KR100662524B1 - Double pipe girder struts as permanent system - Google Patents

Abstract

The present invention is composed of a pair of straight members integrally connected to each other by a plate and integrally connected to each other by a plate, and a "#" shaped connecting member coupled to a point where the straight members cross each other; A first step of installing the retaining wall and the center pile around the ground where the underground structure is constructed, a second step of excavating the ground and discharging the soil by a predetermined depth, and a third step of placing the rim beam inside the retaining wall; A fourth step of installing on the rim beam so that the horizontal skeleton structure is mounted on the center pile, a fifth step of further excavating the ground by one layer, and taking out the soil; and the third, fourth, and fifth steps The sixth step of sequentially excavating the ground by a desired depth and installing the horizontal skeleton structure in multiple stages, and the seventh step of installing a mat slab on the bottom of the ground excavated through the process, and the multi-stage installed An eighth step of installing a vertical reinforcing member between the connecting members of the horizontal frame structure, a ninth step of removing the center pile, and constructing a column in the vertical reinforcing member, Using a group horizontal skeleton structure with permanent structures are installed through the step 10 to form an underground structure; It is to provide a horizontal skeleton structure that can reduce the cost of construction, shorten the construction period, and improve the quality, a structure using the same, and a construction method thereof.

 Horizontal skeletal structure, straight member, connecting member, coupling member, underground structure, retaining wall

Description

Horizontal skeletal structure and underground soil brace construction method using the same

1 is a perspective view showing a horizontal skeleton structure according to the present invention.

Figure 2a is a perspective view showing a straight member of the horizontal skeleton structure of Figure 1;

Figure 2b is a perspective view showing a connecting member of the horizontal skeleton structure of Figure 1;

Figure 2c is a perspective view showing another embodiment of the connecting member of the horizontal skeleton structure of Figure 1;

3 to 9 is a process diagram of the earth retaining construction using the present invention the horizontal skeleton structure.

* Description of the symbols for the main parts of the drawings *

100a, 100b, 100c: horizontal skeleton structure 110: linear member

112: plate 120: connecting member

122: through hole 124: coupling member

200: underground structure 210: ground

220: retaining wall 230: center pile

240a, 240b, 240c: Rim beam 250: Matt slab

260 vertical reinforcement member 270 pillar

The present invention relates to a horizontal brace used in the form of a horizontal skeleton structure such as a building and the earthquake construction for preventing the collapse of earth excavation of the excavated ground during the excavation work for the construction of the basement to the horizontal skeleton structure, By using a horizontal skeleton structure with excellent buckling performance to resist underground horizontal skeleton structure against earth pressure, it is possible to minimize the hypothetical vertical member and to connect the permanent vertical member (column) after completion of the construction And, using the horizontal skeleton structure as a horizontal brace for earth pressure relates to a horizontal skeleton structure and the construction method combined with a horizontal brace that can simplify the underground trench construction and underground structure construction more quickly and more economically.

In general, there are three typical methods for constructing underground structures. After constructing the temporary wall on the ground where the underground structure is constructed and installing the temporary horizontal braces that resist the earth pressure of the earth walls, the construction of the excavation and horizontal braces are completed to complete the construction of the underground underground walls. A net pouring method of installing the main structure while dismantling the temporary structure from the part to the ground; After the earthquake is formed on the ground where the underground structure is constructed, the permanent vertical member is installed, and then the trench and the horizontal skeleton structure are installed in sequence to excavate to the deepest part of the basement. A Strut as a Permanent System (SPS) method, which is a method of installing a slab, a concrete part of a column, a wall, etc. except for a structure, and a ground part; After installing the slurry wall which is the retaining wall and the permanent structural wall on the ground where the underground structure is constructed, the permanent vertical member is installed, and when the horizontal skeleton structure and the slab of the ground floor are completed, the trench and the main structure are installed sequentially. At the same time, the top-down method is the method of forming the next ground layer into the ground.

The piling method installs the thumb pile around the ground where the structure is constructed, installs the earth plate between the board piles at the same time as the excavation, installs the band and supports the earth pressure by placing the horizontal brace on the horizontal and vertical sides of the horizontal plane. to be. In this horizontal brace construction method, the horizontal brace is usually installed before H-BEAM is used and the temporary vertical member called the center pile can be connected so that the H-BEAM can not be buckled by earth pressure. As the excavation progresses, horizontal braces are installed in 2nd and 3rd stages and connected to the center pile on each floor.

The SPS method is also called permanent strut method, and after installing the earthquake wall, the steel frame member (PRD foundation), which is a permanent vertical member before the excavation work and is connected to the foundation pile designed to withstand the load during the underground construction work, is installed. . Each floor is then equipped with a horizontal skeleton structure using H-BEAM, which serves as a horizontal brace to withstand earth pressure and a permanent horizontal skeleton structure. At this time, the permanent horizontal skeleton structure should be sized so that the soil membrane can withstand the earth pressure, and should be connected to the permanent vertical member already installed, and when excavated to the deepest basement, the slab except the vertical member formed by the skeleton and the horizontal skeleton structure, Install the concrete part and wall of the column to the ground part. At this time, when the underground mat slab is completed, it is possible to build a steel structure to the ground.

In the reverse casting method, the foundation is formed with the slurry wall construction. After the foundation, the foundation is inserted with H-BEAM for the underground vertical member (RCD foundation), and the foundation concrete is poured into the foundation. Form the structure including the skeleton structure, the upper and lower parts of each method is to form each layer by the battered and reversed.

However, the net pouring method, the SPS method, and the reverse pouring method have the following problems.

In the case of the piling method, the retaining wall is to be dismantled during construction of the underground structure of the building as a temporary construction, which causes sudden stress imbalance of the retaining wall. In addition, risks may occur during disassembly, and construction may not be easy due to mutual interference with the structure, resulting in loss of materials, and a certain period of time required for dismantling. . In addition, the deformation of the surrounding ground may occur, causing a lot of defects in the surrounding structures, and the distance between the center piles that prevents buckling of the horizontal braces is too small. The construction period is long due to the interference of temporary materials.

In the case of the SPS method, the pillar (PRD foundation), which is a permanent vertical member, is constructed before the excavation of the underground, so the gap between the pillars is narrow, making it difficult to dig underground, and the H-BEAM is connected to the column as a permanent horizontal skeleton structure. As it has the construction error of the column, the construction period is long because H-BEAM should be measured and manufactured, and there is difficulty in quality control because the site should be welded to the column steel frame. In addition, H-BEAM as a horizontal brace should be able to withstand strong earth pressure. The H-BEAM has a strong axis and a weak axis, so the size of the member is determined by the weak axis direction buckling, so that a wide H-beam must be manufactured separately. As the member becomes uneconomically large and the H-BEAM as a horizontal skeleton structure becomes wider, installation of reinforcing bars and formwork of pillars formed of steel reinforced concrete columns is not easy.

In the case of reverse pouring method, since the work of slurry wall and RCD foundation is possible only with large equipment, it is difficult to use in narrow site or difficult to enter, and construct the permanent vertical member (RCD foundation) before digging underground Because of the narrow spacing of the columns, it is difficult to dig underground works, and because of the reverse casting, it is difficult to connect the concrete of the upper part of the installation and the concrete placed on the lower part. In addition, since the rebar of the horizontal skeleton structure made of reinforced concrete interferes with the H-BEAM of the vertical structure that is already installed, its connection or processing is difficult, quality control is difficult, and there is a construction error of the vertical member that is installed before breaking. It's hard to do.

Therefore, the present invention is to solve the above-mentioned problems, and to install the horizontal skeleton structure first and to form a vertical member after the completion of the horizontal skeleton structure to minimize the interference between the vertical member and the horizontal skeleton structure to facilitate construction The purpose is to facilitate the work of digging by forming a wide distance between the vertical members of the construction site when digging underground.

In addition, the horizontal skeleton structure can serve as a horizontal brace structure for proceeding the digging, thereby minimizing the construction of the temporary structure, to effectively resist the earth pressure by making the shape of the horizontal skeleton structure efficient for buckling, Another object is to allow free choice of permanent vertical members.

In addition, it is possible to reduce the construction cost, shorten the construction period by the above method, and to provide a horizontal skeleton structure, an earthquake structure using the same, and a method of improving the quality thereof.

The horizontal skeleton structure of the present invention for achieving the object as described above is composed of a pair, the "#" shape of the linear member is connected to each other by a plate and integrally coupled to the intersection point of the linear member It consists of a connecting member.

In addition, the retaining support method using the horizontal skeleton structure, the first step of installing the retaining wall and the center pile around the ground on which the underground structure is constructed; A second step of excavating the ground by a predetermined depth and discharging the soil; A third step of placing the rim beam inside the retaining wall; A fourth step of installing on the frame beam such that the horizontal frame structure is mounted on the center pile; A fifth step of excavating the ground further by one layer and removing the soil; A sixth step of sequentially excavating the ground to a desired depth by repeatedly repeating the third, fourth, and fifth steps and installing the horizontal skeleton structure in multiple stages; A seventh step of installing a mat slab on the ground of the ground excavated through the above process; An eighth step of installing a vertical reinforcing member between the connecting members of the horizontal frame structure installed in multiple stages; A ninth step of removing the center file; And a tenth step of constructing a pillar in the vertical reinforcing member and forming an underground structure using the horizontal skeleton structure as a permanent structure.

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

1 is a perspective view showing a horizontal skeleton structure according to the present invention, Figure 2a is a perspective view showing a linear member of the horizontal skeleton structure of Figure 1, Figure 2b is a perspective view showing a connecting member of the horizontal skeleton structure of Figure 1 to be.

As shown in the figure, the horizontal skeleton structure 100 of the present invention supports the retaining wall and prevents the excavation surface or the slope from collapsing due to earth pressure, and a plurality of linear members 110 and the linear members 110. It is composed of a connecting member 120 is coupled to the intersection point.

The linear member 110 includes a pair of pipes P1 and P2 spaced apart by a predetermined distance in a horizontal direction, and a plate 112 connecting the pair of pipes P1 and P2 to be integrally formed. . In addition, flanges F1 are formed at both ends of the pair of pipes P1 and P2 to be coupled to the connection member 120 or another straight member.

The connecting member 120 has four pipes P3 to P6 formed in a planar "#" shape, but are formed to cross each other so as to be perpendicular to each other. Each end of the connecting member 120 is formed with a flange (F2) to be coupled to the linear member 110 or other connecting member, the inside of the connecting member 120 is formed to communicate with each other in a hollow. In addition, a through hole 122 is formed at the center of the connection member 120, and the through hole 122 has a coupling member having a planar " + " shape for engagement with a column supporting a horizontal skeleton structure ( 124 is formed. In this case, the pair of pipes P3 and P4 or P5 and P6 protruding in four directions of the connecting member 120 may be coupled to the straight member 110 and the pipes P1 and P2 of the straight member 110. Have the same separation distance as

Here, the linear member 110 and the connection member 120 is coupled so that the flange (F1, F2) formed at the end contact with each other when the adjacent linear member or the connection member is coupled, fastened by a bolt to facilitate detachability Therefore, the flange (F1, F2) is formed with a plurality of fastening holes (h) through which the bolt penetrates.

On the other hand, the pipes P1 to P6 used for the linear member 110 and the connecting member 120 are circular pipes with no weak axis, and unlike the conventional H-beams, all directions such as x-axis, y-axis, and z-axis are used. Has very large stiffness against In addition, when the horizontal skeleton structure 100 is installed, the non-shrink mortar is injected into the straight member 110 and the connection member 120 to finish the buckling stiffness in all directions.

Figure 2c is a perspective view showing another embodiment of the connecting member of the horizontal skeleton structure of Figure 1, as shown in the figure, the other embodiment 110 'is the same shape and configuration as the straight member 110 of Figure 2a The plate 112 'connecting the pair of pipes is formed of two or more unit plates 112a' and 112b ', and is spaced apart from each other. At this time, the unit plates (112a ', 112b') is to prevent the deflection of the horizontal skeleton structure is formed of two or more as necessary.

Figures 3 to 9 are described in detail with reference to the process road, the drawing of the earth retaining construction using the present invention horizontal skeleton structure as follows.

Soil wall 220 is installed around the ground 210 where the underground structure is constructed as shown in FIG. In addition, the center pile 230 is installed to increase the strength of the foundation ground and support the horizontal skeleton structure installed thereon. When the installation of the retaining wall 220 and the center pile 230 is completed, as shown in FIG. Then, pour the rim beam (240a) horizontally along the inner wall surface of the retaining wall 220, and install a horizontal skeleton structure (100a) between the rim beam (240a) that is installed opposite, the horizontal skeleton structure It is installed so that 100a is mounted on the center pile 230. Here, when the rim beam 240a is poured, as shown in FIG. 5, a predetermined groove 242 is formed at a portion to which the horizontal skeleton structure 100a is coupled, which is the horizontal skeleton structure 100a. In order to compensate for the length error, the installation of the horizontal skeleton structure (100a) is applied to the non-shrink mortar.

When the installation of the horizontal skeleton structure (100a) is completed through the above process, as shown in FIG. Then, a new rim beam 240b and a horizontal skeleton structure 100b are placed and installed on the inner wall surface of the excavated ground wall 220. At this time, the rim beam 240b and the horizontal skeleton structure 100b are installed to be spaced apart in a vertical direction from the rim beam 240a and the horizontal skeleton structure 100a installed at the lower ground level.

By repeating the above process as shown in Figure 7, excavated to the lower three basement floor and the horizontal skeleton structure (100c) is installed, using a reinforced concrete to pour the mat slab 250 on the bottom of the ground (210). Next, a vertical reinforcing member 260 is installed between the connecting members 120a, 120b, and 120c of the horizontal skeleton structures 100a, 100b, and 100c, and the center pile 230 is removed as shown in FIG. . At this time, the reason for installing the vertical reinforcement support 260 is to prevent sagging of the horizontal skeleton structure (100a, 100b, 100c) and to use later as a pillar of the permanent structure.

Lastly, as shown in FIG. 9, when the column 270 is constructed on the vertical reinforcing member 260, and the underground structure 200 is formed using the horizontal skeleton structures 100a, 100b, and 100c as a permanent structure, all of the underground structures 200 are formed. The process is complete.

As described above, although the configuration and process of the horizontal skeleton structure and the underground soil support method using the same according to the preferred embodiment of the present invention is shown in accordance with the above description and drawings, this is merely described as an example and the technical features of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit.

As described above, in the present invention, the horizontal skeletal structure and the underground soil support method using the same have very high buckling reliability in the x-axis, y-axis, and z-axis directions due to the use of a horizontal member having no weak axis. The use of hypothetical vertical members can be minimized.

In addition, by minimizing the use of vertical members, it is possible to expand the internal space of the earthenware structure, so it is easy to break the work, and because the horizontal brace is used as a permanent structure instead of a temporary structure, there is no need to install along the permanent structure, thereby reducing the amount of work. And, it can eliminate the inconvenience of construction due to the overlap of the temporary structure and the permanent structure.

In addition, it is applicable to both the net pouring method and the reverse pouring method, which is a general method for constructing underground structures, and it is economical because it can shorten the air.

Claims (9)

In the horizontal skeleton structure of the building, The horizontal skeleton structure, A linear member composed of a pair and connected to each other by a plate and integrated; Horizontal frame structure, characterized in that consisting of a "#" shaped connection member coupled to the point where the straight member intersects. The method of claim 1, Horizontal armature structure, characterized in that the flange having a plurality of through-holes are formed at the end of the linear member and the connection member to be screwed. The method of claim 1, The connecting member is a horizontal skeleton structure, characterized in that the coupling member for coupling with the pillar supporting the horizontal skeleton structure in the center thereof in the vertical direction. The method of claim 1, The plate is a horizontal skeleton structure, characterized in that the plurality is formed spaced apart from each other. The method according to any one of claims 1 to 4, The unit member constituting the linear member and the connecting member is formed of a pipe, the horizontal cross-section is characterized in that the cross section of the pipe is formed in a circular shape. The method of claim 5, The horizontal skeleton structure is characterized in that the non-shrink mortar is filled in the pipe. The method of claim 6, The horizontal skeleton structure is a horizontal skeleton structure, characterized in that used as a brace structure for supporting the earth wall is installed in every layer during the trench process. A first step of installing the retaining wall and the center pile around the ground on which the underground structure is constructed; A second step of excavating the ground by a predetermined depth and discharging the soil; A third step of placing the rim beam inside the retaining wall; A fourth step of installing on the frame beam such that the horizontal frame structure according to any one of claims 1 to 3 is mounted on the center pile; A fifth step of excavating the ground further by one layer and removing the soil; A sixth step of sequentially excavating the ground to a desired depth by repeatedly repeating the third, fourth, and fifth steps and installing the horizontal skeleton structure in multiple stages; A seventh step of installing a mat slab on the ground of the ground excavated through the above process; An eighth step of installing a vertical reinforcing member between the connecting members of the horizontal frame structure installed in multiple stages; A ninth step of removing the center file; A tenth step of constructing a pillar in the vertical reinforcing member and forming an underground structure using the horizontal skeleton structure as a permanent structure; Underground retaining method, characterized in that consisting of. The method of claim 8, Underground mud brace method, characterized in that a predetermined groove is formed on one surface of the rim beam in order to correct the length error of the horizontal frame structure is installed in the fourth step.

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