The Patna Metro Rail Project has introduced a state-of-the-art mechanism to monitor the condition of buildings by implementing a suitable Instrumentation & Monitoring system and Real Time monitoring while carrying out tunnelling work.
More Details:
- DMRC is committed not only to provide hassle -free commuting to its riders but also to keep people’s safety first as its top priority during the ongoing construction work. For which several measures are being taken to put people at ease of their apprehensions regarding tunnel process staying in nearby areas where tunnelling work is in progress.
- Measures & Monitoring system used during the tunnelling work:
What is Bore Tunnelling Electrical Ahead Monitoring (BEAM) system:
- The Bore Tunnelling Electrical Ahead Monitoring (BEAM) system, is a geophysical ground prediction technique especially designed for TBM operations. BEAM is a non-intrusive focused-electrical induced polarisation ground prediction technique, permanently operating while TBM advances.
- According to the Instrumentation & Monitoring Plan of Underground stations and tunnel alignment, various instruments like Inclinometer (INC), Strain-Gauge(SG), Inclinometer-cum-Extensometer(I/E), Vibrating Wire Piezometer (VPZ), Multi Point Borehole Extensometer (MPBX), Convergence Point (CP), Ground Settlement Marker (GSM), Pavement Settlement Marker (PSM) to be installed in the alignment and Building Settlement Marker (BSM), Tilt Plate (TP), Crack Metres (CM), 3D Bi-reflex Targets (BRT) etc. have been installed on concerned buildings falling in the alignment.
- Regular monitoring during TBM tunnelling is being done. Currently, the tunnelling drive is in progress in the Moin Ul Haq underground metro station which is tunnelling towards Patna University tunnel stretch.
- It is to be noted that, there are innumerable buildings which are centuries-old, and some are not in very good condition. The conditions of these structures are continuously being monitored as the tunnelling drive is progressing from Moin Ul Haq towards Patna University and PMCH. Utmost care is taken to ensure that tunnelling work does not affect any of the existing buildings in surrounding areas.
- Since Patna is one of the oldest cities, there are a number of structures and buildings falling in the alignment which are very old in age and of historical importance.
- Based on these factors the Building Condition Survey was conducted in the underground metro alignment and each building/structure falling in the underground metro station alignment has been listed based on present condition of the building, severity etc.
- This measure is taken for round the clock monitoring to ensure that there is no settlement of land anywhere or any damage is done to the structures above.
- These measures help build the confidence of the people staying in these areas that Metro is not only going to change the face of local transportation but it is also not compromising with the safety of people and buildings.
Source: Patna Metro- Press Release | Image Credit: Patna Metro
