An Analysis on Engineering Properties of Peaty Soil in Kunming Civil Engineering

2012 ◽  
Vol 568 ◽  
pp. 21-26
Author(s):  
Zai Xi Yu ◽  
Jing Cao ◽  
Hui Min Zhao
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Stress Path ◽  
Engineering Properties ◽  
Burial Depth ◽  
Factors Affecting ◽  
Engineering Construction ◽  
The Poor ◽  
Peaty Soil ◽  
Biological Field

The poor engineering properties of peaty soil are unfavourable for engineering construction. Based on field test datum, the mechanical properties of peaty soil in different buried depth have been analyzed. The result shows that the shear strength of shallowly buried peaty soil reduce gradually with the increase of burial depth, however, which increase gradually along with the depth for deep buried peaty soil. The factors affecting the meso-structure of soil, for example, stress state, the stress history, the stress path, the variation of groundwater, chemical field, biological field and physical field is discussed.

scholarly journals Three-dimensional numerical simulation of mechanical properties of soil-tire mixture by discrete element method

2019 ◽  
Vol 92 ◽  
pp. 14011
Author(s):  
Mohsen Asadi ◽  
Ahmad Mahboubi
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Damping Ratio ◽  
Strain Curve ◽  
Young Modulus ◽  
Engineering Properties ◽  
Triaxial Tests ◽  
Sand Particle ◽  
Arithmetic Average ◽  
Harmonic Average

Soil engineering properties can be improved employing different methods. Among them is mixing soil with tire derived additives (TDA). TDAs generally increase some parameters of mixture such as damping ratio, permeability, ductility and also in some cases shear strength. Various properties of TDAs from mechanical properties to their geometry can affect the mixture behavior. In this paper using the YADE platform, simulations of triaxial tests on sand tire mixtures are presented. To take compressibility into consideration, each rubber crumb particle is made of several spheres connected elastically to each other. For sand particle generation the clump technique was employed. Shapes of both sand and rubber particles are inspired from real grains. As properties of sand and rubber are different, especially Young modulus, rubber sand interaction is considered as soft rigid contact. Therefor harmonic average and arithmetic average was used to compute contact Young modulus (and then stiffness). The model was validated by comparison of results of triaxial tests simulation on pure rubber sample with literature ones which both exhibited linear stress-strain curve. Then triaxial tests with different sand to rubber ratio were simulated to see whether harmonic average or arithmetic average gives the best match to literature. The results show shear strength reduces by decreasing of sand to rubber ratio. This is the same as what is reported in literature.

Experiment Research of Luming Molybdenum Mine Rock Physical and Mechanical Properties

2014 ◽  
Vol 881-883 ◽  
pp. 1726-1731
Author(s):  
Ying Hua Zhang ◽  
Bo Chuan Zhao ◽  
Zhou Jing Ye ◽  
Zhi An Huang ◽  
Ming Shan Gong
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Slope Stability ◽  
Physical Simulation ◽  
Physical And Mechanical Properties ◽  
General Rule ◽  
Uniaxial Tensile ◽  
Factors Affecting ◽  
Uniaxial Tensile Strength ◽  
Weak Structure

Physical and mechanical properties of rocks are the fundamental factors affecting the slope stability, the rock physical and mechanical properties of the Luming molybdenum mine were tested and analyzed in the laboratory. The results can provide us the basic data and reference to do numerical simulation and physical simulation of slope stability. The experimental results showed that: the greater the depth of rock of Luming molybdenum mine, the greater the density becomes,so as the freeze-thaw coefficient; the rock strength complies with the general rule; uniaxial tensile strength of dried rocks is much larger than water-saturated rocks; various rocks compressive strength σ3 rose up with σ1 rising; the shear strength of the rocks containing weak structure surface is far less than the shear strength of the intact rocks.

Study on Classification of Rock Pile

2011 ◽  
Vol 52-54 ◽  
pp. 777-781
Author(s):  
Ming Kui Huang
Keyword(s):  
Mechanical Properties ◽  
Classification Method ◽  
Engineering Properties ◽  
Engineering Construction ◽  
Rock Pile ◽  
Factors Influencing ◽  
Main Factors

Rock pile is a typical kind of adverse engineering geologic phenomenon in mountainous engineering construction. In this paper, according to the main factors influencing the engineering properties of rock pile, the classification of the rock pile are studied. Based on the physico- mechanical properties of rock pile, the multi-hierarchy classification method is proposed. The suitability of the process is verified by classifying the typical rock pile on the Shui-ma(from Shuifu to Maliu Bay) expressway. The relevant results can provide reference to other classification study of rock pile.

Experimental Study on Mechanical Properties of Rock Pile

2010 ◽  
Vol 168-170 ◽  
pp. 303-306
Author(s):  
Ming Kui Huang ◽  
Xi Wu Yang
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Yunnan Province ◽  
Influencing Factor ◽  
Engineering Properties ◽  
Coarse Particles ◽  
Particle Composition ◽  
Engineering Construction ◽  
Rock Pile ◽  
Main Factor

Rock pile is a typical kind of adverse engineering geologic phenomenon in mountainous engineering construction. In this paper, the Shui-ma(from Shuifu to Maliu Bay) expressway subgrade of rock pile in Yunnan Province is analyzed, and the mechanical properties of the rock pile are studied through indoor experiments. The results indicate that the main factor determining the engineering properties of rock pile is the particle composition, while the most influencing factor is the content of coarse particles. The relevant results can provide reference to engineering properties study of rock pile for other place.

High-Resolution, Low-Voltage SEM of Cell Wall Regeneration of Yeast Shizosaccharomyces Pombe Protoplasts

1988 ◽  
Vol 46 ◽  
pp. 208-211
Author(s):  
M. Osumi ◽  
N. Yamada ◽  
T. Nagatani
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Low Voltage ◽  
Cell Wall Regeneration ◽  
The Past ◽  
The Poor ◽  
Probe Size ◽  
Beam Damage ◽  
Biological Field ◽  
Scanning Electron

Even though many early workers had suggested the use of lower voltages to increase topographic contrast and to reduce specimen charging and beam damage, we did not usually operate in the conventional scanning electron microscope at low voltage because of the poor resolution, especially of bioligical specimens. However, the development of the “in-lens” field emission scanning electron microscope (FESEM) has led to marked inprovement in resolution, especially in the range of 1-5 kV, within the past year. The probe size has been cumulated to be 0.7nm in diameter at 30kV and about 3nm at 1kV. We have been trying to develop techniques to use this in-lens FESEM at low voltage (LVSEM) for direct observation of totally uncoated biological specimens and have developed the LVSEM method for the biological field.

The Paradox of Poverty: Socio-Economic Aspects of Population Growth.— By T. Scarlett Epstein and Darrell Jackson. The Macmillan of India Limited Delhi, 1975. pp.127.

1978 ◽  
Vol 17 (3) ◽  
pp. 380-382
Author(s):  
M. Javed Akbar Zaki
Keyword(s):  
Decision Making ◽  
Social Situation ◽  
Economic Security ◽  
Rural India ◽  
Factors Affecting ◽  
Number Of Children ◽  
Economic Progress ◽  
The Poor ◽  
Fertility Decision ◽  
The Social

To many social theoreticians, the population explosion, particularly in the developing nations presents a crippling threat to their developmental pro¬cesses. Their argument's validity rests mainly on the assumption that expected economic progress is swallowed up by unbalanced rise of numbers in the population. The book being reviewed deals mainly with this subject matter and is divided into two parts, each containing three articles contributed by various researchers. Part one, 'The Social context of Fertility Decision' is focused on analyzing the role of factors affecting fertility at the micro-level decision making process. The first article 'Fertility decision in rural India' by Vinod Jainath, examines the applicability to rural India of various models of the process of fertility decision making and finds most of these wanting with respect to the Indian social situation. While analyzing the fertility patterns of Rural India, he points out the positive need for larger families among the poor small farmers mainly due to labour supply considerations. The author argues that unemployment and under¬employment actually motivate the poor to have more children as it better ensures their economic security in their old age. As the chances of gaining employ¬ment for their offspring diminish, they are induced to increase the total number of children in order that atleast one will be able to support them. Thus a vicious circle of poverty arises in large families because of each of the parents wanting to increase their children's chances of employment by ultimately reducing the overall employment opportunities even further and exacerbating their poverty.

ALUMINUM 220

Alloy Digest ◽  
1962 ◽  
Vol 11 (3) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Heat Treating ◽  
Casting Alloy ◽  
Aluminum Casting ◽  
Aluminum Casting Alloy ◽  
Temperature Performance ◽  
Aluminum Company

Abstract ALUMINUM 220 is a 10% magnesium-aluminum casting alloy having the highest combination of mechanical properties, corrosion resistance and machinability. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-112. Producer or source: Aluminum Company of America.

ALUMINUM 2011

Alloy Digest ◽  
1978 ◽  
Vol 27 (12) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Temperature Performance ◽  
Screw Machine ◽  
Aluminum Copper Alloy

Abstract ALUMINUM 2011 is an age-hardenable aluminum-copper alloy to which lead and bismuth are added to make it a free-machining alloy. It has good mechanical properties and was designed primarily for the manufacture of screw-machine products. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-32. Producer or source: Various aluminum companies. Originally published October 1955, revised December 1978.

ALCAN 350

Alloy Digest ◽  
1957 ◽  
Vol 6 (7) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Heat Treating ◽  
Casting Alloy ◽  
Aluminum Casting ◽  
Aluminum Casting Alloy ◽  
Good Corrosion Resistance ◽  
Aluminum Company

Abstract ALCAN 350 is a 10% magnesium-aluminum casting alloy having high mechanical properties, excellent machinability, and good corrosion resistance. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and shear strength as well as fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-52. Producer or source: Aluminum Company of Canada Ltd.

Sign in / Sign up

Export Citation Format

Share Document