本文選題：深基坑 + 裝配式預(yù)應(yīng)力魚腹梁鋼結(jié)構(gòu)支撐��； 參考：《安徽理工大學(xué)》2014年碩士論文

【摘要】：隨著城市高層建筑、地鐵工程、市政工程以及地下空間開發(fā)規(guī)模日益增大,基坑工程數(shù)量近年來急劇增加。深大基坑開挖及圍護結(jié)構(gòu)設(shè)計的影響因素甚多,環(huán)境保護的難度也越來越大。深基坑工程中常見的內(nèi)支撐支護形式主要為鋼筋混凝土支撐和鋼支撐,鋼筋混凝土支撐在施工和拆除過程中都將產(chǎn)生嚴重的環(huán)境污染、對原本已脆弱的環(huán)境保護產(chǎn)生極其不利影響,傳統(tǒng)鋼支撐支護體系安全性較差,變形量較大,造價較高。迫于工程界的強烈需求,研發(fā)了一種新型鋼結(jié)構(gòu)內(nèi)支撐——裝配式預(yù)應(yīng)力魚腹梁鋼結(jié)構(gòu)支撐,此種支護結(jié)構(gòu)能夠控制基坑變形及保護周邊環(huán)境、縮短工期,且能為基坑施工創(chuàng)造較大空間,減少環(huán)境污染及實現(xiàn)支護結(jié)構(gòu)構(gòu)件的循環(huán)利用,從而實現(xiàn)高效、綠色環(huán)保和節(jié)能減排的目的。為了分析此種支護結(jié)構(gòu)對深基坑變形控制作用,本文著重就裝配式預(yù)應(yīng)力魚腹梁鋼結(jié)構(gòu)支撐對深基坑變形的控制技術(shù)與方法研究作了深入研究,具體內(nèi)容如下： 本文就裝配式預(yù)應(yīng)力魚腹梁鋼結(jié)構(gòu)支撐對深基坑變形的控制技術(shù)進行研究,先從深基坑變形的自動監(jiān)測與預(yù)警技術(shù)切入,引入了有關(guān)基坑監(jiān)測的相關(guān)技術(shù)；再從深基坑的變形機理著手,給出深基坑變形的預(yù)測方法；為了分析該種鋼結(jié)構(gòu)支撐控制深基坑變形的規(guī)律和特點,采用Midas/GTS數(shù)值模擬軟件,通過對模擬結(jié)果的分析得出支撐內(nèi)力調(diào)整對變形控制的作用效果；針對伺服控制和手動控制兩種內(nèi)力控制方法的比較,表明伺服控制方法對變形的控制效果更及時有效。 基于變形控制技術(shù),闡述了深基坑變形控制方法�；陬A(yù)應(yīng)力控制變形的理論,闡述了預(yù)應(yīng)力施加與調(diào)整的方法。通過確定具體的基坑變形控制指標和控制預(yù)案,給出了變形控制的具體措施。最后將本文的研究成果應(yīng)用于兩個工程實例,通過對其變形控制效果的驗證與分析,證明本文提出的應(yīng)用裝配式預(yù)應(yīng)力魚腹梁鋼結(jié)構(gòu)支撐控制深基坑變形的技術(shù)與方法是有效的,能取得較好的工程效果,具有較高的實際應(yīng)用價值。
[Abstract]:With the increasing scale of urban high-rise building, subway engineering, municipal engineering and underground space development, the number of foundation pit engineering has increased rapidly in recent years. There are many factors influencing the excavation of deep and large foundation pit and the design of enclosure structure, and the environmental protection is becoming more and more difficult. In deep foundation pit engineering, the common forms of internal support are mainly reinforced concrete support and steel bracing, and the reinforced concrete support will cause serious environmental pollution in the process of construction and demolition. It has an extremely adverse effect on the already fragile environmental protection. The traditional steel bracing system is of poor security, large deformation and high cost. Under the strong demand of the engineering field, a new type of steel structure is developed, which can control the deformation of foundation pit, protect the surrounding environment and shorten the time limit. It can create a large space for foundation pit construction, reduce environmental pollution and realize the recycling of supporting structural components, thus achieving the purpose of high efficiency, green environmental protection and energy saving and emission reduction. In order to analyze the effect of this kind of supporting structure on the deformation control of deep foundation pit, this paper focuses on the deep research on the control technology and method of the steel structure bracing of prestressing prestressed fish-web beam to the deep foundation pit. The main contents are as follows: in this paper, the deformation control technology of deep foundation pit is studied based on the steel structure bracing of prestressing prestressed fish-web beam, and the automatic monitoring and warning technology of deep foundation pit deformation is introduced. In order to analyze the rules and characteristics of this kind of steel structure support controlling deep foundation pit deformation, Midas / GTS numerical simulation software is used to predict the deformation of deep foundation pit, which is based on the deformation mechanism of deep foundation pit. Through the analysis of the simulation results, the effect of adjusting the supporting internal force on the deformation control is obtained, and the comparison between the servo control and manual control shows that the servo control method is more timely and effective for the deformation control. Based on deformation control technology, the deformation control method of deep foundation pit is described. Based on the theory of prestress control deformation, the method of prestress application and adjustment is expounded. Through determining the concrete foundation pit deformation control index and control plan, the concrete measure of deformation control is given. Finally, the research results of this paper are applied to two engineering examples, through the verification and analysis of its deformation control effect, It is proved that the technology and method proposed in this paper to control the deformation of deep foundation pit with the steel structure bracing of prestressing prestress fish-web beam is effective, can obtain better engineering effect and has higher practical application value.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU753

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