摘要
文章针对自主研发的φ800 mm土压平衡式模型盾构掘进系统,详细介绍了盾构机壳体、掘削系统、螺旋出土器、推进系统和控制台5个重要部件各自的结构形式、布局特点、参数确定及具体功能等,并指出该模型盾构试验系统可根据不同的需求开展原样土体掘进试验、相似模型试验,以及盾构近接施工等复杂条件下的模拟试验;通过在原样砂土地层中的掘进试验结果,分析了地表沉降形态与发展过程及地层损失率与地层位移间的关系;运用Peck公式对地表沉降进行了计算并与试验值进行了对比,验证了该土压平衡式模型盾构掘进系统的可靠性。
The self-developed φ800 mm EPB shield model system is composed of a φ800 mm EPB shield, the driving control system, the segment lining structure, and other accessories. This paper presents the detailed description of structure type, layout feature, parameter determination and specific function etc respectively for 5 important components of the shield shell, cutting system, screw conveyor, thrusting system and control panel. By use of the model system, the excavation test in the original soil and similar model test can be carried out according to different requirements, even for approaching construction case under complex conditions. Therefore, for validation of the reliability of model system, the excavation test in original sand stratum is carried out to obtain the ground surface settlement pattern and the development process as well as the relationship between the ground loss ratio and the ground displacement; meanwhile, the ground surface settlement is calculated by Peck formula and compared with the test values, verifying the reliability of this EPB shield model system.
出处
《现代隧道技术》
EI
北大核心
2014年第4期133-140,共8页
Modern Tunnelling Technology
基金
国家973计划(No.2010CB732105)
国家自然科学基金(U1134208
U1361210)
国家科技支撑计划(No.2013BAB10B04)
关键词
土压平衡式盾构
模型试验
盾构系统组成
设计参数
地表沉降
地层损失
EPB shield tunnel
Model test
Shield testing system
Design paramenters
Ground surface settlement
Ground loss
