Description
- During tunnel construction, the absolute settlement of the tunnel crown and each cross-sectional point is measured to assess the equilibrium and displacement convergence of the tunnel cross-section, as well as to understand the behavior of the surrounding ground and estimate the range of the loosened zone in adjacent soil.
- These measurements serve as fundamental data for evaluating construction stability, confirming the effectiveness of support systems, reviewing subsequent construction processes, and determining the appropriate timing for face closure.
Composition & Characteristic
▣ Components
① Reflective sheet
② Fixed target
③ Fixing pin
▣ Features
- Targets used for optical surveying are generally divided into two types: triple prisms and refractive-type targets fitted with high-intensity reflective sheets.
- Although refractive-type targets offer lower displacement-measurement accuracy compared to triple prisms and have shorter measurement range, they allow two-dimensional measurements.
Specification
| Model Name | SJ-1400 (Standard) |
SJ-1401 (Round) |
SJ-1403 (Square) |
SJ-1404 (Square) |
|---|---|---|---|---|
| Accuracy | Range: ±0.5°, Meter: 1.2mm | |||
| Installation Position |
Can be placed in any direction | |||
| Sensor Head Dimensions |
Ø55mm | Ø55mm | 40×45mm | 35×40mm |
| Dimensions | 98×114×30mm | H = 72mm Ø = 60~80mm |
40×60×15mm | 40×60×20mm |
| Weight | 0.1kg | 0.2kg | 0.06kg | 0.05kg |
| Material | ABS Resin | Steel | Aluminum Alloy | Aluminum Alloy |
| Specification | 0.3m | 0.5m |
|---|---|---|
| Dimensions | 300 × 15mm | 500 × 15mm |
| Weight | 0.3kg | 0.5kg |
| Material | Steel | |
This product is subject to change without prior notice to improve its quality.