【摘要】：伴隨著經(jīng)濟的發(fā)展,城市的規(guī)劃用地越來越緊張,開發(fā)城市的地下空間已經(jīng)成為一種必然的趨勢。在城市化的推進下,建筑物的密度日趨增大,基坑工程的安全性和穩(wěn)定性問題日益突出。近些年常會出現(xiàn)基坑工程位于已運行的地鐵區(qū)間隧道之上或之側這一新問題�；幼冃沃苯雨P系到支護結構的安全穩(wěn)定、基坑周邊環(huán)境安全及基坑工程順利施工,它主要包括支護結構的水平位移、基坑周邊地表沉降、基坑底部隆起等�；幼冃涡问�、計算方法、變形限值等方面的深入研究成為基坑工程支護結構設計的重點和難點。本文結合沈陽某基坑工程的實測數(shù)據(jù),對基坑變形進行了分析,并結合數(shù)值模擬研究了基坑變形影響因素。1、通過對沈陽某基坑變形機理和圍護結構影響情因素的分析,得出影響基坑變形的主要因素有：基坑圍護結構的設計情況、基坑所在地的地質、基坑形狀、開挖深度、基坑周邊環(huán)境、施工方案等。2、在基坑工程施工的過程中,應選擇合理的施工方案,并且對圍護結構樁體的變形、樁頂水平位移、周圍地面沉降等進行全方位監(jiān)測,根據(jù)監(jiān)測數(shù)據(jù)判斷可能出現(xiàn)的問題,預防事故的發(fā)生。3、在基坑開挖的過程中,隨著基坑開挖深度逐漸增大,圍護結構的水平變形也不斷增大,并且向基坑內變形,最大位移發(fā)生在圍護結構的頂端。4、在運用ABAQUS軟件進行數(shù)值模擬時,由于參數(shù)選取過于保守,從而使數(shù)據(jù)出現(xiàn)較大差異。從中可以看出,在運用ABAQUS軟件進行數(shù)值模擬時,應對相應的參數(shù)進行校正,更貼近于實際施工,從而使模擬數(shù)據(jù)出更趨近于實際情況。
[Abstract]:With the development of economy, urban planning land is becoming more and more tight, and it has become an inevitable trend to develop urban underground space. With the development of urbanization, the density of buildings increases day by day, and the safety and stability of foundation pit engineering become more and more serious. In recent years, there is a new problem of foundation pit engineering located above or on the side of the subway tunnel in operation. The deformation of foundation pit is directly related to the safety and stability of the supporting structure, the safety of the surrounding environment of the foundation pit and the smooth construction of the foundation pit. It mainly includes the horizontal displacement of the supporting structure, the ground subsidence around the foundation pit, the uplift of the bottom of the foundation pit, and so on. The deep research of foundation pit deformation form, calculation method and deformation limit value has become the key and difficulty of foundation pit engineering supporting structure design. Based on the measured data of a foundation pit project in Shenyang, the deformation of foundation pit is analyzed, and the influencing factors of foundation pit deformation are studied by numerical simulation. The deformation mechanism of a foundation pit and the influencing factors of enclosure structure in Shenyang are analyzed. The main factors influencing the deformation of foundation pit are as follows: the design of foundation pit enclosure structure, the geology of foundation pit location, the shape of foundation pit, the depth of excavation, the surrounding environment of foundation pit, the construction scheme and so on. The reasonable construction plan should be selected, and the deformation of the pile body, the horizontal displacement of the top of the pile and the settlement of the surrounding land should be monitored in all directions, and the possible problems should be judged according to the monitoring data. In the course of foundation pit excavation, as the excavation depth increases, the horizontal deformation of the retaining structure also increases, and it deforms into the foundation pit. The maximum displacement occurs at the top of the enclosure structure. When the numerical simulation is carried out with ABAQUS software, the parameter selection is too conservative, so there is a great difference in the data. It can be seen that when using ABAQUS software to carry out numerical simulation, the corresponding parameters should be corrected more closely to the actual construction, thus making the simulation data closer to the actual situation.
【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】：TU433

【參考文獻】

相關期刊論文 前10條

1 張明聚;司峰軍;葉新豐;謝小春;;深基坑圍護混合支撐體系內力與變形監(jiān)測分析[J];北京工業(yè)大學學報;2010年11期

2 田憲國;;地鐵車站深基坑開挖圍護結構與施工技術研究[J];鐵道建筑;2010年06期

3 蔡乾廣;蔡大成;;地鐵車站變形監(jiān)測技術及數(shù)據(jù)處理方法研究[J];現(xiàn)代測繪;2010年02期

4 余新明;錢梅芳;;某地鐵車站基坑變形影響因素分析[J];山西建筑;2010年04期

5 謝弘帥;;深基坑開挖對臨近地鐵車站基坑影響的有限元計算分析[J];上海地質;2009年02期

6 劉勇;馮志;黃國超;馮旭棟;;北京地鐵工程深基坑圍護結構變形研究[J];地下空間與工程學報;2009年02期

7 唐世強;;地鐵深基坑支護體系內力及變形規(guī)律分析[J];鐵道建筑;2008年11期

8 郭建強;龔洪祥;李俊才;高永;劉翔;;地鐵車站深基坑施工對臨近建筑物影響的控制[J];建筑科學;2008年09期

9 涂成立;徐禎祥;;支持向量機在地鐵車站深基坑圍護結構變形預測的應用[J];鐵道建筑;2007年09期

10 安關峰;高峻岳;;廣州地鐵公園前地下空間深基坑綜合支護監(jiān)測分析[J];巖土工程學報;2007年06期

相關博士學位論文 前2條

1 劉濤;基于數(shù)據(jù)挖掘的基坑工程安全評估與變形預測研究[D];同濟大學;2007年

2 徐中華;上海地區(qū)支護結構與主體地下結構相結合的深基坑變形性狀研究[D];上海交通大學;2007年

相關碩士學位論文 前2條

1 徐奴文;地鐵車站深基坑開挖與支護有限元數(shù)值模擬[D];大連理工大學;2008年

2 王一鳴;有限元理論在基坑工程中的應用研究[D];南京航空航天大學;2006年

，

本文編號：2174883