JPS5812416B2 - Improvement equipment for deep soft ground - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ground improvement device for injecting a soil improvement treatment agent into deep soft ground.

Figure 1 shows an example of a conventional force-type soft ground improvement device, in which a ground improvement device with a stirring blade C and a soil improvement treatment agent inlet d at the tip is installed along a turret b erected on a work boat a. The improved member e is supported so as to be able to rise and fall freely via a wire rope f for suspending soil and a wire rope g for lifting, which are connected to a winch, respectively. The same ground B is stirred at C, and the ζ ground improvement treatment agent is introduced from the input hopper h and injected into the soft ground B to improve the same ground B.

However, in this type of device, since the stirring blade C is fixed to the tip of the improved member e, the drive shaft becomes long in deep sea, which is structurally dangerous and requires a large horsepower drive device. In addition, in deep-sea work, the height of the turret b becomes extremely high, making it unavoidable to increase the size of the work boat a itself.In order to improve this point, the system shown in Figure 2 has been proposed. .

That is, in the method shown in Fig. 2, a soil improvement main body i includes a soil improvement treatment agent storage chamber j, a built-in power section k, and an agitating blade 1, and is suspended by a wire rope m from a work boat a. However, since the storage chamber j1 has a built-in power section k, the device becomes large, and the capacity of the storage chamber j is limited, so continuous construction is not possible. However, since the device is intended to sink due to its own weight, the weight of the device becomes excessive, and the verticality is uncertain because it is suspended by a wire rope m.

Furthermore, when carrying out large-scale, wide-area ground improvement work using the conventional methods described above, the work boat must be moved frequently, and the surface joints of the improved ground constructed using the force methods become misaligned, resulting in unreliability. There was some regret that the construction work was not carried out to a high standard.

The present invention has been proposed in view of the above circumstances, and includes a pair of support pipes, etc., which are mounted on a work boat so that they can be raised and lowered, and are placed under soft ground to secure the work boat. and a soil improvement treatment agent casting member whose ends are guided along the support members and are movable up and down. The reason for this is that the improvement of wide-area deep soft ground is being carried out continuously, and that it provides technical construction equipment with excellent work efficiency and high reliability.

Since the present invention is constructed as described above, a pair of supporting members mounted on a work boat so as to be able to rise and fall are cast and fixed under the soft ground at the bottom of the water, and the ground improvement treatment is applied using each of the supporting members as a guide. By moving the casting member up and down, the soft ground between the support members is moved in the vertical force direction, and the soil improvement treatment agent is cast into the soft ground from the casting member, so that The seamless improved ground is constructed continuously and accurately in the vertical force direction between the pair of supporting members.

As described above, according to the device of the present invention, soft ground in a wide area can be continuously improved without frequently moving the work boat, work efficiency can be improved, and construction can be performed with high reliability.

Further, according to the device of the present invention, the soft ground is improved in a movable manner over the vertical force direction, so that a high tower is not required.

The soil improvement treatment agent is transferred from a work boat, a ship that stores the treatment agent, or a treatment agent storage unit on land using a pressure-feeding pneumatic transportation means through flexible pipes, hoses, etc. to improve the ground. Continuous long-term construction is possible by supplying the treatment agent to a casting member and ejecting it onto the soft ground from the jet hole of the member.

The present invention will be described below with reference to the illustrated embodiments.

In Fig. 3, reference numeral 1.1' indicates a work boat supported by an anchor 2 or a spud, and each of the work boats 1 and 1' has a support pipe that constitutes a guide support member for the soil improvement treatment agent casting member 3. 4, 4' and a turret 5 equipped with a driving device consisting of a clamping device and a pushing device for driving each of the same pipes.
5' and winches 7, 7' around which the lifting cables 6, 6' of the casting member 3 are wound, and by the mechanism described above,
It consists of a pair of support members that are mounted on the workboat so that they can be raised and lowered, and are cast under soft ground to fix the workboat.

A stirring spiral blade 9 is provided on the outer periphery of the horizontal pipe 8 that forms the main body of the casting member 3, and a nozzle 10 for ejecting a soil improvement treatment agent is provided.

Furthermore, a guide 11 is attached to one end of the horizontal pipe 8 and is slidably attached to the support pipe 4 and has a built-in driving device for the horizontal pipe 8, and at the other end of the horizontal pipe 8, a guide 11 is attached. slidably attached to the support pipe 4';
Further, a guide 12 having a built-in soil improvement treatment agent supply device for the horizontal pipe 8 is attached.

The horizontal pipe 8 is constructed in a continuous manner so that the range of ground improvement can be adjusted.

In the figure, 13 indicates a ground improvement treatment agent supply hose and an air supply hose; 14. Reference numerals 1 and 4' designate excavating members attached to the tips of the support pipes 4 and 4', respectively.

When carrying out improvement work on soft ground, the pair of work boats 1,
1' is moored at a predetermined position, the support pipes 4, 4' are cast up to the support layer to fix the work boat 1, 1', and the casting member 3 is softened using the support pipes 4, 4' as a guide. It is lowered to the lower part of the ground B, the soil improvement treatment agent is sprayed and diffused from the spray nozzle 10 of the horizontal pipe 8, and while stirring with the stirring spiral blade 9, the casting member 3 is gradually pulled up with the winches 7 and 7'. This involves constructing a wall-shaped improved ground.

In the embodiment shown in FIG. 4, support casting turrets 5, 5' for supporting pipes 4, 4' are movably mounted on guide rails 15 laid on the work boat 1.

In addition, a stirring blade 16 is mounted on the horizontal pipe 8 that forms the main part of the soil improvement treatment agent casting member 3, and a nozzle 10 for ejecting the soil improvement treatment agent is disposed on the horizontal pipe 8.
A guide 11 having a built-in ground improvement treatment agent pneumatic supply device, etc. is attached to the support pipe 4, and the guide 11 is slidably attached to the support pipe 4, and a guide 12 is attached to the other end of the horizontal pipe 8. The log guide 12 is the support pipe 4
’.

Further, since the horizontal pipe 8 of the pouring member 3 is constructed in a continuous manner, the pair of turrets 5, 5' are connected to the guide rail 15.
Coupled with the fact that it is movably mounted on top, the construction range can be adjusted.

Note that the ground improvement work using the illustrated apparatus is carried out in the same manner as in the previous embodiment, and therefore the explanation will be omitted.

Further, the same reference numerals are given to the same parts as those of the above-mentioned embodiment in the drawings.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various designs without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIGS. 1 and 2 are front views showing conventional deep soft ground improvement equipment, respectively, and FIGS. 3 and 4 show work situations of each embodiment of the deep soft ground improvement equipment according to the present invention, respectively. It is a front view. 1, 1'...Work boat, 3...Soil improvement treatment agent casting member,
4.4'...Support pipe. 5,5'...turret, 6.6'...lifting cable, 7,7'...winch. 8...Horizontal pipe, 11, 12...Guide, 15...
guide rail.

Claims (1)

[Claims] 1. A pair of support members constructed of support pipes, etc., which are mounted on a work boat so as to be able to be raised and lowered and placed under soft ground to fix the work boat, and both ends of which are guided along the support members; A device for improving deep soft ground, comprising a soil improvement treatment agent casting member that is movable up and down.