Technical advice on draining underground water for construction

In fact, the control of groundwater in construction works is often considered as ancillary work, so its importance has not been properly considered, so in many cases, serious incidents have occurred, causing damage. great for investors.

The behavior of soil and groundwater is extremely complex, a Solar System engineer  needs a deep understanding of the following issues:

► Groundwater and soil permeability

♦ Hydrogeological and hydrogeological conditions (Natural water cycle, geological components, and mechanical properties of rocks)

♦ Permeability of each soil type separately

♦ Properties of types of underground aquifers (subterranean aquifers, pressurized aquifers, water in cracks, etc.)

♦ Flow into the well (well radius of influence, zone of influence, interactions between wells)

♦ Interactions of groundwater with rivers, with additional rainfall, with retaining walls…

From that knowledge, engineers come up with methods to control groundwater for works.

♦ Selecting the appropriate method for  hydrogeological survey  for the project

♦ Selection  method of foundation pit drying  and control of surface water flow

♦ Selecting  a model  to analyze and calculate the underground water well system

In addition to ensuring the control of groundwater level to ensure the construction process. The geotechnical engineer must also evaluate the impact of the groundwater lowering pump on the surrounding elements, thereby taking measures to minimize the impact:

♦ Subsidence: due to lowering of groundwater level, due to underground erosion or pulling sand grains, due to increased effective stress

♦ Pumping for a long time increases the penetration between aquifers or the infiltration rate of surface water, the risk of groundwater contamination.