They will use radar to scan waste ground near the Portuguese apartment where she vanished in 2007.
UK sniffer dogs are also expected to join an operation set to last up to six days in the Algarve resort of Praia da Luz.
They are said to be focussing on three sites next to the Ocean Club where Madeleine, (left) then three, and her parents Kate, 46, and Gerry, 45, (right) were staying. The start date claim comes less than a week after Scotland Yard chiefs said the probe would soon enter a “substantial” new phase.
Met Police are also expected to include interviews with eight new suspects. Several are understood to be former employees of the Ocean Club.
The Yard has not ruled out the possibility Madeleine is still alive.
Praia da Luz parish council leader Victor Mata has attacked the police excavation plans.
He told a Portuguese paper soon after the first reports of the dig plans emerged: “It’s bad for tourism.
“It beggars belief they’re preparing to open up holes here a month before summer.”