【摘要】：摘要：長株潭城際鐵路作為連接三個城市最快捷、方便的交通方式,其綜合Ⅰ標(biāo)盾構(gòu)段選用土壓平衡盾構(gòu)施工。盾構(gòu)穿越地層主要為泥質(zhì)砂巖和砂質(zhì)板巖,沿線穿越大量房屋建筑群、湘江、地層不整合接觸帶等關(guān)鍵地段,如何有效控制盾構(gòu)掘進(jìn)參數(shù)十分重要。本文以鐵道部課題“鐵路水下隧道盾構(gòu)施工關(guān)鍵技術(shù)研究”(2011G013-C)為背景,對標(biāo)段關(guān)鍵地段的掘進(jìn)參數(shù)的適配性進(jìn)行系統(tǒng)的研究,并進(jìn)行優(yōu)化分析。主要研究內(nèi)容有： (1)針對長株潭城際鐵路綜合Ⅰ標(biāo)濱江新城-開福寺盾構(gòu)區(qū)間的地質(zhì)特點(diǎn),結(jié)合地層巖土顆粒及水壓、滲透性等因素,泥質(zhì)砂巖及砂質(zhì)板巖地層特征,選擇盾構(gòu)機(jī)選型。在參考國內(nèi)外盾構(gòu)掘進(jìn)參數(shù)的取值范圍和相關(guān)文獻(xiàn)的基礎(chǔ)上,對盾構(gòu)主要掘進(jìn)參數(shù)進(jìn)行初步計(jì)算。 (2)選取土艙壓力、壁后注漿壓力和掘進(jìn)速度三個主要掘進(jìn)參數(shù)進(jìn)行相關(guān)適配性研究。研究三個參數(shù)之間的主次關(guān)系,采用正交試驗(yàn)設(shè)計(jì)方法對試驗(yàn)進(jìn)行設(shè)計(jì)。 (3)利用FLAC3D有限差分法軟件對盾構(gòu)穿越岳北社區(qū)D棟進(jìn)行數(shù)值模擬。以正交試驗(yàn)確定的試驗(yàn)組數(shù)為模擬工況,對各工況下不同掘進(jìn)參數(shù)進(jìn)行數(shù)值模擬,分析計(jì)算結(jié)果�？偨Y(jié)出該段三個主要掘進(jìn)參數(shù)較為適宜的掘進(jìn)值。采用數(shù)學(xué)統(tǒng)計(jì)方法對數(shù)值模擬結(jié)果進(jìn)行分析。進(jìn)一步確定參數(shù)的主次關(guān)系和顯著性。 (4)通過現(xiàn)場掘進(jìn)參數(shù)的統(tǒng)計(jì)分析,對長株潭城際鐵路綜合Ⅰ標(biāo)濱-開盾構(gòu)區(qū)間,盾構(gòu)穿越重要建(構(gòu))筑物、湘江段、地層不整合接觸帶等地段的掘進(jìn)參數(shù)進(jìn)行優(yōu)化,為后續(xù)工程掘進(jìn)參數(shù)的設(shè)定提供參考。
[Abstract]:Abstract: Changsha-Zhuzhou-Xiangtan Intercity Railway is the quickest and convenient way to connect the three cities. Shield tunneling is mainly composed of argillaceous sandstone and sand slate. It is very important to control the tunneling parameters effectively through a large number of building buildings, Xiangjiang River and strata unconformity contact zone. In this paper, based on the research on the key technology of shield tunneling construction in railway underwater tunnel (2011G013-C) of the Ministry of Railways, the adaptability of the tunneling parameters in the key sections of the subsea railway tunnel is studied systematically, and the optimization analysis is carried out. The main research contents are as follows: (1) aiming at the geological characteristics of the intercity railway integrated with Changsha-Zhuzhou-Xiangtan Intercity Railway I, combining the geological characteristics of the new riverside city-Kaifusi shield section, combined with the factors such as formation rock and soil particles, water pressure, permeability and so on, Argillaceous sandstone and sand slate are selected as shield machine. On the basis of reference to the range of shield tunneling parameters at home and abroad and related literatures, the main tunneling parameters of shield tunneling are preliminarily calculated. (2) three main tunneling parameters, soil chamber pressure, backwall grouting pressure and tunneling speed, are selected to study the adaptability. The primary and secondary relationships among the three parameters were studied, and the orthogonal design method was used to design the test. (3) numerical simulation of shield tunneling through D building in Yuebei Community by FLAC3D finite difference method. Taking the number of test groups determined by orthogonal test as the simulation condition, the numerical simulation of different tunneling parameters under each working condition is carried out, and the results are analyzed. Sum up the three main tunneling parameters of the more appropriate tunneling value. The numerical simulation results are analyzed by mathematical statistical method. Further determine the primary and secondary relationship and significance of the parameters. (4) based on the statistical analysis of driving parameters on site, the tunneling parameters of the integrated section of Changsha-Zhuzhou-Xiangtan Intercity Railway I, the shield passing through important building (construction), the Xiangjiang section, the stratum unconformity contact zone, and so on, are optimized. It provides a reference for the setting of tunneling parameters in the following engineering.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U455.43

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