顺层岩质边坡锚杆支护机制研究

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摘要全长黏结型锚杆作为一种有效且经济的加固手段，在边坡工程中得到广泛的应用，但其锚固机制尤其是考虑岩体结构特征的锚固理论需要进一步的研究和完善。基于顺层边坡的地质结构特征，考虑边坡岩体与锚杆的相互作用，运用弹性力学和结构力学对全长黏结型锚杆加固顺层边坡的机制进行研究，提出新的锚杆加固顺层边坡的力学模型。分析结果表明，顺层岩质边坡的锚固抗力由锚杆轴力与抗剪力共同提供，锚杆抗剪作用提供的抗滑力与锚杆轴力提供的抗滑力可以用线性关系来描述。运用有限元软件ABAQUS对这一力学模型进行建模，分析这一力学模型的正确性。

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关键词 ：边坡工程, 全长黏结型锚杆, 顺层边坡, 锚固机制, 力学模型, 数值模拟

Abstract：The reinforcement with fully grouted bolts is widely adopted in slope engineering due to its proven efficacy and low cost. However，the bolting mechanisms for bedding rock slopes are not clear and further investigations should be performed. The bolting behaviour of fully grouted bolts in bedding rock slopes is investigated considering the geological structural characteristics of bedding rock slopes and the interactions between the bolt and the rock mass utilizing the elastic theory and structural mechanics. A new mechanical model for fully grouted bolts is then put forward. The lateral shear and axial stresses acting in the intersection of the bolt and the discontinuity are found to be activated simultaneously and that the resistance of the bolt in bedding slope is provided jointly by the axial force and the shearing resistance. A linear relationship between the anti-slide forces provided by the axial force and the lateral shear force is described. Numerical simulations with the finite element method software ABAQUS to the bolting of a bedding rock slope confirm the correctness of the proposed mechanical model.

Key words： slope engineering fully grouted bolts bedding rock slopes reinforcement mechanisms mechanical models numerical simulations

收稿日期: 2013-11-08

引用本文:

王发玲，刘才华，龚哲. 顺层岩质边坡锚杆支护机制研究[J]. 岩石力学与工程学报, 2014, 33(7): 1465-1470.
WANG Faling，LIU Caihua，GONG Zhe. MECHANISMS OF BOLT SUPPORT FOR BEDDING ROCK SLOPES. , 2014, 33(7): 1465-1470.

链接本文:

http://www.rockmech.org/CN/Y2014/V33/I7/1465

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