JP3205279U - Cut bucket - Google Patents

Abstract

To provide a cut bucket that can easily remove an underground obstacle including an existing pile by applying a drilling bucket. A reinforcing plate 3 is engaged with an upper portion of a cut drum 2 corresponding to a drilling bucket having the same diameter as the removed pile in order to excavate the inside of the casing, which is used for removing underground obstacles made of cast-in-place concrete piles. In addition, a blade blade 6 inclined at 120 degrees is engaged with the upper inside, and a blade cutting bit 7 is attached to the blade plate 6 so that the blade cutting bit 7 can be attached and replaced. . In addition, the main bucket is configured with a structure in which the drum cutting bit 8 can be attached and exchanged to the lower circumferential end surface 9 of the cut drum 2. [Effects] As the work period is reduced, construction costs and safe and efficient underground obstacles can be removed. [Selection] Figure 2

Description

  The present invention relates to a drilling bucket using a multi-drilling machine that efficiently removes cast-in-place piles and other underground obstacles.

  As a method of removing the underground obstacle, there is a method of cutting the casing to dig up to a predetermined position, capturing the obstacle targeted for removal in the casing, and appropriately discharging the obstacle.

  However, in recent years, the removal of a robust cast-in-place pile structure has a tendency to increase the difficulty of removing underground obstacles, such as prolonged enforcement period and construction difficulties.

  In addition, there are constructions where it is difficult to obtain information such as land use history and structure design drawings, and there are uncertainties in construction.

  And in many removal works, it is also required to shorten the work period with the aim of reducing construction costs, and it is in the gap between the uncertain elements of the construction site, and it is forced to give priority to the rapidity of high difficulty construction, Its construction cannot be said to meet the performance of modern urban civil engineering.

  JP 2014-118807 A   JP 2011-0747446 A   JP 2010-185188 (P2010-185188A)

  Mechanization of construction 607, 39-42, 2000-09-25 Japan Construction Mechanization Association

  Conventional drilling buckets can crush and remove underground obstacles according to various grounds, but it is difficult to say that they are suitable for removing strong cast-in-place piles such as existing piles. Then, the cutting bucket which applies a drilling bucket and can remove the underground obstacle including an existing pile easily is provided.

  Based on the shape of the drilling bucket, a bottom cover is not provided, and a plurality of exchangeable cutting bits are attached to the lower part of the drilling bucket. Provided is a cut bucket capable of easily cutting and removing an underground obstacle including a cast-in-place pile by attaching an exchangeable cutting bit to a certain width and rotating and excavating.

  As the work period is reduced, construction costs and safe and efficient underground obstacles can be removed.

It is outline | summary explanatory drawing of the existing pile removal in the multi-drill machine of this invention. It is structure explanatory drawing of this cut bucket. It is structure explanatory drawing seen from the bottom face of this cut bucket.

  Hereinafter, using the excavation bucket in the multi-drilling machine of the present invention, it is a description of the sequence expansion for carrying out the rotary press-in excavation, cutting, crushing, and removing the existing cast-in-place pile. It is not limited to examples. In addition, the same reference numerals may be omitted for the same materials, configurations, parts, and the like in the following description.

FIG. 1 is a schematic explanatory diagram of the multi-drill method according to the present description, in which a pile hole is excavated using the cut bucket of the present invention.
A is a multi-drill machine equipped with a drilling device. The kelly bar B is loaded with a cut bucket 1 or a stand pipe and a well-known first casing (not shown) in a kelly bar socket.

  A ruler iron plate is set on the drilling pile core, and a stand pipe that is slightly larger than the pile diameter is set at the excavation position using a multi-drill machine.

  A standpipe is press-fitted at the mouth of the drilling hole to prevent the topsoil from collapsing.

  Set the removed pile with the same diameter casing (with tip bit) on the attachment part of the multi-drilling machine.

  Rotating excavation while cutting the outer periphery of the removed pile with the tip bit of the casing.

  The excavation is temporarily stopped at a certain depth, the casing is pulled out, and the cut bucket 1 having a diameter slightly smaller than the removed pile is exchanged and loaded.

  When the cut bucket 1 is rotated and excavated at a certain depth from the pile head of the removed pile in the same manner as the casing rotary excavation procedure, the main reinforcing bar of the removed pile is twisted off and blocked in the cut bucket, and can be removed.

  After removing and collecting the removed piles in the cut bucket at a predetermined location, repeat the above procedure.

  Again, the operations in the preceding paragraphs 0016 to 0019 are repeated until the pile pile of the removed pile is lowered.

  2 and 3 are explanatory views of the structure of the cut bucket 1 of the present invention, and FIG. 2 is a partial sectional view of the cut bucket. Reference numeral 2 denotes a cut drum, and reference numeral 3 denotes a drill pipe reinforcing plate which is engaged with a Kelly bar socket 4 with a pin hole 5 by welding.

  FIG. 3 is an explanatory view of the arrangement of cutting bits when the cut bucket 1 is viewed from the bottom. Reference numeral 6 denotes a blade, which is welded to the reinforcing plate 3, and the blade 6 has a position where the blade cutting bits 7 are arranged. The intervals are arranged so as not to overlap with the trajectories of the blade cutting bits adjacent to each other, and the cutting bits are provided to be exchangeable. 8 is equipped with a drum cutting bit having a structure that can be exchanged at regular intervals on the end surface 9 of the lower circumferential end surface of the cut drum.

A Multi-drill machine B Kelly bar C Stand pipe 1 Cut bucket 2 Cut drum 3 Reinforcement plate 4 Kelly bar socket 5 Pin hole 6 Blade plate 7 Blade plate cutting bit 8 Drum cutting bit 9 Drum lower circumferential end surface

Claims (1)

  Based on the shape of the drilling bucket, a bottom cover is not provided, and a plurality of exchangeable cutting bits are attached to the lower part of the drilling bucket. A cutting bucket that can easily cut and remove underground obstacles including cast-in-place piles by attaching a replaceable cutting bit to a certain width and rotating it.