Title:
FOUNDATION STRUCTURE CONSTRUCTION METHOD
Document Type and Number:
Japanese Patent JP2023150433
Kind Code:
A
Abstract:
To provide a foundation structure construction method capable of improving quality of a pile hole by forming the pile hole using an optimal excavation tool by setting a soil discharge section and a soil left section.SOLUTION: A foundation structure construction method comprises steps of: setting an area of a pile hole foot protection part 42 in a pile hole 40; setting a soil discharge segment where excavated soil is discharged upward; and setting a left soil section where the excavated soil is left downward and an excavated left soil amount. Then, the soil discharge segment is excavated (a, b, c) while discharging the excavated soil with a first excavation tool 10. In the left soil segment continued downward from the soil discharge segment, the ground is excavated with a second excavation tool 15 while loosening the ground, and in the foot protection part 42, by pumping out cement milk, the excavated soil and the cement milk are agitated and mixed or the excavated soil is replaced with the cement milk to form the pile hole foot protection part 42. The pile hole 40 is formed by injecting the cement milk while pulling up the second excavation tool 15 (d, e). A foundation structure 60 is constructed (h) after inserting a precast pile 30 into the pile hole 40 (f, g).SELECTED DRAWING: Figure 1
Inventors:
KITANI YOSHINOBU
Application Number:
JP2022059539A
Publication Date:
October 16, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
MITANI SEKISAN KK
International Classes:
E02D5/50
Attorney, Agent or Firm:
Kenichi Wakui
Norihiro Yamamoto
Kazunaga Suzuki
Takahiro Kudo
Naoto Mitsui
Norihiro Yamamoto
Kazunaga Suzuki
Takahiro Kudo
Naoto Mitsui
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