283757893275

Ground Stability, Foundations and Substructures 155
Insulation inserted below screed to
reduce cold bridge
Ring beam. Pile reinforcement tied into
reinforced concrete ring beam
Reinforced structural concrete
basement walls
Wall may be formed using diaphragm
wall methods, interlocking, secant or
contiguous piles
Ground anchors using either screw
mechanical fixing or grout-based
anchors can be inserted to increase
lateral stability
The wall is constructed in the ground
before the soil is excavated for the
basement
The structural concrete wall provides
some resistance to water; however, any
water which penetrates is dealt with by
the drained cavity system or internal
tanking
Figure 3.74 Secant, interlocking and contiguous piles. Section through an anchored
bored pile, which, subject to spacing, can be used to form secant, interlocking and contiguous
retaining walls.