(shù)值模擬方法對加固改造前后的碼頭結(jié)構(gòu)進(jìn)行分析計(jì)算。分析結(jié)果表明PHC樁-重力式擋墻復(fù)合結(jié)構(gòu)受力明確,兩種結(jié)構(gòu)型式能夠很好地協(xié)同工作、共同受力,通過增加樁基能夠有效減小碼頭結(jié)構(gòu)的位移、應(yīng)力和底部滑移,顯著提高碼頭結(jié)構(gòu)的穩(wěn)定性和承載力。
[Abstract]:The reinforcement and reconstruction of the structure of the wharf is to restore the original function of the damaged wharf structure and meet the requirements of its use through the technical measures such as inspection, evaluation, reinforcement and reconstruction of the existing old wharf in service. Or to improve the bearing capacity and stability of the existing wharf structure to meet the requirements of structural load increase and function change. With a lot of old wharves reaching the design life, as well as large-scale ships, the trend of professional development is swift and violent, the port engineering in China is about to enter the period of large-scale wharf structure reinforcement and transformation. However, there are few researches on the reinforcement and reconstruction of wharf structure at present, especially the design theory and calculation method of PHC pile-gravity retaining wall composite structure wharf reinforcement and reconstruction lags far behind the engineering practice. In this paper, theoretical analysis and finite element numerical simulation method are used to carry out a series of research work on the reinforcement and reconstruction technology of PHC pile-gravity retaining wall composite structure. The main research contents and conclusions are as follows: 1. The present research situation and application prospect of wharf structure reinforcement and reconstruction are analyzed, and the key problems to be solved in the present research are found out. Through analysis, it is pointed out that it is very necessary and feasible to strengthen the wharf structure. 2. According to the stress balance of PHC pile-gravity retaining wall composite structure under the limit state, A simplified calculation method of anti-slip and anti-overturning stability is established based on the checking model of the stability of concrete gravity retaining wall. At the same time, on the basis of the stability calculation methods of the existing codes, a modified method for the composite structure of pile-gravity retaining wall is derived. 3. The finite element method is used to analyze the composite structure of PHC pile-gravity retaining wall. A two-dimensional elastic-plastic finite element model of composite structure is established on the platform of Robot Structural software. It mainly includes the selection of constitutive model of structure and soil, the simulation of contact surface and the selection of calculation domain. The definition of boundary conditions and the key problems such as grid division. 4. Taking the project of strengthening and rebuilding wharf structure of Foshan Sinotrans Warehouse Code Co., Ltd., as an engineering example, According to the engineering conditions and design requirements, the original gravity retaining wall structure was strengthened and transformed into PHC pile-gravity retaining wall composite structure. The stability calculation method and finite element numerical simulation method proposed in this paper are used to analyze and calculate the wharf structure before and after reinforcement. The analysis results show that the PHC pile-gravity retaining wall composite structure has a clear force, the two types of structure can work together well, and the pile foundation can effectively reduce the displacement, stress and bottom slip of the wharf structure by increasing the pile foundation. The stability and bearing capacity of wharf structure are improved significantly.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U657
本文編號：2289863
[Abstract]:The reinforcement and reconstruction of the structure of the wharf is to restore the original function of the damaged wharf structure and meet the requirements of its use through the technical measures such as inspection, evaluation, reinforcement and reconstruction of the existing old wharf in service. Or to improve the bearing capacity and stability of the existing wharf structure to meet the requirements of structural load increase and function change. With a lot of old wharves reaching the design life, as well as large-scale ships, the trend of professional development is swift and violent, the port engineering in China is about to enter the period of large-scale wharf structure reinforcement and transformation. However, there are few researches on the reinforcement and reconstruction of wharf structure at present, especially the design theory and calculation method of PHC pile-gravity retaining wall composite structure wharf reinforcement and reconstruction lags far behind the engineering practice. In this paper, theoretical analysis and finite element numerical simulation method are used to carry out a series of research work on the reinforcement and reconstruction technology of PHC pile-gravity retaining wall composite structure. The main research contents and conclusions are as follows: 1. The present research situation and application prospect of wharf structure reinforcement and reconstruction are analyzed, and the key problems to be solved in the present research are found out. Through analysis, it is pointed out that it is very necessary and feasible to strengthen the wharf structure. 2. According to the stress balance of PHC pile-gravity retaining wall composite structure under the limit state, A simplified calculation method of anti-slip and anti-overturning stability is established based on the checking model of the stability of concrete gravity retaining wall. At the same time, on the basis of the stability calculation methods of the existing codes, a modified method for the composite structure of pile-gravity retaining wall is derived. 3. The finite element method is used to analyze the composite structure of PHC pile-gravity retaining wall. A two-dimensional elastic-plastic finite element model of composite structure is established on the platform of Robot Structural software. It mainly includes the selection of constitutive model of structure and soil, the simulation of contact surface and the selection of calculation domain. The definition of boundary conditions and the key problems such as grid division. 4. Taking the project of strengthening and rebuilding wharf structure of Foshan Sinotrans Warehouse Code Co., Ltd., as an engineering example, According to the engineering conditions and design requirements, the original gravity retaining wall structure was strengthened and transformed into PHC pile-gravity retaining wall composite structure. The stability calculation method and finite element numerical simulation method proposed in this paper are used to analyze and calculate the wharf structure before and after reinforcement. The analysis results show that the PHC pile-gravity retaining wall composite structure has a clear force, the two types of structure can work together well, and the pile foundation can effectively reduce the displacement, stress and bottom slip of the wharf structure by increasing the pile foundation. The stability and bearing capacity of wharf structure are improved significantly.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U657
【參考文獻(xiàn)】
相關(guān)期刊論文 前4條
1 蔣建平;路倬;高廣運(yùn);;板樁碼頭浚深改造方案研究[J];應(yīng)用基礎(chǔ)與工程科學(xué)學(xué)報(bào);2011年02期
2 張鑫;李安起;趙考重;;建筑結(jié)構(gòu)鑒定與加固改造技術(shù)的進(jìn)展[J];工程力學(xué);2011年01期
3 馮海波;曾建輝;;格形鋼板樁碼頭結(jié)構(gòu)加固改造方案研究──廣州港新沙港區(qū)~#2,~#3泊位碼頭前沿水域浚深方案設(shè)計(jì)[J];水運(yùn)工程;2010年06期
4 孫光圻;吳相軍;;《全國沿海港口布局規(guī)劃》的編制背景與實(shí)施意義[J];水運(yùn)管理;2007年01期
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