Pipe Proofing
Pipe Proofing (Pipe Roofing Umbrella System)
The Pipe Proofing (Pipe Roofing Umbrella Arch) System is an advanced geotechnical pre-support solution designed to stabilize tunnel roofs, portals, and deep cavern excavations before excavation. Heavy-wall structural steel casing pipes (J80/M80 grade) are installed ahead of the tunnel face in an umbrella configuration, transferring overburden loads longitudinally to prevent crown collapse and surface subsidence.
TECHNICAL DATA & SPECIFICATIONS
Certified engineering tolerances, metallurgical grades, and load metrics for heavy geotechnical installations.
Pipe Proofing (Pipe Roofing Umbrella System) — Technical Data Sheet
Quality Assurance Standard: ISO 10208 / EN 14199
| # | Technical Metric | Certified Specification |
|---|---|---|
| 01 |
System Type
|
Umbrella Arch / Forepoling Pre-support |
| 02 |
Casing Steel Grade
|
J80/M80 Structural Alloy Steel (EN 10025 / DIN 17100 St 52-3) |
| 03 |
Yield Strength (Min)
|
355 N/mm² |
| 04 |
Tensile Strength
|
490 – 630 N/mm² |
| 05 |
Elongation (Min)
|
22% |
| 06 |
Standard Pipe Diameters
|
76.2 mm, 88.9 mm, 114.3 mm, 139.7 mm, 168.3 mm |
| 07 |
Standard Lengths
|
3m, 6m, 9m, 12m, 15m (Coupled) |
| 08 |
Connection Method
|
Precision Threaded Casing Couplers or Starter Pipe Butt Weld |
| 09 |
Drilling Compatibility
|
Concentric Symmetrix / Overburden Odex Tooling |
| 10 |
Application
|
Tunnel Portals, Fault Zone Excavation, Weak Overburden Stabilization |
The Pipe Proofing System provides paramount pre-support when driving tunnels through fault zones, unconsolidated slopes, and populated urban areas where ground settlement must be zero. By driving casing pipes ahead of the tunnel face, it establishes a load-bearing umbrella arch before rock excavation commences.
Steel Grade Mechanical Properties (Pipe Roofing Casing Pipes)
| EN 10025 Standard | DIN 17100 Equiv. | Yield Min (N/mm²) | Tensile Strength (N/mm²) | Elongation Min (%) | C Max | Mn Max | P Max | S Max | Si Max |
|---|---|---|---|---|---|---|---|---|---|
| J80/M80 | St 52-3 | 355 | 490 – 630 | 22 | 0.20% | 1.60% | 0.035% | 0.035% | 0.55% |
ENGINEERED FOR EXTREMES.
READY TO ASSIST.
Ground Floor, Plot, No 42 B, Street No. 5, Rajinder Nagar Industrial Area, Rajendra Nagar, Sahibabad, Ghaziabad, Uttar Pradesh 201007