KR940003481B1 - Casing tube and working method of soil cement wall - Google Patents

Abstract

No content.

Description

Casing and casing recovery S.C.W earth wall method

1 is an example of construction sites in dense areas.

2 is an exemplary view in which S.C.W earth wall forming holes are drilled in the construction site of FIG.

3 is a partial plan view of the casing of the present invention inserted into the construction site.

4 is a side cross-sectional view of FIG.

5 is a bottom view of the casing of the present invention.

6 is an exemplary view of the earth wall construction up to the solid ground according to the present invention.

* Explanation of symbols for main parts of the drawings

1: soft ground 2: hard ground

3: hole 4: casing

5: S.C.W earth wall 7: Earth plate

41: curved surface 42: pneumatic pipe

43: Pneumatic dispersion pipe

The present invention relates to a SCW (SOIL CEMENT WALL) earth wall method, in particular, a casing invented to recover and reuse a casing used for installing an H file which is essential for the SCW earth wall construction as a whole from soft ground to hard ground. And a casing recovery SCW earth wall method.

The SCW earth wall method refers to the construction method to achieve the purpose of the order wall by stirring and mixing cement solution with a water-cement ratio of more than 100%, considering the earth and sand of the current location to be installed as an aggregate in its original state. It has the same characteristics.

First, there is almost no noise or vibration compared to the flavor type.

Second, it is economical because less soil is generated because field soil is used as aggregate.

Third, it is excellent in the degree of order because it can form a main heat wall having a high vertical accuracy.

Fourth, since the rigidity of the earth wall is high, structural stability to the surroundings can be achieved.

Fifth, it is relatively advantageous in the soft ground or in the area with a lot of water or where the adjacent buildings are concentrated.

Sixth, the earth wall does not need a separate earth plate, separate order construction.

Seventh, it is possible to make an excellent shortening.

Because of this feature, the current construction method or construction site with hard ground (rock) must use a separate H pile to form the earth wall using the earth plate.

That is, when it is to be installed in the area where the adjacent buildings are close as shown in FIG. 1, as the foundation work for forming the earth wall with the triaxial bit as shown in FIG. 2, the holes 3 are continuously connected to the soft ground 1 until the hard ground emerges. After being drilled to connect, the tubular casing 4 is repeatedly inserted into each of the two holes 3, and then the soil and cement discharged from the hole 3 are properly stirred and mixed with water (hereinafter referred to as a mixture). The mixture is injected into each hole (3), and the mixture is injected into the periphery of the casing (4) to cure, and the hole (3) where the casing (4) is not inserted is filled with the mixture to cure. (5) is to be formed, and then soft ground (1) is to be excavated.

After entering and exiting the soft ground (1), through the respective casing (4) to drill a hole (3) of a certain depth in the hard ground (2), insert the H pile (6) and excav the hard ground (2), When the H pile 6 is exposed due to the excavation of the hard ground 2, the earth plate 7 may be stacked to form the earth wall.

Thus, H pile 6 should be installed to form the earth wall in the hard ground. In this case, a separate casing 4 should be embedded for insertion and installation of the H pile 6, which is integrated with the formation of the earth wall. There was a drawback that construction costs could be raised because it could not be recovered.

The present invention is to solve the above-mentioned drawbacks, tapering the casing and then installing a pneumatic pipe therein and connected to the pneumatic pump, by dividing the lower portion of the pneumatic pipe in several directions to communicate with the bottom surface H Insert the casing before the mixture is cured to form a space for inserting the pile, so that the casing can be inserted by supplying water into the casing to infiltrate the mixture by its own weight and supplying high-pressure air with a pneumatic pipe. The mixture is crushed and lowered to the hard ground. After curing the mixture for 4-6 hours, the water in the casing is drained before the mixture is completely hardened. Then, the pneumatic pipe is supplied with high-pressure air again. The next construction site by collecting the casing by discharging upward Because it enables re-use and recovery by the above-described method will want to be able to achieve a reduction in loss of sigongbi prevention of the casing.

Hereinafter, the present invention will be described in detail by the accompanying drawings.

When the construction site is formed of the soft ground 1 and the hard ground 2 as shown in FIGS. 1 and 2, first, the SCW earth wall forming hole 3 is formed in the soft ground with the triaxial bits. 2) After being drilled in continuous connection to each other, the site soil and cement discharged from each hole 3 are properly stirred and mixed with water (hereinafter referred to as a mixture) and injected into each hole 3.

At this time, the mixture is filled in consideration of the volume of the casing 4 in order to insert the casing 4 repeatedly in each of the two holes 3 of the holes 3.

Thereafter, before the mixture is cured, the casing 4 is repeatedly inserted alternately every two holes 3 so that the lower end of the casing 4 is inserted up to the solid ground 2.

At this time, the casing 4 is a tapered tubular, the diameter (D) of the upper end is formed larger than the diameter (d) of the lower end, and the lower end is closed to form a curved surface 41, the casing ( 4) After installing the pneumatic pipe 42 in the longitudinal direction in the center portion, the upper end is connected to the pneumatic pump (not shown in the figure), and the lower end is connected to the plurality of pneumatic dispersion pipes 43 to be dispersed in the curved It is fixed to the surface 41 so that the high pressure or high pressure water is exhausted to the outside.

That is, the pneumatic dispersion pipe 43 is radially installed when viewed from below the casing 4 so that the pneumatic or high pressure water is radially injected.

The size of the casing (4) may be appropriately manufactured according to the construction site length, usually when the diameter of each hole 3 is 90cm, the upper diameter (D) of the casing (4) is 50cm, the lower diameter (d) Is made of 40cm.

Accordingly, when the casing 4 is inserted into the hole 3 filled with the mixture, water is filled in the casing 4 to dig the mixture by the weight of the casing 4, and at the same time, the pneumatic pipe 42 By supplying the pneumatic pressure ()) to be discharged to the pneumatic dispersion pipe 43 is to crush the mixture by the pneumatic pressure sprayed radially.

Therefore, the casing 4, which is gradually lowered by the self-weight and pneumatic pressure of the casing 4, is allowed to be inserted into the hard ground 2, and the mixture is cured to form the S.C.W earth wall 5.

After the formation of the SCW earth wall (5) excavates the soft ground until the hard ground of the construction site, and to insert and install the H pile (6), the casing (4) must be pulled out, at this time the water in the casing (4) After all of the water is drained, the high pressure water is supplied to the pneumatic pipe 42 to be distributed and supplied to the pneumatic dispersion pipe 43, so that the casing 4 can be discharged upward as if by a rocket.

That is, the high pressure water supplied through the pneumatic dispersion pipe 43 is sprayed to the boundary surface of the curved surface 41 and the SCW earth wall 5 of the casing 4, and the SCW earth wall 5 is fine even though the high pressure water is applied. Since the repulsive force of the high pressure water eventually acts on the curved surface 41, the casing 4 is pushed upward and is discharged.

At this time, the outer circumferential surface of the casing (4) may be frictional with the SCW earth wall (5), but is released before the SCW earth wall (5) is completely cured, which is significantly smaller than the high pressure water, and the casing (4) is tapered It is formed in a tubular shape and at the same time the weight of the water is light, so that it does not interfere with the discharge upward.

Of course, when the casing 4 is discharged, it is not released as fast as the rocket, but because the casing 4 supplies only enough pressure to escape from the S.C.W earth wall 5, the casing 4 is gradually released.

Insert the H pile 6 into the hole formed after the discharge of the casing 4, but first insert the H pile 6 by drilling a hole in the solid ground 2 so that the H pile 6 is inserted into the solid ground 2 or the H pile ( 6) Insert and install.

After inserting and installing the H pile 6, the hard ground 2 is excavated to the set depth, and the earth plate 7 is laminated between each H pile 6 in order to prevent ground collapse and drainage of groundwater. .

By installing the earth plate 7, the earth wall is formed, thereby completing the basic work of the construction site.

As described above, the present invention can reduce the construction cost by improving the structure of the casing to allow recovery and reuse.

Claims (2)

Casings for drilling SCW earth wall formation holes on the soft ground continuously connected to the hard ground, and then filling the mixture with each soil by filling a mixture of field soil and cement discharged from each hole with water with proper stirring. In the SCW earth process method to form the earth wall by forming the SCW earth wall to be buried, inserting the H pile into the casing and fixed to the solid ground and then install the earth plate, to form the casing in the tapered tube shape Fill the water to dig into the mixture that was not cured by its own weight, supply pneumatic pressure with pneumatic pipe installed in the casing, disperse it with pneumatic dispersion pipe connected radially to the lower part, and crush and insert the mixture so that the casing can be inserted easily. And casing before complete formation of the SCW earth wall by curing of the mixture After draining the water, the pneumatic pipe is supplied with high pressure water, and the pneumatic dispersion pipe is distributed to the lower curved surface of the casing and the boundary surface of the SCW earth wall, and the casing is buried to release the casing to the outside by the repulsive force against the high pressure water. Casing recovery SCW earth wall method, characterized in that to install the H-file in the installation. After drilling the SCW earth wall forming hole (3) in the soft ground (1) to the solid ground (2) continuously connected to each other, and then mixed with the soil and cement discharged from each hole (3) with water appropriately mixed Filled in each hole (3) to embed the casing (4) inserted into every two holes (3) to form an SCW earth wall, inserting the H pile (6) into the casing (4) hardened ground (2) In the SCW earth wall to which the earth plate (7) is installed and fixed to the earth wall to form the earth wall, the casing (4) is formed in a tapered tubular shape and the bottom end is closed to form a curved surface (41). After installing the pneumatic pipe 42 in the longitudinal direction in the central portion of the casing (4), the upper end is connected to the pneumatic pump, the lower end is connected to a plurality of pneumatic dispersion pipe 43 to be radially distributed curved surface 41 Fixed to the pneumatic or high pressure water curved surface 41 and the SCW earth wall (5) Casing for S.C.W earth wall construction, characterized in that the distributed supply between the casing (4) to insert and install.