本文選題：隧道圍巖 + 不確定性��； 參考：《湖南大學(xué)》2015年碩士論文

【摘要】：隨著我國國民經(jīng)濟(jì)和國防建設(shè)的迅速發(fā)展,地下空間的開發(fā)與利用成為了一種必然的趨勢。地下洞室開挖及支護(hù)后的穩(wěn)定性關(guān)系到工程施工及運(yùn)營期間的安全,是工程領(lǐng)域重要研究內(nèi)容之一。然而,深部隧道由于其賦存的特殊地質(zhì)環(huán)境,在“三高一擾”的影響下,巖體力學(xué)性質(zhì)表現(xiàn)出高度的離散性和各向異性,設(shè)計(jì)時必須考慮參數(shù)的不確定性,這給隧道圍巖的穩(wěn)定性評價帶來了一定難度。針對地下結(jié)構(gòu)不確定性的特點(diǎn),本文引入了非確定性結(jié)構(gòu)設(shè)計(jì)的穩(wěn)健設(shè)計(jì)方法,包括穩(wěn)健試驗(yàn)設(shè)計(jì)和穩(wěn)健可靠度分析。主要研究內(nèi)容如下:首先,本文介紹了穩(wěn)健設(shè)計(jì)概念,引入田口“三次設(shè)計(jì)”方法。根據(jù)相似原則配制模型試驗(yàn)材料,選擇正交表進(jìn)行配比試驗(yàn)。將試塊單軸抗壓強(qiáng)度作為質(zhì)量特性指標(biāo),由望大特性的信噪比函數(shù)將質(zhì)量特性指標(biāo)轉(zhuǎn)化為信噪比,通過信噪比分析材料配比對質(zhì)量特性的影響。其次,引入Info-gap理論,深入研究支護(hù)圍巖穩(wěn)健可靠度分析方法。采用Info-gap模型描述不確定參數(shù)實(shí)際值在名義值附近的波動,并將結(jié)構(gòu)失效前能夠允許的不確定參量的最大波動幅值作為穩(wěn)健可靠度指標(biāo)。在Info-gap模型的基礎(chǔ)上,進(jìn)一步研究了穩(wěn)健優(yōu)化模型。穩(wěn)健優(yōu)化采用Info-gap穩(wěn)健函數(shù)來衡量設(shè)計(jì)結(jié)果對約束條件的穩(wěn)健性。通過移動約束函數(shù)法將不確定性設(shè)計(jì)變量轉(zhuǎn)化為一系列確定性優(yōu)化,使結(jié)構(gòu)在滿足優(yōu)化的同時具有一定的穩(wěn)健性。最后,分析了圍巖強(qiáng)度破壞和失穩(wěn)破壞,通過剪切滑移線場理論和組合拱理論推導(dǎo)了理想彈塑性圍巖的極限承載能力,并得到地下結(jié)構(gòu)穩(wěn)定分析的功能函數(shù),建立了支護(hù)圍巖穩(wěn)健分析流程。實(shí)例工程展示了穩(wěn)健可靠性方法的具體操作程序。分析了圍巖力學(xué)參數(shù)和支護(hù)性能對支護(hù)結(jié)構(gòu)穩(wěn)健性的影響,探究了內(nèi)摩擦角和粘聚力對結(jié)構(gòu)穩(wěn)健性能影響的重要程度。該方法對參數(shù)信息要求低,只需要知道參數(shù)取值的邊界,因而在處理地下結(jié)構(gòu)不確定性問題時,具有一定的優(yōu)勢。
[Abstract]:With the rapid development of national economy and national defense construction, the development and utilization of underground space has become an inevitable trend. The stability of underground caverns after excavation and support is related to the safety of construction and operation, and is one of the important research contents in engineering field. However, due to the special geological environment of deep tunnel, under the influence of "three high and one disturbance", the mechanical properties of rock mass show high dispersion and anisotropy, and the uncertainty of parameters must be taken into account in the design. This brings some difficulty to the stability evaluation of tunnel surrounding rock. In view of the uncertainty of underground structure, this paper introduces the robust design method of non-deterministic structure design, including robust test design and robust reliability analysis. The main contents are as follows: firstly, this paper introduces the concept of robust design and introduces Taguchi's cubic design method. According to the principle of similarity, the model test materials were prepared, and the orthogonal table was selected to carry out the proportioning test. The uniaxial compressive strength of the test block is taken as the quality characteristic index, and the quality characteristic index is converted from the signal-to-noise ratio function of the large characteristic to the signal-to-noise ratio. The influence of the material ratio on the quality characteristic is analyzed by the signal-to-noise ratio (SNR). Secondly, Info-gap theory is introduced to analyze the robust reliability of surrounding rock. The Info-gap model is used to describe the fluctuation of the actual value of uncertain parameters near the nominal value, and the maximum fluctuation amplitude of the uncertain parameter which can be allowed before the failure of the structure is taken as the robust reliability index. Based on the Info-gap model, the robust optimization model is further studied. Robust optimization uses the Info-gap robust function to measure the robustness of the design results to the constraints. The uncertain design variables are transformed into a series of deterministic optimization by moving constraint function method, which makes the structure have a certain robustness while satisfying the optimization. Finally, the strength failure and instability failure of surrounding rock are analyzed, the ultimate bearing capacity of ideal elastoplastic surrounding rock is deduced by the theory of shear slip line field and combined arch theory, and the function function of stability analysis of underground structure is obtained. The steady analysis flow of supporting surrounding rock is established. The concrete operation procedure of the robust reliability method is demonstrated by an example project. The influence of mechanical parameters of surrounding rock and supporting performance on the robustness of supporting structure is analyzed, and the importance of the influence of internal friction angle and cohesive force on structural robustness is explored. This method only needs to know the boundary of parameter value because of its low requirement for parameter information, so it has some advantages in dealing with the uncertainty of underground structure.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U451

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王常金;;東皇廟隧道冒頂坍塌事故分析及處理方案探討[J];交通科技;2015年01期

2 黃仁;邱志平;;結(jié)構(gòu)靜力分析的區(qū)間攝動有限元法[J];工程力學(xué);2013年12期

3 張強(qiáng)勇;張緒濤;向文;陳旭光;曹冠華;許孝濱;;不同洞形與加載方式對深部巖體分區(qū)破裂影響的模型試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報;2013年08期

4 文澤軍;張帆;劉厚才;陳立鋒;胡佳;;基于Taguchi正交試驗(yàn)與3DCS的車燈前罩裝配銷孔定位布局穩(wěn)健設(shè)計(jì)[J];汽車工程學(xué)報;2013年04期

5 李昆鋒;楊自春;周宗和;;引入集合擴(kuò)展約束的結(jié)構(gòu)非概率可靠性模型[J];機(jī)械強(qiáng)度;2013年03期

6 李昆鋒;楊自春;;基于info-gap理論的結(jié)構(gòu)非概率可靠性方法研究[J];機(jī)械強(qiáng)度;2013年02期

7 曹文貴;李媛;翟友成;;基于Info-Gap理論的基樁下伏巖溶頂板穩(wěn)定性的主動分析方法[J];巖石力學(xué)與工程學(xué)報;2013年02期

8 邵國建;蘇靜波;;區(qū)間可靠性分析方法及在地下隧道結(jié)構(gòu)計(jì)算中的應(yīng)用[J];計(jì)算力學(xué)學(xué)報;2013年01期

9 孟波;靖洪文;陳坤福;蘇海健;楊圣奇;李元海;;軟巖巷道圍巖剪切滑移破壞機(jī)理及控制研究[J];巖土工程學(xué)報;2012年12期

10 李利平;李術(shù)才;趙勇;李樹忱;王漢鵬;劉欽;趙巖;原小帥;;超大斷面隧道軟弱破碎圍巖漸進(jìn)破壞過程三維地質(zhì)力學(xué)模型試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報;2012年03期

相關(guān)博士學(xué)位論文 前3條

1 孟波;軟巖巷道破裂圍巖錨固體承載特性及工程應(yīng)用研究[D];中國礦業(yè)大學(xué);2013年

2 張茂林;斷續(xù)節(jié)理巖體破裂演化特征與錨固控制機(jī)理研究[D];中國礦業(yè)大學(xué);2013年

3 唐雄俊;隧道收斂約束法的理論研究與應(yīng)用[D];華中科技大學(xué);2009年

相關(guān)碩士學(xué)位論文 前4條

1 陳兆;公路隧道施工監(jiān)測及圍巖穩(wěn)定性概率分析方法研究[D];湖南大學(xué);2008年

2 鄒志鵬;基于圍巖模糊分類的地下工程穩(wěn)定性可靠度分析[D];湖南大學(xué);2007年

3 鄭國江;不同應(yīng)力場軟弱圍巖連拱隧道力學(xué)性狀試驗(yàn)研究[D];長安大學(xué);2006年

4 魏巍;穩(wěn)健設(shè)計(jì)在低剪力墻抗剪強(qiáng)度分析中的應(yīng)用[D];大連理工大學(xué);2003年

，

本文編號：1807035