The BGCL site team at Test Bed 80 procured the services of specialist temporary works designers HPBW to develop an inventive solution to address issues affecting the stability of the structure in its temporary state. The main part of the building comprises of double skin concrete walls. These walls are relatively slender and sit eccentrically on a narrow foundation below. The structure does not become fully self-supporting until the inner and outer roof structures are constructed.
Original temporary works proposals involved eight metre long raking props/ shoring being installed at 45 degrees to the building. Props were required every five metres along the external length of each wall. Considerable reinforced concrete foundations were required to transfer the loads into the ground. Internal ties were required to connect inner and outer walls. This proposal was extremely onerous on the contractor and was severely limiting due to the following reasons:
The solution: design and install temporary shear brackets every 900mm to provide restraint to inner walls, coupled with the installation of temporary ties every 1.5m between inner and outer walls, utilising tie holes, to restrain outer walls from inner. The advantages of this solution were:
The project continues to progress at a good rate in part thanks to this innovative and effective solution.
Entry submitted by Buckingham Group
The Scheme does not promote or endorse any products, goods or services. For more information, click here.