长株潭城际铁路土压平衡盾构掘进参数适配性研究

发布时间：2018-12-07 11:18

【摘要】：摘要：长株潭城际铁路作为连接三个城市最快捷、方便的交通方式,其综合Ⅰ标盾构段选用土压平衡盾构施工。盾构穿越地层主要为泥质砂岩和砂质板岩,沿线穿越大量房屋建筑群、湘江、地层不整合接触带等关键地段,如何有效控制盾构掘进参数十分重要。本文以铁道部课题“铁路水下隧道盾构施工关键技术研究”(2011G013-C)为背景,对标段关键地段的掘进参数的适配性进行系统的研究,并进行优化分析。主要研究内容有： (1)针对长株潭城际铁路综合Ⅰ标滨江新城-开福寺盾构区间的地质特点,结合地层岩土颗粒及水压、渗透性等因素,泥质砂岩及砂质板岩地层特征,选择盾构机选型。在参考国内外盾构掘进参数的取值范围和相关文献的基础上,对盾构主要掘进参数进行初步计算。 (2)选取土舱压力、壁后注浆压力和掘进速度三个主要掘进参数进行相关适配性研究。研究三个参数之间的主次关系,采用正交试验设计方法对试验进行设计。 (3)利用FLAC3D有限差分法软件对盾构穿越岳北社区D栋进行数值模拟。以正交试验确定的试验组数为模拟工况,对各工况下不同掘进参数进行数值模拟,分析计算结果。总结出该段三个主要掘进参数较为适宜的掘进值。采用数学统计方法对数值模拟结果进行分析。进一步确定参数的主次关系和显著性。 (4)通过现场掘进参数的统计分析,对长株潭城际铁路综合Ⅰ标滨-开盾构区间,盾构穿越重要建(构)筑物、湘江段、地层不整合接触带等地段的掘进参数进行优化,为后续工程掘进参数的设定提供参考。
[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.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.43

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