JPS5988523A - Dehydrating device of supersoft ground - Google Patents

Abstract

PURPOSE:To remove the void water of supersoft ground by a method in which a bar-like body having a large diameter part on its lower end and a water collecting chamber above the large diameter part is vibrated, and the lower end of a water pumping tube provided along the bar-like body from a drain pump device on the ground surface is connected to the water collecting chamber and the water is pumped up. CONSTITUTION:A large diameter part 6 having a water collection chamber 5 surrounded by a wall plate 4 with large number of through holes 3 is provided to the lower end of a bar-like body 2 having a vibrator 1 on its upper end. The other end of a water pumping tube 7 whose lower end is opened in the water collection chamber 5 is connected to a drain pump device 8 on the ground surface along the bar-like body 2. The device is hung down by a crane 12, etc., on hard ground and penetrated to a given depth into supersoft ground while vibrating the large diameter part 6 by the vibrator 1, and the drain pump device 8 is worked. Since void water of the nearby supersoft ground is sucked up, the usual soft ground can be improved in a short time.

Description

[Detailed description of the invention] This invention relates to a dewatering device for ultra-soft ground.

For the improvement of ordinary soft ground, artificially using MW
``Compaction'', which gradually increases the 'J[ by the natural action of the soil's own weight or the gravity of structures built on top of it], or artificially, by adding special admixtures. There are methods such as "stabilization" that improve properties such as soil shear force and retention of volumetric shape, but conventionally, soil
In order to improve ultra-soft ground, such as when a wetland has been reclaimed, it is first left to stand for a long period of time, and the above-mentioned ``consolidation'', in which the density gradually increases due to the natural action of the soil's own weight, takes place. After that, it is customary to carry out the above-mentioned ordinary method of improving soft ground, but the above-mentioned ``consolidation'' has the drawback of requiring a long period of time.

In view of the fact that there is a slope, this invention aims to drain pore water, which is contained in extremely large amounts between soil clay in ultra-soft ground, into a water collection chamber provided on a vibrating large-diameter part. At the same time, the water is sucked up to the ground using a drainage system, dehydrated, and the density is increased in a short period of time, in order to make the ground suitable for implementing the following conventionally known improvement method for soft ground in a short period of time. The purpose is to provide a dewatering device for ultra-soft ground.

The configuration of the dewatering device for ultra-soft ground according to the present invention will be explained in detail based on the illustrated example.As shown in FIG. At the lower end of the body, there are numerous through holes 3 around the periphery, as shown in an enlarged view in Figure 2.
A large-diameter portion Jf having a water collection chamber j surrounded by a wall board in which is perforated is provided, and the water pumping pipe 7 with its lower end opened in the water collection Mj is connected to the ground along the rod-shaped body λ. The other end of the pumping pipe 7 is connected to a drainage system on the ground. In Figure 2, ri is the reinforced wall plate, /θ is the water inlet, //
indicate the discharge pipes, respectively. Furthermore, the vibrating machine may be one in which an eccentric rotor is provided in the large diameter part B, and the rotor is rotated through the rod-shaped body 2. , the upper end of the water pumping pipe 7 that opens into the water collection chamber j is communicated with the drainage tank, and consists of a vacuum pump that evacuates the drainage tank and an IJ fergal pump that discharges the water sucked into the drainage tank. What you did is fine.

Since this embodiment has the structure as shown on paper, this device can be installed in a reclaimed area of the sea, lake, marsh or wetland on the surrounding vertical ground, for example, by installing one device from a crane 7.2, or By suspending a plurality of rod-like bodies, supplying power to a vibrator to operate the vibrator, inserting the rod-like body to the required depth while vibrating the large diameter part B at the lower end of the rod-shaped body, and continuing to operate there, and activating the drainage device g, The ultra-soft ground in the vicinity is gradually compacted by vibration and releases pore water that is good for vacuum action, and that pore water is used as a water collection room! The water collects inside and is further sucked up to the ground through the pumping pipe 7.

It is discharged to an appropriate location by the discharge pipe //, and the ultra-soft ground near where the large-diameter portion B is inserted is compacted in a short time.

Since this invention has the structure and function as described on paper, if the required number of devices according to this invention are used on ultra-soft ground, ordinary soft ground improvement methods can be applied to ultra-soft ground in an extremely short period of time. The ground can be improved to a certain extent.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the working state of a working example of a dewatering device for ultra-soft ground according to the present invention, Fig. 1 is an enlarged partially cutaway front view of the large diameter section, and Fig. 3 is an Hx diagram. Each cross-sectional view taken along the middle layer line is shown. 2 is a rod-shaped body, j is a water collection chamber, O is a large diameter part, 7 is a pumping pipe, g
1 and 2 respectively indicate drainage pump devices.

Claims (1)

[Claims] A rod-shaped body having a large-diameter portion at its lower end and a water collection chamber at its upper portion is provided so as to be able to vibrate. The other end of the pumping pipe 7 is connected to a drainage pump device J on the ground.
, connected to f'f: Characteristic dewatering equipment for ultra-soft ground.