PA is formulated as a first fill grade tail sealant to be used on shielded tunnel boring machines(TBM).Together with the wire brushes, the sealant forms an impermeable barrier between the tail
shield of the TBM and the concrete segments to effectively seal off any ingress of water, soil and annulus grout/mortar back into the TBM invert.
HBW is a clay thickened lubricating grease for lips sealing system of TBM main bearing, which is based on mineral oil and polymers. The grease contains a selection of solids, fibers and graphite. It effectively protects the main bearing by preventing the ingress of soil, water or dust through the main bearing sealing.
TMT is an economical driving grade tai| sealant for shielded tunnel boring machines (TBM). TMT can be pumped into tail sealing chamber to prevent ingress of water, soils and annulus grout/mortar grout back into the TBM invert.
Waste soil improvement foam agent
IS SERIES product is a soil conditioning foam specifically developed to be used with tunnel boring machinery(TBM). It acts as a soil conditioner for various types of soil conditions ranging from wet to sandy clay types. The use of IS SERIESresults in the creation of temporary cohesion of the soil as well as a reduction in water permeability. IS SERIES gives the soil a cohesivecharacteristic
which is necessary for tunnel boring. The foam also provides an air cushion for the soil which compensates for the abrupt pressure changes at the tunnel face.