地铁盾构施工对邻近地下管线的影响分析

发布时间：2018-03-29 17:14

本文选题：地铁　切入点：盾构施工　出处：《河北大学》2017年硕士论文

【摘要】：在我国随着加快城镇化进程、城市人口的增加,城市交通带来的压力逐渐明显,因此开发及利用地下空间是城市建设的大趋势。然而隧道盾构施工会扰动地下土体,进而影响城市的地下结构及管线,甚至造成管线的渗漏、损害或引起灾害和严重事故。本文以某市地铁盾构隧道下穿刚性排水管线工程作为研究对象,主要采用工程实测与ANSYS有限元模拟分析相结合的方法,对管线与周围土体相互作用压力、盾构隧道邻近地下管线沉降的实测值、盾构开挖的数值模拟计算、管线性状的影响因素等方面进行研究。本文主要研究内容如下:(1)基于工程的实测数据,研究分析了隧道工程中管线在盾构施工作用下沉降随时间的变化规律。(2)采用数值模拟方法,模拟盾构开挖对刚性管线的影响,充分考虑土体-管线-隧道间的互相作用,详细地分析了盾构隧道平行及垂直下穿地下管线时对管线的沉降影响规律,并同工程实测数据进行对比验证其可靠性。(3)采用数值模拟方法,分析了隧道平行、垂直下穿地下管线在不同因素(土质、管材、管隧间距和管线截面形式)影响下管线的沉降规律,计算结果表明,管线自身参数并不是影响其沉降的主要因素,而土质及管隧间距对其沉降有显著影响,应当加以重视。
[Abstract]:With the acceleration of urbanization and the increase of urban population in China, the pressure brought by urban traffic is gradually obvious, so the development and utilization of underground space is the main trend of urban construction. However, the tunnel shield construction will disturb the underground soil mass. Then it affects the underground structure and pipeline of the city, even causes the leakage of pipeline, damages or causes disaster and serious accident. In this paper, the project of rigid drainage pipeline under shield tunnel of a city subway is taken as the research object. Based on the method of engineering measurement and ANSYS finite element simulation, the interaction pressure between pipeline and surrounding soil, the measured value of underground pipeline settlement near shield tunnel, and the numerical simulation calculation of shield excavation are studied. The main contents of this paper are as follows: (1) based on the measured data of engineering, The variation law of pipeline settlement with time under shield tunneling is studied and analyzed. Numerical simulation method is used to simulate the influence of shield excavation on rigid pipeline, and the interaction between soil, pipeline and tunnel is fully considered. This paper analyzes in detail the influence of shield tunnel on the settlement of underground pipeline when it is parallel or vertical, and contrasts with the measured data of the project to verify its reliability. The method of numerical simulation is used to analyze the tunnel parallelism. Under the influence of different factors (soil quality, pipe material, pipe tunnel spacing and pipeline section form), the calculation results show that the parameters of the pipeline itself are not the main factors affecting the settlement. The soil quality and the spacing between pipes and tunnels have a significant effect on the settlement, which should be paid more attention to.
【学位授予单位】：河北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU990.3;U455.43;U231.3

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