JPS62101715A - Slime processor - Google Patents

Abstract

PURPOSE:To obtain an air lift type slime remover free of uneven sucking performance by a method in which an umbrella-shaped casing with opened lower face is attached to the lower end of a sucking pipe, and a plurality of vertical partition plates are provided on the upper inside of the casing. CONSTITUTION:An umbrella-shaped casing 3 with opened lower face is attached to the lower end of a sucking pipe, and partition plates 4 are vertically provided on the inside of the casing 3. The device is then penetrated into a trench excavated, air is sent through an air sending pipe 1 into the casing 3, and slime on the bottom of the trench is sucked up by an air lift system and discharged onto the ground's surface. Since the slime is sucked up facially by the casing 3 of this device, the slime can be evenly and completely removed.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention is applicable to the construction of underground continuous walls, continuous wall rigid foundations, cast-in-place piles, etc. after underwater excavation using a stabilizing liquid. This invention relates to a slime processing device for removing earth and sand left behind after digging.

[Conventional technology]

Slime is soil disturbed by excavation machines and soil suspended in stabilizing liquid that settles at the bottom of an excavation.If concrete is poured as is, it will cause a decrease in concrete strength, subsidence of foundation structures, decrease in bearing capacity, and joints. This may cause problems such as a decrease in water-stopping properties. Therefore, it is necessary to sufficiently remove slime during construction, and conventional slime treatment methods include an air lift method, a suction pump method, and a sand pump method.

Figure 8 shows slime processing using the conventional air lift method, in which a slime processing device consisting of an air inlet pipe a and a suction pipe b connected to an air compressor is submerged in a stabilizing liquid. The air blown out from the air pipe a to the bottom of the excavation and the blown up slime can be sucked up to the ground and discharged together with the stabilizing liquid by the suction pipe b.

[Problem that the invention seeks to solve]

By the way, when considering an underground continuous wall, the slime, etc. to be treated is precipitated on a flat surface in an average manner within the range of the excavation groove width and element length.

On the other hand, in the conventional method described above, since the image is picked up and processed at a local position on one plane, there are the following problems.

■ It becomes uneven and the slime cannot be completely removed from all areas.

■ When the slime is processed, the remaining slime flows out and the slime lands on the bottom again.

■ During processing, the suction pipe of the air lift must be constantly moved, resulting in large unevenness and long working hours.

The slime processing apparatus of the present invention is intended to solve the above-mentioned problems, and is intended to completely process slime and enable the construction of high-quality underground structures.

[Means for solving problems]

The slime processing device of the present invention is different from the conventional air lift type device by providing a box 3 at the lower end of the blow-up pipe 2, arranging the partition plate 4, air injection holes 5, etc., and depositing the slime in a two-dimensional manner. The slime 7 can be sucked in and collected in a plane with a certain strength and speed by the box 3 for processing.

The box 3 extends downward and has a plurality of vertical partition plates 4 inside the upper part of the body with an open lower end surface, as well as a plurality of air injection plates for connecting to the air supply pipe 1. A hole 5 is provided.

The partition plates 4 are arranged, for example, in a radial pattern, and air 8 is ejected from a plurality of air injection holes 5, and the slime 7, which is blown upward after cleaning into the grooves between the partition plates 4, is mixed with the stabilizing liquid 10 and the air 8.
The resulting mixture 9 is pumped up from the suction pipe 2 and discharged.

〔Example〕

Next, the illustrated embodiment will be described. This example is an example of use for an underground continuous wall, and uses a box 3 that is rectangular in plan view, but in the case of installing cast-in-place piles, a circular box, etc., is used in plan view. be able to.

Figure 1 shows the outline of the entire device. Air 8 sent from a compressor 13 passes through an air supply pipe 1 and is injected into a box 3 attached to the tip of a suction pipe 2. Ru. The slime 7 accumulated at the bottom of the excavation is blown up by the jet of air 8, becomes a mixture 9 together with the air 8 of the air lift and the stabilizing liquid 10, and is discharged to the ground from the suction pipe 2. In the figure, 1a is a connection pipe of the air feed pipe 1, 1b is a distribution pipe for feeding air 8 into the plurality of air injection holes 5 provided on the top of the box 3, and 4 is a pipe provided on the inside top of the box 3. This is a guide wall for constructing an 11-sided underground continuous wall.

12 to 4 show the box 3 and its accessories, and the main body of the box 3 includes a partition plate 4 and an air injection hole 5.
is provided and connected to the suction pipe 2.

The width of the box 3 is, for example, about 20 Q *m shorter than the width of the excavation groove, and the length is about twice the width.

In addition, depending on the element length of the excavated trench, this device can be used for 2 to 3 times.
You can set the rows and process slime for one element at the same time. The upper part of the box 3, that is, the ceiling part, slopes upward toward the center, and is connected to the suction pipe 2 at the center.

In this embodiment, the partition plates 4 are radial from the central part of the box 3 toward the side plates, and are a combination of one that extends to the suction pipe 2 in the center and one that extends halfway.

The hanging height from the top of the box 3 is approximately 2/6 of the height of the box.

Air injection holes 5 are provided in the case 3 at every other groove between the partition plates 4.
In the figure, the groove with the air injection hole 5 is shown as 4a, and the groove without the air injection hole 5 is shown as 4b. Furthermore, in order to enhance the effect of blowing up the slime, it is desirable to be able to adjust the nozzle injection angle from the distribution pipe 1b at the position of the air injection hole 5.

In addition, a suction hole 6 is provided in the side plate of the box 3 for each groove 4b that does not have an air injection hole 5, so that during air lift, the slime outside the box 3 is also absorbed into the box 3 together with the stabilizing liquid 10. Make it so that it can be inhaled and expelled. The size of the suction hole 6 is preferably large, medium or small depending on the soil quality to be excavated.

The height is approximately up to the lower end of the partition plate 4.

"・Figure 5ta), (bl, ((ri, (dl)
shows the effect of air lift by this device.

Due to the jet of air 8, the slime 7 at the bottom floats into the stabilizing liquid 10, forming a mixture 9 (see Fig. 5(a)).
. The air 8 is purified on the ceiling of the box 3 and heads toward the central suction pipe 2, forming an air lift (see Figure 175 fb).

Regarding the groove 4b, since the mixture 9 inside the box 3 is sucked up from the suction pipe 2, the external stabilizing liquid IO and the slime 7 enter the box 3 together through the suction hole 6 (see Figure 5 (e). )), the slime 7 is lifted up by the water flow at the bottom to form a mixture 9 and is discharged from the suction pipe 2 (see Fig. 5 (d)).

By repeating the above operations, the slime 7 at the bottom of the excavation is completely removed.

Figures 6 and 7 show the situation when the stabilizer 12 is attached, and the stabilizer 12 becomes a guide plate on the hole wall surface when the slime treatment is completed and the slime is lifted. 12a in the figure is a reinforcing rib.

〔Effect of the invention〕

- Since the device of this invention simply sucks and collects slime using the box at the tip of the suction pipe, no slime is left behind when removing slime.

■ Work efficiency is improved because slime is removed in a flat plane without moving the suction pipe.

■ Partition plates and air injection holes are arranged inside the box, and the precipitated slime is gently and with a certain force raised into the stable liquid by the air jet pressure, and is collected and rises. Can be completely removed over a wide range.

■ Because the slime treatment is complete, the quality of underground continuous walls and cast-in-place piles is guaranteed, and high-strength foundation structures can be constructed.
It is also possible to satisfy the requirement of using the main body of an underground continuous wall.

[Brief explanation of drawings]

Fig. 1 is a sectional view schematically showing the entire device in an embodiment of the present invention, Fig. 2 is a front view of the box, Fig. 6 is a bottom view, Fig. 4 is a longitudinal sectional view, and Fig. 5 is a longitudinal sectional view. (a), (b
), tc), and (d) are longitudinal sectional views showing the action, Figure 6 is a side view when the stabilizer is attached, the off view is also a plan view, and Figure 8 is a sectional view showing a conventional example. 1... Air supply pipe, 1a... Connection pipe, 1b... Distribution pipe, 2...
・Suction pipe, 3...Box, 4...Inner partition plate, 4a, 4b...Groove, 5...Air injection hole, 6... ... Suction hole, 7... Slime, 8... Air, 9... Mixture, 10.
...Stabilizer, 11...Guide wall,
12... Stabilizer, 12a...
Reinforcement rib, 13... Compressor, a...
... Air supply pipe, b ... Suction pipe 1, Fig. 1 Fig. 2 Fig. 3 Fig. 6 Fig. 7 Fig. 8

Claims (5)

[Claims] (1) Air lift type slime processing equipment consisting of an air inlet pipe connected to an air compressor and a suction pipe that simultaneously sucks up the air ejected from the air inlet pipe and the stabilized liquid containing the blown up slime. , a plurality of vertical partition plates are provided on the inside of the upper part of the umbrella-shaped main body that expands downward and has an open lower end surface, and a plurality of air injection holes for connecting to the air supply pipe are provided. A slime processing device characterized in that a box is connected to the tip of the suction pipe. (2) The slime processing apparatus according to claim 1, wherein the partition plates are arranged radially, and air injection holes are provided in the upper part of the box every other partition plate. (3) The slime processing device according to claim 1 or 2, wherein a plurality of suction holes communicating with the outside of the box are provided in the lower part of the box. (4) The slime processing device according to claim 1, 2, or 3, wherein the box body is rectangular in plan view. (5) The slime processing device according to claim 1, 2, or 3, wherein the box body is circular in plan view.