steel sheet pile with a wall and liquefaction deterrence function that has been subjected to liquefaction measures

摘要

PROBLEM TO BE SOLVED: To provide a wall body and a steel sheet pile capable of providing the ground, having a sand layer posing a risk of liquefaction on an occurrence of an earthquake but performing high water permeability in normal time, with a drainage function for liquefaction restoration without inhibiting the water permeability in the normal time.;SOLUTION: A planar resin material 13a configuring a drainage member is installed at an inside of a main body of a steel sheet pile 11 surrounded by a web 11a and flanges 11b thereof. The web 11a of the main body of the steel sheet pile 11 has many permeable holes 12 therein. Thus, an environmental-friendly steel sheet pile wall with a liquefaction countermeasure can be constructed in the ground by driving the steel sheet piles 11 with the drainage members into the ground while fitting left and right side joints 11c and 11d thereof. The permeable holes 12 in the web 11a of the main body of the steel sheet pile 11 enable underground water to smoothly flow without being interfered in normal time and thereby solving a problem with drawdown of a well or lowering of an underground water level behind the steel sheet pile wall. Also, the planar resin material 13a configuring the drainage member enables excess pore water pressure to be dispersed therethrough and thereby restraining liquefaction of the ground on an occurrence of an earthquake.;COPYRIGHT: (C)2012,JPO&INPIT