KR102426192B1 - File fof retaining wall and construction method using file - Google Patents

Abstract

The present invention relates to a construction method of a retaining wall installed to prevent collapse of the ground when constructing an underground structure of architectural and civil engineering structures, and to a new type of pile used when constructing such retaining wall. According to the present invention, provided are a pile for a retaining wall and a construction method thereof, which can build strong and stable retaining walls, such as allowing concrete to be filled without material separation due to groundwater, by realizing a new construction method of inserting a hollow core beam into a casing and then lowering a tremie pipe of a mobile concrete pump into the core beam to the bottom of the casing so that the concrete rises up both inside and outside the core beam from the bottom of the casing.

Description

Retaining wall file and construction method {FILE FOF RETAINING WALL AND CONSTRUCTION METHOD USING FILE}

The present invention relates to a retaining wall pile and a construction method, and more particularly, to a method for constructing a retaining wall installed to prevent the collapse of the ground when constructing an underground structure of a building and civil engineering structure, and a method for constructing such a retaining wall. It's about a new type of file.

In general, retaining walls are temporary structures installed to prevent the collapse of the ground during the construction of underground structures of buildings and civil engineering structures. These retaining walls resist lateral pressures such as earth pressure and water pressure and prevent subsidence of the surrounding ground. It serves to protect adjacent structures.

That is, the retaining wall is a temporary structure that resists lateral pressure such as earth pressure and water pressure while preventing the inflow of soil or groundwater around the construction site during excavation.

Such a retaining wall includes various support holes and the like, and the retaining wall is installed on the excavation surface to prevent the collapse of soil in the excavation work.

In recent years, the depth and scale of underground structures for buildings constructed in downtown areas are increasing due to high land prices and securing parking spaces.

Accordingly, the importance of large-scale excavation and retaining walls has grown.

In general, retaining walls are largely divided into thumb piles, earth plates, board piles, columnar walls, and underground continuous wall retaining methods according to the materials constituting the wall and the type of support hole.

Recently, among the retaining methods, the Cast-In-Place Concrete Pile (CIP) method is mainly used to form a cast-in-place wall using H-beams and reinforcing bars as reinforcing materials for concrete.

The wall formed by the CIP method has a small effect on the surrounding ground because the displacement generated in the wall is not large as rigidity against lateral pressure is secured due to the use of the reinforcing material.

Therefore, the CIP method is currently being applied to most of the excavation works, as it is possible to construct close to the adjacent site, does not require special equipment, and has the advantage of being suitable for urban areas due to its low noise and vibration.

This CIP method is constructed by installing a casing as a temporary retaining method, then inserting an H-beam or rebar mesh, and pouring concrete. there are difficulties in

That is, despite the fact that a lot of groundwater flows into the casing in the past, the ready-mixed concrete trampoline could not be lowered to the bottom of the casing due to the interference of the H-beam or reinforcing bar. As the concrete is diluted with groundwater and the cement, sand and gravel are separated, the cement flows out of the casing and only the sand and gravel remain in the casing, resulting in poor retaining wall.

Laid-Open Patent Publication No. 10-2016-0025242 Registered Patent Publication No. 10-2075939 Registered Patent Publication No. 10-2228553 Registered Patent Publication No. 10-2325623

Therefore, the present invention has been devised in view of this point, and after inserting the hollow core beam into the casing, the tramway pipe of the pump car is lowered to the bottom of the casing into the core beam, and the concrete or mortar core beam is removed from the bottom of the casing. By implementing a new construction method that fills up both the inside and the outside, concrete or mortar can be filled without material separation due to groundwater. Its purpose is to provide

In order to achieve the above object, the retaining wall pile provided by the present invention has the following characteristics.

The retaining wall pile is inserted into the casing during construction of the retaining wall and constructed as a wall together with concrete, and is made of a hollow tube-shaped core beam, and the core beam wall of the core beam has a core beam inside. A plurality of through-holes are formed to allow the concrete to be filled out to the outside of the core beam, and the concrete to be filled in the core beam passes through the through hole to the outside of the core beam. It is characterized by filling as it fills.

Here, the core beam may be formed of a tube having a rectangular cross-section having four core beam walls.

In addition, the through-holes formed in the core beam wall of the core beam may be formed in the remaining three core beam walls except for the front one core beam wall in contact with the reinforcing beam side among the four core beam walls. They are arranged at regular intervals along the longitudinal direction of the core beam, and the through-holes formed in both the core-beam walls and the through-holes formed in the rear core-beam wall may be alternately arranged up and down.

Among the four core beam walls of such a core beam, the front core beam wall may have a relatively thicker thickness than the other three core beam walls.

As a preferred embodiment, the core beam may be provided with flange portions extending sideways with a predetermined width along the edge of the front core beam wall, or extending sideways with a predetermined width along the edges of the front and rear core beam walls.

On the other hand, the retaining wall construction method provided in the present invention in order to achieve the above object has the following characteristics.

The retaining wall construction method is a method of constructing a retaining wall by the CIP method, a first step of inserting a casing after drilling the ground, and a hollow tube shape inside the casing, and a plurality of penetrations in the core beam wall A second step of inserting a core beam having a hole formed therein, and a third step of pouring concrete into the casing into which the core beam is inserted.

In particular, in the third step, in a state in which the tramway pipe of the pump car is lowered to the lower end of the casing through the inside of the core beam, concrete is poured while raising the tramway pipe upward step by step, and the concrete is poured from the bottom to the top. However, it is characterized by pouring while allowing the concrete to be filled inside the core beam to escape to the outside of the core beam through the through hole so that the concrete fills up from the bottom of the casing to the top.

Here, the core beam used in the second step may be made of a tube having a rectangular cross-section having four core beam walls.

And, the through hole formed in the core beam wall of the core beam used in the second step may be formed in the remaining three core beam walls except for the front one core beam wall in contact with the reinforcing beam side among the four core beam walls, , In this way, the through holes formed in the core beam wall of the core beam used in the second step are arranged at regular intervals along the length direction of the core beam, and the through holes formed in both core beam walls and the rear core beam wall The through-holes formed in the may be alternately disposed above and below each other.

Among the four core beam walls of the core beam used in this second step, the front core beam wall may have a relatively thicker thickness than the remaining three core beam walls.

As a preferred embodiment, the core beam used in the second step has flanges extending sideways with a predetermined width along the edge of the front core beam wall, or extending sideways with a predetermined width along the edges of the front and rear core beam walls. An addition may be formed.

The retaining wall pile and construction method provided by the present invention has the following effects.

First, a new construction method and a new type of pile (core beam) that inserts a hollow core beam into the casing, lowers the tramway tube of the pump car into the core beam to the bottom of the casing, and allows the concrete to fill up from the bottom of the casing By applying this, there is an effect that it is possible to build a solid and stable retaining wall, such as allowing concrete to be filled without separation of materials due to groundwater.

Second, by applying a core beam that reinforces the thickness of the part connected to the reinforcing beam installed inside the retaining wall, the reinforcing beam can exert a strong bearing capacity. There is an achievable effect.

Third, by replacing the existing reinforcing bar network with a core beam, not only construction is easy, but also the construction period can be shortened, and workability in the field can be improved.

1 to 4 are perspective views showing a retaining wall pile according to various embodiments of the present invention;
5 to 7 are perspective views showing the construction state of the retaining wall pile according to various embodiments of the present invention;

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

1 to 4 is a perspective view showing a retaining wall pile according to various embodiments of the present invention.

1 to 3, the retaining wall pile is inserted into the inside of the casing 10 when the retaining wall is constructed and constructed as a wall 12 together with the concrete 11. It includes a core beam 13. do.

The core beam 13 is made of a core beam 13 made of a metal material having a hollow tube shape.

For example, the core beam 13 may be formed of a rectangular tube having a rectangular cross-section having four core beam walls 14 .

Here, of course, the core beam 13 may be formed not only in the shape of a square tube, but also in the shape of a circle, a polygon, or the like.

Such a core beam 13 may be manufactured integrally using a mold, may be manufactured by injection or extrusion, may be manufactured in the form of several long iron plates connected by welding, or one long iron plate and one bent type It can be manufactured in the form of connecting steel plates by welding.

As the inside of the core beam 13 becomes empty in this way, the tramway tube of the pump car can enter through the inner side of the core beam 13 to the lower end of the core beam, that is, the lower end of the casing 10 without any interference. When the concrete 11 is poured using the tramway pipe, when the concrete 11 is poured from the lower end of the casing 10, the concrete 11 at this time is filled up from the bottom of the casing 10 to the top. can be filled.

In particular, a plurality of through holes 15 are formed in the core beam wall 14 of the core beam 13 through which the concrete 11 filled inside the core beam can escape to the outside of the core beam.

At this time, the through hole 15 may be formed in a circular hole shape or the like.

Accordingly, the concrete 11 filled in the inside of the core beam 13 passes through the through hole 15 to the outside of the core beam 13 , that is, between the outer surface of the core beam 13 and the inner surface of the casing 10 . It is possible to escape into the space of the , and eventually the inside of the casing 10 can be filled with the concrete 11 from the bottom of the casing to the top.

In addition, the through-holes 15 formed in the core beam wall 14 of the core beam 13 are the remaining three except for the front one core beam wall 14 in contact with the reinforcing beam side among the four core beam walls 14 . It can be formed in the core beam wall 14 .

That is, the through hole 15 can be formed in the core beam wall 14 on both sides and the rear side except for the front side.

As a preferred embodiment, the through-holes 15 may be disposed at regular intervals along the longitudinal direction of the core beam 13 .

At this time, the through-holes 15 formed in both core beam walls 14 and the through-holes 15 formed in the rear core beam wall 14 can be alternately arranged up and down.

For example, the through-holes 15 formed in the core beam wall 14 on both sides can be disposed at positions facing each other, and the through-holes 15 formed in the core beam wall 14 at the rear side are formed on both sides. It can be arranged at a position between the upper and lower through-holes 15 in the core beam wall 14 of the

By displacing the through-holes 15 formed in the core beam wall 14 on both sides and the through-hole 15 formed in the rear core beam wall 14 in a zigzag form, the core beam 13 due to hole formation ) can be effectively prevented from weakening.

As a preferred embodiment, the front core beam wall 14 among the four core beam walls 14 of the core beam 13 may have a relatively thicker thickness than the other three core beam walls 14 . have.

By adopting a structure for supporting a reinforcing beam (not shown) using the front core beam wall 14 made of such a thick thickness, there is an advantage in that a strong binding relationship between the core beam 13 and the reinforcing beam can be secured.

That is, by setting the overall thickness of the core beam 13 as thin as possible in accordance with the design standard and thickening only the front side, which requires securing the support force of the reinforcing beam, the overall structural rigidity of the retaining wall can be reduced while maintaining the design standard. It has advantages in terms of cost as well as constructability.

As an embodiment, the core beam 13 is formed with a flange portion 16 extending sideways with a predetermined width along the edge of the front core beam wall 14 (see FIG. 1 ), at this time the flange portion (16) serves to provide a sufficient area to mount the reinforcing beam and the bracket (not shown).

As another embodiment, flange portions 16 extending from both sides of a predetermined width along the edges of the front and rear core beam walls 14 are formed on the core beam 13 (see FIG. 3 ), and even at this time, the flange portions (16) serves to provide a sufficient area to mount the reinforcing beam and the bracket (not shown).

On the other hand, in the present invention, a core beam 13-1 is provided as a substitute for a reinforcing bar network, which is used instead of a reinforcing bar network when constructing a retaining wall in which a reinforcing bar network enters between the retaining walls into which the core beam enters among all retaining walls.

To this end, as shown in FIG. 4, the retaining wall pile is inserted into the inside of the casing 10 during construction of the retaining wall and constructed as a wall 12 together with the concrete 11 (13-1). includes

The core beam 13-1 is made of a core beam 13-1 made of a metal material having a hollow tube shape.

For example, the core beam 13 - 1 may be formed of a rectangular tube having a rectangular cross-section having four core beam walls 14 .

Here, it goes without saying that the core beam 13-1 may be formed not only in the shape of a square tube, but also in a shape of a circle, a polygon, or the like.

Such a core beam 13-1 may be manufactured integrally using a mold, may be manufactured by injection or extrusion, may be manufactured in the form of several long iron plates connected by welding, or may be manufactured in the form of one long iron plate and one It can be manufactured in the form of welded and glued bent steel plates.

As the inside of the core beam 13-1 becomes empty in this way, the tramway tube of the pump car can enter through the inside of the core beam 13 to the lower end of the core beam, that is, the lower end of the casing 10 without any interference. , eventually, when pouring the concrete 11 using the tramway pipe, if the concrete 11 is injected from the lower end of the casing 10, the concrete 11 at this time is driven upward from the bottom of the casing 10. It can be filled as you go up.

In particular, a plurality of through holes 15 are formed in the core beam wall 14 of the core beam 13-1 to allow the concrete 11 filled inside the core beam to escape to the outside of the core beam.

At this time, the through hole 15 may be formed in a circular hole shape or the like.

Accordingly, the concrete 11 filled inside the core beam 13-1 passes through the through hole 15 to the outside of the core beam 13-1, that is, the outer surface of the core beam 13-1 and the casing. It is possible to escape into the space between the inner surfaces of the 10 , and eventually the inside of the casing 10 can be filled with the concrete 11 from the bottom of the casing to the top.

In addition, the through-holes 15 formed in the core beam wall 14 of the core beam 13-1 can be formed in all four core beam walls 14 .

As a preferred embodiment, the through-holes 15 can be arranged at regular intervals along the longitudinal direction of the core beam 13-1.

At this time, the through-holes 15 formed in both core beam walls 14 and the through-holes 15 formed in the rear core beam wall 14 can be alternately arranged up and down.

For example, the through-holes 15 formed in the core-beam walls 14 on both sides can be disposed at positions facing each other, and the through-holes 15 formed in the front and rear core-beam walls 14 are formed. can be arranged at positions facing each other, and at the same time arranged at positions between the upper and lower through-holes 15 in the core beam wall 14 on both sides.

By displacing the through-holes 15 formed in the core beam wall 14 on both sides and the through-hole 15 formed in the rear core beam wall 14 in a zigzag form, the core beam 13 due to hole formation -1) can be effectively prevented from weakening.

As a preferred embodiment, the four core beam walls 14 of the core beam 13-1 may have the same thickness.

5 to 7 are perspective views showing the construction state of the retaining wall pile according to various embodiments of the present invention.

As shown in FIGS. 5 to 7 , here, a method of constructing the retaining wall 100 by the CIP method using the core beam 13 , that is, the core beam 13 having the through hole 15 , is shown.

First, as a first step, the step of inserting the casing 10 after drilling the ground is carried out.

Next, as a second step, a core beam having a plurality of through holes 15 formed in the core beam wall 14 as well as in the form of a hollow tube inside the casing 10 contained in the perforated hole ( 13) is inserted.

The core beam 13 used in this second step may be made of a tube having a rectangular cross-section having four core beam walls 14 .

In addition, the through-holes 15 formed in the core beam wall 14 of the core beam 13 have three remaining core beam walls 14 excluding the front one core beam wall 14 in contact with the reinforcing beam side among the four core beam walls 14 . It may be formed on the core beam wall 14 .

In addition, the through holes 15 formed in the core beam wall 14 of the core beam 13 used in the second step are arranged at regular intervals along the longitudinal direction of the core beam 13 . and the through-holes 15 formed in both core beam walls 14 and the through-holes 15 formed in the rear core beam wall 14 may be alternately arranged up and down.

In addition, the front core beam wall 14 among the four core beam walls 14 of the core beam 13 used in the second step has a relatively thicker thickness than the other three core beam walls 14 . It may have, and the core beam 13 used in this second step has a predetermined width along the edge of the front core beam wall 14 and extends sideways, or along the edges of the front and rear core beam walls 14 . A flange portion 16 extending laterally with a predetermined width may be formed.

Next, as a third step, it includes the step of pouring the concrete 11 into the casing 10 in which the core beam 13 is inserted.

That is, in a state in which the tramway tube of the pump car is lowered to the lower end of the casing 14 through the inside of the core beam 13, the concrete is poured while raising the tramway tube upward step by step.

If the concrete is poured while allowing the concrete to fill up from the bottom to the top, the concrete 11 filled in the core beam 13 passes through the through hole 15 to the outside of the core beam 13 ), that is, the inner space of the casing 10 is also filled together, and eventually the concrete 11 is filled from the bottom of the casing 10 to the top.

At this time, the groundwater inside the casing seeped during the drilling is pushed upward by the concrete 11 and does not mix with the concrete 11, and when the concrete 11 is filled up to the upper end of the casing 10, groundwater at this time is discharged to the outside of the casing.

Therefore, the material separation of the concrete due to groundwater does not occur during concrete pouring, and it is possible to construct a strong and stable retaining wall in the end.

And, like the general CIP method, after removing the casing before curing the concrete, removing some concrete layers along with curing the concrete, and then installing a reinforcement beam in front of the core beam, the retaining wall construction can be completed.

As described above, in the present invention, after inserting the hollow core beam into the casing, the concrete is filled up together on the inside and outside of the core beam from the bottom of the casing in a state that the tramway tube of the pump car is lowered to the bottom of the casing into the core beam. By providing a retaining wall construction method, it is possible to construct a solid and stable retaining wall, such as allowing concrete to be filled without separation of materials due to groundwater during concrete pouring.

10: casing
11: Concrete
12 : wall
13: core beam
14: core beam wall
15: through hole
16: flange part

Claims (12)

As being inserted into the inside of the casing (10) when constructing the retaining wall and constructed as a wall (12) together with the concrete (11),
It is made of a core beam 13 in the form of an empty tube, and the core beam wall 14 of the core beam 13 has concrete 11 filled inside the core beam to escape to the outside of the core beam. A plurality of through-holes 15 are formed to allow the concrete 11 to be filled in the core beam 13 to escape to the outside of the core beam 13 through the through-hole 15 , thereby forming the casing 10 . Let the concrete 11 fill up from the bottom of the
The core beam 13 is made of a tube in the form of a square cross-section having four core beam walls 14,
The through-holes 15 formed in the core beam wall 14 of the core beam 13 have three cores except for the front one core beam wall 14 in contact with the reinforcing beam side among the four core beam walls 14 . formed on the beam wall 14,
The front core beam wall 14 among the four core beam walls 14 of the core beam 13 has a relatively thicker thickness than the other three core beam walls 14, so that the core beam 13 It is possible to secure a strong bonding relationship between Retaining wall pile, characterized in that it has advantages in terms of cost and constructability as it can reduce the thickness of the core beam while maintaining it in accordance with the requirements.
delete delete The method according to claim 1,
The through-holes 15 are arranged at regular intervals along the longitudinal direction of the core beam 13, and the through-holes 15 formed in both core beam walls 14 and the through-holes 15 formed in the rear core beam wall 14 are The hole 15 is a retaining wall pile, characterized in that it is arranged alternately above and below each other.
delete The method according to claim 1,
Flange portions ( 16) is a retaining wall pile, characterized in that it is formed.
As a method of constructing a retaining wall by the CIP method,
A first step of inserting the casing 10 after drilling the ground;
a second step of inserting a core beam 13 having a plurality of through-holes 15 formed in the core beam wall 14 while having a hollow tube shape inside the casing 10;
a third step of pouring concrete 11 into the casing 10 into which the core beam 13 is inserted;
In the third step, concrete is poured while raising the tramway pipe step by step while lowering the tramway pipe of the pump car through the inside of the core beam 13 to the lower end of the casing 14, and the concrete is removed from the bottom. The concrete is poured while filling upward, but the concrete 11 filled in the core beam 13 is passed through the through hole 15 to the outside of the core beam 13 to the outside of the casing (10). Pouring while filling the concrete 11 from the bottom to the top,
The core beam 13 is made of a tube in the form of a square cross-section having four core beam walls 14,
The through-holes 15 formed in the core beam wall 14 of the core beam 13 have three cores except for the front one core beam wall 14 in contact with the reinforcing beam side among the four core beam walls 14 . formed on the beam wall 14,
The front core beam wall 14 among the four core beam walls 14 of the core beam 13 has a relatively thicker thickness than the other three core beam walls 14, so that the core beam 13 It is possible to secure a strong bonding relationship between A retaining wall construction method, characterized in that it has advantages in terms of cost and constructability as it can reduce the thickness of the core beam while maintaining it in accordance with the requirements.
delete delete 8. The method of claim 7,
The through-holes 15 formed in the core beam wall 14 of the core beam 13 used in the second step are arranged at regular intervals along the longitudinal direction of the core beam 13, A retaining wall construction method, characterized in that the through-holes (15) formed in both core beam walls (14) and the through-holes (15) formed in the rear core beam wall (14) are alternately arranged above and below each other.
delete 8. The method of claim 7,
The core beam 13 used in the second step has a predetermined width extending sideways along the edge of the front core beam wall 14, or both sides of a predetermined width along the edges of the front and rear core beam walls 14 Retaining wall construction method, characterized in that the flange portion 16 extending to the formed.

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