What Is Slurry Wall Construction? | Slurry Wall Construction Process

What Is Slurry Wall Construction

What Is Slurry Wall Construction?

Slurry wall construction is a technique used by civil engineers for building walls in those areas which are near rivers or oceans and those places where the level of groundwater is high.

In slurry wall construction, concrete is reinforced to increase the strength of the wall. Mostly, this type of wall is used in making pillars of flyover bridges, bridges on rivers, tunnels, and in making foundations of buildings where the groundwater level is high.

This article will guide you to understand how the slurry walls are used and the process of constructing the slurry walls, and how much it will cost. This article will surely be helpful to people in getting knowledge about the construction of slurry walls.

Mostly slurry wall construction is preferred in permanent structures which are made for long time use. This technique is very useful for long-lasting structures as this is the best technique for the prevention of soil excursions.

Purpose of Slurry Wall Construction:

There Are Various Purposes for Which Slurry Wall Construction Is Done, Which Are as Follows:

  1. Slurry walls give strength to hold structure for a long time.
  2. Slurry walls give a barrier to the high flow of water and other liquids.
  3. The slurry wall’s main purpose is to give a deeper grip on tunnels and bridges.
  4. Another purpose of this wall is to give structure long age and make it strong.
  5. The slurry wall construction technique is a powerful construction technique used by engineers for heavy structures.
  6. Slurry walls’ purpose is to give stability to the structure.

Slurry Wall Construction Process:

The Slurry Wall Construction Process Includes Four Steps Which Are as Follows:

  1. Excavation
  2. Slurry filling
  3. Placement of steel reinforcement
  4. Concreting

1. Excavation:

Excavation

Excavation is the process in which a place is dug deeper with the help of machinery. This is the first step of the process because it is the formation of a foundation for a structure that has to be made strong.

It is very necessary because it helps engineers to know about the level of groundwater and also helps them to decide the kind of material to be used in the project. Excavation is a prior process and leads to protecting heavy structures in various environmental conditions too.

We know that slurry walls are made to give support to tunnels support to bridges, and as there is water or liquid is present, it is necessary to give a strong base so that it can handle heavy structures.

2. Slurry Filling:

Slurry Filling

The filling of the slurry is the second step in the process of slurry wall construction. The bentonite and water mixture is used as slurry, and it is filled in the trench that is excavated to form the foundation.

The slurry filling is the most important part of this process because this slurry helps to fill the gaps in the trench, which results in a grip on the deeper side of the walls and prevents soil excursion.

This is very important to fill the slurry in a proper way, as this gives strength to the wall and makes them long-lasting. The slurry is a very strong mixture that gives a hard and stronghold to walls.

The slurry is used in these slurry walls, which are made to hold heavy structures and prevent the collapse of these structures. This is a very important step in the process of slurry wall construction and to be done properly.

3. Placement of Steel Reinforcement:

Placement of Steel Reinforcement

This is the third step in which steel rods in the trench. Steel reinforcement is very necessary because it is the process of giving structure, or we can say that structure formation by using steel rods.

These steel rods are the main thing in this process which holds slurry and also gives proper shape to the structure, and also strengthens the whole structure.

Steel rod fixing is a very important part of this process of constructing slurry walls and has to be taken keen focus while inserting them.

4. Concreting:

Concreting

This is the last step in the process of construction of slurry walls. When the slurry is filled in the trench, the next filling which comes in the process is the filling of concrete.

When this step is in processing at that time, it is very necessary to take care that the slurry mixture and concrete mixture cannot get mixed with each other. The whole structure is filled with concrete, and this filling of concrete in the structure is called concrete.

This is the whole process of constructing the slurry wall, which we discussed in detail above.

Application of Slurry Wall Construction:

The Various Applications of Slurry Wall Construction Are as Follows:

  1. Slurry walls are used in projects that need deep foundations and buildings or structures that are to be made on a long-term or permanent basis.
  2. Slurry wall construction is used in making tunnels so that they can handle the overall structure of the tunnel.
  3. Slurry walls are used in dams too. There they can control the flow of water because their strength is high, so they can control the flow.
  4. Slurry walls are used in the metro also because tunnels are made for the metro passing.
  5. Slurry walls are used in making bridges over the rivers and at those places where the groundwater level is high.

Limitations of Slurry Walls Construction:

There Are Also Some Limitations of Slurry Wall Construction That Are as Follows:

  • In the construction of slurry walls, heavy machinery is required to dig a trench, and good quality equipment is required so that work will go smoothly.
  • In making slurry walls, well-trained and skilled labor is required because it is technical work that is done technically by skilled people.
  • There are so many safety measures that are to be taken while constructing slurry walls.
  • High concentration is required while constructing slurry walls because it is very complicated work.
  • In the construction of slurry walls, the area required is to be large.
  • Slurry filling in slurry wall construction is the most crucial part, and if it is not done properly, then the chances of collapsing structure will be high.
  • Maintaining the mixture difference is very difficult because there are two types of filling done one is of slurry, and the second is of concrete.

Slurry Wall Construction Costs:

Slurry Wall Construction Costs

The cost of construction of slurry walls in India is based on bids, and the bid is around nine thousand to twelve thousand (9000-12000) per square foot. It is an average estimated cost which is shown above.

Advantages of Slurry Wall Construction:

Advantages of Slurry Wall Construction

The Various Advantages of Slurry Wall Construction Are as Follows:

  1. Costeffective: Slurry wall construction can be done at very low prices. The cost of constructing a slurry wall is very low, and the quality of the wall is good, so it is a cost-effective option.
  2. Long life: Slurry walls are very strong walls and hold the structure with a tight grip. Strong slurry gives strength to the slurry walls and makes them long-lasting.
  3. High productivity: The technique used by engineers of slurry walls gives longer stability to the structure, which results in high productivity.
  4. Best for areas nearby water sources: Slurry walls are very effective at those areas where the groundwater level is high and those areas too where the water level is high, and construction is to be done inside any water area or any liquid area such as a river, ocean, etc.
  5. Strong in nature: Slurry walls are strong in nature and provide a long-lasting structure that can be used for the long term or permanently.
  6. Ready to fight with natural disasters: Slurry walls are very strongly and deeply constructed so that they will form a strong foundation that is able to fight natural disasters like earthquakes, floods, etc.
  7. Less wastage of material: if the material is excavated in the construction of slurry walls, then it can be reused in making other slurry walls, so the wastage is very low in the construction of slurry walls.
  8. Easily availability of material: The material which is used in making slurry walls is very easily available in the market, so people don’t have to make much effort to find the material to be used in the construction of slurry walls.

Also Read: Type of Building Materials

Disadvantages of Slurry Wall Construction:

Disadvantages of Slurry Wall Construction

 There Are Also Some Disadvantages of Slurry Wall Construction That Are as Follows:

  1. Heavy machinery: In the construction of slurry walls, heavy machinery is required to cut soil or dig a deep trench for foundations.
  2. Skilled manpower: It is very necessary for people who are working in the construction of slurry walls to be highly skilled because it is technical work that is done by technical people if non-technical people are hired for this work, they will not be able to make walls.
  3. Area consumption: In the making of slurry walls the area which is consumed is very large as these walls are only made for heavy structures so a large area will be covered by them.
  4. Material impurities: In today’s era, it is very difficult to find pure material for related purposes. Sometimes poor quality material is sold by vendors, so it is very important to take an eye on every part of the construction process, whether it is related to work done by labor or the purchase of material.
  5. Designing: The design of slurry walls for the structure is very difficult and has to be done properly to get relevant results.
  6. Collapse: If the slurry is not filled properly or any other function cannot be performed according to the criteria, then it may be possible that the structure will collapse due to air gaps in the trench.
  7. Complicated structure: The structure of slurry wall construction is a bit complicated, so manpower has to put their full concentration into the construction of slurry walls.

Conclusion:

This is a detailed study about the construction of slurry walls in which we discussed the areas where it is used and the purpose of constructing slurry walls.

We also study the advantages, disadvantages,s and some limitations of slurry wall construction which will help the reader to understand the slurry wall construction in an easy manner.

Slurry wall construction is a cost-effective technique that is long-lasting in nature. The material which is used in the making of slurry walls is easily available in the market. Skilled manpower is the major requirement while constructing the slurry walls.

There are so many areas that are to be focused on while constructing slurry walls, such as proper filling of slurry in the trench, etc. So many safety measures should be followed in the construction of slurry walls.


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Frequently Asked Questions

What Is a Slurry Wall in Construction?

Slurry wall construction is a technique used by civil engineers for building walls in those areas which are near rivers or oceans and those places where the level of groundwater is high.

What Is Slurry Wall and How Is It Constructed?

Slurry wall construction is a technique used by civil engineers for building walls in those areas which are near rivers or oceans and those places where the level of groundwater is high. Trenches are dug into the panels for their production. An auxiliary fluid, usually a bentonite suspension, prevents the soil around the trench from entering.

What Is the Purpose of a Slurry Wall?

  1. Slurry walls give strength to hold structure for a long time.
  2. Slurry walls give a barrier to the high flow of water and other liquids.
  3. The slurry wall’s main purpose is to give a deeper grip on tunnels and bridges.

Are Slurry Walls Permanent?

In slurry wall construction, concrete is reinforced to increase the strength of the wall. Mostly, this type of wall is used in making pillars of flyover bridges, bridges on rivers, tunnels, and in making foundations of buildings where the groundwater level is high.

What Materials Are Used in Slurry Wall?

In slurry wall construction, concrete is reinforced to increase the strength of the wall. Mostly, this type of wall is used in making pillars of flyover bridges, bridges on rivers, tunnels, and in making foundations of buildings where the groundwater level is high.

Where Are Slurry Walls Used?

Slurry wall construction is used by civil engineers to build walls in areas near rivers or oceans and for areas where groundwater levels are high.

What Is a Slurry Wall Foundation?

Construction of slurry walls is the deep wall made of concrete, reinforced concrete, or binding agents in the building ground. They have a fixed or sealing function. Trenches are dug into the panels for their production. An auxiliary fluid, usually a bentonite suspension, prevents the soil around the trench from entering.

How Do You Install a Slurry Wall?

The Slurry Wall Construction Process Includes Four Steps Which Are as Follows:

  1. Excavation
  2. Slurry filling
  3. Placement of steel reinforcement
  4. Concreting

Slurry Wall Vs Retaining Wall

Diaphragm walls, aka slurry walls, are most often constructed using reinforced concrete. Sheet pile retaining walls are made of steel or sometimes vinyl sheet piles for both temporary and permanent structures. Anchored walls use rock, concrete, or sheet piles and are reinforced with cables for extra strength.

Slurry Wall Vs Diaphragm Wall

Slurry walls can be structural or non-structural, depending on the application. A Diaphragm Wall is a structural slurry wall that can provide earth retention and load-bearing capacity in addition to forming an impervious barrier to lateral groundwater migration.

Slurry Wall Construction

Slurry walls are deep wall structures made of concrete, reinforced concrete, or binding agents in the building ground. They have a static or sealing function. For their production, trenches are excavated in panels. A support fluid, usually bentonite suspension, prevents the soil around the trenches from caving in.

Slurry Wall Design

Slurry Wall Design
Slurry walls are non-structural subsurface groundwater barriers. These walls are constructed using the slurry trench method of construction, where a trench is excavated under a bentonite slurry and is “keyed” into the underlying bedrock.

Slurry Wall Excavation

Slurry walls are deep wall structures made of concrete, reinforced concrete, or binding agents in the building ground. They have a static or sealing function. For their production, trenches are excavated in panels. A support fluid, usually bentonite suspension, prevents the soil around the trenches from caving in.

Concrete Slurry Wall

A slurry wall is a civil engineering technique used to build reinforced concrete walls in areas of soft earth close to open water or with a high groundwater table. This technique is typically used to build diaphragm (water-blocking) walls surrounding tunnels and open cuts and to lay foundations.

Slurry Wall Installation

A slurry wall consists of several slurry wall panels installed next to each other. The excavation is either carried out with a slurry wall grab or a hydro mill.

Slurry Wall Shoring

deep wall structures made of concrete, reinforced concrete, or binding agents in the building ground. They have a static or sealing function. For their production, trenches are excavated in panels. A support fluid, usually bentonite suspension, prevents the soil around the trenches from caving in.

Slurry Wall Method

A slurry cut-off wall or slurry trench wall is typically excavated using a backhoe (or grab) while simultaneously pumping a hydrated cement bentonite mix into the trench to depths in excess of 25m. Once cured, the slurry cut-off wall provides a permanent low permeability barrier to groundwater and leachates.

Slurry Trench Method

Slurry – a polymer and water mixture – fills an excavated trench to prevent soil excursions. Reinforcement structures are then added, followed by concrete inserted with tremie tubes which displace the slurry. The slurry wall process causes no vibration and minimal noise, which is ideal for unstable soil conditions.

Slurry Wall Cost

The cost ranges from $5 – $7/ft2, not inclusive (Rumer et al., 1996). Cost varies depending on site conditions, type of slurry/backfill, depth, cleanup of spoils, and treatment of spoils.

Bentonite Slurry Wall Cost

Costs likely to be incurred in the design and installation of a standard soil-bentonite wall in soft to medium soil range from $540 to $750 per square meter.

Slurry Meaning in Construction

slurry, watery mixture, or suspension of insoluble matter. In the manufacture of portland cement, a mixture of raw materials with water is called a slurry. Cement may be piped as a slurry in building construction.

Slurry Wall Construction Sequence

1: Typical construction sequence of slurry walls : (A) Trenching under slurry, (B) End stop inserted (steel tube or other), (C) Reinforcement cage lowered into the slurry-filled trench, (D) Concreting by tremie pipes.

Slurry Walls Are Associated With

Slurry walls are associated with: Foundation bearing on clay. Settlement of a building after it is constructed is likely to be the greatest under which conditions? Conventional retaining walls.

Slurry Walls for Groundwater Control

Slurry walls are used as an engineering control to prevent groundwater and non-aqueous phase liquids (NAPL) migration and/or maintain separation between contaminated and uncontaminated groundwater regimes.

Tanking Slurry External Wall

Tanking slurry, or “cementitious tanking,” is a thick liquid coating that is applied to the masonry surface to create a waterproof barrier. It is essentially a type of cement fortified with polymers and other aggregates.

Slurry Wall Construction Process

Slurry walls are typically constructed by starting with a set of concrete guide walls, typically 1 meter (3 ft 3 in) deep and 0.5 meters (1 ft 8 in) thick. The guide walls are constructed near the ground surface to outline the desired slurry trench and to guide the excavation machinery.

Slurry Wall Foundation

A slurry wall is a civil engineering technique used to build reinforced concrete walls in areas of soft earth close to open water or with a high groundwater table. This technique is typically used to build diaphragm (water-blocking) walls surrounding tunnels and open cuts and to lay foundations.

Slurry Wall Advantages

SLURRY WALLS (STRUCTURAL)

  1. Provides strong watertight walls.
  2. Minimizes settlement of adjacent structures.
  3. Provides underpinning.
  4. Proven technology.

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