Representing settlement for soft ground tunneling
Representing settlement for soft ground tunneling
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发表时间：
1995
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通讯作者：
T. Aoyagi
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作者：
T. Aoyagi
隧道施工辅助决策系统(DAT)的基本目的是处理隧道工程规划中的不确定条件，并提供有关施工成本和工期的有效信息。由于DAT是为在坚硬岩石中开挖隧道而开发的，因此该程序不能考虑软基隧道开挖中的地表移动。在本论文中，开发了一个可以利用DAT来预测软基隧道施工中的地表移动的程序。影响地表移动的因素与地质条件、隧道尺寸和施工方法有关。在众多的地面运动中，本文主要关注的是沉降剖面。采用O‘Reilly和New(1982)提出的经验公式作为预测模型，将沉降剖面与地表移动因素联系起来。该模型是将公式中的参数、失土量和沉降槽宽度与地基条件和施工程序联系起来建立的。该沉降模型已用C语言编写，并结合到麻省理工学院开发的现有DAT程序中。可以在图形界面上显示横向和纵向的沉降剖面。这些预测的沉降剖面为选择影响隧道工程成本和工期的施工方法和程序提供了重要信息。论文导师：赫伯特·H·爱因斯坦博士头衔：土木与环境工程学教授
The basic purpose of Decision Aids for Tunneling (DAT) is to deal with uncertain conditions in planning a tunnel project and to give effective information on construction cost and duration. Since the DAT have been developed for tunneling in hard rock, the program can not consider ground movement in soft ground tunneling. In this thesis, a program which allows one to predict ground movements in soft ground tunneling by using the DAT, was developed. The factors influencing ground movement are associated with the geological conditions, tunnel dimensions, and construction methods. Among the many ground movements, this thesis focuses on the settlement profile. The empirical equation proposed by O'Reilly and New (1982) is used as a predictive model to relate the settlement profile to factors of ground movement. This settlement model is developed by associating the parameters of the equation, the volume of lost ground and the width of the settlement trough, with the ground conditions and construction procedures. The settlement model has been coded in the C programming language and incorporated in the existing DAT program which was developed at MIT. It is possible to illustrate a settlement profile in a transverse section and in a longitudinal section on the graphic interface. Such predicted settlement profiles provide significant information in the selection of the construction methods and procedures affecting the cost and duration of tunnel projects. Thesis Supervisor: Dr. Herbert H. Einstein Title: Professor of Civil and Environmental Engineering