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在现有建筑物的紧下面开挖隧洞,或在现有隧洞附近兴建新的建筑物,在确定设计荷载时,必须考虑建筑物基础应力的传递。本文就园形隧洞附近有底脚基础的情况研究了荷载传递对隧洞与围土相互作用的影响。研究系以在波恩鲁尔大学土工离心机上所作的一系列物理模型试验为基础。把试验结果同隧洞设计通常采用的电算结果作了比较。对离心模型试验和电算的边界条件作了说明。针对隧洞设计,对主要研究结果作了解释。
Excavating a tunnel immediately below an existing building or building a new one near an existing tunnel must take into account the transfer of building foundation stresses when determining the design load. In this paper, the effect of load transfer on the interaction between tunnel and surrounding soil is studied in the case of footed foundation near circular tunnel. The research department is based on a series of physical model tests performed on a geotechnical centrifuge at the University of Bonn. The result of the experiment is compared with the calculation result commonly used in tunnel design. The centrifugal model test and calculation of the boundary conditions are described. For the tunnel design, the main findings are explained.