KR20110105100A - Construction method for underground watertight wall - Google Patents

Abstract

According to the present invention, the main casing 100 and the underground casing wall construction method in which a plurality of auxiliary casings 200 formed on both sides of the groove 210 for coupling with the main casing 100 are alternately installed, the main casing ( A perforation step of perforating the ground on which 100 is to be installed to form perforation holes 101 and backfilling with earth and sand; An auxiliary casing installation step of installing the auxiliary casing 200 on the ground between the drilling holes 101; A main casing installation step of installing a plurality of the main casings 100 by re-perforating the ground between the plurality of auxiliary casings 200 installed by the auxiliary casing installation step; A reinforcement step of installing the reinforcement 300 in the plurality of auxiliary casings 200 and the main casing 100; A concrete placing step of placing concrete in the plurality of auxiliary casings 200 and the main casing 100; A casing removal step of removing the auxiliary casing 200 and the main casing 100 before curing of the concrete poured by the concrete pouring step; By suggesting a method for constructing underground containment walls, it is possible to secure sufficient strength, which is an advantage of the cast-in-place casting pile method, and to obtain a high order effect.

Description

Underground wall construction method {CONSTRUCTION METHOD FOR UNDERGROUND WATERTIGHT WALL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of civil engineering, and more particularly, to a construction method of underground water line wall structures whose main purpose is earthquakes and orders.

At present, C.I.P. (cast in place pile) method, S.C.W. (soil cement wall) method and the like are mainly used as a method for forming walls in the ground for the purpose of soil barrier and order.

The cast in place pile (CIP) method is a kind of cast-in-place casting pile, which is a method of forming a earth wall by injection-type concrete after drilling to a predetermined diameter, and has the advantage of excellent strength because it forms a cast-heated rigid body. It has the disadvantage that the possibility of water leakage is great.

The SCW (soil cement wall) method is a method of forming a wall by injecting oil cement after drilling to the planned depth as a main heat-based underground wall, and forming a earth wall by inserting an H file as a stress material. On the other hand, it has the disadvantage of low strength.

That is, when the order wall structure requires high strength due to the condition of the site, the C.I.P. A column-type cast-in-place pile method, such as a construction method, may be appropriate. This basically takes a way in which one cast-in-place pile is formed by one casing, so that water flowing between each independently formed pile is blocked. There is a fundamental problem that is difficult.

In order to solve such a problem, an overlap arrangement method in which parts of each pile are overlapped with each other, a method of arranging piles in a shape of a pile, a wall made of soil cement between piles, or a separate basket by reinforcing baskets, etc. A method of installing a structure has been devised.

However, since none of them can achieve a perfect order effect, it is an urgent need to devise a construction method that can be appropriately applied to underground earthquake structures requiring high strength and orderability.

The present invention has been made to solve the above problems, and while providing a sufficient degree of strength, which is an advantage of the cast-in-place casting pile method, it provides a method of construction of the underground order wall to obtain a high order effect The purpose.

In order to achieve the object as described above, the present invention, the main casing 100 and the ground casing alternately provided with a plurality of auxiliary casing 200 formed on both sides of the groove portion 210 for coupling with the main casing 100 In the order wall construction method, the perforated step of drilling the ground on which the main casing (100) is to be installed to form a punching hole (101) and backfills with earth and sand; An auxiliary casing installation step of installing the auxiliary casing 200 on the ground between the drilling holes 101; A main casing installation step of installing a plurality of the main casings 100 by re-perforating the ground between the plurality of auxiliary casings 200 installed by the auxiliary casing installation step; A reinforcement step of installing the reinforcement 300 in the plurality of auxiliary casings 200 and the main casing 100; A concrete placing step of placing concrete in the plurality of auxiliary casings 200 and the main casing 100; A casing removal step of removing the auxiliary casing 200 and the main casing 100 before curing of the concrete poured by the concrete pouring step; We present the method of construction of underground containment wall.

The size of the drilling hole 101 for the installation of the main casing 100 is preferably larger than the size of the drilling hole 102 for the installation of the auxiliary casing 200.

The cross section of the main casing is a circular structure, the cross section of the groove portion of the auxiliary casing may be implemented by a curved structure.

The auxiliary casing installation step includes a main casing temporary installation step of temporarily installing the main casing on the ground; An auxiliary casing insertion step of inserting and installing the auxiliary casing into the main casing; A main casing temporary removal step of temporarily removing the main casing while maintaining the state of the auxiliary casing installed by the auxiliary casing insertion step; It is preferable to include.

The auxiliary casing inserting step may further include positioning the auxiliary casing in the center of the main casing by inserting a spacer between the inner surface of the main casing and the outer surface of the auxiliary casing.

The auxiliary casing inserting step may further include an auxiliary casing side filling step of filling the gap between the main casing and the auxiliary casing by backfilling a filler after the auxiliary casing inserting step.

The filler used in the auxiliary casing side filling step is preferably sand or low strength mortar.

In the concrete pouring step, the concrete pouring order is sequentially made from one end of the plurality of auxiliary casing and the main casing, the removal order of the auxiliary casing and the main casing in the casing removal step is concrete in the concrete pouring step It is preferable to be made sequentially according to the pouring order of.

After the auxiliary casing installation step, the main casing installation step, the reinforcement step, the concrete placing step and the casing removal step, adjacent to the primary underground order wall formed by the first operation according to the steps, according to the same configuration as the steps It is preferable to continuously form the secondary underground water order wall by performing the secondary work by the secondary auxiliary casing installation step, the secondary main casing installation step, the secondary reinforcement step, the secondary concrete placing step, and the secondary casing removal step. Do.

The auxiliary casing installation step and the main casing installation step includes a terminal auxiliary casing installation step of terminating the end by the end of the primary work in the state in which the auxiliary casing is installed, the reinforcement step, concrete pouring step and casing removal The step includes the step of forming the end of the primary underground order wall for removing the end auxiliary casing after performing the reinforcement and concrete pouring work in the end auxiliary casing, the second auxiliary casing installation step is the 1 First secondary auxiliary casing installation step of installing the first secondary auxiliary casing among the plurality of auxiliary casings at intervals at which the main casing by the second main casing installation step is installed on the side of the end portion of the vehicle underground order wall. Wherein the secondary main casing installation step includes an end portion of the primary underground order wall and the first secondary auxiliary casing. And the inclusion of the first secondary main casing installation step of installing the first secondary main casing of the plurality of the main casing is preferred.

The terminal auxiliary casing installation step includes a main casing temporary installation step of temporarily installing the main casing on the ground; An end auxiliary casing insertion step of inserting and installing the end auxiliary casing inside the main casing; A terminal secondary casing side filling step of filling the gap between the main casing and the terminal auxiliary casing by backfilling a filler; A main casing temporary removal step of temporarily removing the main casing while the end auxiliary casing installed by the end auxiliary casing inserting step is installed on the ground; And the end portion forming step of the primary underground order wall includes removing the terminal auxiliary casing after performing reinforcement and concrete placing work in the terminal auxiliary casing. It is desirable to finish with the filler in contact.

The filler used in the terminal auxiliary casing side filling step is preferably sand or low strength mortar.

The present invention provides a method of construction of underground order walls to ensure a sufficient degree of strength, while ensuring sufficient strength, which is an advantage of the cast-in-place casting method.

Figure 1 below shows an embodiment of the present invention,
1 is a plan view of a perforation work.
2 is a perspective view of one embodiment of an auxiliary casing;
3 is a plan view of the auxiliary casing is installed.
4 is a plan view of the auxiliary casing, the main casing installation and reinforcement work is completed.
5 is a plan view of the concrete pouring and casing removal work is completed.
6 is a plan view of the auxiliary casing is inserted into the main casing.
7 is a plan view of the side portion of the installed auxiliary casing backfilled with a filler.
8 is a plan view of a state in which an auxiliary casing for forming a secondary underground order wall is installed;
Figure 9 is a plan view of the secondary casing, the main casing installation and reinforcement work for the formation of the secondary underground water order wall is completed.
FIG. 10 is a plan view of a state in which concrete placing and casing removal work for forming secondary underground order walls are completed; FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown below in Figure 1, the present invention basically, the main casing 100 and the plurality of auxiliary casings 200 formed on both sides of the groove portion 210 for coupling with the main casing 100 alternately installed The underground order wall construction method is to be constructed by the following process.

First, perforating the ground on which the main casing 100 is to be installed to form a punching hole 101, and performs a pre-punching and backfilling work to fill the soil back (Fig. 1).

The auxiliary casing 200 is provided in the ground between the drilling holes 101 (Figs. 2 and 3).

Re-punch the ground between the plurality of auxiliary casings 200 installed by the above-described auxiliary casing installation step to install a plurality of main casing 100, the plurality of auxiliary casing 200 and the inside of the main casing 100 After installing the reinforcement 300, the concrete is poured (Fig. 4).

Prior to curing of the poured concrete, the order wall structure A is formed by removing the auxiliary casing 200 and the main casing 100 (FIG. 5).

That is, the auxiliary casing 200 and the main casing 100, which serve as formwork of the order wall structure A, are installed by mutually interlocking structures, and after the concrete is poured therein, casings before curing of the concrete (100,200). When removing, as the curing proceeds, the concrete placed inside the auxiliary casing 200 and the concrete placed inside the main casing 100 form a rigid bond with each other at their joints (dotted line in FIG. 5).

When the auxiliary casing 200 is installed first and the drilling operation for the installation of the main casing 100 is performed without performing the above-described drilling and backfilling operations, the contacting of the drilling equipment and the auxiliary casing 200 is performed. Breakage of the auxiliary casing 200 may occur, when the perforation and backfilling (by good quality earth and sand) are performed first, the perforation equipment can easily perform the re-punching operation, and the auxiliary casing 200. There is an effect that can prevent the risk of damage.

When the size of the drilling hole 101 for the installation of the main casing 100 is larger than the size of the drilling hole 102 for the installation of the auxiliary casing 200, the above-described effects can be obtained more stably. (Figures 1,3).

Therefore, the process according to the present invention is basically C.I.P. It is possible to obtain a high-strength wall structure that satisfies high strength and excellent ordering effect, since it is possible to completely block the water flowing between the piles while providing excellent strength by taking the construction of the column-type cast-in-place pile method such as the construction method. will be.

By forming the groove portion 210 for coupling with the main casing 100 in the auxiliary casing 200, the main casing 100 and the auxiliary casing 200 can form a concave-convex coupling structure as described above various implementations It may be implemented by example.

Figure 1 is a representative embodiment, the cross-section of the main casing 100 is formed by a circular structure, the cross-sectional view of the groove portion 210 of the auxiliary casing 200 is shown by a curved structure Hereinafter, an embodiment of the construction method according to the structure of the casing (100,200) of the present embodiment.

The auxiliary casing 200 may itself be typed into the ground or inserted after drilling, but in order to utilize the existing drilling equipment such as an auger as it is, as shown in FIG. ) Is temporarily installed on the ground, and after the auxiliary casing 200 is inserted into the main casing 100 to be installed, the installed auxiliary casing 200 maintains the state of the main casing 100 while being installed on the ground. It is desirable to take a temporary removal method.

In the operation of inserting the auxiliary casing 200 into the main casing 100 and the temporary removal of the main casing 100, the auxiliary casing 200 is located in the center of the main casing 100 in FIG. 6. As shown, it is preferable to insert the spacer 220 between the inner surface of the main casing 100 and the outer surface of the auxiliary casing 200.

As shown in FIG. 7, after the insertion of the auxiliary casing 200, the main casing 100 and the auxiliary casing 200 are filled by the backfill of the filling material 230. For installation, there is an advantage that the operation of drilling the area between the auxiliary casing 200 can be more smoothly.

For this purpose, it is preferable to use a filler 230 that is easy to punch, such as sand or low strength mortar.

In practice, concrete casing for a plurality of casing (100,200) and the removal of the casing (100,200) is difficult to be performed by one operation, so it will be made sequentially from some casing (100,200) toward a certain direction In this case, the concrete pouring work is sequentially made from one of the plurality of auxiliary casings 200 and the main casing 100, and the removal order of the auxiliary casings 200 and the main casing 100 is the concrete pouring. It is preferable to be made sequentially according to the pouring order of the concrete in the step.

In the construction method according to the present invention, it is important to remove the casings 100 and 200 before curing of the concrete placed on the casings 100 and 200 in order to obtain the integrally formed wall structure.

If the work wall cannot be completed in one day due to the large size of the order wall structure, there is a risk of water leakage at the joint between the part worked on the previous day and the part to be worked on the next day.

To prevent this, as shown in FIG. 8, the secondary sub-casing installation step 2 according to the same configuration as the above steps is adjacent to the primary underground order wall A formed by the primary operation according to the steps. By performing the secondary work by the primary main casing installation step, the secondary reinforcement step, the secondary concrete placing step and the secondary casing removal step, it is necessary to continuously form the secondary underground order wall (B).

More specifically, as shown in Figure 7, the end by the end of the primary work is terminated in the state in which the auxiliary casing 200a is installed, the reinforcement and concrete placement work inside the terminal auxiliary casing 200a After performing the step, by removing the terminal auxiliary casing (200a), a structure such as the first underground order wall (A) end of Figure 8 is formed.

During the work of the next day, the first secondary auxiliary casing 200b among the plurality of auxiliary casings 200 is installed at intervals at which the main casing 100 is to be installed at the end side side of the primary underground order wall A. FIG.

Thereafter, as shown in FIG. 9, the first secondary main casing 100b of the plurality of main casings 100b is disposed between the end portion of the primary underground order wall A and the first secondary auxiliary casing 200b. The rest of the casing (100,200) is installed in the same manner as in the case of the primary underground water order wall (A), and by removing the reinforcement, concrete pouring, casing (100,200) in the manner described above, the secondary Underground order wall B can be obtained.

The primary underground order wall (A) and the secondary underground order wall (B) constructed as described above form a continuous structure as a whole, as shown in FIG. 10, so that an excellent order effect is obtained even though the work proceeds for several days. There is an advantage that it can.

As shown in FIG. 8, when the terminal portion of the primary underground order wall A and the filler 230 are in contact with each other, the main casing 100 for forming the secondary underground order wall B is formed. ) Has the advantage of easy drilling for the installation of the first secondary main casing (100b), and for this purpose, the installation of the secondary auxiliary casing (200a) of the primary underground water order wall (A) and concrete pouring work as follows. It is necessary to proceed together.

After the main casing 100 is temporarily installed on the ground, and the terminal auxiliary casing 200a is inserted into the main casing 100 and then installed, the main casing 100 is interposed between the main casing 100 and the terminal auxiliary casing 200a. Is filled by the backfill of the filler 230.

The installed end auxiliary casing 200a temporarily removes the main casing 100 while maintaining the state of being installed on the ground, and performs the reinforcement and concrete pouring work in the end auxiliary casing 200a. By removing the casing 200a, it is possible to obtain a configuration in which the terminal portion of the primary underground order wall and the filler 230 are in contact with each other.

In this case, the filler 230 is also preferably used for easy drilling, such as sand or low strength mortar.

It is effective to take the following constitution to more secure the order of the connection portion between the primary underground order wall A and the secondary underground order wall B.

Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

A: Primary Underground Wall B: Second Underground Wall
100: main casing 101: punched hole
100b: first secondary main casing 200: auxiliary casing
200a: end secondary casing 200b: first secondary auxiliary casing
210: groove portion 220: spacer
230: filler 240: protrusion
300: reinforcement

Claims (12)

In the underground order wall construction method in which a plurality of auxiliary casings 200 formed on both sides of the main casing 100 and the groove portion 210 for coupling with the main casing 100 are alternately installed.
A perforation step of perforating the ground on which the main casing 100 is to be installed to form perforation holes 101 and backfilling with earth and sand;
An auxiliary casing installation step of installing the auxiliary casing 200 on the ground between the drilling holes 101;
A main casing installation step of installing a plurality of the main casings 100 by re-perforating the ground between the plurality of auxiliary casings 200 installed by the auxiliary casing installation step;
A reinforcement step of installing the reinforcement 300 in the plurality of auxiliary casings 200 and the main casing 100;
A concrete placing step of placing concrete in the plurality of auxiliary casings 200 and the main casing 100;
A casing removal step of removing the auxiliary casing 200 and the main casing 100 before curing of the concrete poured by the concrete pouring step;
Underground wall construction method including. The method of claim 1,
Underground wall construction method characterized in that the size of the drilling hole 101 for the installation of the main casing (100) is larger than the size of the drilling hole (102) for the installation of the auxiliary casing (200). The method of claim 1,
The cross section of the main casing (100) is a circular structure, the cross section of the groove portion 210 of the auxiliary casing (200) is an underground order wall construction method, characterized in that the curved structure. The method of claim 1,
The auxiliary casing installation step
A main casing temporary installation step of temporarily installing the main casing 100 on the ground;
An auxiliary casing insertion step of inserting and installing the auxiliary casing 200 into the main casing 100;
The main casing 200 installed by the auxiliary casing insertion step includes a main casing temporary removal step of temporarily removing the main casing 100 while maintaining the state installed in the ground;
Underground order wall construction method comprising a. The method of claim 4, wherein
The auxiliary casing insertion step
And inserting the spacer 220 between an inner surface of the main casing 100 and an outer surface of the auxiliary casing 200, thereby positioning the auxiliary casing 200 in the center of the main casing 100. Underground order wall construction method characterized in that. The method of claim 4, wherein
The auxiliary casing insertion step
After the sub-casing insertion step, the underground casing wall construction further comprises a secondary casing side filling step of filling the back of the filling material 230 between the main casing 100 and the auxiliary casing 200. Way. The method of claim 6,
The filler 230 used in the secondary casing side filling step is a ground order wall construction method, characterized in that the sand or low strength mortar. The method of claim 1,
In the concrete pouring step, the concrete pouring order
It is sequentially made from one of the plurality of auxiliary casing 200 and the main casing 100 is installed,
The removal order of the auxiliary casing 200 and the main casing 100 in the casing removal step is
Underground order wall construction method characterized in that made in sequence according to the order of placing concrete in the concrete placing step. The method of claim 1,
After the auxiliary casing installation step, main casing installation step, reinforcement step, concrete pouring step and casing removal step,
Adjacent to the primary underground order wall A formed by the primary operations according to the above steps, the secondary secondary casing installation step, the secondary main casing installation step, the secondary reinforcement step, 2 The secondary undercarriage wall construction method, characterized in that the secondary undercarriage wall (B) is continuously formed by performing the secondary work by the secondary concrete pouring step and the secondary casing removal step. 10. The method of claim 9,
The auxiliary casing installation step and the main casing installation step
And a terminal auxiliary casing installation step of terminating the terminal by the end of the primary work in the state in which the auxiliary casing 200a is installed.
The reinforcement step, concrete pouring step and casing removal step
After performing the reinforcement and concrete pouring work inside the end auxiliary casing (200a), and the step of forming the end of the primary underground order wall to remove the end auxiliary casing (200a),
The secondary auxiliary casing installation step
The first secondary auxiliary casing among the plurality of auxiliary casings 200 is spaced apart from each other at the terminal side of the primary underground order wall A by the second main casing installation step. The first secondary casing installation step of installing (200b),
The secondary main casing installation step
First secondary main to install the first secondary main casing 100b among the plurality of main casings 100b between the end of the primary underground order wall A and the first secondary auxiliary casing 200b. Underground order wall construction method comprising the step of installing the casing. The method of claim 10,
The terminal auxiliary casing installation step is
A main casing temporary installation step of temporarily installing the main casing 100 on the ground;
An end auxiliary casing insertion step of inserting and installing the end auxiliary casing 200a in the main casing 100;
A terminal secondary casing side filling step of filling the back casing of the filler material 230 between the main casing 100 and the terminal auxiliary casing 200a;
A main casing temporary removal step of temporarily removing the main casing 100 while the terminal auxiliary casing 200a installed by the end auxiliary casing insertion step maintains the state of being installed on the ground; Including,
The end portion forming step of the primary underground order wall
After performing the reinforcement and concrete pouring work in the terminal auxiliary casing (200a), by removing the terminal auxiliary casing (200a), the end portion of the primary underground order wall and the filler 230 contacted Underground wall construction method characterized in that the finish. The method of claim 11,
The filling material 230 used in the terminal auxiliary casing side filling step is a ground order wall construction method, characterized in that the sand or low strength mortar.

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