基于3D打印技术的裂隙岩体单轴压缩特性试验初探

doi:10.13722/j.cnki.jrme.2017.1039

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摘要岩体内结构面空间几何分布复杂，无法大量制作裂隙岩体试样一直是困扰岩体力学试验深入研究的难题之一。介绍一种采用3D打印技术制备不同几何形态裂隙网络模型的方法，并针对不同样本尺寸的粗糙型裂隙岩体RDFN模型、直线型DFN模型和实心模式分别开展单轴压缩室内试验，结果表明：采用3D打印技术可以实现复杂裂隙网络模型的制备，能够为室内试验复杂裂隙样本的重复制作和试验对比分析提供有效的途径，相似裂隙岩体模型可以有效地分析内部裂隙网络对岩体结构力学特性的影响规律，研究发现，含有预置裂隙的岩体单轴压缩条件下的弹性模量、单轴抗压强度显著低于实心岩石模型，随着岩体模型尺寸的增加，单轴压缩力学特性呈现显著的变化，且RDFN模型开裂模式与DFN模型存在显著差异；考虑裂隙粗糙性的RDFN模型的弹性模量、单轴抗压强度较高于直线型DFN模型，若不考虑节理粗糙性将低估裂隙岩体的抗压力学特性。

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	王培涛1
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	刘雨3
	章亮3
	黄正均1
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	蔡美峰1
	3

关键词 ：岩石力学, 裂隙岩体, 3D打印, 粗糙裂隙网络, 单轴压缩, 室内试验

Abstract：Fail to prepare the fractured rock samples with complex structures has long been hampering the mechanical experiment on the structural surfaces of rock mass. The fractured rock specimens with rough joints were manufactured using the 3D printing technique. Then uniaxial compressive tests were conducted on the rough discrete fractures network(RDFN) models，discrete fractures network(DFN) models and intact rocks with varied scale sizes. The results show that 3D printing technology can provide the opportunity to produce both the DFN models and RDFN models. A serials of rock specimens with the same internal structures and scale sizes could be efficiently established. According to the uniaxial compressive results，the elastic modulus and uniaxial compressive strength(UCS) of the printed fractured rock specimens were apparently lower than those of the intact rock specimens. The uniaxial compressive behaviors of RDFN and DFN models varied with the increasing of scale sizes. Different fractured patterns were also found after compressive failure. When considering the joint roughness，the elastic modulus and UCS of RDFN models were higher than those of the DFN models. The uniaxial compressive behavior of fractured rock mass would be underestimated if the joint roughness is ignored.

Key words： rock mechanics fractured rock mass 3D printing rough fracture network uniaxial compression experimental test

引用本文:

王培涛1，2，3，刘雨3，章亮3，黄正均1，3，蔡美峰1，3. 基于3D打印技术的裂隙岩体单轴压缩特性试验初探[J]. 岩石力学与工程学报, 2018, 37(2): 364-373.
WANG Peitao1，2，3，LIU Yu3，ZHANG Liang3，HUANG Zhengjun1，3，CAI Meifeng1，3. Preliminary experimental study on uniaxial compressive properties of 3D printed fractured rock models. , 2018, 37(2): 364-373.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2017.1039 或 http://www.rockmech.org/CN/Y2018/V37/I2/364

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