JPS60152722A - Method of hardening river bed ground for river scratch trench - Google Patents

Abstract

PURPOSE:To facilitate a work, by a method wherein a running span frame is disposed on rails on a banking, a moving platform is placed on the span frame, and a tower body having a excavating device is mounted on the platform. CONSTITUTION:A running span frame 3 is disposed on guide rails installed on a banking 16 of a river 28 so that it is movable longitudinally along the guide rails 5. A moving platform 2, mounted on the span frame 3 is laterally moved toward a ground bed to be improved to set a given place. After a rotary rod 8, positioned in parallel to a tower body 1 erected on the moving platform 2, is penetrated into a river 28 through the working of a driving device 7, a hardener is poured through an injection hole 18 as the rod 8 is lifted up, and the hardener is mixed with earth by an agitating vane 10 to build an improved ground column 6. Further, a work is effected as the span frame 3 is moved longitudinally along the rails 5 and the moving platform 2 is moved laterally along the span frame 3, and the improved ground columns 6 are built throughout a whole river bed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for improving powder, etc. at predetermined intervals in soft ground by moving a rotary p-rad equipped with stirring blades in the soft ground of various riverbeds freely back and forth to the left and right. This relates to a river bed soil hardening construction method for river raking, which aims to improve rivers by mixing and solidifying soil with a chemical agent and raking up soft soil such as sludge agglomerated on top of the soil. be.

Conventionally, waste such as sludge that has accumulated in rivers has been raked up by various means such as dredging, and restoration work has been carried out. However, due to the underwater construction, it was not possible to accurately determine the location of the excavation, and the accumulated waste moved around, making mining extremely ineffective.Furthermore, during river bed mining, the surrounding earth pressure,
It is difficult to dispose of it because it is easily damaged by water pressure, etc. (it is difficult to achieve a sufficient raking effect).

In addition, when creating a hardened layer in a river using an improved hardening agent such as quicklime or a chemical solution, it is difficult to set the position of the hardened layer and create an even thickness of the hardened layer, making it difficult to create a hardened layer. It has many drawbacks such as being unstable, being uneconomical due to extremely low pressure, and requiring a great deal of labor and construction time.

The present invention has been improved and developed in view of the above-mentioned conventional difficulties, and relates to a construction method for quickly, safely and reliably digging up soft soil such as sludge deposited in rivers to achieve river restoration. The gist is that a traveling construction frame is moved back and forth on a guide rail laid on a river embankment, and at a stop position of the traveling construction frame, a mobile platform on the traveling construction frame is rolled left and right.
At the stop position of the mobile platform, the stirring blades at the lower end of the rotating rod parallel to the turret are raised and lowered at predetermined intervals in the accumulated soft ground, and the solidifying agent such as powder is pumped by the rotating rod. After curing treatment by injecting and supplying by rotating stirring blades,
By repeatedly moving the mobile machine platform left and right and the traveling construction frame back and forth, improved soil pillars are created next to each other, and the soft soil such as sludge that has accumulated on the upper part of the improved soil pillars is dug up and the river is improved. This is what I did.

Therefore, according to the present invention, it is possible to reliably and easily mine waste such as sludge deposited in rivers using a very simple and reliable construction method, and to sequentially and accurately mine the improved ground layer at a predetermined location and thickness within the river. The effect to be achieved and the characteristics that the sludge layer above the improved ground layer can be reliably achieved, and the destruction of the river can be permanently prevented and the deep excavation work can be carried out sequentially and accurately. There is.

Next, five embodiments of the present invention will be explained based on the drawings (to explain, Fig. 1 shows an overall view of the equipment for carrying out the construction method of the present invention and the construction, and (1) shows a tower body assembled into various shapes. (1)
The turret body (11 is a mobile aircraft stand (2) framed in an approximately rectangular shape)
It is suspended above.

(3) is a traveling construction frame that moves the movable machine stand (2) from side to side. This traveling construction frame (3) is equipped with movable support legs (4), (41) at both ends, and is designed to be expandable and contractible in the lateral direction. (5) is a guide rail with various cross-sectional shapes. There are embankments located on both sides of the river (leO, which are connected and laid in the longitudinal direction. (6) is an improved soil pillar in a hardened state created by this device.
) is equipped with a driven wheel @ @ on which a wire (to) (c) for lifting and lowering from the hoisting winch Qil for the auger installed on the moving machine frame (3) is installed on the upper part. ,
A drive device (7) containing a two-unit swivel mechanism connected to and suspended from a driven wheel is suspended so as to be able to rise and fall. The lower end of the drive device (7) has one or more rotating rods (8).
(8) are rotatably connected by support such as a rod guide. A swivel u (11) is interposed at the lower end of the rotating rod (81 (8)) for stirring It (1 (1
This stirring blade (11+11 K) has an injection hole (Ls as) drilled at the required position for pouring out a hardening agent such as powder, and several stirring blade pieces (4
) Container......- is installed and the stirring blade αI (1 (I) is connected to the rotating rod (8) (8) K so that it can be raised and lowered freely. The symbol (9) supports the tower body (1). This indicates the stay to be used.

Further, the mobile machine stand (2) is framed in a substantially rectangular shape, and wheels a12 are installed at the four corners at the lower end to roll on sliding rails I laid in parallel to the traveling construction frame (3). be. sign (
Figure 1.4 shows the operators who operate each mechanical device installed on the mobile machine stand (2).

Furthermore, the guide rail (51 (5i) is installed on the opposing traveling construction frame (31 (31), which is installed on the lower end of the movable support legs +41 (4) provided at both ends, respectively), the width of which can be freely adjusted. 41 each having a travel motor as (14
It is equipped with 9. ←Q is embankment 7, and there is a guide rail (
5) is installed. (Iη is an embankment (represents a protection wall built on the river side of IQ. It is solidified with a chemical agent.It may be removed if necessary.The symbol (C) indicates a river bed.

According to the riverbed soil hardening method for river raking of the present invention, the first
As shown in the figure, a guide rail (51) is laid on the embankment Hαe of a river (C). Ha River bed (Ha) is located in a designated location that requires improved ground.

Next, the mobile machine stand (2) placed on this traveling construction frame (3)
) to the left and right with respect to the improved ground layer and set it on the predetermined location. The turret (1) erected on this mobile platform (2)
) The rotating rods F (8) (8) are connected to the drive device (7
), the rotating river trap (81) descends and penetrates to the desired depth.

At this time, the length of the improved ground layer relative to the river bed (c) is set in advance to the stirring blade Q11 (IQ lift dimension) at the lower end of the rotary rond (81 (8)), so the improved ground pillars are made to a constant thickness. Next, when starting to pull up, the rotating rond (81 (81) and the stirring blade (1) installed at the lower end)
At the same time as the 1H is rotated, the consolidation agent is pumped through the rotating Rondo T81 < 81 along with pressurized air from the pumping device, and is injected from the injection hole as Q field to uniformly mix the soft ground and consolidation agent while artificially Improved ground pillars 16) +61 will be constructed to the specified height. Next busy, the rotating rondo (81 (81
(adjacent to 61 and up to the other side wall of the river, as shown in Figure 5, move the improved ground pillar t6) up to improve the average height of the improved ground pillar +61 (6)... After that, move the traveling construction frame (3) in the direction of the flow of the river bank and place it adjacent to and parallel to the improved ground pillars +61 +61 to repeat the solidification work, so that the entire bottom of the cylinder is covered with the specified area. Improved soil pillars (61 (6)) with a thickness of The device is used to dispose of the waste outside as waste and restore the river's depth to its normal position.

Furthermore, stirring @ (11 (injection hole provided in IQ ◇5tts
In order to discharge the solidifying agent from below, it is natural to not only press it in from the bottom and stir it upwards, but also to freely discharge and mix it during the lifting operation. In addition to constructing the tower laterally, the tower body (1) may also be moved in the direction of the river flow to improve the ground as appropriate.

As described above, according to the riverbed soil hardening method of the present invention, river raking work, which was previously extremely troublesome work, can be easily carried out, and the work does not have to be carried out in an unstable condition like a dredger. It has the effect of being able to be constructed completely reliably and in a short period of time. Also.

The required position, required thickness, etc. of the improved soil pillars to be constructed in the river can be freely selected, and therefore the ground and solidifying agent can be mixed uniformly.

It has the excellent effect of creating a completely consistent ground layer. Furthermore, the guide rails installed on the embankment are easy to assemble, disassemble, and move.

This has the effect of stably placing the traveling construction frame and sliding it smoothly, increasing the efficiency of the work. In addition, the traveling construction frame can be expanded and contracted according to the width of the river, and the inside of the cylinder can be adjusted, making it easy to use on rivers of 6 sizes. This has the effect of allowing the movable machine base to operate stably for placing traps, thereby significantly improving construction ability. In addition, since the movable machine base has a tank suspended from the rotary rond with stirring blades at the lower end, the turret body and the rotary rond can be operated stably, and it is possible to create and solidify at the desired location. This has the practical effect of being able to stably and accurately control the discharge amount and drawing speed of the binder.

[Brief explanation of the drawing]

Figure 1 is a front view of the entire apparatus for carrying out the construction method of the present invention;
Fig. 2 is a side view, Fig. 3 is a plan view, Fig. 4 is a sectional view of the main part with one part removed, Fig. 5 is a cross-sectional plan view of the improved soil pillars being constructed in sequence, and Fig. 6 is a cross-sectional view of the main part with one part removed. FIG. 7 is a side view of the implementation state of the method of the present invention, and FIG. 7 is a side view of the stirring blade. Sign (1)
is a turret body. (2) is a mobile platform, (3) is a traveling construction frame, (5) is a guide rail, (6) is an improved soil pillar, (II is a stirring blade, αf9 is an embankment, αη is a membrane wall, and n is a river bed. Figure 1 Figure N2

Claims (1)

[Claims] The traveling construction frame is moved back and forth on a guide rail laid on a river embankment, and at the stopping position of the traveling construction frame, the mobile platform on the traveling construction frame is rolled left and right, and at the stopping position of the traveling construction frame. The stirring blades at the lower end of the rotating rod parallel to the turret are set up and down at predetermined intervals in the soft ground that has accumulated, and the solidifying agent such as powder that is pumped from the inside of the rod is injected by the rotation of the stirring blades. After supplying and curing, improved soil pillars were created next to the mobile machine platform and the moving construction frame was repeatedly moved back and forth, and the soft soil such as sludge accumulated on the upper part of the improved soil pillars was scraped. A riverbed soil hardening method for river raking, which involves improving the river by pumping it up.