33 The Research Fund of the Fachhochschule Frankfurt am Main sponsored the presented joint research project in 2005 and 2006. The co-operation partners are the external building company BAUER, Schrobenhausen (Germany), department of anchoring and the Geotechnical group of Department 1, Fachhochschule Frankfurt am Main. The company Bauer, Schrobenhausen is one of the most experienced companies in constructing excavation pits. In practical work they are often confronted with the problem if the chosen tools and the chosen equipment under the presented conditions and under a chosen timetable can realize the designed construction. The construction firm, here: Bauer, has often tried to explain the chosen way to the building owner, architect, structural engineer or other partner on the project by using drafts and charts. The final design documents are the basis for discussion. Apart from this the surrounding conditions and the size of the chosen equipment and procedure are additional information, which have to be analyzed and presented on the drafts and chart. For this purpose commercial tools have not been developed yet. The Department 1 of Fachhochschule Frankfurt joins the key aspects of activities of architecture, civil-, structural engineering and Geomatik and proposed therefore to use architectural tools in order to create a three-dimensional design library for geotechnical and management purposes. As a basis the work drawings of the equipment for anchoring work were used and implemented into the three dimensional design of really existing building site examples. The presented pictures show the drilling implement and the small excavator that are necessarily used to construct wedge yoke anchors during actual commercial support work. The additional pictures show the design of three existing locations. One location is situated on the site “Schleuse Lauenburg”, that is the new construction of a sluice near by the city of Lauenburg. Presented is the design of the circular sheet pile wall, that is the excavation pit of the new sluice chamber including the design of the anchors and including the chosen sheet pile locks at one corner of the pit. Another location is situated on the campus site of Fachhochschule Frankfurt am Main during construction of the new main building in 2005. As a part of the chosen support work a horizontal timber wall (Trägerbohlverbau) was designed and constructed. The design includes all details up to the details of the anchor heads and the surrounding, already existing, building. The last of the three locations is the building pit of the north entrance area of the new Gotthard tunnel project that is still under construction. Bauer was responsible for the anchor work of the designed retaining wall consisting of a bored diaphragm and of five layers of anchors. Here, the surrounding morphology, the retaining wall, the anchors, the subsoil condition (erratic rocks) and the equipment was designed and jointed. The main practical challenge of the contractor was to compete with the existing erratic rocks during anchoring. By using the presented Allplan design and in addition designing a movie, which leads a virtual visitor across the site up into the borehole of one anchor, the problem for using the equipment (different rock hardness) was obvious even for non-experts. All of these locations were designed using Allplan Architecture and final design documents of each project and of the equipment given by the co-operation partner. All drawings are naturally true to scale. As a further development the self-moving of the equipment to construct anchors has been begun to be designed by using Cinema4D. First movie sequences were developed successfully. Results will be presented later on and research work will be continued. Excavation pits - digitalized work process The construction of a building or the excavation of a pit near adjacent properties or under blind bend subsoil conditions is one of the most difficult challenges in present engineering work. Considering all separate interests (given by the building owner, the architect, the structural engineer and the neighbours), the construction firm has to present practical solutions by using three dimensional pictures of the procedures. So, using recent practical examples and final design documents given by the co-operation partner Bauer Spezialtiefbau, Schrobenhausen (Germany) a visualisation of the used equipment and the surrounding geometrical and geotechnical conditions were designed by using Allplan Architecture and Cinema4D to emphasize the special conditions and the problems on the chosen sites. Digitalisierung von Arbeitsschritten im Spezialtiefbau
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