JPS5939568B2 - Soft soil layer solidification equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for solidifying a soft upper layer such as a weathered clay layer or a mud layer on the bottom of a water body.

Conventionally, the above-mentioned soft upper layer has been solidified with a hardening agent liquid such as cement emulsion.To do this, a solidification device body consisting of an excavation agitator and a hardening agent injection pipe is inserted into the soft upper layer from a work boat, and the hardening agent is poured into the soft upper layer. Liquid mixing main pillars are formed adjacent to each other in sequence.

However, there is a drawback that the main body of the solidifying device tilts due to the influence of waves, leaving a soft upper layer between the main pillars of the hardening agent mixture. As a solution to this problem, it has been proposed to mount the solidification device on a floating platform and seat the floating platform on the soft upper layer of the water bottom. However, if the soft upper layer has undulations, This has the disadvantage that the main body of the solidification apparatus is tilted, making it impossible to perform the solidification process. An object of the present invention is to provide a soft upper layer solidifying device that can deal with waves and undulations of the soft upper layer and accurately solidify the soft upper layer.

Embodiments of the present invention will be described below based on the drawings.

1 and 2, reference numeral 10 denotes a flat frame-shaped floating workbench, and the waterbed 11 is located near the four corners of this waterworkbench 10.
A spud 12 to be driven in is disposed so as to be movable up and down, and a first work cart 15 is movably installed along a rail 14 on the upper surface of the opposing side frames 13, 13. 1
6 is the rail 1? on the first work cart 15 mentioned above. 1st along
A second work cart is arranged to be movable in a direction perpendicular to the moving direction of the work cart 15. A tower 18 and a winch device 19 are installed on the second work cart 16. (see Figure 3) is guided by a fixed pulley 21 provided at the top of the tower 18.

22 is a solidification device main body, which includes a watertight box 24 suspended from the wire 20 via a movable pulley 23, and two bearing cylinders 25 suspended from this watertight box 24 (see FIG. 4). , a total of eight rotating shafts 2T located on the outer periphery of each cylindrical body 25 and supported by bearings 26 of the same cylindrical body 25, and a hydraulic motor 28 disposed inside the watertight box 24 (see FIG. 1). ), and the hardening agent liquid injected into the upper part of the excavation agitation blade 29 through the excavation agitation blade 29 formed on the outer periphery of the lower part of each rotating shaft 21, the watertight box 24, and the inside of the bearing cylinder 25. It consists of a tube 30 (see Fig. 4).

The hydraulic motor 28 and hardening agent liquid injection pipe 30 are connected to a pressure oil supply unit 31 and a hardening agent liquid platform 32 installed on the floating work platform 10. As shown in FIGS. 1 and 2, a total of four bearings 33 are fixedly installed on both sides of the first work cart 15 between the side frames 13 and 13 of the floating work platform 10. Spud 3 is driven into the bottom 11 of the water.
It is fitted through a four-force sentry joint 35 (see FIG. 7) so that it can move up and down and swing.

Further, a planar frame-shaped guide girder 37 supporting a guide device 36 is provided on these four spuds 34 so as to be movable up and down. As shown in FIG. 5, the guide device 36 is fitted between the front and rear frames 38, 38 of the guide girder 37, and is connected to the second work cart 16 along the rails 39 provided on the front and rear frames 38. The cylindrical body 25 is brought into contact with the base 40 which is disposed movably in the same direction, and each strip 41 provided on the outer periphery of each of the bearing cylindrical bodies 25 as shown in FIG.
A piston rod 43 is provided with six hydraulic cylinders 44 each, each of which has a guide roller 42 that guides the piston rod in the vertical direction, and a fifth cylinder.
As shown in FIG.
5, a pair of front and rear fixed guide members 47 that engage claw pieces 46 formed on the watertight box 24.

Each hydraulic cylinder 44 is connected to the pressure oil supply unit 31 described above. In addition, as shown in FIG. 1, the guide device 3
Inclination measuring devices 48 and 49 are arranged above the base 40 and the watertight box 24 of No. 6. As shown in FIGS. 1 and 2, winch devices 50 and 51 for raising and lowering the spud 34 and guide girder 37, and a winch device 52 for moving the guide device 36 from side to side are provided on the side surface of the first work cart 15, respectively. It is being

53, 54, 55 are wires of each winch device 50, 51, 52.

Next, the operation of the above configuration will be explained. First, the first
With all the spuds 12, 34 and guide girder 37 pulled up as shown in the figure, the floating work platform 10 is towed to a predetermined work position. From this, after driving the spud 12 into the water bottom 11 as shown in FIG. 3 and positioning the floating work platform 10 with respect to the water bottom 11, the piston rod 43 of each hydraulic cylinder 44 shown in FIG. 42 is moved backward, the wire 20 of the winch device 19 on the second work trolley 16 is pulled out and the solidification device main body 22 is pulled out.
descend. Then, the excavation stirring blade 29 is connected to the guide roller 42.
After passing through the piston rod 4 of each hydraulic cylinder 44
3 to bring each guide roller 42 into contact with the strip 41 of the bearing cylindrical body 25 to prevent the cylindrical body 25 from wobbling. Next, the wire 54 of the winch device 51 is let out to lower the solidification device main body 22 and the guide girder 37 together, and they are temporarily stopped just before the guide girder 37 touches the bottom of the water 11.

In this state, the inclination of the guide girder 37 is detected by the inclination measuring device 48, and the amount of wire projection of each winch device 51 is adjusted to adjust the guide girder 37 horizontally. Thereafter, each spud 34 of the first working cart 15 is driven into the water bottom 11, and the guide girder 37 is horizontally landed on the water bottom 11 using the spuds 34 as a guide (does the guide girder 37 necessarily land on the bottom? At this time, as shown in Figure 7,
Since the universal joint 35 is interposed between the spud 34 and its bearing 33, the spud 34 is driven into the water bottom 11 smoothly. Subsequently, pressure oil is supplied from the pressure oil supply unit 31 to the hydraulic motor 28, and the solidification device main body 22 is inserted into the soft soil layer of the water bottom 11 to a predetermined depth while rotating each excavation stirring blade 29. At this time, as shown in Figure 6, the watertight box 2
Each of the four claw pieces 46 engages with both side portions 45 of each fixed guide member 47. After inserting the solidification device main body 22 into the soft soil layer, the hardening agent liquid is supplied from the hardening agent liquid plant 32 to the excavation stirring section through the hardening agent liquid injection pipe 30 while keeping the excavation agitation blades 29 rotating, and the hardening agent liquid is solidified. The device main body 22 is sequentially raised to form a hardening agent liquid mixed soil pillar (not shown).

At this time, the levelness of the solidification device main body 22 is monitored by the inclination measuring device 49 disposed in the watertight box 24. Once V1 mixed soil pillars are completed through these steps, the wires 55 of the four winch devices 52 are operated to move the guide device 36 to the next solidification point, and the second work is started. The trolley 16 is moved in the same direction by the same amount to align the movable pulley 23 directly below the hanging part of the solidification device main body 22, that is, the fixed pulley 21. After this, the water bottom 1 of the guide girder 37 is
1, the following operations are performed: insertion of the solidification device main body 22 into the soft soil layer, injection of hardening agent liquid, solidification device main body 22
A continuous curing agent liquid mixed soil column is formed by performing a lifting operation and wrapping it around a part of the hardening agent liquid mixed soil column. Thereafter, in the same manner, other soft soil layers in the guide girder 37 are successively formed into hardening agent liquid mixed soil columns, and the guide girder 3
Complete the solidification work of the soft soil layer in 7.

Thereafter, the spud 34, the solidification device main body 22, and the guide girder 37 are once pulled up, and the first work cart 15 is moved forward one pitch. From this point on, a row of soil pillars mixed with a hardening agent liquid that overlaps with a portion of the soil pillars mixed with a hardening agent liquid is formed using the same procedure as described above. In this way, all the soft soil layers in the area surrounded by the floating work platform 10 are solidified, and after the solidification work is completed, as shown in FIG. 34, pull up the guide girder 37 and move the floating work platform 10 to the next solidification position. During the solidification work, as shown in FIG. Since the solidification device main body 22 is guided in the direction, it is less affected by waves and moves up and down accurately.

Furthermore, since the guide girder 37 is installed horizontally with a certain distance from the water bottom 11 using the spuds 34 as a guide, even if there are undulations in the soft soil layer on the water bottom 11, the undulations can be dealt with and solidified. The verticality of the device main body 22 is maintained. For these reasons, the soft soil layer on the water bottom 11 is accurately solidified. In addition to the spuds 12, wires, chains, etc. can also be used to position the floating work platform 10 with respect to the water bottom 11.

As described above, according to the present invention, it is possible to deal with waves and undulations of the soft soil layer and to accurately solidify the soft soil layer.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of a soft soil layer solidification device according to an embodiment of the present invention, Fig. 2 is a plan view of the same solidification device, Fig. 3 is a diagram of one process of the solidification work, and Fig. 4 is a 3 is an enlarged sectional view taken along line 4-4, FIG. 5 is a sectional view taken along line 5-5 in FIG. 4, FIG. 6 is a sectional view taken along line 6-6 in FIG. FIG. 3 is an enlarged partial cutaway plan view. DESCRIPTION OF SYMBOLS 10... Water work platform, 11... Water bottom, 15... First work cart, 16... Second work cart, 22... Solidification device main body, 34... Spud, 36... Guide device, 37... Guide girder.

Claims (1)

[Claims] 1. A floating work platform positioned with respect to the water bottom, a first work platform that moves on the water platform, and a second work platform that moves on the work platform in a direction perpendicular to the direction of movement of the work platform. A solidification device main body is suspended on the second work cart and inserted into the soft soil layer at the bottom of the water, a plurality of spuds are driven into the soft soil layer from the work cart, and the soft soil layer is guided by the spuds. A soft soil layer solidification device comprising a guide girder installed horizontally in the guide girder, and a guide device supported by the guide girder to guide the solidification device main body in the vertical direction and move in the same direction as the second work cart.