TGP72 Tunnel Geological Prediction Instrument
Product Offering
TGP Tunnel Geological Prediction System
TGP 隧道地质超前预报系统
A tunnel geological prediction system using seismic reflection and diffraction waves to forecast adverse geological conditions and geological hazards ahead of the tunnel face.
基于地震反射波和绕射波的隧道地质超前预报系统，用于预测掌子面前方不良地质条件和地质灾害。
Supplied by Beijing Research Institute of Hydropower and Geophysical Surveying
Overview
Product overview
The TGP Tunnel Geological Prediction System is a specialized advanced prediction system independently developed by the Beijing Research Institute of Hydropower and Geophysical Surveying. It uses seismic reflection and diffraction waves to forecast adverse geological conditions and geological hazards ahead of tunnel faces, supporting tunnel construction safety and information-based construction management.
The system can predict structural fracture zones, weak rock layers, karst development zones, lithologic contact zones and the engineering geological properties of tunnel surrounding rock. Its 3D geological interpretation processing system transforms geophysical exploration results into geological interpretations, including structural strike, dip direction and dip angle.
The TGP206 system adopts a “24-hole excitation with source-receiver interchange” acquisition method and includes the instrument main unit, receiving probes, trigger extension cables, extension rods and probe positioners. It supports various seismic sources, including explosives, sledgehammers and mechanical sources, and provides 2D and 3D processing functions for geological interpretation.
The TGP72 system adopts 72-channel wireless acquisition. A single blast can complete prediction data collection for one sidewall of the tunnel, reducing blasting operations and shortening the occupation time for prediction surveys. The system supports 4G, Wi-Fi and radio communication, wireless data transmission, wireless triggering synchronization and pneumatic coupling of receiving probes.
TGP 隧道地质超前预报系统是北京市水电物探研究所自主研发的专业隧道超前地质预报系统。该系统利用地震反射波和绕射波对隧道掌子面前方不良地质条件及地质病害进行预测，为隧道安全施工和信息化施工管理提供技术支持。
系统可预测构造破碎带、软弱岩层、岩溶发育带、岩性接触带以及隧道围岩工程地质性质。其三维地质解释处理系统可将物探结果转化为包含构造走向、倾向和倾角等内容的地质解释成果。
TGP206 系统采用“24 孔激发、收发互换”的采集方式，主要由仪器主机、接收探头、触发延长线、延长杆和探头定位器等组成。系统兼容炸药、大锤和机械震源等多种震源，并具备二维和三维处理功能，便于开展地质解释。
TGP72 系统采用 72 通道无线采集方式，单次爆破即可完成隧道一侧边墙的预报数据采集，可减少爆破作业并缩短预报占用施工现场的时间。系统支持 4G、Wi-Fi 和无线电通信，可实现地震波信号无线传输、无线触发同步记录和接收探头气动耦合。
Applications
Typical applications
- Highway tunnel geological prediction
- Railway tunnel geological prediction
- Urban rail transit tunnel construction
- Water conservancy and hydropower tunnels
- Underground engineering safety prediction
- Prediction of fault fracture zones, karst zones and weak rock layers
- 公路隧道地质超前预报
- 铁路隧道地质超前预报
- 城市轨道交通隧道施工
- 水利水电隧洞
- 地下工程施工安全预报
- 断层破碎带、岩溶区和软弱岩层预报
Features
Key product features
- Uses seismic reflection and diffraction waves for tunnel prediction
- Forecasts geological hazards 100–150 m ahead of the tunnel face
- Provides 3D geological interpretation and imaging
- Supports prediction of fracture zones, weak rock layers and karst zones
- TGP206 supports multi-source acquisition and 3D processing
- TGP72 supports 72-channel wireless acquisition and single-shot sidewall data collection
- 利用地震反射波和绕射波开展隧道超前预报
- 可预报掌子面前方 100–150 m 地质风险
- 支持三维地质解释和成像
- 可预测破碎带、软弱岩层和岩溶发育带
- TGP206 支持多震源采集和三维处理
- TGP72 支持 72 通道无线采集和单炮边墙数据采集
Technical Information
Technical parameters
- Prediction distance: typically 100–150 m ahead of the tunnel face
- Main geological targets: structural fracture zones, weak rock layers, karst development zones, lithologic contact zones and surrounding rock engineering properties
- TGP206 acquisition method: 24-hole excitation with source-receiver interchange
- TGP206 main components: instrument main unit, receiving probes, trigger extension cables, extension rods and probe positioners
- TGP206 receiving probe: three-component velocity-type probe with high sensitivity, high directivity and high-frequency broadband characteristics
- TGP206 coupling method: direct grease coupling with the rock mass
- TGP206 compatible sources: explosives, sledgehammers and mechanical sources
- TGP72 acquisition method: 72-channel wireless acquisition
- TGP72 main components: acquisition units, control instrument, receiving probes, wireless radio trigger and wireless base stations
- TGP72 communication: 4G, Wi-Fi and radio communication
- TGP72 receiving probe coupling: pneumatic coupling
- Processing functions: seismic migration, 2D prediction, 3D spatial imaging, geological interface interpretation and geological hazard prediction
Case 1：Yingbin Tunnel on the Sanya Ring Expressway.
- The TGP206 system was used for advanced geological prediction in the Yingbin Tunnel on the Sanya Ring Expressway. The prediction indicated a 37 m section of fractured, loose and severely weathered rock mass, and the surrounding rock classification was downgraded from Class III to Class V based on the prediction results and exposed geological conditions
Case 2：Huashishan Tunnel of Tianbao Expressway.
- The TGP206 system was used to predict the F1 fault fracture zone in the Huashishan Tunnel of Tianbao Expressway. The results indicated a large-scale structural zone with poor rock mass integrity, fractured and loose rock, strongly weathered and argillaceous materials, and local sections requiring construction and reinforcement consideration according to Class V surrounding rock conditions
技术参数
- 预报距离：通常为掌子面前方 100–150 m。
- 主要地质目标：构造破碎带、软弱岩层、岩溶发育带、岩性接触带及围岩工程地质性质。
- TGP206 采集方式：24 孔激发、收发互换。
- TGP206 主要组成：仪器主机、接收探头、触发延长线、延长杆和探头定位器。
- TGP206 接收探头：三分量速度型探头，具有高灵敏度、高指向性和高频宽带特性。
- TGP206 耦合方式：与岩体直接黄油耦合。
- TGP206 兼容震源：炸药、大锤和机械震源。
- TGP72 采集方式：72 通道无线采集。
- TGP72 主要组成：采集单元、控制仪、接收探头、无线电触发器和无线基站。
- TGP72 通信方式：4G、Wi-Fi 和无线电通信。
- TGP72 接收探头耦合方式：气动耦合。
- 处理功能：地震偏移、二维预报、三维空间成像、地质界面解释和地质灾害预测。
案例1：三亚绕城高速迎宾隧道。
- TGP206 系统应用于三亚绕城高速迎宾隧道超前地质预报。预报结果显示，桩号 738 至 701 范围内约 37 m 区段岩体破碎松散、风化严重，并结合已揭露地质条件将围岩级别由 III 级调整为 V 级。
案例2：天宝高速花石山隧道。
- TGP206 系统应用于天宝高速花石山隧道 F1 断层破碎带预报。结果显示该断层带规模较大、岩体完整性差、破碎松散，并存在强风化及泥质化现象，局部区段施工与支护设计宜按 V 级围岩条件考虑。