4월 9, 2021
In Dakar, Senegal, the construction of the country’s first offshore LNG export terminal is currently underway. Our heavy duty slipform technology and transfer system are used to construct and transport the caissons (16,000 tons each) to the floating dock. At the moment, 4 caisson have been completed (out of a total of 21).
Learn more about the project here![/vc_column_text][/vc_column][/vc_row]Continue reading →
4월 1, 2021
The incremental bridge launching method consists of building a complete bridge deck from one abutment of the bridge only. The superstructure segments are constructed in a casting yard behind the bridge abutment. Each segment is matchcast against the previous one and then prestressed onto the section of the superstructure that’s already been built. The superstructure is then hoisted forward equal to the length of the specific segment. You repeat this process until you reach the other side and the bridge is complete.
The ILM bridge method is very effective compared to other bridge launching methods, despite that the incremental bridge launching method usually has higher material demands. It could be compared to an on-site factory for the bridge segments providing a plethora of advantages – advantages which we will introduce to you in this article.
5 advantages of the ILM bridge method
Constructing bridges is a complex and time-consuming process even in straight and simple terrains. Now, try to imagine how valleys, areas with poor soil or water conditions affect the construction process. Equipment limitations or limited or restricted access can cause great time delays. The innovative ILM bridge method pretty much nullifies all these challenges and is often the method of choice for the most complex bridge construction projects.
Faster and more efficient
The incremental bridge launching method is one of the fastest and most efficient methods available. Most of the bridge segments and the advancement of the bridge over the pillars happen in fixed instalments with repetitions in both design and the process of fixing the segments. This speeds up the construction significantly since there won’t be any need for unique adjustments for each segment. The segments are advanced ahead in small increments, thus allowing for a fast and easy bridge construction process.
Valleys, steep slopes, streams, and other water bodies all provide a challenge to work around. Having to go back and forth with precast bridge segments can at times be difficult, or even impossible. The incremental bridge launching method’s biggest advantage is that the majority of the construction work can take place from the prefabrication areas.
Regardless of the project, all construction and assembly come with certain risks. Using the incremental bridge launching approach minimizes the risk of the construction work substantially since all the construction and assembly processes are done on-site of the prefabrication area. The lower elevation levels and not having to work around bridge pillars or half-constructed platforms also play a part in the increased safety of the ILM bridge method.
Less and smaller equipment
Due to the segments being constructed on-site, the complete project requires both less and smaller equipment, tools, and machines to deliver materials to constructed areas of the platform since all the construction and assembly takes place in the prefabrication area.
Minimal disturbance to terrain
Another advantage of the incremental bridge launching approach is that the disturbance to surrounding areas will be minimal, including environmentally sensitive areas. This is due to the fact that the launching process takes place from the prefabrication area, thus reducing the disturbance of surrounding landscape and trees compared to conventional methods.
Learn more about Bygging-Uddemanns ILM bridge method
Contact us for more information to learn more about our ILM bridge method and how we can help you construct bridges faster, easier, and safer. Read more about our bridge launching methods.Continue reading →
2월 26, 2021
One of the biggest challenges within the construction industry is moving and positioning heavy structures. This challenge becomes even more apparent in confined spaces or restricted environments. Cranes and the like are often the machine of choice when it comes to these daunting tasks. But cranes are big, and they are expensive to rent or buy.
For projects where both budget and space constraints are serious concerns, making use of a hydraulic skidding system with hydraulic jacks is a good alternative. Moving heavy loads using skidding techniques have been used for centuries, but not until the last couple of years has it become the preferred choice of many construction companies.
In this article we’ll cover two topics:
- The advantages of using a hydraulic skidding system
- The advantages of a hydraulic system
The advantages of a hydraulic skidding system
The main advantage hydraulic jacks and hydraulic skidding systems have over cranes is the significantly lower requirements in terms of cost, space, set-up and maintenance. Cranes need a lot of space for set-up and overhead clearance.
If there’s insufficient headroom for a crane where winches and tackle systems are not enough to lift the load vertically, you may need to erect an inclined plane to roll or skid the load up. Since many construction sites often involve confined spaces and different obstructions, the workers will have a hard time maneuvering the crane around those areas which increases the risk of accidents and causes the work process to become much slower since they need to take extra precaution.
In comparison, a hydraulic skidding system is relatively less dangerous due to the strategically low profile of the tracks. The load being carried will never be suspended freely and the hydraulic skidding system doesn’t require any holdback, winches or any other kind of external force or restraint.
The hydraulic system advantages
The advantage of hydraulics extends past hydraulic jacks and hydraulic skidding systems though. While every system has its own merits and demerits, hydraulics has quickly become one of the most appreciated types of techniques due to its flexible and agile nature. Here are a few advantages of hydraulic systems:
- Easy to control and very precise. The system operator can easily start, stop, accelerate and slow down the system using simple levers and push-buttons.
- Easy to maintain due to fewer moving parts.
- Can deliver constant torque or force regardless of speed changes.
- Easy to spot leakages of a hydraulic system.
- Centralized lubrication systems that automatically lubricates and protects vital points.
- Large amounts of power can be transmitted using small, flexible hoses and tubes.
- Does not cause any sparks, which means they are safe to use in chemical plants and mines.
- Can maintain its viscosity of airworthiness, its density and the temperature of the fluid in hot environments.
- Hydraulic power can be transmitted through flexible, varying lines.
- Hydraulic system components allow for micrometric speed variations.
- A hydraulic system minimizes undesirable noises.
- Easy to repair.
Bygging-Uddemanns hydraulic skidding system
For many tasks, a skidding system is a much safer and more effective solution for moving complex objects compared to cranes. Our track system is developed for repeated movement of heavy loads. The system is distinguished from others by being extremely robust (can handle loads up to 20,000 tons) and consists of two main components; skidway beams and steel track.
Read more about our hydraulic skidding system or contact us for more information.Continue reading →
2월 2, 2021
Storage tanks play a vital role in society and national life, in petrochemical, national defence, transportation and our daily life. Without storage tanks a lot of industries, especially the petrochemical enterprises, wouldn’t be able to produce regularly.
The most widely used storage tanks are made out of steel which accounts for the largest area and the highest proportion of investment in oil depot construction projects. The technology and economic performance of storage tanks directly impacts the total cost, operating cost and capital cost of a project.
Storage tank construction is dominated by two different methods for aboveground vertical tank construction:
- The traditional method (bottom to top)
- The jacking method (top to bottom)
The question is: which storage tank construction method is the most suited for your project? In this article we’ll give a brief description of each method and the advantages and disadvantages of each method.
The Traditional method
The traditional method for storage tank construction assembles each sheet of the tanks wall starting from the bottom ring of the tank, then each sheet is assembled one by one from the bottom to top until the tank is completely constructed.
The process is as follows:
- Bottom of tank is installed
- First ring, the lowest, of the tank wall is installed
- Second ring of the tank wall is installed, the third ring of…. etc.
- Reinforcement ring is installed
- Floating roof is installed
- Accessories are installed
- Easy to master
- Makes full use of large hoisting equipment
- Increase the depth of prefabrication
- Convenient for extension of automatic welding technology
- Requires a larger site and scaffoldings
- Difficult to construct storage tanks due to technical difficulties, for example: high altitude work
The Jacking method
The jacking method works in the opposite direction, from top to bottom, by assembling the sheet of the top ring first, then lifting the assembled wall to assemble the lower wall, and continuing this process of lifting assembled walls until all of the tank wall is constructed.
There are several jacking methods for storage tank construction. The most common method using a hydraulic jacking system which we will describe below.
The process is as follows:
- Bottom of tank is installed
- Hydraulic jacking system is installed
- Roof of the tank is installed
- First ring (top) of the tank wall is assembled
- First ring of the tank wall is lifted
- Second ring of the tank wall is assembled
- Second ring of the tank wall is lifted, repeat step 6-7 for all rings until the wall is fully assembled
- Accessories are installed
- Constructing the tank is short, effective and tank quality can easily be controlled
- Avoid risky high-altitude work where the whole installation process takes place on the ground without any scaffolding
- The activities of the storage tanks construction are larger, where the security can be better ensured
- Required hoisting equipment and construction tools are relatively more simple
- Due to the fact that the jacking method lifts the tank, the higher the tank is, the more lifting power is required. Thus, this way of constructing storage and welded tanks is suitable to construct relatively small tanks.
Which construction method for building storage and welded tanks is the best?
Overall, the jacking method comes out on top. It is both economical and fast where all construction work is performed on the ground, ensuring high degree of safety and accuracy in the workmanship.
We at Bygging-Uddemann offer one of the world’s leading steel tank manufacturing and construction methods based on the jacking method where it can be applied to different types of storage and welded tanks of all sizes. Contact us for more information or read more about our method here.Continue reading →
9월 30, 2020
Slipform construction is usually seen as the best-suited building method when it comes to building tall concrete structures. So what exactly does the term slipform mean? Simply put, slipform is the name of the hydraulically controlled formwork into which concrete is poured. Also known as the continuously formed or slipform construction method, it is widely used in construction projects such as bridges, buildings, dams and towers.
Why is slipforming so commonly used? Undoubtedly, slipform construction is the fastest and most economical method available today for the construction of high-rise concrete structures. The construction process encompasses a continuous concrete pour that sets quickly. As the slip form method greatly depends on the properties of concrete to set quickly, a balance must be maintained between its workability and quick-setting capacity. The different types of slipform construction methods executed by our specialists at Bygging Uddemann are traditional, gantry, tapered and conical slipforming.
Hydraulically Controlled Slipform Method
With numerous technological advancements in modern construction methods, the way companies erect concrete structures has evolved as well. The newest machines and equipment in the market aim to simplify complex construction processes which were followed earlier. One of the oldest and most conventional slipform technology used even today is traditional slipforming. In 1943, Bygging Uddemann invented the hydraulically controlled slipform method that is still used worldwide today. The procedure involves hydraulic jacks along with other equipment to raise the levels of structures. Such a hydraulically controlled slipform method is mainly used for the construction of tall structures such as domes, towers and skyscrapers.
Other slipforming methods
Besides the traditional slipform methods, there are also other methods such as conical slipforming and gantry slipforming.
The conical slipforming method is a more developed version of traditional slipforming. The distinguishing factor between the two methods is that in conical slipforming, the technique involves a change in the length of the cross-section diameter. This is because the variation largely depends on the height of the structure being constructed. It is this change in the cross-section which eventually results in the conical shape of the structure. The conical slipforming method was developed to construct concrete structures, with continuously changing dimensions such as wall thickness. The thickness of the wall depends on multiple factors such as the size of the cone, construction material and the height of the structure.
The tapering slipform method is used to construct high rise structures to reduce the duration of such projects. In this, the formwork is used with overlapping sections so that one gradually slides over the other. It is commonly found in the construction of chimneys.
Nowadays, gantry slipform has replaced the traditional slipforming method in the construction of repeated concrete structures like caisson production. It is a more cost-effective option and foregoes the need for dismantling, reassembling as well as the use of cranes. This method has also proven to be more convenient and safer for on-site workers due to the additional space for them to store equipment and move around. The gantry slipform method has climb tubes and jacks outside the caisson geometry, unlike traditional slipform. This facilitates the work to be completed faster with the jack rods lasting for the complete project.
Choose the right slipform construction method for your project
Depending upon the kind of concrete structure being erected, it is wise to consult a reputed construction company on the slipform technology and equipment to be used. Businesses can learn more about slipform engineering by contacting us at Bygging Uddemann for a consultation or to get a quote for tailor-made slipforming methods.
9월 30, 2020
It is our pleasure to announce that we have been awarded the contract by Daelim Industrial Co., LTD for IP-CCV Transfer system for transfer of 30 nos caissons weighing up to 16 500 ton each.Continue reading →
9월 4, 2020
National Geographic has made a documentary about Singapore “City of Innovation”.
The documentary explores the technologies that are changing how modern cities evolve. Among other things, they visit our ongoing project: Tuas finger 3.
Here’s a clip from the documentary showing our technology and equipment in full action.
9월 2, 2020
Bygging-Uddemann have been honoured the opportunity to speak at the annual Floating Offshore Wind Turbines, FOWT2020 conference, which is the world’s largest event dedicated to floating wind. Our CEO, Mr. Henrik Magnusson, and Sales Director, Mr. Anders Axelsson, will share our vast experience on localised serial production of concrete structures during the supply-chain roundtable on the 8th of September.Continue reading →
8월 27, 2020
The construction of any structure, be it a bridge or a tank, requires elaborate processes involving many steps. Formwork is an essential part of the construction process. With a wide range of technological advancements, the construction industry is constantly evolving. From the introduction of new methods for the construction of various structures to developing and using machines that greatly reduce the risk factor, the industry has reached new heights. The use of formwork for the concrete slab and lifting heavy equipment has generated a great demand in the construction industry.
The first question to ask is, what is formwork? Formwork is a temporary structure that can support a part or even the whole of a permanent structure until it can support itself. The components are assembled to form the temporary structure. One of the most common methods of keeping the formwork in place is a supportive scaffold system. Sometimes heavy lifting equipment is used in place of scaffolding. Bygging Uddemann has the most comprehensive systems in the business for formwork construction. Our efficient systems are suitable for all kinds of heavy loads whose placing, removal and transport require a high degree of precision.
Requirements of Good Formwork
The use of concrete formwork has become a common practice among leading construction companies worldwide. Construction projects that require formwork include roof and steel structures, bridges, bridge sections, and concrete slabs. Good formwork should satisfy all the following requirements listed below:
- Should be sturdy and durable to withstand all kinds of dead loads
- Should be braced efficiently and propped horizontally and vertically, to retain shape
- The joints in the formwork should prevent leakage of cement grout
- Should allow for removal of various parts in desired sequences without concrete damage
- The formwork material should be affordable, suitable for reuse and easily available
- It should be as light as possible and accurate set to the desired line
- It should rest on a firm base and be levelled on a plane surface
- The formwork material should be able to withstand exposure to high temperatures
- Should have superior workmanship and frequent inspections
Types of formwork used in concrete construction
The types of formwork systems that can be used for the construction of a concrete slab mainly depends upon important factors: the type of the structure and the material to be used. The different types of materials that can be used are timber, steel, aluminium, plastic, and concrete. Some of the different types of formwork are beam formwork, column formwork, slab formwork and concrete formwork to name a few.
Concrete formwork is one of the most preferred options in modern construction. This is because concrete is a virtually indestructible material when reinforced, making it the perfect choice for major construction projects, and even complex, detailed structures. When it comes to formwork, construction businesses should select the type most suited to the structure to be built. While there are many formwork systems available such as cassette, climbing, flexible, slipform and horizontal formwork, the last option is a commonly used one.
As mentioned earlier, businesses can choose from a myriad of options when it comes to formwork materials. However, the smaller, lighter horizontal formwork system uses aluminium, steel, and fibreglass. It consists of a series of preformed interconnected falsework bay and decking panels that are generally used in the construction of slabs. Being a lighter and safer option, this system is more ideal compared to traditional options.
Want more information about concrete formwork construction? Contact us at Bygging Uddemann for a quote.
8월 26, 2020
One of Bygging-Uddemann’s targets for the future is to contribute to creating sustainable, resistant and including infrastructures. That is why Bygging-Uddemann think that Ideol’s pioneering solution for floating offshore wind power is really a big leap towards that goal.Continue reading →