Patent ID: 6322294
Filing Date: 2001-11-27
Classification: E02D

Abstract:
A device for ejecting a ground improving grout into a ground through a vast number of ejecting points, said device comprising: a multi-cylinder pump comprising plural unit pumps, each unit pump being connected to an adjacent unit pump within said multi-cylinder pump, plural piston driving devices, wherein a plurality of said plural unit pumps are connected to each of said piston driving devices, each of said unit pumps includes a cylinder having a suction port for receiving the ground improving grout, a discharge port for expelling the ground improving grout and a piston rod, each said piston rod has a first end operatively connected to a respective one of the piston driving devices and a second end connected to a piston having a suction valve, whereby movements of said piston driving devices are transmitted to respective piston rods and respective pistons so that when unit pumps are driven by reciprocal movement of the driving system the grout is received in respective cylinders through their respective suction ports and discharged from the respective cylinders through their respective discharge ports at a discharge speed, a driving system driven by a single driving source, plural ejecting pipes for inserting into the ground, each said ejecting pipe having a discharge port and a storage tank for storing the ground improving grout, said storage tank being connected to each of the unit pumps in the multi-cylinder pump and the unit pumps being respectively connected to the plural ejecting pipes such that the ground improving grout in said storage tank can be transported by each of said unit pumps into each of said ejecting pipes and ejected into the ground from the discharge ports.