RESEARCH ON GEOMECHANICAL MODEL TEST OF DAGANGSHAN HIGH ARCH DAM BASED ON BLOCK MASONRY TECHNIQUE

ZHANG Long; LIU Yao-ru; YANG Qiang; YANG Ruo-qiong

doi:10.6052/j.issn.1000-4750.2013.03-0196

Volume 31 Issue 8

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Engineering Mechanics > 2014 > 31(8): 53-62. > DOI: 10.6052/j.issn.1000-4750.2013.03-0196

ZHANG Long, LIU Yao-ru, YANG Qiang, YANG Ruo-qiong. RESEARCH ON GEOMECHANICAL MODEL TEST OF DAGANGSHAN HIGH ARCH DAM BASED ON BLOCK MASONRY TECHNIQUE[J]. Engineering Mechanics, 2014, 31(8): 53-62. DOI: 10.6052/j.issn.1000-4750.2013.03-0196

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RESEARCH ON GEOMECHANICAL MODEL TEST OF DAGANGSHAN HIGH ARCH DAM BASED ON BLOCK MASONRY TECHNIQUE

State Key Laboratory of Hydroscience and Hydraulc Engineering, Tsinghua University, Beijing 100084, China

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Received Date: March 11, 2013
Revised Date: September 10, 2013

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Abstract

A geomechanical model test is an important method to study the global stability and the safety of a foundation and its superstructure since the test can truly simulate a complicated geologic structure and intuitively reflect its failure process. Not only the deformation and strength of jointed rock, but also the discontinuous structural surface, a dam structure and foundation reinforcement measures can be modeled by block masonry technique. This technique is applied to the geomechanical model test of Dagangshan arch dam with foundation reinforcement measures and an overload failure test is conducted by loading, measuring and monitoring systems. The stress and displacement distribution of the dam body are obtained. The failure mechanism and process of the abutment and dam body are explored. The global stalibily of Dagangshan arch dam is evaluated by three characteriastic overload factors, namely K₁(the safety factor when crack initiation), K₂ (the safety factor for large nonlinear deformation) and K₃ (the safety factor for ultimate load). The comparative analysis with other high arch dam tests indicates that the global stability of Dagangshan is comparatively high. The comparision with the geomechanical model test of Dagangshan without foundation reinforcement measures shows that the reinforcement is effective.
- geomechanical model test,
- block masory technique,
- arch dam,
- global stability,
- reinforcement

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