At last, an update in our #bike path #construction from today, here in #Ottawa. Holidays are over and the crews are back to work. The last physical work on the bridge is underway, installing a chain link fence to stop stupid humans falling off the #bridge. I have no idea what the concrete blocks are all about. They just appeared and seem to serve no purpose. The black objects are the bundles of fencing material.
#construction #environnement
La Fédération Ecoconstruire, Edifice Formation et Compétences Emploi ont le plaisir de vous informer du
lancement de deux action de formations certifiantes :
du 9 Février au 31 Octobre 2024 à Sevran (93)
Vous souhaitez faire partie des métiers de la transition écologique dans le secteur du bâtiment ?
Ces formations sont destinées en priorité aux demandeurs d'emploi résidant en Île-de-France et peu diplômées,
également ouvertes aux demandeurs d'emploi diplômés ou non diplômés résidant à Paris
📅 RÉUNION D’INFORMATION COLLECTIVE LE 15 JANVIER à 14h
À COMPÉTENCES EMPLOI SEVRAN
1 Av. Salvador Allende, 93270 Sevran
Financement possible selon les situations (pour en savoir plus nous contacter et remplir le formulaire d'inscription)
https://www.federation-ecoconstruire.org/se-former-s-informer/nos-formations-en-ile-de-france/
One more update in our #bike path #construction from yesterday, here in #Ottawa. The tarps have been removed showing the detector plates and the vehicle restriction posts in place. Remaining seems to be signage, landscaping (spring I suspect) and removing the construction fencing to allow it to be used. Not sure if that latter item will happen soon or not, as it seems to be up to the city to do that.
One more step for our #bike path #construction today in #Ottawa. With the concrete still drying, the steel vehicle restriction posts were installed today. These are held in place with solid steel "L" pins and bolts with nuts, so lets see how that works out.
News from our #bike path #construction today in #Ottawa. Today the crew poured the cement that holds the detector plates and the posts in place. Next we will see how it all looks when it is dry and the post tops are installed and secured. The it will just be the signs and probably the landscaping in the springtime.
A few more pictures from the #bike path #construction today in #Ottawa. Today the crew started work on the detector plates and vehicle-exclusion posts. I assume they are waiting for cement to arrive to put them into place.
Bonjour tout le monde, je suis #nouveauici. Mes centres d'intérêt sont #alimentation, #association, #commerce, #construction, #culture, #divertissement, #évènement, #french, #immobilier, #immobilier_commercial, #immobilierdentreprises, #investissement, #mode, #music, #noël, #sport, #travail et #voiture.
Pacific islands are looking to tradition to help address the climate crisis that threatens their existence.#BusinessandEconomy #ClimateCrisis #Construction #AsiaPacific #Fiji #Samoa #Tuvalu
Can traditional architecture help build a ‘more resilient future’?
And here is the western part of our #bike pathway under #construction, on day three. Asphalt still scheduled to arrive on 14 December.
Some more photos from today of the eastern part of our #bike pathway under #construction, on day three. This is now done and waiting for asphalt, which is still scheduled to arrive on 14 December.
Some photos from today of our #bike pathway under #construction, on day two. Asphalt still scheduled to arrive on 14 December.
An autonomous excavator built a six metre-high and sixty-five-metre-long dry-stone wall. It picks up boulders, scans them, algorithmically determines the optimal placement for them, and places them.
The wall is part of "a digitally planned and autonomously excavated landscape and park."
"Using sensors, the excavator can autonomously draw a 3D map of the construction site and localise existing building blocks and stones for the wall's construction. Specifically designed tools and machine vision approaches enable the excavator to scan and grab large stones in its immediate environment. It can also register their approximate weight as well as their centre of gravity. An algorithm determines the best position for each stone, and the excavator then conducts the task itself by placing the stones in the desired location."
"Our geometric planning algorithm uses a combination of constrained registration and signed-distance-field classification to determine how these should be positioned toward the formation of stable and explicitly shaped structures."
The paper is paywalled but I can tell you, because I was trying to figure out how a code CAD system called SummonScript works, that a signed distance field is a grid of voxels where the contents of each cell is a distance that represents the closest distance to the surface of an object. By convention, positive numbers represent 'outside' the object, while negative numbers represent 'inside' the object.
As for "constrained registration", I don't know why they call it 'registration', but the basic idea is that you put in two geometric objects, and the algorithm figures out what geometric transformations (translations, rotations, and scaling) turns the first object into something as close as possible to the second object. It's called 'constrained' because you can tack on additional constraints that you want the algorithm to satisfy. These could be angles that the algorithm is not allowed to change or points that must remain aligned with other points. Since the research paper is paywalled I can't give any more specifics of the algorithm here. Obviously one of the constraints is that it can't do scaling since the size of the stones can't change.
Autonomous excavator constructs a six-metre-high dry-stone wall | ETH Zurich
#Bike pathway under #construction. Dusk photos from today after a full day's work! 18" of gravel down and asphalt arriving on 14 December.
L’entreprise Paquet, installée à Fontaine-les-Dijon, a inauguré le 17 novembre dernier sa nouvelle centrale à béton.
Alors que certaines régions réfléchissent déjà au terme de la construction en béton [1], à Dijon, on inaugure une nouvelle centrale vantée pour sa #productivité. Ça se passe à Fontaine-les-Dijon, juste en face de la #Rubs, friche en rive du Suzon menacée d’être bétonnée. La nouvelle centrale à béton est composée de quatre silos d’une capacité de 60 tonnes chacun. Et elle est capable de fournir 50 m2 de béton à l’heure, soit 15 000 m2 par an, pas moins de 5 fois plus que l’ancienne centrale. Les entrepreneurs et politiciens sont très fiers de leur nouveau jouet et se gaussent de participer à la noyade du monde sous le béton.
Le pire est qu’ils se croient écolos, affirmant que leur nouvelle centrale est conforme aux attentes écologiques. C’est-à-dire qu’elle va permettre de faire des économies d’énérgies, que les boues sont évacuées en carrière et que l’eau de lavage est recyclée. C’est hallucinant d’entendre encore des choses pareilles aujourd’hui. Espérons que la crise de la #construction entraînera dans sa chute le monde du béton.
Notes
[1] La #Flandre abandonne le béton en 2040 et la #Wallonie en 2050.
I am thinking the arrival of this backhoe is phase one of our new #bike path. I talked to one of the contractor's supervisor's yesterday and he told me that they were bringing in a backhoe and will start digging on Monday morning, so this should be it. The new bike path is scheduled to be completed by 22 December, so a nice Christmas gift for our neighbourhood. It will provide connections north to downtown and for us to the #Ottawa River and the sailing club, and to the south to the village of Osgoode, some 26.5 km away. It will remove our need to bike on busy roads, too. It is going to be great when done. More photos to come over the construction period.
https://ici.radio-canada.ca/info/videos/1-8859910/un-gratte-ciel-entierement-en-bois
#bois #construction #isolation #gratte-ciel #suède #canada #ressources #climat #environnement
