Formed bag concrete surface vibrating apparatus and method of use

Abstract

The present application relates to a mould bag concrete surface vibrating device and a using method, comprising: a track part; the track part is arranged on the horizontal ground adjacent to the slope; a moving winch part; the moving winch part is slidably arranged on the track part; a vibrating part; the vibrating part can be arranged on the mould bag concrete of the slope for vibrating work, and the vibrating part is connected with the moving winch part through a steel wire rope; the moving winch part is transversely moved on the track part, so that the moving winch part pulls the vibrating part in a vibrating state through the steel wire rope to transversely vibrate the inner concrete in the earthwork mould bag, the steel wire rope is retracted or pulled to vertically vibrate the inner concrete in the earthwork mould bag by the rotating work of the moving winch part in two directions, the vibrating part can vibrate the mould bag concrete in a large range and multiple positions on the slope, and the inefficient vibrating by manual operation is avoided.

Description

Technical Field

[0001] This invention relates to the field of building technology, specifically to a vibratory compaction device for concrete surface in formwork bags and its usage method. Background Technology

[0002] Molded bag concrete is a protective structure formed by filling a continuous (or separate) bag-shaped body made of double-layer high-strength woven chemical fiber fabric as a flexible template with concrete by a high-pressure pump. It can be used as an earth-rock dam, embankment slope protection, and revetment and bottom protection for rivers, lakes, and coastlines.

[0003] Because geotextile bags are relatively long and are mostly used in scenarios such as embankments and revetments, the construction of geotextile bags is often very long, and most of the geotextile bags are underwater. This makes it difficult to fully vibrate the concrete during the pouring process, so only self-compacting concrete or manual vibration can be used. This results in high costs and construction difficulties, which seriously affects construction efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the technical problem of poor vibration method of concrete surface in existing technology, and to provide a vibration device and method for using concrete surface in a mold bag.

[0005] The technical solution adopted by this invention to solve its technical problem is: a vibratory compaction device for concrete surface in a formwork bag and a method of using it, including:

[0006] Track section; the track section is set on the horizontal ground adjacent to the slope;

[0007] A movable winch section; the movable winch section is slidably mounted on the track section;

[0008] Vibration unit; the vibration unit can be set on the formwork concrete on the slope for vibration work, and the vibration unit is connected to the movable winch unit by a steel wire rope;

[0009] When the movable winch is moved along the track, the movable winch can pull the vibrating section to horizontally vibrate the concrete in the formwork bag via a wire rope;

[0010] Rotating the movable winch allows the vibrating section to be pulled up and down repeatedly to vibrate the concrete in the formwork bag via a steel wire rope.

[0011] Furthermore, the vibrating section includes two lifting lugs connected to one end of the two wire ropes, two fixed columns set on the two lifting lugs, two rotating drums rotatably set on the outside of the two fixed columns, and belt rings set on the outside of the two rotating drums;

[0012] The inner wall of the belt ring and the outer wall of the drum are both provided with anti-slip teeth, and the anti-slip teeth at the two positions are in contact with each other.

[0013] When the mobile winch part pulls the lifting lug through the steel wire rope, the movement of the two fixed columns can drive the belt loop to rub the bagged concrete to rotate through the two rotating cylinders.

[0014] Furthermore, the vibrating part further includes a connecting rod arranged on the fixed column, a covered sealed box body arranged on the connecting rod and inside the belt loop, two vibration motors with power storage functions arranged near the inner side of the covered sealed box body, and a counterweight part arranged at the middle position of the covered sealed box body.

[0015] Furthermore, the counterweight part includes a metal frame arranged at the inner bottom end of the covered sealed box body, and a plurality of counterweight blocks arranged inside the metal frame;

[0016] At least one side of the plurality of counterweight blocks is in contact with the inner wall of the metal frame, and the sides of adjacent two counterweight blocks are in contact with each other.

[0017] Furthermore, the mobile winch part includes a movable trolley slidably arranged on the track part, two groups of vertical rods arranged on the movable trolley, a winding roller rotatably arranged between the two groups of vertical rods through a connecting shaft, and a plurality of annular grooves arranged outside the winding roller;

[0018] The plurality of annular grooves can selectively connect the other ends of the two steel wire ropes;

[0019] The connecting shaft can be connected to a handle or a driving motor.

[0020] Furthermore, the track part includes two fixed tracks arranged in a straight line and bolted to the horizontal ground adjacent to the slope, and a convex rod arranged on the fixed tracks;

[0021] The lower end of the movable trolley is provided with wheels, and the wheels are provided with annular grooves, and the annular grooves can be combined with the convex rod.

[0022] Furthermore, the track part further includes a T-shaped groove arranged on the fixed tracks;

[0023] The lower end of the movable trolley is provided with a T-shaped rod, and the T-shaped rod can be slidably inserted into the T-shaped groove, where

[0024] When the movable trolley moves, the T-shaped rod can slide and move along the T-shaped groove.

[0025] Furthermore, the track part further includes two grooves arranged on one side of the two fixed tracks, two fixed shafts respectively arranged at the central positions of the two grooves, and a support connecting rod rotatably connecting the two fixed shafts and inserted into the two grooves,

[0026] Each of the four corners of the fixed track is set with a chamfer angle, wherein;

[0027] Rotating one of the fixed tracks causes the support link to rotate, and one of the fixed tracks can switch to assemble the two ends of the other fixed track.

[0028] Furthermore, the upper and lower ends of the supporting link are provided with several supporting rigid bodies;

[0029] Several of the supporting rigid bodies respectively fit into the upper and lower walls of the groove.

[0030] Furthermore, the method of use includes the following steps:

[0031] S1. Install the track section perpendicular to the slope direction, slide the movable winch section on the track section, connect the vibrating section and the movable winch section with a steel wire rope, and keep the vibrating section on the geotextile bag.

[0032] S3. Pour concrete into the geotextile bag. After this work is completed or when the flow of concrete in the geotextile bag is obstructed, push the moving winch horizontally to move the vibrating unit along the geotextile bag by the wire rope. Rotate the moving winch to move the vibrating unit vertically along the geotextile bag by the wire rope. At the same time, start the vibrating unit to drive it to vibrate along a fixed trajectory or to a designated location.

[0033] S3. Repeat the vibration operation until the concrete pouring of the geotextile bag is completed, or until the full range of vibration operations after the pouring is completed.

[0034] The beneficial effects of this invention are that, by moving the winch section laterally on the track section, the winch section pulls the vibrating section, which is in a vibrating state, laterally to vibrate the inner concrete inside the geotextile bag via a steel wire rope. By rotating the winch section in both forward and reverse directions, the steel wire rope is raised and lowered to pull the vibrating section, which is in a vibrating state, vertically to vibrate the inner concrete inside the geotextile bag. This allows the vibrating section to vibrate the concrete in the geotextile bag over a large area and at multiple locations on the slope, avoiding the inefficient vibration of purely manual operation. This also ensures that the grouting operation of the geotextile bag is not hindered, resulting in a dense surface of the concrete in the geotextile bag on the slope. Attached Figure Description

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] Figure 1 This is a perspective view of a preferred embodiment of the present invention;

[0037] Figure 2 This is a partial perspective view of a preferred embodiment of the present invention;

[0038] Figure 3 This is a perspective view of the connection between the track section and the movable winch section of the present invention;

[0039] Figure 4 This is the invention Figure 3 Partial 3D view;

[0040] Figure 5 This is the invention Figure 3 Enlarged view of point A in the middle;

[0041] Figure 6 This is a front view of the vibrating section of the present invention;

[0042] Figure 7 This is a top view of the sealed box with the lid of the present invention in the open state;

[0043] Figure 8 This is a schematic diagram of the rotating state of the track section of the present invention.

[0044] In the picture:

[0045] 1. Track section; 11. Fixed track; 12. Convex rod; 13. T-groove; 14. Groove; 15. Fixed shaft; 16. Support connecting rod; 161. Support rigid body; 2. Moving winch section; 21. Movable trolley; 211. Wheel; 212. Circular groove; 22. Upright pole; 23. Rewinding roller; 24. Circular groove; 25. Connecting shaft; 3. Vibration section; 31. Lifting lug; 32. Fixed column; 33. Rotary drum; 34. Belt ring; 35. Connecting rod; 36. Sealed box with cover; 37. Vibration motor; 38. Counterweight section; 381. Metal frame; 382. Counterweight block; 4. Steel wire rope. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0047] Example 1

[0048] like Figure 1 , 6 As described in section 7, the present invention provides a vibratory compaction device for the surface of geotextile concrete and a method for using it, including:

[0049] Track section 1; the track section 1 is set on the horizontal ground adjacent to the slope; the track section 1 is fixed by bolts, providing a supporting carrier for the movement of the device;

[0050] The movable winch section 2 is slidably mounted on the track section 1. The movable winch section 2 can rotate clockwise and counterclockwise to allow the wire rope 4 to be wound up and unwound.

[0051] Vibration section 3; the vibration section 3 can be set on the concrete bag on the slope for vibration work, and the vibration section 3 is connected to the mobile winch section 2 by steel wire rope 4; the vibration section 3 can be connected to an external power source or used for power storage.

[0052] When the movable winch section 2 is pushed along the track section 1, the movable winch section 2 can pull the vibrating section 3 to horizontally vibrate the concrete in the formwork bag via the wire rope 4;

[0053] Rotating the movable winch 2 allows the vibrating section 3 to be pulled back and forth by the steel wire rope 4, vibrating the concrete in the geotextile bag. Specifically, the invention utilizes the lateral movement of the movable winch 2 on the track 1 to pull the vibrating section 3 horizontally through the steel wire rope 4, vibrating the inner concrete inside the geotextile bag. Rotation of the movable winch 2 in both forward and reverse directions allows the steel wire rope 4 to be extended and retracted, vertically vibrating the inner concrete inside the geotextile bag. This allows the vibrating section 3 to vibrate the concrete in the geotextile bag over a wide area and at multiple locations on the slope, avoiding the inefficient manual vibration and ensuring unimpeded grouting of the geotextile bag. This results in a denser surface of the concrete in the geotextile bag on the slope. Furthermore, when the concrete in the geotextile bag is partially underwater on the slope, divers can operate the vibrating section 3 to move in various directions to vibrate deeper layers of the concrete, thus solving the construction problems of geotextile bag concrete. The problem of insufficient vibration and underwater vibration in geotextile concrete is addressed by using surface vibration technology for geotextile bags. This reduces the material and mix proportion requirements for geotextile bag concrete. In one embodiment, geotextile bags are laid on a slope, and concrete is poured in. During filling, one person holds the pump hose to prevent excessive swaying and monitors the concrete pressure at the inlet. When the concrete pressure at that point continues to rise, it indicates that the concrete flow in the geotextile bag is slowing down. At this time, the filling speed of the pump truck should be appropriately reduced. Then, the track section 1, the moving winch section 2, the vibrator section 3, and the wire rope 4 are installed in sequence. When it is found that the concrete flow in the geotextile bag is obstructed, the position of the moving winch section 2 on the track section 1 is adjusted, and the moving winch section 2 is rotated to lower the wire rope 4, so that the vibrator section 3 is in a suitable position on the geotextile bag concrete. The vibrator section 3 is turned on, and the wire rope 4 is adjusted to move the vibrator section 3 on the geotextile bag concrete. The moving winch section 2 is rotated to lower the wire rope 4 to move the vibrator to a suitable position. The vibration operation is repeated until the concrete pouring is completed.

[0054] Furthermore, the vibrating section 3 includes two lifting lugs 31 connected to one end of the two steel wire ropes 4, two fixed columns 32 disposed on the two lifting lugs 31, two rotating drums 33 rotatably disposed outside the two fixed columns 32, and belt rings 34 disposed outside the two rotating drums 33.

[0055] The inner wall of the belt ring 34 and the outer wall of the rotating drum 33 are both provided with anti-slip teeth, and the anti-slip teeth at the two positions are in contact with each other.

[0056] When the movable winch 2 pulls the lifting lug 31 via the wire rope 4, the movement of the two fixed columns 32 can drive the belt ring 34 to rotate against the concrete in the formwork bag via the two rotating drums 33. Specifically, the lifting lug 31 is used to tie and connect the wire rope 4 to maintain the connection with the fixed column 32. The rotating drum 33 and the fixed column 32 are concentric. The anti-slip teeth on the inner wall of the belt ring 34 and the outer wall of the rotating drum 33 can maintain the adhesion between them, preventing the belt ring 34 from separating from the rotating drum 33 as the wire rope 4 is dragged. The belt ring 34 can rotate against the surface of the concrete in the formwork bag during the lateral movement, thereby driving the rotating drum 33 to rotate. This reduces the friction in the lateral movement of the vibrating part 3, making the lateral movement of the vibrating part 3 smoother. The belt ring 34 is made of wear-resistant belt material to ensure service life, and the belt ring 34 is elastic, which satisfies the good transmission of vibration force, increasing the frequency and area of ​​vibration force through the belt ring 34, and improving the vibration quality.

[0057] Furthermore, the vibrating unit 3 also includes a connecting rod 35 mounted on the fixed column 32, a covered sealing housing 36 mounted on the connecting rod 35 and located inside the belt ring 34, two vibrating motors 37 with energy storage function mounted near the inner side of the covered sealing housing 36, and a counterweight 38 positioned centrally within the covered sealing housing 36. Specifically, the connecting rod 35 provides a fixed connection for the sealing housing 36, the sealing housing 36 is collinear with the central axis of the belt ring 34, and the sealing housing 36 can be opened and closed normally. This design facilitates the maintenance of its internal parts and provides a good seal when the sealed housing 36 is closed. It is suitable for underwater operation, and the normal operation of the vibration motor 37 is not disturbed. The vibration motor 37 is a standard model and will not be described in detail here. The position setting of the two vibration motors 37 can avoid the difference in vibration angle and ensure its effectiveness and quality. The counterweight 38 increases the weight of the sealed housing 36. Under this action, the belt ring 34 can continuously fit with the slope surface and prevent the belt ring 34 from detaching from the concrete surface of the formwork bag due to the vibration reaction force.

[0058] Furthermore, the counterweight 38 includes a metal frame 381 disposed at the bottom of the sealed box 36 with a cover, and a plurality of counterweight blocks 382 disposed inside the metal frame 381.

[0059] At least one side of several of the counterweight blocks 382 is in contact with the inner wall of the metal frame 381, and the sides of two adjacent counterweight blocks 382 are in contact with each other. Specifically, several counterweight blocks 382 can be in contact with each other and with the inner wall of the metal frame 381 by inserting through the metal frame 381, maintaining the counterweight requirement for the normal use of the vibrating part 3. Moreover, several counterweight blocks 382 can flexibly disperse the weight of the counterweight part 38 through the operations of separating from and pulling out the metal frame 381, making the moving operation of the vibrating part 3 in the non-working state convenient.

[0060] Embodiment Two

[0061] As Figure 1-5 shown, the moving winch part 2 includes a moving trolley 21 slidably arranged on the track part 1, two groups of vertical rods 22 arranged on the moving trolley 21, a winding roller 23 rotatably arranged between the two groups of vertical rods 22 through a connecting shaft 25, and several annular grooves 24 arranged outside the winding roller 23;

[0062] Several of the annular grooves 24 can selectively connect the other ends of the two steel wire ropes 4;

[0063] The connecting shaft 25 can be connected to a handle or a driving motor. Specifically, when the annular groove 24 connects to the other end of the steel wire rope 4, the connecting end of the steel wire rope 4 can be protected and will not be damaged due to external force interference and friction. Under normal conditions, the two steel wire ropes 4 are parallel to each other and at a right angle to the lifting lug 31. At this time, the traction dragging force received by the fixed column 32 is balanced. When there is a missing corner or unevenness on the slope surface, the angle of the fixed column 32 can be changed by adjusting the length of one of the steel wire ropes 4 and selecting different annular grooves 24 for connection, so as to adapt to the angle-changing vibrating work in some missing corner areas and make the vibrating work adapt to environmental changes.

[0064] Furthermore, the track part 1 includes two fixed tracks 11 arranged in a straight line and bolted to the horizontal ground adjacent to the slope, and a convex rod 12 arranged on the fixed tracks 11;

[0065] The lower end of the moving trolley 21 is provided with wheels 211, and the wheels 211 are provided with annular grooves 212, and the annular grooves 212 can be combined with the convex rod 12. Specifically, through the insertion and contact of the convex rod 12 with the annular grooves 212, the wheels 211 are subjected to the limiting contact effect of three surfaces, so that when the moving trolley 21 moves, it is not easy to tip over forward or backward.

[0066] Furthermore, the track part 1 further includes an inverted T-shaped groove 13 arranged on the fixed tracks 11;

[0067] The lower end of the moving trolley 21 is provided with an inverted T-shaped rod, and the inverted T-shaped rod can be slidably inserted into the inverted T-shaped groove 13, where;

[0068] When the movable trolley 21 moves, the T-shaped rod can slide and move along the T-shaped groove 13. Specifically, the T-shaped rod slides and moves in the T-shaped groove 13 as the movable trolley 21 moves. At this time, the movable trolley 21 cannot be pulled up and separated from the fixed track 11, avoiding the situation that the movable trolley 21 topples due to its heavy head and light feet when the winding roller 23 is close to the top of the vertical rod 22, and increasing the stability of the movable trolley 21 during movement.

[0069] Embodiment Three

[0070] The patent also has the following problems;

[0071] The length of the fixed track 11 needs to adapt to the length of the slope horizontal plane, and it is difficult to lay the fixed track 11 with a longer size;

[0072] Please refer to Figure 8 , the track part 1 further includes two grooves 14 provided on one side of the two fixed tracks 11, two fixed shafts 15 respectively provided at the central positions of the two grooves 14, and a support connecting rod 16 rotatably connecting the two fixed shafts 15 and inserted in the two grooves 14.

[0073] Each of the four corners of the fixed track 11 is set as an oblique cut angle, where;

[0074] Rotating one of the fixed tracks 11 drives the support connecting rod 16 to rotate, and one of the fixed tracks 11 can be switched to fit the two ends of the other fixed track 11. Specifically, when the movable trolley 21 is about to move to the end along one of the fixed tracks 11, remove the bolts on the adjacent other fixed track 11 and rotate the other fixed track 11. Its rotation axis is the fixed shaft 15 on one of the fixed tracks 11. The other fixed track 11 is combined and switched from one end of one of the fixed tracks 11 to the other end, and then rotate one of the fixed tracks 11 in the opposite direction. Repeat this process to infinitely extend the movement track of the movable trolley 21, solve the limitation of the laying length of the fixed track 11, and the oblique cut angle ensures that the combined track after the rotation of the fixed track 11 is unobstructed, guaranteeing the integrity of the assembly process.

[0075] Furthermore, a number of support rigid bodies 161 are provided at the upper and lower ends of the support connecting rod 16;

[0076] A number of the support rigid bodies 161 are respectively in contact with the upper and lower walls of the groove 14. Specifically, a number of support rigid bodies 161 can locally support the groove 14, increase the rigidity of the fixed track 11, and ensure the quality and safety of the use of the fixed track 11.

[0077] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vibratory compaction device for concrete surface in a formwork bag, characterized in that, include: Track section (1); the track section (1) is set on the horizontal ground adjacent to the slope; Movable winch section (2); the movable winch section (2) is slidably disposed on the track section (1); Vibration section (3); The vibration section (3) can be set on the mold bag concrete of the slope for vibration work, and the vibration section (3) is connected to the movable winch section (2) by steel wire rope (4); When the movable winch section (2) is pushed along the track section (1), the movable winch section (2) can pull the vibrating section (3) to horizontally vibrate the concrete in the formwork bag via the wire rope (4); Rotate the movable winch (2), and the movable winch (2) can pull the vibrating part (3) to reciprocate up and down to vibrate the concrete in the formwork bag by the steel wire rope (4); The mobile winch unit (2) includes a movable trolley (21) slidably disposed on the track unit (1), two sets of uprights (22) disposed on the movable trolley (21), a winding roller (23) rotatably disposed between the two sets of uprights (22) via a connecting shaft (25), and several annular grooves (24) disposed outside the winding roller (23). Several of the aforementioned annular grooves (24) may selectively connect the other end of two of the steel wire ropes (4); The connecting shaft (25) can be connected to a handle or a drive motor; The track section (1) includes two fixed tracks (11) arranged in a straight line and bolted to a horizontal ground adjacent to the slope, and a protruding rod (12) provided on the fixed tracks (11). The track section (1) further includes two grooves (14) disposed on one side of the two fixed tracks (11), two fixed shafts (15) respectively disposed at the center of the two grooves (14), and a support connecting rod (16) rotatably connected to the two fixed shafts (15) and inserted into the two grooves (14). Each of the four corners of the fixed track (11) is set as a chamfer angle, wherein; Rotating one of the fixed tracks (11) causes the support link (16) to rotate, and one of the fixed tracks (11) can switch to assemble the two ends of the other fixed track (11).

2. The vibratory compaction device for the surface of molded concrete as described in claim 1, characterized in that, The vibrating section (3) includes two lifting lugs (31) connected to one end of the two wire ropes (4), two fixed columns (32) set on the two lifting lugs (31), two rotating drums (33) rotatably set outside the two fixed columns (32), and belt rings (34) set outside the two rotating drums (33). The inner wall of the belt ring (34) and the outer wall of the rotating drum (33) are both provided with anti-slip teeth, and the anti-slip teeth at the two positions are in contact with each other. When the movable winch (2) pulls the lifting lug (31) through the wire rope (4), the movement of the two fixed columns (32) can drive the belt ring (34) to rotate the concrete of the formwork bag through the two rotating drums (33).

3. The vibratory compaction device for the surface of molded concrete as described in claim 2, characterized in that, The vibrating part (3) further includes a connecting rod (35) provided on the fixed column (32), a covered and sealed box body (36) provided on the connecting rod (35) and inside the belt loop (34), two vibration motors (37) with power storage functions provided on the covered and sealed box body (36) near the inner side, and a counterweight part (38) provided at the center position of the covered and sealed box body (36).

4. The surface vibrating device for molded bag concrete according to claim 3, wherein the counterweight part (38) includes a metal frame (381) provided at the inner bottom end of the covered and sealed box body (36), and a plurality of counterweight blocks (382) provided inside the metal frame (381); at least one side of each of the plurality of counterweight blocks (382) is in contact with the inner wall of the metal frame (381), and the sides of adjacent two counterweight blocks (382) are in contact with each other.

5. The surface vibrating device for molded bag concrete according to claim 4, wherein wheels (211) are provided at the lower end of the movable trolley (21), and annular grooves (212) are provided on the wheels (211), and the annular grooves (212) can be combined with the convex rods (12).

6. The surface vibrating device for molded bag concrete according to claim 5, wherein the track part (1) further includes a T-shaped groove (13) provided on the fixed track (11); a T-shaped rod is provided at the lower end of the movable trolley (21), and the T-shaped rod can be slidably inserted into the T-shaped groove (13), wherein; when the movable trolley (21) moves, the T-shaped rod can slide and move along the T-shaped groove (13).

7. The surface vibrating device for molded bag concrete according to claim 6, wherein a plurality of support rigid bodies (161) are provided at the upper and lower ends of the support connecting rod (16); each of the plurality of support rigid bodies (161) is in contact with the upper and lower walls of the groove (14) respectively.

8. A method for vibrating the surface of formwork concrete, using the formwork concrete surface vibrating device as described in claims 1-7, characterized in that... The vibrating method includes the following steps: S1. Install the track part (1) perpendicular to the soil slope direction, slidably install the moving winch part (2) on the track part (1), connect the vibrating part (3) and the moving winch part (2) through a steel wire rope (4), and keep the vibrating part (3) on the geotextile bag; S2. Pour concrete into the geotextile bag. After this work is completed or when the concrete flow in the geotextile bag is blocked, laterally push the moving winch part (2) to make the moving winch part (2) pull the vibrating part (3) to move horizontally along the geotextile bag through the steel wire rope (4), rotate the moving winch part (2) to take in and release the steel wire rope (4) to pull the vibrating part (3) to move vertically along the geotextile bag, and at the same time drive the vibrating part (3) to start, so as to drive the vibrating part (3) to vibrate along a fixed track or reach a specified position as required; S3. Repeat the vibrating operation until the concrete pouring of the geotextile bag is completed, or the full-range vibrating after the pouring is completed.

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