The Shield Tunneling Backfill Grouting Monitoring System

It is mainly composed of the WGPR wireless ground penetrating radar (GPR) host system, arc-shaped rotating bracket + sprocket-driven scanning system, tunnel-specific base and mobile phone/tablet transmission terminal.

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Description:

Introduction

Application

TBM Tunnels: Dynamic monitoring of synchronous grouting quality. Metro/Railway Tunnels: Detection of voids behind segment linings and defects in insufficiently compacted grouting. Drill-and-Blast Method Tunnels: Acceptance of steel reinforcement distribution and concrete defects in secondary linings.

Advantage

Real-time Synchronous Monitoring: Scans concurrently with shield tunneling, overcoming the bottleneck of traditional lagging detection methods.
Precise Defect Identification: Detects grouting defects ≥10 cm with a positioning accuracy of ±3 cm.
High Anti-interference Capability: Features a specialized shielded antenna design to adapt to the strong electromagnetic environment of shield machines.
Multi-modal Deployment: Offers three detection modes—arc-shaped bracket, mobile cart, and handheld.
Intelligent Imaging System: Automatically generates dual-frequency 3D GPR display maps of grouting compactness.

Principle

Based on the principle of electromagnetic wave reflection:
A high-frequency antenna (100 MHz–2.5 GHz) emits pulsed waves.
Reflected signals from the grouting layer interface are received (due to differences in dielectric constants).
Professional software analyzes amplitude and time-frequency characteristics.
A dual-frequency 3D GPR visualization map of the grouting layer is generated.

Picture

Specification

Whole System

Rapid Setting Effect (RSE)

Segment Fixing Pile

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Contact information

Email：FUJIANZT@proton.me

Mobile/Whatsapp: +8615364002870

Room 1001, 10th Floor, Ziyang International, No. 139 North Changle Road, Jin'an District, Fuzhou City, Fujian Province

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