KR20060023245A - Method for constructing basement land-side protection wall in civil engineering - Google Patents

Abstract

The present invention provides a construction method for underground earthen wall for civil engineering for constructing the earth wall used for the purpose of supporting external forces such as earth pressure. The underground construction wall construction method for civil works is provided with a plurality of foundation piles which are spaced and successively typed between the excavation ground and adjacent ground, and removes the soil between the spaced and successive foundation piles and fills the expandable resin. The base piles are connected by an expandable resin block formed by the filling of the expandable resin, so that the trench ground is excavated after the expandable resin block is expanded and cured.

Description

Construction method for underground mud wall for civil engineering {METHOD FOR CONSTRUCTING BASEMENT LAND-SIDE PROTECTION WALL IN CIVIL ENGINEERING}

1 is a flow chart for explaining an example of the construction method for underground mud wall construction for civil engineering according to a preferred embodiment of the present invention;

Figure 2a and 2b is a view for the soil wall after the earthquake wall formed by the construction method for underground earthquake wall construction method for civil works and after the construction of the earthquake wall;

3A to 3C are views conceptually shown to explain the action of the expandable resin block formed by the underground construction wall construction method for civil engineering according to the present invention over time;

Figure 4 is a view for explaining an example of filling the expandable resin while substituting soil in the construction method for earthwork underground wall construction for civil engineering according to the present invention;

5a to 5e is a view for explaining an example of filling the expandable resin in the earth and sand in the underground construction wall construction method for civil works according to the present invention;

6A and 6 are views for explaining another example of the injection rod applied to the construction method for underground mud walls according to the present invention.

Explanation of symbols on the main parts of the drawings

10: H beam 20: expandable resin block

40: rod insertion hole 50: injection rod

52: injection tube 54: injection tube

56: injection hole

The present invention relates to a method for constructing underground mud walls for civil engineering, and more particularly, to a method for constructing underground mud walls for civil engineering for constructing mud walls used for supporting external forces such as earth pressure before digging.

When the ground, cut, excavation, etc. are carried out, the slope is generally maintained to maintain the stability of the ground.However, when the excavation is carried out to secure the utilization of the land more effectively or to construct the foundation of the structure and the basement of the building in the city. Normally, vertical excavation is performed. Therefore, in order to prevent the collapse of the adjacent ground due to vertical excavation, the wall must be installed around the vertical surface. The wall construction method for installing the wall is based on the soil condition, the land condition, the impact on the site, construction cost, air and Workability, etc. should be taken into consideration and the characteristics of each construction method should be carefully selected.

At the present time, various earthquake methods have been proposed and applied to construct the earthquake wall. There are various kinds of these clogging methods according to the classification method, but generally used clogging methods include H-pile and earth plate method, CIP wall method and underground wall method. Is proposed. Here, H pile and earth plate method is a method of installing H. pile at regular intervals and digging the earth plate with the earth plate sandwiched at the same time. The construction is relatively simple, economical, and short in air. In addition, the CIP wall method is a method of using a pile wall with a diameter of about 400mm continuously to be used as an earthen wall, and has the advantage of minimizing the displacement of adjacent ground which may occur in H pile and earth plate method. The underground continuous wall construction method uses a stabilizer to prevent ground collapse while excavating, placing reinforcing steel bars in the ground, and placing concrete concrete walls in a continuous manner. It is possible to construct close to adjacent buildings due to its low impact, and can be used as a permanent wall due to high rigidity of the wall, high degree of orderability, and can be constructed regardless of soil conditions.

However, these clamshell methods each have advantages and disadvantages. In other words, H pile and earth plate methods require a short time gap in the construction method before backfilling after excavation, so that countermeasures against earth plate backfilling are required. There is a problem that causes the ground to sink. In addition, the CIP wall construction method can create gaps between bulbs and bulbs due to the vertical excavation method, so the bulbs are zigzag in order to secure the ordering effect, resulting in excessive waste of construction costs, large equipment input, and the ground of construction sites. In this weak case, the entry of equipment is difficult and is limited to the size of the construction site and the state of the site soil. In addition, the underground continuous wall is not possible to be installed in the front floor, there is a problem that leaks easily occur at the connection portion of the member.

As described above, H-pile and earth plate method among the conventional earthquake methods, in particular, the time difference between the construction of the earth wall wall (for the earth plate method, it will be about 1 to 2 days without a structure supporting the ground immediately). As a result, there is a problem in that soil sedimentation is aggravated during the installation of temporary facilities, which increases the ground subsidence.

Therefore, the present invention not only effectively eliminates the causes of ground subsidence in order to satisfy the demand for the recent earthen construction method, but also consolidates and strengthens adjacent ground, thereby providing a new type of civil engineering that can overcome the main problems of existing earthen construction methods. To provide a method of constructing underground retaining walls.

According to a feature of the present invention for achieving the above object, the present invention provides a construction method for underground mud walls for civil engineering for construction of mud walls used for supporting external forces such as earth pressure. The underground construction wall construction method for civil works comprises the steps of: installing a plurality of foundation piles spaced and successively type between the trench ground and the adjacent ground; Removing the soil between the spaced and successively typed foundation piles and filling the expandable resin so as to be connected between the expandable resin blocks formed by the filling of the expandable resin between both foundation piles; Digging the trench ground after the expandable resin block is expanded and cured.

Forming the expandable resin block in the underground construction wall construction method for civil engineering according to the present invention is to fill the expandable resin while replacing the earth and sand between the spaced and successive foundation pile to form the expandable resin block can do.

The forming of the expandable resin block in the underground construction wall construction method for civil engineering according to the present invention is to fill the expandable resin in the ground soil between the spaced and successively typed foundation pile to form the expandable resin block. Can be.

The step of forming the expandable resin block in the underground construction wall construction method for civil works according to the present invention comprises the steps of forming a rod insertion hole by vertically perforated in the ground between the spaced and successively typed base pile; Inserting the injection rod of the injection equipment for injecting the expandable resin up to the bottom of the rod insertion hole and injecting the expandable resin in the direction of the base pile on both sides; Continuously spraying the expandable resin while raising the spray rod to the ground step by step to fill the expandable resin so as to connect between the base pile on both sides. The forming of the rod insertion hole in the underground construction wall construction method for civil works according to the present invention may be such that the depth of the rod insertion hole is formed to have a depth corresponding to the type depth of the foundation piles on both sides. Filling the expandable resin in the underground construction wall construction method for civil engineering according to the present invention is the base pile of the both sides by angular movement in the direction perpendicular to the spraying direction of the expandable resin injecting the expandable resin It is possible to increase or decrease the width of the expandable resin filled to connect between.

In addition, the method of filling the expandable resin between the foundation piles in the underground construction wall construction method for civil engineering according to the present invention, as shown in Figure 4, cutting / cutting the ground between the foundation piles 10 by a mechanical method It is possible to fill the expandable resin, or to fill the expandable resin while replacing the mechanical cutting / cutting at the same time.

The construction method of the retaining wall according to the present invention is to form an expandable resin block in underground soil between the foundation piles such as H-beams. According to the present invention, the construction method of the retaining wall according to the present invention installs a plurality of foundation piles spaced and successively typed between the trench ground and the adjacent ground, and removes the soil between the spaced and successively piled foundation piles and fills the expandable resin with both sides. The earthwork wall is constructed by excavating the trench ground after the expandable resin block is expanded and cured by connecting the expandable resin blocks formed by the filling of the expandable resin. In the present invention, the formation of the expandable resin block is a method of filling the expandable resin to form an expandable resin block while shaving the ground between the spaced and successively typed foundation piles, and the ground soil between the spaced and successive foundation piles. There is a method in which the expandable resin is supplied while being substituted with the earth and sand to form the expandable resin block. That is, the method of filling the expandable resin between the foundation piles is to fill / expand the expanded resin by mechanically cutting the ground between the foundation piles, or to fill the expandable resin while replacing the mechanical cutting / cutting at the same time, or the square jet method. It can be filled with expandable resin in the ground by high pressure spraying with spray equipment applied to (SQJ; SQuare Jet).

Therefore, the method of removing the ground between the foundation pile in the present invention can be applied to various mechanical devices in addition to the general excavator, and devices that can fill the expandable resin in the ground, such as injection equipment can be applied. Also, in the method of filling the expandable resin, there is a method of filling the expandable resin in the portion to be removed after removing the ground between the foundation piles, and there is a method of filling the expandable resin while stirring the ground and the expandable resin of the foundation pile yarns. There is a method of filling the expandable resin while removing the ground from the ground with equipment.

As described above, the underground construction wall construction method for civil works according to the present invention, as shown in Figures 3a to 3c, prevents soil sediment movement of the ground adjacent to the excavation, and in addition, ground consolidation due to the expansion pressure of the resin Due to the effect has a unique effect of strengthening the adjacent ground more than the existing state. In addition, the construction equipment is compact and lightweight, and it is relatively easy to install on an uninterrupted site or soft ground. In addition, construction is possible where there are obstacles in the downtown area, the lower part of the structure, or close to other buildings. The construction shape and size can be adjusted freely, the construction period can be shortened, and the overall civil and construction cost can be reduced. Since the present invention is excellent in underground excavation and exponential performance, it can be very usefully applied to underground development of deep depth, such as LNG storage, underground storage facilities, large-scale redevelopment of urban areas recently.

As described above, the present invention is characterized by providing a new method of constructing a retaining wall by applying an expansive resin, an excavation, cutting, cutting and spraying device, and an expandable resin. For example, in Korean Patent Laid-Open Publication No. 2000-0076951 "Ground improvement composition method and ground improvement composition device", etc., the underground composition is formed by inserting an injection tube into the target ground and spraying the hardened material at high pressure to mix the hardened material in the ground. Soil improvement method and composition apparatus are proposed. In particular, the composition device (herein referred to as the injection device in the present invention) proposed here is required to be somewhat improved as in the preferred embodiment of the present invention described later, but can be usefully applied to the present invention as a whole. Korean Patent Laid-Open Publication No. 2000-0057359, "Method for increasing the bearing capacity of basic soil for building," etc., restricts a method for securing the stability of a building by appropriately treating the basic soil in order to increase the bearing capacity. In particular, the method proposed here proposes to increase the bearing capacity of the soil by injecting the expandable resin by inserting the injection tube into the holes formed in the soil, such an expandable resin can be usefully applied to the present invention. As the expandable resin used in the present invention, independent foamed polyurethane foams composed of a mixture of expandable polyurethane foams as proposed in the above Patent Publication No. 2000-0057359 may be mainly applied. Application will be able to control the expansion rate and curing time.

On the other hand, the present invention is applied to the mechanical excavation equipment and injection equipment and expandable resin for the excavation of the ground proposed in various ways. However, while the prior art is applied to the purpose of simply increasing the bearing capacity of the ground, the present invention has the biggest difference in that the purpose of the construction of the earth wall in the civil engineering of buildings. In addition, the present invention has the biggest difference in that the expandable resin is connected between the foundation piles that are typed on the boundary surface to form the retaining wall of the new type expandable resin block that can replace the conventional retaining wall.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 6B. Meanwhile, the drawings and detailed descriptions of configurations and operations and effects thereof that can be easily understood from the general soil barrier construction method and related technologies applied to the present invention are briefly or omitted, and the parts related to the present invention are illustrated.

Figure 1 is a flow chart for explaining an example of the construction method for underground construction mud walls according to a preferred embodiment of the present invention, Figure 2a and Figure 2b is a mud wall formed by the construction method for underground mud walls according to the present invention And after the construction of the wall is a drawing for a state that is exploded, Figures 3a to 3c is conceptual for explaining the action over time of the expandable resin block formed by the construction method for underground earth walls for civil engineering according to the present invention 4 is a view for explaining an example of filling the expandable resin while substituting soil in the construction method for earthwork underground wall construction for civil engineering according to the present invention, Figures 5a to 5e is for civil engineering underground Figures for explaining an example of filling the expandable resin in the earth and sand in the soil wall construction method, Figure 6a and 6 is a view for explaining another example of the injection rod applied to the underground construction wall construction method for civil works according to the present invention.

1 to 5e, the construction method for underground construction wall for civil engineering use according to an embodiment of the present invention for constructing the earth wall used for the purpose of supporting external force, such as earth pressure is the construction ground (demolition ground) first designated according to the design ) And a plurality of foundation files by civil design on the boundary surface of the adjacent ground (S500). At this time, in the soil wall construction method of the preferred embodiment of the present invention, as shown in Figures 2a and 2b, the H-beam 10 is applied to the foundation pile. The number and spacing of the H-beams 10 are set according to building grounds, adjacent grounds, terrain, and the like, and are generally typed and installed at uniform intervals.

After the type of the H beam 10 as the foundation pile is completed on the building boundary as described above, as shown in FIGS. 5A and 5B, the H resin beam 10 is connected to the expanded resin block 20 connecting the H beams 10. To illustrate an example for forming in the earth and sand between the), first to drill the rod insertion hole 40 for inserting the injection rod 50 of the injection device for filling the expansion resin (S510). The rod insertion hole 40 is preferably formed to be slightly larger than the outer diameter of the injection rod 50, the depth of the H-beams on both sides by making the depth is the same or slightly deeper than the type depth of the H-beams 10 on both sides Since the expanded resin block 20 which connects the entirety between 10 is itself rigid in flexural rigidity, reinforcing bars are not necessary, and it can also serve as an index wall at the same time. Of course, the depth of the rod insertion hole 40 may be elastically adjusted according to the type of ground.

Next, as shown in Figure 5b by inserting the injection rod 50 of the injection equipment for injecting the expandable resin up to the bottom of the rod insertion hole 40 by injecting the expandable resin in the direction of the H-beam 10 on both sides (S520) It is sprayed horizontally to form a plate-shaped wall in the ground. As shown in FIG. 5C, the inflating resin is continuously injected to the ground while raising the injection rod 50 step by step to be connected to and filled with the H beams 10 on both sides thereof. 20 to be formed (S530). The right side of each figure shows the side state.

On the other hand, in the preferred embodiment of the present invention, the injection rod 50 of the injection equipment, as shown in Figure 6a and 6b, to have an injection pipe 54 formed with the injection pipe 52 and the injection port 56. Such a configuration generally requires only 90 degrees of ejection direction so as to inject the high-pressure jet equipment horizontally. In other words, since the construction method of the mud wall according to the present invention is to form the mud wall of the expandable resin block 20 connecting between the type H beams 10, the injection hole 56 is positioned in both H beams 10 directions. This is because the expandable resin needs to be sprayed stably.

The expandable resin block 20 formed by the expandable resin filled in this way has a different curing time according to its components, but generally hardens in a few hours to several minutes. The excavation process is to proceed (S540). In this case, as shown in FIG. 3A, the expandable resin block 20 initially filled in the soil between the two H beams 10 expands over time as shown in FIGS. 3B and 3C to exert a compressive force in the surrounding ground direction. The consolidation section of about 1m is formed, and the adjacent ground is further strengthened due to the ground consolidation effect by the expansion force. Such a method is most distinguished from the conventional temporary scaffolding construction method. The present invention is to consolidate adjacent ground by directly consolidating the adjacent ground without damaging or damaging the adjacent ground.

As described above, the underground construction wall construction method for civil works according to the present invention can be carried out by filling the expandable resin while simultaneously removing soil by the injection force of the injector in the ground between the etching beams 10 using the injector. As shown in FIG. 4, a method of introducing an expandable resin while removing (cutting) the ground by a mechanical method may be applied. That is, as shown in Figure 4 using the cutting device configured in the form of a saw blade cutting the soil between the two H-beams 10 while discharging the expandable resin to the part cut by the cutting device to form an expandable resin block will be.

As described above, although the construction method for underground construction walls for civil engineering according to the preferred embodiment of the present invention has been shown in accordance with the above description and drawings, this is only for example and within the scope not departing from the technical spirit of the present invention. It will be appreciated by those skilled in the art that various changes and modifications are possible.

According to the construction method for underground mud wall for civil engineering according to the present invention, since the mud wall is constructed by applying a ground removing device or spraying equipment and an expandable resin applied to the construction and civil engineering fields, the adjacent ground is rather strengthened and thus the adjacent construction site of the conventional construction site. The problem of ground weakness caused by the movement of adjacent ground soils due to the construction of temporary facilities that caused cracks is eliminated at the source. Particularly, the earthquake wall constructed by the construction method according to the present invention is directly filled with the expandable resin, and the adjacent earth is reinforced by the expansion pressure of the expandable resin, and the adjacent earth is formed by the earthquake wall formed of the expandable resin block. Since the support and the waterproofing are made, the construction speed of the entire civil works is not only fast, but also has the advantage of minimizing noise during construction. In addition, the construction equipment is smaller and lighter than the conventional construction method of the retaining wall, and the construction is relatively easy on the uninterrupted site or the soft ground. In addition, it is excellent in exponential performance while minimizing noise and vibration, and it is possible to construct a retaining wall relatively short even in short air, and thus it is possible to expect an effect of improving the workability and improving economic efficiency.

Claims (4)

In the underground construction wall construction method for civil engineering for construction of the earth wall used to support external forces such as earth pressure, Installing a plurality of foundation piles spaced and successively typed between the trench ground and the adjacent ground; Removing the soil between the spaced and successively typed foundation piles and filling the expandable resin so as to be connected between the expandable resin blocks formed by the filling of the expandable resin between both foundation piles; And digging the trench ground after the expandable resin block is expanded and cured. The method of claim 1, The forming of the expandable resin block may include filling the expandable resin to form the expandable resin block while replacing the earth and sand between the spaced and successive types of the foundation piles. The method of claim 1, The forming of the expandable resin block may include filling the expandable resin in the ground soil between the spaced and successive foundation piles so that the expandable resin block is formed. The method of claim 3, wherein The forming of the expandable resin block may include: forming a rod insertion hole by vertically drilling the ground between the spaced and successively typed foundation piles; Inserting the injection rod of the injection equipment for injecting the expandable resin up to the bottom of the rod insertion hole and injecting the expandable resin in the direction of the base pile on both sides; Comprising the step of raising the injection rod to the ground step by continuously injecting the expandable resin filling the expandable resin so as to connect between the foundation piles on both sides.

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