本文選題：特大斷面隧道 + 開挖方法　； 參考：《福建工程學院》2017年碩士論文

【摘要】：論文以我國在大規(guī)模修建的城市地鐵隧道為背景,采用了技術(shù)調(diào)研、理論分析、數(shù)值模擬、監(jiān)控量測等多種手段,對特大斷面隧道開挖方法優(yōu)化、特大斷面隧道施工過程力學性態(tài)仿真、特大斷面隧道施工圍巖穩(wěn)定監(jiān)控量測等進行了深入系統(tǒng)地研究,主要研究工作和成果如下:(1)通過分析臺階法的原理,并依此構(gòu)建了統(tǒng)一的水平分層模型。該模型可以通過調(diào)整分層數(shù)和臺階高度有效地解釋比如三臺階法等分層類施工方法,并進行基于AHP方法的方案優(yōu)化比選舉例,在考慮地表沉降、掌子面擠出、施工難度和開挖尺寸四個準則情況下,選出了最優(yōu)開挖方案。(2)通過分析常見施工方法CD法和CRD法等,類比水平分層模型構(gòu)建了統(tǒng)一的橫向分塊模型,該模型可以通過調(diào)整橫向分塊數(shù)和分塊寬度有效地解釋和優(yōu)化各類橫向分塊類的施工方法。(3)通過綜合水平分層模型和橫向分塊模型構(gòu)建了統(tǒng)一的平面分區(qū)模型,該模型可以通過水平分層數(shù)、橫向分快數(shù)、臺階高度、分塊寬度等四個參數(shù)解釋平面優(yōu)化的所有問題,同時對并進行了當i=2,j=2時平面分區(qū)模型利用動態(tài)規(guī)劃理論(DP)進行了方案優(yōu)化舉例。(4)通過分析開挖進尺問題,類比平分層模型和橫向分塊模型構(gòu)建了統(tǒng)一的縱向分段模型,主要確定參數(shù)分段數(shù)和分段長度,同時也基于AHP進行了分析優(yōu)化方案。(5)通過綜合平面分區(qū)模型和縱向分段優(yōu)化模型可以得到三維分體模型,該模型可以解釋和用于所有隧道開挖方法和優(yōu)化問題。通過調(diào)整水平分層數(shù)、橫向分快數(shù)、臺階高度、分塊寬度、分段數(shù)和分段長度等六個參數(shù)可以解釋所有施工方法并能夠依此進行隧道開挖方法的優(yōu)化。(6)綜合了動態(tài)規(guī)劃理論(DP)和層次分析法(AHP)的各自優(yōu)點,在特大斷面隧道開挖方法優(yōu)化中,將隧道開挖多目標多過程的問題,通過DP_AHP法能夠有效進行優(yōu)化和決策,從而有效解決,最終提出最優(yōu)的施工方案。(7)本文對重慶地鐵十號線中央公園東站大斷面隧道開挖進行了優(yōu)化前后方案數(shù)值仿真計算。分別從位移場、應力場和塑性區(qū)的分析了優(yōu)化前后圍巖穩(wěn)定變形破壞規(guī)律。發(fā)現(xiàn)對于施工方法的優(yōu)化,滿足施工要求。(8)對重慶軌道交通十號線中央公園東站特大斷面隧道采用9步開挖工藝方法施工進行監(jiān)控量測,對監(jiān)控量測結(jié)果與數(shù)值模擬結(jié)果進行對比分析。結(jié)果表明前面做的9部開挖法優(yōu)化方案有效,變形規(guī)律相同和變形量處于同一數(shù)量水平。
[Abstract]:Based on the large-scale construction of urban subway tunnel in our country, this paper optimizes the excavation method of the tunnel with large cross-section by means of technical investigation, theoretical analysis, numerical simulation, monitoring and measurement, etc. The mechanical behavior simulation of the construction process of the large section tunnel and the monitoring and measurement of the surrounding rock stability in the construction of the large section tunnel are deeply and systematically studied. The main research work and results are as follows: 1) through the analysis of the principle of the step method, Based on this, a unified horizontal stratification model is constructed. The model can effectively explain the layered construction methods such as three class method by adjusting the number of layers and the height of step, and compare and select the scheme optimization based on AHP method, considering the ground subsidence and the extrusion of palm surface. Under four criteria of construction difficulty and excavation size, the optimal excavation scheme is selected. By analyzing the common construction methods CD method and CRD method, a unified horizontal block model is constructed by analogy with horizontal stratification model. The model can effectively explain and optimize the construction method of all kinds of transverse block classes by adjusting the number and width of transverse blocks. The unified plane partition model is constructed by synthesizing the horizontal stratification model and the horizontal block model. The model can explain all the problems of plane optimization by four parameters, such as horizontal stratification number, lateral fast number, step height, block width, etc. At the same time, the paper gives an example of scheme optimization by using dynamic programming theory to optimize the plan of the plane partition model with the help of dynamic programming theory (DP2). By analyzing the problem of the excavation scale, a unified longitudinal segmenting model is constructed by analogy with the horizontal stratification model and the horizontal block model, and is compared with the horizontal stratification model and the horizontal block model. This paper mainly determines the number of segments and the length of the segments, and also analyzes the optimization scheme based on AHP. (5) by synthesizing the planar partition model and the longitudinal segmented optimization model, the three-dimensional split-body model can be obtained. The model can be interpreted and applied to all tunnel excavation methods and optimization problems. By adjusting the number of horizontal layers, the number of transversal splitters, the height of steps, the width of blocks, The six parameters, such as segment number and segment length, can explain all construction methods and can be used to optimize tunnel excavation method. It integrates the respective advantages of dynamic programming theory (DPDP) and analytic hierarchy process (AHP). In the optimization of tunnel excavation method with large section, the problem of multi-objective and multi-process of tunnel excavation can be solved effectively by DP_AHP method. Finally, the optimal construction plan is put forward.) in this paper, the numerical simulation of the large section tunnel excavation of the Central Park East Station of Chongqing Metro Line 10 is carried out before and after optimization. According to the displacement field, stress field and plastic zone, the stable deformation and failure law of surrounding rock before and after optimization are analyzed. It is found that for the optimization of the construction method to meet the construction requirements, the monitoring and measurement of the construction of the extraordinarily large section tunnel of the Central Park East Station of Chongqing Rail Transit Line 10 using the 9-step excavation technology method is carried out. The results of monitoring measurement and numerical simulation are compared and analyzed. The results show that the nine excavation methods are effective, the deformation law is the same and the deformation quantity is at the same level.
【學位授予單位】：福建工程學院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U456.3

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