JPH07150549A - Concrete wall cleaning device - Google Patents

Abstract

PURPOSE:To clean an existing concrete wall which is constructed underground easily and certainly. CONSTITUTION:A nozzle 10 to spout a high pressure water toward an underground existing concrete wall (c) is furnished at the side of an excavating machine 1 which excavates underground downward along the concrete wall (c), and with this nozzle 10 a hose 17 is connected which can move in the vertical direction in pursuit of the rise and fall of the excavating machine 1. Through the hose 17, a high pressure water is supplied from a water supply part 20 to the nozzle 10, and the wall (c) is cleaned with the high pressure water spouted out of the nozzle 10, wherein the water will have access to each recess formed in the wall (c). This ensures removing earth and sand attached to existing concrete wall, including those which are attached to the inside of recesses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete wall cleaning device for cleaning a concrete wall constructed underground,
In particular, the present invention relates to cleaning the connecting surface of the underground continuous wall when constructing the underground continuous wall used as an earth retaining wall or a foundation of a structure.

[0002]

2. Description of the Related Art As is well known, underground continuous walls are earth retaining walls,
It constitutes a water blocking wall or the foundation of a structure or an underground structure, and is constructed as follows, for example.
That is, the preceding elements forming the portion of the underground continuous wall are formed so as to be separated from each other by substantially one element length. These preceding elements are constructed by excavating a preceding excavation groove for forming the preceding element, then constructing a reinforcing bar cage in the preceding excavation groove, and placing concrete therein. Once the leading elements have been built, the leading elements are excavated to form the trailing trenches for the trailing elements. Then, in this trailing excavation groove, a reinforcing rod cage is built, concrete is placed therein to form a trailing element, and the leading element and trailing element are connected to continue underground. Build a wall, a continuous wall underground.

As described above, since the underground continuous wall is constructed by connecting the elements to each other, the connection of the preceding element is made at the time of forming the trailing excavation groove in order to make the connection reliable and strong. It is necessary to clean the surface to remove the earth and sand adhering to this connection surface. Conventionally, this connection surface is cleaned by excavating the trailing excavation groove by the excavator to the design depth, then attaching a scraping plate to this excavator, and moving the excavator up and down along the connection surface to scrape it. This was done by scraping off the adhered sand with a plate.

[0004]

By the way, in order to strengthen the connection of the elements constituting the underground continuous wall, unevenness is formed on the connection surface or when the elements are constructed. Accidentally, unevenness may be formed on the connection surface, but in the cleaning with the scraping plate, the scraping plate may not be able to sufficiently enter the recessed portion,
Therefore, it has been difficult to sufficiently remove the earth and sand attached to the recesses. If the soil in the recesses cannot be removed sufficiently,
Since the connection strength between the elements is reduced, in the above case, the recess must be separately cleaned, which is one of the factors that prolong the construction period.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a concrete wall cleaning device capable of easily and surely cleaning the connection surface (existing concrete wall) of an element.

[0006]

In order to achieve the above object, the concrete wall cleaning device according to claim 1 of the present invention excavates the ground downward along the existing concrete wall. Machine and the side of this excavator,
A nozzle part for injecting high-pressure water toward the existing concrete wall, a hose connected to this nozzle part at one end and capable of moving up and down following up and down movements of an excavator, and installed on the ground and of the hose A high-pressure water supply unit that is connected to the other end and supplies high-pressure water to the nozzle unit via the hose.

The concrete wall cleaning device according to a second aspect of the present invention is the concrete wall cleaning device according to the first aspect, in which a protective film is attached to a side portion of the excavator to cover the nozzle portion from the left and right and to abut against an existing concrete wall.

[0008]

In the concrete wall cleaning device according to the first aspect of the present invention, after the excavation by the excavator is completed, the high-pressure water is supplied from the high-pressure water supply section to the nozzle section through the hose, and the high-pressure water ejected from the nozzle section is ejected. By cleaning the existing concrete wall with, the high-pressure water is spread even in the recess formed in the existing concrete wall, and the adhered earth and sand adhering to the existing concrete wall is also removed by this. To do.

Further, in the concrete wall cleaning device according to the second aspect, high pressure water sprayed from the nozzle portion and bounced back from the existing concrete wall is blocked by a protective film so that it is constituted by a soil surface other than the existing concrete wall. To prevent collapse of the exposed side walls.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the concrete wall cleaning apparatus of the present invention will be described below with reference to FIGS.
In these figures, reference numeral 1 indicates an excavator. The excavator 1 has an excavator 2 provided at the tip (lower end) of the excavator main body 1a, and has a base end (upper end) of the excavator main body 1a.
Is suspended by the wire 3 and descends by its own weight. The excavation unit 2 is an excavator body 1a.
Mainly includes a pair of shovel parts 5 and 5 which are rotatably provided around the shafts 4 and 4 at the lower end of each of the shovel parts 5 and 5 and which can come into contact with and separate from each other, and cylinder parts 6 and 6 which come into contact with and separate from the shovel parts 5 and 5. It is configured as, while making the shovel parts 5 and 5 contact and separate,
Excavation is performed by lowering the excavator body 1a. When excavating, the excavation groove M is filled with bentonite mud, and the excavation is performed in this mud.

Guide members 7, 7 are attached to the upper and lower ends of the excavator body 1a, respectively. These guide members 7 and 7 prevent the excavator 1 from swinging in the left-right direction in FIG. 1 during the excavation descent, and are guided to the excavated excavation surface to stabilize the excavator 1 in a stable manner. It can be lowered. On the other hand, the excavator body 1a
Guide members 8, 8 are attached between the upper and lower guide members 7, 7 at the central portion of the. These guide members 8 and 8 prevent the excavator 1 from swinging in a direction orthogonal to the plane of the drawing in FIG. 1, and are guided by the excavated excavation surface to stably lower the excavator 1. It is like this.

The guide member 8 is, as shown in FIG.
It is composed of a fixed guide 8a and an adjustment guide 8b, and a nozzle portion 10 is provided at the lower end of the fixed guide 8a. The nozzle part 10 is for injecting high-pressure water toward the existing concrete wall C, and is a main pipe rotatably mounted around a horizontal axis on a metal fitting 11 having an L-shaped cross section for supporting the fixed guides 8a. 10a and a branch pipe 10b branched from the tip of the main pipe 10a in two directions,
10b and nozzles 10c, 10c provided at the tip of these branch pipes 10b, 10b.
Therefore, in the nozzle portion 10 having this configuration, the main pipe 10a
The nozzles 10c, 10c at the tips of the branch pipes 10b, 10b by rotating the nozzles by a rotation drive unit (not shown).
Rotates in a vertical plane, and is capable of ejecting high-pressure water over a wide area.

On the other hand, on the side of the excavator body 1a, there is provided a fixed pipe 12 extending vertically and having a lower end bent toward the main pipe 10a of the nozzle portion 10. The fixed pipe 12 is fixed to the fixed guide 8a and the upper guide member 7 by metal fittings 13, 13. The tip end of the fixed pipe 12 is connected to the main pipe 10a by a union joint 1
4 through which the high-pressure water flows from the fixed pipe 12 into the nozzle portion 10.

Further, as shown in FIG. 3, protective films 15, 15 made of rubber plates are attached to the guide members 8, 8 through metal fittings 16, 16. These protective films 15 and 15 extend vertically so as to cover the nozzle portion 10 from the left and right, and the horizontal end portion thereof is bent inward and abutted on the existing concrete wall C. Therefore, since the high-pressure water sprayed from the nozzles 10c, 10c to the existing concrete wall C and splashing from the existing concrete wall C is not blocked by the protective films 15, 15 and reaches the side wall S of the excavation groove M, This side wall S
Can be prevented from collapsing.

A hose reel 16 is installed on the ground on the side of the excavation trench M. A high-pressure hose 17 is unwound from the hose reel 16 as the excavator 1 moves up and down, so that the hose 17 can move up and down. The tip (one end) of the hose 17 is connected to the fixed pipe 12, and the other end of the hose 17 is connected to the high-pressure water supply unit 20 installed on the ground beside the hose reel 16 by connecting the connection hose 20a. Connected through. Then, from this high-pressure water supply unit 20, high-pressure water is supplied to the nozzle unit 10 via the connection hose 20a, the hose 17, and the fixed pipe 12.

A tank 21 is installed beside the high-pressure water supply unit 20, and water is supplied from the tank 21 to the high-pressure water supply unit 20 via a pipe 21a. On the other hand, in the excavation groove M, a submersible pump 2
2 is provided. The muddy water sucked from the submersible pump 22 is returned to the tank 21 via the pipe 22a, and the filter 21b provided at the tip of the pipe 21a.
The mud is removed by and is allowed to flow into the pipe 21a. Therefore, since the high-pressure water supply unit 20 circulates the muddy water in the trench M to supply the high-pressure water to the nozzle unit 10, it is necessary to newly prepare water for cleaning the existing concrete. Not economical.

In the concrete wall cleaning device having the above construction, after the excavator 1 has finished excavating the excavation groove M, the connection hose 20a, the hose 17, and the fixed pipe 12 are moved from the high-pressure water supply device 20 while raising the excavator 1. High-pressure water is supplied to the nozzle portion 10 via the nozzle 10, and the high-pressure water is jetted toward the existing concrete wall C from the nozzle 10c at the tip of the nozzle portion 10. Therefore, even if a recess is formed in the existing concrete wall, the high-pressure water spreads in this recess as well.
It is possible to easily and surely remove the soil and dirt attached to the recesses. In addition, the high-pressure water that bounces off the existing concrete wall C is blocked by the protective films 15 and 15, and the excavation trench M is cut off.
Since it does not reach the side wall S, it is possible to prevent the side wall S from collapsing.

In the above embodiment, in order to inject high-pressure water over a wide range from the nozzle portion 10, the nozzle portion 10 is constructed so that the nozzle 10c at its tip can rotate in a vertical plane. Without being limited to this, the nozzle unit 10 may extend vertically and a large number of nozzles may be formed at predetermined intervals therein, or the nozzles may be configured to rotate vertically and horizontally. .

[0019]

As described above, according to the first aspect of the present invention.
According to the concrete wall cleaning device of, on the side of the excavator that excavates the ground downward along the existing concrete wall,
A nozzle that injects high-pressure water toward the existing concrete wall is provided, and a hose that can move up and down following the up and down movement of the excavator is connected to this nozzle, and high-pressure water is supplied from the high-pressure water supply unit through this hose. Is supplied to the nozzle part, and the high-pressure water ejected from the nozzle part cleans the existing concrete wall, so even if a recess is formed in the existing concrete wall, the high-pressure water will also spread into this recess. The adhered earth and sand adhered to the existing concrete wall can be easily and surely removed including the adhered earth and sand in the recess.

Further, according to the concrete wall cleaning device of the second aspect, since the protective film which covers the nozzle portion from the left and right and abuts against the existing concrete wall is attached to the side portion of the excavator, the existing concrete wall can be removed. The high-pressure water that bounces back,
Since the protective film does not reach the side wall constituted by the soil surface or the like other than the existing concrete wall, the side wall can be prevented from collapsing.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a concrete wall cleaning device of the present invention.

FIG. 2 is an enlarged view of a nozzle portion of the concrete wall cleaning device shown in FIG.

FIG. 3 is a plan view of a nozzle portion of the concrete wall cleaning device shown in FIG.

[Explanation of symbols]

 C Existing concrete wall 1 Excavator 10 Nozzle part 15 Protective film 17 Hose 20 High pressure water supply part

Claims (2)

[Claims] 1. A concrete wall cleaning device for cleaning an existing concrete wall constructed in the ground, the excavator excavating in the ground downward along the existing concrete wall, and the side of the excavator. Nozzle provided in the section for injecting high-pressure water toward the existing concrete wall, one end connected to this nozzle section, and a hose that can move up and down following up and down of the excavator, and on the ground A concrete wall cleaning device, comprising: a high-pressure water supply unit that is installed and connected to the other end of the hose, and that supplies high-pressure water to the nozzle unit via the hose. 2. The concrete wall cleaning device according to claim 1, further comprising a protective film, which covers the nozzle portion from the left and right and is in contact with an existing concrete wall, on a side portion of the excavator.