本文關(guān)鍵詞：考慮滲流應(yīng)力耦合的深基坑開挖對(duì)鄰近隧道的影響　出處：《安徽理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 深基坑 滲流應(yīng)力耦合 FLAC3D 數(shù)值模擬 實(shí)測(cè)值 開挖降水

【摘要】：近幾年因地下水處理不當(dāng)造成的深基坑事故越來越多。杭州地區(qū)不僅地下水位較高,而且土質(zhì)特殊,因此地下水的處理也就愈加棘手。深基坑開挖與降水時(shí),勢(shì)必會(huì)在土體內(nèi)引發(fā)滲流作用,改變土體內(nèi)的應(yīng)力,導(dǎo)致地表和周圍建筑物發(fā)生沉降變形�；谝陨蠁栴},做了如下工作:1、學(xué)習(xí)了滲流的基本概念和滲流計(jì)算所依據(jù)的理論方程,研究了滲流應(yīng)力耦合模型的建立過程;并對(duì)三維快速拉格朗日有限差分程序FLAC3D在滲流與應(yīng)力耦合方面的應(yīng)用進(jìn)行了介紹與分析。2、以杭州市彩虹大道B標(biāo)段鄰近地鐵隧道的深基坑工程為依托,利用FLAC3D將深基坑開挖過程中滲流與應(yīng)力耦合作用考慮在內(nèi),對(duì)深基坑開挖與降水過程對(duì)臨近隧道變形的影響進(jìn)行數(shù)值模擬。3、深入分析了該工程的實(shí)測(cè)和數(shù)值模擬結(jié)果,并將周圍建筑物位移、既有隧道變形和站臺(tái)、站廳位移的現(xiàn)場(chǎng)實(shí)測(cè)值與數(shù)值模擬結(jié)果進(jìn)行對(duì)比。對(duì)比結(jié)果顯示考慮滲流與應(yīng)力耦合作用與實(shí)際結(jié)果較為吻合。4、得出在杭州等特殊土質(zhì)地區(qū)深基坑進(jìn)行開挖降水時(shí),應(yīng)將滲流與應(yīng)力耦合作用考慮在內(nèi)的結(jié)論,可為今后類似工程提供參考。目前在臨江靠海等地下水比較發(fā)育的地區(qū),進(jìn)行深基坑開挖降水時(shí)很少考慮滲流與應(yīng)力耦合效應(yīng)的影響,但大量的實(shí)際工程表明:將滲流與應(yīng)力耦合效應(yīng)考慮在內(nèi)比較符合工程實(shí)際,能夠有效避免工程事故的發(fā)生。論文成果驗(yàn)證了在杭州特殊土質(zhì)且地下水系發(fā)育地區(qū),應(yīng)該考慮滲流與應(yīng)力耦合效應(yīng),為類似工程是否考慮滲流與應(yīng)力耦合影響提供參考。
[Abstract]:In recent years, due to groundwater treatment more and more accidents caused by improper deep excavation in Hangzhou area. Not only the underground water level is higher, and the soil quality is special, so the groundwater treatment will be more difficult. And the precipitation of deep excavation, will inevitably lead to seepage in the soil and soil stress changes in the body, leading to the surface and surrounding buildings occurred settlement deformation. Based on the above problems, do the following work: 1, learning the basic concepts and theoretical equation of seepage calculation of seepage on the basis of the research, the process of seepage force coupling model should be established; and the 3D Lagrange finite difference program FLAC3D on seepage and stress coupling were introduced and analyzed.2, deep foundation pit project in Hangzhou City Rainbow Road section B adjacent Metro Tunnel Based on the use of FLAC3D in the process of excavation of deep foundation pit seepage and stress coupling effect should be considered, for Deep foundation pit excavation and dewatering process numerical simulation of effect of.3 on the near tunnel deformation, in-depth analysis of the simulation results and the measured numerical engineering, and the buildings around the tunnel deformation and displacement, the platform, the results were compared with numerical simulation. The station Hall displacement field measured values. The results show that the seepage and stress the force coupling effect and the actual result is consistent with.4, the deep foundation pit in Hangzhou and other areas of special soil excavation and precipitation, should be and should consider the coupling effect of seepage force, the conclusion can provide reference for similar projects in the future. At present in the Linjiang sea groundwater relatively developed area, deep excavation are rarely considering the influence of seepage and stress coupling effect, but a large number of practical projects shows that the seepage and stress coupling effect into consideration compared with the engineering practice, can effectively avoid. The results of the paper confirm that the coupling effect of seepage and stress should be considered in the development of special soil and underground water development area in Hangzhou, so as to provide references for similar projects to consider the coupling effect of seepage and stress.

【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U456.3;TU753

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