發(fā)布時間：2018-05-28 01:18

  本文選題：蘇州地鐵 + 基坑　； 參考：《東南大學(xué)》2016年碩士論文

【摘要】：隨著經(jīng)濟的快速發(fā)展,近年來地鐵作為解決城市交通擁堵的重要手段得到了快速發(fā)展。地鐵往往穿越城市中心,如何控制地鐵基坑施工變形,確保周邊建筑物的安全性和使用性是城市地鐵工程建設(shè)需要面對的關(guān)鍵技術(shù)問題之一。本文以蘇州地鐵4號線建設(shè)為依托,采用數(shù)值模擬與監(jiān)測數(shù)據(jù)統(tǒng)計相結(jié)合的方法,對蘇州地鐵施工對周邊環(huán)境影響,不同類型基礎(chǔ)形式受基坑施工影響及其分區(qū)進行了系統(tǒng)的研究。主要研究內(nèi)容和成果如下：(1)全面總結(jié)了蘇州地鐵4號線沿線80.0m深度范圍內(nèi)地層水文地質(zhì)條件及工程地質(zhì)條件,根據(jù)車站深基坑與含水層(或隔水層)的空間組合關(guān)系、不同區(qū)域水文地質(zhì)條件差異等,將蘇州地鐵4號線沿線水文地質(zhì)結(jié)構(gòu)分為八類；以基坑深度范圍內(nèi)涉及含水層類型以及基坑底部含水層對基坑施工是否造成危害為原則,將蘇州地鐵4號線車站深基坑分為五類,分析了各類基坑對周邊環(huán)境影響的基本特征。(2)運用數(shù)值模擬與監(jiān)測數(shù)據(jù)統(tǒng)計相結(jié)合的手段,分析蘇州地鐵1、4號線深基坑圍護結(jié)構(gòu)側(cè)向變形及坑外土體沉降形式。給出了蘇州地鐵1、4號線基坑圍護結(jié)構(gòu)最大側(cè)向位移、坑外地表最大沉降變化范圍及平均值。(3)統(tǒng)計了蘇州地鐵4號線沿線典型基礎(chǔ)形式,采用數(shù)值模擬方法分析了基坑施工對不同基礎(chǔ)形式建筑物影響特點。利用Rayleigh函數(shù)擬合了基坑外土體沉降曲線,在此基礎(chǔ)上提出了基坑施工環(huán)境影響分區(qū),給出了不同區(qū)域內(nèi)地表變形規(guī)律、上部結(jié)構(gòu)受力特點。(4)利用GIS建立數(shù)據(jù)平臺,對蘇州地鐵4號線水文地質(zhì)條件分類、數(shù)值模擬結(jié)果進行了可視化建模,實現(xiàn)水文地質(zhì)結(jié)構(gòu)土層情況、降壓降水環(huán)境影響分區(qū)以及基坑周邊水位降深等值線的可視呈現(xiàn)。
[Abstract]:With the rapid development of economy, subway has been developed rapidly in recent years as an important means to solve urban traffic congestion. Subway often passes through the city center. How to control the deformation of subway foundation pit construction and ensure the safety and usability of surrounding buildings is one of the key technical problems in urban subway construction. Based on the construction of Suzhou Metro Line 4, this paper uses the method of numerical simulation and monitoring data statistics to influence the surrounding environment of Suzhou subway construction. The influence of foundation pit construction on different types of foundation is studied systematically. The main research contents and results are as follows: (1) the hydrogeological and engineering geological conditions in the depth of 80.0m along Suzhou Metro Line 4 are summarized, and according to the spatial combination relationship between the deep foundation pit of the station and the aquifer (or aquifer), The hydrogeological structure along Suzhou Subway Line 4 is divided into eight categories according to the difference of hydrogeological conditions in different regions, and the principle is that the type of aquifer is involved in the depth of foundation pit and whether the aquifer at the bottom of the foundation pit causes harm to the construction of foundation pit. The deep foundation pit of Suzhou Metro Line 4 Station is divided into five categories, and the basic characteristics of the impact of each kind of foundation pit on the surrounding environment are analyzed. The method of combining numerical simulation with monitoring data statistics is used. The lateral deformation of deep foundation pit enclosure and the settlement of soil outside the pit of Suzhou Metro Line 1 and 4 are analyzed. The maximum lateral displacement of the retaining structure of the foundation pit of Suzhou Metro Line 1 and 4 and the range and average value of the maximum settlement of the outside surface of the pit are given. The typical foundation forms along the Suzhou Metro Line 4 are analyzed. The numerical simulation method is used to analyze the influence of foundation pit construction on different foundation structures. The settlement curve of soil outside foundation pit is fitted by using Rayleigh function. On the basis of this, the influence zone of foundation pit construction environment is put forward, and the law of surface deformation in different areas is given, and the stress characteristics of superstructure. 4) the data platform is established by GIS. The hydrogeological conditions of Suzhou Subway Line 4 are classified, and the results of numerical simulation are visualized to realize the visualization of hydrogeological structure, the environmental impact zone of depressurization and precipitation, and the contour of water level and depth around the foundation pit.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U231.3

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本文編號：1944627