well point
Dewatering System
| Capacity | standard |
| Brand Name | Arihant Dewatering Systems |
| Application | For ground water Control during Moderate to Deep excavation across all type of construction projects in sandy/silty soil strata |
| Grade | Top Grade |
| Dimensions | Customers’ Requirement |
| Product Type | Wellpoint Dewatering Systems |
Well Point Dewatering Systems are essentially shallow wells which offer an economical and effective method of groundwater control for site dewatering.
Well points have the advantage of being able to be installed in most ground conditions as well as being easy to maintain. They are particularly suited to control of groundwater levels for shallow foundations and trench works in water-bearing granular soils.
When installed at close spacing at appropriate depths this will lead to satisfactory dewatering and ground stabilisation in stratified and fine graded soils, allowing for safe excavation of the working area on site.
They are effective for excavations up to four metres deep for a single stage system. For greater depths, if space permits, multi-stage systems can be installed to achieve even greater draw down.
Well points are installed using conventional jetting methods, which involve pumping water at high pressure supplied by a jetting pump. If self-jetting wellpoints are used, high pressure water is pumped directly down the riser.
Once installed, individual wellpoints are coupled by flexible swings to a horizontal vacuum header (collection) main. In turn, the header main is connected to a 200mm centrifugal or piston vacuum pump.
General Applications and Benefits: Wellpoint Dewatering Systems
1. Deep Excavations and Foundations
Primary Use: Lowering the groundwater table around excavations and foundation pits.
Purpose: Keeps subsoil dry to ensure safe excavation, shoring, and concrete placement below the natural water level.
Example: Ideal for basements, underpasses, and lift wells where water seepage would otherwise hinder construction.
2. Pipeline and Utility Trenching
Application: Dewatering during the laying of water mains, sewers, and underground utilities.
Purpose: Ensures dry trench conditions, prevents collapse of trench walls, and enables proper jointing and bedding.
3. Underpasses, Tunnels, and Metro Projects
Application: Groundwater control during construction of deep structures below grade level.
Purpose: Provides safe, stable excavation zones and prevents water ingress into working areas.
4. Bridge, Culvert, and Foundation Works
Application: Lowering groundwater around pier, abutment, or culvert foundations in permeable soils.
Purpose: Improves soil bearing capacity and prevents uplift pressure or base heaving during concreting.
5. Coastal and Riverfront Construction
Application: Temporary dewatering in areas influenced by tidal or seepage flow near water bodies.
Purpose: Facilitates construction of retaining walls, pump houses, and intake structures in wet conditions.
6. Combined Systems and Groundwater Management
Application: Works jointly with surface or deep well systems to achieve precise groundwater level control.
Purpose: Prevents surface inflow and stabilizes soil moisture for extended excavation works.
Typical Equipment Used
Wellpoint assemblies with filters and riser pipes
Header pipelines with quick couplings
Vacuum-assisted dewatering pumps ( ADS LHF series)
Jetting pumps for wellpoint installation(ADS BHF series)
Discharge hoses and accessories for easy site layout