Feasibility Investigation of 3D Printing Technology for Geotechnical Physical Models: Study of Tunnels

Song, Leibo; Jiang, Quan; Shi, Ying-En; Feng, Xia‐Ting; Li, Yuanhui; Su, Fangsheng; Liu, Chang

doi:10.1007/s00603-018-1504-3

Cited by 78 publications

(17 citation statements)

References 34 publications

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“…To solve this problem, the brittle failure can be increased by freezing it at low temperatures and adding macro-or microcracks within the specimen [67]. In addition to the sandstonebased materials and photosensitive resin, gypsum has been used in several studies to reconstruct rock specimens using 3DP [73][74][75][76]. The 3D printed specimens reconstructed by gypsum generally have low strength, which is suitable for simulating soft rock structures.…”

Section: Preparation Of Specimens In Laboratory Testsmentioning

confidence: 99%

“…The test results can provide an intuitive interpretation of mechanical properties, deformation trends, and stability characteristics of rock masses. Therefore, the experimental tests have become an important method for studying the stability of rock structures and verifying numerical simulations [74,[94][95][96]. In deep underground projects, there are widely adjacent tunnels and caverns, such as the twin railroad tunnels for urban and mountain highways [97][98][99][100], large caverns in hydroelectric power plants [101,102], and the deep mine tunnels [103,104].…”

Section: Repetitive Preparation Of Rock Mass With Complexmentioning

confidence: 99%

“…The reconstruction method of 3DP may overcome the disadvantages of traditional geotechnical modelling methods. Song et al [74] prepared four tunnel models via 3DP with gypsum powder and PLA (polylactic acid) materials. The uniaxial compression test results showed that the failure characteristics of the conventional tunnel and single fault tunnel models are similar to the failure process of the 3D printed model (Figure 6).…”

Section: Repetitive Preparation Of Rock Mass With Complexmentioning

confidence: 99%

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Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

et al. 2021

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In the engineering of underground construction, the discontinuous structures in rock mass have important influences on the mechanical behaviors of the subsurface of rock mass. The acquisition of mechanical parameters is the basis of rock mass engineering design, construction, safety, and stability evaluation. However, the mechanical parameters and failure characteristics of the same rock mass under different mechanical conditions cannot be obtained due to the limitations of specimen preparation techniques. In recent years, with the continuous development of 3D printing (3DP) technology, it has been successfully applied to the repetitive preparation of rock mass samples. The combinations of 3DP and other techniques, such as 3D scanning and CT scanning, provided a new approach to study the mechanical behavior of complex structural rock masses. In this study, through a comprehensive review of the technical progress, equipment situation, application fields, and challenges of the use of 3DP technology, the following conclusions were obtained: (1) 3DP technology has advantages over traditional rock mass specimen preparation techniques, and the verification of test results using 3D printed samples shows that the 3DP has broad application prospects in geotechnical engineering. (2) The combination of 3DP and other advanced techniques can be used to achieve the accurate reconstruction of complex structural rock masses and to obtain the mechanical and failure characteristics of the same rock mass structure under different mechanical boundary conditions. (3) The development of 3DP materials with high strength, high brittleness, and low ductility has become the major bottleneck in the application of 3DP in geotechnical engineering. (4) 3D printers need to meet the high precision and large size requirements while also having high strength and long-term printing ability. The development of 3D printers that can print different types of materials is also an important aspect of the application of 3DP in geotechnical engineering.

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Section: Preparation Of Specimens In Laboratory Testsmentioning

confidence: 99%

Section: Repetitive Preparation Of Rock Mass With Complexmentioning

confidence: 99%

Section: Repetitive Preparation Of Rock Mass With Complexmentioning

confidence: 99%

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Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

et al. 2021

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“…For milk off-take, a methodological study conducted in Niger comparing different types of recall to an objective measure provides some confidence in the accuracy of recall measures (Zezza et al, 2016a). Other technologies, such as 3D and thermal cameras, are being used to assess livestock weight and health (Song et al, 2018;Stajnko et al, 2008), but mostly by animal scientists rather than economists or statisticians. Nonetheless, there is a clear potential for economic applications to emerge, as the value of livestock is primarily determined by parameters linked to weight and health, which are notoriously difficult to elicit from survey respondents.…”

Section: Livestock Production and Managementmentioning

confidence: 99%

Agricultural Data Collection to Minimize Measurement Error and Maximize Coverage

Carletto¹,

Dillon²,

Zezza³

2021

Policy Research Working Papers

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The Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished. The papers carry the names of the authors and should be cited accordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent. Policy Research Working Paper 9745Advances in agricultural data production provide ever-increasing opportunities for pushing the research frontier in agricultural economics and designing better agricultural policy. As new technologies present opportunities to create new and integrated data sources, researchers face trade-offs in survey design that may reduce measurement error or increase coverage. This paper first reviews the econometric and survey methodology literatures that focus on the sources of measurement error and coverage bias in agricultural data collection. Second, it provides examples of how agricultural data structure affects testable empirical models. Finally, it reviews the challenges and opportunities offered by technological innovation to meet old and new data demands and address key empirical questions, focusing on the scalable data innovations of greatest potential impact for empirical methods and research. This paper is a product of the Development Data Group, Development Economics. It is part of a larger effort by the World Bank to provide open access to its research and make a contribution to development policy discussions around the world.

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“…But with the development of industrial manufacturing, the combination of 3D scanning and 3Dprinting technology is likely to be the great solution to this issue for its application on the replication of internal defects and fabrication on geological material [27,28]. Furthermore, in the geotechnical field, by combination with the digital speckle correlation method (DSCM), the crack propagation evolution and the failure mode of tested specimens can be further explored [29]. Otherwise, glass, resin, barite, gypsum, and cement were commonly used in the previous fabrication of rock-like specimens [30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Fracture Evolution Processof Rock‐like Specimens Containing a Closed RoughJoint Based on 3D‐Printing Technology

Liu

Jing

et al. 2020

Advances in Civil Engineering

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In order to overcome the disadvantage of traditional joint fabrication method—inability to reproduce the rough surfaces of practical rock joints—3D-printing technology was applied to restructure five kinds of rough joint according to the failure surface formed by the triaxial prepeak unloading test in this study. And uniaxial compression test was carried out on the rock-like specimens containing closed 3D-printing rough joint to study the effects of joint inclination and joint length on the mechanical properties (peak strength, peak strain, elastic modulus, and secant modulus), cracking process, and failure modes. Besides, digital image correlation (DIC) method and acoustic emission (AE) system are used to investigate the whole evolution process of strain fields and crack propagation during loading. It is found that the mechanical parameters decrease first and then go up as the joint inclination increases, while presenting a continuous downward trend with the increase of joint length. Inclination of 45° and the larger joint length bring more extensive reduction to mechanical properties of specimens. Specimens exhibit typical brittle failure characteristics. The failure mode of specimens affected by different joint inclination is tension-shear failure. And the joint scale rises; the failure mode of specimens changes from tensile failure to shear failure. Larger joint scale results in the longer prepeak fluctuation phase on axial stress-strain curves and more dispersed distribution of high-value AE counts.

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Feasibility Investigation of 3D Printing Technology for Geotechnical Physical Models: Study of Tunnels

Cited by 78 publications

References 34 publications

Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

Application of 3D Printing Technology in the Mechanical Testing of Complex Structural Rock Masses

Agricultural Data Collection to Minimize Measurement Error and Maximize Coverage

Experimental Study on the Fracture Evolution Processof Rock‐like Specimens Containing a Closed RoughJoint Based on 3D‐Printing Technology

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