JP2788934B2 - Plant for on-board ground improvement method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant for an on-board ground improvement method in which equipment used for the ground improvement method is mounted on a large vehicle, and the necessity of assembling work and demolition work on site is eliminated. .

[0002]

2. Description of the Related Art In recent years, in urban civil engineering works such as subways, water and sewage systems, common ditches, and underpasses, the construction depth of underground structures has been deepening, so that temporary construction works have been increased in size. Most of the work is done on the road. Prior to the construction of underground structures in urban civil works, various temporary construction methods have been adopted. In Japan, the soil layer composition of the underground ground is composed of cohesive soils such as silt and clay, sandy soil, gravel soil, etc., which are entangled in a complicated manner, and the soil properties such as relative density and relative consistency depend on the ground. Because of the difference, in the temporary construction method, countermeasures against groundwater etc. had to be considered.

[0003] Therefore, as a temporary construction method at a large depth,
Large-diameter pile ground improvement methods with waterproofness, strength, etc. have been actively adopted. This large diameter pile ground improvement method
About 150m ² (15m × 10
m) A work site of about m) is required, and the plant is a fixed plant, and a base is provided near the construction site each time, and the hardening material such as cement milk is kneaded at this plant and directly pumped to the construction site with a pump or If the plant is far from the plant base, a relay base is provided on the way, the cement paste kneaded at the plant is transported by a vacuum truck, mixer truck, etc., received by an agitator, and received from the agitator. The method of pumping to the construction site by a pump has been adopted.

However, when such a large-diameter pile ground improvement method is performed on a road due to overcrowding of a city, etc.,
Due to restrictions such as road use permission conditions, it has become difficult to secure land as a plant facility base. In addition, it took 1-2 days to carry the equipment into the site and assemble the site, and also required 6 to 8 hours for dismantling work. Not only that, the noise generated by the generator and the power source of the cement silo was terrible.However, considering the large size, assembling and dismantling, it was not possible to provide an effective soundproof wall. Because it was covered, noise could not be effectively prevented, and there was a problem that construction could not be performed, especially near nighttime houses.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a point, and does not require assembling and dismantling at the site, and has a small space for preventing noise. It is an object of the present invention to provide a ground improvement method plant capable of performing an improvement method and capable of performing construction without difficulty even on a site with a short construction period, a narrow site, a night site, and the like.

[0006]

Means for Solving the Problems In order to achieve the above object, the present inventor has made intensive studies and found that a plant for ground improvement method used for ground improvement method is to be mounted on a vehicle. Heretofore, this type of soil improvement method plant has not been mounted on a vehicle or has been known. As the ground improvement method plant is mounted on a vehicle, the equipment used is covered with a soundproof wall to prevent noise generated from the equipment and to improve the plant to reduce the space required by the present invention. Reached.

That is, the present invention provides a generator housed in a water tank mounted on the body of one large vehicle, a cement silo, a mixing plant and an agitator mounted on the body of the other large vehicle, Means for allowing the generator to be able to move up and down from the water tank to the water tank, and a compressor mounted on either of the two large vehicles;
It is characterized by comprising a high-pressure pump and an ultra-high pressure pump, and at least a soundproof wall surrounding the generator, cement silo power unit, compressor, high-pressure pump and ultra-high pressure pump equipment of both the large vehicles.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the present invention. A cement silo 2, a mixing plant 3, an agitator 4, a dust collector 28, and a high-pressure pump 5 are mounted on a vehicle body 1 of one large vehicle, and the other is mounted on the vehicle body 1. A generator 7 housed in a water tank 8 , an admixture container 6 ,
An ultra-high pressure pump 9 and an air compressor 10 are mounted. Note that the entire equipment on both vehicles is a soundproof wall 11
Is surrounded by However, noise generators,
Power unit for cement silo (not shown), compressor 1
If the high-pressure pump 5, the ultra-high-pressure pump 9, and the dust collector 28 for removing dust such as cement generated from the mixing plant are surrounded by soundproof walls, other devices may not necessarily be surrounded by soundproof walls.

In the above embodiment, as shown in FIG. 3, a single-sided adhesive as a synthetic resin sponge 14 is provided between the metal plate 12 and the porous panel 13 as the sound insulating material forming the sound insulating wall 11. An ester sponge is sandwiched, and the metal plate 12 is formed on the outer surface. A ventilation fan, preferably a silencing type ventilation fan, may be fixed to the soundproof wall 11 of the vehicle 1 'in order to increase the internal temperature and to allow exhaust gas to escape to the outside. Conventionally, when performing a large-diameter pile ground improvement method, the capacity of the entire device was extremely large, so that it was not possible to enclose it with soundproof walls, and there was a problem that the sound insulation effect was insufficient because it was enclosed by sheets. . According to the present invention, since the device is made compact and mounted on a vehicle, it is possible to easily surround the device with a soundproof wall, and it is possible to effectively shield the sound. be able to.

The generator 7 is configured to be able to move up and down on a water tank 8. That is, the generator 7 is stored in the water tank 8 until it arrives at the construction site, and when performing the construction, the generator 7 is raised above the water tank 8 so that the water can be stored in the water tank 8. As shown in FIG. 4, the generator 7 is placed on the plate 14, and a chain (not shown) fixed to the four corners of the plate 14 is attached to a chain fixed to the upper end of the side wall of the water tank.
By hooking a hook (not shown) of the control block 15, the generator 7 can be moved up and down from the water tank 8 onto the water tank 8. 5 and 6 show another means for making the generator 7 freely move up and down. Pulleys 40 and 40 'are fixed to the water tank 8 so as to face the upper end of the side wall thereof. The generator 7 is fixed to the upper end of the bent portion of the upwardly U-shaped plate 17 on which the generator 7 is mounted, and the generator 7 is mounted on the water tank 8. The water tank 8 can be moved up and down from inside.

Further, as shown in FIG. 7, the generator 7 is mounted on a vertically movable plate 18 in a water tank 8.
The generator 18 may be moved up and down from inside the water tank 8 to the water tank 8 by moving the plate 18 up and down. The plate 18 is 2
The two elongated plates 29a, 29b are connected at the center, and two plates 29, 29 'formed so as to open in an X-shape are opposed to each other, and the two plates 29, 29' are connected at the central connection. Is fixed to the member that moves up and down. One end of a jack 30, which is configured to be freely retractable, is fixed to one plate body 29 a of the plate body 29, and the other end of the jack 30 is fixed to the bottom surface of the water tank 8. Plate 2 forming plate 29, 29 '
One end of each of 9a and 29b is connected to the water tank 8 and the plate 1
8 and the other end is a plate 18 and a water tank 8, respectively.
It is fixed to the slide grooves 31, 31 'on the bottom surface.

When the jack 30 is automatically depressed, X
When one ends of the plate members 29a and 29b forming the character shape slide and the plate member 18 descends, and the jack 30 is automatically pushed up, the plate member 18 rises. Of course, the plate body 18 may be moved up and down by other known means. According to the present invention, as shown in FIG.
The screws 19, 19 'are laid laterally, and the cement is mixed in the mixing plant 3 through a vertical auger screw 20 erected near the center of the tip of the auger screws 19, 19'. To be supplied. The vertical auger screw 20 is rotatably mounted on the pipe 22.

Conventionally, as shown in FIG. 8, a single auger screw-1 is provided on the bottom of a cement silo 21 '.
9 ″ was laid horizontally, and cement was supplied into the mixing plant through a vertical auger screw 20 ′.
By adopting the horizontal biaxial system as in the present invention, approximately twice the amount of cement per unit time is sent to the vertical auger screw 20. Therefore, the cement is inevitably pressurized. Cement can be supplied into the mixing plant 3 and, as shown in FIG.
0 can be made smaller than that of the conventional apparatus, so that clogging of cement can be prevented. Conventionally, Figure 1
As shown in FIG. 0, since the single auger screw 19 '' was used, it was necessary to enlarge the consolidation portion in order to obtain a predetermined ascending speed, so that the consolidation portion was clogged with cement. There was a problem.

[0014] In addition, by adopting a horizontal biaxial system,
Since the lengths of the gas screws 19, 19 'and 20 could be reduced, the problem of deformation and distortion of the auger screw caused by rotation could be solved. Conventionally, the vertical auger screw 20 'is provided outside the square cement silo 21' as shown in FIG. 12, but according to the present invention, the vertical auger screw 20 'is provided. Can be shortened, and as shown in FIG. 13, it can be provided in the square cement silo 21. Thus, the apparatus can be made compact. Conventionally, vertical auger
As shown in FIG. 8, the screw 20 'is simply located close to the bottom surface of the cement silo 21'. Therefore, when the amount of cement is low, cement cannot be sent. Silo 2
There was a problem remaining in 1 '.

According to the present invention, as shown in FIG.
Since the gas screws 19 and 19 'are disposed in the grooves 31 and 31' formed in a semicircular cross section, cement is hardly left in the cement silo and supplied to the mixing plant 3. Can be sent. To drop the auger screws 19, 19 'into the concave grooves 31, 31', more than half of the auger screws 19, 19 'are located in the concave grooves 31, 31'. It is preferred that the auger screw and the concave grooves 31 and 31 'be located close to each other. The tips of the auger screws 19 and 19 'are formed in flat portions having the same depth as the recesses in the direction of cement advance, and the lower end of the vertical auger screw 20 is located in the flat portions. ing.

In the mixing plant 3, as shown in FIG. 17, two underwater mixers 14 are provided. The underwater mixer 14 has a stirring blade 33 attached to a lower end thereof, and a safety cover 34 is attached to the stirring blade 33.
Conventionally, stirring and kneading have been performed with a large-diameter blade. However, the use of the underwater mixer 14 has made it possible to knead uniformly and evenly quickly. In the mixing plant 3, the load cell for measuring the cement or the like while moving to the work site may be slightly displaced, and it takes a long time to correct the load cell to the correct center with the load cell guide rail. There was a problem. In the present invention, FIG.
As shown in FIG. 4, three compression-type load cells 35 are provided on the lower surface of three ring-shaped flange portions 41 provided at equal intervals on the outer periphery of the mixing plant 3, and a shaft is provided on the lower surface of each load cell 35. By locating the correction device 42, correction to the center can be performed very easily.

As shown in FIGS. 15 and 16, the shaft correcting device 42 according to the present invention has the lower end of the screw rod 37 screwed and fixed to the carrier 43 of the vehicle, and the upper end thereof is positioned at the lower surface of the load cell 35. A substantially conical male member 44 fixed to the screw 37 is
The female member 38 closely fitted to the male member 44 is fitted to the screw rod 37, and the nut 39 is connected to the female member 38 via a disc-shaped plate 45.
The female member 38 is tightly fitted to the male member 44 by being pressed from above, so that the screw rod 37 is accurately in an upright state. In this upright state, the tip of the screw 37 is connected to the load cell 35.
By adjusting the load cell 35 to the specified position,
Even if it is distorted, it can be easily corrected to the specified position.
In the above embodiment, the compression type load cell is used. However, the axis can be corrected in the same manner with a hanging type load cell.

The cement discharged from the cement discharge port 46 of the vertical auger screw 20 is supplied to the mixing plant 3 through a pipe connected to the discharge port 46. The water supplied from the water tank 8 and the admixture supplied from the admixture container 6 are stored in the mixing plant 3 in advance. By mixing them in the mixing plant 3, the cement milk is adjusted. The adjusted cement milk is sent to an agitator 4 provided continuously below the mixing plant 3. In the agitator 4, stirring blades are accommodated,
The cement milk is stirred by the stirring blades to prevent the cement from separating.

The heavy vehicles 1 and 1 'of the present invention are loaded with the above-mentioned equipment, and as shown in FIG. A structure in which a reinforcing material 25 formed in a continuous uneven portion is interposed between 24 and 24 '. After arrival at the work site, water is stored in the water tank 8,
In order to prevent the vehicle from tipping over because the weight of the bed is further increased, a vehicle overturn prevention device 26 is fixed to the lower surface on both sides of the large vehicle so as to be movable up and down in front and rear. The vehicle overturn prevention device 26 is configured such that a telescopic rod 48 is fixed to a circular support plate 27, and the rod 48 can be made to come and go inside the cylinder 28 by hydraulic pressure, water pressure, or screws.

[0020]

Next, description will be made of a method of constructing using the apparatus of the present invention configured as described above. As shown in FIG. 1, the vehicles 1, 1 'are carried into the construction site with their rear portions facing each other. First, the rod 48 of the vehicle fall prevention device 26 is extended downward, and the ground is pressed by the circular support plate 27. Next, the generator 7 is raised from the water tank, the switch of the generator 7 is turned on, and a predetermined amount of water is supplied to the water tank 8. Then, a predetermined amount of water is supplied into the mixing plant 3, and then a predetermined amount of the admixture is supplied.

Then, the horizontal type O in the cement silo 21
The gas screws 19 and 19 'and the vertical auger screw 20 are rotated to supply a predetermined amount of cement into the cement silo 21. The cement supplied into the cement silo 21 is sent from the horizontal auger screws 19 and 19 'to the vertical auger screw 20 and mixed from the discharge port 46 of the vertical auger screw. In plant 3,
A predetermined amount of cement is supplied. Mixing plant 3
Since the inside is stirred by the submersible pump 14, the cement, the admixture and the water are stirred and mixed to adjust the cement milk.

The cement milk thus prepared is stored in an agitator-4 stirred by a rotating blade. A large-diameter pile ground improvement method using this cement milk may be performed by a known method. That is, the ground may be pierced using the ultra-high pressure pump 9 and water, and simultaneously the cement milk may be poured into the pierced ground using the high pressure pump 5. At this time, the compressor 10 is also used at the same time. When the sound insulation effect during the above construction was measured, it was 90 db in the conventional method at a point 5 m from the plant and 0.9 m in height, but it was reduced to about 60 db using the device of the present invention, and it was reduced by about 30 db. Was completed.

[0023]

As described above, according to the present invention, since the large-diameter pile ground improvement method plant is made compact to be mounted on a vehicle, the assembly and dismantling work of the plant is not required, so that it is suitable for work with a short construction period. In addition, since the plant was made compact, it could be effectively enclosed by soundproof walls, making it suitable for night work at the site,
Because the plant is compact, it is possible to perform the work on narrow sites without any trouble.

[0024]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view of a soundproof wall used in the present invention.

FIG. 4 is a perspective view of a device used in the present invention that allows a generator to be moved up and down.

FIG. 5 is a perspective view showing another example of a device that allows the generator used in the present invention to be able to move up and down.

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a perspective view showing another example of a device that allows the generator used in the present invention to be able to move up and down.

FIG. 8 is a sectional view of a conventional cement silo.

FIG. 9 is a sectional view of a cement silo of the present invention.

FIG. 10: Auger screw of conventional cement silo
It is sectional drawing which shows a consolidation part.

FIG. 11 is a cross-sectional view showing an auger screw compaction part of the cement silo of the present invention.

FIG. 12 is a sectional view of a conventional cement silo.

FIG. 13 is a sectional view of a cement silo of the present invention.

FIG. 14 is a top view of the mixing plant of the present invention.

FIG. 15 is a side view of the mixing plant of the present invention.

FIG. 16 is a side view of an axis corrector used in the mixing plant of the present invention.

FIG. 17 is a sectional view of a mixing plant of the present invention.

FIG. 18 is a perspective view of a vehicle body of the vehicle according to the present invention.

[Explanation of symbols]

1, 1 'Large vehicle body 2 Cement silo 3 Mixing plant 4 Agitator 5 High pressure pump 6 Admixture container 7 Generator 8 Water tank 9 Ultra high pressure pump 10 Compressor 11 Soundproof wall 28 Dust collector

Claims (11)

(57) [Claims] 1. A generator housed in a water tank mounted on the body of one large vehicle, and a cement silo, mixing plant and agitator mounted on the body of the other large vehicle.
A means for allowing the generator to move up and down from the water tank to the water tank; and a compressor, an admixture container, a high-pressure pump, and an ultra-high pressure pump mounted on one of the two large vehicles. A plant for on-board ground improvement method comprising at least a generator, a cement silo power unit, a compressor, a high-pressure pump and a soundproof wall surrounding equipment of an ultra-high-pressure pump of both of the large vehicles. 2. The soundproofing material according to claim 1, wherein a sponge made of a synthetic resin is sandwiched between a metal plate and a porous panel, and the metal plate is formed on an outer surface. A plant for on-board ground improvement. 3. An inner bottom surface of the cement silo,
The two horizontal auger screws are laid laterally, and the two auger screws are vertically positioned close to the center of the tip of the two auger screws in the cement silo. The vehicle-mounted ground improvement method plant according to claim 1, wherein cement is supplied into the mixing plant. 4. The on-vehicle ground improvement method plant according to claim 1, wherein a recess is formed in the inner bottom surface of the cement silo, and the horizontal auger screw is laid horizontally in the recess. 5. An underwater mixer in the mixing plant.
The vehicle-mounted ground improvement method plant according to claim 1, wherein a plant is provided. 6. A chain block is fixed to an upper end of a side wall of the water tank, the generator is mounted on a base, and a hook of the chain block is hooked on a member fixed to the base. The on-board type ground improvement method plant according to claim 1, wherein the generator can be moved up and down from the water tank to the water tank. 7. A pulley is fixed to an upper end of a side wall of the water tank, a chain is hung on the pulley, and one end of the chain is hooked on a member fixed to a base on which a generator is mounted. 2. The machine can be moved up and down from the water tank to the water tank.
2. A plant for on-board ground improvement method according to item 1. 8. The generator according to claim 1, wherein said generator is placed on a vertically movable plate, and said generator is moved up and down from said water tank to said water tank. 2. A plant for on-board ground improvement method according to item 1. 9. The on-vehicle ground improvement method plant according to claim 1, wherein the loading platform of the heavy-duty vehicle is constructed by interposing a reinforcing material formed in a continuous uneven portion between metal plates. 10. The vehicle-mounted ground improvement method according to claim 1, wherein a vehicle overturn prevention device in which a support plate for supporting the ground moves up and down is fixed to the lower surface of both sides of the loading platform of the large vehicle. plant. 11. A female member fitted to a rod-shaped male member formed at the lower end of the rod and a rod-shaped male member formed at the lower end of the rod so that the tip of a rod standing upright on a vehicle carrier contacts the lower surface of the load cell of the mixing plant. An axis corrector is provided which is capable of closely fitting a member to the rod so as to bring the rod into an accurate upright state so that the tip of the rod and the specified position of the load cell can always be matched. 2. A plant for on-board ground improvement method according to item 1.