棚洞结构模型试验研究

为了深入研究公路棚洞与边坡围岩体间的相互作用关系,应用基本相似模型试验,对不同边坡围岩条件、不同开挖坡率、不同回填体材料、不同边坡高度等组合情况进行试验。试验过程中,对回填体与边坡及棚洞结构间的接触应力、棚洞结构的表面应力、棚洞结构的位移等指标进行测试。模型试验结果表明,在相同边坡条件和棚洞结构条件下,土石回填相对于片石回填,棚洞结构的内力更大;相对于土质边坡,岩质边坡情况下棚洞结构受回填体材料的影响更大。

Experimental Research on Structural Models of Shed Tunnels

For the sake of deep research on interaction between shed tunnels and ways, this paper tests the combination of different conditions of slope wall rocks, slope wall rocks of highdifferent excavated slope of basically similar model and slopes and shed tun-nel structures, surface stress of shed tunnel struc＇tures and displacement of shed tunnel structures are tested. The model test result shows that the internal force of shed tunnel structures is bigger for soil and rockbackfilling comparing to rubble backfilling under the same slope conditions and shed tunnel structure conditions; and the influence of backfilling materials on shed tunnel structures is larger in the case of rock slope relative to soil slope.