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| NUMERICAL MODELING ANALYSIS OF THE CONSTRUCTION METHOD WITH SEVERAL LAYERS EXCAVATING AND STRESS DISCHARGING IN ADVANCE FOR LARGE UNDERGROUND CAVITY |
| BI Ji-hong, DU Yu-dong |
| College of Civil Engineering and Architecture, Tianjin University |
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Abstract Research purpose: In view of the problem of construction time limited and the construction passage limited of underground factory house for Hainan construction project, we bring up a new construction technology-several layers excavating and stress discharging in advance to solve this difficult problem.
Research method: There is less experience of this construction technology. In order to guarantee the construction smoothly to carry on, this paper calculated with ANSYS software simulated the excavating process of several layers excavating and stress discharging in advance for big cross-section of underground factory house, analyzed the nonlinear numerical model to ensure the surrounding rock mass in stable condition and to reinforce the weak area in time and gave the doable estimate to this construction method.
Research result: Through comparing and analyzing the monitoring information with numerical result, the paper approved this estimate was right and reasonable. At the same, comparing with traditional construction method of layer by layer excavating, it also approved the construction method of several layers excavating had its advantage.
Research conclusion: The paper proved theoretically that the construction method is doable. In many aspects, this new method is better than traditional method of layer by layer excavating and provides an effective construction method for the big underground cavities fast excavation.
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Received: 13 October 2005
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2006, Vol. 23 
