KR20050024637A - A method of constructing for earth retaining wall system - Google Patents

Abstract

PURPOSE: A method for constructing a retaining wall of a temporary protection wall is provided to easily draw out a pile from a bore, to re-use the pile, and to prevent excavation failure in reconstruction by absorbing the water by a coating layer of liquid absorptive resin and changing the coating layer into gel. CONSTITUTION: A method for constructing a retaining wall of a temporary protection wall is composed of steps for boring the ground; forming a coating layer(2) of liquid absorptive resin on the outer surface of a pile(10) by spraying or coating the liquid absorptive resin over the upper side of the pile; inserting the pile into the bore; pouring concrete into the bore; taking out the pile from the bore after constructing a structure and curing the concrete; and pouring and curing cement milk grouting in the bore after drawing out the pile.

Description

Construction method of earth retaining wall system {A method of constructing for earth retaining wall system}

The present invention relates to a construction method of a temporary earthquake earth wall, and more particularly, a pile inserted into the earth wall of a soil cement wall (SCW) method and a cast in-placed pile (CIP) method in an excavation earthquake method. After construction is completed, the present invention relates to a construction method of a temporary earthquake earth wall that can be easily withdrawn (removed) and reused.

Temporary earthwall soil walls are widely used in civil engineering and construction sites in order to suppress soil disintegration and displacement of excavation backing during the excavation of the ground for the construction of structures.

Temporary earth wall When constructing earth wall, pile (H-Pile) is inserted into continuous wall to increase stiffness of earth wall. More specifically, the temporary earthquake earth wall is constructed mainly in close proximity to downtown, and to minimize the settlement of adjacent ground and adjacent buildings by preventing settlement of adjacent ground due to lateral displacement due to excavation and lower groundwater level. It is constructed for the purpose.

Typically, the temporary earthquake earth wall is a drilling process for drilling the destination panel for the construction of the earth wall, the process of inserting the pile into the excavated perforation, the process of pouring concrete into the excavated perforation in which the pile is inserted, and It has been constructed through a curing process.

However, in the above construction method, since the pile inserted into the earth wall cannot be drawn out after reuse of concrete curing, the construction cost increases, and the pile inserted continuously in the earth wall causes obstacles during excavation work for soil pollution and redevelopment. There were various problems.

Recently, in order to solve the above problems, a method of constructing a temporary soil wall using a pile wrapped with a release coating material such as a film has also been carried out.

Specifically, the construction method includes an excavation process for drilling a destination panel for constructing an earth wall, a process of wrapping a release coating material on a pile, and a step of inserting a file in which the release coating material is wrapped into an excavated perforation; , The process of placing concrete in the excavation drilling, the pile is inserted, the process of curing the poured concrete, the excavation process of the ground on which the structure will be constructed, the process of constructing the structure on the excavated ground, and the completion of the structure After separating the pile and the release cladding material, the process of drawing out only the file separated from the perforated into which the file is inserted, the process of pouring cement milk grouting into the insertion hole of the extracted file, and the process of curing cement milk grouting .

As described above, the construction method of temporary earthquake earthwall using piles wrapped with a release coating material can withdraw and reuse piles inserted in the perforations of destination panels after concrete curing and structure completion, thus saving city park prices and environmental pollution. However, the problem of failure in re-excavation can be solved, but the process of wrapping the release coating material on the pile is very complicated, resulting in a problem of greatly deteriorating workability.

In order to solve the above-mentioned problems, the present invention uses a mortar sprayer or the like to easily spray, apply or coat a liquid absorbent resin on a pile to form a coating layer thereof on the pile, and then, It is intended to provide a construction method of a temporary earthquake earth wall, characterized in that inserted into the perforation.

As described above, the coating layer of the liquid absorbent resin formed on the pile is changed to a gel state by absorbing moisture during the concrete curing process in the perforation of the destination panel, so that the pile can be withdrawn from the perforation after completion of the concrete curing and construction of the structure. When the file is easily separated. In addition, the present invention is to provide a construction method of a temporary earthquake earth wall construction is easy to take out and reuse the file, the city park price is low, there is no excavation obstacle when environmental pollution or reconstruction, workability is greatly improved.

In the construction method of the temporary earthquake earth wall of the present invention for achieving the above problems, a step of inserting a pile in the perforation after drilling the destination panel for reinforcing the ground, the step of placing concrete in the perforation, pouring After the curing of the finished concrete and the construction of the structure is completed, the process of drawing out the pile from the perforation, and the process of pouring cement milk grouting to the perforated with the pile, and then curing the temporary soil wall in the construction of the target panel. It is characterized in that the coating layer 2 of the liquid absorbent resin is formed on the outer surface of the file 10 by spraying, applying or coating the liquid absorbent resin on the file 10 before inserting the pile 10. .

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

Figure 3 is a block diagram showing the construction step of the temporary earthenware earth wall in accordance with the present invention. Hereinafter, the construction method of the temporary soil wall earth wall according to the present invention will be described in detail for each construction step described in the block diagram of FIG.

First, in the present invention, as shown in FIG. 5, the destination panel for constructing the earth wall is excavated to form perforations. On the other hand, by spraying, applying or coating the liquid absorbent resin on the pile using a mortar injector or the like to form the coating layer 2 of the liquid absorbent resin on the pile as shown in Figs. As a result, the present invention greatly improves the workability of the pile forming process compared to the conventional construction method.

FIG. 1 is a perspective view showing the pile 10 and the coating layer 2 of the liquid absorbent resin formed on the pile 10, and FIG. 2 is a view showing the pile formed on the outer surface of the coating layer 2 of the liquid absorbent resin. Fig. 4 is a perspective view of a pile in which the coating layer 2 of the liquid absorbent resin is formed on the outer surface.

The present invention is characterized in that the coating layer 2 of the liquid absorbent resin is formed on the outer surface of the pile 10 by spraying, applying or coating the liquid absorbent resin on the pile 10 as described above.

The absorbent resin in the liquid absorbent resin used in the present invention is a polyacrylic acid partial neutralization crosslinking agent, a hydrolyzate of starch-acrylonitrile graft polymer, a neutralized product of starch-acrylic acid graft polymer, and a neutralized product of vinyl acetate acrylic ester copolymer. And hydrolyzate of acrylonitrile copolymer or hydrolyzate of acrylamide copolymer.

The liquid absorbent resin used in the present invention is a liquid substance in which the above absorbent resin is mixed with a solvent and the like, and more specifically, the liquid absorbent resin composition disclosed in Korean Patent Application No. 2003-60700 (Applicant: Kangbongseo ) It is most desirable. Therefore, the present invention is a use invention based on the Republic of Korea Patent Application No. 2003-60700 .

Next, as shown in FIG. 6, the file having the coating layer 2 of the liquid absorbent resin formed thereon is inserted into the perforation excavated in the destination panel, and then the file is inserted as shown in FIG. Place concrete in the perforations.

Next, curing the poured concrete as shown in Figure 8 to complete the earth wall (11). The poured concrete is sufficiently evenly pressed on the outer circumferential surface of the pile 10 on which the coating layer 2 is formed, except for the pile 10 and the coating layer 2 of the liquid absorbent resin.

At this time, the coating layer (2) of the liquid absorbent resin formed on the outer surface of the pile inserted into the excavation perforation absorbs moisture and deforms onto a gel to expand 2-20 times the original thickness, thereby expanding the pile ( 10) and the coating layer 2 is in a state of being easily separated from each other.

Next, when the earth wall 11 in the state in which the pile 10 is inserted as described above is completed, as shown in FIG. 9, the destination panel is excavated as in the known construction method, and the foundation floor is formed on the excavated ground. Construct the structure.

Next, after the concrete curing and construction of the structure is completed as described above, withdrawal of the pile 10 inserted in the perforation of the destination panel using a separate hydraulic jack, as shown in Figure 10, and after the withdrawal shown in Figure 11 As shown in FIG. 12, the cement milk grout is poured into the perforated to which the pile is drawn, thereby completing the construction of the earth wall 11 as illustrated in FIG. 12.

As described above, since the coating layer 2 of the liquid absorbent resin, which is formed on the outer surface of the pile during the concrete curing process, absorbs moisture and is deformed and expanded onto a gel, the present invention provides The file 10 inserted in the perforation can be easily withdrawn and reused. Therefore, the present invention is inexpensive construction cost, it is possible to prevent environmental pollution, it can prevent the excavation failure during reconstruction.

The present invention can simplify the process of forming a file that can be easily pulled out, greatly improving workability, and at the same time, extracting and reusing expensive files while maintaining the rigidity of the earth wall. Therefore, the present invention can reduce the construction cost, prevent environmental pollution, and can solve the problem of obstacles during excavation due to redevelopment.

1 is a perspective view showing a separation of the pile 10 and the coating layer 2 of the liquid absorbent resin formed on the pile.

Figure 2 is a side cross-sectional view of the pile formed with the coating layer of the liquid absorbent resin

Figure 3 is a block diagram showing the construction stage of the temporary earthquake earth wall in accordance with the present invention

Figure 4 is a perspective view of the pile formed with the coating layer of the liquid absorbent resin

Figure 5 is a schematic diagram of the drilling process for forming the insertion hole in the destination panel

Figure 6 is a schematic diagram of the process of inserting the file formed with the coating layer of the liquid absorbent resin in the insertion hole drilled in the destination panel

Figure 7 is a schematic diagram of the process of pouring concrete in the insertion hole (puncture) in which the pile is formed a coating layer of the liquid absorbent resin

Figure 8 is a schematic diagram of the process of the concrete is nurtured around the pile formed with the coating layer of the liquid absorbent resin

9 is a process diagram for constructing a structure in a state in which an earth wall is formed

10 is a schematic view of the process of withdrawing a pile from the cured concrete

FIG. 11 is a process schematic diagram of pouring cement milk grouting into an insertion hole (puncture) from which a pile is drawn; FIG.

12 is a perspective view of a completed temporary earthenware earth wall

※ Explanation of main parts in drawings

1: Interface between the coating layer of the liquid absorbent resin and the pile

2: coating layer of liquid absorbent resin

10 file 11 earth wall 12 ground

Claims (2)

Inserting a pile into the perforation after drilling the destination board to reinforce the ground, the process of placing concrete in the perforation, the curing of the poured concrete and the construction of the structure after the completion of the pile to withdraw the pile from the perforation In the process of installing cement milk grouting on the perforated process and pile, and then curing the temporary soil wall, the liquid absorbent resin on the pile 10 before inserting the pile 10 into the perforation of the destination panel. A method of constructing a temporary earth-walled earth wall, comprising spraying, applying or coating to form a coating layer (2) of the liquid absorbent resin on the outer surface of the pile (10). The method of claim 1, wherein the absorbent resin in the liquid absorbent resin is a polyacrylic acid partial neutralization crosslinking agent, a hydrolyzate of starch-acrylonitrile graft polymer, a neutralization of starch-acrylic acid graft polymer, a neutralization of vinyl acetate acrylic ester copolymer And a hydrolyzate of an acrylamide copolymer or a hydrolyzate of an acrylamide copolymer.