DISPLACEMENT MEASUREMENT OF TUNNEL SURROUNDING ROCK AND FINITE ELEMENT ANALYSIS METHOD
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摘要: 介绍了湖北长阳县某工程隧洞施工变形监测断面的布设方式、位移监测结果及其对设计与施工的指导作用。变形监测结果说明锚喷支护的手段作为完整的石灰岩段的永久支护是可行的,作为页岩施工期临时支护也是有效的,但不能作为页岩段的永久支护手段。然后利用实测岩体位移,采用有限元法,反算出岩体的平均弹性模量ER灰为5.2×104kg/cm2,ER页为1.4×104kg/cm2,初步分析该计算结果的可靠性,认为综合考虑施工方法及时间因素,利用反算法所得的弹性模量进行工程设计是可行的。Abstract: This paper gives the monitoring results of displacement and the monitoring method of constructing deformation on a tunnel surrounding rock,which is located in Changyang County,Hubei Province.There are some positive role to direct the construction and design.It is feasible for anchoring and grouting as a permanent retain of integrated limestone section of the tunnel.It is also available for anchoring and grouting as a temporary(not a permanent) retain of shale when construction on it.The finite element method is used to back calculate the average elastic modulus of the rock mass by the results of monitoring displacement:ERL=5.2×104 kg/cm2,E RS=1.4×104 kg/cm2.The reliance of this results is also analyzed in this paper.It is feasible for back calculation of the elastic modulus to design in practice.
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Keywords:
- surrounding rock /
- deformation /
- measuring /
- finite elements methods
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