本文關(guān)鍵詞：地下室外墻單面模板支撐體系研究與應(yīng)用　出處：《重慶大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 單面模板支撐體系 組成與構(gòu)造 計(jì)算理論 有限元屈曲分析 影響因素

【摘要】：隨著我國(guó)城市化進(jìn)程的加快，城市用地日趨緊張，基坑沿地下室外墻邊線開(kāi)挖的情況已經(jīng)屢見(jiàn)不鮮。在地下室外墻外邊線無(wú)模板支撐工作面的情況下，只能采用單面支模的形式。單面支模的搭設(shè)材料主要有型鋼剛架和扣件式鋼管支架兩種，本文研究的扣件式單面模板支撐體系屬于后者。 扣件式鋼管腳手架引入我國(guó)使用已逾40年，因其具有搭設(shè)方便、成本較低、通用性和適用性強(qiáng)等優(yōu)點(diǎn)，得到了廣泛的應(yīng)用。我國(guó)JGJ130-2011《建筑施工扣件式鋼管腳手架安全技術(shù)規(guī)范》中并沒(méi)有對(duì)承受側(cè)向壓力的單面模板提出相應(yīng)規(guī)定與指導(dǎo)建議，因此本文以扣件式單面模板支撐體系為研究對(duì)象，希望對(duì)類似工程有一定的借鑒與指導(dǎo)意義。論文主要包括以下幾個(gè)方面的內(nèi)容： ①通過(guò)2013年多起模板支撐倒塌事故分析，指出計(jì)算方法不合理、構(gòu)配件管理不到位和施工管理不到位等因素是造成模板支撐體系坍塌事故的主要誘因。 ②對(duì)比單面支模與雙面支模的特點(diǎn)，并對(duì)單面支模體系的常見(jiàn)形式進(jìn)行了圖文說(shuō)明，提出扣件式鋼管斜撐三角架這一較為經(jīng)濟(jì)、靈活的搭設(shè)方案。描述了支撐體系的組成與構(gòu)造措施。 ③闡述了我國(guó)、英國(guó)、美國(guó)相應(yīng)規(guī)范對(duì)新澆混凝土側(cè)壓力值計(jì)算式的相關(guān)規(guī)定；對(duì)我國(guó)、英國(guó)、日本的壓桿臨界力計(jì)算公式進(jìn)行了對(duì)比與總結(jié)；基于我國(guó)腳手架發(fā)展中的鉸接模型、排架模型、剛框架模型，推導(dǎo)了半剛性有側(cè)移框架的壓桿計(jì)算長(zhǎng)度計(jì)算表達(dá)式；同時(shí)為便于工程實(shí)用，推導(dǎo)了多彈性支座多節(jié)間連續(xù)壓桿的計(jì)算模型、計(jì)算方法及臨界力表達(dá)式。 ④采用MIDAS/Gen有限元分析軟件對(duì)單面模板支撐體系進(jìn)行三維有限元屈曲分析。確定了工程實(shí)例中單面模板支撐架的薄弱部位，同時(shí)也指出地錨是施工時(shí)應(yīng)嚴(yán)格控制的關(guān)鍵點(diǎn)。 ⑤指出構(gòu)配件的初始缺陷、搭設(shè)初始條件、構(gòu)造措施等是影響單面模板支撐體系承載力的主要因素，，并對(duì)施工時(shí)構(gòu)配件選擇與檢測(cè)、混凝土澆筑方式、薄弱部位的加強(qiáng)等方面提出了相應(yīng)建議。
[Abstract]:With the rapid urbanization of our country , the urban land becomes more and more tense , and the excavation of the foundation pit along the outer wall of the basement has been uncommon . In the case of no formwork support working surface of the outer side of the basement exterior wall , only one side formwork can be used . The erection material of the single - side formwork is mainly composed of steel frame and fastener type steel pipe support . The fastener type single - side formwork support system is the latter . Fastener - type steel tube scaffold has been introduced in our country for more than 40 years because it has the advantages of convenient erection , low cost , strong versatility and applicability . ( 1 ) Through the analysis of the collapse accident caused by multiple formwork support in 2013 , it is pointed out that the calculation method is unreasonable , the failure of the component management is not in place and the construction management is not in place , etc . , the main cause of the collapse accident of the formwork support system is caused . In this paper , the characteristics of single - side formwork and double - sided formwork are compared , and the common form of single - side formwork system is illustrated . This paper puts forward a more economical and flexible setting scheme for the diagonal bracing tripod of the fastener - type steel tube . In this paper , the formulas for calculating the lateral pressure values of new - in - place concrete in China , Britain and the United States are described . The formulas for calculating the critical force of the pressure bars in China , England and Japan are compared and summarized . Based on the hinge model , the rack model and the rigid frame model in the development of scaffold in China , the calculation expression of the calculation length of the pressing rods with the semi - rigid side - moving frame is derived ; meanwhile , the calculation model , calculation method and critical force expression of the multi - elastic support multi - joint continuous pressure rod are deduced for the convenience of engineering . ( 4 ) Using MIDAS / Gen finite element analysis software to analyze the three - dimensional finite element buckling analysis of single - side formwork support system . The weak parts of single - side formwork support frame in engineering example are determined , and the key points that should be strictly controlled during construction are also pointed out . It is pointed out that the initial defects , initial conditions , structural measures and so on are the main factors which influence the bearing capacity of single - side formwork support system , and the corresponding suggestions are put forward in the aspects of the selection and detection of the components during construction , the concrete pouring method and the strengthening of weak points .

【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU755.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫作功,應(yīng)惠清,王行德;基于滿堂腳手架的可靠性設(shè)計(jì)[J];廣西工學(xué)院學(xué)報(bào);2003年01期

2 胡長(zhǎng)明;葛召深;王麗芳;沈勤;;扣件式鋼管模板支架靜壓變形特性的試驗(yàn)研究[J];工業(yè)建筑;2010年02期

3 于清緣;陳立中;;借鑒國(guó)外發(fā)展經(jīng)驗(yàn) 減少我國(guó)腳手架工程事故[J];工業(yè)建筑;2011年01期

4 徐崇寶;張鐵錚;潘景龍;黃寶魁;陸聚東;;雙排扣件式鋼管腳手架工作性能的理論分析與實(shí)驗(yàn)研究[J];哈爾濱建筑工程學(xué)院學(xué)報(bào);1989年02期

5 劉紅波;陳志華;王小盾;劉群;;有剪刀撐扣件式鋼管模板支架簡(jiǎn)化計(jì)算方法[J];土木建筑與環(huán)境工程;2011年04期

6 謝其盛;金國(guó)光;王月?tīng)N;;我國(guó)建筑腳手架現(xiàn)狀及其發(fā)展方向[J];建筑機(jī)械化;2006年09期

7 李維濱,劉桐 ,郭正興;扣件式鋼管模板支架安全性研究與施工建議[J];建筑技術(shù);2004年08期

8 王旭峰;劉繼文;;從地鐵橋墩立柱模板坍塌事故分析探討混凝土側(cè)壓力值[J];建筑技術(shù);2009年08期

9 徐鴻斌;;超高超厚地下室外墻單面模板施工技術(shù)[J];建筑施工;2006年02期

10 陳榮春;朱靖;欒海林;;組合式三角架單側(cè)支模技術(shù)的應(yīng)用[J];建筑安全;2010年01期

本文編號(hào)：1382933