Experimental investigation on the mechanical characteristics of columnar jointed rock mass samples based on 3D printing technology

ZHANG Tao; XU Wei-ya; MENG Qing-xiang; WANG Huan-ling; YAN Long; QIAN Kun

doi:10.16285/j.rsm.2021.0736

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Experimental investigation on the mechanical characteristics of columnar jointed rock mass samples based on 3D printing technology

更新时间：2026-06-25

- Experimental investigation on the mechanical characteristics of columnar jointed rock mass samples based on 3D printing technology
- Vol. 43, Issue S2, Pages: 245-254(2022)
- 作者机构：
  
  1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏,南京,210098
  2. 河海大学岩土工程科学研究所,江苏,南京,210098
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2021.0736
  CLC： TU45
- Online First：03 October 2022，
  
  Published：2022
- 稿件说明：
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ZHANG Tao, XU Wei-ya, MENG Qing-xiang, et al. Experimental investigation on the mechanical characteristics of columnar jointed rock mass samples based on 3D printing technology[J]. 2022, 43(S2): 245-254.
DOI：

ZHANG Tao, XU Wei-ya, MENG Qing-xiang, et al. Experimental investigation on the mechanical characteristics of columnar jointed rock mass samples based on 3D printing technology[J]. 2022, 43(S2): 245-254. DOI： 10.16285/j.rsm.2021.0736.

摘要

为了研究柱状节理岩体各向异性力学特征，基于白鹤滩水电站坝基柱状节理岩体的几何形态，引入一种可溶于水的聚乙烯醇（polyvinyl alcohol，简称PVA）材料，通过3D打印技术建立具有不同倾角的柱状节理网络结构，采用水泥砂浆作为类岩石材料制备柱状节理岩体试样。通过开展室内单轴压缩试验，分析了柱状节理岩体试样在单轴压缩应力下的各向异性力学特征。结果表明：柱状节理岩体的各向异性特征依赖于节理的倾角。柱状节理岩体的峰值强度和模量随着节理倾角的增加均呈现出近似U型曲线；试样主要产生垂直于柱体轴向的张拉裂隙、沿节理面的剪切裂隙和平行于柱体轴向的拉伸裂隙。通过力学各向异性评估发现峰值强度和残余强度各向异性程度为0.68和0.52，弹性模量和变形模量的各向异性程度为0.61和0.63。研究成果为柱状节理岩体的各向异性力学特性研究提供参考。

Abstract

Based on the geometrical morphology of the columnar jointed rock mass at the dam foundation of Baihetan Hydropower Station

a water-soluble polyvinyl alcohol (PVA) material was introduced

and the columnar jointed rock mass network structure with different inclination angles was established. The columnar jointed rock mass samples were prepared by cement mortar as rock-like materials using 3D printing technology to study the anisotropic mechanical characteristics of the columnar jointed rock mass. The anisotropic mechanical characteristics of columnar jointed rock mass were analyzed by uniaxial compression test in a laboratory. The results show that the anisotropy of columnar jointed rock mass depends on the dip angle of the joint. Peak strength and modulus of columnar jointed rock mass show an approximate “U” shaped curve with the increase of joint dip angle. In the uniaxial compression test

the cleavage cracks perpendicular to the axial direction of the cylinder

the shear cracks along the longitudinal joint plane

and the tensile cracks parallel to the axial direction of the cylinder are mainly produced. According to the evaluation of mechanical anisotropy

it is found that the anisotropy degree of peak strength and residual strength are 0.68 and 0.52

and the anisotropy degree of elastic modulus and deformation modulus are 0.61 and 0.63. The research results provide a reference for the study of the anisotropic mechanical properties of columnar jointed rock mass.

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