JPS5939572B2 - Earth removal device for pile press-in construction - Google Patents

Description

[Detailed Description of the Invention] This invention is applied to press-in construction of ready-made piles with a hollow cross section such as steel, comfort, or steel pipe concrete composite piles. This relates to an earth removal device used in the press-in construction of piles to prevent the scattering of soil and facilitate its discharge.6Generally, the press-in construction of piles is performed as shown in Figures 1 and 2 The auger motor 3 hydraulic cylinder 11°12 is attached to the guide rail installed on the leader 2 of the pile driver 1.
The upper end of the pile 4 is held in the pile cap 5, and the pile 4 is press-fitted into the pile by a tip bit 9 of a screw auger 6 which is rotatably inserted into the pile 4.

However, conventionally, the earth and sand discharged during pile press-in work has been discharged outward from an opening 5a provided at the top of a pile cap 5 that holds the pile 4.

Therefore, since the pile cap 5 is located at a high place when the pile 4 is started to be press-fitted into the trench, the discharged earth is scattered outside and contaminates the surrounding area.

In addition, in most of the currently used pile press-in methods, the excavation is performed while injecting compressed air from the air hole provided in the bit at the tip of the screw auger 6 to facilitate the discharge of earth and sand. Because of this, the discharged soil is also discharged with force, which has the disadvantage that the scattered soil is further spread out.If the discharge of soil is delayed, the internal pressure of the pile increases, which may cause damage such as cracks to the pile. There was a problem that occurred.

This invention was made in order to improve the above-mentioned drawbacks of the conventional construction method. To provide an earth removal device for pile press-in construction, in which the earth is accumulated in an earth removal hopper without any delay, and the earth removal hopper is configured to be freely movable up and down.

Hereinafter, one embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5.

FIG. 3 is a schematic explanatory diagram of the main parts of a pile press-in machine equipped with an earth removal device according to the present invention, in which 1 is a pile driver, 2 is a pile driver;
3 is a leader having a guide rail 2a, and 3 is a leader 2.
This is an auger motor mounted on the guide rail 2a so as to be able to move up and down.

4 is a ready-made pile having a hollow cross section, and its upper end is held by a pile cap 5 provided below the auger motor 3.

A telescopic earth removal pipe 10 is connected above the pile cap 5 that holds the pile 4, and can be vertically expanded and contracted by pile press-in device hydraulic cylinders 11 and 12 installed on the left and right sides. ing.

The earth removal pipe 10 includes a fixed pipe 10a and a movable pipe 1.
It has a double pipe structure of 0b, and a screw auger 6 for medium excavation of the pile 4 is communicated with the inside, forming an earth discharge passage for scraping up the excavated earth and sand.

At the upper end opening of the fixed pipe 10a of the earth removal pipe 10, an earth removal receiver 14 having an earth removal traversing device 13 is provided.

A soil discharge chute 15 is provided on the side of the soil discharge receiver 14, and the soil discharge hopper 1 is located below the soil discharge chute 15 and can be freely moved up and down on the guide rail 2b of the leader 2.
6 is provided.

The earth removal lateral feeding device 13 has a belt conveyor or a screw conveyor installed on the left and right sides of the upper end opening of the fixed pipe 10a, and is driven by an electric motor 17, so that it collects the earth and sand scraped up by the screw auger 6. The soil is transported to the soil discharge chute 15 located on the side of the soil discharge receiver 14.

Therefore, the earth and sand conveyed to the earth removal chute 15 is deposited in the lower earth removal hopper 16.

After the earth and sand accumulated in the earth removal hopper 16 is lowered to near the ground, the earth and sand accumulated in the earth removal hopper 16 are discharged to the discharge port 1 as appropriate.
Open 6a and discharge into a vessel or the like.

As explained in detail above, the earth removal device for pile press-in construction according to the present invention has a double pipe structure consisting of a fixed pipe and a movable pipe above the pipe cap that holds the pile. A soil receiving device equipped with a horizontal soil transport device is attached to the top opening of the soil discharging pipe, and the soil discharged through the soil chute of this soil receiving pipe is transferred to a soil discharging hopper that can be moved up and down. Since the structure is simple and the soil can be discharged sequentially without interfering with the soil being scooped up from inside the pile, it is possible to prevent the soil removal hopper from becoming full of soil. Since it is lowered close to the ground, it is sure to discharge into a vessel, etc., and the earth and sand will not be scattered.

Accordingly, the problem of polluting the surrounding area can be solved by eliminating the need to scatter soil and sand from high places to the outside as in the conventional method, and since the soil can be discharged to the outside without delay, abnormally high pressure in the hollow part of the pile can be prevented. There is no risk of damaging the pile, and the soil being discharged is deposited in a designated soil removal hopper, and the hopper is lowered to near the ground and the discharge port is opened as needed to discharge the soil. It has great industrial value, such as easy post-treatment of soil and the ability to improve work efficiency.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram of the main parts showing conventional press-in construction,
Figure 2 is a partially cutaway perspective view showing the main parts of Figure 1;
The figure is a schematic explanatory diagram of main parts showing an embodiment according to the present invention.
Figure 4 is an enlarged sectional view showing the main parts of Figure 3, and Figure 5 is an enlarged sectional view of the main part of Figure 4.
It is a sectional view taken along the line AA in the figure. 1...Pile driver, 2...Leader, 2a, 2b...
Guide rail, 3... Auger motor, 4... Pile, 5... Pile cap, 6... Screw auger, 10... Earth removal pipe, 10a... Fixed pipe, 1
0b...Movement pipe, 11, 12...Hydraulic cylinder, 13...Earth removal lateral feed device, 14...Earth removal receiver, 1
5... Soil removal chute, 16... Soil removal hopper, 16
a...Exhaust port.

Claims (1)

[Claims] 1. In the press-in construction of ready-made piles with hollow cross sections, a telescopic earth removal pipe is connected above the pile cap that holds the pile, and a screw auger for medium digging is connected to the earth removal pipe to scrape the excavated earth and sand. An earth removal passageway is formed, and an earth removal receiver having an earth removal lateral feed device is provided at the upper end opening of the earth removal pipe. An earth removal device for press-in pile construction, characterized by being provided with an earth removal hopper that can be moved up and down to deposit soil.