發(fā)布時間：2018-06-24 03:24

  本文選題：鋼管樁 + 施工平臺��； 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：伴隨著長江水運行業(yè)的發(fā)展，內(nèi)河架空直立式框架碼頭得到廣泛應(yīng)用。作為施工碼頭基礎(chǔ)樁基的作業(yè)平臺，水上施工平臺由于其平臺穩(wěn)固安全，使用方便等優(yōu)點得到充分的發(fā)展和應(yīng)用。由于施工平臺為施工臨時結(jié)構(gòu)，它區(qū)別于永久性的構(gòu)筑物，施工平臺在施工期和營運期還受到荷載眾多，因此保障施工平臺安全的運營，對后期碼頭施工極其重要。本文重慶果園港碼頭二期項目為依托，對水上施工平臺展開受力分析，并研究其失穩(wěn)破壞形式和營運期的監(jiān)控方案，這對水上施工平臺的科學(xué)設(shè)計以及保證建成后的營運安全非常重要。本文主要研究內(nèi)容和結(jié)論如下： （1）闡述了重慶果園港碼頭二期施工平臺的施工方法和技術(shù)要點；在此基礎(chǔ)上通過運用MIDAS/Civil有限元軟件建立合理簡化的施工平臺三維有限元模型。并對施工平臺的荷載進行了詳細(xì)的說明，介紹其加載方式。 （2）分別分析了施工平臺在豎向荷載和水平荷載下的受力和變形規(guī)律，結(jié)果表明：在豎向荷載下，鋼管樁承擔(dān)了施工平臺的主要荷載和變形，豎向荷載短暫狀況下作用效應(yīng)組合值不滿足鋼管樁壓桿穩(wěn)定性要求的臨界值；在水平荷載下，施工平臺整體產(chǎn)生側(cè)移、扭轉(zhuǎn)變形，鋼管樁樁底產(chǎn)生最大彎矩、剪力、扭矩、應(yīng)力，，以及隨著水流力的增大，彎矩、剪力、扭矩、應(yīng)力呈現(xiàn)線性增長到快速增長的趨勢。對鋼管樁截面特性對施工平臺的受力影響進行了計算分析，結(jié)果表明彎曲截面系數(shù)是影響平臺最大應(yīng)力的關(guān)鍵參數(shù)，斷面慣性矩是影響平臺最大水平位移的關(guān)鍵參數(shù)。 （3）研究施工平臺的穩(wěn)定性問題，分析了施工平臺的4種主要破壞模式，并探討其破壞機理。針對施工平臺的破壞模式，提出了4種在洪水期或極限荷載下施工平臺的安全保障措施，這對實際工程有極大的幫助作用。 （4）制定施工平臺的監(jiān)控方案，介紹了監(jiān)控內(nèi)容、監(jiān)控方法、監(jiān)控儀器和監(jiān)控頻率等，并分析了監(jiān)控的誤差和影響因素。對施工平臺的監(jiān)控提出了預(yù)警系統(tǒng)，確定其預(yù)警值，編制施工平臺的應(yīng)急響應(yīng)預(yù)案。
[Abstract]:With the development of the Yangtze River water transportation industry, the inland river vertical frame wharf is widely used. As the working platform of the foundation pile foundation of the construction wharf, the water construction platform has been fully developed and applied because of its advantages of stable, safe and easy to use. Because the construction platform is a temporary construction structure, it is different from the permanent structure, the construction platform is also subjected to many loads during the construction period and the operation period, so it is very important to ensure the safe operation of the construction platform, which is very important for the later construction of the wharf. Based on the second phase project of Chongqing Orchard Port, this paper analyzes the stress on the water construction platform, and studies its failure form and monitoring scheme in operation period. This is very important for the scientific design of the platform and the safety of operation after completion. The main contents and conclusions of this paper are as follows: (1) the construction method and technical essentials of the second stage construction platform of Chongqing Orchard Port are expounded; On this basis, a reasonable and simplified 3D finite element model of construction platform is established by using Midas / Civil finite element software. The load of construction platform is explained in detail, and its loading mode is introduced. (2) the law of stress and deformation of construction platform under vertical load and horizontal load are analyzed respectively. The results show that: under vertical load, The steel pipe pile bears the main load and deformation of the construction platform, the combined value of the action effect under the temporary vertical load does not meet the critical value of the stability requirement of the steel pipe pile, and under the horizontal load, the whole construction platform produces lateral displacement and torsional deformation. The maximum bending moment, shear force, torque, stress, and with the increase of flow force, bending moment, shear force, torque and stress increase linearly. The influence of the cross-section characteristics of steel pipe pile on the stress of the construction platform is calculated and analyzed. The results show that the bending section coefficient is the key parameter affecting the maximum stress of the platform. The moment of inertia of the section is the key parameter affecting the maximum horizontal displacement of the platform. (3) the stability of the construction platform is studied and the four main failure modes of the platform are analyzed and the failure mechanism is discussed. In view of the failure mode of the construction platform, four kinds of safety and security measures for the construction platform under flood period or ultimate load are put forward, which are of great help to the actual engineering. (4) the monitoring scheme of the construction platform is formulated. The contents, methods, instruments and frequency of monitoring are introduced, and the error and influencing factors are analyzed. An early warning system is put forward to monitor and control the construction platform, and its early warning value is determined, and the emergency response plan of the construction platform is worked out.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U656.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 胡俊仁，孔科義;瀨溪河鐵路橋基深水大口徑灌注樁及承臺施工經(jīng)驗[J];地質(zhì)與勘探;1995年03期

2 郭波,吳健華,王志仁,黃紹敏;佛開高速公路九江大橋大直徑鉆孔樁施工[J];廣東公路交通;1995年04期

3 馬海君;;宛坪高速公路重陽水庫鋼管樁支撐式水上施工平臺技術(shù)研究[J];甘肅科技;2007年08期

4 李紹衡,劉展瑞;尖山跨海大橋施工簡介[J];廣西交通科技;1998年04期

5 董曾南,王晉軍,陳長植,夏震寰;粗糙床面明渠均勻紊流水力特性[J];中國科學(xué)(A輯 數(shù)學(xué) 物理學(xué) 天文學(xué) 技術(shù)科學(xué));1992年05期

6 解玉洋;利津黃河公路大橋超長細(xì)樁的施工[J];山東交通科技;2000年02期

7 鄧鐵軍,劉永策,張傳舉;丹江口二橋超長深水墩施工技術(shù)研究[J];建筑技術(shù);2005年02期

8 郭莉;水上鋼管施工平臺的受力分析[J];建筑施工;2003年04期

9 連澤平;蕪湖長江大橋深水施工平臺設(shè)計施工[J];橋梁建設(shè);2000年02期

10 肖佳鵬;武漢白沙洲大橋南岸水中墩基礎(chǔ)施工[J];橋梁建設(shè);1999年02期

本文編號：2059789