Excavators

Excavators

excavators of "home" is known as a boom on a rotating platform, stick, bucket and cab are heavy construction equipment consisting .The house undercarriage with tracks or wheels sits above. Movements.They steam shovels to dig a cable operated and are often referred to fulfill a natural progression from power shovels and steel rope winches uses. All the movements and actions of a hydraulic excavator hydraulic cylinders and hydraulic motors, the hydraulic fluid is achieved through the use of. The linear actuation of the hydraulic cylinder, the operation mode of the cable is fundamentally different from walking excavators.

User

Excavators are used in several ways:

Trenches, holes, foundations, excavations
Material Handling
Brush cutting with hydraulic attachments
Forestry work
Of forestry mulching
Demolition
General grading / landscaping
Mining, especially, but not only open-pit mining
River dredging
In conjunction with a pile driver, pile driving
Rock blasting, drilling for foundation and anchor


Configurations

Modern, hydraulic excavators come in a wide variety of sizes. Small mini or compact excavators are called. For example, Caterpillar's smallest mini excavator 2,060 pounds (930 kg) weight and the 13 HP, the largest model available, the largest excavation CAT 6090, the 2,160,510 pounds (979, 990 kg) of weight (prior to a record held by Orenstein & Koppel RH400) is 4500 HP and is approximately 52,0 m³ bucket mounted on a bucket size.

Hydraulic excavators, hydraulic pump drives the engines usually, motor, track motors, and accessories, for two main pumps weapons (up to 5000 psi) high pressure oil supply Swing, and the third a low pressure (700 PSI) is pumped to the pilot: there are 3 common control pumps, spool valves are used to control the circuit, when the work needed to control allows for a little effort.

The two main parts of an excavator undercarriage and home. undercarriage is a hydraulic motor and gearing to drive individual tracks which (if installed) blade, tracks, track frame, and final drives, including the plant operator cab, counterweight, the engine, fuel and hydraulic oil including tanks. Home by way of a center pin to the undercarriage. Seamless high-pressure oil to 360 ° slew allowing machine, a hydraulic swivel axis of the pin through the tracks' is supplied to the hydraulic motors

The main boom attaches to the house, and could be one of several different configurations:

Most mono boom: they are straight up and down, no movement.
Some others left and right machine can move in line with the boom which is included.
Another option is home to 180 ° hydraulically independent, allowing it to pivot the boom is based; however, this only for compact excavators are usually available.
Obviously triple peak (TAB) also.
Stick (or dipper arm) is increasingly associated with the end. Rod through the bucket digging force required to pull the offers. Reach rod length (longer stick) or break-out force (short stick) is optional depending on whether it is needed.

At the end of the rod is usually a bucket. A wide with a straight cutting edge, large capacity (soil) or where the digger bucket cleaning and planting material is used to soften, and the teeth are not required. A general purpose (GP) bucket Generally, smaller, stronger and tougher soils and rocks, side cutters and teeth used to break through is tough. Buckets of various shapes and sizes for different applications. So boring to be associated with the excavator, which are available on many other attachments, ripping the, crushing, cutting, lifting, there are also

Before the 1990s, all the digging, digging and carries the potential to provide more power to the machine that hung off the back was for a long or traditional counterweight. When working in confined areas, it became a problem. Yanmar in 1993, when used in a confined space such as being safer and more user-friendly, the world's first zero tail swing excavator, [9] which, as it slews counterweight allows to remain within the width of the tracks start what. This type of machine is now widely used around the world.

That "control" the two main types of layouts XY joysticks usually spread between the four major excavations which controls both the boom and bucket, to control the use of excavators. A skilled operator to simultaneously control allows all functions. In other parts of the world, ISO's control layout is more common in the United States is the most popular SAE Controls setting. Takeuchi, such as some manufacturers to use operator controls that allow you to choose the configuration that switch.

excavator attachments

Hydraulic excavator buckets, digging with capabilities far beyond what is extended. Such a breaker, a grapple or an auger as the advent of hydraulic powered attachments, excavator digging often used in many other applications. Many excavators increase in the use of the machine at the jobsite, a quick coupler for easy attachment to the mounting feature. Excavators, loaders and bulldozers usually working together. Most, wheels compact and medium (11 to 18 tonnes) Excavators a backfill (or dozer) blade. It is attached to the undercarriage and a horizontal bulldozer blade-like material to be removed and a hole in the back is used for further

Earth work

Earth work cutting or filling

The amount of earthworks including rock, soil or unformed parts of the earth's surface is moving or engineering works are created through processing. Land and moved to another location for a purpose which can be formed into a desired shape. including earthworks excavation and filling of the machine or digging backfill.Types

Type of excavated material can be classified by:


excavation of topsoil
Soil
Rock excavation
Muck Excavation - it usually contains excess water and suitable soil
Unclassified Excavation - any combination of the types of materials
Excavation may be classified by purpose:

Stripping
Road excavation
Drainage excavation or structure
Excavation of the moment
Channel excavation
Foundation excavation
Borrow excavation
dredge drilling
Underground excavation
The use of civil engineering 
General earthworks, roads, railway beds, causeways, dams, levees, canals, and berms are included. Other general topography of the site to reconfigure earthworks land grading, or are to stabilize slopes.

Military Use
In military engineering, earthworks, more specifically, fortifications were built of clay types. The soil is not very strong, but strong structure to produce large quantity, it can be quite affordable. Examples of digging moats of older fortifications, sod walls, clod and Bailey castles, and include hill forts. Modern examples include ditches and berms.

Equipment 
To millions of cubic meters - the amount of material to be moved due to heavy construction equipment is typically used. Thus loader excavator construction, production trucks, grader, bulldozer, excavator, dragline excavation and as (Fresno) scraper and other earth-moving machines was revolutionized by the development.

Topographical Survey

Topogra[hical survey

The topography of the surface shape and the planets, moons and asteroids Earthand and other observable characteristics of astronomical objects and planetary science is a field of study Geoscience contain. The size and characteristics of such level (especially those reflected in the map) is described. The topography of the area and the characteristics of the surface shape could mean.

Usually, the natural and artificial features topography relief, and even local history and culture not only includes, usually concerned with local detail. Topographic maps with elevation contours meaning "topography" is made equivalent to aid the United States, is less common. As the study of the topography of the old feeling is still the currency in Europe.

Relief topography or terrain recording in a narrow sense, the level of three-dimensional quality, and require the identification of specific landforms. It is also known as geomorphometry. In modern use, this digital form (DEM) data generation requires the development. The most graphic contour lines, hypsometric tints techniques including avariety, landform represented by a map, and relief shading is considered to be

The term originated in the topography of ancient Greece and as a detailed description of the place, in ancient Rome. The word comes from the Greek words τόπος (topos, "place") and -γραφία (-graphia, "writing"). [4] In classical literature, writing about a place or places mean, now largely localized known history. UK and in Europe in general, the word topography still sometimes used in its original sense. [5]

United Kingdom (beginning in the late eighteenth century) called the Ordnance Survey in the detailed reconnaissance, and topographic survey and map the term commonly used in the 20th century. [6] The earliest scientific survey in France was called the Cassini maps produced his family over four generations. [Citation needed] The term "topographic surveys" in the US appears to be original. The earliest detailed survey in the United States during the War of 1812 established ", Army Topographical Bureau" were carried out by [7] in 1838. Topographical Engineers Corps became [8] was the national mapping assumed by the US Geological Survey in 1878, the term detailed topographical survey and mapping programs as a generic term, and as the standard adopted by most other countries have been.

In the 20th century, the term topography mapping in a broader sense, particularly in medical fields such as neurology, is used, where the levels in other areas to be used to describe the action.

Road construction

Road construction 

In a modren time road where constructed with diffrent types and mostly used the construction of road with various method

first of all site selection of road for road .

and then site clearence
use the machinary
grader will used for the lavel of sub grade there are three type of road base .
sub base
base
topping

dry compaction of road with roller and then 4 inch thcikness of aggregate laying and compaction on this then wet compaction and 2 inch thickness of sand laying on aggregate for filling the voids of aggregate .
and then taken the camber and gradient in the road .
gradient mean the side slope of road in longutudional axix and given the camber in width of road .
then prepar the surface of road with esphalt pever .

ROAD SURVEY AND DESIGN SPECIFICATION

ROAD survey and design specifications

This section requires that the design of the survey methodology and describes the requirements
Follady the design drawings for the construction of roads must be followed to prepare
And Bamyan city roads Project UNOPS / AGOC transport will be implemented under
Sector program portfolio.
Required design shown, but not limited to the following actions as are:
• road works, drainage, erosion control and associated site works and earthworks application
Different standards, codes and principles of road design to provide the minimum is intended as a guide
Standards for road geometric elements. Important for the development, such factors
The road to the natural shape of the vertical and horizontal alignments fitting coordination, as
Land (pasture), including the protection of natural features. In addition, consideration will be given to
Public access and safety practice.
UNOPS the BOQ, technical specification and standard drawings are to be used by the contractor.
These variations may be necessary from time to time and are to be discussed with the UNOPS
Description of the design engineer and approved before work.
Design standards and publications
Road design should conform to the following standards:
• Highways and roads, Fourth Edition, 2001 AASHTO Policy on Geometric Design (Green Book)
Rural Rehabilitation and Development (MRRD) and the Ministry • Ministry of Public Works (MPW)
Standards MRRD Standard Drawings.
• National Rural Access Program Standards.
• MPW technical specifications designed to NRAP.
• Ministry of Public Works, Transit Road Standards March, 2005
• AASHTO Guide for Design of Pavement Structures, 1993 and 1998 Supplement
• Design and Control of Concrete mix, 14th Edition
• AASHTO Highway Drainage Guidelines, 2007 Edition
UNOPS as determined by the Engineer • any other relevant guidelines and specifications

Triangulation Survey

Triangulation Survey

Today triangulation surveying, navigation, metrology, astrometry, binocular vision, model rockets and weapons including guns direction is used for many purposes.

Used to estimate the distance of the triangle goes back to ancient times. Thales same time, the length of his shadow and by their own measure to estimate the height of the pyramid using similar triangles, and its height (intercept theorem) as compared to the percentage recorded in the 6th century BC Greek philosopher is, [1] and from the clifftop, line-of-sight to fall from a known fixed horizontal distance measurement, and scaling the mountain height of eye ships at sea estimated distance [2] such techniques are known to the ancient Egyptians. 57 Papyrus issue and found wallet, a thousand years ago, seqt defines a shield to increase the number of runs as the ratio seked, measured as the reciprocal of the gradients. Slopes and angles Greeks a dioptra, Arabic is called the forerunner of alidade that were measured using a sighting rod. Use this tool to determine a distance range of construction is known a detailed contemporary collection, which survived in Arabic translation of Alexandria (c. 10-70 AD.), The hero Dioptra; but knowledge in Europe became lost. China, Pei Xiu's I (224-271) must identify accurately set the distance for accurate mapping fifth of his six principles, as "right-angle and acute angle measurement"; [3 ] Liu Hui (. c. 263), while the perpendicular distance measurements in inaccessible places a version of the above calculation. [4] [5]

In the field, triangulation methods apparently Roman specialist land surveyors, agromensores been used by, but Ibn al-Saffar (d. 1035) by Arabic treatise on the astrolabe as, through the Middle Ages introduced in Spain a. [6] Abu Rayhan Biruni (d. 1048) introduced the technique of triangulation to measure the size of the earth and the distance between different locations. [7] simplified the Roman techniques used by professional surveyors with more sophisticated techniques seem to co-exist. To provide such methods in Latin but it was rare (a manual on geometry, Geomatria incerti author eleventh century is a rare exception), and in other parts of Europe such techniques show only slowly percolated. [6] awareness and use of such techniques in Spain, which dates from about 1300, especially for measuring the angle used by the Middle Ages, Jacob's staff can be verified; and Portolan charts oldest living accurately survey the appearance of coastline, is dated 1296.

Gemma Frisius to mapmaking and triangulation [Edit]
On the ground, cartographer Gemma Frisius of far-away places for accurately mapping the position suggested using triangulation his Libellus de Locorum describendorum ratione the new 1533 brochure as a supplement is required, which (one way of describing the locations booklet) Peter Apian's edition of the best-selling 1524 Cosmographica. It became very influential, and techniques Germany, Austria and the Netherlands spread. Astronomer Tycho Brahe 1584 the island in the production of an estate plan, the Observatory of the important landmarks on both sides of Öresund, where was based on Hven, the island in 1579 to complete a detailed triangulation, Scandinavia the method is applied. [8] In England, William Cuningham's Cosmographical glasse method of Frisius (1559), all kinds of land (1562) Leigh Valentine's measurement of the treatise, including William, which appeared in the middle of the century books on surveying was added in increasing numbers Navigation (1571), Thomas Digges geometric rules to practice Pantometria (1571), and John Norden's surveyor's dialogue (1607) called. This map features in their county of Christopher Saxton 1570s to replace the rough-and-ready that can be used for triangulation has been suggested, but from the vantage points of the key features of others to get some bearings after that, they just guesswork by their distance can be estimated. [9]

Willebrord Snell and modern triangulation networks [Edit]
In 1615 the systematic use of triangulation networks Bergen op Zoom distance from Alkmaar to the Dutch mathematician Willebrord Snell of survey work, stems from, all of the 33 triangles using a series of quadrangles approximately 70 miles (110 km). Book Eratosthenes Batavus (Dutch Eratosthenes) observed a feat in the title published in 1617, - measuring the circumference of the earth, was able to calculate a value for the two cities, separated by a degree on the meridian were doing. Snell's planar formulas to allow for the curvature of the earth can be accurately calculated how. They also, unknown cast angle between the vertices of a triangle using the position of a point in the resection, or shown how to calculate. It depends on the vertices of a compass bearings, much more than can be measured accurately. The first control point surveying a large-scale core network, and then within the core network, the main idea of locating points in the secondary subsidiary established.

Methods of France near Snell in 1669-70, Sourdon stretching north from the Clock Tower in Paris thirteen triangles using a series of one degree of latitude with the meridian of Paris to the survey was Jean-Packard . Devices and thanks to improvements in accuracy, Picard first reasonably accurate measurement of the radius of the earth is classified as. His most important work by Cassini family was extended during the next century: Jean-Dominique Cassini and his son Jacques Cassini between 1683 and 1718, the survey of the Paris meridian from Dunkirk to Perpignan. And between 1733 and 1740 Jacques Cassini and his son Caesar built on strict principles of France as a result of the publication in 1745 of the first map, the meridian arc re-surveying the entire country, including the triangulation, taken in hand.

triangulation methods are now well established for local mapmaking, but the only other countries detailed maps of the countries surveyed to establish triangulation network that began towards the end of the 18th century. Is not completed until 1853, although the United Kingdom's principal triangulation, 1783 by Ordnance Survey was launched, and eventually Mount Everest and other Himalayan peaks named and mapped in the India, the Great Trigonometric Survey, Napoleon French state began in 1801. for, after the French full of triangulation, the German Rhineland in 1801, was extended by Jean-Joseph Tranchot Prussian general Carl von since 1815 by Müffling. Meanwhile, the famous mathematician Carl Friedrich Gauss was more real- problems of large systems of simultaneous equations to find the best fit for the solution of the least squares method is developed for the triangulation of the kingdom of Hanover, as well 1825 1821 entrusted the measure

Foundation of building

Fundation of building

The simplest Foundation, a padstone. Swedish-born Open Air Museum
Earthfast or post in the building
Buildings and structures in contact with the ground being built of wood has a long history. Technically, based on the building can be posted. To wood pilings are called grillage even marine construction and wood or steel in concrete bridge beams intersect stone or masonry walls were used on the soft or wet ground

Padstones
Probably easier Foundation padstone, both on the ground and spreads the weight of padstone ground.Staddle rocks off a certain kind of wood which raises a stone.

Foundations of Stone
Dry stone and mortar laid the foundation stone for the construction are common in many parts of the world. Dry-laid stone building foundations may have been clarified with the mortar. Sometimes the top, overlooking the course of stone, quarried stone is cut.

Rubble trench foundations
Main article: rubble trench foundation
Debris or rubble trench foundation is a shallow trench filled with stones. The grounds extend below the frost line and drain off the ground, which helps drain pipe may have. He / m² over 10 tons (2,000 pounds per square foot) are suitable for land with the ability ...