基于复杂网络的盾构施工参数时间序列研究

摘要

Research purposes:Metro shield construction is a complex process,geological conditions have a major impact on the shield parameters.For the purpose of study the effect of geological conditions on the parameters of the shield,considering the stratums surrounding a certain section of a city tunnel,and the parameters that in different geological conditions were converted into a complex network,this paper studied it from microscopic and macroscopic,analyzed the evolution of the various parameters of the shield under different geological conditions.Research conclusions:(1) Verify the feasibility that transform shield parameter time series into complex networks;(2) In different geological conditions interchange,parameters network's node degree significantly increased,indicating that the shield system has greater volatility;(3) Lithostratigraphic stratum is more stable than sand formations,and gas compartment pressure is more sensitive to changes in the outside world,can be used to monitor the stability of the system;(4) This study can provide support for the formation identification.%研究目的:地铁盾构施工是一个复杂过程,地质条件对盾构参数有重要影响.为研究地质条件对盾构参数的影响,本文以某市地铁过江隧道为例,对砂性、岩性两种地质条件下的贯入度等4种参数构建复杂网络,分别从微观和宏观两个维度对其进行研究,分析不同地质条件下各种盾构参数的演化规律.研究结论:(1)验证了将地铁盾构参数时间序列转化为复杂网络进行研究的可行性;(2)在不同地质条件交汇处,各参数网络的节点度明显增大,说明盾构系统在此处有较大波动;(3)砂性地质条件下的网络相较于岩质地质条件下更不稳定,且气仓压力对外界变化更为敏感,可用于监测盾构系统的稳定性;(4)本研究可为地层识别提供支持.