Sump Pumping and Overpumping Back to DewateringWhat is a Sump Pump? A sump pump is used when groundwater is allowed to flow in to the excavation, it's then collected in sumps and then pumped away. Sump pumping is one of the simplest forms of dewatering and can be very reliable in a variety of different
WJ Group Admin
August 19, 2015
Sump Pumping System
January 7, 2020
Technically challenging groundwater control projects are WJ’s forte, and one of the most successful of these projects were the wastewater treatment works in Ashford, Kent.
November 19, 2019
This week, we celebrated 5 years in our Kings Langley home! We’re proud of the progress we’ve made since our move, and would like to share some of our fondest memories.
Passive Relief Systems Back to DewateringIt is sometimes possible to control excess pore water pressures in a confined aquifer below the base of a proposed excavation by using passive relief well systems. The passive wells are drilled in the base of the excavation before the excavation has reached the piezometric level in the aquifer. As
Deepwell and Wellpoint Dewatering
April 14, 2016
‘A hole in one’ for WJ Groundwater who successfully drained a lagoon at the Montgomerie Golf Course in Dubai, UAE. We were set the challenge, by the main contractor Al Tayer Stocks and their subcontractor Ecocoast Contracting, to drain the golf course lagoon in one day so that a bund could be placed to allow
Construction Dewatering & Groundwater ControlWJ offer a complete construction dewatering and groundwater control service, ranging from design, installation, testing, monitoring and management of both temporary and permanent dewatering solutions to a wide range of customers. To learn more about the types of construction dewatering and groundwater control systems available, please select a service type below.
WJ Group Admin
June 26, 2019
Geotechnical Engineering for the Medway Tunnel and ApproachesWJ Whitepaper Publication Credentials AUTHORS: • Q. Leiper, BSc, MSc, CEng, FICE, FIHT, CGeol, FGS • T. Roberts, BSc, PhD, CEng, FICE, FGS, MC!WEM • D. Russell, BSc, MSc, PhD, CEng, MICE DATE: 2000 Abstract The design and construction of the Medway immersed tube tunnel and approach structures
Multi-Aquifer Pressure Release in East LondonWJ WhitepaperAbstract Two adjacent deep shafts in east London involved excavation to 30 m below standing groundwater level and required temporary control of pressures in the Lower Aquifer below the London Clay. Three distinct aquifer horizons were present comprising the Lambeth Group channel sands, Thanet Sand and Chalk. One of