AC method|Shinmei Gikou Shinmei Techno

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Introduction of Construction Methods

AC method

This is Hammer Grab Soil Removing method using All Casing method.

NETIS Registration No. QS-130012-A
Novelty and expected benefits ① What kind of novelty does it have? (What was improved compared to conventional technology?)
  • By installing shell's opening and closing device at the external side of the main body, the volume of the excavated soil in its container was expanded.
  • By increasing the weight of the main body, its excavating power was improved.
  • Enabled the attachment of removable counterweight.
② What are its expected benefits? (What are the advantages of using its new technology?)
  • By expanding the volume of the excavated soil in its container and increasing the weight of the main body, the volume of the excavated and removed per cycle soil will increased.
  • By increasing and decreasing the counterweight, effective handling will be enabled according to ground condition (soil property, retained water in the casing and so on)
  • By improved construction efficiency, the reduction of construction expenses and time is achieved.
Applicable ranges ① Applicable ranges
  • Soil property: high sabulosity soil, sand and sandy soil, rudaceous soil, round stones, soft rock (I)
    (Has been applied to N value 50 of Soft Rock Type I or the like)
  • Applicable diameters: φ1000, φ1200, φ1500 and φ 2000mm
  • Digging length: Max. 50 m (Our longest record is 54.6 m)
② Applicable ranges, which are especially effective
  • Soft ground
  • Underwater drilling
  • Site which requires a reduction of construction time
③ Non applicable range
  • Soft rock (II), medium-hard rock, hard rock
Points of concern In construction
  • When the level of the water retained in the casing is high, or when there are any hard formations in the middle of the casing, counterweight is required.
  • Since the weight is increased, operating radius of crawler crane and other points should be reviewed.
AC method