Category Archives: Pile foundation ppt

Pile foundation ppt

Category : Pile foundation ppt

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Method As Q. Tags: deep design foundations foundation pile. Latest Highest Rated. The Fundamental Basis? How is Stress Measured? Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for fun, PowerShow. And, best of all, most of its cool features are free and easy to use. You can use PowerShow. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free.

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Pile foundations are deep foundations used when the site has a weak shallow bearing strata making it necessary to transfer load to a deeper strata either by friction or end bearing principles. Foundations provide support for structures by transferring the load to the rock or layers of soil that have sufficient bearing capacity and suitable settlement characteristics.

There are a very wide range of foundations types available which are suitable for different applications. Foundations are classified mainly as Shallow foundations and Deep foundations. Shallow foundations are used where the load imposed by a structure are low relative to bearing capacity of surface soils. Deep foundations are necessary where the bearing capacity of the surface soils is insufficient to support loads imposed on it and hence they are transferred to deeper layers with high bearing capacity.

Pile foundations are deep foundations which are formed by long slender columnar elements. They consist of two components: Pile cap and single or group of piles.

Pile foundations are principally used to transfer the loads from super structure, through weak compressible strata or water on to stronger, more compact, less compressible and stiffer soil or rock. This type of foundation is used for large structures and also in situations where the soil is not suitable to prevent excessive settlement. The pile foundations are classified based on load carrying characteristic of piles, material of pile construction and type of soil.

These transmit most of their loads to the load bearing layer which can be dense sand or rock. Most of the pile capacity is inferred from the end bearing point.

pile foundation ppt

End-bearing pile. These transmit their load through the layers through which the piles pass which is mostly through the surface friction skin friction with the surrounding soils. Here the piles are driven to such a depth that the frictional resistance which is developed at the side of the piles equals to the load coming on the piles. Friction pile. Timber can be used for manufacture of temporary piles and also for permanent ones in regions where timber is readily and economically available.

Steel can be used for both temporary and permanent works. They are suitable for handling and driving for piles with prolonged lengths. Their relatively small cross sectional area along with the high strength makes penetration easier in firm soil.

Pile Foundation Seminar PPT with PDF Report

Installation of steel piles. Concrete is used to manufacture of precast concrete piles, cast in place and pre-stressed concrete piles. Pre-stressed concrete piles are becoming more approved than the ordinary pre-cast as less reinforcement is required. For example, part of timber pile which is installed above ground water could be endangered to insect attack and decay.

So to avoid this, concrete or steel pile is used above ground water level whilst timber is installed under the ground water level.Preface Pile foundations is a very vast subject and it is not possible to cover all the information regarding pile foundations in one book or presentation.

The objective of this presentation is to give an overall view of the subject which will serve as beginners guide. The focus of the presentation is mainly on onshore pile foundations. The author has tried to explain the subject through simple concepts and visuals without giving detailed methodologies or mathematical concepts to maintain the interest of the beginner ,without loading his mind with unnecessary confusion.

However, some formulae were presented at some places only to appreciate the statements made. The author assumes that the reader has basic knowledge of soil mechanics and foundation engineering and basic principles of engineering. The author will be pleased to accept comments and suggestions, without deviating from the basic objective of the presentation, for further improvement. Varanasi Rama Rao. Contents 1. Pile installation Installation of Driven piles Installation of Bored piles Advantages and Disadvantages of various piles.

Special Topics Negative skin friction Socketed piles Dynamic pile testing Pile integrity testing Dynamic loading on piles.

Overview Pile foundations are adopted generally in the following situations: Low Bearing Capacity of soil. Non availability of proper bearing stratum at shallow depths. Heavy loads from the super structure for which shallow foundation may not be economical or feasible. Based on Size Micro piles dia.

How does a pile look like? Before presenting the actual picture of a pile foundation some schematic pictures of pile foundation are presented below.

pile foundation ppt

All the loads from super structure viz. Dead loads, Live loads Wind loads and Seismic loads. The loads from the surrounding soil in case of seismic event. Water loads in the case of off- shore structures. Piles usually exist as groups which are all integrated by means of a pile cap as shown in the below schematic. What are the load carrying mechanisms of piles? End bearing cum friction piles carry vertical compressive loads partly by means of resistance offered by the hard stratum at the tip of the pile and partly by the friction developed between the pile shaft and soil Pure friction piles carry the major part of loads only by means of friction developed between pile shaft and soil; and pure End bearing piles only by means of bearing resistance at the tip of the pile In both the above cases lateral loads are carried by the lateral resistance offered by the surrounding soil.

What is meant by load carrying capacity of the pile foundation? Load carrying capacity of the pile in the context of foundation engineering: The amount of load the pile can carry without undergoing continuous displacements for insignificant load increments by virtue of its boundary condition soil condition and not by virtue of its structural strength.

Pile Capacities What are the various capacities of pile commonly used in practice? Axial capacity Lateral capacity Pullout capacity or Tension capacity. How to estimate the capacity of a Pile?Toggle navigation.

Help Preferences Sign up Log in. View by Category Toggle navigation. Products Sold on our sister site CrystalGraphics. Description: foundations Tags: foundations foundations pile settlements. Latest Highest Rated. A backyard tool shed may need only wooden skids to spread its load across an area of ground surface, whereas a house would need greater stability and consequently its foundation should reach the underlying soil that is free of organic matter and unreachable by the winters frost.

A larger and heavier building of masonry, steel, or concrete would require its foundations to go deeper into earth such that the soil or the rock on which it is founded is competent to carry its massive loads on some sites, this means going a hundred feet or more below the surface.

Because of the variety of soil, rock, and water conditions that are encountered below the surface of the ground and the unique demands that many buildings make upon the foundations, foundation design is a highly specialized field of geotechnical engineering.

BUT, will prevent ground moisture from migrating through a wall. Typically used in conjunction will drainage pipe.

56 - Piling work construction- Cast in situ Pile Foundation- Rig Machine- Civil Engineer- Success555

Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for fun, PowerShow. And, best of all, most of its cool features are free and easy to use. You can use PowerShow. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world.

That's all free as well! For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides.Foundations provide support to the structure, transfers the loads from the structure to the soil.

But the layer at which the foundation transfers the load shall have an adequate bearing capacity and suitable settlement characteristics. There are several types of foundation depending on various considerations such as. Broadly speaking, foundations can be classified as shallow foundations and deep foundations. Shallow footings are usually used when the bearing capacity of the surface soil is adequate to carry the loads imposed by a structure. On the other hand, deep foundations are usually used when the bearing capacity of the surface soil is not sufficient to carry the loads imposed by a structure.

So, the loads have to be transferred to a deeper level where the soil layer has a higher bearing capacity. Pile foundationa kind of deep foundation, is actually a slender column or long cylinder made of materials such as concrete or steel which are used to support the structure and transfer the load at desired depth either by end bearing or skin friction.

Pile foundations are deep foundations. They are formed by long, slender, columnar elements typically made from steel or reinforced concrete, or sometimes timber.

A foundation is described as 'piled' when its depth is more than three times its breadth.

DESIGN OF DEEP FOUNDATIONS - PowerPoint PPT Presentation

Pile foundations are usually used for large structures and in situations where the soil at shallow depth is not suitable to resist excessive settlement, resist uplift, etc. Pile foundations can be classified based on function, materials and installation process, etc. Followings are the types of pile foundation used in construction:.

pile foundation ppt

This type of pile is mostly used to provide lateral support. Usually, they resist lateral pressure from loose soil, the flow of water, etc. They are usually used for cofferdams, trench sheeting, shore protection, etc. They are not used for providing vertical support to the structure. They are usually used to serve the following purpose. This type of pile foundation is mainly used to transfer the vertical loads from the structure to the soil.

These foundations transmit loads through the soil with poor supporting property onto a layer which is capable of bearing the load. Depending on the mechanism of load transfer from pile to the soil, load-bearing piles can be further classified as flowed. In this type of pile, the loads pass through the lower tip of the pile.

The bottom end of the pile rests on a strong layer of soil or rock. Usually, the pile rests at a transition layer of a weak and strong slayer. As a result, the pile acts as a column and safely transfers the load to the strong layer. The total capacity of end bearing pile can be calculated by multiplying the area of the tip of the pile and the bearing capacity of at that particular depth of soil at which the pile rests. Considering a reasonable factor of safety, the diameter of the pile is calculated.Pile foundations consist of piles that are dug into soil till a layer of stable soil is reached.

Pile foundations transfer building load to the bearing ground with the greater bearing capacity. Pile foundations are useful in regions with unstable upper soil that may erode, or for large structures. Pile foundations are often required to resist lateral loading. Lateral loads come from a varietyof sources including wind, earthquakes, waves, and ship impacts. The lateral capacity of a pile isusually much smaller than the axial capacity and as a result groups of piles are often installed toincrease the lateral capacity of the entire foundation system.

When vertical or plumb pile groups donot provide sufficient lateral resistance the piles can be battered in order to mobilize some of thehigher axial capacity to resist the lateral load. Piles are relatively long, slender members that transmit foundation loads through soil strata of low bearing capacity to deeper soil or rock strata having a high bearing capacity.

They are used when for economic, constructional or soil condition considerations it is desirable to transmit loads to strata beyond the practical reach of shallow foundations. In addition to supporting structures, piles are also used to anchor structures against uplift forces and to assist structures in resisting lateral and overturning forces.

Pile foundation have been used for many years, for carrying and transferring the loads to soil considered to be weak in structure due to the soil conditions. In the early stages of development, villages and towns were located in the close vicinity of lakes and rivers due to the availability of waterand, also, to ensure proper protection of the area.

Therefore, the weak bearing ground was reinforced by the use of timber piles that were manually forced into the ground, or fixed into the holes that were filled with stones and sand. The primitive methods of pile installation were modified after the industrial revolution, and the techniques of installation by steam or diesel driven machines were introduced. With the advancement in the technologies of soil mechanics and other related disciplines, superior piles and pile installation system have been developed.

It would cause non-uniform settlement if a shallow foundation is constructed. A pile foundation is required to reduce differential settlement. Piles are used to transfer the load beyond the zone of possible moisture changes in such soils. Even in case of precast piles, the concrete is subjected of heavy stresses during driving operation and consequent damages cannot be ruled out.

Quite often the skin friction developed is of much magnitude as to prevent further driving of a pile although a firm stratum has not been reached. New testing techniques for checking the integrity of piles and information about strata through piles have passed or resting have removed the uncertainty of load carrying capacity of piles to large extent.Share to Facebook Share to Twitter. The seminar report on the topic Pile foundation for civil engineering students discusses the process of pile foundation design, introductions and problems definition.

The seminar report contains literature review of the Pile Foundation Process. It includes the location of study area and project site. Seminar Report also includes brief details of equipment used on the site and its cost. Seminar report also contains the geotechnical investigation of soil and mix design. It also includes important activities such as marking the center line, boring, lowering of reinforcement, concreting, excavation, chipping of pile cap etc.

It also includes various tests done on site and their conclusion. Also, last this project report contains conclusion and recommendations and references. You can also find a student's guide for Pile Foundation Design. This guide has extracted the main points and puts together the whole process of pile foundation design in a student-friendly manner. It will be helpful to prepare seminar report for civil engineering and projects.

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pile foundation ppt

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Comments

Mautaxe

30.10.2020 at 10:12 pm

ich beglückwünsche, welche Wörter..., der glänzende Gedanke