US20250305370A1 - Cave cutting method for pillar construction - Google Patents

Cave cutting method for pillar construction

Info

Publication number
US20250305370A1
US20250305370A1 US18/864,882 US202218864882A US2025305370A1 US 20250305370 A1 US20250305370 A1 US 20250305370A1 US 202218864882 A US202218864882 A US 202218864882A US 2025305370 A1 US2025305370 A1 US 2025305370A1
Authority
US
United States
Prior art keywords
casing tube
vibrator
excavating
pole
erection hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US18/864,882
Other languages
English (en)
Inventor
Yusuke SAKURAHARA
Yukihiro Goto
Nobuyuki OKANO
Kenji Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Assigned to NIPPON TELEGRAPH AND TELEPHONE CORPORATION reassignment NIPPON TELEGRAPH AND TELEPHONE CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OKANO, Nobuyuki, GOTO, YUKIHIRO, SAKURAHARA, Yusuke, INOUE, KENJI
Publication of US20250305370A1 publication Critical patent/US20250305370A1/en
Abandoned legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions

Definitions

  • the present disclosure relates to a method for excavating a pole erection hole using a casing tube.
  • a pole erection hole is manually excavated to the depth of about 1.5 m so as not to damage a buried object, and then excavated to a desired depth using a digger derrick truck.
  • Manual excavation work is a time-consuming work with a large burden on the body.
  • FIG. 1 A related method for excavating a pole erection hole is illustrated in FIG. 1 .
  • a reference sign 51 denotes an earth auger drill
  • a reference sign 52 denotes a digger derrick truck.
  • the earth auger drill 51 hung on the tip of a crane of the digger derrick truck 52 is rotated to excavate a pole erection hole (see, for example, Patent Document 1).
  • the earth auger drill 51 Since the earth auger drill 51 always digs soil and sand by rotation, the dug soil and sand need to be discarded manually or by a heavy machine as needed.
  • Patent Literature 1 JP 8-177364 A
  • An object of the present disclosure is to realize excavation of a pole erection hole by a machine to improve the efficiency of excavation work.
  • a method for excavating a pole erection hole of the present disclosure includes vibrating, by the vibrator, the casing tube to cause the casing tube to penetrate into the ground.
  • the present disclosure is a method for excavating a pole erection hole including
  • the present disclosure further includes
  • the present disclosure further includes
  • the shape of the casing tube 12 may be a cylindrical shape with a hollow in the longitudinal direction inside thereof, and as illustrated in FIG. 3 , a cylinder (a) or a square cylinder (b) can be exemplified. With such a shape, there is no sharp portion as compared with the earth auger drill, and the contact portion with a buried object is flat, so that the buried object is hardly damaged even if the casing tube 12 comes into contact with the buried object. Further, unlike the earth auger drill, a stone is not clogged between the blades.
  • a speedometer that detects the penetration speed of the vibrator 11 can be exemplified.
  • the penetration speed of the casing tube 12 is reduced.
  • the speedometer of the vibrator 11 detects the penetration speed smaller than a predetermined value, the vibration of the vibrator 11 is stopped. For example, when the penetration distance in 10 seconds is 1 mm, that is, the penetration speed is smaller than 0.1 mm/second, it is determined that the casing tube 12 has come into contact with the buried object.
  • the buried object is not damaged, so that the pole erection hole excavation work can be realized with safety similar to that of the manual excavation work.
  • a reference sign 12 denotes a casing tube
  • a reference sign 14 denotes a stirring device
  • a reference sign 14 - 1 denotes a rotation shaft of the stirring device
  • a reference sign 14 - 2 denotes nets of the stirring device
  • a reference sign 15 denotes a suction pump.
  • nets having a tier structure as illustrated in FIG. 7 may be used.
  • the lower nets are coarser and the upper nets are finer.
  • the rotation shaft 14 - 1 of the stirring device is rotated, soil is pushed out toward the lower portion of the casing tube 12 .
  • the soil is roughly and strongly loosened with a coarse mesh at the lower part of the nets 14 - 2 of the stirring device, and finely loosened with a fine mesh at the upper part of the nets 14 - 2 of the stirring device.
  • the sizes of the meshes of the nets from coarse to fine in the height direction, the soil is easily loosened.
  • a utility pole is connected to the upper surface of the casing tube 12 .
  • the shape of the casing tube 12 is desirably a cylindrical shape corresponding to a utility pole 22 .
  • a utility pole connecting step will be described with reference to FIGS. 8 , 9 , and 10 . In FIGS.
  • a reference sign 12 denotes a casing tube
  • a reference sign 16 denotes a casing tube bolt hole
  • a reference sign 17 denotes a casing tube bolt
  • a reference sign 18 denotes a casing tube bolt attachment
  • a reference sign 19 denotes an attachment bolt
  • a reference sign 20 denotes an attachment nut
  • a reference sign 21 denotes soil
  • a reference sign 22 denotes a utility pole
  • a reference sign 23 denotes a utility pole bolt hole
  • a reference sign 24 denotes a utility pole bolt
  • a reference sign 25 denotes a utility pole attachment.
  • the attaching mechanism is not limited to that described here. It is only needed that the casing tube 12 and the utility pole 22 are fixed.
  • the casing tube 12 is used as a base of a utility pole when the utility pole is erected, so that labor when erecting the utility pole can be saved and the efficiency of excavation work can be improved.
  • labor of waste soil treatment such as backfill of soil into the gap between the pole erection hole and the utility pole can be saved, so that the efficiency of excavation work can be improved.
  • the present disclosure can be applied to various industries including the information communication industry.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
US18/864,882 2022-05-31 2022-05-31 Cave cutting method for pillar construction Abandoned US20250305370A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/022208 WO2023233549A1 (ja) 2022-05-31 2022-05-31 建柱用穴掘削方法

Publications (1)

Publication Number Publication Date
US20250305370A1 true US20250305370A1 (en) 2025-10-02

Family

ID=89025936

Family Applications (1)

Application Number Title Priority Date Filing Date
US18/864,882 Abandoned US20250305370A1 (en) 2022-05-31 2022-05-31 Cave cutting method for pillar construction

Country Status (3)

Country Link
US (1) US20250305370A1 (https=)
JP (1) JP7798187B2 (https=)
WO (1) WO2023233549A1 (https=)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5027310A (https=) * 1973-07-14 1975-03-20
JPS5894523A (ja) * 1981-12-01 1983-06-04 Tadano Tekkosho:Kk 両端開口の中空杭を地中に打込む方法
JPS5894588A (ja) * 1981-12-01 1983-06-04 株式会社　多田野鉄工所 地中穿孔方法
JPS6016690A (ja) * 1983-07-08 1985-01-28 清水建設株式会社 掘削機
JPS6367319A (ja) * 1986-09-09 1988-03-26 Hitachi Constr Mach Co Ltd 硬さ指数計測装置
JPH0747899B2 (ja) * 1990-10-04 1995-05-24 日本地工株式会社 自立電柱及びその建柱工法
JP2895677B2 (ja) * 1992-04-28 1999-05-24 日立建機株式会社 地盤硬度の判断装置
JPH08158771A (ja) * 1995-03-22 1996-06-18 Kyushu Electric Power Co Inc スクリューアースオーガ装置
JPH1138153A (ja) * 1997-07-23 1999-02-12 Nippon Telegr & Teleph Corp <Ntt> 埋設物探知装置
JP2001159288A (ja) * 1999-12-03 2001-06-12 Tokyo Gas Co Ltd 立坑掘削装置および立坑掘削方法

Also Published As

Publication number Publication date
WO2023233549A1 (ja) 2023-12-07
JP7798187B2 (ja) 2026-01-14
JPWO2023233549A1 (https=) 2023-12-07

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