Experimental study on strength and failure characteristics of sandstone rock mass with complex cataclastic structure using 3D printing models.
Experimental study on strength and failure characteristics of sandstone rock mass with complex cataclastic structure using 3D printing models.
复制标题
基于3D打印模型的复杂碎裂结构砂岩岩体强度与破坏特性试验研究。
DOI：
10.1038/s41598-023-31957-2
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发表时间：
2023-03-25
影响因子：
4.6
通讯作者：
Hu, Xi
中科院分区：
文献类型：
--
作者：
Dong, Shan;Lu, Zhichun;Hu, Xi
碎裂岩体是一种较差的工程地质岩体类型。碎裂岩体剪切破坏特征及抗剪强度的确定可为基础设施的设计和施工提供重要依据。采用三维打印技术和人工浇筑相结合的方法，首次制作了砂岩碎裂岩体的物理模型样品。分别对平行于碎裂岩体模型轨迹线平面和垂直于模型轨迹线平面的剪应力进行了剪切试验。在广泛分析剪切破坏特征、剪切应力演化特征曲线和抗剪强度的基础上。当剪应力平行于示踪线平面，且被示踪线切割和约束的岩块呈现显著的尖端时，碎裂岩体在剪切过程中端应力集中效应更为显著，且岩块各向异性增大。此外，受节理约束和切割的岩块形状是影响碎裂岩体强度的主要因素。当剪应力垂直于轨迹线平面时，围岩结构是影响剪切破坏面变形破坏过程和抗剪强度的主要因素。研究发现，碎裂岩体剪切破坏面的物理力学特性与碎裂岩体的节理岩壁系统特征密切相关。因此，在确定碎裂岩体抗剪强度时，应综合考虑剪切过程中岩块的形状和组合形式、剪切方向以及岩壁的结构破坏特征。
A cataclastic rock mass is a poor type of engineering geological rock mass. The determination of the shear failure characteristics and shear strengths of cataclastic rock masses can provide key basis for the design and construction of infrastructure. Physical model samples of a sandstone cataclastic rock mass were first produced by a combination of three-dimensional (3D) printing technology and manual pouring. Shear tests were conducted with respect to the shear stresses parallel to the trace line plane and perpendicular to the trace line plane of the cataclastic rock mass model. Based on an extensive analysis of the shear failure characteristic, shear stress evolution characteristic curve and shear strength. When the shear stress was parallel to the trace line plane, and when the rock block that was cut and confined by the trace line exhibited a significant tip, the end stress concentration effect of the cataclastic rock mass was more significant during the shear process with the anisotropy of the rock block increased. In addition, the shapes of the rock blocks that were confined and cut by the joints were the main influencing factors of the strength of the cataclastic rock mass. When the shear stress was perpendicular to the trace line plane, the structure of the rock wall was the main influencing factor of the deformation and failure process of the shear failure plane and the shear strength. The physical and mechanical properties of the shear failure plane of the cataclastic rock mass were found to be closely related to the joint–rock wall system characteristics of the cataclastic rock mass. Therefore, when determining the shear strength of cataclastic rock mass, the shape and combination form of the rock block, shear direction, and structural failure characteristics of the rock wall should be comprehensively considered during the shear process.
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影响因子：
1.8
作者：
Zhang, Liguo;Wang, Dong;Zhang, Jianpeng
通讯作者：
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影响因子：
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作者：
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影响因子：
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10.1016/j.ijrmms.2018.06.004
发表时间：
2018-08-01
影响因子：
7.2
作者：
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通讯作者：
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作者：
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