MONITORING PORE WATER PRESSURE

26/05/2021

Monitoring of underground water level. Serving the calculation of the ground load at the bottom of the foundation, checking the lowering of the water level during the pumping and lowering of the basement, etc.

GEOTECHNICAL OBSERVATION - MONITORING THE PRESSURE OF WATER PRESSURE

1. Standards and documents for monitoring pore water pressure

Approved construction design documents (general floor plan, design drawings of foundation system, column grid, basement beams...)

Geotechnical documents for regional and main works.

ASTM D5092 – Installation and monitoring of groundwater levels by monitoring wells.

Vietnam Standard 8869:2011 “Process for measuring pore water pressure in soil”.

2. Purpose of pore water pressure monitoring for underground construction

Pore water pressure monitoring (Piezometer) is the process of monitoring the change of pore water pressure during the construction process to warn of possible risks due to increased pore water pressure causing a decrease in strength. soil level.

Reference parameters to investigate the cause when there is a problem with the diaphragm wall.

The change in excess pore water pressure can assess the consolidation process of the ground under the foundation under the effect of loads.

Pore water pressure monitoring device
STT	Device name	Unit	Amount	Origin/ manufacturer	Uses
first	Sensor GK 4500	The	06	Geokon/ USA	Measure water pressure
2	Machine Model GK-405 Vibrating Wire Readout	The	01	Geokon/ USA	Read and write numbers