File Name: solved problems in soil mechanics and foundation engineering .zip
Prieto-Portar, October, Table of Contents Table of Contents
Save extra with 2 Offers. Verma Book Summary: A number of good books are available on Theoretical Soil Mechanics but the author felt that the students are in need of a book which can help them in solving practical problems in Soil Mechanics. While on one hand students find difficulty in solving the problems, on the other, they do not get a sufficient number of problems for their practice for University Examinations.
Prieto-Portar, October, ii. Find the required number of borings and their depth The sample s disturbance due to the boring diameter Three methods used for SPT depth corrections The Shear Vane Test determines the in-situ cohesion C R STP correction factor for the rod length. C S STP correction factor for the sampler type used. D f Depth of the foundation s invert. E m The efficiency of the STP hammer.
N The raw value of the STP as obtained in the field. S The number of stories of a building. Find the required number of borings and their depth. Revised: Sept. The building will have a 0 m x 40 m footprint and is expected to be supported on spread footing foundations located about 1 m below the ground surface. The site appears to be in its natural condition, with no evidence of previous grading.
Bedrock is 0-m below the ground surface. Determine the required number and depth of the borings. Solution: A reinforced concrete building is heavier than a steel framed building of the same size.
Hence, the design engineer will want soil conditions that are at least average or better. From Table-1 below, one boring will be needed for every 00 m of footprint area. Most design engineers want one boring to go to a slightly greater depth to check the next lower stratum s strength.
In summary, the exploration plan will be 4 borings to a depth of 14 m. Table-1 - Spacing of the exploratory borings for buildings on shallow foundations. The sample s disturbance due to the boring diameter.
Split spoon tubes split longitudinally into halves and permit taking a soil or soft rock sample. The tube size is designated as an NX. This small size has the advantage of cheapness, because it is relatively easy to drive into the ground. However, it has the disadvantage of disturbing the natural texture of the soil. In soft rocks, such as young limestone, it will destroy the rock to such a degree that it may be classified as a sand. A better sampler is the Shelby or thin-tube sampler.
It has the same outside diameter of inches although the trend it to use inches. Compare the degree of sample disturbance of a US standard split-spoon sampler, versus the two Shelby thin-tube samplers and outside diameters via their area ratio A r a measure of sample disturbance.
Solution: The area ratio for a "-standard split-spoon sampler is, o i Di o i Di. Correcting the SPT for depth and sampling method. Revision Sept A standard penetration test SPT has been conducted in a loose coarse sand stratum to a depth of 16 ft below the ground surface.
The tests were conducted using a US-style donut hammer in a 6 inch diameter boring with a standard sampler and liner. The effective unit weight of the loose sand stratum is about 9. That corrected SPT N 60 is then corrected for depth.
Three methods used for SPT depth corrections. Revision Sept. Correct it only for depth. Solution: Any of these three methods will provide acceptable answers. Notice how similar their results are from each other: 1. SPT corrections under a mat foundation. The Shear Vane Test determines the in-situ cohesion.
In a field test, the vane required a torque of Determine the un-drained cohesion c u corrected for its plasticity. Reading a soil boring log. Solution: 1 The phreatic surface the water table was not encountered in this boring and is noted at the bottom of the report; The boring was terminated at 1 feet in depth; and Five samples were taken.
Only one sample was used for laboratory tests dry density and moisture content. Samples 1 and were complete split-spoon samples. Samples 4 and 5 were incomplete split-spoon samples.
Notice that the Legend portion denotes that the sampler was a O. Therefore, the sampling correction is, 0. The log identifies this level at as a brown and grey fine to medium SAND.
Use the Table provided on page to obtain an estimate of some of the engineering parameters for granular soils. Find the shear strength of a soil from the CPT Report. Revision: Sept. Compare your estimate of the shear strength versus the lab test value of kpa. From the next chart, the soil appears to be a silty clay. G S Specific gravity of the solids of a soil.
S Degree of saturation. V a Volume of air. V S Volume of solids. V W Volume of water. W S Weight of solids. W W Weight of water. A Volumetric Relationships: 1. Typical values of sands are: very dense 0.
The porosity provides a measure of the permeability of a soil. B Weight Relationships: 4. Revision: Oct. It was found to weigh grams. Notice that the grams is a mass. The specifications require that e Has the contractor complied with the specifications? Determine which are not correctly reported, if any. Determine the voids ratio e and the specific gravity G s of this soil. Determine the voids ratio e and the specific gravity G s of the soil. NB: This is the same problem as Phase 06, but solved with a block diagram.
The engineer suspects that one of the measurements is in error. Are the engineer s suspicions correct? If so, which one of these values is wrong, and what should be its correct value? Which one of the three suppliers is the most economical, and how much will you save? Therefore: To put 1yd of solids in the dam you would need 1.
For 1yd of solids from A you would need 1. For 1yd of solids from B you would need. For 1yd of solids from C you would need. Assume each truck carries 10 yd of soil. Since the original ground is low, you will use the limestone excavated from the lake to fill the land in order to build roads and housing pads.
What volume would you need from company B? Which would be the cheaper supplier? Solution: 1 The key idea: 1 yd of solids from the borrow pit supplies 1 yd of solids in the fill.
This image cannot currently be displayed. It is a field edtest to estimate e the penetration e resistance. Soil is the most misunderstood term in the field. The problem arises in the reasons for which different groups or professions study soils. Soil scientists are interested in soils as a medium for plant.
General Information Several testing methods can be used to measure soil engineering properties. The advantages,.
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These books are used by students of top universities, institutes and colleges. Geotechnical engineering is the branch of civil engineering concerned with the engineering behavior of earth materials. Geotechnical engineering is important in civil engineering, but also has applications in military, mining, petroleum and other engineering disciplines that are concerned with construction occurring on the surface or within the ground. Soil mechanics includes the study of soil composition, strength, consolidation, and the use of hydraulic principles to deal with issues concerning sediments and other deposits. Soil mechanics is one of the major sciences for resolving problems related to geology and geophysical engineering. In engineering, a foundation is the element of a structure which connects it to the ground, and transfers loads from the structure to the ground.
These books are used by students of top universities, institutes and colleges. Geotechnical engineering is the branch of civil engineering concerned with the engineering behavior of earth materials. Geotechnical engineering is important in civil engineering, but also has applications in military, mining, petroleum and other engineering disciplines that are concerned with construction occurring on the surface or within the ground. Soil mechanics includes the study of soil composition, strength, consolidation, and the use of hydraulic principles to deal with issues concerning sediments and other deposits. Soil mechanics is one of the major sciences for resolving problems related to geology and geophysical engineering.
Prieto-Portar, October, ii. Find the required number of borings and their depth The sample s disturbance due to the boring diameter
Solved Problems. Soil / Rock Mechanics and. Foundations Engineering. These notes are provided to you by Professor Prieto-Portar, and in exchange.Fortijanpa 26.05.2021 at 15:56
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