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Water Inflow Happening During Caisson Construction !
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A Little Wisdom Helps You Become Smarter !
In Case Of Water Inflow During Caisson Construction, The Following Measures Can Be Taken :
I. Analyze The Causes
First, determine the source of the water inflow, which may be groundwater, confined water, or infiltration of surface water. Understanding the water source situation helps to take targeted treatment measures !
II. Drainage measures
1. Increase Drainage Equipment
For example, increase the number and power of water pumps to drain the accumulated water in the well in time to ensure that the construction surface is not flooded. Appropriate types of water pumps, such as submersible pumps and centrifugal pumps, can be selected according to the amount of water inflow !
2. Optimize The Drainage System
Check and improve the drainage pipeline to ensure smooth drainage. Clean up debris and blockages in the drainage pipeline to prevent the drainage effect from being affected by pipeline blockages !
III. Water Stoppage Measures
1. Grouting For Water Stoppage
Use the grouting method to inject cement slurry, chemical slurry, etc. into the surrounding stratum of the water inflow area to block the groundwater passage. Grouting can be carried out by surface grouting or back-wall grouting inside the caisson !
2. Curtain For Water Stoppage
Set up a water-stop curtain around the caisson, such as deep mixing piles, high-pressure jet grouting piles, etc., to prevent groundwater from infiltrating into the caisson. The construction of the water-stop curtain needs to be reasonably designed according to geological conditions and engineering requirements !
IV. Adjust Construction Methods
1. Slow Down The Sinking Speed
In case of water inflow, appropriately slow down the sinking speed of the caisson to better observe and handle the water inflow problem. At the same time, slowing down the sinking speed can also reduce the disturbance to the surrounding stratum and reduce the possibility of water inflow !
2. Sink In Stages
Divide the sinking process of the caisson into several stages and check and handle the water inflow problem between each stage. This can gradually control the water inflow situation during the sinking process to ensure construction safety !
V. Strengthen Monitoring
1. Water Level Monitoring
Install water level monitoring equipment to monitor the change of the water level in the well in real time. Through water level monitoring, the changing trend of the water inflow problem can be found in time so that corresponding measures can be taken !
2. Stratum Deformation Monitoring
Monitor the deformation of the stratum around the caisson to understand the impact of the caisson sinking on the surrounding stratum. If excessive stratum deformation is found, it may lead to changes in the groundwater passage and cause water inflow problems, and the construction method needs to be adjusted in time !
Constructing four dewatering wells on the periphery can help solve the water inflow problem encountered during caisson construction to a certain extent, but it cannot completely guarantee the solution to all problems !
Advantages :
- Lowering The Groundwater Level Dewatering wells can extract the surrounding groundwater and lower the groundwater level, thereby reducing the water pressure around the caisson and reducing the possibility of water infiltrating into the caisson !
- Creating Conditions For Construction Keeping the caisson construction area in a relatively dry environment facilitates construction operations and improves construction efficiency and safety !
Limitations :
- The effect depends on geological conditions
If the geological conditions are complex, such as the existence of multiple aquifers and abundant groundwater recharge, relying only on four dewatering wells may not be able to completely control the groundwater level and there may still be water inflow !
- May cause ground subsidence :
Excessive extraction of groundwater may lead to ground subsidence around and have an impact on surrounding buildings and infrastructure !
In conclusion, constructing four dewatering wells on the periphery can be a measure to solve the water inflow problem in caisson construction. However, it usually needs to be combined with other methods such as water stoppage measures and adjustment of construction methods to ensure the smooth progress of construction through comprehensive consideration !
In Case Of Water Inflow During Caisson Construction, The Following Measures Can Be Taken :
I. Analyze The Causes
First, determine the source of the water inflow, which may be groundwater, confined water, or infiltration of surface water. Understanding the water source situation helps to take targeted treatment measures !
II. Drainage measures
1. Increase Drainage Equipment
For example, increase the number and power of water pumps to drain the accumulated water in the well in time to ensure that the construction surface is not flooded. Appropriate types of water pumps, such as submersible pumps and centrifugal pumps, can be selected according to the amount of water inflow !
2. Optimize The Drainage System
Check and improve the drainage pipeline to ensure smooth drainage. Clean up debris and blockages in the drainage pipeline to prevent the drainage effect from being affected by pipeline blockages !
III. Water Stoppage Measures
1. Grouting For Water Stoppage
Use the grouting method to inject cement slurry, chemical slurry, etc. into the surrounding stratum of the water inflow area to block the groundwater passage. Grouting can be carried out by surface grouting or back-wall grouting inside the caisson !
2. Curtain For Water Stoppage
Set up a water-stop curtain around the caisson, such as deep mixing piles, high-pressure jet grouting piles, etc., to prevent groundwater from infiltrating into the caisson. The construction of the water-stop curtain needs to be reasonably designed according to geological conditions and engineering requirements !
IV. Adjust Construction Methods
1. Slow Down The Sinking Speed
In case of water inflow, appropriately slow down the sinking speed of the caisson to better observe and handle the water inflow problem. At the same time, slowing down the sinking speed can also reduce the disturbance to the surrounding stratum and reduce the possibility of water inflow !
2. Sink In Stages
Divide the sinking process of the caisson into several stages and check and handle the water inflow problem between each stage. This can gradually control the water inflow situation during the sinking process to ensure construction safety !
V. Strengthen Monitoring
1. Water Level Monitoring
Install water level monitoring equipment to monitor the change of the water level in the well in real time. Through water level monitoring, the changing trend of the water inflow problem can be found in time so that corresponding measures can be taken !
2. Stratum Deformation Monitoring
Monitor the deformation of the stratum around the caisson to understand the impact of the caisson sinking on the surrounding stratum. If excessive stratum deformation is found, it may lead to changes in the groundwater passage and cause water inflow problems, and the construction method needs to be adjusted in time !
Constructing four dewatering wells on the periphery can help solve the water inflow problem encountered during caisson construction to a certain extent, but it cannot completely guarantee the solution to all problems !
Advantages :
- Lowering The Groundwater Level Dewatering wells can extract the surrounding groundwater and lower the groundwater level, thereby reducing the water pressure around the caisson and reducing the possibility of water infiltrating into the caisson !
- Creating Conditions For Construction Keeping the caisson construction area in a relatively dry environment facilitates construction operations and improves construction efficiency and safety !
Limitations :
- The effect depends on geological conditions
If the geological conditions are complex, such as the existence of multiple aquifers and abundant groundwater recharge, relying only on four dewatering wells may not be able to completely control the groundwater level and there may still be water inflow !
- May cause ground subsidence :
Excessive extraction of groundwater may lead to ground subsidence around and have an impact on surrounding buildings and infrastructure !
In conclusion, constructing four dewatering wells on the periphery can be a measure to solve the water inflow problem in caisson construction. However, it usually needs to be combined with other methods such as water stoppage measures and adjustment of construction methods to ensure the smooth progress of construction through comprehensive consideration !
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