KR101630063B1 - Method for constructing light weight reinforced earth wall panel - Google Patents

Abstract

The present invention uses a backfill material of a reinforced earth retaining wall panel as a lightweight reinforced soil mixed with a solidifying agent and a foaming agent in a field collected soil, so that it is possible to construct a retaining wall without a separate foundation treatment on the ground, and the weight of the backfill is light (S10) of installing a foundation, which is less likely to sink, and which can reduce the material cost and the distribution cost when constructing a retaining wall by using a small field-collected soil. A step (S20) of constructing a single stage panel on an installed foundation; Connecting a band-shaped fiber reinforcement to a rear portion of the first panel and laying a band-shaped fiber reinforcement on the backfill space (S30); (S40) of placing the lightweight reinforced soil mixed with the field collected soil, the solidifying agent and the foaming agent together with water in the backfill space at a height at which the band-shaped fiber reinforcement can be buried (S40), and a step (Step S50) of placing the light-weight reinforcing soil at a height at which the band-shaped fiber reinforcing material can be embedded again after connecting the band-shaped fiber reinforcing material to the belt-like fiber reinforcing material, and repeating the step S50 a plurality of times The retaining wall is constructed with height.

Description

METHOD FOR CONSTRUCTING LIGHT WEIGHT REINFORCED EARTH WALL PANEL [0002]

In the present invention, since the backfill material of the reinforced earth retaining wall panel is lightly reinforced by mixing the solidifying agent and the foaming agent in the field collected soil, it is possible to construct the retaining wall without using any foundation or reinforcement treatment in general ground as well as soft ground , The light weight of the backfill material is low and there is little concern about the subsidence of the ground, and the use of a small field-collected soil as the backfill material of the non-Masato soil is used as a backfill material for lightweight reinforcement soil And a method of constructing a retaining wall panel.

BACKGROUND ART [0002] Generally, a reinforced earth retaining wall is disclosed in a block reinforced retaining wall, a panel retaining wall, and a reinforced earth retaining wall in which a block and a panel are compromised, and a technique for constructing the retaining wall is variously known .

Of these, block prefabricated blocks use relatively small dry or wet molded blocks, and most of the stiffeners use geogrid (net stiffener). Since the block-type reinforced earth retaining wall uses a small-sized block, it has a merit of being very easy to construct a curved portion due to its small radius of rotation, but it is also excellent in aesthetic appearance. However, the frictional resistance caused by a load of a block, Therefore, when settlement or vertical vibration occurs, a frictional force between the block and the geogrid or between the block and the block disappears, and a collapse shear failure phenomenon occurs.

On the other hand, in the conventional panel and block-shaft reinforced earth retaining walls, when a backing material such as a martho or the like having a predetermined particle size or the like is used in the selection of the backing material, the reinforcing material to be embedded in the reinforcing material and the required frictional force are generated. Etc., it is necessary to transport the marsh soil and the rubble in another place. As a result, not only the material cost and the logistics cost are excessively increased, but also a considerable cost There is a problem in that the air is also extended so much that the overall construction cost rises.

Also, in the case where the ground of the site where the reinforced earth retaining wall is applied is soft ground, there is a fear that the ground settlement occurs due to the load applied to the soft ground when the reinforcing soil is buried and compacted, There is a problem that the construction cost must be excessively consumed because various kinds of construction methods for reinforcement should be applied and basic treatment should be performed.

Korean Registered Patent No. 10-0577983 (2006.05.02. Registered) Title of invention: Compensatory reinforced earth retaining wall structure Korean Registered Patent No. 10-0803788 (Registered Feb. 2, 2008) Title of invention: Block for building a retaining wall Korean Registered Patent No. 10-0674366 (Registered on Mar. 19, 2007) Name of invention: Block for building prefabricated earth retaining wall

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a backfill material which can be used as a backfill material in the field of reinforced earth retaining walls, The present invention provides a method of constructing a lightweight reinforced concrete retaining wall panel which is less susceptible to settlement and does not require pretreatment for reinforcement of soft grounds,

According to an aspect of the present invention, there is provided a method of constructing a reinforced earth retaining wall, A one-stage panel building step in which the concrete panel is installed as a temporary strut so as to be adjacent to the installed base horizontally and is fixed to be supported by a temporary fixing clamp between adjacent panels; Connecting a band-shaped fiber reinforcement member to a rear portion of the first-stage panel, and laying a band-shaped fiber reinforcement member on the backfeed space; Placing a liquid lightweight reinforced soil obtained by mixing the field collected soil, a solidifying agent and a foaming agent together with water in the backfill space at a height at which a band-shaped fiber reinforcing material can be embedded; A second stage panel is formed on the first stage panel, the front end of the band-shaped fiber reinforcing material is connected to the panel, and then the lightweight reinforcing soil is placed on the lightweight reinforcing soil again to cure the lightweight reinforcing soil to a height at which the band- The present invention provides a method of constructing a lightweight reinforced earth retaining wall panel with a desired height by repeating the lamination of the panels and the placement of the band-shaped fiber reinforcement and the liquid lightweight reinforcing soil.

According to the construction method of the present invention, since the reinforced soil is light in weight and the field collected soil can be used as it is, there is less fear of subsidence of the ground due to the load of the reinforced soil in the construction of the reinforced earth retaining wall in soft ground such as landfill, It is possible to use it as a reinforced soil by mixing the field soil with the solidifying agent and the foaming agent and water without bringing it in another place. Therefore, it is possible to reduce the logistics cost and the construction cost for the construction of the reinforced earth retaining wall have.

1 is a flow chart showing a process of a method for constructing a reinforced earth retaining wall according to the present invention,
Fig. 2 is a perspective view showing the foundation installation and the one-stage panel construction,
Fig. 3 is an enlarged view of part A of Fig. 2,
Fig. 4 is a rear perspective view of a retaining wall showing a state in which a band-shaped fiber reinforcing material is laid and a lightweight reinforcing soil is laid,
5 is an enlarged view of a portion B in Fig. 4,
6 is an enlarged view showing the caulking between the panels and the anchoring state of the panel and the fiber reinforcement,
7 is a side cross-sectional view showing a state in which a lightweight reinforced soil is put in a secondary position,
8 is a perspective view showing a state in which a panel is formed at a predetermined height.

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

FIG. 1 is a view illustrating a process of constructing a lightweight reinforced earth retaining wall panel according to the present invention. FIG. 1 is a perspective view of a method of constructing a lightweight reinforced earth retaining wall panel according to an embodiment of the present invention. A first panel mounting (building) step (S20) of setting a concrete panel as a temporary strut so as to adjoin the installed base horizontally and fixing it to be supported by temporary fixing clamps between adjacent panels; (S30) connecting the tip of the band-shaped fiber reinforcement to the rear of the first panel and laying the band-shaped fiber reinforcement on the backfill space; A step S40 of placing the liquid lightweight reinforcing soil obtained by mixing the field picking soil, the solidifying agent and the foaming agent together with water in the backfill space at a height at which the band-shaped fiber reinforcing material can be embedded; (S50) a second stage panel on the first stage panel, connecting the strip type fiber reinforcement to the second stage panel, and then pouring the liquid lightweight reinforcing soil to a height at which the strip type fiber reinforcement can be embedded, The step (S50) is repeated several times to several tens of times to construct a lightweight reinforced earth retaining wall panel with a required height.

The method of constructing a reinforced earth retaining wall panel according to the present embodiment can shorten the air, construct the retaining wall panel on the soft ground, and utilize the field collecting soil by combining the general retaining wall panel construction method and the lightweight mixed soil construction method, Hereinafter, each step will be described in detail with reference to the drawings.

2 and 3 schematically show the steps (S10 and S20) in the state in which a single-stage panel is built on the base of the foundation and the bases 100 are formed on the line on which the retaining wall panel is formed, Curvilinear curvature radius, etc., installation is made by installing on-site concrete or by forming foundations or various bases.

The installation step S10 of the base 100 is the same as the construction process of the foundations for building a conventional reinforced earth retaining wall panel, so a detailed description thereof will be omitted.

As shown in the figure, the concrete panels 200 and 200 'are temporarily installed on the foundation 100 so as to be laterally adjacent to each other. However, the concrete panels 200 and 200' The half-shaped panel 200 'having a half-height in height as shown in FIG. 2 and the general type of warm panel 200 are alternately formed in left and right.

The first and second panels 200 and 200 'may be vertically and laterally fixed using a temporary strut 110 and may be connected to a temporary fixing clamp 120 between adjacent panels 200 and 200' Fixed.

The temporary strut 110 and the temporary fixing clamp 120 are used until the curing of the liquid lightweight reinforced soil is laid in the rear of the first panel 200 or 200 'until curing is completed. After that, the temporary strut 110 and the temporary fixing clamp 120 are embedded in the demolded or lightweight reinforced soil do.

The provisional fixing clamp 120 is detachable so that it is disassembled from the single-stage panel to temporarily fix the double-stage panel after the construction of the single-stage panel and the installation of the reinforcing material and the placement of the reinforcing soil are completed and sufficiently cured. And this reuse is repeated according to the sequential construction of the panel.

4, the stiffener insertion groove 210 of the lower portion of the panels 200 and 200 'is formed on the ground G behind the first panel 200 and 200' The front end 310 of the band-shaped fiber reinforcement 300 is connected to the rear of the first panel 200 or 200 'and the band-shaped fiber reinforcement 300 200) is placed on the ground surface of the backfeed space by a predetermined width (S30).

As shown in the figure, the longitudinal length of the band-shaped fiber reinforcement 200 in the step S30 may be extended over the entire width of the backfeed space. However, in this embodiment, the liquid lightweight reinforcing material is hardened, Therefore, it is possible to shorten the length before and after the staple fiber reinforcement, which is advantageous in that the required length of the staple fiber reinforcement can be minimized.

5, a horizontal gap between the base 100 and the first panel 200, 200 'and a vertical gap between the first panel 200, 200' adjacent to the left and right of the panel 100 200, 200 '), a caulking operation using a caulking material 130 and a sheet for waterproofing nonwoven fabric 140 are installed to prevent leakage to the front.

In this embodiment, the front end portion 310 of the band-shaped fiber reinforcing member 200 is fitted into the stiffener insertion groove 210 formed on the back surface of the panels 200 and 200 ', and the connection pin insertion groove 220 is formed vertically The connection pin 230 is inserted into the connection pin insertion groove 220 so that the tip of the band-shaped fiber reinforcement 300 is anchored to the panels 200 and 200 ', and the rear end 320 of the band- Is formed so as to have an arcuate shape in a state of standing at a full width so as to form a passive resistance portion.

The panels 200 and 200 'used in this embodiment have a front surface exposed to the outside, a rear surface tangent to the reinforcing soil, left and right side surfaces having a concave-convex coupling portion for coupling between the left and right adjacent panels, A reinforcing material insertion groove 210 is formed on the upper and lower sides of the rear surface, as seen in an enlarged view of FIG. 6, A connecting pin insertion groove 220 communicating with and intersecting with the stiffener insertion groove 210 is formed in the upper portion of the stiffener insertion groove 210 so that the front end portion 310 of the stiffener 300 is inserted into the stiffener insertion hole 210, Type fiber reinforcing member 300 can be connected to the panel 200 or 200 'by inserting the connecting pin 230 into the connecting pin inserting groove 220.

In the embodiment shown in the drawings, the band-shaped fiber stiffeners 300 are laid in a zigzag state continuously in the left and right direction. However, the present invention is not limited to this and the band- Of course.

In the present embodiment, the band-shaped fiber reinforcing material 300 is embedded in the liquid (slurry) lightweight reinforcing material 400 as will be described later. The liquid lightweight reinforcing material 400 may have a thickness of about 1 day As a result, the band-shaped fiber reinforcing material 300 is fixed to the inside of the lightweight reinforcing material 400 without being slid, thereby preventing conduction of the panels 200 and 200 ' It is also possible to effectively prevent the panel from being conducted due to the earth pressure applied when the liquid lightweight reinforcing soil is poured, by also serving as a support for supporting the side pressure applied to the upper panel 200.

4, the reinforcing material insertion groove 210 and the connection pin insertion groove 220 are formed on the rear surface of the panels 200 and 200 'used in the present embodiment, and the liquid lightweight reinforcing material 400 is inserted The lightweight reinforcing soil flows into the inside of the reinforcing material insertion groove 210 and the connection pin insertion groove 220 and hardens so that the panels 200 and 200 'and the lightweight reinforcing material 400 are integrated with each other, It is possible to effectively withstand the side pressure that the panel receives when piling.

FIG. 7 is a cross-sectional view of a state in which the liquid lightweight reinforcing material 400 is laid. The following description of the placement and curing step S40 of the lightweight reinforcing material will be given below.

The lightweight reinforced soil 400 is prepared by mixing a solidifying agent and a foaming agent together with water into a liquid phase and then pouring it into a predetermined thickness so as to reduce the earth pressure and the load, It has a merit that the safety can be improved by exerting a high strength compared with the compaction soil of the body, and the fluidity is excellent and the compaction work is not necessary and the construction is simple.

In addition, by controlling the mixing ratio of the solidifying agent and the foaming agent, it is possible to freely control the unit weight and strength of the reinforcing soil, unlike the EPS, there is no fear of sinking due to creep and there is no advantage in that there is no change in physical / have.

Therefore, even if it is used as a reinforcing material in the construction of a retaining wall on a soft ground, there is no settlement of the ground, settlement amount is small, and the earth pressure applied to the wall of the retaining wall is reduced.

In the method of constructing the lightweight reinforced soil 400 described above, the soil collected from the site is sorted (by removing gravel and the like), water and a solidifying agent are put into the plant together and stirred in a slurry state, Since it is cured by the passage of time, there is no need for a separate smoothing work or compaction work, and construction is easy.

On the other hand, in the present embodiment, since the lightweight bubble-mixed soil is used as the reinforcing soil on the back surface of the panel by the backfill material, there is an advantage that the backfill length of the reinforcing soil material can be reduced by reducing the earth pressure. Also, by the hardened lightweight reinforcing material, Since the panel is integrated, the structural stability of the reinforced soil is excellent, and the backfill width of the reinforcing soil on the back surface of the panel can be minimized. As a result, the backfill length of the reinforced soil can not be sufficiently secured, Can be used as a suitable method. Especially, it can be used as a construction method which can shorten the construction period and can be constructed without additional land purchase because it is constructed on the slope part of the existing road without any additional ground improvement on the soft ground which is the ground when expanding the existing road on the soft ground.

7 shows a two-stage panel 200 in the form of a warm-up on the first panel 200 and 200 'and a second panel 200 in a state in which the band-shaped fiber reinforcement 300 is connected to the rear of the second panel 200, (Step 50) in which the liquid light-weight reinforcing filler 400b is secondarily placed in the rear of the airbag.

In this embodiment, by repeating the step S50 shown in Fig. 7 several times or dozens of times, it becomes possible to construct a reinforced earth retaining wall panel having a designed height as shown in Fig.

When the two-stage panel 200 is built, the temporary fixing clamp 120 used for the temporary fixing of the one-stage panel is disassembled and then the adjacent panels And the caulking material and the waterproofing nonwoven fabric are installed between the gap between the first panel and the second panel and the gap between the second panel and the liquid lightweight reinforcement.

In addition, the operation of installing the band-shaped fiber reinforcement in the rear of the two-stage panel and the operation of placing the liquid light-weight reinforcing soil are performed in the same manner as the operation in the one-stage panel, and a duplicate explanation will be omitted.

100: Foundation
110: temporary support
120: temporary fixing clamp
130: caulking material
140: Nonwoven fabric for waterproofing
200,200 ': Concrete panel
210: Reinforcing material insertion groove
220: Connecting pin insertion groove
230: Connection pin
300: Staple fiber reinforcement
310:
320: rear end
400a, 400b to 400f: lightweight reinforcing soil
G: Ground

Claims (3)

(S10) installing a foundation (100) at a construction site of a reinforced earth retaining wall; A single-panel construction step (S20) of placing a concrete panel as a temporary strut so as to adjoin the installed foundation 100 in the left-right direction and fixing the concrete panel so as to be supported by the provisional fixing clamps between adjacent panels 200 and 200 '; (S30) connecting a band-shaped fiber reinforcement 300 to a rear portion of the first panel 200, 200 'and laying the band-shaped fiber reinforcement 300 on the backfeed space; A step S40 of placing the liquid lightweight reinforcing material 400 obtained by mixing the field picking soil, the solidifying agent and the foaming agent with water in the backfill space at a height at which the band-shaped fiber reinforcing material 300 can be buried; After the second stage panel 200 is formed on the first panel 200 and 200 'and the band-shaped fiber reinforcement 300 is connected to the first panel 200 and 200', the liquid lightweight reinforcing material 400 is further raised to a height at which the band- (S50); and the step (S50) is repeated a plurality of times to construct a retaining wall at a desired height by using a lightweight reinforced earth retaining wall panel construction method;
The first panel 200 and the second panel 200 'are constructed such that the half panel 200' and the on-panel panel 200 are alternately formed on the left and right sides. The second panel 200 ' The panels 200 and 200 'have a front surface exposed to the outside, a rear surface contacting the reinforcing soil, left and right side surfaces having concave-convex engaging portions for engaging the adjacent panels to the left and right, and concave-convex engaging portions for coupling between the vertically adjacent panels A reinforcing material insertion groove 210 is formed on the rear surface of the reinforcing material insertion groove 210 and a connecting pin insertion groove 220 communicating with the reinforcing material insertion groove 210 is formed on the reinforcing material insertion groove 210, And the connecting pin 230 is inserted into the connecting pin insertion groove 220 while the front end portion 310 of the stiffener 300 is inserted into the stiffener insertion groove 210. Thus, The fiber reinforcing member 300 is connected,
Before the step S40, when the liquid lightweight reinforcing material 400 is inserted into the longitudinal gap between the base 100 and the first panel 200, 200 'and between the adjacent first panel 200, 200' A caulking operation using a caulking material 130 and a sheet for waterproofing nonwoven fabric 140 are installed to prevent leakage to the front,
The liquid lightweight reinforcing material 400 is also introduced into the reinforcing material inserting groove 210 and the connecting pin inserting groove 220 and cured so that the panel and the lightweight reinforcing material are integrally formed in step S40. Construction method of reinforced earth retaining wall panel. delete delete

Images