本文關(guān)鍵詞：深基坑環(huán)梁支護結(jié)構(gòu)的內(nèi)力分析　出處：《武漢理工大學》2013年碩士論文　論文類型：學位論文

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【摘要】：深基坑環(huán)梁內(nèi)支撐支護結(jié)構(gòu)是近幾年來基坑工程中出現(xiàn)的一種新型的基坑支護結(jié)構(gòu)形式,目前在我國東部沿海地區(qū)應(yīng)用比較廣泛,與其他支護形式相比,環(huán)梁支護結(jié)構(gòu)具有安全、經(jīng)濟、穩(wěn)定、受力合理、施工方便、能有效利用施工空間、工期短、結(jié)構(gòu)工程量小、便于拆除等特點。尤其是在地基軟弱,場地狹窄的條件下,更能發(fā)揮其優(yōu)越性。目前有關(guān)環(huán)梁支護結(jié)構(gòu)與周圍土體間的作用機理的相關(guān)計算理論還不成熟,因此限制了它的廣泛應(yīng)用。 本文闡述了基坑環(huán)梁內(nèi)支撐支護結(jié)構(gòu)的研究現(xiàn)狀及存在的問題,分析了環(huán)梁支護結(jié)構(gòu)的特點、構(gòu)造和平面布置,分析了環(huán)梁內(nèi)支撐支護結(jié)構(gòu)在均布荷載下的應(yīng)力解答以及環(huán)梁支護結(jié)構(gòu)設(shè)計計算的幾種基本方法,特別是結(jié)合工程實例對環(huán)梁支護結(jié)構(gòu)在偏心荷載作用下的內(nèi)力進行了計算和分析,提出了環(huán)梁內(nèi)支撐結(jié)構(gòu)在偏心荷載作用下其內(nèi)力的近似計算方法,為環(huán)梁內(nèi)支撐結(jié)構(gòu)的設(shè)計提供參考依據(jù)。主要研究內(nèi)容包括以下幾個方面： (1)闡述基坑環(huán)梁式內(nèi)支撐支護結(jié)構(gòu)的研究現(xiàn)狀及存在的問題,分析環(huán)梁支護結(jié)構(gòu)的特點、構(gòu)造以及平面布置�？偨Y(jié)了圓形環(huán)梁內(nèi)支撐支護結(jié)構(gòu)在設(shè)計與施工過程中需要注意的事項。 (2)分析了環(huán)梁內(nèi)支撐支護結(jié)設(shè)計計算的幾種基本方法,結(jié)合某深基坑環(huán)梁內(nèi)支撐支護結(jié)構(gòu)的實例進行計算分析,包括環(huán)梁支護結(jié)構(gòu)側(cè)壓力的計算,環(huán)梁支護結(jié)構(gòu)的內(nèi)力分析,圓形環(huán)梁支護結(jié)構(gòu)在均布荷載下的應(yīng)力解答,環(huán)梁結(jié)構(gòu)材料,斷面尺寸以及配筋設(shè)計計算,支護結(jié)構(gòu)土體的穩(wěn)定性分析,基坑底部抗隆起驗算和抗?jié)B流驗算等。 (3)結(jié)合某基坑環(huán)梁式內(nèi)支撐支護結(jié)構(gòu)設(shè)計的工程實例,利用MATLAB、“天漢”等軟件,以西面1#主樓基坑的內(nèi)力計算和配筋設(shè)計為例,對環(huán)梁支護結(jié)構(gòu)的受力進行分析。對基坑鉆孔灌注樁樁排支護結(jié)構(gòu)、鎖口梁、內(nèi)支撐、圍囹、圓環(huán)梁、主支撐梁、次撐梁、立柱等進行設(shè)計,并分析了內(nèi)支撐的施工工況、拆撐及換撐等。 (4)提出了環(huán)梁式內(nèi)支撐支護結(jié)構(gòu)在偏心荷載作用下其內(nèi)力的近似計算方法,給出了環(huán)梁結(jié)構(gòu)在偏心荷載作用下的應(yīng)力解析解,結(jié)合工程實例對環(huán)梁結(jié)構(gòu)的受力進行簡化處理后,將應(yīng)力解析解用于承受偏心荷載的環(huán)梁結(jié)構(gòu)的應(yīng)力計算。討論地下水的不均勻變化、地面的不均勻堆載等多種因素對環(huán)梁結(jié)構(gòu)可能產(chǎn)生的拉應(yīng)力大小的影響,并對環(huán)梁截面的內(nèi)力分布進行模擬分析,這對環(huán)梁截面的配筋以及基坑的開挖施工都有較大的指導作用。
[Abstract]:Deep foundation pit ring beam supporting structure in recent years is the foundation pit engineering is a new type of foundation pit supporting structure form, the application in the eastern coastal area of China is relatively wide, and other forms of support, ring beam retaining structure with safety, economy, stability, reasonable stress, construction convenient, efficient use of space construction, short construction period, a small amount of engineering structure, convenient disassembly and so on. Especially in the soft foundation, under the conditions of narrow space, can exert its superiority. The calculation theory of the mechanism of ring beam supporting structure and the surrounding soil is still not mature, so the limit its wide application.
This paper expounds the research status of supporting and retaining structure of foundation pit and the problems in the ring beam, analysis of ring beam retaining structure characteristics, structure and layout, analysis of the ring beam supporting structure in the uniform should be several basic methods of calculation and capacity of ring beam retaining structure design under load in particular, combined with the engineering example of ring beam supporting structure under eccentric load are calculated and analyzed, put forward in the ring beam supporting structure under eccentric load in the approximate calculation method of the internal force, as in the ring beam supporting structure is designed to provide a reference. The main contents include the following aspects:
(1) the research status and existing problems of ring beam type inner supporting structure for foundation pit are expounded. The characteristics, structure and layout of ring beam supporting structure are analyzed. The matters needing attention in the design and construction process of the supporting structure in the circular ring beam are summarized.
(2) analysis of several basic methods of calculation of supporting node design of supporting ring beam, with a ring of deep foundation pit supporting structure calculation and analysis of examples in the beam, the calculation including the lateral support structure of ring beam stress analysis of beam, the supporting structure of the internal force of circular ring, ring beam retaining structure in under uniform load stress solution, ring beam structure materials, calculation of section size and reinforcement design, analysis of a soil retaining structure of foundation pit bottom uplift stability checking and anti seepage calculation.
(3) combined with a ring beam bracing of foundation pit engineering, the design of supporting structure by MATLAB, "Han" and other software, to the west of 1# main building foundation internal force calculation and reinforcement design as an example, the ring beam supporting structure stress analysis. On the foundation of bored pile row retaining structure, locking beam, support, waling, ring beam, main supporting beam, a supporting beam, column design, and analyzes the construction conditions in support, support and remove support exchange.
(4) put forward the supporting structure under eccentric load the internal force calculation method of approximate support ring beam, gives the analytic solution of stress under eccentric load ring beam structure, combined with the engineering example of ring beam structure stress is simplified, the analytic solution of stress should be used to calculate the ring beam structure under eccentric load. Discuss the uneven change of groundwater, the ground uneven loading of factors such as the effect of stress on the size of ring beam structure possible, and the internal force of ring beam distribution is simulated and analyzed, the reinforcement of the ring beam and the excavation of foundation pit the construction of a greater role in guiding.

【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU473.2

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本文編號：1419045