KR20210051326A - Batch down wall demolition method - Google Patents

Abstract

A conventional underground structure demolition method requires a long construction period and excessive costs to make demolition very difficult. The present invention complements the conventional demolition method and provides a method for safely tearing down a wall without a structural problem in a wall demolition method of a decrepit building. A conventional method uses a wale and a strut in a wall to descend while tearing down the interior (miscellaneous materials and others). The method removes a foundation or drills the position of a PRD, a corner pile, and a middle pile in advance by surveying. The method removes the wale and the strut and backfills while ascending. The present invention generally uses structural calculation, a verified earth retaining method, and a beam and a steel pipe strut (1,000m/m) to tear down a wall in steps of 2-3m from the ground and then install a wale and a strut and descend. The method simultaneously tears down the wall and the interior. The ground of a retaining wall is transferred when inserting a retaining plate into a newly installed retaining wall to mount an existing wall to be torn down (advantage) and install the wale and the strut on the wall. The strut is installed on each floor and then on a lower floor. The foundation is removed by using a wheel saw, a core, and a buster. A middle pile and a corner pile are installed up to the bottom by using 300×200 beams. A penetration depth (diameter of 5m) is driven downwards (a core and a small drill) by a micropile (diameter of 21.5cm) underneath the foundation.

Description

Batch descending wall demolition method {BATCH DOWN WALL DEMOLITION METHOD}

The present invention relates to the field of civil engineering, and more particularly, to a batch-down wall demolition method used to reduce cost and increase the efficiency of construction in the demolition of an underground retaining wall of an earthen barrier construction.

The following are two technologies that are the background of the collective unloading wall demolition method.

Korean Patent Publication No. 1020100101271 (2009.03.09)'Top-down underground structure demolition method' and domestic patent registration number 1007362410000 (2007.06.29)'Up-down sequential removal and sequential reclamation method for removing the underground retaining wall' structure and construction method. Is shown.

Domestic Patent Publication No. 1020100101271 (2009.03.09) The description of the construction method for the'Top-down underground structure demolition method' is as follows.

1. First, drill a hole in the slab and install the central pile and corner pile.

2. Install strips and struts inside the wall.

3. Go down to the floor while dismantling the inside of the slab.

4. Place post piles and corner piles on the foundation and drill.

5. After backfilling and compacting, the strip length and strut are repeatedly dismantled for each layer and raised to the top.

6. A civil engineering company (driving machine, drilling) drills and installs side piles, corner piles, post piles, and PRDs.

7. As civil engineering companies and demolition companies install strips and struts at the same time, the excavation of the civil engineering company and the demolition work of the demolition company interfere with each other.

Domestic Patent Registration No. 1007362410000 (2007.06.29) The explanation of the construction method for the'up-down sequential removal and sequential reclamation method for removing the underground retaining wall' is as follows.

Steps 1 to 4 of the above-described Korean Patent Publication No. 1020100101271 (2009.03.09)'Top-down underground structure demolition method' are omitted due to the same relationship.

5. When the foundation is demolished, the backfilling work and the wall dismantling are repeatedly carried out for each floor, going up to the top.

6. After drawing the file in the top bare ground condition, hand it over to a civil engineering company.

However, the two conventional demolition methods having such a configuration caused problems in the following points.

Korean Patent Publication No. 1020100101271 (2009.03.09)'Top-down underground structure demolition method' goes down while internally demolition, drills a post hole in the foundation, backfills and dismantles it, and rises to the top. After the civil engineering company drills the pile, the civil engineering company and the demolition company go down while digging and demolition of the wall, respectively. The process of going down and going up is overturned several times as it goes up while dismantling the strip and strut after throwing away. This not only lowers the efficiency of the construction, but also becomes a factor that increases the construction period.

Domestic patent registration number 1007362410000 (2007.06.29)'Upward sequential removal and sequential reclamation method for removing underground retaining walls' also goes down while internally demolition, removes the wall after basic demolition, goes up to the top, then runs backwards from the bottom to the top, and works on equipment. Will do.

As a result, both construction methods reduce the efficiency of construction and increase the construction period, which leads to excessive input costs and a decrease in construction efficiency.

Korean Patent Publication No. 1020100101271 (2009.03.09)'Top-down underground structure demolition method' Domestic patent registration number 1007362410000 (2007.06.29)'Up-down sequential removal and sequential reclamation method for removing underground retaining walls'

The present invention has been devised to solve the above problems, and provides a batch-down type wall demolition method suitable for the construction of a structure that shortens the construction period, reduces the input cost, and increases the efficiency of the construction due to ease of construction. It is for that purpose.

To reiterate the foregoing, Korean Patent Publication No. 1020100101271 (2009.03.09)'Top-down underground structure demolition method' goes down while being demolished inside, puts a post on the foundation, backfills and dismantles it, and rises to the top. After the civil engineering company drills the pile, the civil engineering company and the demolition company go down while digging and demolition of the wall, respectively. Since the strip and strut are dismantled after casting, the process of going down and up is overturned several times.

Domestic patent registration number 1007362410000 (2007.06.29)'Upward sequential removal and sequential reclamation method for removing underground retaining walls' also goes down while internally demolition, removes the wall after basic demolition, goes up to the top, then runs backwards from the bottom to the top, and works on equipment. Will do. This not only reduces the efficiency of the construction and increases the construction period, but also causes excessive input costs.

On the other hand, in the present invention, the internal demolition and the wall demolition are simultaneously performed at the beginning of the construction, so that the construction is easy and the overall process is accelerated. This leads to reduction of construction period and input cost.

Korean Patent Publication No. 1020100101271 (2009.03.09)'Top-down underground structure demolition method' will be installed by a civil engineering company and a demolition company at the same time in the latter part of the construction, respectively. At this time, the construction period is prolonged and the input cost is excessive as the excavation of the civil engineering company and the demolition work of the demolition company interfere with each other.

On the other hand, since the present invention only needs to be handed over to a civil engineering company, there is no interference between a civil engineering company and a demolition company, thereby reducing the construction period and input cost.

The present invention provides a collective lowering-type wall demolition method suitable for the construction of a structure that shortens the construction period and reduces the input cost compared to the conventional construction method, and increases the efficiency of the construction by being easy to construct.

1 is a diagram showing a batch-down type wall demolition method suitable for the demolition of an underground retaining wall in a soil barrier construction according to the present invention,
1 is an enlarged cross-sectional view of the entire cross-sectional view and AA, which is a main part.

The construction method according to the present invention and the advantages thereof will be described in detail step by step.

1. First, drill a hole in the slab and install the central pile and corner pile.

2. After removing the wall, install strips and struts on the earth wall.

In general, struts of 300×300×10×15 are used, but structural safety is provided by applying the PPS method using a steel pipe with a diameter of 800mm. In addition, the safety was improved by applying the structurally proven temporary facility earth protection method that has been used in general.

The internal demolition and the wall demolition are carried out at the same time to facilitate construction and speed up the overall process. This leads to reduction of construction period and input cost.

3. When the existing earth wall is damaged during the noiseless cracking operation, it is regenerated and descended.

4. The slabs and walls are demolished and each floor goes down from the 1st to the 6th floor.

5. Remove the basic demolition with a wheel saw, core, and buster. At this time, load the waste from time to time.

6. Ascends from 6th to 1st by dismantling the strip and strut as well as backfilling and consolidating from time to time.

7. Perform the drawing work after the top bare ground.

8. Hand over to a civil engineering company. Since it is only necessary to hand over to the civil engineering company without interference between the civil engineering company and the demolition company, the effect of shortening the construction period and reducing the input cost can be obtained.

1: STRUT
2: WALL
3: 100 TON
4: Bracket installation
5: Wall removal location (primary area: 2M)
6: Wall removal location (repeated work while going down)
7: Existing: SIDE-PILE
8: stairs
9: Foundation removal location
10: core drilling
11: Micropile installation (bar diameter: 21.5CM installation: root entry 5M) temporary installation
12: stiffener installation
13: WALL. STRUT. Jockey. Bracket: Down while repetitive work

Claims (7)

Existing subway construction method had a lot of burden in terms of cost due to excessive demolition input cost. The present invention is a batch-down wall demolition method that can reduce construction period and input cost by about 1/3 compared to the existing construction method. The other construction method only removes the slab and interior when descending from the top. The present invention is a batch-down type wall demolition method that removes all of the slabs, columns, and others as well as the wall demolition using a proven general earthen barrier method (beam, steel pipe strut: 1000M/M). In the existing construction method, when the wall is removed from the lower part to the upper part, the construction period and input cost are doubled. However, the present invention is a collective lowering-type wall demolition method in which the construction period and input cost are reduced when the wall is removed from the top to the bottom. The foundation is removed with a wheel saw, core work, and buster work, and the center pile and corner pile go through a step of reinforcing the upper part with 300×200 piles and the lower part with 21.5cm micropile. It goes through the steps of backfilling the soil from the bottom, compacting, dismantling the belt, and dismantling the struts. Finally, it goes through the step of drawing after the upper bare ground (backfill). After surveying, a civil engineering company completes the steps by drilling side piles, drilling, central pile drilling, corner pile drilling, PRD construction drilling, and digging.

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