高填方输煤暗道周边土压力试验研究

发布时间：2018-04-04 15:31

本文选题：高填方　切入点：土压力　出处：《岩土力学》2014年06期

【摘要】：高填方暗道在西部沟壑地区得到越来越广泛的应用,但有关高填方暗道周边土压力分布的计算尚不十分清楚,需要进一步研究。通过对山西平朔东露天煤矿输煤暗道周边土压力现场测试资料分析,得出了高填方输煤暗道周边土压力分布和变化规律,对暗道周边的应力状态有了更为清晰地了解。试验结果表明,高填方暗道结构顶部存在竖向土压力集中现象,高填方暗道侧部竖向土压力分布呈现如下规律:当填土高度较低时,土压力随填土高度增加较快;当填土高度较大时变化缓慢。高填方暗道竖向土压力计算时,当填土高度较低时,宜采用土柱法;填土高度较大时宜选用顾安全公式法。与暗道结构相比,公路桥涵与地下埋管尺寸和刚度较大,建议计算侧向土压力系数采用静止土压力系数。
[Abstract]:The high fill tunnel is more and more widely used in the western gully area, but the calculation of the earth pressure distribution around the high fill tunnel is not very clear and needs further study.Based on the field test data analysis of the surrounding earth pressure around the dark road of coal transportation in Pingshuo East opencast Coal Mine, Shanxi Province, the distribution and variation law of the earth pressure around the dark road of high filling coal transportation are obtained, and the stress state around the dark road is more clearly understood.The experimental results show that the vertical earth pressure concentration exists at the top of the high fill tunnel structure, and the vertical earth pressure distribution at the side of the high fill tunnel is as follows: when the fill height is low, the earth pressure increases rapidly with the filling height;When the fill height is high, the change is slow.In the calculation of vertical earth pressure of high fill tunnel, when the height of fill is low, the method of soil column should be used, and the method of safety formula should be used when the height of fill is larger.Compared with the underground tunnel structure, the dimension and stiffness of the buried pipe in the highway bridge and culvert are larger. It is suggested that the static earth pressure coefficient should be used to calculate the lateral earth pressure coefficient.
【作者单位】：西安建筑科技大学土木工程学院;中国有色金属工业西安勘察设计研究院;中国轻工业西安设计工程有限责任公司;
【基金】：国家自然科学基金资助项目(No.51078309,No.51178380)
【分类号】：TU432

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