本文關(guān)鍵詞：雙碑隧道富水段開(kāi)挖滲流特征分析　出處：《重慶交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 分離式隧道 埋深 地下水 流固耦合 FLAC3D

【摘要】：重慶雙碑隧道所穿越山脈為中梁山，，中梁山為沙坪壩區(qū)最高山，山上魚(yú)塘、水庫(kù)數(shù)量眾多，地下水儲(chǔ)量豐富，并且地表水與地下水聯(lián)系密切；中梁山以泥質(zhì)巖、泥巖夾粉沙巖、石英粉沙巖分布為主。本文以重慶市在建雙碑隧道工程為背景，進(jìn)行了以下幾個(gè)方面的研究： ①對(duì)裂隙巖體富水?dāng)?shù)學(xué)模型作了系統(tǒng)分析，包括等效連續(xù)介質(zhì)模型、雙重介質(zhì)模型、裂隙網(wǎng)絡(luò)模型等，同時(shí)提出了與裂隙巖體地下水滲流相適應(yīng)的耦合數(shù)學(xué)模型。通過(guò)耦合效應(yīng)分析，建立起巖體中地下水與固體骨架之間的力學(xué)特征關(guān)系，從而真實(shí)地反映圍巖實(shí)際工作狀態(tài)。 ②運(yùn)用鏡像法求解了隧道工程中幾種比較常見(jiàn)的不良地質(zhì)條件下的穩(wěn)定滲流問(wèn)題。其中包括：隧道下臥隔水層、隧道附近存在斷層、隧道附近存在溶洞。同時(shí)利用復(fù)變函數(shù)保角變換原則，推導(dǎo)了重力場(chǎng)作用下均質(zhì)連續(xù)圍巖中隧道滲流場(chǎng)分布方程。 ③利用有限差分軟件FLAC3D建立雙碑隧道三維數(shù)值分析模型，通過(guò)計(jì)算分析，揭示了隧道開(kāi)挖過(guò)程地下水壓分布規(guī)律，以及滲流作用對(duì)圍巖應(yīng)力和變形的影響。同時(shí)對(duì)影響裂隙巖體流固耦合效應(yīng)的主要因素，包括不同圍巖級(jí)別、不同埋深、不同地下水位等，分別進(jìn)行了數(shù)值模擬分析，揭示了圍巖受力及變形在單一因素影響下的變化規(guī)律。 ④對(duì)現(xiàn)場(chǎng)監(jiān)控量測(cè)數(shù)據(jù)進(jìn)行了分析，同時(shí)與處在三種不同地下水位下的數(shù)值模擬結(jié)果進(jìn)行了對(duì)比分析，對(duì)模擬結(jié)果的合理性作出判定。
[Abstract]:Chongqing Shuangbei tunnel through mountains in Liangshan, in Liangshan for the Shapingba mountain area, Hill ponds, reservoirs are numerous, groundwater reserves are abundant, and closely contact surface water and groundwater in Liangshan; mud rock, mudstone and siltstone, sandstone and quartz powder distribution. This paper takes Chongqing city construction Shuangbei tunnel project as background, focuses on the following aspects:
As the system analysis of the fractured rock rich water mathematical model, including the equivalent continuous medium model and double medium model, fracture network model, and puts forward to adapt with the coupled mathematical model of groundwater seepage in fractured rock. Through coupling effect analysis, establish the relationship between groundwater and solid mechanics characteristic of rock mass, so true to reflect the actual working state of the surrounding rock.
Using the image method to solve the seepage problem of adverse geological conditions of tunnel engineering in some of the more common conditions. Including: tunnel underlying aquiclude, faults near the tunnel, karst cave near the tunnel. At the same time using conformal transformation principle, homogeneous rock derived gravity field in tunnel seepage distribution equation.
The establishment of the Shuangbei tunnel using finite difference numerical analysis model of software FLAC3D, through calculation and analysis, reveals the tunnel excavation process of underground water distribution, seepage and stress and deformation of surrounding rock. At the same time, the main factors affecting the coupling effect of fractured rock, including different rock mass, different depth. Different underground water level, numerical simulations were carried out analysis, reveals the surrounding rock stress and deformation variation in a single factor.
Fourth, the field monitoring data are analyzed, and the numerical simulation results are compared with those under three different groundwater levels, and the rationality of the simulation results is determined.

【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U455.49

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