本文選題：深基坑 + 基坑降水　； 參考：《沈陽建筑大學》2014年碩士論文

【摘要】：隨著城市化發(fā)展進程的不斷加快,地下工程的開發(fā)與利用越來越多地受到人們的關(guān)注,深基坑、超深基坑工程不斷涌現(xiàn),巖土工程問題日益突出�；咏邓こ套鳛榛邮┕み^程中的重要環(huán)節(jié),是確保基坑開挖安全順利的關(guān)鍵,在實際施工中有著舉足輕重的地位。在實際工程中,絕大部分基坑降水方案趨于保守,實際水位降深值遠遠大于設(shè)計水位降深值,基坑總涌水量大幅度增加,對周圍建筑物產(chǎn)生了一定的影響,同時增加了工程降水費用,因此在保證基坑開挖安全順利的前提下,對于基坑降水方案進行優(yōu)化設(shè)計是十分必要的。通過優(yōu)化降低基坑總涌水量,使得實際降深值盡可能接近于設(shè)計水位降深值,減小對周圍建筑的影響,降低工程降水費用。本文闡述了基坑降水的主要方法,并對基坑降水基本理論以及降水優(yōu)化設(shè)計做了一定的介紹,在此基礎(chǔ)上主要開展了以下幾個方面的工作：(1)以各個控制點水位降深最大值最小化為目標函數(shù),以單井出水量為設(shè)計變量,通過把控制點水位降深大于設(shè)計水位降深、單井出水量小于單井最大出水量作為約束條件,同時考慮實際降水井的最大井深和最小井徑問題,建立了以單井出水量為變量的數(shù)學優(yōu)化模型；(2)考慮工程降水井布置問題,為了尋求最佳降水井布局,使得水位降深值趨于平穩(wěn),本文建立了以井距為設(shè)計變量,以控制點水位降深最大值最小化為目標函數(shù)的深基坑降水優(yōu)化數(shù)學模型；(3)運用所建數(shù)學模型分別對沈陽世貿(mào)五里河T3-T5及S3樓深基坑降水工程和另一工程實例進行優(yōu)化設(shè)計,并運用MATLAB軟件優(yōu)化函數(shù)對所建模型進行求解,減小了世貿(mào)五里河工程的基坑總涌水量,得到了工程實例二的合理井距；(4)采用三維地下水滲流軟件Visual Modflow通過對沈陽世貿(mào)五里河T3-T5及S3樓深基坑研究區(qū)域的水文地質(zhì)條件進行分析研究,建立了相應的概化條件模型,并分別對上文優(yōu)化結(jié)果與原設(shè)計方案進行仿真模擬,得到了良好的仿真效果,對前文建立優(yōu)化模型進行驗證；(5)在所建數(shù)值模型的基礎(chǔ)上,Visual Modflow軟件的井優(yōu)化模塊對沈陽世貿(mào)五里河T3-T5及S3樓深基坑研究區(qū)域進行降水井單井抽水量的優(yōu)化,并將優(yōu)化結(jié)果輸入模型,重新仿真計算,對比分析結(jié)果再次驗證了上文建立數(shù)學優(yōu)化模型的可行性。
[Abstract]:With the rapid development of urbanization, people pay more and more attention to the development and utilization of underground engineering. As an important part of foundation pit construction, foundation pit dewatering project is the key to ensure the safe and smooth excavation of foundation pit, and plays an important role in actual construction. In the actual engineering, most of the foundation pit dewatering schemes tend to be conservative, the actual water level drop value is far larger than the design water level drop value, and the total foundation pit water inflow increases substantially, which has a certain impact on the surrounding buildings. At the same time, the dewatering cost of the project is increased, so it is necessary to optimize the design of the foundation pit dewatering scheme under the premise of ensuring the safe and smooth excavation of the foundation pit. By optimizing the total discharge of foundation pit, the actual depth reduction value is as close as possible to the design water level drop value, the influence on the surrounding buildings is reduced, and the project dewatering cost is reduced. In this paper, the main methods of foundation pit dewatering are described, and the basic theory of foundation pit dewatering and the optimum design of foundation pit dewatering are introduced. On this basis, the following aspects of the work are mainly carried out: (1) taking the maximum value of water level drop at each control point as the objective function, taking the water output of a single well as the design variable, the depth of the water level of the control point is greater than the depth of the design water level. The single well output is less than the single well maximum output as the constraint condition, and the maximum well depth and minimum well diameter of the actual precipitation well are taken into account, and a mathematical optimization model with single well water output as variable is established. (2) considering the layout of engineering precipitation well, In order to find the best layout of the dewatering wells and make the water level drop more stable, a mathematical model of deep foundation pit dewatering optimization is established, which takes the well spacing as the design variable and minimizes the maximum depth drop of the control point as the objective function. (3) the mathematical model is used to optimize the dewatering project of T3-T5 and S3 building deep foundation pit of Shenyang Wuli River and another engineering example, and the optimization function of MATLAB software is used to solve the model. The total water inflow of foundation pit of Wuli River project is reduced, and the reasonable well spacing is obtained. (4) based on the analysis of hydrogeological conditions in the study area of T3-T5 and S3 building deep foundation pit of the Wuli River in Shenyang by using the three-dimensional groundwater seepage software Visual Modflow, the corresponding generalized condition model is established. And the above optimization results and the original design were simulated, and good simulation results were obtained, and the optimization model was established to verify the above results. (5) on the basis of the numerical model established, the well optimization module of Visual Modflow software is used to optimize the single well pumping capacity in the research area of deep foundation pit of Shenyang Wuli River T3-T5 and S3 building, and the optimized results are input into the model and re-simulated. The results of comparison and analysis verify the feasibility of the above mathematical optimization model.
【學位授予單位】：沈陽建筑大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU473.2

【相似文獻】

相關(guān)期刊論文 前10條

1 岳菊紅,王海霖;深基坑施工中的監(jiān)測項目及其特點[J];中州煤炭;2003年03期

2 盧一凡;深基坑工程管理淺談[J];長江建設(shè);2004年01期

3 黃宏偉,邊亦海;深基坑工程施工中的風險管理[J];地下空間與工程學報;2005年04期

4 鐘才根;劉慧霞;;深基坑工程風險源分析及防范對策[J];建設(shè)監(jiān)理;2005年06期

5 何顯舜;莫振瀚;;淺談深基坑的安全施工[J];四川建材;2006年03期

6 陳芳;黨淑鳳;;深基坑工程環(huán)境安全風險的技術(shù)控制[J];安裝;2007年02期

7 王偉;劉征;;上海市區(qū)深基坑工程風險管理——上海恒升名邸深基坑工程[J];上海建設(shè)科技;2007年06期

8 陳軍;;風險管理理論在深基坑工程中的應用[J];安徽建筑;2008年06期

9 楊鵬;;深基坑工程風險應對策略分析[J];中華建設(shè);2008年12期

10 吳忠懷;;論某花園廣場的深基坑支護應用[J];建材與裝飾(下旬刊);2008年01期

相關(guān)會議論文 前10條

1 施振東;;深基坑工程風險管理淺析[A];地基基礎(chǔ)工程與錨固注漿技術(shù)：2009年地基基礎(chǔ)工程與錨固注漿技術(shù)研討會論文集[C];2009年

2 李，

本文編號：2052965