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Geotechnical Engineering

Home/Geotechnical Engineering/Page 5

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Asked: July 15, 2020In: Geotechnical Engineering

Which type of soil is present in desert?

vivek gami
vivek gami

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Which type of soil is present in desert?

  1. nikeetasharma

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    nikeetasharma Guru
    Added an answer on December 18, 2020 at 8:32 pm

    Most of the desert soils are called Aridisols.

    Most of the desert soils are called Aridisols.

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Asked: July 27, 2020In: Geotechnical Engineering

What is the bearing capacity of soil? How can we calculate it?

Dhanya
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What is the bearing capacity of soil? How can we calculate it?

  1. CB Sowmya

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    Added an answer on July 29, 2020 at 6:13 pm

    With the previous answer, I would like to add the following. Bearing capacity plays a major role in the foundation design of a structure. Bearing capacity (kN/sq.m) is the maximum load that the soil can take per unit area without failure, displacement, or yielding. Bearing capacity depends on the soRead more

    With the previous answer, I would like to add the following.

    Bearing capacity plays a major role in the foundation design of a structure. Bearing capacity (kN/sq.m) is the maximum load that the soil can take per unit area without failure, displacement, or yielding. Bearing capacity depends on the soils structure, density, permeability, porosity, and shear strength. Mostly, based on the bearing capacity, we arrive at the type and dimensions on the footing,

    The tests have already been included in the answer by Vivek Patel.

    To know more about, bearing capacity of soils,

    https://test.theconstructor.org/geotechnical/bearing-capacity-of-soil-calculation/11996/

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Asked: July 31, 2020In: Geotechnical Engineering

What are the properties and significance of Fire Clay?

Vivek Patel
Vivek Patel

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What are the properties and significance of Fire Clay?

  1. nikeetasharma

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    Added an answer on October 8, 2020 at 7:31 pm

    Fire clay :- Fire clay is a range of refractory clays used in the manufacture of ceramics, especially fire brick. The United States Environmental Protection Agency defines fire clay very generally as a "mineral aggregate composed of hydrous silicates of aluminium (Al2O3·2SiO2·2H2O) with or without fRead more

    Fire clay :-

    Fire clay is a range of refractory clays used in the manufacture of ceramics, especially fire brick. The United States Environmental Protection Agency defines fire clay very generally as a “mineral aggregate composed of hydrous silicates of aluminium (Al2O3·2SiO2·2H2O) with or without free silica.”

    Properties of fire clay :-

    Fire clay is resistant to high temperatures, having fusion points higher than 1,600 °C (2,910 °F); therefore it is suitable for lining furnaces, as fire brick, and for manufacture of utensils used in the metalworking industries, such as crucibles, saggars, retorts and glassware. Because of its stability during firing in the kiln, it can be used to make complex items of pottery such as pipes and sanitary ware.

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Asked: May 17, 2020In: Geotechnical Engineering

How Many Samples of Cores Required for Compaction Test of Backfill?

Fasi Ur Rahman
Fasi Ur Rahman

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An auditorium of size 42m x 25m is under construction, whose plinth is completed and backfilling is in process. The client has requested for compaction test of the backfill. The compaction test is carried out by the core cutting method. How ...

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Asked: February 1, 2020In: Geotechnical Engineering

Footing subjected to Biaxial Bending and uplift.

Biradar
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Dear Memebers, Has any one a Excel format to Design a Footing Subjected to Biaxial bending combined with uplift and pressure, in SI units. Regards Biradar

  1. Omprakash Dhawale

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    Added an answer on October 2, 2020 at 5:56 pm
    This answer was edited.

    Sir, Footing is the lowermost part of foundation. Footings are subjected to axial load and bending that can have a portion of their footing area that does not act in bearing. Generally, a direct method of proportioning a rectangular footing area subjected to biaxial bending is proposed as an alternaRead more

    Sir,

    Footing is the lowermost part of foundation.

    Footings are subjected to axial load and bending that can have a portion of their footing area that does not act in bearing.

    Generally, a direct method of proportioning a rectangular footing area subjected to biaxial bending is proposed as an alternative to the trial and error method of the given solution.  

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Asked: May 22, 2020In: Geotechnical Engineering

What is the size of the gravel which is used in pavements for Granular base?

MohamedAquib
MohamedAquib

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What is the size of the gravel which is used in pavements for Granular base and Which type of soil is mostly used?

  1. HMNZ 1010

    HMNZ 1010

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    Added an answer on June 12, 2020 at 1:01 pm

    This question actually needs very long & detailed answer,It can not be answered in 2 lines.However,Let me summarize this as possible. The flexible pavement contains 4 main pavement layers that are as following Sub-grade(Natural soil) ,  Sub-base , base & Surface Course. The surface course coRead more

    This question actually needs very long & detailed answer,It can not be answered in 2 lines.However,Let me summarize this as possible.

    • The flexible pavement contains 4 main pavement layers that are as following Sub-grade(Natural soil) ,  Sub-base , base & Surface Course.
    • The surface course contains 4 layers as well that are as following Prime Coat , Binder Course , Tack Coat & Wearing Surface.
    • The Binder Course & Wearing Course contains the Following (Coarse aggregate + Fine aggregate + mineral filler + Asphalt)
    • Size & Gradation of aggregate(Coarse & fine) shall be as following as per AASHTO …> Coarse aggregate (Retained on Sieves#4 , 8 & 10) …> and the fine aggregate (Passing from Sieves#4 , 8 & 10) …> Mineral filler (at least 70% pass from sieve#200)
    • Regarding the Subgrade soil shall be Fine or Coarse aggregate and the soil shall have group index less than 4 to be suitable for use as per AASHTO
    • Group index equation as following (G.I=0.2*a + 0.005*a*c + 0.01*b*d)
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Asked: July 20, 2020In: Geotechnical Engineering

What is the meaning of shear strength in soil?

fathima
fathima

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What is the meaning of shear strength in soil?

  1. nikeetasharma

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    Added an answer on October 2, 2020 at 8:39 pm

    Generally, shear strength is a term used in soil mechanics to describe the magnitude of the shear stress that a soil can sustain. The shear resistant of soil is a result of friction and interlocking of particles, and possibly cementation or bonding at particle contacts. Due to interlocking, particulRead more

    Generally, shear strength is a term used in soil mechanics to describe the magnitude of the shear stress that a soil can sustain. The shear resistant of soil is a result of friction and interlocking of particles, and possibly cementation or bonding at particle contacts. Due to interlocking, particulate material may expand or contract in volume as it is subject to shear strength. If soil expands its volume, the density of particles will decrease and the strength will decrease; in this case the peak strength would be followed by a reduction of shear stress.

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Asked: July 2, 2020In: Geotechnical Engineering

What is the purpose of applying a Geo Textile layer in ground improvement techniques?

Mangala Karunarathne
Mangala Karunarathne

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What is the purpose of applying a Geo Textile layer in ground improvement techniques?

  1. Kuldeep Singh

    Kuldeep Singh

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    Added an answer on July 3, 2020 at 10:51 pm

    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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