本文選題：大體積混凝土 + 高層建筑厚底板�。� 參考：《湖北工業(yè)大學(xué)》2017年碩士論文

【摘要】：現(xiàn)代的城市化建設(shè)步伐逐漸加快,我國(guó)的建筑行業(yè)正在不斷的發(fā)展壯大中,施工質(zhì)量等受到越來越多的重視,特別是對(duì)于混凝土質(zhì)量的要求越來越高。就高層建筑而言,底板作為其關(guān)鍵部位,擁有著重要的功能和作用,所以底板混凝土質(zhì)量就變得尤為重要,特別是厚底板大體積混凝土。本次研究主要是針對(duì)高層建筑底板大體積混凝土的裂縫控制進(jìn)行的,結(jié)合其結(jié)構(gòu)特點(diǎn),從混凝土配合比優(yōu)化、結(jié)構(gòu)施工技術(shù)、施工過程控制及養(yǎng)護(hù)措施等方面入手,深入分析厚底板大體積混凝土裂縫形成機(jī)理和防治措施,進(jìn)而有效的對(duì)厚底板大體積混凝土裂縫控制的施工技術(shù)加以掌握,增加未來施工的實(shí)踐經(jīng)驗(yàn)。第一,本文根據(jù)混凝土裂縫理論,對(duì)混凝土裂縫的形成原因進(jìn)行了分析,并結(jié)合溫度應(yīng)力理論,介紹與論述了溫度應(yīng)力及應(yīng)變對(duì)混凝土裂縫形成的影響。第二,本文結(jié)合裂縫形成的原因以及溫度應(yīng)力對(duì)混凝土裂縫的影響,深入分析混凝土裂縫的預(yù)防措施,從溫度的變化控制、配合比的控制、養(yǎng)護(hù)措施的控制等方面論述了如何預(yù)防混凝土裂縫形成。第三,本文對(duì)高層建筑厚底板大體積混凝土的特點(diǎn)進(jìn)行了闡述,并結(jié)合裂縫的形成與控制的分析結(jié)果,從模板、鋼筋、混凝土等不同施工環(huán)節(jié)入手,對(duì)其施工特征和技術(shù)加以分析。第四,本文將北京城建-世華泊郡小區(qū)底板大體積混凝土的施工情況作為主要案例,并結(jié)合裂縫成因分析和預(yù)防措施分析,分別闡述混凝土配合比的優(yōu)化、混凝土出機(jī)溫度的控制、冷卻系統(tǒng)的布置、混凝土的泵送與澆筑技術(shù)、大體積混凝土內(nèi)部溫度的監(jiān)測(cè)控制與后期養(yǎng)護(hù)等相關(guān)施工技術(shù)措施。通過大體積混凝土裂縫控制實(shí)施效果表明,關(guān)于大體積混凝土的裂縫控制,上述措施是切實(shí)可行的,并取得了良好的效果,同時(shí)大體積混凝土溫度裂縫控制技術(shù)措施是科學(xué)、規(guī)范的。
[Abstract]:The pace of the construction of modern urbanization is speeding up gradually, the construction industry of our country is developing constantly, the construction quality and so on are paid more and more attention, especially the demand for the quality of concrete is more and more high. As the key part of high-rise building, the bottom slab has important function and function, so the quality of floor concrete becomes more and more important, especially the mass concrete of thick floor. This research is mainly aimed at crack control of mass concrete of floor slab of high-rise building, combining with its structural characteristics, starting with optimization of concrete mix ratio, structure construction technology, construction process control and maintenance measures, etc. The forming mechanism and prevention measures of mass concrete cracks in thick floor slab are analyzed in depth, and the construction technology of crack control in thick floor slab mass concrete is effectively grasped, and the practical experience of construction in the future is increased. Firstly, according to the theory of concrete crack, this paper analyzes the cause of concrete crack formation, and introduces and discusses the influence of temperature stress and strain on concrete crack formation combined with the theory of temperature stress. Secondly, considering the reason of crack formation and the influence of temperature stress on concrete crack, this paper analyzes the preventive measures of concrete crack, including the control of temperature change and the control of mix ratio. How to prevent the formation of concrete cracks is discussed in the aspects of control of maintenance measures. Thirdly, this paper expounds the characteristics of mass concrete of thick floor slab of high-rise building, and combines the analysis results of crack formation and control, starting with different construction links, such as formwork, steel bar, concrete and so on. The construction characteristics and technology are analyzed. Fourth, this paper takes the construction of mass concrete in the floor of Beijing City Construction-Shihuapo County District as the main case, and combined with crack cause analysis and preventive measures analysis, respectively, describes the optimization of concrete mix ratio. Related construction measures such as temperature control of concrete outlet machine, arrangement of cooling system, pumping and pouring technology of concrete, monitoring and control of internal temperature of mass concrete and later maintenance etc. The effect of crack control in mass concrete shows that the above measures are feasible and effective, and the technical measures of temperature crack control of mass concrete are scientific. Normative.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU974

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