Original Paper(Vol.59 No.1 pp.74-77)

Experimental Study on Impermeable Properties of H-Jointed SPSPs with H-H Joints under Soil Coexistence

Shinya INAZUMI, Makoto KIMURA, Takuzo KUZU and Tadashi WAKATSUKI

Abstract:This paper shows impermeable properties of H-jointed steel pipe sheet piles (SPSPs) with H-H joints under soil coexistence on impermeable walls used in coastal landfills. The authors have developed a number of technologies such as developing the H-jointed SPSPs and H-H joints for SPSP joint sections aimed at improving performance and widening application areas of SPSPs. Equivalent hydraulic conductivity of the H-jointed SPSPs with H-H joints under several soil coexistences was evaluated by experimental studies and it was clarified experimentally that H-jointed SPSPs with H-H joints can demonstrate the equivalent hydraulic conductivity of the 1~10-8 cm/s order. This is because the coexistence soil particles are covered by the swelling of swellable waterproof materials inside the H-H joints.

Key Words:Coastal landfill, H-H joint, H-jointed SPSP, Hydraulic conductivity, Soil coexistence, Swellable waterproof material