KR20210090100A - In a building where the underground structure is a wall structure, the shortened construction type top down construction method and structure that enables early ground frame start using temporary transfer structures - Google Patents

Abstract

The present invention relates to a reverse drilling method of building construction, and provides a construction period shortened reverse drilling method and a structure enabling early ground-frame construction by using a temporary transition structure in a building where an underground structure for construction is a wall-type structure. In a building where an underground structure is a wall-type structure, a temporary transition structure such as transition slabs or transition beams is installed in consideration of the load of an above-ground frame constructed in an UP-UP method or Top-Down method on a top basement floor (reverse drilling start floor). Therefore, in the case of underground construction, it is possible to shorten the construction period by allowing simultaneous construction of above-ground frames. The present invention includes a retaining wall and a plurality of main posts.

Description

In a building where the underground structure is a wall structure, the shortened construction type top down construction method and structure that enables early ground frame start using temporary transfer structures}

The present invention is a wall-type structure for an underground structure that enables the construction of an underground frame and the early start of the above-ground structure at the top by forming a temporary transition structure on the uppermost basement level in the downward construction of a building in which the underground structure is a wall-type structure. It relates to a short-term reverse drilling method and structure in which an early ground framing can be started using a temporary transition structure in a building.

For the construction of architectural structures such as buildings and apartments, after excavating the ground to a certain depth of the basement floor, the frame of each basement level is sufficiently formed from the excavated basement to the upper part, and the top-down method of constructing the above-ground structure is selected. do.

In this reverse drilling method, earth pressure is supported by installing a retaining barrier on the outer wall of the underground space to prevent the soil from collapsing, and as the excavated underground space and area increase, the earth pressure acting on the earth barrier and the load of the above-ground construction structure are reduced. As the underground structure to withstand the increase increases, the construction period becomes longer.

In the reverse drilling method, the support structure of the basement floor is to create a structure that can sufficiently withstand vertical and horizontal loads for the construction of above-ground structures. SRC, lamp, etc. by RC coating of part and core wall, and main post are constituted.

As such, in the conventional reverse drilling method, the above-ground structure must be constructed after the sequential pouring of the foundation concrete and slab from the floor is completed after excavation of the underground structure, and the above-ground structure must be installed after the underground excavation operation.

In general, if an underground structure composed of beams and columns is of the Ramen type, the UP-UP method or Top-Down method is applied in reverse construction of the underground structure.

For reference, the UP-UP method is a method of concurrently constructing the above-ground framing when constructing the basement floor after the basement floor is down-constructed and the foundation construction is completed. .

The UP-UP method and the Top-Down method are designed to improve underground construction and above-ground framing by constructing several cast-in-place piles for parallel construction of above-ground structures and pre-construction steel pillars around the core consisting of the main eastern column position and the elevator and stairwell. Parallel construction is possible.

However, when the underground structure of a building is a wall-type structure, it is virtually impossible to construct cast-in-place piles and pre-construction steel columns that enable parallel construction of above-ground frames for all long and short walls.

Therefore, in the underground wall-type structure under the above conditions, the Down-UP method of starting the above-ground framing after completing all of the down-construction of the basement floor, the foundation construction, and the remaining underground framing (walls, etc.) must be applied. There was a difficult aspect in which it was impossible to shorten the construction period.

Korean Patent Registration No. 10-1632701 (2016.06.22. Announcement)

The present invention was devised to solve the above-mentioned problem of shortening the period, and in a building in which the underground structure is a wall-type structure, the above-ground frame is constructed in the UP-UP method or the Top-Down method on the uppermost basement floor (reverse start floor) By installing temporary transition structures such as transition slabs or transition beams in consideration of the load of It is to provide a short-term reverse drilling method and structure that enables early ground frame construction by using a temporary transition structure.

According to the present invention for achieving the above object, an air shortening type reverse drilling method structure in which an early ground framing can be initiated using a temporary transition structure in a building in which the underground structure for construction is a wall structure, comprising: a retainer for forming an underground space; a plurality of main posts located inside the retaining wall and installed upright in the ground from the inside of the retaining wall; a temporary transition structure mounted on a portion of the plurality of main posts from the inside of the retaining wall and installed horizontally on the ground to provide a construction area for supporting the above-ground structure; a first horizontal connection part horizontally connecting a portion of the plurality of main posts supporting the temporary transition structure on each basement floor corresponding to the temporary transition structure; and a second horizontal connection part connecting the retaining wall and the temporary transition structure from the outside of the temporary transition structure.

The present invention includes a plurality of basement slabs poured from the top to the bottom for each floor of the plurality of main posts; and a plurality of underground walls installed and installed together with the basement slab in an underground area corresponding to the temporary transition structure.

The present invention is a base concrete that is poured on the ground in which the main post is buried in the interior of the retaining wall; a plurality of basement slabs sequentially poured from the bottom to the top for each floor of the plurality of main posts on the foundation concrete; and a plurality of underground walls installed and installed together with the basement slab in an underground area corresponding to the temporary transition structure.

The temporary transition structure may be provided as a transition slab or transition beam, and the first horizontal connection part and the second horizontal connection part may be provided as a strut or a slab.

The present invention may further include a ground frame installed on the temporary transition structure.

In a building in which the underground structure for construction is a wall-type structure according to the present invention, the air-shortened reverse drilling method in which an early ground framing can be started using a temporary transition structure includes a retaining installation step of vertically installing a retaining wall around a construction area; Installing a plurality of main posts in the interior of the retaining wall; horizontally installing a temporary transition structure to provide a ground area on a part of the plurality of main posts; Excavating in order by a predetermined depth along the main post in the interior of the retaining wall; and horizontally connecting a portion of the plurality of main posts by a first horizontal connection unit according to the excavation depth along the main post; and horizontally connecting a portion of the plurality of main posts and the retaining unit by a second horizontal connection unit; including, the retaining wall, a portion of the plurality of main posts, a temporary transition structure, and the first and second horizontal connecting units, A structure for supporting the construction load of the above-ground structure is formed with respect to the ground on which the main post is installed.

The present invention comprises the steps of: pouring a plurality of basement slabs from the top to the bottom for each floor of the plurality of main posts; and pouring and installing a plurality of underground walls together with the basement slab in an underground area corresponding to the temporary transition structure.

The present invention comprises the steps of: pouring the foundation concrete on the ground in which the main post is buried in the interior of the retaining wall; pouring a plurality of basement slabs from the bottom to the top for each floor of the plurality of main posts on the foundation concrete; and pouring a plurality of underground walls together with the basement slab in an underground area corresponding to the temporary transition structure.

The present invention may further include; installing a ground frame on the temporary transition structure.

The present invention is for temporary use such as a transition slab or a transition beam in consideration of the load of the above-ground frame constructed in the UP-UP method or Top-Down method on the uppermost basement floor (reverse start floor) in a building in which the underground structure is a wall structure. By installing the transition structure, it is possible to provide parallel construction of the above-ground frame even in the case of underground construction, thereby reducing the construction period and providing a construction method using the same.

1 is a schematic plan view of a shortened construction period in which an early ground frame construction is possible using a temporary transition structure in a building in which an underground structure is a wall structure according to an embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1 .
3 is a schematic cross-sectional view taken along line A-A' of FIG. 1 .
4 is a flowchart of a short-term reverse drilling method in which an early ground framing can be started using a temporary transition structure in a building in which the underground structure is a wall structure according to the present invention.
5 is a cross-sectional view of the coupling structure of the temporary transition structure and the horizontal member according to an embodiment of the present invention.
6 is a cross-sectional view of another coupling structure of a temporary transition structure and a horizontal member according to an embodiment of the present invention.

Hereinafter, it will be described in more detail with reference to preferred embodiments to which the present invention pertains.

1 to 3, the construction of an air shortening type reverse perforation method in which an early ground framing can be started using a temporary transition structure in a building in which the underground structure is a wall structure according to an embodiment of the present invention, by providing an underground outer wall A retaining wall 100 for forming an underground space, a plurality of main posts 110 located in the inner area of the retaining wall 100 and installed upright deeper than the retaining wall 100, a plurality of main posts in the interior of the retaining wall 100 ( 110), a temporary transition structure 120 that is mounted and installed on a partial area to provide a ground construction area, a first horizontal connection part 131 that connects a plurality of main posts 110, and a plurality of main posts 110 and a retaining wall It includes a second horizontal connecting portion 132 for connecting (100).

In this embodiment, first, in a state in which the retaining wall 100 is installed, the temporary transition structure 120 is installed horizontally on the ground on the main post 110 in some area, and each lower floor of the main post 110 is installed. to connect the main posts 110 supporting the temporary transition structure 120 by the first horizontal connection part 131, and connect the main posts 110 to the retaining wall 100 by the second horizontal connection part 132 By doing so, the task of providing a temporary support structure for the main eastern position where the above-ground building can be constructed on the temporary transition structure 120 is performed.

The main post 110 is a steel frame structure such as on-site pile casting or H-beam, and the lower end is installed in the vertical direction by a percussion rotary drill (PRD) method, etc., and the upper end passes through the inside of the temporary transition structure 120 or It is embedded inside and fixedly installed.

This main post 110 is installed in the construction area where the retaining wall 100 is installed, and may be installed in an orderly area different from the area where the temporary transition structure 120 is installed.

The temporary transition structure 120 is to be installed on some of the main posts 110 for supporting the above-ground frame of the above-ground building among the main posts 110 installed upright inside the retaining wall 100, and the construction of ground load It serves to transfer the load generated according to the main post 110 to the ground under the basement floor. Accordingly, the ground load in the temporary transition structure 120 is sufficiently transmitted to the ground side by the main posts 110 .

This temporary transition structure 120 is provided as a transition beam having an open shape of a block-shaped transition slab or an interconnected frame structure filled with concrete as a whole, and the load of the above-ground frame 160 is applied to the main post 110. It has a thickness that can sufficiently withstand compression, shear, or bending while delivering it, but does not limit the interlayer height of the lower basement, and is preferably manufactured to an appropriate thickness within 3 m.

The temporary transition structure 120 is a RC structure in which concrete is poured and cured so that the upper end of the main post 110 is buried, or a precast concrete in which the main post 110 can be combined, and the upper end of the main post 110 is available. It can be installed if it has a structure that can be mounted to and fixed in a stable position.

The temporary transition structure 120 is disposed in an arrangement area of a building to be constructed, and in the case of a plurality of buildings, is installed corresponding to the building arrangement area.

As an example, the temporary transition structure 120 is a flat concrete block having a certain thickness, and when the building construction work is to dismantle and excavate the existing building and construct it, the underground 1 is excavated to a certain depth from the ground floor of the existing building. It may be installed on the main post 110 installed in advance after filling a certain height at the bottom of the floor. In this case, after the temporary transition structure 120 is installed on the main post 110 , the fill in the lower portion of the temporary transition structure 120 is removed for the subsequent floor and excavation work.

After the temporary transition structure 120 is installed, the remaining structure and underground soil of the old building are removed to a depth of one floor underground, and the temporary transition structure 120 is integrally fixed with the retaining wall 100 .

A first horizontal connection part 131 and a second horizontal connection part 132 are installed in the lower part and the side wall part of the temporary transition structure 120 . The first horizontal connection part 131 and the second horizontal connection part 132 may be provided in a strut or slab structure.

In the above, when the first horizontal connection part 131 is provided as a strut and installed as a strut, an upper and lower open space is provided, and when it is provided as a slab, the horizontal slab is located in the blocked area except for the opening for underground construction. (150).

The first horizontal connection part 131 is sequentially installed according to the excavation from the first basement level to a deeper layer in the depth direction according to the excavation, and the second horizontal connection part 132 is to be installed together with the first horizontal connection part 131. can

When the first horizontal connection part 131 and the second horizontal connection part 132 are formed of a slab, it may be provided in an RC structure, but is not limited thereto, and a deck plate may be used.

The second horizontal connection part 132 transfers the load between the retainer 100 and the main post 110 to distribute the earth pressure load of the retainer 100 or the lateral load applied to the main post 110 to provide a stable underground structure. will play a role

As described above, according to this embodiment, the retaining wall 100, the main post 110, the temporary transition structure 120, and the first and second horizontal connection parts 131 and 132 are the loads of underground excavation and ground construction. It forms a cross-sectional shape connected like “┏┳┓” for supporting, and forms a structure capable of supporting axial and lateral loads for construction of the above-ground frame 160 .

In the case in which the second horizontal connection part 132 is provided by being poured into a horizontal slab, the basement wall 155 supporting the interlayer may be formed together. The underground wall 155 supports the load acting in the vertical, horizontal and shear directions.

As the second horizontal connection part 132 is installed from the top to the bottom for each floor, the underground wall 155 is formed together, so that the load acting on the main post 110 is transmitted to and supported by the underground wall 155, and the base is at the bottom. When the concrete 140 is poured and installed, the underground wall 155 serves to completely transfer the load acting on the main post 110 to the base concrete 140 side.

In the top-down construction, the basement wall 155 and the basement slab 150, which are vertical joint structures supporting the first horizontal connection parts 131 constituting the floors, are installed together with excavation from the top to the bottom to provide the basement wall 155 ) can be completed until the excavation is completed.

As described above, according to this embodiment, in a state in which the main posts 110 are installed, the temporary transition structure 120 , and the first and second horizontal connection parts 131 and 132 are installed from top to bottom for each floor. , It is possible to construct a top-down (Top-Down) installation of the above-ground frame 160 to the temporary transition structure (120).

The above-ground frame 160 according to this embodiment is to be constructed on the transition structure 120 for temporary construction before or at the same time as the foundation concrete 140 and the basement slab 150 according to the selection of the construction method during top-down and up-up. It may be constructed while the basement slab 150 is formed along with the pouring of the foundation concrete 140 .

In the above, the reverse perforation structure using the temporary transition structure 120 capable of top-down construction has been described. Hereinafter, the basement slab 150 and the basement wall 155 are completed in the state where the basement slab 150 and the basement wall 155 are completed as described above. In the state that the remaining and above-ground frames 160 are installed, or the underground slabs 150 and the underground walls 155 are omitted and the underground excavation is completed, the basement slabs 150 and the basement wall ( 155) and at the same time installing the remaining underground frame and the above-ground frame 160 will be described a reverse drilling method structure capable of up-up construction.

In another embodiment, after the underground excavation is completed according to the up-up construction, the main post 110 is poured on the ground in which the main post 110 is buried inside the retainer 100, a plurality of main concrete 140 on the foundation concrete 140. A plurality of basement slabs 150 that are sequentially poured for each floor of the post 110, and a plurality of basement walls 155 that are sequentially poured and installed together with the basement slab 150 in an underground area corresponding to the ground load slab ) is further included.

When the first and second horizontal connection parts 131 and 132 are provided as struts, the basement slab 150 may be sequentially poured from the basement to the ground side on the foundation concrete 140 and installed, and a plurality of underground walls 155 ) is to form a core wall that partitions an underground space or supports the main body in the basement of a building, and is formed vertically on the basement slab 150 together with the pouring of the basement slab 150 .

The underground wall 155 can form a column structure that supports the vertical axial force of the temporary transition structure 120 and the first horizontal connection part 131 to the concrete foundation 140, and divides the underground space. The process for forming walls in a space can be replaced with a predecessor work.

As described above, in the present embodiments, the temporary transition structure 120 is installed on the main post 110, and the first and second horizontal connection parts 131 and 132 are installed, and the above-ground structure according to the above-ground construction ( 160), the above-ground wall is poured on the temporary transition structure 120, and the above-ground slab is poured on the above-ground wall to construct the above-ground frame 160. can

Hereinafter, an air shortening type reverse drilling method in which an early ground framing can be initiated using a temporary transition structure in a building in which the underground structure is a wall structure according to an embodiment of the present invention will be described.

1 to 4, in the building in which the underground structure is a wall-type structure according to an embodiment of the present invention, the air shortening type reverse drilling method that enables early ground frame construction using a temporary transition structure is a retaining wall ( The retaining wall 100 installation step of vertically installing 100), the step of installing a plurality of main posts 110 in the interior of the retaining wall 100, the plurality of main posts 110 for temporary installation to provide a part of the ground area on the top A step of horizontally installing the transition structure 120, a step of sequentially excavating a predetermined depth along the main post 110 in the interior of the retaining wall 100, and a plurality of main steps according to the excavation depth along the main post 110 A step of horizontally connecting a part of the post 110 and the temporary transition structure 120 by a first horizontal connection part 131, and a part of the plurality of main posts 110 and the retaining wall 100 with a second horizontal connection part ( 132) by horizontal connection.

In this embodiment, the retaining wall 100, a portion of the plurality of main posts 110, the temporary transition structure 120, and the first and second horizontal connection parts 131 and 132 are the main posts 110 installed in the ground. To form a structure for supporting the construction load of the above-ground frame (160).

According to this embodiment as described above, since the underground support structure for the construction of the above-ground frame 160 is secured, the top-down construction and excavation of constructing the above-ground frame 160 on the temporary transition structure 120 together with excavation In this completed state, it is possible to selectively perform up-up construction for constructing the above-ground frame 160 .

In the top-down construction in which the excavation and the above-ground frame 160 are constructed together as described above, the underground wall 155 is installed as an RC structure to complete the excavation and at the same time to complete the excavation, regardless of the support of the temporary transition structure 120, the above-ground structure ( 160) through the underground wall 155 and the main post 110, it is possible to secure a support structure that can sufficiently support the ground.

On the other hand, in the air shortening type reverse drilling method according to this embodiment, after the underground excavation is completed according to the up-up construction, pouring the foundation concrete 140 on the ground where the main post 110 is buried inside the retaining wall 100 , sequentially pouring a plurality of basement slabs 150 for each floor of the plurality of main posts 110 on the foundation concrete 140, and the basement slab in the underground area corresponding to the temporary transition structure 120 ( The step of sequentially pouring a plurality of underground walls 155 together with 150) may be further included.

In this up-up construction, the basement slab 150 is installed from the basement floor to the upper floor together with the foundation concrete 140 and the basement wall 155, and at the same time, the above-ground frame 160 is constructed on the temporary transition structure 120. work is going on

In the present embodiments as described above, in a building in which the underground structure is a wall-type structure, a transition slab or transition is taken in consideration of the load of the above-ground structure constructed in the UP-UP method or Top-Down method on the uppermost basement floor (reverse start floor). By installing the temporary transition structure 120 such as a beam, parallel construction of the above-ground frame is possible even during underground construction, thereby providing the advantage of shortening the construction period.

On the other hand, referring to FIG. 5 , in the present embodiments, a “L”-shaped support bracket installed on the sidewall of the temporary transition structure 120 and supported by a stratum slab that is the second horizontal connection part 132 is mounted on it ( 170), and a chemical anchor 171 for fixing the lower portion of the support bracket 170 to the sidewall of the temporary transition structure 120 is further included.

The support bracket 170 supports the stratum slab connected to the temporary transition structure 120 , and is firmly fixed to the temporary transition structure 120 by a chemical anchor 171 . The chemical anchor 171 is an anchor for injection-type adhesion, and an epoxy adhesive may be used as an adhesive of the anchor.

Referring to FIG. 6 , in this embodiment, an embedded plate 180 that is embedded in the sidewall of the temporary transition structure 120 , extends from the embedded plate 180 and is installed inside the temporary transition structure 120 . A hook reinforcing bar 181 in the shape of a "a" hook, a plurality of stud bolts 182 for fixing the embedded plate 180 to the side wall of the transition structure 120 for temporary construction, and the embedded plate 180 are connected to for temporary construction A brace plate 183 protruding from the sidewall of the transition structure 120 is further included.

The embedded plate 180 is embedded in the side wall of the temporary transition structure 120 and fixed by the stud bolts 182 so as not to move in the side wall of the temporary transition structure 120 . A plurality of stud bolts 182 are disposed on both sides along the vertical direction of the embedded plate 180 .

The hook reinforcement bar 181 is a second horizontal connecting portion 132, which connects the side wall portion of the horizontal steel frame member usable as a permanent beam and the temporary transition structure 120 via the embedded plate 180 and the brace plate 183. As such, by being deeply buried in a hook shape into the side wall of the temporary transition structure 120 , a structure is made to firmly fix the deviation and movement from the temporary transition structure 120 .

The brace plate 183 is a pair coupled to both side wall portions between the flanges of the horizontal steel frame member to couple the embedded plate 180 and the horizontal steel frame member, and a pair is connected to the embedded plate 180, between The vertical members of the horizontal steel frame members are arranged. The pair of brace plates 183 are fastened with bolts with a vertical member therebetween.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You can do what you can do.

100: earth wall 110: main post
120: transition structure for temporary use 131: first horizontal connection part
132: second horizontal connection 140: concrete foundation
150: basement slab 155: basement wall
160: ground structure 170: support bracket
171: cable anchor 180: embedded plate
181: hook reinforcement bar 182: stud bolt
183: gas plate

Claims (6)

retaining wall to form an underground space;
a plurality of main posts located inside the retaining wall and installed upright in the ground from the inside of the retaining wall;
a temporary transition structure mounted on a portion of the plurality of main posts in the retaining wall and installed horizontally on the ground to provide a construction area for supporting the above-ground structure;
a first horizontal connection unit horizontally connecting a portion of the plurality of main posts supporting the temporary transition structure in each basement level corresponding to the temporary transition structure; and
A second horizontal connection part connecting the retaining wall and the temporary transition structure from the outside of the temporary transition structure; Air shortened reverse punching structure. The method of claim 1,
a plurality of basement slabs poured from the top to the bottom for each floor of the plurality of main posts; and
A plurality of underground walls installed together with the basement slab in an underground area corresponding to the temporary transition structure; Reverse perforation structure with shortened construction period that can start the frame. The method of claim 1,
Foundation concrete poured on the ground in which the main post is buried in the interior of the retaining wall;
a plurality of basement slabs sequentially poured from the bottom to the top for each floor of the plurality of main posts on the foundation concrete; and
A plurality of underground walls installed together with the basement slab in an underground area corresponding to the temporary transition structure; Reverse perforation structure with shortened construction period that can start the frame. A retaining wall installation step of vertically installing the retaining wall around the perimeter of the construction area;
Installing a plurality of main posts in the interior of the retaining wall;
horizontally installing a temporary transition structure to provide a ground area on a part of the plurality of main posts;
Excavating in order by a predetermined depth along the main post in the interior of the retaining wall; and
horizontally connecting a portion of the plurality of main posts by a first horizontal connection unit according to the excavation depth along the main post; and
Including; horizontally connecting a portion of the plurality of main posts and the retaining wall by a second horizontal connection unit;
The retaining wall, a portion of the plurality of main posts, the temporary transition structure, and the first and second horizontal connecting portions form a structure for supporting the construction load of the above-ground structure with respect to the ground on which the main post is installed. In a building with a wall-type structure, a shortened construction period type reverse drilling method that enables early ground framing using a temporary transition structure. 5. The method of claim 4,
pouring a plurality of basement slabs from the top to the bottom for each floor of the plurality of main posts; and
Using a temporary transition structure in a building in which the underground structure is a wall-type structure, further comprising; pouring and installing a plurality of underground walls together with the basement slab in an underground area corresponding to the temporary transition structure Short-duration type reverse drilling method that enables early ground frame start-up. 5. The method of claim 4,
pouring the foundation concrete on the ground in which the main post is buried in the inside of the retaining wall;
pouring a plurality of basement slabs from the bottom to the top for each floor of the plurality of main posts on the foundation concrete; and
In a building in which the underground structure is a wall-type structure, the method further comprising the step of pouring a plurality of underground walls together with the basement slab in the underground area corresponding to the temporary transition structure Possible air shortening type reverse punching method.

Images