摘要
膨胀土地层受地下水影响较大,具有显著的吸水膨胀和失水收缩的变形性能,若处理不当容易给穿越该区的隧道工程带来巨大的技术难题,极易出现地面开裂、塌陷、隆起等工程病害。为了探究膨胀土地层对大直径盾构隧道结构的影响,以扬州瘦西湖盾构隧道穿越膨胀土地层为背景,通过对盾构隧道的健康监测与数据分析,结合膨胀土的试验结果,开展膨胀土地层大直径盾构隧道地层变形规律、管片内力及所受土压力变化研究。研究结果发现膨胀土性质极大地影响了土压及地层沉降变化。扬州瘦西湖盾构隧道健康监测的主要成果能够为今后类似工程提供可靠的分析评价资料和科学的安全预测依据。
The expansive soil layer, which is greatly affected by groundwater, has considerable deformation performance of water swelling and water shrinking. It will give rise to great technical difficulties in the tunneling works crossing the expansive soil layer if handled improperly, and will easily cause engineering diseases such as cracking, collapse and uplift of the ground. In order to explore the influence of expansive soil layer on the construction of large-diameter shield tunnel, the Slender West Lake shield tunnel in Yangzhou is taken as an example. Through the health monitoring and data analysis of the shield tunnel, and combined with the test results of expansive soil, the study on deformation law and internal pressure change as well as pressure of soil under large-diameter shield tunnel will be carried out. The results show that the properties of expansive soil affect the change of earth pressure and formation subsidence greatly, and the main results of health monitoring in Yangzhou Slender West Lake shield tunnel could provide reliable analysis and evaluation data as well as scientific safety prediction basis for similar projects in the future.
作者
张斌
Zhang Bin(China Railway 14^th Bureau Group Co.Ltd.,Jinan Shandong 250014,China)
出处
《铁道建筑技术》
2018年第7期60-64,68,共6页
Railway Construction Technology
基金
中国铁建股份有限公司科技研发计划项目(12-C16)
关键词
膨胀土地层
大直径盾构
盾构隧道
健康监测
数据分析
expansive soil layer
large-diameter shield
shield tunnel
health monitoring
data analysis
