JPH063863Y2 - Barge-type ground improvement machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pontoon-type ground improvement machine that hardens by mixing a hardening agent such as ready-mixed concrete into the water bottom ground.

(Prior Art) As shown in the plan view of FIG. 6, the conventional barge-type ground improvement machine constructs a promenade B and a dike on both sides of the river A, so that the water is flowing at the relevant place. In order to harden the ground at the bottom of the water, one leader 2 is erected on the short side 1a side of the rectangular pedestal 1, and one hollow stirring shaft 3 is attached to the leader 2 and the stirring shaft 3 is attached. The hardener was mixed while being pushed into the water bottom and pouring a hardener such as green concrete from the lower end thereof while stirring the sludge of the water bottom ground by stirring blades provided at the lower end of the stirring shaft 3.

(Problems to be solved by the invention) In this conventional pontoon type ground improvement machine, in order to obtain a reaction force when the stirring shaft 3 is pushed into the water bottom, the pedestal 1 is formed into a rectangular shape and its short side is formed. Since the leader 2 is attached to the ship, a large portion of the river width W is occupied by the berth 1 during the construction work, which poses a problem that it obstructs the passage of other ships.

Further, since the reader 2 and the stirring shaft 3 are attached to the short side 1a, there is a problem that the efficiency is low.

(Means for Solving Problems) In order to solve the above-mentioned problems, the pontoon ground improvement machine of the present invention is designed so that the pontoon is a rectangle or an ellipse whose length is at least twice the width, or both ends. It is formed in a long shape so as to have a pointed shape, a plurality of leaders are erected along one long side of the pontoon, and the leaders are connected by a connecting body, and each leader and the pontoon. The space is connected by a wire rope, and a stirring shaft for pouring fresh concrete is attached to each leader in a vertically movable manner.

Also, not one for each reader, but two for each.
A book stirring shaft can be attached.

Further, by making the total width in the arrangement direction of the blades of the two stirring shafts respectively attached to the respective leaders and the width between the blades of the stirring shaft sets respectively attached to the adjacent leaders substantially equal, The ground can be improved while changing the location by moving the winch of the ship.

(Embodiment) FIGS. 1 to 3 are views showing an embodiment of a barge-type ground improvement machine according to the present invention. In the plan view of FIG.
Is a pontoon, and the pontoon 4 is formed in a rectangular shape in which the length b of the long side is twice or more the length a of the short side, and as an example, the width a is 12 m, and the length is 12 m. Let b be 36 m.

As shown in the figure, two or three or more readers 5 are erected on one long side of the pontoon 4. Then, a hollow stirring shaft 6 is attached to each reader 5. The illustrated example shows an example in which two stirring shafts 6 are attached to each reader 5.

In addition, winches 7 are installed at the four corners of the pontoon 4, and anchors 9 are attached to the ends of the wire ropes 8 wound around the winch 7, so that the winch 7 can be driven to move the pontoon 4 over a relatively short distance. In fact, the movement of the berth 4 over a relatively long distance is carried out by rotating an operation screw (not shown) by driving a motor. The hydraulic unit 10 and the ready-mixed concrete supply device 11 are mounted on the berth 4.

FIG. 2 and FIG. 3 are a side view and a front view showing the overall structure of the ground improvement machine of the embodiment, in which each leader 5 is mounted on the bracket 12 installed on the pedestal 4 and is inclined forward and backward and left and right. As possible, each is supported by a back stay 14 having a vertical holding hydraulic cylinder 13 of the leader,
Both ends of the two leaders are pinned (not shown) by a connecting body 15 composed of a plurality of rods or beams.
The readers 5 are connected to each other so that the readers 5 depend on each other. Moreover, the leader 5 is reinforced by connecting the respective leaders 5 and the pontoons 4 with wire ropes 16.

Two guide pipes 17 are attached to each reader 5, and a holder 18 is slidably attached to the guide pipes 17,
A stirring shaft drive device 21 having a hydraulic motor 19 and two chuck devices 20 is attached to the holder 18,
The stirring shaft 6 having a stirring blade 6a at its lower end is held at its upper end by a chuck device 20 and slidably held by a guide 22 attached to the lower part of the reader 5. In some cases, the drive unit for the stirring shaft 6 may be attached to the lower guide 22. In this case, the stirring shaft 6 has a rectangular cross section.

The holder 18 is the hydraulic motor 2 attached to the lower end of the leader 5.
3 is connected to a chain (not shown) wound between a sprocket driven by 3 and a sprocket attached to the upper end of the leader 5, and the stirring shaft 6 is moved up and down by the operation of the hydraulic motor 23. ing.

As shown in FIG. 2, each driving device 21 is provided with a device for injecting it into the stirring shaft 6 from the pressure feed pump 24 of the concrete supply device 11 via the hose 25, and the device is press-fitted into the stirring shaft 6. The raw concrete is poured into the ground below the water bottom 26 from the lower end of the stirring shaft 6, and the driving device 21 stirs the stirring shaft 6 to uniformly mix the raw concrete.

According to the configuration of this embodiment, as shown in FIG.
Since the occupying width of the pontoon 4 can be reduced and the width W through which another ship can pass can be increased, it does not hinder the navigation of the ship.

Further, since the leaders 5 are erected on the long sides of the pontoon 4, a plurality of leaders 5 can be erected, and it is possible to inject ready-mixed concrete or the like at a plurality of locations at the same time. By attaching two stirring shafts 6 to each reader 5, the work efficiency can be further improved. Further, since the two leaders 5 are erected on the pontoon 4 and are connected to each other by the connecting body 15 such as a rod, the leader 5, the back stay 14 and the like can be reduced in weight, and as a whole, conventional A highly efficient ground improvement machine is constructed with almost the same weight as.

Further, as shown in FIG. 4, the total width c of the two stirring shafts attached to each of the readers 5 and 5 in the arrangement direction of the blades 6a and 6a, and the stirring shaft assembly attached to the adjacent readers, respectively. The width d between the wings 6a of the same is approximately equal (c≈d)
As a result, as shown by the solid line, after the fresh concrete is injected by the four stirring shafts 6, the winch 7 is actuated to move the gap d as shown by the two-dot chain line e.
By moving the pallet carrier 4 in the x direction and injecting the fresh concrete by the four stirring shafts 6, it is possible to perform the pouring evenly, and the berth 4 can be moved in a short time without using the screw drive. , You can work efficiently.

As shown in FIG. 5, the frame 21a of the drive device 21 is attached to the holder 18 so as to be vertically movable along the support column 29, and the frame is fixed by the compression springs 27 and 28 attached above and below the frame 21a of the holder 18. If the structure for supporting 21a is used, even if the pontoon 4 moves up and down due to waves, there is a risk that excessive stress will be applied to the stirring shaft 6 in a working state in which the stirring blades 6a are buried and fixed in the water bottom 26. There is no possibility that the stirring shaft 6 will be damaged due to buckling or the like.

(Advantage of the Invention) The pontoon-type ground improvement machine according to claim 1 is a pontoon with a length of 2 mm.
Formed in a shape more than twice the length, and standing a plurality of leaders along one long side of the pontoon, connecting these leaders with a connecting body, and connecting each leader and the pier with a wire rope However, since the mixing shaft for pouring fresh concrete was attached to each leader so that it could be moved up and down, the width occupied by the barge on the river could be reduced, and the width that other ships could pass through could be increased. The degree of obstruction is reduced. In addition, since the leader is erected on the long side of the barge, a plurality of leaders can be erected. Therefore, it is possible to inject a hardening agent such as ready-mixed concrete at multiple locations at the same time, improving efficiency. Contribute. In addition, since a plurality of leaders are erected on the pontoon 4 and these leaders are connected to each other by a connecting body such as a rod, the leaders, the back stays, etc. can be made lighter, and the overall weight is almost the same as the conventional one. A highly efficient ground improvement machine is constructed.

Further, in claim 2, 2 is provided for each of the readers.
Since a stirring shaft is attached to each one, the efficiency is further improved.

Further, in claim 3, the width in the arrangement direction of the two stirring shafts respectively attached to the respective leaders and the width between the stirring shaft sets respectively attached to the adjacent leaders are made substantially equal. It is possible to improve the ground evenly while changing the place by moving with a winch, and the place can be moved in a short time, further improving the efficiency.

[Brief description of drawings]

FIG. 1 is a plan view showing an outline of an embodiment of a barge-type ground improvement machine according to the present invention, FIG. 2 is a side view of the embodiment, FIG. 3 is a front view of the embodiment, and FIG. FIG. 5 is a plan view showing an arrangement of stirring shafts, FIG. 5 is a side view showing an example of a stirring shaft mounting structure in the present invention, and FIG. 6 is a plan view showing a conventional barge-type ground improvement machine.

Claims (3)

[Scope of utility model registration request] 1. A pontoon is formed into a shape having a length that is at least twice the width, a plurality of leaders are erected along one long side of the pontoon, and the leaders are connected together. The pontoon-type ground improvement machine in which each leader and the pontoon are connected by a wire rope, and a stirring shaft for concrete milk injection is attached to each leader so that it can be raised and lowered. 2. The pontoon-type ground improvement machine according to claim 1, wherein two stirring shafts are attached to each of the leaders. 3. The total width in the arrangement direction of the blades of the two stirring shafts attached to each of the leaders and the width between the blades of the stirring shaft sets attached to the adjacent leaders are substantially equal to each other. The barge-type ground improvement machine described in 2.