METHOD FOR FEEDING GROUT INTO GROUND BY MUTIPLE OVERLAPPED AND CONNECTED UNIT PUMPS

摘要

PROBLEM TO BE SOLVED: To efficiently feed grout and let it penetrate at a low pressure in accordance with the design and perform highly reliable feeding of grout without causing its deviation in a process on the halfway of feeding when improving the ground having a large area by feeding the grout having a long gel time and letting it penetrate at a low pressure. SOLUTION: When many holes are digged in the whole region of the ground 15 in a predetermined area in the ground 15, and a flexible feeding pipe having a small diameter and made of synthetic resin is provided around a core pipe having high rigidity in the digged hole to supply and feed grout 14 into each feeding pipe under pressure, primary feeding is performed from the core pipe before or after feeding or penetration test water is fed into the core pipe under pressure to conduct a penetration test before or after secondary feeding in order to perform an inspection for confirming the effect by checking the presence or absence of deviation of grout to confirm the effect, and refeeding is performed as required to enable secure penetration feeding.