JPH08218356A - Core sampling device of improvement soil - Google Patents

Abstract

PURPOSE: To sample the core of improvement soil easily by providing a rectangular bucket equipped with a cover capable of being opened and closed with a slide mechanism on the front thereof to a stirring wing of an excavation stirring shaft in a detachable manner, and providing wires for opening and closing the cover to both up and down of the cover on the front of the bucket. CONSTITUTION: A guide having a U-shaped section is inserted in a stirring wind 12 right above an excavation wing 11, and a rectangular bucket is fixed to the U-shaped guide. As a slide construction, the front of the rectangular bucket 2 is pulled upward to open a cover thereof, and a front wire 24 is mounted to the upper part of the cover so that the cover can be pulled out. The rectangular bucket 2 is provided to an excavation stirring shaft, and the force-fit of the excavation stirring shaft is made in the ground after it is stirred with cement milk while keeping a state to lightly pull a rear wire 25 for closing the front cover. When the excavation stirring shaft is lowered up to a specific depth, the rear wire 25 is loosed, the front wire 24 is pulled to open the cover of the rectangular bucket 2, and when the excavation stirring shaft is revolved, a sample of required core is scooped in the rectangular bucket 2.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] The present invention relates to a device for collecting a core of improved ground when the ground is excavated and mixed with cement milk to improve the ground for the purpose of strengthening the ground, in order to investigate the soil quality of the underground ground.

[0002]

2. Description of the Related Art In recent years, soft ground is frequently improved and strengthened in preparation for effective use of land and earthquakes. There are various methods for ground improvement, but the method of excavating the ground and stirring it with cement milk to improve the ground is a typical ground improvement method. However, it was not easy to confirm the condition of the lower part of the ground where cement milk was stirred and injected.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides an apparatus capable of easily sampling a core of an arbitrary depth after excavating the ground and stirring and injecting cement milk.

[0004]

[Means for Solving the Problems] A rectangular bucket having a lid that can be opened and closed by a slide mechanism on the front surface is attached to a stirring blade of an excavation stirring shaft so as to be detachable by a U-shaped guide so that the bottom surface becomes horizontal. However, the purpose of the core collecting device of the improved ground is to provide wires for opening and closing the lid on the front side of the bucket, with the front lid closed on the excavation stirring shaft. Equipped with a bucket, the lower wire on the lid is dipped under the excavation blade and pulled lightly to press it into the improved ground. After press-fitting to a predetermined depth, pull the wire provided on the top of the lid to dive under the excavation blade, loosen the wire that was being pulled lightly at the rear, open the lid of the bucket, rotate the excavation blade once to open the core of the improved ground. Scoop into the bucket, pull the wire behind the bucket, close the lid and pull up without rotating the excavation shaft to collect the core.

[0005]

According to the present invention, after excavating the ground and stirring and injecting cement milk, the bucket mounted on the upper part of the blade of the excavation stirring shaft is pressed into the improved ground and mounted on the upper part of the blade of the excavation stirring shaft. A core of any depth can be easily collected in the bucket.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The core sampling device for improved ground of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram of a digging and stirring shaft 1 and a bucket 2. The tip of the excavation stirring shaft 1 has a conical shape, and an excavation blade 11 is provided on the upper part of the conical shape. A plurality of stirring blades 12 are provided on the upper portion of the blade 11, and a guide 21 having a U-shaped cross section is inserted into the stirring blade 12 immediately above the excavation blade 11, and a rectangular bucket 22 is attached to the U-shaped guide 21. Stick to it. The rectangular bucket 22 is angled with respect to the bottom of the rectangular bucket 22 so that the bottom surface becomes horizontal when inserted into the stirring blade 12. The rectangular bucket 22 is inserted into the stirring blade 12, the bucket 2 is attached to the excavation stirring shaft 1, and the front surface of the rectangular bucket 22 is pulled upward with respect to the direction in which the excavation stirring shaft 1 rotates in the excavation direction. And a slide structure that opens so that the lid 2
A wire 24 is attached to the upper portion of the lid 23 so that the wire 3 can be pulled. Further, a wire 25 is attached to the lower portion of the lid 23 so that the lid 23 can be pulled even from the rear of the rectangular bucket which dives under the excavation blade 11.

FIG. 2 shows a rectangular bucket 2 for excavating and stirring a shaft 1.
FIG. 10 is a diagram in which the rear wire 25 is lightly pulled in order to close the front lid 23 by mounting the wire on the rear side. While keeping this state, the excavation stirring shaft 1 is pressed into the ground after stirring with the cement milk. When the excavation and agitation shaft 1 descends to a predetermined depth, the wire 25 is loosened, the wire 24 is pulled, the lid 23 of the rectangular bucket 2 is opened, and the excavation and agitation shaft 1 is rotated once in the excavation direction. A sample of the required core is scooped into bucket 2.

FIG. 3 is a detailed view of the bucket 2, and FIG.
Shows a state in which the wire 24 is pulled, the wire 25 is loosened, and the lid 23 of the bucket 2 is opened.

When the core sample is scooped into the bucket 2, the wire 25 is pulled again, the wire 24 is loosened, the lid 23 of the bucket 2 is closed, the excavation and agitation shaft 1 is pulled up without rotating, and the lid 23 is opened on the ground. Then, the core sample is enclosed in a predetermined mold of φ50 mm × h100 mm from the sampled core to complete the core collection.

The surface of the rectangular bucket 2 facing the lid 23 may be opened and closed so that the core sample can be taken out easily.

[0012]

According to the present invention, the core of the improved ground, which has been considered difficult in the past, can be easily manufactured with a simple device.

[Brief description of drawings]

FIG. 1 is a diagram of a digging and stirring shaft 1 and a bucket 2.

FIG. 2 is a diagram in which a rectangular bucket 2 is attached to the excavation and agitation shaft 1 and a rear wire 25 is gently pulled to close a front lid 23.

FIG. 3 is a detailed view of the bucket 2.

FIG. 4 shows a state in which the wire 24 is pulled, the wire 25 is loosened, and the lid 23 of the bucket 2 is opened.

[Explanation of Codes] 1 ... Excavation stirring shaft, 11 ... Excavation blade, 12 ...
Stirring blade, 2 ... Rectangular bucket, 21 ... U-shaped guide, 22 ... Bucket, 23 ... Lid, 24 ...
・ Front wire, 25 ・ ・ ・ Rear wire

Claims (1)

[Claims] 1. A rectangular bucket having a lid on the front surface which can be opened and closed by a slide mechanism is detachably mounted on a stirring blade of an excavation stirring shaft with a U-shaped guide so that the bottom surface is horizontal. A core collecting device for improved ground, characterized in that wires for opening and closing the lid on the front side of the core are provided.