Dewatering Well Working Method
Tags: dewateringsystem, dwateringpumps, submersible
Published: 2021-07-13 10:14:35

Temporary or Preparatory Work
Temporary work or preparatory work that will be carried out by our Party is to carry out coordination work as well as mobilization and demobilization first so that the dewatering work process can then be carried out.
Work Chain
1. Determination of Dewatering Well Points
a. Determine the dewatering well point. The dewatering well points are all within the excavated area. Determination of the point of the dewatering well will be determined by the surveyor team so that the location of the dewatering well is not in the position of the foundation or pile cap.

b. Dewatering Well Drilling.

c. Well Cassing Installation.

d. Pump Installation.

e. Piping Installation.

2. Piezometer Point Determination
Piezometer well points will be installed outside the excavation according to the needs in the field. Piezometer wells are also called soil structure monitoring wells around the project area/location. Piezometer well measurements are carried out every day.

3. Determination of Recharging Point
The recharging well points will be installed in the area around the building and residential areas adjacent to the project area. adjusted to field conditions, if needed in this case, recharging functions as a well called water inject recharged.

4. Pit and Channel Creation
Making pits and channels will be determined / proposed in the field meeting. In this case, pits and canals must be made to drain puddles that interfere with the excavated land/work area. In principle, channels and pits are useful for localizing puddles so as not to disturb/inundate the excavation work area. The construction of the channel will be made on the edge of the excavation area by the excavation contractor.

5. Monitoring of Dewatering Works
The Dewatering Team will also participate in excavation contractor work activities to remove water hoses and electrical cables that interfere with excavation work. The Dewatering Team carries out work activities, to help workers who carry out their activities in the excavated area.

6. Dewatering Well Closing Method
The dewatering closure method that we will do is as follows: :
Before carrying out the dewatering well closing method, the steps that must be prepared are:
Installation of pipes, flanges and waterstops
Install blockout
Dewatering Closure
The pump is lifted which is followed by cleaning the block out area

Inserting debris and concrete cylinders to the specified limit

Blockage of the water that comes out by using a mixture of cement and accelerator, in the following way:

SikaSet Accelerator mixture: Damdex: cement = 1:3 stir until smooth until it forms a paste

Stick and press the paste-shaped mixture into the hole where the water comes out

Hold for a while until the paste hardens so that the water does not come out again (clogged).

Finishing (last work)
After all the processes are complete, and the water doesn't really come out within 1×24 hours for 15 days, then the blind flange block will be installed so that the basement floor is flat again.
Installation
1. Deepwell pump installation
2. Automatic Panel Mounting Installation
3. Power Cable Installation
4. Drain Hose Installation Installation Pemasangan
Source :https://tirtabuminaga.co.id/