JPH0516275Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a vacuum cleaner for cleaning vertical joints for underground continuous walls used to connect the preceding wall and the rear wall when constructing underground continuous walls. It is something.

(Prior Art) Generally, when forming an underground continuous wall, a stabilizing liquid construction method is known in which bentonite slurry or the like is used as a stabilizing liquid. This construction method prevents the walls of the excavated trench from collapsing due to the head pressure of mud mixed with bentonite and polymer additives, and the excavated earth and sand are transported to the ground together with mud and the concentration is adjusted. The water flows back into the excavated trench. For this reason,
An underground continuous wall can be formed efficiently. However, in this stabilizing liquid construction method, muddy water such as bentonite is used as the stabilizing liquid, which causes slime and mud cake to adhere to the joints, resulting in a decrease in the strength of the continuous wall joints and water leakage.

For this reason, various methods have been proposed for cleaning joints before concrete is poured. Generally used vacuum cleaners are equipped with wire brushes, injection nozzles, etc. along the inside and outside of the anchor reinforcing bars of vertical joints for underground continuous walls, and are hung vertically using their own weight to clean them one after another. It is.
An example of a conventional joint vacuum cleaner will be described below with reference to the accompanying drawings. FIG. 7 is a plan view showing a conventional joint vacuum cleaner in use. In the figure, a joint vacuum cleaner 1 includes an injection section 3 equipped with a high-pressure jet injection nozzle 2, a submersible pump 4 connected to the injection section 3, and a brush body 6 on which a brush 5 is installed.
It is composed of etc. In a vacuum cleaner with such a configuration, after placing underwater concrete for the preceding element, a groove for the succeeding element is excavated, and a high-pressure jet jet is injected from the inside to the anchor reinforcing bar 7 of the joint for the underground continuous wall by the submersible pump 4. do. Further, from the outside of the anchor reinforcing bar 7, a brush body 6 on which a brush 5 is installed slides up and down to remove slime and the like accumulated on the anchor reinforcing bar.

In addition, the joint vacuum cleaner shown in FIG. It is equipped with a covering wall 8, etc. In the vacuum cleaner configured as above, the jet jet ejected from the jet nozzle 2 is
The anchor reinforcing bars 7 are cleaned from the inside, and after being reflected by the cover wall 8, the anchor reinforcing bars 7 are cleaned from the outside.

(Problem to be solved by the invention) By the way, in the above-mentioned conventional joint cleaner, it is possible to clean reinforcing bars that are consecutively arranged in the vertical direction, but when the U-shaped loop reinforcing bars are cleaned horizontally. When attempting to clean the joints of the continuous underground walls, it was not possible to efficiently remove the slime adhering to the inside and outside of the loop reinforcing bars.

Particularly with a one-piece vacuum cleaner, it is difficult to efficiently clean the inside and outside of the looped reinforcing bar at the same time.

Furthermore, there was a drawback in that the slime removed from the loop reinforcing bars with the brush of a vacuum cleaner or a jet jet fell directly into the stabilizing liquid in the excavated trench.

SUMMARY OF THE INVENTION An object of the present invention is to provide a joint cleaner for an underground continuous wall, which has been developed in view of the above-mentioned drawbacks and is capable of efficiently cleaning the inside and outside of loop reinforcing bars at the same time.

(Means for Solving the Problems) A joint vacuum cleaner for an underground continuous wall according to the present invention is arranged at the boundary between a leading wall and a trailing wall when constructing a continuous underground wall, and is installed at the end of the leading wall. an inner cleaner that cleans a U-shaped anchor reinforcing bar erected on a partition steel plate that partitions the area from inside the loop, and an outer cleaner that cleans from the outside of the loop, the inner cleaner protruding outward. The outer cleaner has a cross section of about U, on which a plurality of brushes are installed, and a suction port for sucking up the slime removed from the anchor reinforcing bars, etc. It has a structure with a letter-shaped wall.

(Function) As described above, the joint cleaner for underground continuous walls according to the present invention can clean the inside of the loop reinforcing bars with the inner cleaner and the outside of the loop reinforcing bars with the outer cleaner, so it is possible to reliably remove mat cake and slime. can. Furthermore, since the removed mud cake and slime do not fall into the stabilizing liquid, there is no re-adhesion of the mud cake or slime.

(Example) An example of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing a joint cleaner 10 showing an embodiment of the present invention, FIG. 2 is a plan view of an outer cleaner showing an embodiment of the present invention, and FIGS. 3 to 5 are A cross-sectional view of each position of the inner cleaner, FIG. 6 is an overall view of the cleaner. ...Here, the underground continuous wall joint cleaner 10 includes an outer cleaner 11 that cleans the U-shaped anchor reinforcing bars from the outside of the loop, an inner cleaner 12 that cleans the U-shaped anchor reinforcing bars from the inside of the loop, and the like. Here, outer cleaner 1
1, a large number of brushes 14 are installed on the inner surface of a protection plate 13 having a U-shaped cross section. Furthermore, guide protrusions 15, 15 are formed on both end faces of the U-shaped protection plate 13 for engaging with guide grooves 14 of the joint portion of the underground continuous wall. The inner cleaner 12 includes an outwardly protruding brush 16 for cleaning the inside of the U-shaped anchor reinforcing bars, and a suction port 17 for sucking up slime etc. removed from the anchor reinforcing bars.
Injection nozzles 18 and the like that eject water outward are arranged at different horizontal positions.

FIG. 3 is a cross-sectional view showing the brush portion of the inner cleaner 12. In the figure, the brush portion includes a frame 19 having a substantially U-shaped cross section, and a large number of brushes 16 protruding outward. When this brush part is inserted inside the anchor reinforcing bars of the joint part to be operated later, the brush 16 can rub the inside of the anchor reinforcing bars to remove attached slime and the like. FIG. 4 is a cross-sectional view showing the suction section of the inner cleaner. The suction section includes four suction ports 17 that expand outward, and the suction ports 17 communicate with a suction pipe 20 . The suction pipe 20 is connected to a suction pump (not shown), and can suction slime and mud cake in the stabilizing liquid. FIG. 5 is a cross-sectional view showing the injection nozzle portion of the inner cleaner. Here, the injection nozzle portion includes a pipe 21 formed in a substantially U-shape,
A large number of injection nozzles 1 are arranged on the outside of this pipe.
8 and a water supply pipe 22 that supplies clean water to the pipe.
It is composed of etc. Water supplied from a pump (not shown) can be sprayed outward from the spray nozzle 18.

The joint cleaner of the present invention constructed as described above is suspended along the inner and outer sides of the anchor reinforcing bars in the stabilizing liquid that is to form the subsequent element. Here, the outer cleaner 11 of the joint cleaner is lowered along the outer side of the loop portion of the anchor reinforcing bar, and the inner cleaner 12 is lowered along the inner side of the loop portion. The inner cleaner 12, which is divided into three stages, first removes slime and the like adhering to the inner side of the loop reinforcing bars using the brush 16 of the brush section. Next, the jet stream ejected from the injection nozzle 18 of the nozzle section removes slime and the like that could not be removed by the brush. The removed slime and the like are then suctioned by a suction pump from the suction port 17 of the suction section through the suction pipe 20. By sliding the vacuum cleaner from the top to the bottom of the joint, slime and mud cake attached to the anchor reinforcing bars can be removed.

(Effects of the invention) As explained in detail above, the cleaner for the joint part of an underground continuous wall according to the invention can clean the outside of the loop-shaped anchor reinforcing bars with the outside cleaner and also with the inside cleaner. Therefore, it can be cleaned reliably. In addition, the inner cleaner
Since it is composed of a brush part, a spray nozzle part, and a suction part, the slime etc. scraped off by the brush part and the jet nozzle part are sucked up by the suction part, so there is a risk that the scraped slime etc. will re-deposit. There is no such thing. Furthermore, since the outer cleaner is provided with the protective plate 13 having several stages of brushes, there is no fear that the groove walls will be destroyed by the jet stream ejected from the inner cleaner.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a joint vacuum cleaner showing an embodiment of the invention, Fig. 2 is a plan view of an outer cleaner showing an embodiment of the invention, and Fig. 3 is an embodiment of the invention. FIG. 4 is a cross-sectional view of the inlet portion of the inner cleaner showing an example of the present invention; FIG. 5 is a cross-sectional view of the inlet portion of the inner cleaner showing an embodiment of the present invention; FIG. FIG. 6 is an overall view of the cleaner, and FIGS. 7 and 8 are cross-sectional views of essential parts of an example of a conventional joint cleaner. 10... Joint vacuum cleaner, 11... Outer cleaner, 12... Inner cleaner, 13... Protective plate, 1
4... Brush, 15... Guide groove, 16... Brush, 17... Suction port, 18... Injection nozzle, 19
... Frame body, 20 ... Suction pipe, 21 ... Pipe, 2
2... Water supply pipe.

Claims (1)

[Scope of utility model registration request] When constructing a continuous underground wall, cleaning the U-shaped anchor reinforcing bars erected on the partition steel plate that is placed at the boundary between the leading wall and the trailing wall and partitioning the ends of the leading wall from the inside of the loop. a cleaner, and an outer cleaner that cleans the loop from the outside, and the inner cleaner includes an outwardly protruding brush, an injection nozzle that sprays water outward, and removes water from the anchor reinforcing bar, etc. A joint vacuum cleaner for an underground continuous wall, characterized in that the outer cleaner includes a wall body having a substantially U-shaped cross section and a plurality of brushes embedded therein, and a suction port for sucking slime.