地中構造物の液状化対策構造

Japanese Patent JP7359515

B2

To provide a liquefaction countermeasure structure of an underground structure which can suppress a dynamic water pressure in earthquake even when rigidity of a ground improvement wall is reduced by introducing a technical concept for achieving such a configuration as to intentionally lower a degree of fixation of the ground improvement wall to the underground structure and permit lift, and is excellent in economical efficiency and workability.SOLUTION: Ground improvement bodies 2 having small improvement diameters S are constructed along both sides in an extension direction of an underground structure (existing utility tunnel) 1 until the ground improvement bodies reach a non-liquefaction layer 5 in the shape of the columns, and rod-like reinforcing members (reinforcements) 3 are built in the ground improvement bodies 2 until the reinforcing members do not reach the non-liquefaction layer 5, and thereby a ground improvement wall 4 is constructed; and embedding of the lower end of the ground improvement wall 4 to the non-liquefaction layer 5 is small, on the other hand, the upper end thereof is not constructed to be higher than the middle of the underground structure 1.SELECTED DRAWING: Figure 1

Morimasa Mori
▲くわ▼野 延寿
Hoichi Matsumoto
Yuji Taya
Tsuyoshi Honda
Ryu Yamanaka

JP2019171694A

October 11, 2023

September 20, 2019

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Takenaka Civil Engineering Co., Ltd.
TAKENAKA CORPORATION

E02D27/34; E02D3/12; E02D5/20

JP2016102380A
JP2008303581A
JP2017096045A
JP2018062758A
JP2007247339A
JP2019065629A
JP2014227796A
JP2012102573A
JP2016205004A
JP2015105510A
JP62178619A
JP2015017463A

Takao Osashima

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