What is the purpose of applying a Geo Textile layer in ground improvement techniques?
Floating foundation can be used in on high moisture soils.
Floating foundation can be used in on high moisture soils.
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In which type of soil ‘Floating foundation’ can be used?
What is different between Prandtal mixing length and Boundarylayer ?
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Prandtl mixing line theory is the phenomenon of momentum remaining constant in fluid flow where the boundary layer is a theory of variations of velocity perpendicular to the floor and velocity value change from 0 to infinite. Prandtl mixing theory is used for the study of momentum in fluid flow. BouRead more
Prandtl mixing line theory is the phenomenon of momentum remaining constant in fluid flow where the boundary layer is a theory of variations of velocity perpendicular to the floor and velocity value change from 0 to infinite.
Prandtl mixing theory is used for the study of momentum in fluid flow.
Boundary layer theory is used for the study of velocity distributions in fluid flow.
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Which best material for backfill of retaining wall?
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Thus when it comes to backfill, it refers to the dirt behind the wall. In order to provide proper drainage, atleast 12 inches of granular backfill (gravel or a similar aggregate) should be installed directly behind the wall. Compacted native soil can be used to backfill the rest of the space behindRead more
Thus when it comes to backfill, it refers to the dirt behind the wall. In order to provide proper drainage, atleast 12 inches of granular backfill (gravel or a similar aggregate) should be installed directly behind the wall. Compacted native soil can be used to backfill the rest of the space behind the wall.
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Hi, With regards to your article (link: https://test.theconstructor.org/geotechnical/soil-maximum-dry-density-optimum-moisture-content/18426/), what is the reference in standards. I done check with BS 1377:1990 Part 4 ; but there is no statement saying the range of optimum moisture content for different soil type. If your author ...
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The optimum moisture content of soil actually varies and a standard value for silt, clay, and sand is not strictly mentioned in most of the codes. The values mentioned in the article were based on the general laboratory test values based on Indian Standard Tests and Indian soil conditions. If my knoRead more
The optimum moisture content of soil actually varies and a standard value for silt, clay, and sand is not strictly mentioned in most of the codes. The values mentioned in the article were based on the general laboratory test values based on Indian Standard Tests and Indian soil conditions.
If my knowledge is right, we do mention the average moisture content value within a range.
Thanks for your feedback and query
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What is the difference between black cotton soil and clay?
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Black Cotton soil ; Black Cotton Soil is a heavy clayey soil, varying from clay to loam.The black color in black cotton soil is due to the presence of Titanium Oxide in a little concentration. Generally, it is light to dark appearance. Found in central and southern parts of India. Clay SOIL; Clay soRead more
Black Cotton soil ; Black Cotton Soil is a heavy clayey soil, varying from clay to loam.The black color in black cotton soil is due to the presence of Titanium Oxide in a little concentration. Generally, it is light to dark appearance. Found in central and southern parts of India.
Clay SOIL; Clay soil is composed of very small fine particles and not much organic in nature. It contains clay minerals which, when get wet, develops plasticity. Clay minerals have hydrous Aluminium phyllosilicates.
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Himanshu joshi
Learner
What are the method for finding Bearing capacity of soil?
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The different methods for finding bearing capacity of soil are as follows :- 1. Presumptive analysis 2. Analytical method 3. Plate bearing test 4. Penetration test 5. Modern testing method 6. Centrifuge test
The different methods for finding bearing capacity of soil are as follows :-
1. Presumptive analysis
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2. Analytical method
3. Plate bearing test
4. Penetration test
5. Modern testing method
6. Centrifuge test
What is a triaxial test? Why it is significant to know soil property? and which type of property?
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Triaxial test ; The triaxial test is one of the most versatile and widely performed tests in the geotechnical laboratory. It allows shear strength and stiffness of soil and rock to be determined for use in geotechnical design. - Procedure of triaxial test :- The triaxial test typically involves subjRead more
Triaxial test ;
The triaxial test is one of the most versatile and widely performed tests in the geotechnical laboratory. It allows shear strength and stiffness of soil and rock to be determined for use in geotechnical design.
– Procedure of triaxial test :-
The triaxial test typically involves subjecting a cylindrical specimen of soil, whose diameter ranges from 38mm to 100mm, into a cell that can be pressurized. Most of the specimens have an approximate 2:1 height to dia ratio and are sealed with a rubber membrane. The specimen preparation generally depends upon the type of soil. Cohesive soil samples are prepared directly from saturated compacted samples, either undisturbed or remolded. The specimen for cohesion-less soil is prepared with the help of the mold that maintains the required shape of the specimen.
And then the specimen is vertically covered with a thin rubber membrane and placed between two rigid ends inside a pressure chamber. The upper plate can move vertically and apply vertical stresses to the specimen. The axial stress/strain of the sample is controlled by the movement of this vertical axis. The water pressure surrounding the sample in the pressure chamber controls the confining pressure. Also, the volume change of the sample is controlled by measuring the exact volume of moving water.
There are three primary triaxial test carried out in a laboratory, depending upon the combination of loading and drainage condition ;
- Consolidated – Drained (CD)
- Consolidated – Undrained (CU)
- Unconsolidated – Undrained (UU)
Triaxial test is significant to know soil property because it determines the ability of soil to resist shear stress and strain. Different combination of confining and axial stresses can be applied. Drained and undrained test can be carried out. The types of properties of soil which can be known by triaxial test are followed ;
- Shear strength and stiffness of soil
- Stress/Strain behavior
- Pore water pressure of soil
Kuldeep Singh
Geotextile layers are a very comprehensive means of soil stabilization through reinforcement. The primary purpose is to provide tensile reinforcement just like steel does for concrete, so as to create a confining pressure in the soil to prevent slippage, caving, or any kind of soil deformation. OtheRead more
Geotextile layers are a very comprehensive means of soil stabilization through reinforcement.
The primary purpose is to provide tensile reinforcement just like steel does for concrete, so as to create a confining pressure in the soil to prevent slippage, caving, or any kind of soil deformation. Other than that, geotextiles can help achieve higher grades of compaction, easier and steeper slope stabilization, and check erosion.
The mechanism is fairly similar to that of steel reinforcement in concrete. The geotextile layers are fairly good in resisting tension, and there is a great deal of friction between the soil and the geotextile. When soil is loaded vertically, it tends to bulge horizontally, but there exists a counteracting shear stress creating a reverse confining pressure in the soil and preventing deformations.
Other than the above, geotextile layers have also been used to replace inclined retaining walls partially, subgrade stabilization and base reinforcement in roads, maintaining railway trackbed levels and geometry, preventing rainfall erosion isolation of base and subgrade of sports pitches and even reinforcement of retaining walls.
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