What are civil engineering projects
BIM for road and civil engineering projects
The entire building world is moving ever further in the direction of model-oriented planning and building. The family-run construction company Max Bögl with headquarters in Neumarkt in the Upper Palatinate has been one of the pioneers - not only in German-speaking countries - for several years. The company is now one of the largest construction, technology and service companies in the German construction industry. In order to always meet the high quality standards - even with complex construction tasks - the partnership with clients, project participants and partner companies is firmly anchored in the corporate strategy. The use of the latest construction IT and BIM technologies also makes an important contribution.
Promote BIM on construction sites
Building Information Modeling (BIM) is no longer limited to building construction: Consistently integrated building processes - from preliminary planning through implementation to use and maintenance - can also provide assistance to all those involved in infrastructure projects and provide more security, quality and flexibility in the implementation of the Bring in the construction task. In order to actively promote BIM processes in the areas of road and drainage construction at Max Bögl, Evelyn Roßner, who is experienced in the infrastructure sector, was entrusted with the task of actively implementing this consistent thinking as a BIM coordinator in road and civil engineering projects. “Three-dimensional models form the basis for the use of BIM on construction sites,” explains the expert. "They not only bring many advantages over the entire planning and construction process, but also suddenly make the previously impossible possible," Evelyn Roßner continues.
RIB iTWO civil and iTWO 5D
for drainage measures
On behalf of the Autobahn Directorate North Bavaria, the company renewed the concrete roadway and rehabilitated the drainage on an approximately ten-kilometer-long section of the A7 motorway between the Gollhofen and Uffenheim junctions. For this project, the functionalities of the RIB software iTWO civil for pipeline construction were used for the first time in conjunction with the corporate solution RIB iTWO 5D. The drainage-specific features of the software were designed for the requirements of such measures. The basis is formed by solids in the model, which are automatically provided with special attributes for cost determination and construction accounting. Depth levels are taken into account here. In pipeline construction - depending on the depth - for example for backfilling or lengths of a pipe, different cost approaches arise. The solid bodies for the model approach are given corresponding attributes. The height of a manhole ring or the diameter and the material of a special pipe can be freely or generically assigned attributes of a drainage project.
Over a period of around nine months, the company built, among other things, 20 precast concrete shafts, 115 pre-fabricated plastic shafts, around 830 meters of partial drainage pipe plus a total of around 5,500 meters of multi-purpose pipes and around 300 meters of reinforced concrete pipes. The partial drainage pipe and the multi-purpose pipes were installed as a longitudinal drainage under the basin and the reinforced concrete pipes were constructed as road crossings for the drainage of the median drainage and as an outlet. The client, who also works with the solutions from RIB Software, provided the inventory information in ISYBAU format. At Max Bögl, billing for the measure is carried out for the first time with the extended RIB software program and was completed in a period of around two weeks. Evelyn Roßner estimates that billing of this type of measure will be possible in an even shorter time, as soon as all members of the team know the functionalities well and are appropriately familiar with the BIM program. Once the billing has been completed, the new data on the street / sewer inventory is again transferred to the client in ISYBAU format, so that all extensions and changes to the drainage system after the renovation are available to him without any gaps.
Billing of depth levels made easy
“The depth levels presented a particular challenge,” explains the BIM coordinator. “The client asked us to graduate between one, 1.75 and three meters in depth. That is practically impossible to account for by hand, ”the expert knows. An exact height plan would be required for this in order to be able to determine the exact height of the subgrade at which drainage stations. "The workload would be immense and therefore the time required," she adds. "No problem, however, with the iTWO civil solution, because the subgrade is known here and the program automatically calculates all the necessary heights and depths."
Advantages of a model-based way of working
A clear change when working with BIM models in road or pipeline construction is above all the initially higher effort at the beginning of a construction project. This is the experience of the expert and the Neumarkt construction company. Because numerous work processes are shifted to the calculation or the project preparation phase: From a fuzzy model of the calculation phase, a clear model emerges from project preparation to execution, which is continuously and seamlessly equipped with information and further completed. In this early project phase, many aspects are prepared that can, however, make the tasks that arise in later cycles immensely easier - for everyone involved. In pipeline construction, for example, the target height for the manholes to be installed is retained in full until the end of the project. Even if there are changes in the course of the project, the RIB program iTWO civil calculates these in the overall process, reports all adjustments and makes them accessible to everyone on the construction site and in the offices for whom they are relevant. "If we work consistently in a model-oriented manner, then finished solid bodies always flow into all subsequent processes of a building task," says Evelyn Roßner. "That optimizes all other tasks for accountants and site managers alike."
Construction management and construction accounting benefit equally
Ms. Roßner remembers that in the past site managers usually determined all angles between individual lines by hand. A Sisyphus work. The data, which is very precise thanks to the BIM method, is now available to the site manager and saves him a lot of work and therefore time.
On the billing side, due to the model-based approach, all the fundamentals that are relevant for construction billing are provided. In this way, ambiguities and uncertainties can all be ruled out, which, in the experience of Max Bögl, is essential for building construction based on partnership.
Targeted production and delivery of prefabricated parts
For the construction company Max Bögl it is also conceivable that in the future prefabricated components for drainage, such as manhole rings or pipe sections, will automatically go into production according to the construction schedule and be delivered to the construction site on time at the planned installation time. This also has the advantage that there is no longer any need for intermediate storage.
“Model-oriented work is finding its way into our corporate strategy in all areas, as we clearly recognize the advantages and are already benefiting from many. We want to further intensify this approach in the future. We are supported in particular by the RIB software programs, ”summarizes the BIM coordinator and billing expert for infrastructure construction.
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