發(fā)布時(shí)間：2018-11-19 18:57

【摘要】：隨著我國(guó)經(jīng)濟(jì)飛速發(fā)展,全國(guó)各地出現(xiàn)了許多大型的深基坑工程,其中很大一部分處于城市中心,基坑工程的施工必然會(huì)使周邊建筑物發(fā)生變形,同時(shí)帶來(lái)一些安全隱患。實(shí)時(shí)地對(duì)建筑物進(jìn)行監(jiān)測(cè)、分析和處理實(shí)測(cè)的變形數(shù)據(jù),并針對(duì)基坑開(kāi)挖運(yùn)用合適的預(yù)測(cè)方法對(duì)建筑的變形進(jìn)行預(yù)測(cè),是在基坑施工期間保證周邊建筑物安全的重要手段。現(xiàn)在對(duì)于變形分析的研究?jī)?nèi)容一般分為變形的物理解釋和幾何分析兩部分。變形的物理解釋的任務(wù)是建立變形體的變形和變形原因之間的關(guān)系,解釋變形的原因。幾何分析的任務(wù)是在各種荷載作用下描述變形體變形的空間狀態(tài)和特性。針對(duì)深基坑開(kāi)挖導(dǎo)致的建筑物變形問(wèn)題,本文首先通過(guò)改進(jìn)的灰色系統(tǒng)模型對(duì)數(shù)據(jù)進(jìn)行處理；其次結(jié)合BP神經(jīng)網(wǎng)絡(luò)模型的自學(xué)習(xí)性強(qiáng)的特點(diǎn),對(duì)改進(jìn)的灰色系統(tǒng)模型的預(yù)測(cè)誤差進(jìn)行改正。通過(guò)對(duì)其精度的分析可知,該組合模型對(duì)建筑物變形的預(yù)測(cè)可以達(dá)到很高的精度；最后,本文基于深基坑開(kāi)挖前的地質(zhì)資料,運(yùn)用有限差分軟件FLAC3D建立深基坑支護(hù)結(jié)構(gòu)、周?chē)馏w和建筑物的簡(jiǎn)化模型,并通過(guò)深基坑工程開(kāi)挖初期建筑物的變形監(jiān)測(cè)資料對(duì)該模型參數(shù)進(jìn)行優(yōu)化,并根據(jù)該模型對(duì)深基坑開(kāi)挖進(jìn)行模擬,對(duì)建筑物上的監(jiān)測(cè)點(diǎn)做預(yù)測(cè),其預(yù)測(cè)結(jié)果稍大于實(shí)測(cè)結(jié)果。
[Abstract]:With the rapid development of economy in China, many large deep foundation pit projects have appeared all over the country, most of which are located in the center of the city. The construction of foundation pit engineering will inevitably make the surrounding buildings deform and bring some hidden dangers to safety at the same time. It is an important means to ensure the safety of surrounding buildings to monitor the buildings in real time, to analyze and process the measured deformation data, and to forecast the deformation of the buildings by using the appropriate prediction method for the excavation of the foundation pit. Now the research on deformation analysis is divided into two parts: physical interpretation and geometric analysis. The task of physical interpretation of deformation is to establish the relationship between deformation and its causes, and to explain the causes of deformation. The task of geometric analysis is to describe the spatial state and characteristics of deformation under various loads. Aiming at the problem of building deformation caused by deep foundation pit excavation, this paper deals with the data through the improved grey system model. Secondly, the prediction error of the improved grey system model is corrected based on the strong self-learning characteristic of BP neural network model. Through the analysis of its precision, it can be known that the combined model can predict the deformation of buildings with high accuracy. Finally, based on the geological data before excavation of deep foundation pit, a simplified model of supporting structure, surrounding soil and building of deep foundation pit is established by using finite difference software FLAC3D. The parameters of the model are optimized by the deformation monitoring data of the building in the early stage of excavation of deep foundation pit. According to the model, the excavation of deep foundation pit is simulated, and the monitoring points on the building are forecasted, and the prediction results are slightly larger than the measured results.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU433

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳炳志;;基坑變形灰色人工神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)模型及其應(yīng)用[J];山東科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2010年05期

2 戴文戰(zhàn);熊偉;楊?lèi)?ài)萍;;基于函數(shù)cot(x~α)變換及背景值優(yōu)化的灰色建模[J];浙江大學(xué)學(xué)報(bào)(工學(xué)版);2010年07期

3 陳露;張凌霜;;基于初值修正的組合灰色Verhulst模型[J];數(shù)學(xué)的實(shí)踐與認(rèn)識(shí);2010年11期

4 崔立志;劉思峰;;基于數(shù)據(jù)變換技術(shù)的灰色預(yù)測(cè)模型[J];系統(tǒng)工程;2010年05期

5 林源;胡長(zhǎng)明;李永輝;張軍;;某黃土深基坑圍護(hù)結(jié)構(gòu)變形數(shù)值分析與優(yōu)化[J];施工技術(shù);2010年05期

6 陳尚榮;趙升峰;;BP神經(jīng)網(wǎng)絡(luò)在基坑變形預(yù)測(cè)分析中的應(yīng)用[J];上海地質(zhì);2010年01期

7 蔡連舉;;灰色系統(tǒng)理論在基坑變形觀測(cè)中的應(yīng)用[J];遼東學(xué)院學(xué)報(bào)(自然科學(xué)版);2009年03期

8 劉勇;馮志;黃國(guó)超;馮旭棟;;北京地鐵工程深基坑圍護(hù)結(jié)構(gòu)變形研究[J];地下空間與工程學(xué)報(bào);2009年02期

9 胡冬;張小平;;基于灰色系統(tǒng)理論的基坑變形預(yù)測(cè)研究[J];地下空間與工程學(xué)報(bào);2009年01期

10 李志高;曾遠(yuǎn);劉國(guó)彬;;鄰近地鐵車(chē)站基坑開(kāi)挖位移傳遞規(guī)律數(shù)值模擬[J];巖土力學(xué);2008年11期

相關(guān)碩士學(xué)位論文 前2條

1 蘇建超;地鐵車(chē)站深基坑開(kāi)挖監(jiān)測(cè)及有限元分析研究[D];天津大學(xué);2009年

2 周紅斌;基于時(shí)間序列分析的地鐵基坑變形監(jiān)測(cè)數(shù)據(jù)處理方法研究[D];東北大學(xué);2008年

，

本文編號(hào)：2343153