基于模型试验与变形加固理论的高拱坝整体稳定性判据研究

doi:10.13722/j.cnki.jrme.2014.11.007

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摘要高拱坝结构作为超静定的岩体工程结构，在破坏过程中，首先发生局部起裂，然后整体进入非线性变形阶段，最后发生整体破坏，因此难以用单一的稳定性判据衡量高拱坝的整体稳定性。使用超水荷载法研究拱坝的稳定性，分析拱坝整体结构在超载过程中的破坏过程。对基于地质力学模型试验的三安全度(K1，K2，K3)评价标准和基于非线性数值模拟的超载倍数–塑性余能曲线评判标准进行对比分析。同时，利用变形加固理论能够近似模拟结构发生局部破坏后应力、位移情况的优势，提出基于变形加固理论的拱坝三安全度评判标准K–1，K–2，K–3。通过对模型试验和数值计算的结果归纳分析，分别论述模型试验的K1，K2，K3与数值计算的K–1，K–2，K–3之间的联系。结果表明，基于地质力学模型试验的三安全度评价标准K1，K2，K3与所提出的基于变形加固理论的三安全度评价标准K–1，K–2，K–3具有较高的一致性，两者之间可以互相验证。

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关键词 ：水利工程, 高拱坝, 模型试验, 变形加固理论, 稳定性判据

Abstract：During the entire failure process，high arch dam as a statically indeterminate rock structure breaks locally at first；then the whole system enters the nonlinear deformation stage；and finally the overall structure failure happens. Consequently，it is difficult to evaluate the global stability of a high arch dam using a single criterion. In this paper，the entire failure process was analysed adopting the overload method to study the stability of high arch dams. Meanwhile，3 safety factors(K1，K2，K3) based on the geological model test and the norm criterion of the curve of plastic complementary energy were discussed and compared. 3 safety factors(K–1，K–2，K–3) to simulate the failure process were proposed in this paper by using the theory of deformation reinforcement. The relationships between K1，K2，K3 and K–1，K–2，K–3 were discussed through analysing the results of model tests and the numerical computations completed in recent years. Results indicate that high consistency exists between two criteria and two criteria can validate each other.

Key words： hydraulic engineering high arch dam model test deformation reinforcement theory stability criterion

收稿日期: 2014-06-26

引用本文:

程立，刘耀儒，潘元炜，杨强，周维垣. 基于模型试验与变形加固理论的高拱坝整体稳定性判据研究[J]. 岩石力学与工程学报, 2014, 33(11): 2225-2235.
CHENG Li，LIU Yaoru，PAN Yuanwei，YANG Qiang，ZHOU Weiyuan. CRITERION OF GLOBAL STABILITY OF HIGH ARCH DAM STRUCTURES BASED ON MODEL TEST AND EDFORMATION REINFORCEMENT THEORY. , 2014, 33(11): 2225-2235.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.11.007 或 http://www.rockmech.org/CN/Y2014/V33/I11/2225

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