KR20130021952A - Underground structure having slab beam with enhanced bearing power against earth pressure and construction methods of the same - Google Patents

Abstract

PURPOSE: An underground structure including a floor beam in which supporting force of the earth pressure is reinforced and a construction method thereof are provided to easily construct an underground structure and to reduce the time for construction. CONSTITUTION: An underground structure including a floor beam in which supporting force of the earth pressure is reinforced comprises a stiffener, a connection member(110), a horizontal stiffener, and a floor beam. The stiffener is embedded in an earth retaining wall(1) in regular intervals. The connection member is installed at the stiffener. The horizontal stiffener is installed in order to connect the connect members to each other and is embedded with the connection member in the concrete of a wall. The floor beam is installed at the horizontal stiffener or the connection member and supports a concrete slab.

Description

Underground structure having slab beam with enhanced bearing power against earth pressure and construction methods of the same

The present invention relates to an underground structure and its construction method, and more particularly, because the earth pressure bearing capacity of the floor beams is large, it is possible to excavate two or more basement layers at once and to form a concrete slab after installing the floor beams to the basement floor of the building first. The construction can be convenient and shorten the construction period, and the earth pressure supporting structure can be strengthened even if the wall thickness of the underground structure is reduced, thus reducing the concrete required for the construction of the underground structure and the space utilization of the underground structure. To improve, it relates to an underground structure and its construction method.

In general, when the building construction is to build a basement, such a basement to build a basement wall to prevent the collapse of the ground and to build a basement floor in a top-down (Top-Down) method.

The top-down method is a method of forming the basement walls and basement pillars in advance before the excavation, and then forming the underground structure from the top to the bottom while repeating the basement slab and earthwork step by step, and also for excavation for large structures in downtown It is stable and the construction method can expect the effect of early securing of the work place by the first floor construction of the structure and the reduction of air due to the simultaneous construction of the ground and the underground.

On the other hand, as an example of the construction of the clam wall, the earth plate while driving the excavation and excavating the excavation excavation at a predetermined interval between the CIP method (Cast In Place Pile) and the beam-shaped pile (PILE) for placing the clam wall in concrete at the construction site Pile soil plate wall between the piles, Soil Cement Wall (SCW), diaphragm wall (Diaphragm wall). Among them, the CIP method is mainly used as a method for constructing the basement layer because of the superior rigidity of the retaining wall as compared to the pile earth retaining wall and the soil cement wheel.

The CIP method is to cast reinforced concrete columns in the field by casting heat, install a casing by drilling the ground vertically with a drilling equipment, install reinforcing bars in the casing, and insert H-beams into the casing at predetermined intervals. It is a method of forming the retaining wall by repeating a series of processes of filling concrete to solidify the column and then removing the casing.

When the retaining wall is installed along the boundary of the building, after the first dig, after installing the strip and the rim beam to support the retaining wall, the method of connecting the cheolgolbo to the column and the rim beam and placing the slab on it is repeated. Build the structure. At this time, the height of each floor of the building is approximately 3.6m to 4.5m, and the wall is constructed on the retaining wall to support the load of the slab and the load of the building.

On the other hand, the ground is excavated by one layer height, and after installing the cheolgolbo is installed slab, this is to allow the slab to support the earth pressure because the cheolgolbo is weak earth pressure bearing capacity. That is, since the cheolgolbo has a weak earth pressure bearing force, it is necessary to repeatedly excavate, install the cheolgolbo, and slab as much as one floor height, thereby making construction difficult and requiring a lot of construction period.

Figure 1 shows a cross section of the construction of the underground structure. After constructing the retaining wall w using the above-described CIP method, the wall 5 is constructed inside the outer wall of the underground structure, that is, inside the retaining wall by the top-down method. Here, the cheolgolbo and the slab placed on the cheolgolbo installed between each layer is not shown.

The wall 5 should be made to support the load of the slab and the load of the building and to prevent the ground from collapse by earth pressure. Therefore, the wall 5 is resistant to earth pressure and has a problem that the thickness must be thick to support the load of the slab and the load of the building.

In addition, as the wall 5 becomes thicker, a lot of materials such as concrete and reinforcing bars forming the wall 5 are required, as well as the space utilization inside the underground structure is also reduced.

The present invention was devised to solve the above problems, the basement structure and its construction can be convenient and shorten the construction period because it can excavate more than two floors at a time due to the large earth pressure bearing capacity of the floor beam The purpose is to provide a method.

Still another object of the present invention is to provide an underground structure and a construction method thereof, which is convenient for construction and can shorten the construction period, since it is possible to form a slab after first installing a floor beam to the basement floor of a building.

Still another object of the present invention is to provide an underground structure and a construction method thereof capable of withstanding the load of the slab as well as strengthening the supporting structure against earth pressure even if the thickness of the wall of the underground structure is reduced.

It is still another object of the present invention to provide an underground structure and a method for constructing the same, which can reduce the thickness of the wall of the underground structure, thereby reducing the cost of the material forming the wall.

In order to achieve the above object, the underground structure according to the present invention, the reinforcement buried at a predetermined interval on the earth wall; A connection member coupled to the reinforcement; Horizontal reinforcement provided to connect the connecting members to each other; And a floor beam installed on at least one of the horizontal reinforcement and the connection member. The bottom beam includes a steel pipe 170, the steel pipe 170 has a rectangular or circular cross-sectional shape and a hollow is formed along the longitudinal direction therein, the hollow is filled with concrete (C3). The connecting member and the horizontal reinforcement are embedded in the wall 160 of the underground structure, thereby increasing the rigidity of the wall 160. On the other hand, there is no concrete (C3) in the hollow of the steel pipe 170 may be to provide a earth pressure bearing force only by the steel pipe 170.

An injection hole 171 for injecting concrete C3 may be formed in the steel pipe 170.

The reinforcing material may comprise a steel pipe (4), the steel pipe (4) has a square or circular cross-sectional shape and a hollow is formed along the longitudinal direction therein, the hollow is filled with concrete (C1).

The horizontal reinforcing material may include a steel pipe 120, the steel pipe 120 has a rectangular or circular cross-sectional shape and a hollow is formed along the longitudinal direction therein, the hollow is filled with concrete (C2).

The steel pipe 120 may be formed with an injection hole 123 for injecting concrete.

A spacer 128 may be installed between the horizontal reinforcement and the retaining wall. It is preferable that horizontal reinforcement 130 is installed in the space secured between the horizontal reinforcement and the wall of the earth by the spacer member. The horizontal reinforcement 130 is embedded in the wall 160, thereby increasing the earth pressure bearing force of the wall 160.

According to another aspect of the present invention, a method of constructing an underground structure includes: (a) constructing a barrier wall 1 along a boundary line of a structure to be constructed; (b) excavating the ground to the inside of the retaining wall (1) to a predetermined depth to perform the digging operation, and installing the connecting member (110) in the reinforcing material embedded in the retaining wall (1) at predetermined intervals; (c) installing horizontal reinforcement to connect the connecting members to each other; (d) installing a floor beam on at least one of the horizontal reinforcement and the connecting member 110; (e) forming a slab 150 on top of the floor beam; And (f) constructing the wall body 160 to the inside of the retaining wall. The connecting member 110 and the horizontal reinforcement are embedded in the wall 160. In addition, the bottom beam includes a steel pipe 170, the steel pipe 170 has a rectangular or circular cross-sectional shape and a hollow is formed along the longitudinal direction therein, the hollow is filled with concrete (C3). On the other hand, there is no concrete (C3) in the hollow of the steel pipe 170 may be to provide a earth pressure bearing force only by the steel pipe 170.

The reinforcing material comprises a steel pipe (4), the steel pipe (4) has a square or circular cross-sectional shape therein is formed hollow in the longitudinal direction therein, the hollow is filled with concrete (C1).

The horizontal reinforcing material includes a steel pipe 120, the steel pipe 120 has a rectangular or circular cross-sectional shape and a hollow is formed along the longitudinal direction therein, the hollow is filled with concrete (C2).

Through-holes 113 are formed in the connection member so that the horizontal reinforcement 130 is inserted and connected, and the horizontal reinforcement 130 is embedded in the wall 160.

The construction method includes installing a floor beam in step (d), and then excavating the inner ground of the retaining wall; the excavation may excavate two basement layers or more depths at a time. The gulch may be made before forming the slab 150 in the bottom beam installed in step (d).

The step (e) may be performed after installing the floor beams to the basement floor first.

Underground structure and construction method according to the invention has the following effects.

First, because the earth pressure bearing capacity of the floor beam is large, it is possible to excavate more than two floors at once, which makes the construction easier and shorten the construction period.

Second, since the floor beams can be installed first to the bottom of the basement and then slab can be formed, the construction is convenient and the construction period can be shortened.

Third, even if the thickness of the wall of the underground structure is reduced, the support structure for earth pressure can be strengthened, and the slab can withstand the load.

Fourth, it is possible to reduce the thickness of the wall of the underground structure to reduce the cost of the material forming the wall, it is possible to improve the space utilization of the underground structure.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in detail with reference to the following drawings, which illustrate preferred embodiments of the present invention, and thus the technical idea of the present invention should not be construed as being limited thereto.
1 is a cross-sectional view schematically showing an underground structure in which a wall is constructed on a conventional retaining wall.
2 is a perspective view showing an underground structure according to a preferred embodiment of the present invention.
3 is a plan view showing the underground structure of FIG.
4 is a perspective view showing a reinforcing member and a connection member provided in the underground structure of FIG.
5A is an enlarged view of a portion A of FIG. 3;
FIG. 5B is a cross sectional view along line BB of FIG. 5A;
6 is a cross-sectional view taken along the line CC ′ of FIG. 3.
7a to 7h are diagrams illustrating each step of constructing an underground structure according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

On the other hand, the present invention is characterized in that the floor beam for supporting the concrete slab made of a square or circular steel pipe and the concrete is filled in the interior of the steel pipe. Such a bottom beam may be installed on at least one of the horizontal reinforcement and the connecting member. Hereinafter, only the bottom beam is installed on the connecting member for convenience of description. Since the floor beam is installed in the horizontal reinforcement or the floor beam is installed in both the connecting member and the horizontal reinforcing material will be easily understood by those skilled in the art with reference to the following description, the description thereof will be omitted.

2 is a perspective view showing an underground structure according to a preferred embodiment of the present invention, Figure 3 is a plan view showing the underground structure.

Referring to the drawings, the underground structure is a reinforcement embedded in the retaining wall (1) at a predetermined interval, the horizontal reinforcement and the horizontal reinforcement and the connecting member 110 installed to connect the connecting member 110 and the connecting member 110 installed in the reinforcing material The floor beam provided in at least one of the 110 is provided.

The barrier wall (1) is to be installed along the boundary line on which the building is erected to prevent the ground from collapsing, in the present specification will be described as such a barrier wall (1) formed by the CIP method. However, it should be understood that the retaining wall 1 may also be formed by conventional pile earth plate, small cement wall (SCW), diaphragm wall, or the like. Since the CIP method has been described above, a detailed description thereof will be omitted.

The reinforcing material is embedded in the retaining wall 1 at predetermined intervals. Hereinafter, a column in which the reinforcing material is embedded among the pillars constituting the retaining wall 1 is called a steel column 2.

The reinforcing material reinforces the earth pressure bearing force of the retaining wall 1, and in the present invention, it is preferable that a rectangular or circular steel pipe 4 filled with concrete C1 is used as the reinforcing material. A hollow is formed in the longitudinal direction of the steel pipe 4, and the hollow is filled with concrete (C1). Steel pipe 4 filled with concrete (C1) therein has the advantage that the bearing capacity for earth pressure is greater than H-shaped steel.

The 'square steel pipe' means a steel pipe having a cross section of a triangle, a square, a pentagon, a hexagon, and the like, and the 'round steel pipe' refers to a steel pipe having a cross-sectional shape close to a circle as well as a steel pipe having a circular cross section of a mathematical meaning. .

The concrete (C1) may be installed at the same time when installing the casing after the drilling of the ground and installing the steel pipe inside the casing at the same time, when the concrete is placed inside the casing, may be pre-poured inside the steel pipe (4) in the factory have.

The connecting member 110 is installed at a predetermined interval on the retaining wall 1, it is preferable that the T-shaped steel having a predetermined length as shown in FIG. Specifically, the connection member 110 is coupled to the steel pipe (4). At this time, when the connecting member 110 is installed, the concrete of the steel pillars 2 surrounding the steel pipe 4 is partially trapped to partially expose the steel pipe 4, and then the connecting member ( 110). The connecting member 110 is fixed to the steel pipe (4) by welding or bolts and nuts. On the other hand, the connection member 110 may be used in addition to the H-shaped steel H-shaped steel.

The connection member 110 may be manufactured and installed to have the same length as the length of the entire basement section of the underground structure, but may be selectively installed only in the required section. The necessary section may be understood to mean a minimum section that can increase the stiffness of the installation section and the wall (see '160' in FIG. 7H) of the floor beam 140 installed for placing the slab.

The connecting member 110 is embedded in the wall concrete when placing the wall 160 serves to increase the rigidity of the wall 160.

On the other hand, the connection member 110 is formed with a plurality of through-holes 113 along the longitudinal direction of the connection member 110. The through hole 113 is formed to be located below the horizontal reinforcement member 120 to be described later.

The horizontal reinforcing bars 130 are inserted into the through holes 113. As shown in Figure 5a and 5b, the horizontal reinforcement 130 is coupled to the neighboring horizontal reinforcement 130. As the horizontal reinforcement 130 is inserted and installed, the rigidity of the wall 160 is increased, as well as the resistance to transverse earth pressure is improved. In addition, the wall concrete is poured between the through-holes 113 formed in the connecting member 110, the coupling force between the connecting member 110 and the wall concrete is increased. On the other hand, the horizontal reinforcement 130 may be installed horizontally in a mathematical sense, but may be installed to be inclined relatively close to the horizontal rather than vertical.

According to the invention, the horizontal reinforcement is installed to connect the connecting members 110 to each other. The horizontal reinforcement serves to support the retaining wall 1.

This horizontal reinforcement may be made of a steel pipe 120 of the square or circular. Inside the steel pipe 120, a hollow is formed along its longitudinal direction, and the hollow is filled with concrete C2. The casting of the concrete (C2) is made through the injection hole 123 formed in the steel pipe (120). Steel pipe 120 filled with concrete (C2) has an advantage that the bearing capacity for earth pressure is greater than H-shaped steel.

Steel pipe 120 is connected to the connecting member 110 by welding or the like. That is, as shown, the steel pipe 120 may be welded to the flange 111 and the web 112 of the connection member 110 to be coupled to each other. In addition, although not shown in the drawings, the steel pipe 120 may be coupled to the flange 111 and / or web 112 using bolts and nuts.

As described above, the 'square steel pipe' means a steel pipe having a cross section of a triangle, a square, a pentagon, a hexagon, and the like, and the 'circular steel pipe' refers to a cross section of a shape close to a circular shape as well as a steel pipe having a circular cross section of a mathematical meaning. It also means steel pipe with. In addition, the 'horizontal' of the 'horizontal reinforcement' is used not only to mean the horizontal in the mathematical sense but also to include a relatively close to the horizontal than the vertical. Therefore, in the present invention, the horizontal reinforcing material is not necessarily installed to be horizontal in the mathematical sense.

The horizontal reinforcement as described above is embedded in the wall concrete together with the connection member 110 when the wall 160 is constructed to be a permanent structure.

The steel pipe 120 is formed with injection holes 123 at predetermined intervals along the longitudinal direction. Concrete C2 is injected through the injection hole 123. In addition, the injection hole 123 increases the bonding force between the concrete (C2) and the wall concrete in the steel pipe 120.

In addition, a spacer 128 may be installed between the horizontal reinforcement and the retaining wall 1. The spacer member 128 may be formed in a block shape, for example, in a rectangular parallelepiped shape, thereby forming a space between the horizontal reinforcement member 120 and the retaining wall 1 to form a space through which the horizontal rebar 130 may pass. . The horizontal rebar 130 has been described above.

Thus, as compared to the wall (5 of FIG. 1) formed from the outer surface of the existing retaining wall (w in Figure 1), in the present invention, as a portion of the connecting member 110 is embedded in the retaining wall (1) The thickness of the wall can be efficiently reduced, and as the connecting member 110 and the horizontal reinforcement are embedded in the wall 160, the rigidity of the wall 160 can be increased to reduce the thickness of the wall 160.

In addition, by using the steel pipes 4 and 120 as horizontal reinforcement and reinforcement, the stiffness of the retaining wall 1 and the wall 160 can be increased compared to the existing retaining wall w and the wall 5. .

On the other hand, the bottom beam is installed on the connecting member 110 to support the concrete slab (not shown in the figure). The girder is installed to connect the connecting members 110 to each other or to connect the connecting members 110 and the pillars 7 of the underground structure to each other. On the other hand, although the drawing shows that the floor beam is installed in the connecting member 110, the floor beam may be installed in the horizontal reinforcement, or may be installed in both the horizontal reinforcement and the connecting member 110. That is, the bottom beam may be installed on at least one of the connecting member 110 and the horizontal reinforcement. However, below, only the bottom beam is installed in the connecting member 110 for the convenience of description.

As shown in Figures 5a to 6, the bottom beam may be made of a steel pipe 170 having a square or circular cross-sectional shape. Inside the steel pipe 170, a hollow is formed along its longitudinal direction, and the hollow is filled with concrete C3. The casting of the concrete C3 may be made through the injection hole 171. On the other hand, the floor beam according to the present invention may be made of only the steel pipe 170 without placing concrete (C3) in the hollow.

The steel pipe 170 may be welded to the flange 111 of the connection member 110 to be installed. As an alternative to the welding, steel pipe 170 may be coupled to flange 111 by bolts and nuts. For example, by welding a flat plate (not shown) having a predetermined width and height to the end of the steel pipe 170, and bolts (not shown) and nuts penetrating the flat plate and the flange 111 The flat plate and the flange 111 may be coupled to each other by using. Such combinations will be easily understood by those skilled in the art with reference to the present specification, and thus detailed descriptions thereof will be omitted.

The steel pipe 170 filled with concrete C3 has a larger bearing capacity against earth pressure than H-shaped steel or the like. Therefore, according to the present invention, by supporting the earth pressure using a floor beam, it is possible to excavate more than two layers of ground at once. In other words, conventionally, after installing the floor beam, the concrete slab to support the earth pressure by forming a concrete slab on the floor beam, but in the present invention, because the floor beam can support the earth pressure, the concrete slab immediately after installing the floor beam It is not necessary to form and it is possible to excavate more than one layer of ground at once after installing the beams. In addition, since the concrete beams may be formed on the floor beams of each floor after installing the floor beams to the basement floor first, the construction is convenient and speedy. This point is discussed further below.

As described above, the present invention can increase the rigidity of the retaining wall 1 and the wall 160 to make the thickness thinner than the conventional retaining wall w and the wall 5, and accordingly, materials such as concrete and reinforcing bars Since the use can be reduced and economical and the thickness of the wall 160 can be reduced, space utilization of the underground structure can be increased.

Then, the construction method of the underground structure as described above will be described with reference to Figure 7a to 7h.

First, as shown in FIG. 7A, the retaining wall 1 is constructed along the outer boundary where the underground structure is to be built. As the barrier wall 1 is known, it refers to a structure which is installed on the outer boundary side of the underground structure to prevent the surrounding soil from collapsing during the excavation of the underground. Such a barrier wall 1 is, for example, a CIP method. It can be formed by. In addition, a barrier wall may be formed by a conventional earth plate barrier wall, a soil cement wall, a diaphragm wall, or the like.

Reinforcing material, that is, steel pipe (4) is embedded in the retaining wall (1) at predetermined intervals. Since the reinforcing material is a steel pipe 4 filled with concrete (C1) therein, the earth pressure bearing force is larger than that of the conventional H-shaped steel.

On the other hand, the retaining wall (1) shown in Figure 7a to 7h is shown to show the steel pipe (4) for convenience of description.

In addition, when constructing the retaining wall 1, a pillar supporting the building (not shown in FIGS. 3 and 7A to 7H) may be selectively installed.

Next, as shown in FIG. 7B, after performing the first trench on the inner soil of the retaining wall 1, the connecting member 110 is installed on the retaining wall 1. At this time, the depth of the primary trench is excavated to a suitable depth to install the ground floor floor beam and the connecting member 110.

Specifically, the connection member 110 is installed in the steel pipe (4) embedded in the retaining wall (1). Here, the connecting member 110 may be used T-shaped steel, H-shaped steel may also be used. The connecting member 110 is fixed to the steel pipe 4 by welding or bolts.

On the other hand, each pillar constituting the retaining wall (1) is made of a circular cross-section, and removes a part of the concrete covering the steel pipe 4 so that one surface of the steel pipe 4 is installed after the connection member 110 is installed. .

The connection member 110 supports the horizontal reinforcement 120 is installed between the connection member 110 in the subsequent process and the bottom beam installed in the connection member 110.

Subsequently, as shown in FIG. 7C, the spacer 128 and the horizontal reinforcement are installed between the connection members 110. As described above, since the horizontal reinforcing material is a steel pipe 120 filled with concrete (C2) therein, the bearing capacity for earth pressure is greater than that of the conventional H-shaped steel. Steel pipe 120 may be coupled to the web 111 and / or flange 112 of the connecting member 110 by welding or the like.

Next, the horizontal reinforcing bar 130 is inserted into the through hole 113 and installed. The spacer member 128 forms a space between the steel pipe 120 and the retaining wall 1. Horizontal reinforcement 130 is installed in such a space, it is installed to pass through the through hole 113 is connected to the neighboring horizontal reinforcement 130.

The horizontal reinforcement serves to support the retaining wall 1. In addition, the horizontal reinforcing material is embedded in the wall 160 serves to increase the rigidity of the wall 160.

Subsequently, as shown in FIG. 7D, the bottom bore steel pipe 170 is installed in the connection member 110. 7D illustrates that both ends of the steel pipe 170 are installed at the connecting member 110, but the steel pipe 170 may be installed to connect the connecting member 110 and the pillar 7.

The girder acts as a strut supporting the earth pressure applied from the retaining wall 1, and after completion of the underground construction, it is maintained as a permanent structure supporting the concrete slab.

After the installation of the floor beams on the ground floor is completed, additional soil is excavated. By the way, in the present invention, the floor beam made of steel pipe 170 can excavate more than two layers of ground at a time because the support force for earth pressure is very large. That is, in the past, after installing the floor beam and placing the slab to secure the bearing capacity for earth pressure, the ground corresponding to the depth of one layer was excavated, but in the present invention, after the floor beam is installed because the earth pressure bearing capacity of the floor beam is large. There is no need to cast concrete slabs and it is possible to excavate more than two layers at once. Figure 7e shows an example of excavating the ground corresponding to the depth of the two layers at once without installing a slab on the floor beam after installing the floor beam of the ground floor. Therefore, the present invention has the effect that the construction can be convenient and the construction period can be shortened.

Subsequently, as shown in FIG. 7F, the connecting member 110 is installed in the reinforcing material at the height corresponding to the first and second basement floors, and the horizontal reinforcing material and the floor beam and the horizontal reinforcement 130 are installed in the connecting member 110. do. Installing the horizontal reinforcement and the floor beam and horizontal reinforcement 130 to the connecting member 110 can be made in the same manner as described above.

The floor beam is installed to the lowest basement floor through the above process, and then the foundation floor concrete (190 in FIG. 7g) is poured. On the other hand, reinforcing bars 180 formed of a reinforcing bar network may be installed before the wall 160 is constructed.

Next, as shown in FIG. 7H, the concrete is poured to form the slab 150 and the wall 160. In the present invention, the floor slab 150 may be formed immediately after installing the floor beams of each layer, but after installing the floor beams to the basement floor, the floor slabs 150 may be formed on each floor. If the slab 150 is formed at the same time after installation, the construction is convenient and the construction period can be shortened.

On the other hand, the slab 150 is not placed over the entire area of the layer, but is poured with leaving the outer edge portion so that the outer boundary of the slab 150 is formed with a predetermined distance away from the retaining wall 1. do. For example, the outer boundary of the slab 150 is to be poured so that it can be located in line with the inner boundary of the underground wall 160 to be constructed later. The reason for this configuration is to enable continuous construction of the wall 160 during the construction of the underground wall 160 afterwards. That is, since a predetermined space is formed between the slab 150 and the connecting member 110 and between the slab 150 and the horizontal reinforcement, as in the conventional method, the underground outer wall is not cut off by the rim beam, etc. Construction can be performed continuously by

After the construction of the slab 150 is completed, the wall 160 is constructed upward from the bottom to the ground (pneumatic construction). At this time, since the outer boundary portion of the slab 150 is pre-installed only to the wall predetermined surface, as described above, the wall 160 can be continuously constructed at one time without being cut off by each layer slab 150.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

C1, C2, C3: Concrete 1: retaining wall
110: connecting member 113: through hole
4, 120, 170: steel pipe 130: horizontal rebar
150: slab 160: wall
180: rebar

Claims (12)

Reinforcing material embedded in the earth wall at a predetermined interval;
A connection member coupled to the reinforcement;
Horizontal reinforcement provided to connect the connecting members to each other; And
It includes; the floor beam installed on at least one of the horizontal reinforcement and the connecting member,
Footpath,
It has a rectangular or circular cross-sectional shape and includes a steel pipe 170 formed therein along the longitudinal direction therein,
Underground structure, characterized in that the connection member and the horizontal reinforcement is embedded in the wall (160) of the underground structure. The method of claim 1,
Underground structure, characterized in that the hollow of the steel pipe (170) is filled with concrete (C3). The method of claim 2,
Steel pipe 170 is an underground structure, characterized in that the injection hole 171 for injecting concrete (C3) is formed. The method of claim 2,
Horizontal reinforcement,
Underground structure characterized in that it has a rectangular or circular cross-sectional shape therein is formed in the hollow along the longitudinal direction, the hollow includes a steel pipe (120) filled with concrete (C2). 5. The method of claim 4,
Steel pipe 120 is an underground structure, characterized in that the injection hole 123 for injecting concrete is formed. (a) constructing a retaining wall 1 along a boundary line of the structure to be constructed;
(b) excavating the ground to the inside of the retaining wall (1) to a predetermined depth to perform the digging operation, and installing the connecting member (110) in the reinforcing material embedded in the retaining wall (1) at predetermined intervals;
(c) installing horizontal reinforcement to connect the connecting members to each other;
(d) installing a floor beam on at least one of the horizontal reinforcement and the connecting member 110;
(e) forming a slab 150 on top of the floor beam; And
(f) constructing the wall body 160 to the inside of the retaining wall; and
The connecting member 110 and the horizontal reinforcement is embedded in the wall 160,
Footpath,
Method of constructing an underground structure, characterized in that it comprises a steel pipe (170) having a rectangular or circular cross-sectional shape formed therein along the longitudinal direction therein. The method according to claim 6,
Construction method of an underground structure, characterized in that the hollow of the steel pipe (170) is filled with concrete (C3). The method of claim 7, wherein
Horizontal reinforcement,
Method of constructing an underground structure, characterized in that it has a rectangular or circular cross-sectional shape and a hollow is formed in the longitudinal direction therein, the hollow includes a steel pipe (120) filled with concrete (C2). The method of claim 7, wherein
Through-holes 113 are formed in the connecting member so that the horizontal reinforcement 130 is inserted and connected thereto.
Horizontal reinforcement 130 is a method of construction of underground structures, characterized in that embedded in the wall (160). 10. The method according to any one of claims 7 to 9,
(d1) after installing the floor beam in the step (d), the step of excavating the inner ground of the retaining wall; includes,
The construction method of the underground structure, characterized in that the excavation of two underground layers or more depth at one time. The method of claim 10,
The method of constructing an underground structure, characterized in that the gulto of step (d1) is made before forming the slab (150) on the floor beam installed in step (d). The method of claim 11,
The step (e) is the construction method of the underground structure, characterized in that after the first to install the bottom beam to the basement floor.

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