JP2818844B2 - Underground continuous wall joint cleaning system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an openable / closable brush-equipped cleaning device that removes mud film adhering to the ground of a joint in an underground continuous wall construction method. It is.

"Conventional technology" Generally, an underground continuous wall is constructed as a foundation of a structure such as an earth retaining wall, a water blocking wall, an underground wall, an artificial island, and the like. Things have been implemented.

This is because, after dividing an underground continuous wall to be constructed into a plurality of elements, first, every other element is excavated by an excavator (hereinafter, these elements will be referred to as preceding elements), and the excavated deep trench Concrete is poured into the inside, then the remaining elements (hereinafter, referred to as following elements) are excavated by an excavator, and the concrete walls of the preceding element and the following element are cast by placing the concrete. The underground continuous wall that is connected and thus integrated is constructed in the ground.

By the way, in such an underground continuous wall, the joint method between the preceding elements may be a case where the horizontal streak is wrapped to secure structural integrity, and a case where the structural streak is not required, and the horizontal streak is not wrapped. is there.

FIG. 6 to FIG. 8 show an example in which such two types of joints are used together on the upper side and the lower side of the same continuous wall.
Reinforcing bar unit consisting of horizontal bars 2a and vertical bars 2b (joint bar)
Two or more are provided so as to protrude into the joint portion T, and the end surface 1a of the element is exposed directly below the preceding element. In FIG. 7, reference numeral 4 denotes a thin iron plate, and reference numeral 5 denotes a mud film adhered to the ground of the joint portion T.

"Problem to be Solved by the Invention" The present invention is to solve the following problem in the above-described conventional technology.

That is, when the two types of joints described above are used in combination at the top and bottom of the same continuous wall, the range H in which the drill can be lowered is limited to the reinforcing bar 2 of the upper joint as shown in FIG. Therefore, it is difficult to remove the drilling drill below the joint rebar 2 and it is difficult to remove the mud film adhering to the ground below the underground continuous wall. It is a task to be done.

The present invention has been proposed in view of the above circumstances, and an object thereof is to clean a joint portion of an underground continuous wall that can easily remove mud film adhering to the underground under the underground continuous wall. It is to provide a device.

Means for Solving the Problems In order to achieve the object, the present invention removes mud film suspended in a vertical joint between preceding elements constituting an underground continuous wall and attached to the ground of the joint. A main body portion suspended by a hanging wire, and supported on the left and right sides of the main body portion so as to be openable and closable up and down via a rotating shaft, and opened and closed by operation of an operation wire. An arm portion rotatably supported by the rotation shaft; and an end portion of the arm portion supported in parallel with the ground and ground. And a brush for removing the mud of the mountain.

[Operation] In the cleaning device according to the present invention, in order to remove mud film adhering to the underground in the joint portion, the main body of the cleaning device is suspended in the joint portion by a crane via a hanging wire, and the joint on the upper side of the element is removed. In a range where the reinforcing bar is present, the brush is passed in a closed state, and the operating wire is operated and opened in a range where there is no lower reinforcing bar, and the brush body is attached to the ground.

Next, in this state, if the mud film attached to the ground is rubbed with the brush body by moving the main body part up and down, the mud film of the ground is rubbed with the brush body and dropped to the groove bottom.

Embodiment An embodiment of the present invention will be described below with reference to FIG. 1 to FIG.

In these figures, reference numeral 10 denotes a main unit suspended by a crane via a suspension wire W1, and 11 denotes a left and right side of the main unit 10 rotatably supported via pivot shafts 11a and an operation wire W2. The brushes are opened and closed through a brush, and the reference numerals 10 and 11 constitute the main members of the cleaning device.

The main body 10 is a pair of front and rear pillars vertically extending vertically.
10a and an upper beam portion 10b connecting the upper ends of these pillars 10a are mainly constituted, and a rotating shaft 11a supporting a brush portion 11 is provided at a lower portion of the pillar 10a with an upper beam portion 10b. It is bridged in parallel and has a pillar 10a at the front (left part in Fig. 2).
Is provided with a guide portion 12 which engages with a guide rail 25 extending vertically of the joint portion to guide the body portion 10 up and down.
The guide portion 12 includes an arm portion 12b extending vertically from a side portion of the column body 10a via a bracket portion 12a, and a locking plate 12c attached so as to embrace the guide rail 25 on the left and right ends of the arm portion 12b. An engaging pin 12d that engages with the web portion 25a of the guide rail 25 is provided at the tip of the locking plate 12c.
The roller 12e is mounted between the rollers c and rolls on the front surface of the guide rail 25.

On the other hand, the upper beam portion 10b is provided with a mounting hole 10c for mounting the shackle 20 at the tip of the suspension wire W1, and a guide mechanism 15 serving as an introduction portion of the operation wire W2 of the brush portion 11 is mounted. This guide mechanism 15
A pair of left and right guide rollers 15b provided on the upper surface of the upper beam portion 10b via a first bracket 15a, and a pair of front and rear guide rollers provided on the lower surface of the upper beam portion 10b via a second bracket 15c. The guide roller 15d is mainly configured, and the operation wire W2 can be set by pulling up the operation wire W2 between the upper and lower guide rollers 15b and 15d through the operation wire W2 (third operation). See figure).

Next, the brush unit 11 removes the mud of the ground supported by the arm 11b rotatably supported by the rotation shaft 11a and supported at the tip of the arm 11b in parallel with the ground. Brush body
11c.

The arm portion 11b is supported at a substantially central portion by a rotating shaft 11a, and is attached to the arm portions of the left and right brush portions so as to be shifted back and forth so as not to interfere with each other. Note that a stopper plate 11h for horizontally supporting the arm 11b is provided on the base end side of the arm 11b.

On the other hand, as shown in FIG. 1, the brush body 11c is mainly composed of a support plate 11d vertically attached to the tip of the arm 11b and a nylon brush 11e planted on the outer surface of the support plate 11d. The size is set so that the nylon brush 11e can come into contact with the ground surface and scrape off the mud when the brush portion 11 is opened.

At the center of the support plate 11d of the brush body 11c, a bracket 11f serving as a mounting portion for the operation wire W2 is provided, and the operation wire W2 attached to the bracket 11f is provided.
The opening and closing of the brush body 11c is performed by the operation of.

Next, the operation of the cleaning device configured as described above will be described.

In order to remove the mud 5 on the ground at the joint T using this cleaning device, the main body 10 is suspended from the main hook of the crane via the suspension wire W1, and the operation wire W2
Is suspended on an auxiliary hook of the crane so that the brush portion 11 can be opened and closed by the operation wire W2.

Next, with the operation wire W2 tensioned and the brush portion 11 closed, the guide mechanism 12 is attached to the guide rail 15,
The main body 10 is suspended from the joint T. At this time, brush part 11
3 is closed as shown in FIG. 3 and has a reduced width, so that it can pass through this portion without being hindered by the reinforcing bar 2 of the joint portion, and can be lowered to the groove bottom.

When the entire device has descended to the bottom of the groove, the operation wire W2 is loosened, the brush portion 11 is opened, and the nylon brush 11e at the tip of the arm portion is brought into contact with the ground surface.

When the device is lifted by a crane with the nylon brush 11e opened, the mud film attached to the ground is scraped off and removed.

When scraping the mud film, the main body 11 is
Since the body 11 is guided up and down by 15, the body 11 does not swing and hinder the scraping of the mud by the nylon brush, and the mud can be reliably removed by the nylon brush 11 e.

By repeating the above operation two or three times, mud film adhering to the ground can be removed.

[Effects of the Invention] As described above, the present invention provides a cleaning device which is suspended in a vertical joint between preceding elements constituting an underground continuous wall and removes mud film attached to the ground of the joint. And a pair of a left and right main body suspended by a hanging wire, and left and right of the main body, each of which is supported to be openable and closable up and down through a rotating shaft and operated up and down by operation of an operation wire. An arm portion rotatably supported on the rotating shaft, and a mud film supported parallel to the ground at the tip of the arm portion. It is characterized by being composed of a brush body to be removed, so even if there is a joint reinforcing bar at the top of the element, mud film adhering to the ground of the joint part can be reliably removed and excavation Effective wall thickness full width It has an excellent effect that it is possible to secure

[Brief description of the drawings]

1 to 5 show an embodiment of the joint cleaning apparatus for an underground continuous wall according to the present invention. FIG. 1 is a plan view thereof, FIG. 2 is a front view thereof, and FIGS. FIG. 4 is a side view for explaining the operation, FIG. 5 is an enlarged front view of a portion indicated by a chain line V circle in FIG. 3, and FIGS. 6 to 8 are for explaining the prior art. 6 is a sectional view of the joint portion, FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6, and FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 10 Body part, 11 Brush part, W1 Hanging wire, W2 Operation wire, 12 Guide part, 15 Guide mechanism.

Continuation of the front page (56) References JP-A 57-38839 (JP, U) JP-A 57-38890 (JP, U) JP-A 3-112924 (JP, U) (58) Fields surveyed (Int) .Cl. ⁶ , DB name) E02D 5/18-5/20

Claims (1)

(57) [Claims] 1. A cleaning device which is suspended in a vertical joint between preceding elements constituting an underground continuous wall and removes mud film adhered to the ground of the joint, wherein the cleaning device is suspended by a suspension wire. Main body portion, comprising a pair of left and right brush portions which are supported on the left and right sides of the main body portion so as to be openable and closable up and down via a rotating shaft, respectively, and which can be opened and closed up and down by operating an operation wire, The brush portion includes an arm portion rotatably supported by the rotation shaft, and a brush body supported at a tip of the arm portion in parallel with the ground and removing mud film of the ground. An apparatus for cleaning a joint of an underground continuous wall.