Title:
PILE EXTRACTION BACKFILLING METHOD
Document Type and Number:
Japanese Patent JP2021188378
Kind Code:
A
Abstract:
To provide a pile extraction backfilling method that allows the backfilling agent to be mixed with soil and sand evenly throughout a pile extraction hole, and to fill the ground evenly with filler after the pile extraction hole has been backfilled, thereby reducing construction costs.SOLUTION: When a casing 2 is being used for excavation, an existing pile side water jet is sprayed from a side of the casing at a substantially tip of the casing 2 onto a side of an existing pile 7, so that the soil and sand attached to the existing pile 7 can be separated from the existing pile 7 and the soil and sand in the casing 2 can be turned into mud. Then, when the casing 2 is being raised while rotating the casing 2, flowable cement milk is injected from the drilling water filler jet 4 at the substantially tip of the casing 2, so that the mixture of cement milk and muddy soil is filled along the existing pile 7, and the entire length of a pile extraction hole can be almost evenly filled with cement milk to backfill the pile extraction hole.SELECTED DRAWING: Figure 1
Inventors:
KUWABARA SHUICHI
Application Number:
JP2020095147A
Publication Date:
December 13, 2021
Filing Date:
May 30, 2020
Export Citation:
Assignee:
MARUSHIN & CO LTD
International Classes:
E02D9/02
Domestic Patent References:
| JP2001003362A | 2001-01-09 | |||
| JPH06116955A | 1994-04-26 | |||
| JPH06128955A | 1994-05-10 | |||
| JPS62202117A | 1987-09-05 | |||
| JP2012112149A | 2012-06-14 | |||
| JPS53146405A | 1978-12-20 | |||
| JP2002138475A | 2002-05-14 | |||
| JPS5393607A | 1978-08-16 |
Foreign References:
| CN104775433A | 2015-07-15 |
Attorney, Agent or Firm:
Kenichi Maeda
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