【摘要】：隨著現(xiàn)代城市高層建筑的不斷發(fā)展,基坑的規(guī)模不僅越來(lái)越大,而且越來(lái)越深,這就對(duì)安全施工提出了極大的挑戰(zhàn),因此基坑施工的同時(shí),就需要選擇適當(dāng)?shù)幕幼冃伪O(jiān)測(cè)體系,使國(guó)際上專(zhuān)家學(xué)者對(duì)深基坑變形監(jiān)測(cè)體系研究越來(lái)越關(guān)注。但是我國(guó)在深基坑方面的研究相對(duì)較晚,直到1999年我們才召開(kāi)了第一次專(zhuān)門(mén)的深基坑研究領(lǐng)域的會(huì)議,不僅理論研究相對(duì)落后于實(shí)踐,并且我國(guó)沒(méi)有豐富的工程實(shí)踐,而且在施工管理和經(jīng)驗(yàn)上也很缺乏,因此在深基坑工程施工期間造成的工程事故率遠(yuǎn)遠(yuǎn)高于發(fā)達(dá)國(guó)家。因此,本文通過(guò)查閱大量的有關(guān)資料文章,對(duì)上述這樣的基坑工程在基坑變形監(jiān)測(cè)體系研究上從以下方面開(kāi)始著手： 首先介紹了基坑變形所涉及到的巖土變形理論以及地下水對(duì)巖體變形的機(jī)理,論述了基坑在開(kāi)挖過(guò)程中的幾個(gè)變形形式,一是在基坑剛剛開(kāi)挖時(shí),基坑底會(huì)彈性隆起,基坑底中間有最大的隆起；二是隨著基坑開(kāi)挖的不斷加深基坑周?chē)牡乇碡Q直沉降變大；三是在基坑開(kāi)挖過(guò)程中加固結(jié)構(gòu)的水平位移和豎直沉降量也變大。 本文接著分析了深基坑的監(jiān)測(cè)布置體系,比較詳細(xì)的講述了基坑監(jiān)測(cè)體系布置時(shí)的規(guī)定、監(jiān)測(cè)內(nèi)容如何確定以及使用哪些監(jiān)測(cè)儀器和每種監(jiān)測(cè)儀器使用的監(jiān)測(cè)方法的篩選。由于監(jiān)測(cè)數(shù)據(jù)量大而且性質(zhì)多樣,所以選擇合理的監(jiān)測(cè)數(shù)據(jù)的處理方法尤為重要,如誤差分析和平差原理等。最后采取數(shù)學(xué)的方法對(duì)監(jiān)測(cè)數(shù)據(jù)進(jìn)行歸納作圖,最終確定各個(gè)監(jiān)測(cè)內(nèi)容的警戒值。 在論文的最后,結(jié)合大連恒隆廣場(chǎng)基坑開(kāi)挖項(xiàng)目具體分析了整個(gè)監(jiān)測(cè)體系的實(shí)施過(guò)程。通過(guò)上述理論操作方法,首先對(duì)基坑的某幾斷面進(jìn)行了ANSYS數(shù)值模擬分析,通過(guò)ANSYS分析模型的計(jì)算結(jié)果與在施工期間的監(jiān)測(cè)結(jié)果相比較,變形結(jié)果一致,不僅評(píng)估了此基坑工程在施工過(guò)程中的安全隱患,而且在施工的同時(shí)及時(shí)指導(dǎo)基坑工程安全施工和預(yù)防工程事故的發(fā)生。
[Abstract]:With the continuous development of high-rise buildings in modern cities, the scale of foundation pit is not only becoming larger and deeper, which poses a great challenge to the safe construction, so the foundation pit construction at the same time, It is necessary to select appropriate foundation pit deformation monitoring system, which makes the international experts and scholars pay more and more attention to the deep foundation pit deformation monitoring system. However, the research on deep foundation pit in our country is relatively late. Until 1999, we did not hold the first special conference on deep foundation pit research, which not only lagged behind practice, but also did not have rich engineering practice in our country. Because of the lack of construction management and experience, the accident rate during the construction of deep foundation pit is much higher than that in developed countries. Therefore, by consulting a large number of relevant information articles, The research on the foundation pit deformation monitoring system for the above mentioned foundation pit works starts from the following aspects: firstly, the theory of rock and soil deformation involved in foundation pit deformation and the mechanism of groundwater deformation to rock mass are introduced. Several deformation forms of foundation pit during excavation are discussed. One is that when the foundation pit is just excavated, the bottom of the foundation pit will be raised elastically, and there is the largest uplift in the middle of the bottom of the foundation pit. The second is that the vertical settlement of the ground around the foundation pit becomes larger with the deepening of the excavation, and the horizontal displacement and the vertical settlement of the strengthened structure also become larger during the excavation of the foundation pit. This paper then analyzes the monitoring and layout system of deep foundation pit, describes in detail the provisions of the foundation pit monitoring system arrangement, how to determine the monitoring content and which monitoring instruments to use and how to screen the monitoring methods used by each monitoring instrument. Because of the large amount of monitoring data and diverse nature, it is very important to choose a reasonable method to deal with the monitoring data, such as error analysis and differential principle. Finally, the monitoring data are summed up and mapped by mathematical method, and the warning values of each monitoring content are finally determined. At the end of the paper, the implementation process of the whole monitoring system is analyzed with the foundation pit excavation project of Dalian Henglong Square. Through the above theory and operation method, the ANSYS numerical simulation analysis of some sections of foundation pit is carried out, and the calculated results of the ANSYS analysis model are compared with the monitoring results during construction, and the deformation results are consistent. This paper not only evaluates the hidden danger of the foundation pit in the construction process, but also guides the safe construction of the foundation pit and the prevention of the accident.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU473.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王正曉,劉保信,張曉春,耿玉\，

本文編號(hào)：2327265