🧱 TBM Grouting (Two-Component A+B Sodium Silicate Grout, 130%-160% Void Volume)

TBM Annular Tail Void Grouting Calculator

Size two-component fast-setting tail void backfill grouting systems (Component A: cement/bentonite mortar + Component B: sodium silicate accelerator) injected through TBM tailskin ports: calculate theoretical annular gap volume ($V_{annular}$), apply over-injection factor ($130% ext{ to }160%$), verify rapid 10-second gelling to lock precast segments, and grouting contracting margins.

1. Project & Operating Inputs

TBM Tunnel Drive Length (Meters e.g. 2,500 Meter Tunnel Drive)

Annular Tail Gap Thickness (Inches e.g. 6.0" Annular Overcut Gap)

Customer Bid Price for Supplied & Injected Two-Component Grout ($ / m³)

Cementitious Mortar, Liquid Sodium Silicate, High-Pressure Pumping ($ / m³)

2. Financial Breakdown & Yield

TWO-COMPONENT TAIL GROUTING

Turnkey Tail Grout Supply Project Profit

Tunnel Chemical Grouting Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost