Dewatering Solutions
Well-Point Systems
Jawharat Al-Khat Contracting Est.(JKC) provides Well-Point dewatering systems; it is the most versatile form of lowering water levels in excavations, creating a dry and stable working environment.
Well-Point systems are used to lower groundwater levels to provide stable working conditions in excavations and are particularly suited to dewatering for shallow foundations and trench works. This method is capable of dealing with a wide variety of ground conditions, particularly suited to non-cohesive soils.
A Well-Point system consists of a closely spaced series of small-diameter shallow wells. The Well Points are connected to a common header main and are pumped with a high efficiency vacuum dewatering pump.
The well point system is applicable and suitable for many types of civil works such as:
- All Kinds of Excavations
- Excavations for basements and foundations of Buildings
- Foundations of Bridges & Underground tanks
- Laying of deep sewer lines
- Excavations and lining works for canals and channels etc.
- Tunnel work
- Trench Excavation
- Thrust Boring Pit.
- Sub-ways (Tube Railway etc.)
- Reclamation of land
- Water supply
- Anchor Block Excavation
Deep Well System
A deep well system consists of an array of bored wells pumped by submersible pumps.
The wells act in concert the interaction between the cones of drawdown created by each well result in groundwater lowering over a wide area.
These Deep Well System is applicable for the following:
- Deep excavation more than 12m
- Wide Are Excavation
- Foundation Pit
- Long Duration of Construction
Our Design of Dewatering and pressure relief or groundwater control system are analyzed by experienced engineer and complex solution solved by JKC’s Dewatering software.
Soil Improvement
Stone columns and Vibro techniques provide a foundation solution to improve a wide range of weak natural soils or land reclamation projects. The range of application is very wide. Vibro flotation and stone columns provide an economic foundation support for different applications.
- Industrial buildings
- Oil and gas facilities
- Infrastructures
- Airports
- Railways
- Logistic facilities and platforms
- Foundations for silos
- Foundations for storage tanks
- Commercial and residential buildings
Vibroflotation
It is a Specialist Deep Foundation Technique used for Ground improvement to considerable depth, up to 20 meters. It uses a probe called Vibro-flot (which could be powered electrically or hydraulically) to strengthen the soil by deep compaction to make the soil suitable to support proposed imposed load.
It involves the introduction of backfill granular material (Sand or Granite) to form Stone columns interlocking with surrounding soil. Treatment is to provide adequate bearing capacity; restrict total and differential settlements to acceptable magnitudes under the proposed loading and provide acceptable long-term performance of the treated ground.
Type of Vibroflotation Method
- Vibro Compaction method
- Vibro Replacement method (Wet top feed)
- Vibro Displacement method (Dry method)
Vibro-Compaction
It is the densification of granular soil. Natural deposit as well as artificially reclaimed sand can be compacted to achieve desired bearing capacity and minimal settlement. This is used for purely sandy soil of loose constituent.
Vibro-Replacement
This method involved the partial replacement of poor soil material, by flushing out the weak soil with Water/Air Jet and replacing with granular material. This is installation of stone column (made up of granite, or lime stone). This can be used in various soil type that includes Clay (soft, firm, stiff), lateritic Soil, Sandy Clay (of various constituent) and Peaty Soil.
Vibro-Displacement
This method is used where the environment plays a critical role in project. It can be either top or bottom feed. Little or no water is used in the construction. The vibro-flot is inserted in to soil and the soil is displaced laterally as the stone column is being formed and compacted.
