Champ de Mars, Paris: Eiffel Tower
Once the tallest structure in the world, the Eiffel Tower is probably Europe's best known landmark and Paris's most famous symbol.
You couldn't possibly visit Paris without seeing the Eiffel Tower. Even if you do not want to visit this world famous structure, you will see its top from all over Paris. The tower rises 300 meters tall (984 ft); when it was completed at the end of the 19th century it was twice as high as the Washington Monument, at the time the tallest structure in the world.
1889 World Exhibition
The Eiffel Tower was built for the World Exhibition in 1889, held in celebration of the French Revolution in 1789.
The construction was only meant to last for the duration of the Exposition, but it still stands today, despite all protests from contemporary artists who feared the construction would be the advent of structures without 'individuality' and despite the many people who feared that this huge 'object' would not fit into the architecture of Paris.
Today, there is no such aversion anymore among the Parisians, and one could not imagine Paris without the Eiffel Tower, in fact it has become the symbol of the City of Light.
See Paris on walking tour from the Eiffel Tower
You have 4 hours to visit the Eiffel Tower and some of Paris. What should you do? The first possibility is to go on a Paris tour, including the Eiffel Tower.
You could also visit the Eiffel Tower and a few of the interesting museums near Eiffel Tower.
Start from Trocadero metro station (marker A on map below) on line 6 and 9. Enjoy the spectacular view of the Eiffel Tower from Palais de Chaillot.
Walk down to the Eiffel Tower (15 minutes) across the lovely Palais de Chaillot gardens and the Iena bridge. Take your time to visit the Eiffel Tower (B).
Walk to Quai Branly (15 minutes). Visit the museum (C). Walk across Passerelle Debilly (D) to Palais de Tokio (F, 15 minutes). You may visit the museum.
Finish at Iena metro station (G, 10 minutes walk) and the Guimet Museum. Have a great time.
Attractions nearby
Champ de Mars
Address: Between Eiffel Tower and École Militaire
7e arrondissement
Distance: 350 m / 0.2 mi
Musée du Quai Branly
Address: 37 Quai Branly
7e arrondissement
Distance: 350 m / 0.2 mi
Palais de Chaillot
Address: 17 place du Trocadéro
16e arrondissement
Distance: 650 m / 0.4 mi
Musée de la Marine
Address: Place du Trocadéro 17
Distance: 650 m / 0.4 mi
Cité de l'Architecture et du Patrimoine
Address: Place du Trocadéro 1
Distance: 650 m / 0.4 mi
Musée de l'Armée
Address: Rue de Grenelle 129
7e arrondissement
Distance: 1.3 km / 0.8 mi
Hôtel des Invalides
Address: Rue de Grenelle 129
7e arrondissement
Distance: 1.4 km / 0.8 mi
Dôme des Invalides
Address: Hôtel des Invalides
7e arrondissement
Distance: 1.4 km / 0.9 mi
Pont Alexandre III
Address: Between 7th and 8th arrondissement, near Esplanade des Invalides
Distance: 1.5 km / 0.9 mi
Champs-Elysées
Address: Between Place de la Concorde and Arc de Triomphe
8e arrondissement
Distance: 1.6 km / 1 mi
Popularity
More than 200,000,000 people have visited the tower since its construction in 1889, including 6,719,200 in 2006. The tower is the most-visited paid monument in the world.
History
The design of the Eiffel Tower was originated by Maurice Koechlin and Émile Nouguier, two senior engineers who worked for the Compagnie des Etablissements Eiffel after discussion about a suitable centrepiece for the proposed 1889 Exposition Universelle, a World's Fair which would celebrate the centennial of the French Revolution. In May 1884 Koechlin, working at his home, made an outline drawing of their scheme, described by him as "a great pylon, consisting of four lattice girders standing apart at the base and coming together at the top, joined together by metal trusses at regular intervals". Initially Eiffel himself showed little enthusiasm, but he did sanction further study of the project, and the two engineers then asked Stephen Sauvestre, the head of company's architectural department, to contribute to the design. Sauvestre added decorative arches to the base, a glass pavilion to the first level and other embellishments. This enhanced version gained Eiffel's support, and he bought the rights to the patent on the design which Koechlin, Nougier and Sauvestre had taken out, and the design was exhibited at the Exhibition of Decorative Arts in the autumn of 1884 under the company name. On 30 March 1885 Eiffel read a paper on the project to the Société des Ingiénieurs Civils: after discussing the technical problems and emphasising the practical uses of the tower, he finished his talk by saying that the tower would symbolise "not only the art of the modern engineer, but also the century of Industry and Science in which we are living, and for which the way was prepared by the great scientific movement of the eighteenth century and by the Revolution of 1789, to which this monument will be built as an expression of France's gratitude."
Little happened until the beginning of 1886, when Jules Grévy was re-elected as President and Édouard Lockroy was appointed as Minister for Trade. A budget for the Exposition was passed and on 1 May Lockroy announced an alteration to the terms of the open competition which was being held for a centerpiece for the exposition, which effectively made the choice of Eiffel's design a foregone conclusion: all entries had to include a study for a 300 m (980 ft) four-sided metal tower on the Champ de Mars. On 12 May a commission was set up to examine Eiffel's scheme and its rivals and on 12 June it presented its decision, which was that all the proposals except Eiffel's were either impractical or insufficiently worked out. After some debate about the exact site for the tower, a contract was finally signed on 8 January 1887. This was signed by Eiffel acting in his own capacity rather than as the representative of his company, and granted him one and a half million francs toward the construction costs: less than a quarter of the estimated cost of six and a half million francs. Eiffel was to receive all income from the commercial exploitation of the tower during the exhibition and for the following twenty years. Eiffel later established a separate company to manage the tower, putting up half the necessary capital himself.
Construction
Work on the foundations started in January 1887. Those for the east and south legs were straightforward, each leg resting on four 2 m (6.6 ft) concrete slabs, one for each of the principal girders of each leg but the other two, being closer to the river Seine were more complicated: each slab needed two piles installed by using compressed-air caissons 15 m (49 ft) long and 6 m (20 ft) in diameter driven to a depth of 22 m (72 ft) to support the concrete slabs, which were 6 m (20 ft) thick. Each of these slabs supported a block built of limestone each with an inclined top to bear a supporting shoe for the ironwork. Each shoe was anchored into the stonework by a pair of bolts 10 cm (4 in) in diameter and 7.5 m (25 ft) long. The foundations were complete by 30 June and the erection of the ironwork began. The very visible work on-site was complemented by the enormous amount of exacting preparatory work that was entailed: the drawing office produced 1,700 general drawings and 3,629 detailed drawings of the 18,038 different parts needed. The task of drawing the components was complicated by the complex angles involved in the design and the degree of precision required: the position of rivet holes was specified to within 0.1 mm (0.04 in) and angles worked out to one second of arc. The finished components, some already riveted together into sub-assemblies, arrived on horse-drawn carts from the factory in the nearby Parisian suburb of Levallois-Perret and were first bolted together, the bolts being replaced by rivets as construction progressed. No drilling or shaping was done on site: if any part did not fit it was sent back to the factory for alteration. In all there were 18,038 pieces joined by two and a half million rivets
.
At first the legs were constructed as cantilevers but about halfway to the first level construction was paused in order to construct a substantial timber scaffold. This caused a renewal of the concerns about the structural soundness of the project, and sensational headlines such as "Eiffel Suicide!" and "Gustave Eiffel has gone mad: he has been confined in an Asylum" appeared in the popular press. At this stage a small "creeper" crane was installed in each leg, designed to move up the tower as construction progressed and making use of the guides for the lifts which were to be fitted in each leg. The critical stage of joining the four legs at the first level was complete by March 1888. Although the metalwork had been prepared with the utmost precision, provision had been made to carry out small adjustments in order to precisely align the legs: hydraulic jacks were fitted to the shoes at the base of each leg, each capable of exerting a force of 800 tonnes, and in addition the legs had been intentionally constructed at a slightly steeper angle than necessary, being supported by sandboxes on the scaffold.
No more than three hundred workers were employed on site, and because Eiffel took safety precautions, including the use of movable stagings, guard-rails and screens, only one man died during construction.
Passenger lifts - Ground to the second level
The original lifts (elevators) to the first and second floors were provided by two companies. Both companies had to overcome many technical obstacles as neither company (or indeed any company) had experience with installing lifts climbing to such heights with large loads. The slanting tracks with changing angles further complicated the problems. The East and West lifts were supplied by the French company Roux Combaluzier Lepape, using hydraulically powered chains and rollers. The North and South lifts were provided by the American company Otis using car designs similar to the original installation but using an improved hydraulic and cable scheme. The French lifts had a very poor performance and were replaced with the current installations in 1897 (West Pillar) and 1899 (East Pillar) by Fives-Lille using an improved hydraulic and rope scheme. Both of the original installations operated broadly on the principle of the Fives-Lille lifts.
The Fives-Lille lifts from ground level to the first and second levels are operated by cables and pulleys driven by massive water-powered pistons. The hydraulic scheme was somewhat unusual for the time in that it included three large counterweights of 200 tonnes each sitting on top of hydraulic rams which doubled up as accumulators for the water. As the lifts ascend the inclined arc of the pillars, the angle of ascent changes. The two lift cabs are kept more or less level and indeed are level at the landings. The cab floors do take on a slight angle at times between landings.
The principle behind the lifts is similar to the operation of a block and tackle but in reverse. Two large hydraulic rams (over 1 metre diameter) with a 16 metre travel are mounted horizontally in the base of the pillar which pushes a carriage (the French word for it translates as chariot and this term will be used henceforth to distinguish it from the lift carriage) with 16 large triple sheaves mounted on it. There are 14 similar sheaves mounted statically. Six wire ropes are rove back and forth between the sheaves such that each rope passes between the 2 sets of sheaves 7 times. The ropes then leave the final sheaves on the chariot and pass up through a series of guiding sheaves to above the second floor and then through a pair of triple sheaves back down to the lift carriage again passing guiding sheaves.
This arrangement means that the lift carriage, complete with its cars and passengers, travels 8 times the distance that the rams move the chariot, the 128 metres from the ground to the second floor. The force exerted by the rams also has to be 8 times the total weight of the lift carriage, cars and passengers, plus extra to account for various losses such as friction. The hydraulic fluid was water, normally stored in three accumulators, complete with counterbalance weights. To make the lift ascend, water was pumped using an electrically driven pump from the accumulators to the two rams. Since the counterbalance weights provided much of the pressure required, the pump only had to provide the extra effort. For the descent, it was only necessary to allow the water to flow back to the accumulators using a control valve. The lifts were operated by an operator perched precariously underneath the lift cars. His position (with a dummy operator) can still be seen on the lifts today.
The Fives-Lille lifts were completely upgraded in 1986 to meet modern safety requirements and to make the lifts easier to operate. A new computer-controlled system was installed which completely automated the operation. One of the three counterbalances was taken out of use, and the cars were replaced with a more modern and lighter structure. Most importantly, the main driving force was removed from the original water pump such that the water hydraulic system provided only a counterbalancing function. The main driving force was transferred to a 320 kW electrically driven oil hydraulic pump which drives a pair of hydraulic motors on the chariot itself, thus providing the motive power. The new lift cars complete with their carriage and a full 92 passenger load weigh 22 tonnes.
Owing to elasticity in the ropes and the time taken to get the cars level with the landings, each lift in normal service takes an average of 8 minutes and 50 seconds to do the round trip, spending an average of 1 minute and 15 seconds at each floor. The average journey time between floors is just 1 minute.
The original Otis lifts in the North and South pillars in their turn proved to be inferior to the new (in 1899) French lifts and were scrapped from the South pillar in 1900 and from the North pillar in 1913 after failed attempts to repower them with an electric motor. The North and South pillars were to remain without lifts until 1965 when increasing visitor numbers persuaded the operators to install a relatively standard and modern cable hoisted system in the north pillar using a cable-hauled counterbalance weight, but hoisted by a block and tackle system to reduce its travel to one third of the lift travel. The counterbalance is clearly visible within the structure of the North pillar. This latter lift was upgraded in 1995 with new cars and computer controls.
The South pillar acquired a completely new fairly standard electrically driven lift in 1983 to serve the Jules Verne restaurant. This was also supplied by Otis. A further four-ton service lift was added to the South pillar in 1989 by Otis to relieve the main lifts when moving relatively small loads or even just maintenance personnel.
The East and West hydraulic (water) lift works are on display and, at least in theory, are open to the public in a small museum located in base of the East and West tower, which is somewhat hidden from public view. Because the massive mechanism requires frequent lubrication and attention, public access is often restricted. However, when open, the wait times are much less than the other, more popular, attractions. The rope mechanism of the North tower is visible to visitors as they exit from the lift.
Passenger lifts - Second to the third level
The original lifts from the second to the third floor were also of a water-powered hydraulic design supplied by Léon Edoux. Instead of using a separate counterbalance, the two lift cars counterbalanced each other. A pair of 81-metre-long hydraulic rams were mounted on the second level reaching nearly halfway up to the third level. A lift car was mounted on top of the rams. Ropes ran from the top of this car up to a sheave on the third level and back down to a second car. The result of this arrangement was that each car only travelled half the distance between the second and third levels and passengers were required to change lifts halfway walking between the cars along a narrow gangway with a very impressive and relatively unobstructed downward view. The ten-ton cars held 65 passengers each or up to four tons.
One interesting feature of the original installation was that the hoisting rope ran through guides to retain it on windy days to prevent it flapping and becoming damaged. The guides were mechanically moved out of the way of the ascending car by the movement of the car itself. In spite of some antifreeze being added to the water that operated this system, it nevertheless had to close to the public from November to March each year.
The original lifts complete with their hydraulic mechanism were completely scrapped in 1982 after 97 years of service. They were replaced with two pairs of relatively standard rope hoisted cars which were able to operate all the year round. The cars operate in pairs with one providing the counterbalance for the other. Neither car can move unless both sets of doors are closed and both operators have given a start command. The commands from the cars to the hoisting mechanism are by radio obviating the necessity of a control cable. The replacement installation also has the advantage that the ascent can be made without changing cars and has reduced the ascent time from 8 minutes (including change) to 1 minute and 40 seconds. This installation also has guides for the hoisting ropes but they are electrically operated. The guide once it has moved out of the way as the car ascends automatically reverses when the car has passed to prevent the mechanism becoming snagged on the car on the downward journey in the event it has failed to completely clear the car. Unfortunately these lifts do not have the capacity to move as many people as the three public lower lifts and long lines to ascend to the third level are common. Most of the intermediate level structure present on the tower today was installed when the lifts were replaced and allows maintenance workers to take the lift halfway.
The replacement of these lifts allowed the restructuring of the criss-cross beams in upper part of the tower and further allowed the installation of two emergency staircases. These replaced the dangerous winding stairs that were installed when the tower was constructed.
Restaurants
The tower has two restaurants: Le 58 tour Eiffel, on the first floor 311 ft (95 m) above sea level; and the Le Jules Verne, a gastronomical restaurant on the second floor, with a private lift. This restaurant has one star in the Michelin Red Guide. In January 2007, the multi-Michelin star chef Alain Ducasse was brought in to run Jules Verne
Economics
The American TV show Pricing the Priceless speculates that in 2011 the tower would cost about $480,000,000 to build, that the land under the tower is worth $350,000,000, and that the scrap value of the tower is worth $3,500,000. The TV show estimates the tower makes a profit of about $29,000,000 per year, though it is unlikely that the Eiffel Tower is managed so as to maximize profit.
It costs $5,300,000 to repaint the tower, which is done once every seven years. The electric bill is $400,000 per year for 7.5 million kilowatt-hours.
The Tokyo Tower in Japan is a very similar structure of very similar size. It was finished in 1958 at a final cost of ¥2.8 billion ($8.4 million in 1958).
View Eiffel Tower in a larger map
Comments