發(fā)布時間：2018-10-07 17:49

【摘要】：基坑支護工程的設計,既要考慮到整個支護結構在施工過程中的安全,又要考慮到結構和周圍土體的變形,以保證周圍環(huán)境相鄰建筑物和地下公共設施等的安全。因此,如何確�；�坑工程的安全可靠、經(jīng)濟合理、實用可行是當前現(xiàn)代化城市建設中一個非常重要和迫切的問題。本課題以西安某深基坑工程為背景,在考慮臨近建筑物的情況進行支護結構設計,并研究其變形規(guī)律,主要進行了以下方面的研究:1、研究臨近建筑物對基坑圍護結構產(chǎn)生的附加應力,探討不同距離、不同基礎埋置深度的建筑物、不同基礎類型對基坑圍護結構的影響。2、總結深基坑常見的支護形式,支護結構的破壞形式,基坑變形規(guī)律、變形機理以及變形的影響因素和控制措施。3、根據(jù)實際工程背景,考慮臨近建筑物對圍護結構施加的附加應力,計算出各個工況下的內力、支點力、彎矩,進行深基坑支護的設計。4、運用數(shù)值模擬軟件,模擬工程開挖,驗證支護設計的安全性和合理性;并針對不同臨近建筑物的距離、基礎埋深進行模擬,研究其對深基坑開挖變形的影響。5、結合數(shù)值模擬結果和工程實測數(shù)據(jù),進一步驗證支護設計。同時分析該地區(qū)深基坑開挖的變形規(guī)律,為該地區(qū)類似工程提供一定的設計依據(jù)。
[Abstract]:In order to ensure the safety of adjacent buildings and underground public facilities, the design of foundation pit supporting engineering should not only consider the safety of the whole supporting structure during the construction process, but also consider the deformation of the structure and surrounding soil mass. Therefore, how to ensure the safety, reliability, economy, practicality and feasibility of foundation pit engineering is a very important and urgent problem in the construction of modern cities. Based on a deep foundation pit project in Xi'an, the support structure is designed in consideration of adjacent buildings, and its deformation law is studied. This paper mainly studies the following aspects: 1, studies the additional stress generated by adjacent buildings on the foundation pit enclosure structure, and discusses the buildings with different distances and different foundation depths. The influence of different foundation types on the retaining structure of deep foundation pit is summarized. The common supporting forms of deep foundation pit, the failure form of supporting structure, the deformation law of foundation pit, the deformation mechanism, the influencing factors and control measures of foundation pit are summarized. According to the actual engineering background, Considering the additional stress applied by the adjacent building to the retaining structure, the internal force, the fulcrum force, the bending moment under various working conditions are calculated, and the design of deep foundation pit support is carried out. The numerical simulation software is used to simulate the excavation of the engineering. To verify the safety and rationality of the support design, and to simulate the depth of the foundation for different adjacent buildings, and to study its influence on the deformation of deep foundation pit excavation. 5. Combined with the numerical simulation results and the engineering measured data, Further verify the support design. At the same time, the deformation law of deep foundation pit excavation in this area is analyzed, which provides certain design basis for similar projects in this area.
【學位授予單位】：西安科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU753

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