JP4521848B2 - Earth removal backfill hole forming device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a soil discharge backhole forming apparatus that efficiently backfills earth and sand generated at a construction site or the like into the ground.
[0002]
[Prior art]
There is a considerable amount of earth and sand generated at the construction site, such as cutting and burying piles and excavating underground structures. Such generated soil is conventionally treated by dumping trucks to a required disposal site and landfilling. In the method of processing such generated soil (excavated soil), it becomes difficult to secure a disposal place to process it, and it requires a large amount of transportation cost, which greatly affects the construction cost It is becoming. In particular, construction sludge containing cement, caking agent, etc. in the generated soil is subject to regulations as industrial waste and has a high water content ratio, which makes disposal more difficult.
[0003]
[Problems to be solved by the invention]
Therefore, instead of the above method, it has been considered to process the soil at the site. This is intended to solidify and reduce the volume by mixing a solidifying agent or the like with the soil. However, in this method, there is a problem that dust is generated inside and outside the site and the environment is deteriorated because the powder solidifying agent is sprinkled and mixed with the soil when solidifying. In addition, since construction sludge contains a large amount of water, it is necessary to dehydrate it, and a large amount of cost and labor are required to install the equipment.
[0004]
The present invention was made in order to solve the above-mentioned conventional problems, and is provided with spiral blades and excavating blades at a place other than where pillars, footings, piles, etc. are located in the construction site, By screwing and lifting the casing that can be opened and closed at the lower end, forming a backfill hole for the soil in the ground, filling the hole with the soil, and processing it at a low cost on site It is an object of the present invention to provide a draining backfill hole forming apparatus capable of increasing the effective earth pressure more efficiently than before construction.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a vertically long main body pipe having a screw wing for projecting on the outer periphery thereof and having upper and lower ends opened, and a lower part of the main pipe that is externally fitted to the lower end of the main pipe. A casing made of a drilling cylinder that protrudes downward and is fixed to the main body pipe, and has a large number of drilling blades protruding at the lower end, and is formed by the lower end of the main body pipe and the inner periphery of the drilling cylinder that protrudes downward from the lower end. An apparatus for forming a soil refilling hole, comprising: a cover plate that closes an open lower end of a casing that does not have an excavating blade that is detachably stored in a recessed portion.
According to the second aspect of the present invention, there is provided a vertically long main body pipe having a screwed spiral blade projecting on the outer periphery thereof and having upper and lower ends opened, and a lower part of the main pipe that is externally fitted to the lower end of the main pipe. A casing consisting of a drilling cylinder projecting downward and fixed to the main body pipe, and having a plurality of drilling blades projecting at the lower end thereof, and attached to the drilling cylinder projecting downward from the lower end of the main body pipe by means of a connecting tool. A drainage backfill hole forming device comprising a lid plate that closes an open lower end of a casing.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of a soil removing the backfill hole forming apparatus of the present invention, Figure 4 shows the same another embodiment, FIG. 5, the process of dumping by dumping backfill porator there is shown a square method in the order of steps.
[0008]
First, an earth removal filling hole forming apparatus according to an embodiment of the present invention will be described. 1 to 3, reference numeral 1 denotes a casing, 2 denotes a main pipe of the casing, which is formed in a vertically long shape, and its upper and lower ends are opened. At the lower end portion of the main pipe 2, a drilling cylinder 3 having a large number of excavating blades 4 projecting from the lower end is externally fitted, and a lower portion thereof projects downward from the lower end of the main pipe 2 by a required length and is fixed by welding or the like. ing. A spiral screw 5 for casing screwing is provided on the outer periphery of the lower end portion of the casing 1 so as to protrude about one turn. Further, spiral ribs 6 having substantially the same pitch as the spiral blades 5 are provided on the outer periphery of the casing 1 above the spiral blades 5 as necessary.
[0009]
7 is a cover plate that opens and closes the opened lower end of the casing 1, and is formed by providing reinforcing ribs 9 on the upper surface of a plate body 8 having a diameter slightly smaller than the inner diameter of the excavation cylinder 3, as shown in FIG. The main pipe 2 of the casing 1 is detachably housed in a recessed portion formed at the lower end of the main pipe 2 and the inner periphery of the excavation cylinder 3 projecting downward therefrom.
[0010]
The soil disposal method is performed using the above-described apparatus. First, as shown in FIG. 5 (a), the cover plate 7 is placed on the ground, and the casing 1 is suspended as shown by an arrow and is loosely fitted to the cover plate 7 (see FIG. 1). In this state, the casing 1 is pressed while being rotated in the screwing direction of the spiral blade 5 as shown in FIG. As a result, the ground is excavated by the excavating blade 4, and the casing 1 is penetrated into the ground by the screwing action of the spiral blade 5. The excavated earth and sand are pushed out to the outer periphery of the casing 1. As a result, it will be consolidated on the ground in the outer periphery.
[0011]
As shown in FIG. 5C, when the casing 1 reaches a predetermined depth, the casing 1 is rotated in the reverse direction as shown in FIG. Put the earth a into the inside. When the casing 1 is lifted, the cover plate 7 is left in the ground, and the loaded soil is filled in the holes 10 formed by lifting the casing 1. After the lifting of the casing 1 is completed, a soil column 11 filled with the discharged soil a is formed in the backfill hole 10 formed by the penetration of the casing 1 as shown in FIG. In addition, throwing-in of the soil a can be performed after the casing 1 is pulled up.
[0012]
The backfilled soil a can be made into a solid earth pillar 11 by applying pressure as necessary, and can be made into a solid soil pillar 11. In addition to the surrounding ground strengthened by the penetration of the casing 1, It can be used for improvement.
[0013]
FIG. 4 shows another embodiment of the device. In this apparatus, a cover plate 7 that closes the open lower end of the casing 1 is attached to the excavation cylinder 3 by a connector 12. Accordingly, when the casing 1 is pulled up, the casing 1 can be lifted in a suspended state without leaving the lid plate 7 in the hole 10. Therefore, the cover plate 7 can be used together with the casing 1. In the example shown in the figure, the connector 12 is provided outside the excavation cylinder 3, but it can also be provided inside the excavation cylinder 3.
[0015]
【The invention's effect】
As described above , according to the earth filling back hole forming apparatus of the present invention, it is assumed that the casing provided with the excavating blade and the helical blade for screwing and the lid plate engaged with the open lower end are provided. Since the soil can be screwed and penetrated into the ground, it is possible to easily and efficiently form a hole for backfilling the ground in the construction site, and the surrounding ground is consolidated by the penetration of the casing. Therefore, it can also be used for ground improvement such as increasing the effective earth pressure of the ground than before construction.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows one embodiment of a soil refilling hole forming apparatus, in which (a) is a half cut side view, (b) is a plan view, and (c) is a bottom view.
FIG. 2 is a half-side view showing a casing of the apparatus.
FIGS. 3A and 3B show a cover plate of the apparatus, wherein FIG. 3A is a side view and FIG. 3B is a plan view.
FIG. 4 is a side sectional view showing another embodiment of the apparatus.
5 (a), (b), (c), (d) and (e) show embodiments of the method of the present invention in the order of steps.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Main pipe 3 Excavation cylinder 4 Excavation blade 5 Spiral blade 6 Spiral rib 7 Cover plate 8 Plate body 9 Reinforcement rib
10 Backfill hole
11 Earth pillar
12 coupling

Claims (2)

A vertically long main body pipe with screwed spiral wings protruding on the outer periphery and open at the upper and lower ends, and a lower part that is externally fitted to the lower end protrudes downward from the lower end of the main body pipe to the required length. A casing made up of a drilling cylinder that is fixedly provided with a plurality of drilling blades projecting from the lower end thereof, and a recessed portion formed by the lower end of the main body pipe and the inner periphery of the drilling cylinder that projects downward from the lower end of the main pipe. A drainage backfill hole forming device comprising a cover plate that closes an open lower end of a casing that does not have a stored excavation blade. A vertically long main body pipe with screwed spiral wings protruding on the outer periphery and open at the upper and lower ends, and a lower part that is externally fitted to the lower end protrudes downward from the lower end of the main body pipe to the required length. A casing comprising a drilling cylinder fixedly provided with a plurality of drilling blades projecting at the lower end thereof, and an open lower end of the casing attached to the drilling cylinder projecting downward from the lower end of the main body tube by a connector. An earth removal back-hole forming apparatus comprising a lid plate for closing.

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