發(fā)布時(shí)間：2018-10-07 17:49

【摘要】：基坑支護(hù)工程的設(shè)計(jì),既要考慮到整個(gè)支護(hù)結(jié)構(gòu)在施工過(guò)程中的安全,又要考慮到結(jié)構(gòu)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(shè)施等的安全。因此,如何確�；�坑工程的安全可靠、經(jīng)濟(jì)合理、實(shí)用可行是當(dāng)前現(xiàn)代化城市建設(shè)中一個(gè)非常重要和迫切的問(wèn)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(jìn)行支護(hù)結(jié)構(gòu)設(shè)計(jì),并研究其變形規(guī)律,主要進(jìn)行了以下方面的研究:1、研究臨近建筑物對(duì)基坑圍護(hù)結(jié)構(gòu)產(chǎn)生的附加應(yīng)力,探討不同距離、不同基礎(chǔ)埋置深度的建筑物、不同基礎(chǔ)類型對(duì)基坑圍護(hù)結(jié)構(gòu)的影響。2、總結(jié)深基坑常見(jiàn)的支護(hù)形式,支護(hù)結(jié)構(gòu)的破壞形式,基坑變形規(guī)律、變形機(jī)理以及變形的影響因素和控制措施。3、根據(jù)實(shí)際工程背景,考慮臨近建筑物對(duì)圍護(hù)結(jié)構(gòu)施加的附加應(yīng)力,計(jì)算出各個(gè)工況下的內(nèi)力、支點(diǎn)力、彎矩,進(jìn)行深基坑支護(hù)的設(shè)計(jì)。4、運(yùn)用數(shù)值模擬軟件,模擬工程開(kāi)挖,驗(yàn)證支護(hù)設(shè)計(jì)的安全性和合理性;并針對(duì)不同臨近建筑物的距離、基礎(chǔ)埋深進(jìn)行模擬,研究其對(duì)深基坑開(kāi)挖變形的影響。5、結(jié)合數(shù)值模擬結(jié)果和工程實(shí)測(cè)數(shù)據(jù),進(jìn)一步驗(yàn)證支護(hù)設(shè)計(jì)。同時(shí)分析該地區(qū)深基坑開(kāi)挖的變形規(guī)律,為該地區(qū)類似工程提供一定的設(shè)計(jì)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(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU753

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