本文選題：黃河三角洲地區(qū) + 復(fù)合土釘墻�。� 參考：《中國石油大學(xué)(華東)》2014年碩士論文

【摘要】：復(fù)合土釘墻支護(hù)技術(shù),克服了土釘支護(hù)的局限性,因其經(jīng)濟(jì)可靠、快速簡便的特點(diǎn),在深基坑開挖施工中得到愈來愈多的應(yīng)用。目前,復(fù)合土釘墻支護(hù)的理論研究落后于工程實(shí)踐。有限元分析方法用于支護(hù)研究的主要困難在于選擇合適的計(jì)算模型和輸入?yún)?shù)。結(jié)合實(shí)際工程,把數(shù)值模擬和實(shí)測數(shù)據(jù)結(jié)合起來,利用有限元分析方法研究支護(hù)工程的變形和力學(xué)特征,對復(fù)合土釘墻支護(hù)技術(shù)的理論研究、支護(hù)設(shè)計(jì)方案的選擇和技術(shù)論證具有重要的意義。作者總結(jié)了前人在復(fù)合土釘墻支護(hù)方面的研究成果,以東營市某基坑工程為基礎(chǔ),根據(jù)其特殊的軟土地質(zhì)條件,進(jìn)行基坑的設(shè)計(jì)施工與監(jiān)測,并利用有限元軟件ANSYS建立有限元模型進(jìn)行數(shù)值模擬,比較模擬和實(shí)際監(jiān)測結(jié)果,對復(fù)合土釘墻支護(hù)在黃河三角洲地區(qū)的應(yīng)用進(jìn)行了探討研究。主要工作如下:(1)對于基坑工程的設(shè)計(jì)、施工與監(jiān)測等工作環(huán)節(jié)進(jìn)行總結(jié)分析。首先根據(jù)其工程概況、地質(zhì)條件及周邊環(huán)境,進(jìn)行多種支護(hù)形式的綜合比較,選擇了復(fù)合土釘支護(hù)體系;對于復(fù)合土釘墻支護(hù)體系進(jìn)行分段支護(hù)設(shè)計(jì),并驗(yàn)算其穩(wěn)定性;其次對本基坑工程的施工及組織管理進(jìn)行簡述,提出本基坑工程監(jiān)測方案,最后對監(jiān)測結(jié)果進(jìn)行分析。(2)利用ANSYS軟件建立模型,模擬分析不同工況條件下實(shí)際工程的變形特征。研究表明,坑壁水平位移和基坑隆起位移之間存在一定的聯(lián)合關(guān)系。土釘?shù)氖芰哂虚_挖效應(yīng),工程應(yīng)用中應(yīng)該及時安置土釘以使土釘盡快發(fā)揮作用,減小基坑開挖過程中的基坑變形。
[Abstract]:The composite soil nailing wall support technology has overcome the limitation of soil nailing support and has been applied more and more in the construction of deep foundation pit because of its economic reliability and rapidity and simplicity. At present, the theoretical study of composite soil nailing wall support lags behind engineering practice. The main difficulty of finite element analysis in supporting research lies in the selection of appropriate calculation model and input parameters. Combined with the actual engineering, the numerical simulation and the measured data are combined, the deformation and mechanical characteristics of the supporting engineering are studied by using the finite element analysis method, and the theoretical research on the supporting technology of the composite soil nailing wall is made. The selection of supporting design scheme and technical demonstration are of great significance. Based on a foundation pit project in Dongying city and according to its special soft soil geological conditions, the author summarizes the research results of the composite soil nailing wall support, and carries out the design, construction and monitoring of the foundation pit according to its special soft soil geological conditions. The application of composite soil nailing wall support in the Yellow River Delta region is studied by using the finite element software ANSYS to establish the finite element model to carry on the numerical simulation, compares the simulation and the actual monitoring result. The main work is as follows: 1) summing up and analyzing the design, construction and monitoring of foundation pit engineering. Firstly, according to the general situation of its engineering, geological conditions and surrounding environment, the composite soil nailing support system is selected according to the comprehensive comparison of various supporting forms, and the design of the composite soil nailing wall support system is carried out, and the stability of the composite soil nailing wall support system is checked and calculated. Secondly, the construction and organization and management of the foundation pit engineering are briefly described, and the monitoring scheme of the foundation pit engineering is put forward. Finally, the monitoring results are analyzed. Finally, the model is established by using ANSYS software, and the deformation characteristics of the actual engineering under different working conditions are simulated and analyzed. The study shows that there is a certain joint relationship between horizontal displacement of pit wall and displacement of foundation pit uplift. The stress of soil nailing has excavation effect. Soil nailing should be placed in time in engineering application in order to make soil nailing play its role as soon as possible and reduce the deformation of foundation pit during excavation.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU476

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