How?
The work is undertaken by use of hydraulic jacking equipment to transfer the load from the existing column into the replacement structure. Rather than introduce a separate system of temporary works we try to introduce the new permanent support structure at an early stage and transfer the load into it before removing the original column. This minimises the possibility of movement occurring. A preferred method is to use a flat jack inflated with oil during the transfer of load and then to transform the oil with resin or cementitious grout once the transfer of load is complete.
Why?
Column replacement usually involves a change of use in a building in some form. This can be to make more space, for example, to create one large room from two adjacent smaller ones. Sometimes a column is required to be replaced because it is in the way, for example difficulties in manoeuvrability within a car-park.
Where?
We have undertaken works within the basement of a heavily loaded building requiring a new piled foundation as well as the column replacement itself. Equally the directors have carried out work towards the top of a building to remove a section of steel column at the eighth floor level of a twelve storey building. The remaining section was hung from a new beam installed at roof level.
What?
Either RC or steel can be used depending on the application. For reasons of speed and economy we often place an RC foundation and surrounding structure whilst the new column itself is structural steelwork.
|
