JPS6053133B2 - Vibration dewatering acceleration type ground compaction equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for improving loose ground with a high moisture content, which is expected to have a compaction effect due to vibration.

Conventionally, when improving the ground, the ground is vibrated and excess pore water generated by sedimentation of soil particles is drained to the ground through upward flow, or sand columns are installed to allow capillary action to reach the ground. I was trying to drain it. The present invention provides a device that can compact the ground more effectively than the above.

That is, an object of the present invention is to collect excess water in the ground within the vibrating body at a location close to the vibration source where excess pores are generated, thereby shortening the flow distance of excess water and increasing the dehydration effect. The aim is to improve the consolidation and compaction effects of the ground. An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, 1 is loose sandy or silty ground with a high water content, 2 is a vibrating body inserted into the ground 1 to dehydrate excess pore water and compact the ground 1, and 3 is a pumping body. This is a vibrating machine (for example, a bipro hammer) that is guided by a leader 5 attached to a heavy machine 4 and inserted into the ground 1 while vibrating the vibrating body 2 in the vertical direction. Here, the vibrating body 2 will be explained in detail based on FIG.
is formed into a hollow cylindrical shape with an open upper end and a bottom, and its bottom 2a is tapered and a drain port 6 is provided at its lowermost end. Note that 7 is a plug for the drain port 6. A large number of through holes 8 are provided around the hollow cylindrical portion 2b of the vibrating body 2, and each of the through holes 8 is provided with a filter (not shown). Further, a plurality of tamping protrusions 9 are provided around the lower portion of the hollow cylindrical portion 2b. In addition, in Figures 1 and 2, 10
11 is a submersible pump provided in the bottom 2a of the vibrating body 2;
- is the same drainage hose; 12 is an airtight lid provided at the upper end opening of the vibrating body 2; 13 is a vacuum pump connected to the airtight lid 12 via a flexible tube 14; each of the above parts 10 to 14 will be described later. However, it is used depending on the nature of the ground.

According to the above configuration, the vibrating body 2 is positioned on the ground 1 to be improved, the vibrator 3 gives vertical vibration to the vibrating body 2, and this vibration is used to move the vibrating body 2. As it is inserted into the ground 1, the density of the ground 1 is increased and compaction is performed.

As the vibrating body 2 moves into the ground 1, excess pore water A enters the vibrating body 2 through the through holes 8 provided around the vibrating body 2 and is stored in the bottom 2a thereof.
This stored excess pore water A is forcibly drained via the submersible pump 10 and drainage hose 11 provided in the bottom 2a in the ground with a large amount of water, and in the ground with a small amount of water, the vibrating body 2, and when the vibrating body 2 is pulled out, the plug 7 at the lower end is removed and the water is drained from the drain port 6. Furthermore, in ground with relatively low water permeability, an airtight lid 12 is provided at the upper end opening of the vibrating body 2, and a vacuum pump 13 is connected to this via a flexible tube 14. The vacuum pump 13 may be activated to draw excess pore water in the ground into the vibrating body 2 when the vibrating body 2 is inserted to a depth of . The tamping protrusions 9 provided on the outer periphery of the vibrating body 2 use vertical vibration to compact the soil in the ground 1 from below to gradually upward when the protrusion is pulled out, thereby increasing the compaction effect of the ground. - can be increased. Furthermore, it is not necessary to use a single vibrating body, and a plurality of vibrating bodies may be inserted into the ground at the same time to enhance the compaction and dewatering effects of the ground. As described above, according to the present invention, C
As well as compacting the ground, excess pore water in the ground can be drained into the vibrating body, and compared to conventional systems, the distance traveled by excess pore water is extremely shortened, and the direction of movement is changed from upward to horizontal. Therefore, the dehydration effect of the ground becomes extremely good, and the compaction effect of the ground can be improved.

In addition, excess pore water stored in the vibrating body is forcibly drained out via a submersible pump and drainage hose placed in the bottom of the ground where there is a large amount of water; The water can be stored in the bottom of the vibrator, and when the vibrating body is pulled out, the plug at the bottom can be removed and the water can be drained from the drainage port.Furthermore, in ground with relatively low permeability, the opening at the top of the vibrating body can be airtight. A vacuum pump is connected to this via a flexible tube.
By activating the vacuum pump when the vibrating body is inserted to a predetermined depth, excess pore water in the ground can be drawn into the vibrating body, making it possible to handle various types of ground with different soil types. Further, since the tamping protrusions are provided on the outer periphery of the vibrating body, the tamping effect is increased.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall view, and FIG. 2 is an enlarged view of the main parts. 1... Ground, 2... Vibrating body, 2a...
...Bottom, 2b...Hollow cylindrical part, 3...
...Exciter, 4...Lifting machine, 8...Through hole, A...Excess pore water.

Claims (1)

[Claims] 1. A vibrating body that is vibrated by an exciter supported by a lifting machine to compact the ground is formed into a hollow cylindrical shape with an open upper end and a bottom, and a drain port with a plug is provided at the lower end, and A number of through holes each having a filter are provided in the hollow cylindrical part, and a plurality of tamping protrusions are provided around the lower part of the hollow cylindrical part, and a submersible pump, a drainage hose, and an opening at the upper end of the vibrating body can be arranged in the vibrating body. What is claimed is: 1. A vibration dehydration promoting soil compaction device comprising: an airtight lid that can be sealed; and a vacuum pump connected to the airtight lid via a flexible tube.