JP2657945B2 - Joint cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint washing apparatus for washing a vertical joint between a preceding wall and a following wall in underground continuous wall construction.

[0002]

2. Description of the Related Art When constructing an underground continuous wall having a vertical joint structure, concrete is poured into a preceding wall, and then concrete is poured into a succeeding wall. A step of washing impurities such as mud and slime adhering to reinforcing bars in a stabilizing solution is required.

Conventionally, the above-mentioned cleaning method includes cleaning by hard brush or jet water jet.
When the brush cleaning and the water jet cleaning are performed independently, there is a problem that a sufficient cleaning effect cannot be expected and the cleaning efficiency is poor.

[0004] Therefore, a joint washing device using both a brush and a water jet has been proposed. The joint washing device combining the brush and the water jet is suspended by a crane or the like on a vertical joint portion of an underground continuous wall. In general, impurities such as mud and slime adhered to a partition plate, a reinforcing bar and the like of a vertical joint portion are moved up and down to wash impurities.

[0005] In a joint washing apparatus using both a brush and a water jet, if a protective plate is not provided on the groove wall side of the vertical joint, the groove wall is cut by jet water. For this reason, there has been proposed a joint washing apparatus in which a pair of guard plates are arranged so as to cover both sides of the washing section (Japanese Utility Model Publication No. 63-305).
No. 39).

[0006]

However, in the above-mentioned conventional joint cleaning apparatus, as shown in FIG. 7, a DC injection nozzle 102 having only a circular hole in its jet pipe is used. In addition, the horizontal streak 61 and the vertical streak 62 of the vertical joint portion are left unwashed during washing. Therefore, the unwashed portion is arranged to be washed with a brush.

[0007] However, there is a problem in that the brush requires maintenance work such as replacement due to wear, and is expensive. Also, the brush has a problem that the resistance from the reinforcing cage built in the excavation groove is large at the time of cleaning, and the vertical movement of the joint cleaning device is not smooth, especially the joint cleaning device is difficult to descend due to the resistance of the brush. In some cases, it was necessary to add weights.

Therefore, it is conceivable to arrange the nozzles densely by reducing the amount of brushes. However, this causes a new problem that the cost increases.

Further, in the joint washing apparatus provided with the guard plate, the guard plate is fixed. However, due to the improvement of construction accuracy, the underground continuous wall is also used for the construction of the main body underground structure wall and wall pile, etc., and its application range is wide, and the underground continuous wall of various wall thickness is constructed. However, the above-described conventional joint cleaning apparatus has a problem that it cannot cope with various wall thicknesses.

SUMMARY OF THE INVENTION An object of the present invention is to provide a low-cost joint which has a sufficient cleaning ability, does not require maintenance, can smoothly perform operations such as up and down movement in a digging groove. A cleaning device is provided. Another object of the present invention is to provide a joint washing apparatus that can cope with various wall thicknesses.

[0011]

In order to achieve the above object, a joint washing apparatus according to the present invention has a jet pipe provided with a plurality of fan-shaped spray nozzles. A plurality of spray nozzles are arranged outward at predetermined intervals in the side cleaning fan-shaped spray nozzle section, and the front cleaning fan-shaped spray nozzle section comprises a plurality of spray nozzles. In the injection nozzle portion, a plurality of fan-shaped injection nozzles are arranged in the vertical direction and at different injection directions and injection angles, and in the plurality of fan-shaped injection nozzles of the front cleaning fan-shaped injection nozzle portion, The spray angle of at least a part of the nozzle in a plan view is different from that of another fan-shaped spray nozzle in a plan view.

Further, in the joint cleaning apparatus according to the present invention, the pair of guard plates can be adjusted to expand and contract by a crank mechanism.

Further, a water flow control section is provided at the front end of each of the pair of guard plates on the leading wall side.

[0014] In addition, the fan-shaped spray nozzle for front cleaning includes:
At least one pair of fan-shaped spray nozzles are arranged toward the water flow control unit, and the spray ports are vertically arranged.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 and 2, a plurality of hanging jigs 41 are provided on a main body frame 4 of the joint cleaning apparatus 1 for applying a crane wire (not shown). The front side (the left side in FIG. 2) of the main body frame 4 is the washing unit 2, and the rear side (the right side in FIG. 2) is the jet water pressurizing unit 3. A submersible pump 31 is provided in the jet water pressurizing section 3, and the bottom of the submersible pump 31 is a suction port 311 for sucking the stable liquid filled in the excavation groove, and the water pipe 32 is provided at the top.
Is connected.

The water pipe 32 is continuous with the jet pipe 21 in the washing section 2. The jet pipe 21 is formed by a horizontal pipe section 21 formed in parallel with the lower portion of the main body frame 4.
1 and a vertical cylindrical vertical pipe portion 212 which communicates with the horizontal pipe portion 211 and is located at the distal end thereof. In the jet pipe 21, a plurality of fan-shaped injection nozzles 211a, 212a to 212e for jetting jet water are arranged.

The horizontal pipe section 211 of the jet pipe 21
Are provided on both sides of the fan-shaped spray nozzle 211a, which is a fan-shaped spray nozzle for side cleaning for cleaning the side of the vertical joint portion mainly corresponding to the groove wall D side, at predetermined intervals in the lateral direction, and protrude therefrom. And it is arranged. This fan-shaped injection nozzle 211
“a” jets the jet water outward toward the groove wall side. As shown in FIG. 5A, the fan-shaped injection nozzle 211a
Has a fan shape whose jet shape is a fan shape in a plan view, and as shown in FIGS.
11ah is formed in a long hole shape. Fan-shaped spray nozzle 21
The long diameter of the long hole-shaped injection port 211ah of 1a is provided so as to be located in the horizontal direction, that is, horizontally, and the injection angle is set as shown in FIG. 4 and FIG. Are set so that the outer trajectories of the jet jet water jetted from the fan-shaped jet nozzle 211a provided near the horizontal streak 61 as shown in FIG. In the experimental example,
It has been found that it is preferable to set the injection angle to 90 ° in relation to the distance between the nozzle tip and the horizontal streak 61 and the distance between the nozzles. In addition, the fan-shaped injection nozzle 21
1a is an injection area (spray pattern) shown in FIG.
The fan-shaped jet water having a uniform flow distribution over the entire area is generated, and has a characteristic that the hitting force per unit area is uniform. Further, in this embodiment, if the tip of the fan-shaped injection nozzle 211a is provided to be inclined downward, the lowermost reinforcing bars 61, 62 of the vertical joint portion 6 are attached when the joint washing device 1 is lowered and landed. Is also effective because it can be sufficiently washed.

4 and 6, the jet pipe 21
On the front side of the vertical pipe part 212 located at the tip of the fan-shaped injection nozzles 212a to 212e having substantially the same shape as the fan-shaped injection nozzles 211a provided on the horizontal pipe part 211, two or three sets are formed. The sets are provided at predetermined intervals in four vertical stages. The fan-shaped spray nozzles 212a to 212e are front-washing fan-shaped spray nozzles for mainly cleaning the front of a vertical joint portion that faces the side of the partition plate 63 and the like. The pipe portion 212 is arranged so as to radially open in a radial direction of the pipe portion 212 so as to face a different direction for each vertical step.

A pair of fan-shaped injection nozzles 21 at the first stage from the top
2a is a T-shaped guide 6 projecting from the partition 63 of the preceding wall A.
In order to clean the vicinity of 5, it is provided to be bent inward. As shown in FIG. 6, the fan-shaped injection nozzle 212a has a long hole-shaped injection port 212ah provided horizontally, and in the experimental example, it is preferable to set the fan-shaped injection angle to 50 ° in plan view. There was found.

A pair of fan-shaped injection nozzles 21 at the second stage from the top
2b is disposed toward the front end of the guard plate 5, and is provided such that its long hole-shaped injection port 212bh is vertically arranged, and is a linear section rather than other fan-shaped injection nozzles 212a, c, d, and e. Is formed to protrude long. The fan-shaped injection nozzle 212b is located at the most deep place near both ends of the partition plate 63 in FIG. 4, particularly, the outer surface on the groove wall side of the flange plate 64 protruding from the partition plate 63 to which the jet water is difficult to reach and the outside thereof. It is a nozzle for cleaning the horizontal streak 61 overlapping the side surface. In order to enhance the reflection effect of the jet water by the guard plate 5, the elongated hole 212bh is vertically arranged. In the experimental example, it was found that it is preferable to set the fan-shaped spray angle to 15 ° (vertical direction) in a side view.

In the third row from the top, a pair of fan-shaped injection nozzles 212c are provided such that the elongated injection ports 212ch are placed horizontally. In the fourth row from the top, two sector injection nozzles 212d and one sector injection nozzle 212e are provided.
The slot-shaped injection ports 212dh and 212eh are provided so as to be placed horizontally.

The third stage fan-shaped spray nozzle 212
c, the fourth stage fan-shaped injection nozzle 212e is
The central portion of 3, the fourth stage fan-shaped injection nozzle 212d is a nozzle for cleaning the horizontal streak 61 and the vertical streak 62 (in this case, 212d also cleans a part of the partition plate 63). In the experimental example, the same angle as 50 ° which is the injection angle of the pair of fan-shaped injection nozzles 212a in the first stage, that is, the fan-shaped injection angles of the fan-shaped injection nozzles 212c and 212e are 50 ° in plan view.
Has been found to be preferable. Further, it has been found that the fan-shaped spray angle of the fan-shaped spray nozzle 212d is preferably wider than the spray angle of the pair of fan-shaped spray nozzles 212a in the first stage, that is, set to 90 ° in plan view.

As shown in FIG.
c and 212e are provided below the center line of the horizontal pipe portion 211 so that the bottom of the partition plate 63 can be cleaned when the joint cleaning device 1 has landed in the excavation groove. In addition, when it is not provided in the lower part, the injection nozzle may be provided to be inclined downward.

As described above, the fan-shaped injection nozzles 212a, b, c, d, and e provided in the vertical pipe portion 212 are set to have different injection angles, and are provided in multiple stages in the vertical direction. The injection direction is different. And
The fan-shaped injection nozzles 212a, 212b, 212c, and 212e are provided with the injection angles of the fan-shaped injection nozzle 211a
It is set narrower than. This is because, as shown in FIG. 4, in the vicinity of the partition plate 63 of the vertical joint portion 6, the distance from the object to be cleaned is different for each injection nozzle, and the shape is complicated and complicated. This is because the nozzles are arranged effectively so that the nozzles can be sufficiently cleaned, and the horizontal streak 61 and the vertical streak 62 are cleaned with respect to the vertical joint portions 6 on both sides of the horizontal pipe portion 211. This is because the cleaning can be sufficiently performed only by the jet water jetted from the fan-shaped jet nozzle 211a without using a brush.

As described above, in the experiment using the joint washing apparatus 1 of this embodiment, the fan-shaped spray nozzles 211a of the horizontal pipe 211 and the fan-shaped spray nozzles 212a, 212a of the vertical pipe 212 are used without using a cleaning brush. b, c,
It has been found that the vertical joint 6 can be cleaned by d and e.

The joint cleaning apparatus 1 is provided with a pair of guard plates 5 and 5 facing each other so as to cover both sides of the cleaning section 2. The guard plate 5 is provided on the main body frame 4 via the crank mechanism 51 as shown in FIG. 3 so that the guard plate 5 can cope with the groove width of the excavation groove C for constructing an underground continuous wall having a wall thickness of 800 mm to 1500 mm. In addition, the expansion and contraction can be adjusted. The crank mechanism 51 includes a crank 511 and a crank shaft 512, and sets the guard plate 5 at a slightly smaller interval than the groove width of the excavation groove C of the underground continuous wall to be constructed, which is not shown. It is fixed to the main body frame 4 by a fixing plate or the like.

The guard plate 5 has a fan-shaped injection nozzle 21
1a, 212a to 212e to prevent jet water jets from cutting down the groove wall D, and also have a function of reflecting the jet water jets. Between the horizontal stripe 61 and the vertical stripe 62 can be more effectively cleaned. Although the guard plate 5 of the present embodiment has the flat inner surface on the cleaning portion side, the cleaning effect can be further enhanced if the guard plate 5 is formed with a corrugated surface. The guard plate 5 of the joint cleaning device 1 according to the present embodiment has a vertical width that covers almost the entire cleaning unit 2 and the jet water pressurizing unit 3 as shown in FIG. If the vertical width is reduced, for example, by about １ ／ within a range that does not impair the barrier effect, the weight of the joint cleaning device 1 can be reduced. Also in this case, the guard plate 5
Of the washing unit 2, especially the fan-shaped spray nozzles 211 a, 212 a to
e to cover both sides.

In the joint washing apparatus 1 of this embodiment shown in FIG. 1, the gap between the guard plates 5 and 5 is set so as to correspond to the wall thickness of 800 mm (groove width of the excavation groove). In order to correspond to a wall thickness larger than this wall thickness, the interval between the guard plates 5 and 5 is set to be slightly smaller than the groove width of the excavation groove, so that it is wider than that shown in FIG. In this case as well, the distance between the guard plate 5 and the horizontal streak 61 and the vertical streak 62 of the vertical joint portion 6 is generally the same as that in the case of a narrow wall thickness.
The distance between the vertical joints 1a and 212b and the vertical joint portion 6 composed of the horizontal streaks 61 and the vertical streaks 62 and the like may be increased, which may affect the detergency. Therefore, in this case, sufficient cleaning power can be maintained by taking measures such as extending the fan-shaped injection nozzles 211a, 212b, and 212d outward and increasing the water pressure of the jet water.

The guard plate 5 is provided with a water flow control section 52 which is inclined toward the washing section 2 at the front end on the leading wall side. As shown in FIGS. 4 and 6, the water flow control unit 52 may be an inclined plate, but the front end of the guard plate 5 is formed to have a special thickness, and the inner surface of the cleaning unit 2 side is formed as an inclined surface or It may be formed into a curved surface. Water flow control unit 52
Is effective in preventing the jet water jetted from the fan-shaped jet nozzle 212b provided in the vertical pipe portion 212 of the jet pipe 21 from going around the outside of the guard plate 5, and enhancing the cleaning effect by the fan-shaped jet nozzle 212b. In addition, it is possible to prevent the groove wall D from being cut off.

As shown in FIGS. 1 and 2, a contact preventing brush 53 for preventing the guard plate 5 from contacting the partition plate 63 of the preceding wall A is provided substantially at the center of the front end of the guard plate 5. It is provided. This contact prevention brush 53
May be replaced with an elastic roller (for example, made of rubber or soft synthetic resin).

On the inner surfaces of the pair of guard plates 5 and 5 near the front ends, inward brushes 54 and
54 are provided. As described above, the joint cleaning apparatus 1 according to the present invention has been found in experiments to be able to clean the vertical joint portion 6 by a fan-shaped injection nozzle, but the brush 54 is provided as shown in this embodiment. This is more effective for cleaning a part of the flange plate 64, the horizontal streaks 61 and the vertical streaks 62 in the working process.

At the front end of the body frame 4, there is provided a guide roller 43 for guiding the vertical movement of the joint washing device 1 and engaging with a T-shaped guide 65 for taking a reaction force of the jet water. Note that the guard plate 5 is not indispensable when the vertical joint portion 6 is provided with a protection plate (not shown) on the groove wall side.

Next, the operation of the joint cleaning device 1 and the cleaning operation using the joint cleaning device 1 will be described.

In FIG. 1, a horizontal streak 61 is formed in the vertical joint portion 6 of the preceding wall A by passing through the partition plate 63 from the inside of the preceding wall A.
Are extended, and a vertical streak 62 is built in contact with the horizontal streak 61 to form a cross-girder joint.

First, the joint cleaning device 1 is suspended by hanging a wire of a crane on the suspension jig 41 of the main body frame 4, and the trailing wall excavation in which the stabilizing liquid near the vertical joint portion 6 of the preceding wall A is filled. It is lowered into the groove C. At this time, the horizontal streak 61 and the vertical streak 62 of the vertical joint 6 are positioned between the cleaning section 2 of the joint cleaning apparatus 1 and the guard plate 5, and the guard plate 5
The contact prevention brush 53 at the front end is brought into contact with the partition plate 63, and the joint cleaning device 1 is gradually lowered in the stable liquid in the trailing wall excavation groove C along the T-shaped guide 65 of the partition plate 63. .

Next, the submerged pump 31 is operated to jet the jet water from the jet nozzle through the jet pipe 21. At this time, since the fan-shaped injection nozzles 211a are arranged outward at optimal intervals on both sides of the horizontal pipe portion 211 of the jet pipe 21, as shown in FIG. 4, the fan-shaped injection nozzles 211a are injected from the fan-shaped injection nozzles 211a. The jet jet water hits the horizontal streak 61 and the vertical streak 62 of the vertical joint 6 without any gap, and the mud attached to the horizontal streak 61 and the vertical streak 62.
Impurities such as slime can be washed away. Also,
Since the jet water is reflected by the guard plate 5 to generate a reflected flow, impurities such as mud and slime adhered to the outside of the horizontal streaks 61 and the vertical streaks 62 can be sufficiently washed away. Vertical pipe part 21 at the tip of jet pipe 21
The jet water jets jetted from the fan-shaped jet nozzles 212a to 212e disposed in the center 2 wash the front side of the vertical joint portion 6 around the partition plate 63 as a center.

After the joint washing device 1 is lowered to the bottom of the vertical joint 6, jet water is ejected in the same manner as described above while being raised. In an experiment using the joint cleaning apparatus 1 of the present embodiment, it was found that an almost complete cleaning effect can be obtained by vertically reciprocating the vertical joint 6 two times.

As described above, the joint washing apparatus 1 of the present embodiment is
The vertical joint portion 6 is washed by jet water jetting. When the joint washing device 1 is moved up and down in the stabilizing liquid, there is no resistance from the built-in rebar by the washing brush and the descent or rise is extremely reduced. It can be done smoothly.

As described above, the guard plate 5 can be expanded and contracted via the crank mechanism 51, and before the cleaning operation, the guard plate 5 is made to have a thickness greater than the wall thickness of the underground continuous wall to be constructed. Are also set at slightly narrower intervals.

[0041]

As described above, according to the present invention,
A jet-shaped jet nozzle that jets jet water in a fan shape at a predetermined jet angle and cleans the side and front of the vertical joint is provided in the jet pipe at different jet angles and jet directions, The vertical joint can be cleaned by water injection from the injection nozzle. In addition, the joint washing device of the present invention can smoothly perform operations such as up and down movement in a digging groove, has a sufficient washing ability even for a vertical joint portion having various shapes, and has a maintenance function. It saves time and costs.

Further, since the guard plate is adjustable in width by the crank mechanism, it is possible to cope with various wall thicknesses.

Further, since the water flow control section is provided at the front end of the guard plate on the leading wall side, the jet water jetted from the fan-shaped spray nozzle of the front cleaning fan-shaped spray nozzle section is
It is effective to prevent the sneaking around the guard plate, enhance the cleaning effect by the fan-shaped spray nozzle, and prevent the groove wall from being cut off.

Further, since the injection port of the fan-shaped injection nozzle provided to the water flow control section of the guard plate is vertically arranged, the reflection effect of the jet water by the guard plate is enhanced, and the front side of the vertical joint is deepened. It is even more effective for cleaning the places where it has fallen.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of a joint cleaning apparatus according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a right side view of the same.

FIG. 4 is an enlarged plan view showing a conceptual ejection state of an ejection nozzle.

5 (a) is a partial plan view showing the ejection state of the ejection nozzle, FIG. 5 (b) is a front perspective view showing the ejection port of the ejection nozzle, and FIG. 5 (c) is a side view thereof. FIG.

FIG. 6 is a partially enlarged perspective view of one embodiment of the joint cleaning apparatus according to the present invention.

FIG. 7 is a partial plan view showing an injection state of a conventional joint cleaning device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Joint washing | cleaning apparatus 2 Cleaning part 21 Jet pipe 211 Horizontal pipe part 212 Vertical pipe part 211a Sector-shaped spray nozzle for side washing (sector-shaped spray nozzle of a horizontal pipe part) 212a-e Sector-shaped spray nozzle for front washing (sector of a vertical pipe part) 3 Jet pressure unit 31 Submersible pump 5 Guard plate 51 Crank mechanism 52 Water flow control unit 6 Vertical joint A Leading wall B Trailing wall

 ──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000150615 Haseko Corporation 2-32-1 Shiba, Minato-ku, Tokyo (72) Inventor Hisashi Nemoto 3-12-8 Shibaura, Minato-ku, Tokyo Ken Ando (72) Inventor Atsushi Ishiyama 5-27-4 Asaya, Suginami-ku, Tokyo (56) References Japanese Utility Model Application Sho 61-176131 (JP, U) Japanese Patent Publication No. 5-51727 (JP, B2) JP 61-38987 (JP, Y2)

Claims (5)

(57) [Claims] 1. A washing section comprising a jet pipe which moves up and down along a vertical joint section between a leading wall and a trailing wall of an underground continuous wall and injects jet jet water forward and on both sides thereof. A jet water pressurizing unit having a submersible pump for supplying jet water to the jet pipe; and a pair of guard plates disposed so as to cover both sides of the washing unit. In the underground continuous wall joint cleaning device for cleaning a vertical joint portion before installation, a plurality of fan-shaped spray nozzles are arranged on the jet pipe, and the fan-shaped spray nozzle is a side-cleaning fan-shaped spray nozzle portion. And a front cleaning fan-shaped spray nozzle. The side cleaning fan-shaped spray nozzle includes a plurality of spray nozzles.
Are arranged outward at predetermined intervals, and a plurality of fan-shaped jets are
Move the nozzle vertically and with different spraying direction and angle.
Yes disposed Te, the plurality of fan-shaped jet of the front cleaning fan jet nozzle unit
In the nozzle, at least a part of this sector injection nozzle
The spray angle of the fan-shaped spray nozzle in plan view is
Including a configuration in which the injection angle differs from the injection angle in plan view
Joint cleaning device according to claim no possible. 2. A washing section comprising a jet pipe which moves up and down along a vertical joint section between a leading wall and a trailing wall of an underground continuous wall, and jets jet water to the front and both sides thereof. A jet water pressurizing unit having a submersible pump for supplying jet water to the jet pipe; and a pair of guard plates disposed so as to cover both sides of the washing unit. An underground continuous wall joint cleaning apparatus for cleaning a vertical joint section before installation, wherein the pair of guard plates can be adjusted to expand and contract by a crank mechanism. 3. The joint cleaning device according to claim 1, wherein the pair of guard plates can be adjusted to expand and contract by a crank mechanism. 4. In any one of claims 1 to 3, the joint washing apparatus characterized by is provided with a water flow control unit in the front end portion of each of the preceding wall side of the pair of guard plates. 5. The fan-shaped spray nozzle for front cleaning according to any one of claims 1 to 4, wherein a water flow control unit is provided at a front end of each of the pair of guard plates on the leading wall side. , At least a pair of fan-shaped spray nozzles are arranged toward the water flow control unit, and each of the pair of fan-shaped spray nozzles has a vertically arranged spray port.