本文選題：高層建筑 + 近距臨河��； 參考：《西南科技大學》2017年碩士論文

【摘要】：高層建筑群的密集存在,使緊鄰既有"建筑、交通設(shè)置、河流和湖泊"等設(shè)施從事高層建筑實踐活動時有發(fā)生。由于鄰河(湖)居住環(huán)境幽靜、氣候宜人,該區(qū)域住宅建筑越來越受到市民的衷愛。然而,考慮到新建高層建筑周邊河流環(huán)境的影響,近距臨河從事工程實踐活動必須面臨的一個關(guān)鍵問題:河流水位變化、地震等突發(fā)荷載等對基坑結(jié)構(gòu)的整體穩(wěn)定性影響?基于此考慮,依托駐馬店市開源大道和文明路交叉口路南臨河黃淮學院教職工住宅樓為工程背景,對近距臨河高層建筑住宅基礎(chǔ)工程的穩(wěn)定性進行研究。主要內(nèi)容如下:在文獻查閱和現(xiàn)場調(diào)研的基礎(chǔ)上,對高層建筑結(jié)構(gòu)特點、支護類型等進行了總結(jié)和歸納;結(jié)合駐馬店市開源大道和文明路交叉口路南臨河黃淮學院教職工住宅樓工程實例,對建筑設(shè)計概況、水文地質(zhì)概況、地震等級及周邊臨河環(huán)境等進行分析;將數(shù)學模糊理論引入到基坑支護結(jié)構(gòu)穩(wěn)定性分析中,構(gòu)建影響支護結(jié)構(gòu)穩(wěn)定性因素的層次結(jié)構(gòu)模型,判別影響基坑支護結(jié)構(gòu)穩(wěn)定性的因素從輕到重依次為:水文地質(zhì)條件、基坑支護結(jié)構(gòu)、地震作用和近距河流影響。結(jié)合室內(nèi)土工試驗和現(xiàn)場原位試驗數(shù)據(jù),對基坑粉質(zhì)黏土的物理力學特性進行研究,提出基坑土釘墻支護方案并對其整體穩(wěn)定性進行評估。借助ABAQUS有限元軟件,采用數(shù)值模擬的方法對基坑開挖過程中支護結(jié)構(gòu)的穩(wěn)定性進行分析。結(jié)果表明:基坑開挖支護后,側(cè)向位移整體較小,最大側(cè)向位移控制在2mm以內(nèi),支護應力遠小于設(shè)計強度,基坑支護結(jié)構(gòu)穩(wěn)定性較高。分析"地震"和"河流水位變化"外部荷載條件改變對基坑支護結(jié)構(gòu)的影響。借助ABAQUS有限元軟件建立數(shù)值模擬,首先對臨河水文變化引起的基坑支護結(jié)構(gòu)穩(wěn)定性進行評估,然后對突發(fā)地震作用下基坑支護的整體穩(wěn)定性進行分析。同時結(jié)合數(shù)模型,探討了住宅樓使用期兩大外部荷載條件變化過程中基坑整體穩(wěn)定性。
[Abstract]:Because of the dense existence of high-rise buildings, the construction, traffic arrangement, rivers and lakes, and other facilities, which are close to each other, are often engaged in high-rise building practice activities. Because of the quiet living environment and pleasant climate, residential buildings in the area are becoming more and more popular. However, considering the influence of the river environment around the new high-rise building, a key problem that must be faced in engineering practice is the influence of river water level change, earthquake and other sudden loads on the overall stability of foundation pit structure. Based on this consideration, this paper studies the stability of the residential foundation of the high-rise building near the river in Zhumadian, relying on the residential building of Huanghe Huanghuai University in the south of Zhumadian intersection of Open Source Avenue and Civilization Road. The main contents are as follows: on the basis of literature review and field investigation, the characteristics of high-rise building structure and the types of support are summarized and summarized. Combined with the project example of the residential building of Huang-Huai University at the intersection of open source road and civilized road in Zhumadian, the general situation of architectural design, hydrogeology, earthquake grade and surrounding riverside environment are analyzed. This paper introduces the mathematical fuzzy theory into the stability analysis of foundation pit support structure, constructs the hierarchical structure model that affects the stability of foundation pit support structure, and discriminates the factors influencing the stability of foundation pit support structure from light to heavy: hydrogeological condition. Foundation pit support structure, seismic action and close-range river impact. The physical and mechanical properties of silty clay of foundation pit were studied based on the data of indoor geotechnical test and field in-situ test. The supporting scheme of soil nailing wall for foundation pit was put forward and its overall stability was evaluated. With the help of ABAQUS finite element software, the stability of supporting structure during excavation of foundation pit is analyzed by numerical simulation method. The results show that the lateral displacement is smaller after excavation, the maximum lateral displacement is controlled within 2mm, the support stress is much less than the design strength, and the stability of foundation pit support structure is high. The influence of "earthquake" and "river water level variation" on foundation pit supporting structure is analyzed. With the help of ABAQUS finite element software, the stability of foundation pit support structure caused by hydrological change in Linhe River is first evaluated, and then the overall stability of foundation pit support structure under sudden earthquake is analyzed. At the same time, combined with the numerical model, the overall stability of foundation pit during the change of two external load conditions of residential building is discussed.
【學位授予單位】：西南科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU470

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