KR102333978B1 - Pileless-up wall demolition method - Google Patents

Abstract

The present invention can be demolished on the premise that the H-pile is not kept in the soil wall (4), that is, no pile, and also core drilling and small After drilling with a drill, insert a micro-pile (diameter 21.5cm; 5) and follow the post pile (3). When the basement wall (1) is removed, it is removed in width × length: 2m × 5m. At this time, the left and right underground walls ( 1) is an invention related to a no-pile-up wall demolition method, which is demolished on a small scale (based on soil analysis) at an angle so that it is maintained at an interval of 5 m or more.

Description

PILELESS-UP WALL DEMOLITION METHOD

The present invention relates to a no-pile lifting-type wall demolition method, and more particularly, to a no-pile lifting-type wall demolition method for demolishing an underground wall in a state where there is no H-pile in the soil wall.

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The bottom-up sequential removal and sequential reclamation method for removing underground retaining walls are known in Republic of Korea Patent Publication No. 0736241 (hereinafter referred to as the preceding document), and this prior document is based on the premise that the H-piles remain in the soil wall. Demolition work was impossible if there was no H-pile in the soil wall with one construction method.
Usually, in the past, H-piles were stored after the construction of underground structures (the H-piles were not pulled out), but in recent years, about 50% of the H-piles are kept in the soil wall and the remaining 50 % is drawing.
The bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art literature is also possible on the premise that the H-pile remains in the soil wall. is impossible

Republic of Korea Patent Publication No. 0736241 (June 29, 2007)

An object of the present invention is that the H-pile is not present in the soil wall, that is, it can be removed on the premise that there is no pile, and after drilling the basement foundation with a core drill and a small drill to support the post pile, the micro pile When the underground wall is removed, it is removed in width × length: 2m × 5m. At this time, the left and right underground walls are removed at an angle at an angle to ensure safety and convenience by continuing the post piles. It is to provide a method of demolition of a pile-free raised wall.

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The present invention for achieving the above object is based on the assumption that the H-pile is not retained in the soil wall before construction; A first process of installing a post pile by drilling a hole in the slab, and installing a jack support on each floor designed by structural calculation; a second process of descending while removing the slab and internal miscellaneous materials; a third process of removing the slabs and columns and descending from the 1st to the 6th floor while installing walls and struts on each floor; The fourth process of removing the subterranean foundation by removing it with a wheel saw, core, and buster, and at this time loading and unloading waste from time to time, backfilling and compacting, and at the same time dismantling the wall and strut; In the pile-free wall demolition construction method comprising a fifth step of continuously working backfilling and compaction, and then performing the drawing of the post pile after the top bare ground and handing it over to a civil engineering company; The first process includes installing a micropile (diameter 21.5 cm) in the basement foundation and inserting the post pile through a hole drilled in the slab so that it continues on the micropile; In the fourth process, after the basement foundation is removed, the basement wall demolition is performed by installing the lowest end of the wall and strut as low as possible according to the design in a line without structural problems. The basic feature in terms of its technical configuration is that it is demolished at 5 m, but includes the removal of the left and right underground walls at an angle so as to maintain an interval of 5 m or more.

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The present invention can be demolished on the premise that there is no H-pile in the soil wall, that is, no pile, and drilling the basement foundation with a core drill and a small drill to support the post pile and then inserting a micro pile The post pile is continued and when the underground wall is demolished, the width × length: 2m × 5m is demolished. have.

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Figure 1a is a schematic cross-sectional view for explaining the no-pillar wall demolition construction method according to the present invention.
Fig. 1B is an enlarged view of portion AA of Fig. 1A;
Figure 2 is a reference view for explaining the no-pile lifting type wall demolition construction method according to the present invention.

A preferred embodiment of the pile-free lifting wall demolition method according to the present invention will be described with reference to the drawings, and as such an embodiment, a plurality may exist, and the object, features and advantages of the present invention can be achieved through these embodiments. you will be able to better understand
1a is a schematic cross-sectional view for explaining the no-pile-up wall demolition method according to the present invention, FIG. 1b is an enlarged view of part AA of FIG. 1a, and FIG. 2 is a pile-free lifting type wall demolition method according to the present invention It is a reference diagram for explanation.
The no-pile lifting-type wall demolition method according to the present invention is suitable for demolition of underground retaining walls of retaining construction, as shown in FIGS. Assuming a pile (normally, the H-pile is to be piled in the soil wall 4 adjacent to the underground wall 4 so that the soil of the soil wall 4 does not collapse by the earth pressure).
And, the pile-free lifting wall demolition method according to the present invention uses a core drill and a small drill when installing a micro pile (diameter 21.5 cm; 5) to support the post pile (3). After that, the micro-pile (5) is driven in so that the post-pile (3) can be continued down.
On the other hand, the conventional demolition methods such as the bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art literature are based on the retention of H-piles and earth plates in the soil wall 4 in the demolition stage of the underground wall 1 . Since it is possible to block the earth pressure on the wall, it can be demolished with a margin of 7m in height * 15m in width, whereas the pile-free lifting type wall demolition method according to the present invention uses no piles, so when removing the basement wall (1), width × length: 2m It is to be demolished at ×5m, and at this time, the left and right underground walls (1) can be removed at an angle so that they remain at least 5m apart.
A detailed description of the method of removing a pile-free lifting type wall according to the present invention is as follows.

It is assumed that the H-pile is not kept in the soil wall (4).

A hole S1 is drilled in the slab S, and a post pile 3, that is, a central pile (central side post pile 3) and a corner pile (corner side post pile 3) is installed.

Install jack support (J) on each floor designed by structural calculation.

Descend while removing the slab (S) and internal miscellaneous materials. In general, 300 × 300 × 10 × 15 mm strut (STRUT; 7) is used, but the PPS (Prestressed Pipe Strut) method using a steel pipe with a diameter of 800 mm is applied to provide a sense of structural safety. In addition, it is possible to increase safety by applying the structurally proven temporary retaining method that is generally used.

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The slab (S) and columns are removed, and the walls (13) and struts (7) are installed on each floor, going down from the 1st to the 6th floor.

To support the post pile (central pile and corner pile; 3), install a micro pile (21.5 cm in diameter; 5), drill the basement foundation (9) using a core drill and a small drill, and then put the micro pile (5) on it. The old book post pile 3 is put down (the post pile 3 is put up on the micro pile 5).

Remove and dismantle the basement foundation (9) with a wheel saw, core, and buster. At this time, the waste is loaded from time to time.

It goes up while frequently backfilling and compacting, and dismantling the wall (band length; 13) and strut (7).

After demolition of the basement foundation (9), the demolition of the basement wall (1) is to install the lowest end of the wall (13) and strut (7) as low as possible according to the design in a line without structural problems [heavy equipment (B shown in Fig. 1) ), install it as low as possible according to the design up to the height where it can be activated].

When dismantling the underground wall (1) horizontally × vertically: 2m × 5m, the left and right underground walls (1) are to be removed at an angle so that they remain at least 5m apart. The reason for this is as follows. In the past, to prevent earth pressure by retaining H-piles and earth plates on the earth wall (4), 7 m in height × 15 m in width were removed. However, since the pile-free wall demolition method according to the present invention is no pile, the earth pressure is minimized by reducing the width to height × width: 2 m × 5 m to prevent the soil from collapsing. In addition, when horizontally continuous demolition without H-piles and earth plates, structural problems may occur in earth pressure. Therefore, depending on the geology, it will be demolished at a small angle of 2 m × 5 m after soil analysis.

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Backfill and compaction are continuously performed.

After the upper part is bare, the drawing is carried out, and then it is handed over to the civil engineering company.
If the above-mentioned pile-free lifting wall removal method of the present invention is described more clearly, it is assumed that the H-pile is not retained in the soil wall 4 before construction; A first step of installing a post pile (3) by drilling a hole (S1) in the slab (S), and installing a jack support (J) on each floor designed by structural calculation; a second process of descending while removing the slab (S) and internal miscellaneous materials; The third process of going down from the 1st to the 6th floor while removing the slab (S) and columns and installing walls (13) and struts (7) on each floor; The 4th process of removing the basement foundation (9) by removing it with a wheel saw, core, and buster, and dismantling the wall (13) and strut (7) as well as frequently backfilling and compacting while loading the waste from time to time; ; After continuous backfilling and compaction, the 5th process of drawing out the post pile (3) after the top bare ground and handing it over to a civil engineering company is included, and the first process is a micropile (diameter) on the basement foundation 9. 21.5 cm;5) and inserting the post pile (3) through the hole (S1) drilled in the slab (S) so as to be connected to the micro pile (S5); In the fourth process, after the basement foundation (9) is removed, the basement wall (1) is demolished with the lowest end of the wall (13) and strut (7) installed as low as possible according to the design in a line with no structural problems. (1) Width × Length: Demolition of 2m × 5m includes the removal of the left and right underground walls (1) at an angle so that the interval is 5m or more.
At this time, in the third process, a strut 7 having a size of 300 mm × 300 mm × 10 mm × 15 mm is generally used, but a PPS method using a steel pipe having a diameter of 800 mm is applied to provide a sense of structural safety and has been generally used. Structurally proven temporary facility retaining method is applied to increase safety.
And, in the first process, when installing a micropile (diameter 21.5cm; 5) in the basement foundation 9 to support the post pile 3, respectively, drill the basement foundation 9 with a core drill or a small drill to support the micro pile Put (5) in and let the post pile (3) go down.

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1: basement wall
2: stairs
S: slab
S1: hole
3: Post file (central file, corner file)
J : Jack Support
4: soil wall
5: Microfile
7: Strut
9: Underground foundation
11: 100Ton Jackie
12 : stiffener
13 : WALL
14 : bracket
B: heavy machinery

Claims (6)

It is assumed that the H-pile is not kept in the earth wall (4) before construction;
A first step of installing a post pile (3) by drilling a hole (S1) in the slab (S), and installing a jack support (J) on each floor designed by structural calculation; a second process of descending while removing the slab (S) and internal miscellaneous materials; a third process of removing the slab (S) and pillars and descending from the 1st stage to the 6th stage floor while installing the walls (13) and struts (7) on each floor; The 4th process of removing the basement foundation (9) by removing it with a wheel saw, core, and buster, and at this time loading and unloading waste from time to time, backfilling and compacting, and dismantling the wall (13) and strut (7) ; In the pile-free wall demolition construction method including a fifth step of continuously working backfilling and compaction, then performing the drawing operation of the post pile (3) after the top bare mounting and handing it over to a civil engineering company;
In the first process, a micropile (diameter 21.5 cm; 5) is installed in the basement foundation 9, and the post pile 3 is inserted through the hole S1 drilled in the slab S, and the micropile ( 5) including those made to run above;
In the fourth process, after the basement foundation 9 is removed, the basement wall 1 is removed as low as possible according to the design in a line where there is no structural problem with the lower end of the wall 13 and the strut 7 Demolition of the underground wall (1) horizontally × vertically: 2 m × 5 m, but comprising removing the left and right underground walls (1) at an opposite angle to keep the interval of 5 m or more Method. According to claim 1,
In the third process, the strut 7 of 300 mm × 300 mm × 10 mm × 15 mm is generally used, but the PPS method using a steel pipe with a diameter of 800 mm is applied to provide a sense of structural safety, and to provide a structural sense of safety that has been generally used A pile-free lifting type wall demolition method, characterized in that the safety is increased by applying the proven temporary facility retaining method. According to claim 1,
In the first process, when installing the micro-piles (diameter 21.5 cm; 5) to the basement foundation 9 to support the post piles 3, respectively, drill the basement foundation 9 with a core drill or a small drill. A pile-up wall demolition method, characterized in that the micro-pile (5) is driven and the post-pile (3) is brought down.
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