JPS5916052B2 - Slime processing method and device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a slime processing method and apparatus.

Generally, in cast-in-place piles using the earth drilling method, sedimentation and treatment of slime is the biggest bottleneck in terms of pile accuracy and work.

For example, a slime processing method in which a steel packet is sunk to the bottom of the hole immediately after drilling is completed, waits for the slime to settle, and after the settling is completed, the bottom is scraped by pulling up the packet, which is similar to using an air lift to disturb the slime. It is said to be the simplest and most reliable treatment method as it does not require stirring and dispersion. However, even with this method, there is a large loss of working time due to waiting for precipitation (usually about 30 to 90 minutes), and the process is difficult. In addition, slime may settle even after the bottom has reached the bottom and before the concrete is poured, and this can be especially severe if the concrete is delayed for some reason, such as when the ready-mixed concrete truck arrives at the site due to traffic conditions. However, there are still problems such as the amount of precipitation resulting in unfavorable accuracy.

The present invention provides a slime processing method and apparatus that can solve these problems.

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

First, to explain the slime processing device according to the present invention, FIG. 1 shows the slime processing device, and 1 is a hanging device made of a wire rope or the like, and at the lower end, a tarpaulin sheet (product name), canvas, etc. A slime storage bag 2 made of a flexible material is connected with its mouth facing upward.

The bag 2 includes a pair of upper and lower rubber rings 3a and 3b made of rubber hose or the like, and the rubber rings 3a at both upper and lower ends.
, 3b are inserted through the steel rings 4a.

A skeleton consisting of a plurality of steel rods 5 having 4b is fixed, and the skeleton urges the opening of the bag 2 to an open state, and also prevents the slime from acting on the bag 2 when it is pulled up by the hanging tool 1. The ring shape of the rubber rings 3a, 3b is broken by loads such as the weight of the bag and the resistance due to water, and the openings of the rubber rings 3a and 3b are closed, forming a deflated bag-like shape.

4'a is a guide for holding the mouth of the bag 2 concentrically with the center of the pile.

FIGS. 2 and 3 show another embodiment, in which a plurality of support rods 7 are provided at the lower end of the hanging device 1 in a radial shape and are biased to swing in the expanding direction by a leaf spring 6. The lower ends of these support rods 1 are connected to the mouth of the bag 2. In this embodiment, the mouth of the bag 2 is also biased to the open state, and the bag 2 is suspended. When the bag 2 is pulled up by the tool 1, the load acting on the bag 2 closes the mouth part, forming a deflated bag-like shape.

Incidentally, in both of the above embodiments, an iron plate may be placed at the bottom of the bag 2 so that the bag 2 easily deflates when being pulled up.

Next, the slime processing method according to the present invention will be explained step by step.

(2) Immediately after the excavation is completed, the slime processing device as described above is inserted into the excavation hole, and the slime storage bag 2 is set at the bottom of the hole.

The top of the hanging tool 1 is fixed to a suitable auxiliary tool 8 installed at or near the top of the casing, as shown in FIG. 4A.

- As shown in Figure 4, Part 3, C, 2, immediately after setting the bag 2, insert the reinforcing bar basket 9 into the excavation hole.

In this case), by passing one wire rope 10 through the reinforcing bar basket 9 in advance and connecting it to the hanger 1 of the bag 2, the reinforcing bar basket 9 can be inserted without any trouble.

In addition, the reinforcing bar cage 9 can be inserted to the bottom of the hole with sufficient force ζ In this embodiment, since a guide 4'a is provided at the mouth of the bag 2, a holder 9' made of a steel pipe or the like is used to insert the reinforcing bar The lower end position of the basket 9 is maintained at an appropriate level h above the bag 2.

(2) Next, as shown in FIG. 4E, the tremie tube 11 is inserted.

(2) Thereafter, as shown in FIG. 4, the bag 2 is pulled up via the hanging device 1, and the slime deposited in the bag 2 is discharged to the ground.

In this case, while the bag 2 is submerged in the bottom of the hole, the mouth is kept open, but when it is pulled up, the slime weight and water resistance act on the bag 2, so the mouth closes. , transforms into a deflated bag-like shape.

Therefore, even if the reinforcing bar basket 9 or the tremie tube 11 is inserted, the bag 2 can be pulled up.

Note that after the bag 2 is deflated, the holder 9' of the reinforcing bar cage 9 is removed and the reinforcing bar basket 9 is sunk to the bottom of the hole.

Immediately after pulling up the 0 bag 2, concrete is poured using the tremie pipe 11, as shown in FIG.

FIG. 5 is a time chart showing a comparative example of the slime processing method described above and the conventional method.

In the figure, A indicates the conventional method, B indicates the slime processing method according to the present invention, and the numerical values indicate the required time.

As is clear from the figure, in Method B, the reinforcing steel pipes and tremie pipes are set at the same time while waiting for the slime to settle, so there is no loss in waiting time.
The time required for each pile can be reduced by about 40 minutes, and the accuracy of the piles can be improved because the bottom roughening is carried out immediately before concrete pouring.

As described above, according to the present invention, by pulling up the slime storage bag through the hanging tool, the mouth portion closes and the bag becomes deflated, so that the reinforcing bar cage or tremie pipe is located in the excavation hole. It is also possible to pull up the bag.

Therefore, we were able to eliminate wasted waiting time by inserting reinforcing bar baskets and tremie pipes during the waiting time for slime sedimentation, and moreover, slime processing (pulling up bags) immediately before concrete pouring. By doing so, accuracy can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of a slime processing device, FIG. 2 is a perspective view of another embodiment, FIG. 3 is a sectional view of the main part, and FIG. FIG. 5, which is a process diagram of the slime processing method, is a time chart comparing the above slime processing method and the conventional method. 1... Hanging 5 eyes, 2... Slime storage bag.

Claims (1)

[Scope of Claims] 1. A slime storage bag connected to the lower end of the hanger and configured so that the mouth part is biased to the open state and closed by the load applied when pulling up the slime is inserted into the excavation hole. A slime processing method comprising sinking the slime storage bag into the bottom of the excavation hole, inserting a reinforcing bar basket and a tremie tube into the excavation hole, and then pulling up the slime storage bag. 2. A slime processing device in which a slime storage bag is connected to the lower end of the hanger, the opening of which is biased to an open state and whose opening is closed by the load applied when lifting.