12월 18, 2020
When talking about construction, the first thing that comes to mind is the construction of a building or a bridge. No doubt, bridge building and launching is one of the key areas in the construction industry. The bridge launching process is a complex, lengthy process with many aspects involved depending on factors such as project size and resources at hand. There are various bridge launching techniques such as cast-in-situ, precast and cable-stayed method. One such bridge launching method which simplifies bridge construction is the incremental launching method procedure. Plenty of planning and detail goes into the construction of a strong and operational ILM bridge. Standard construction methods need to be followed in order to avoid construction mishaps.
Let’s take a closer look at the construction cycle of incremental launching bridges as well as the suitability of the ilm bridge construction method.
Construction cycle of incremental launching bridge
The ILM bridge method follows a suitable technological design with certain aspects of the ILM method which is projected to the superstructure design. This brings in many advantages and is highly effective in comparison to other methods, in spite of the higher material demands. Some of the major advantages include minimum formwork, maximum productivity, and reinforcement assemblages along the whole length of the segment, etc. It is virtually a factory for bridge construction in segments.
Now, what does the construction cycle of an ILM look like? Simply put, the principle behind the incrementally launched bridge comprises building superstructure segments in a casting yard that could be located behind the bridge abutment. Every segment is matchcast against the earlier one and then prestressed to the section of superstructure built previously. Then the entire superstructure is jacked forward to a distance equal to the length of this segment. Until the bridge is in its final position, this process is repeated after which the temporary bearings are replaced by the permanent bearings. This construction method is generally used for bridges with a constant cross-sectional shape throughout their length. The bridge should either be straight or have a constant vertical and horizontal curvature. Additionally, workers’ safety is an important element to be considered. The time taken to build each part of the bridge and eventually converting it into a single piece requires enormous accuracy and precision
Suitability of ILM bridge construction method
The incremental launching method is convenient and efficient, applicable mainly to structures with high piers or locations where the formwork on solid centring cannot be used. This could include areas above the existing built-up area and water areas. If we were to analyze the suitability of this method compared to others, the ILM procedure is faster, uses less space with its superstructure assembly, and causes minimal disturbance to its surrounding environment, especially sensitive areas. Moreover, it offers increased worker safety as the erection work is carried out at a lower elevation and is used for bridge decks with lengths greater than 250m.
Hence, although it requires specialized construction equipment, considerable analysis and design expertise, incremental bridge launching is still considered a popular bridge launching method. This is due to the fact that even today it is the most feasible method for constructing bridges in environmentally protected or inaccessible areas such as deep valleys and water crossings, as well as locations with poor soil conditions which make accessible equipment inconvenient. Businesses can learn more about the incremental launching method procedure by contacting us at Bygging Uddemann for a consultation or to get a quote.
12월 11, 2020
Each year Bygging-Uddemann makes a Christmas donation to charity. In these difficult times, it feels more important than ever. This year we make our donation to Unicef, supporting their work to save children’s lives and to help them fulfil their potential.
View their website here!
Merry Christmas and a Happy New Year!Continue reading →
10월 29, 2020
Bygging Uddemann and Ideol combine their world leading and fully complementary know-hows and signed a formal collaboration agreement aiming at further guaranteeing the on-time and on-budget delivery of Ideol’s concrete floaters for offshore wind, building on existing and proven construction methods.
Read the complete pressrelease 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 →
8월 12, 2020
We are pleased to announce that caisson production is now ongoing for project “Construction Works of Wave-breaking Revetment (Section 2) for Donghae Port Tri-level Development Caisson Project”. For this project we are supplying Gantry Slipform and IP-CCV Transfer System to SK ENGINEERING & CONSTRUCTION CO., LTD.Continue reading →