土钉瞬态应力的试验研究*

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Abstract The key elements and condition of the field test on performance of soil nails against dynamic load in the loess carven are discribed，and test results of the testing soil nails at top of the cavern arch are given. The one-dimension viscoelastic Maxwell model is used in data fitting. The relations between the transient stresses in the testing soil nails and the burying depths of the unsupported cavern and the cavern with soil nails and structure measure under the action of blast-induced stress wave are compared. The relations between the relative stresses and the relative distance to explosion center of these caverns are also compared. The tests indicate that the cavern with soil nails and structure measure has better performance of dynamic viscoelasticity.

Key words： soil mechanics support of soil nail explosion load cavern viscoelastic model

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https://rockmech.whrsm.ac.cn/EN/Y2004/V23/IS1/4438