KR102400229B1 - Method for demolishing underground building - Google Patents

Abstract

The present invention relates to an underground building demolishment method, in which a case injected concrete pile (CIP; C) is piled with H-beams at equal intervals on a soil wall body (B) and an underground foundation (51) is provided on an underground plane (J) at the same time so that an old underground structure (50) having an underground wall (52), slabs (53), and columns (54) is rapidly, easily, and safely demolished and then handed over to civil engineering company.

Description

How to demolish an underground building

The present invention relates to a method of demolition of an underground building, and more particularly, an old underground building having an underground wall, a slab and a column while the CIP is piled along with the H-beam at equal intervals on the earthen wall and the basement foundation is provided on the ground floor at the same time It relates to a method of demolition of an underground building so that it can be quickly, easily and safely removed and handed over to a civil engineering company.

In general, when an old underground building is demolished, it should be possible to minimize the influence on the surrounding buildings and surrounding roads.

Figure 1a is a cross-sectional view showing a raker pile and a raker installation process in explaining the bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art document (Korea Patent Publication No. 2006-0103309), Figure 1b is It is a perspective view showing a raker pile and a raker installation process in explaining the bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art document, and FIG. 1c is a bottom-up sequential removal for removing the underground retaining wall according to the prior art document And in explaining the sequential reclamation method, the bottom side raker is removed, which is no longer needed to support the retaining wall due to the progress of backfilling. It is a cross-sectional view showing the concept.

The bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art literature is proposed to fit the demolition that is not deep underground, as shown in FIGS. It is designed in a structure that is fixed to the raker pile 30 so that the raker 32 with a different inclination after driving the raker pile 30 into the inner underground supports the underground retaining wall 10 in an inclined manner.

Applying the raker 32 with a different inclination means that there must be an inside of the space that has already been demolished, and this point is that the state just before the installation of the raker pile 30 and the raker 32 is blocked by the underground retaining wall 10 Since the earth pressure can be collapsed at any time, it is inevitably exposed to a very dangerous situation if the depth of the basement is deep.

And, the soil backfill process also has no choice but to backfill the soil at an inclination (in preparation for the removal of the raker 32) due to the inclination of the raker 32 as shown in FIG. 10) is repeatedly exposed to the danger of not knowing when the soil will collapse by the earth pressure applied to it, and furthermore, the earth pressure due to the soil backfill applied to the raker pile 30 is considerable, so that bending or bending in one direction of the raker pile 30 or The bending phenomenon may appear, and in order to overcome this, the thickness or depth for the bearing capacity of the raker pile 30 has to be further considered.

After all, the bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall of the prior art document is designed to be suitable for a place that is not deep underground, and in particular, it requires a premise that there must be an inside of an already demolished space, and a raker with a different slope Due to (32), it can be confirmed that there are a number of problems, such as bending or bending of the raker pile 30, and the difficulty and risk of backfilling.

Republic of Korea Patent Publication No. 2006-0103309

An object of the present invention is to quickly, easily and safely demolish an old underground building having an underground wall, slab and column while the CIP is piled with the H-beam at equal intervals on the earth wall and the basement foundation is provided on the ground floor. It is to provide a method of demolition of an underground building that can be handed over to the

It is an object of the present invention to further fix the support angle between the H-beams adjacent to each other to support the earth plate so that the initial push of the earth wall can be suppressed in advance, so that the risk of a large-scale accident can be actively eliminated. is to provide.

An object of the present invention is to fill the waste concrete between the earth plate and the earth wall to support the initial micro-movement of the earth wall, which is under earth pressure by the surrounding buildings and surrounding roads, with the filling of the waste concrete. An object of the present invention is to provide a method of demolition of an underground building that can suppress the jungle phenomenon or collapse in advance.

It is an object of the present invention to dismantle the CIP in descending order of each basement floor and fill the blank between the earth plate and the earth wall with waste concrete, the waste concrete filled in the upper space falls into the lower space or falls in an instant, which can cause human damage. A method of demolition of an underground building that enables safer demolition work by resolving risks by supporting the waste concrete step by step in each descending order with a support plate supported by a support pin piled on the earth wall through the earth plate in the descending order of danger. is in providing.

It is an object of the present invention to form cap concrete in advance along the upper part of the H-beam exposed by the demolition of the basement wall of the first basement floor and the CIP to form a cap together with the H-beam along the upper perimeter of the underground building that receives the most earth pressure. It is shielded in a closed spherical shape as concrete so that it can withstand earth pressure in all directions at the boundary between the earth wall and the interior of the underground building. It is to provide a method of demolition of underground buildings that is guaranteed.

An object of the present invention is to provide a cap concrete as a hardening of mortar while reinforcing steel bars in a welded state to the H-beam to more actively utilize the holding force of the H-beam to overcome the earth pressure along with the braces, making it a safer underground building It is to provide a method of demolition of underground buildings that realizes the demolition of

The present invention for achieving the above object,

In the method of demolition of an underground building in which the CIP is filed along with the H-beam at equal intervals on the soil wall and the basement foundation is provided on the ground floor at the same time, the underground building having an underground wall, a slab and a column is demolished,

A first step of drilling a through hole in the slab of each basement floor so as to be supported on the basement foundation while inserting a post pile, and at the same time installing a jack support between the slabs;

In the descending order of each basement floor, along with the removal of the slab, column, basement wall, jack support and CIP, crushing and unloading of the concrete adhering to the H-beam, and then inserting the earth plate between the neighboring H-beams, A second process of installing a brace connecting the H-beam with the post pile while wearing a wale,

a third process of removing the underground foundation;

A fourth process of dismantling the braces and wales while performing soil backfilling and compaction from the basement in the ascending order of each basement floor;

A fifth process of drawing the post pile and the H-beam,

The second process further includes fixing a support angle between the adjacent H-beams to support the earth plate,

The fourth process is a basic feature in its technical configuration, further comprising dismantling the support angle in the ascending order of each basement floor.

The present invention quickly, easily and safely demolishes an old underground building having an underground wall, a slab and a column while the CIP is piled along with the H-beam at equal intervals on the soil wall and the basement foundation is provided on the ground floor, and handed over to the civil engineering company. It has the effect of making it possible.

The present invention has the effect of actively eliminating the risk of a major accident by further fixing the support angle between the H-beams adjacent to each other to support the earth plate to suppress the initial pushing of the earth wall in advance.

The present invention fills the waste concrete between the earth plate and the soil wall to support the initial micro-movement of the soil wall, which is under earth pressure by the surrounding buildings and surrounding roads, with the filling of the waste concrete. It has the effect of being able to suppress the collapse phenomenon in advance.

In the present invention, when the CIP is dismantled in the descending order of each basement floor and when the waste concrete is filled in the blank between the earth plate and the earth wall, the waste concrete filled in the upper space falls into the lower space or immediately pours into the lower space. It is a support plate supported by a support pin piled on the earth wall through the earth plate in the descending order, and it has the effect of enabling safer demolition work by resolving the risk by supporting the waste concrete in each descending order step by step.

The present invention forms cap concrete in advance along the upper part of the H-beam exposed by the demolition of the basement wall of the first basement floor and the CIP, and along with the H-beam along the upper periphery of the underground building that receives the most earth pressure as cap concrete. It is shielded in a closed spherical shape so that it can withstand earth pressure in all directions at the boundary between the earth wall and the inside of the underground building, so that the deeper the underground and the higher the surrounding buildings are, the more resistance and support to the earth pressure that receives the weight. has the effect of

The present invention provides a cap concrete as hardening of mortar while reinforcing bars in a welded state to the H-beam, and more actively utilizes the supporting force of the H-beam to overcome the earth pressure along with the braces, while making the demolition of underground buildings safer has the effect of realizing it.

Figure 1a is a cross-sectional view showing a raker pile and a raker installation process in explaining the bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art document.
Figure 1b is a perspective view showing a raker pile and a raker installation process in explaining the bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art document.
Figure 1c is a bottom-up sequential removal and sequential reclamation method for removing the underground retaining wall according to the prior art document, the bottom side raker that is no longer necessary to support the retaining wall is removed while backfilling is in progress, while the removal of the retaining wall A cross-sectional view showing the concept of pulling out the raker pile used to support the retaining wall for the completed part.
Figure 2a is a plan view schematically showing an old underground building for explaining the method of demolition of the underground building according to the present invention.
Figure 2b is a longitudinal cross-sectional view schematically showing an old underground building for explaining the method of demolition of the underground building according to the present invention.
3A to 3H are process diagrams showing a method for demolition of an underground building according to the present invention.

A preferred embodiment of the method for demolition of an underground building according to the present invention will be described with reference to the drawings, and a plurality of the embodiments may exist, and through these embodiments, the object, features and advantages of the present invention will be better understood be able to

Figure 2a is a plan view schematically showing an old underground building 50 for explaining a method for demolition of an underground building according to the present invention, and Figure 2b is an old underground building 50 for explaining a method for demolishing an underground building according to the present invention. It is a longitudinal cross-sectional view given schematically.

As shown in Figs. 2a and 2b, in the method for demolition of an underground building according to the present invention, the CIP (Cast Injected Concret Pile; C) along with the H-beams (H) at equal intervals on the soil wall (B) are piled and at the same time the underground ground (J) As the underground foundation 51 is provided above, the old underground building 50 with the underground wall 52, slab 53, and column 54 can be quickly, easily and safely demolished so that it can be handed over to a civil engineering company. do.

3A to 3H are process diagrams illustrating a method for demolition of an underground building according to the present invention.

The underground building demolition method according to the present invention is supported on the basement foundation 51 while inserting the post pile 61 by drilling a through hole 53a in the slab 53 of each basement floor as shown in FIGS. 2a to 3h. The first step (S10) of installing the jack support 62 between the slabs 53 and at the same time as possible, and the slab 53, the column 54, the basement wall 52, and the jack in descending order of each basement floor. Following the crushing and unloading of the concrete adhering to the H-beam (H) along with the removal of the support (62) and the CIP (C), the earth plate (63) is sandwiched between the adjacent H-beams (H) and the wale (64) ) with the post pile 61 and the second process (S20) of installing the brace 65 that connects the H-beam (H), and the third process (S30) of removing the basement foundation (51), The fourth process (S40) of dismantling the braces 65 and the wale 64 while carrying out the backfilling (T) and compaction from the underground ground (J) in the ascending order of each basement floor (S40), and the post pile (61) and H- A fifth step (S50) of drawing the beam (H) is included.

More specifically, the method of demolition of an underground building according to the present invention will be described as follows.

In the first process (S10), as shown in Fig. 3a, a through hole (53a) is drilled in the slab (53) of each basement floor so that it is supported on the basement foundation (51) while inserting the post pile (61) [underground foundation] It is also possible to connect the post pile 61 after driving the micropile (not shown) in the underground ground (J) via (51)] and at the same time, according to the design of the structural calculation between the slab (53), the jack support (62) ) is installed.

The second process (S20) is the slab 53, the column 54, the basement wall 52, the jack support 62 and CIP (C) in descending order of each basement floor as shown in FIGS. 3b to 3d. Following the crushing and unloading of the concrete stuck to the H-beam (H) along with the removal of the Install the brace 65 connecting the H-beam (H) with.

When the slab 53, column 54, basement wall 52, jack support 62, and CIP(C) are removed in descending order of each basement floor, the soil wall is caused by the earth pressure occupied by the surrounding buildings and surrounding roads. Since (B) can easily collapse, before the demolition of the underground building 50, the earth plate 63 is inserted between the H-beams (H) and the wale 64 is wrapped around the post pile 61 along with the H-beam ( H) is connected to the brace 65 to promote safety.

At this time, even if the earth plate 63 is inserted between the H-beam (H) while allowing the earth pressure to be overcome by the H-beam (H) and the brace (65) and furthermore the wale (64), the pushing of the earth wall body (B) As a result, the soil may flow down and pressure may be applied to the earth plate 63. If this phenomenon is not initially suppressed, a major accident may occur.

In the present invention, the initial push of the soil wall B is suppressed in advance by further fixing the support angle 66 between the H-beams H adjacent to each other to support the earth plate 63 in the second process S20. To actively eliminate the risk of a large-scale accident, preferably, the support angle 66 is fixed to the H-beam (H) in the descending order of each basement floor in the horizontal or oblique direction so that the earth plate ( 63) is supported three-dimensionally.

Furthermore, in the second process (S20), the initial fine movement of the soil wall (B), which is being subjected to earth pressure by the surrounding buildings and surrounding roads, by filling the waste concrete (P) between the earth plate 63 and the soil wall (B), is performed with the waste concrete. It can be supported with the filling of (P) so that it can suppress the pushing or collapse of the soil wall (B) according to the blank of the CIP (C) in advance.

At this time, in the second process (S20), in the descending order of each basement floor, the support pins 71 are piled on the earth wall (B) via the earth plate 63, and at the same time, the earth plate 63 and the earth wall body (B). A support plate 72 for supporting the waste concrete P is set on the support pins 71 between them so that the waste concrete P can be supported step by step.

When dismantling the CIP(C) in descending order of each basement floor, if the waste concrete (P) is filled in the blank between the earth plate 63 and the earth wall (B), the waste concrete (P) filled in the upper space becomes the lower space A support plate 72 supported by a support pin 71 piled on the earth wall (B) via the earth plate 63 in the descending order to reduce the risk of falling or instantaneous spillage. By supporting the waste concrete (P), it enables safer demolition work through risk reduction.

On the other hand, in the second process (S20), the cap concrete 80 is preformed along the upper part of the H-beam (H) exposed by the removal of the basement wall 52 and the CIP (C) of the first basement floor, and the earth pressure Along with the H-beam (H) along the upper perimeter of the underground building 50 receiving the most At the boundary between the inside of the building 50, it is possible to withstand the earth pressure in all directions, so that the deeper the underground and the higher the surrounding buildings are, the more resistance and support to the earth pressure that receives the weight.

At this time, the cap concrete 80 is provided as hardening of the mortar while reinforcing the H-beam (H) in a welded state, and the holding force of the H-beam (H) to overcome the earth pressure together with the brace 65. By using it more actively, it is possible to realize a safer demolition of the underground building (50).

On the other hand, in the third process (S30), as shown in Fig. 3e, only the area capable of supporting the post pile 61 is left and the basement foundation 51 is removed. On the other hand, when the micropile of the US city is piled in the underground ground (J) so that the post pile 61 is connected, only the micropile is left and all of the underground foundation 51 is demolished.

In the fourth process (S40), as shown in Figs. 3f and 3g, in the ascending order of each basement floor, the backfill (T) and compaction are carried out from the underground base (J) and the braces (65) and the wale (64) are dismantled. In this way, the balance of earth pressure with the earth wall (B) is realized by backfilling (T) and compaction so that it can be safely handed over to the civil engineering company.

At this time, in the fourth process (S40), the support angle 66, the support pin 71, or the cap concrete 80 are dismantled in the ascending order of each basement floor, as well as the earth plate 63 and the support plate 72 ) is made of wood, etc., so it is possible to selectively dismantle it.

In the fifth process (S50), as shown in FIG. 3H, the post pile 61 (or the post pile 61 together with the micro pile not shown) and the H-beam H are drawn out and can be handed over to the civil engineering company. is to make it

INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field for quickly, easily and safely demolishing old underground buildings.

B : Soil wall J: Underground ground
H : H-beam C : CIP
50: underground building 51: underground foundation
52: underground wall 53: slab
53a: through hole 54: pillar
61: post file 62: jack support
63: earth plate 64: belt
65: brace 66: support angle
71: support pin 72: support plate
80: cap concrete T: backfill
P : Waste concrete

Claims (7)

CIP (C) is piled along with H-beams (H) at equal intervals on the soil wall (B), and at the same time, the basement foundation (51) is provided on the ground (J), and the basement wall (52), slab (53) and In the method of demolition of an underground building (50) having a column (54),
A through hole (53a) is drilled in the slab (53) of each basement level to be supported by the basement foundation (51) while inserting the post pile (61), and at the same time, a jack support (62) is installed between the slabs (53). A first step (S10) of installing, and
The concrete adhering to the H-beam (H) together with the removal of the slab 53, the column 54, the basement wall 52, the jack support 62, and the CIP(C) in the descending order of each basement floor. After crushing and unloading, the earth plate 63 is sandwiched between the adjacent H-beams (H) and a braided beam (65) connects the H-beam (H) together with the post pile (61) while wrapping the wale (64). ) and a second process (S20) of installing,
A third process (S30) of removing the underground foundation (51) and,
A fourth process (S40) of dismantling the support (65) and the wale (64) while performing soil backfill (T) and compaction from the basement (J) in the ascending order of each basement floor (S40);
A fifth process (S50) of drawing the post pile 61 and the H-beam (H),
The second step (S20) further includes fixing a support angle 66 between the H-beams H adjacent to each other to support the earth plate 63,
The fourth step (S40) is an underground building demolition method, characterized in that it further comprises dismantling the support angle (66) in the ascending order of each basement floor. According to claim 1,
The second step (S20) is an underground building demolition method, characterized in that it further comprises filling the waste concrete (P) between the earth plate (63) and the earth wall (B). 3. The method of claim 2,
In the second process (S20), in the descending order of each basement floor, the support pins 71 are piled in the earth wall B via the earth plate 63, and at the same time, the earth plate 63 and the earth wall B ) The underground building demolition method, characterized in that it further comprises setting a support plate (72) supporting the waste concrete (P) on the support pin (71) between the. 4. The method of claim 3,
The fourth step (S40) is an underground building demolition method, characterized in that it further comprises dismantling the support pins (71) in the ascending order of each basement floor. According to claim 1,
In the second process (S20), the support angle 66 is fixed horizontally or diagonally between the H-beams H adjacent to each other in descending order of each basement floor to support the earth plate 63. Demolition method of an underground building, characterized in that. 6. The method according to any one of claims 1 to 5,
The second process (S20) is to preform the cap concrete 80 along the upper part of the H-beam (H) exposed by the removal of the basement wall 52 and the CIP (C) of the first basement floor. including more,
The fourth step (S40) is an underground building demolition method, characterized in that it further comprises dismantling the cap concrete (80). 7. The method of claim 6,
In the second step (S20), the cap concrete (80) is a method of demolition of an underground building, characterized in that it is prepared by hardening the mortar while reinforcing the rebar in a welded state to the H-beam (H).

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