scholarly journals Experimental study on similar materials in model test based on orthogonal design

2021 ◽  
Vol 692 (4) ◽  
pp. 042014
Author(s):  
Jianguang Li ◽  
Huisong Zou ◽  
Gengyu Sun ◽  
Ziyi Zhou ◽  
Lingqi Zeng
Keyword(s):  
Experimental Study ◽  
Model Test ◽  
Orthogonal Design ◽  
Similar Materials

scholarly journals Experimental Study on the Ratio of Similar Materials in Weak Surrounding Rock Based on Orthogonal Design

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Pengfei Jiao ◽  
Xiao Zhang ◽  
Xinzhi Li ◽  
Bohong Liu ◽  
Haojie Zhang
Keyword(s):  
Model Test ◽  
Orthogonal Design ◽  
Surrounding Rock ◽  
Similar Material ◽  
Geomechanical Model ◽  
Geomechanical Model Test ◽  
Geological Conditions ◽  
Key Factor ◽  
Similar Materials ◽  
Weak Surrounding Rock

In the aspect of stability analysis of tunneling engineering, geomechanical model test is an important research method. A similar material is the prerequisite for the success of geomechanical model test. In the field of major engineering applications, a variety of similar materials are prepared for different geological conditions of surrounding rock and applied in some major engineering. With the use of standard sand, fine sand, and silt clay as materials, similar materials for weak surrounding rock were developed. Based on the orthogonal design method, through the direct shear test, the range analysis and variance analysis of various factors affecting the physical and mechanical parameters of weak surrounding rock are carried out. The results show similar material can meet the requirements in weak surrounding rock. Standard sand is the key factor that influences the internal friction angle of similar materials, and silt clay is the key factor affecting the cohesion of similar materials. Similar materials can meet the elastic modulus and severe requirements of the weak surrounding rock and can be used for the weak surrounding rock engineering. The new type of similar material configuration is widely used in shallow buried tunnel entrance section and urban shallow buried excavation engineering, in addition to tunnel engineering in loess stratum, and the problems of engineering design and construction are solved through geomechanical model test.

Research on Similar Material of Physical Model for Bai Jiabao Landslide

2012 ◽  
Vol 594-597 ◽  
pp. 37-41 ◽  
Author(s):  
Yun Hua Yang ◽  
Sheng Guo Cheng
Keyword(s):  
Model Test ◽  
Orthogonal Design ◽  
Uniform Design ◽  
Silty Sand ◽  
Similar Material ◽  
Crystalline Powder ◽  
River Sand ◽  
Similar Criterion ◽  
Similar Materials ◽  
Landslide Model

Based on the Bai Jiabao landslide model test, the landslide’s similar materials are studied.According to the similar criterion theory , the methods of uniform design and orthogonal design are used to determine the ratio of materials. The results is showed that the similar materials of the heavy grain of sand, the heavy crystalline powder, the river sand, the flour, silty sand have the similar physical properties with the Bai Jiabao Landslide and that they are used as materials to simulate the landslide in the model test are suitable.

The Study on the Ratio of Similar Material in Landslide Model Test

2011 ◽  
Vol 261-263 ◽  
pp. 1679-1684
Author(s):  
Xiao Ling Liu ◽  
Shi Mei Wang ◽  
Yun Zhi Tan ◽  
Xin Jiang Hu ◽  
Dai Peng Zhao
Keyword(s):  
Model Test ◽  
Influence Factors ◽  
Deformation Modulus ◽  
High Strength ◽  
Similar Material ◽  
Talcum Powder ◽  
Angle Of Internal Friction ◽  
Similar Materials ◽  
Mixed Material ◽  
Landslide Model

The choice of similar materials and the design of mix proportions is a key step in landslide model test. On the basis of experiment, we conduct a research for the similar materials which may sufficing volume weight, cohesive force, angle of internal friction, deformation modulus, and the infiltration coefficient on the same time. Then we put forward two kinds of schemes: one is the mixed material of high-strength glass micro beads and talcum powder; the other is the mixed material of lead beads, river sands, rubber powder and talcum powder. By analyzing the result of mix proportions test, We concluded the regularity that similar index varies along with different content of the similar material ingredients and found the notable influence factors , which provides important reference for the components of similar materials in the landslide model test.

scholarly journals Experimental study of hydrodynamic forces acting on ship bow during wave capture

2019 ◽  
pp. 146-152
Author(s):  
Pavel Burakovskiy
Keyword(s):  
Experimental Study ◽  
Test Data ◽  
Model Test ◽  
Hydrodynamic Forces ◽  
Hydrodynamic Loads ◽  
Test Tank ◽  
Head Waves ◽  
Negative Effect

This paper studies behavior of ship in head waves, when her bow dips under water, which leads to hydrodynamic forces and moments to be assessed. This paper presents model test data obtained in the test tank on the model of ship bow (hydrodynamic loads on forecastle deck during wave capture) as well as updates the coefficient of flow around the bow. The study also shows that bulwark has negative effect upon safety in these conditions because it significantly increases hydrodynamic loads on the deck.

Experimental Study on the Influence of Appendages on a Yacht Rolling at Zero Froude Number

2004 ◽  
Vol 41 (04) ◽  
pp. 200-206
Author(s):  
Kim Klaka ◽  
Martin Renilson
Keyword(s):  
Experimental Study ◽  
Froude Number ◽  
Model Test ◽  
Roll Motion ◽  
Forward Speed ◽  
Test Results

Yachts tend to roll uncomfortably while at anchor, causing discomfort to the crew and passengers, generating additional stresses on equipment, and making such operations as embarking and disembarking hazardous activities. Currently, there is a dearth of data regarding roll motions at zero forward speed for hull shapes dominated by large appendages. Hence, an experimental study into the effect of large appendages on roll motion was undertaken. The model test results are presented, showing how changes in appendage geometry alter the roll response.

scholarly journals Experimental Research and Sensitivity Analysis of Mudstone Similar Materials Based on Orthogonal Design

2020 ◽  
Vol 2020 ◽  
pp. 1-14 ◽  
Author(s):  
Caoxuan Wen ◽  
Shanpo Jia ◽  
Xiaofei Fu ◽  
Lingdong Meng ◽  
Zhenyun Zhao
Keyword(s):  
Sensitivity Analysis ◽  
Compressive Strength ◽  
Experimental Research ◽  
Orthogonal Design ◽  
Triaxial Compression ◽  
Mass Ratio ◽  
Similar Material ◽  
River Sand ◽  
Binder Ratio ◽  
Similar Materials

Due to the strong hydration sensitivity of mudstone, drilling of deep mudstone is difficult and pricy, which results in the study on its physical and mechanical properties inseparable from similar material tests. On these bases, triaxial compression and Brazilian tensile tests of the original mudstone drilled from the caprock of the D5 aquifer structure are carried out. Then, orthogonal experiments of mudstone similar materials with river sand and barite powder as aggregate and cement and gypsum as the binder are conducted, which include 3 factors that, respectively, are mass ratio of aggregate to binder, mass ratio of cement to gypsum, and barite powder content, and each factor contains 5 levels, totalling 25 groups of 150 samples. By comparing the results of mudstone and artificial samples made of similar materials, it is obvious that artificial samples and mudstone are significantly similar in terms of density, compressive strength, elastic modulus, and compressive strength when the aggregate-binder ratio is about 4, 8, 5, and 4, respectively. Further sensitivity analysis showed that the aggregate-binder ratio played a major role in controlling the properties of artificial samples, while the sensitivity of different parameters to the cement-gypsum ratio and barite content was different. The results indicate that the selected raw materials and their proportion are feasible, which can meet similar requirements and can be a reference for similar material experimental research of target mudstone.

Development of New-Type Similar Materials of Geomechanics Models Test for Geotechnical Engineering

2006 ◽  
Vol 326-328 ◽  
pp. 1781-1784
Author(s):  
Qiang Yong Zhang ◽  
Wei Shen Zhu ◽  
Yong Li ◽  
X.H. Guo
Keyword(s):  
Model Test ◽  
Quartz Sand ◽  
Iron Ore ◽  
Geotechnical Engineering ◽  
High Volume ◽  
Alcohol Solution ◽  
Volume Weight ◽  
Deformation Properties ◽  
Similar Materials ◽  
New Type

Geomechanics model test can simulate the real excavation process of geotechnical engineering and the mechanics deformation properties of the rockmass prototype on the condition of meeting the similar principles. In order to conducting geomechanics model test, similar material which can meet similar mechanical properties must be used. It is only after conducting a massive mechanics experiments that a new-type similar materials called iron crystal sand is developed in this paper. This material consists of iron ore powder, blanc fix, quartz sand, gypsum powder and rosin alcohol solution which are evenly mixed in certain proportion and pressed together. The iron ore powder, blanc fix and quartz sand among them are main materials. The rosin alcohol solution is the cementing agent and gypsum powder the regulator. The material mechanics experiments show that this material has following outstanding characteristics: high volume-weight, wide variable mechanical parameters, stable performance, low price, quick drying, simple processing and innocuity. It can simulate most rockmass material from soft to hard ones and can be widely used in geomechanics model tests in fields of energy sources, transportation, water conservancy and mining.

Experimental Study on Inner Reinforced Concrete-Block Composite Shaft Lining

2010 ◽  
Vol 163-167 ◽  
pp. 1316-1320
Author(s):  
Hao Liang Jiang ◽  
Ri Hui Liu
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Test Data ◽  
Model Test ◽  
Deformation Characteristic ◽  
Concrete Block ◽  
Vertical Shaft ◽  
Composite Shaft ◽  
Shaft Sinking ◽  
Shaft Lining

Inner reinforced concrete-block composite shaft lining was widely used in vertical shaft sinking by vertical shaft sinking machine (VSM) and freezing shaft. In this paper, the deformation characteristic, failure Patten and the load Bering capacity of inner reinforced concrete-block composite shaft lining are presented ,based on the model test .and the test data are provide for the design and calculation of this kinds of composite shaft lining.

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