Slipforming poses a number of problems for engineering surveyors and despite close tolerance control systems, vertical displacements and axis rotations will always occur.
In recent years, Survey Operations have been developing systems to both minimise construction errors and to quantify post-construction problems which would have a direct impact on subsequent operations.
Frequently, we are called in at two or more stages per slipform to not only identify any overall service core problems, but to also assess tolerances on exposed openings and cast-in elements. This approach gives the earliest possible indication of complications and therefore minimises any programme delays which may arise.
On completion of a core, we will also complete an internal survey of each lift shaft to ensure tolerance compliance.
Using an approach we developed with one of the worlds largest lift manufacturers, we can define the maximum design operating rectangle for each shaft and provide internal setting-out information to assist installation.
Reassuringly, having worked on some of Britain's tallest buildings, Survey Operations name is associated with this type of surveying.