KR100467170B1 - reinforced earth retaining wall construction method - Google Patents

Abstract

The present invention relates to a reinforced soil retaining wall construction method. More specifically, the anchor reinforcement connected to various prefabricated retaining walls by fixing means is installed on the back wall retaining wall, but corrosion can be prevented, and above all, the length of the requirement can be easily adjusted according to the site conditions where the retaining wall is installed. The present invention relates to a reinforced earth retaining wall construction method that is capable of economically and practically reinforcing earth retaining wall construction by providing an anchor reinforcing body that is easy to change and apply to the installation. And a step of installing the reinforcement anchor body on the rear surface of the prefabricated retaining wall wall by means of fixing unit and finishing the prefabricated retaining wall wall to the required height.

Description

Reinforced earth retaining wall construction method

The present invention relates to a reinforced soil retaining wall construction method. More specifically, the anchor reinforcement connected to various prefabricated retaining walls by fixing means is installed on the back wall retaining wall, but corrosion can be prevented, and above all, the length of the requirement can be easily adjusted according to the site conditions where the retaining wall is installed. The present invention relates to a reinforced soil retaining wall construction method capable of constructing a reinforced soil retaining wall ultimately by providing an anchor reinforcing body that can be easily changed and installed.

In general, reinforcement soil retaining wall construction method is a method of reinforcing earth structure by inserting reinforcement material into the soil body. The object of development is the reinforcement such as lattice-shaped mesh grid, geogrid and rebar processed into various shapes, and various reinforcement connection structures are installed to install the reinforcement of various materials on the retaining wall. The branches have a retaining wall block.

That is, when the retaining wall block is manufactured in various shapes so that it can be combined with the reinforcing material, it is advantageous for the purpose of using the retaining wall block itself, but the purpose of the block cannot be achieved without the block. Above all, a separate facility and apparatus are required to manufacture the retaining wall block, which is not practical because concrete panels, hollow blocks, or waste tire blocks, which are usually mass-produced and inexpensive, cannot be used. Has and

In the case of stiffeners, the technical development is given to the material part, and it is possible to economically support the required earth pressure in the field, and furthermore, it is easy to adjust the size and length of the site conditions, so that the efficient work of installing stiffeners is possible. There is a problem that there is a limit to practically developed technology since there are few cases of technology development.

Accordingly, concrete panels, hollow blocks, or waste tire blocks for reinforcement soils conventionally used can be used as they are, and in the case of reinforcement materials that resist required earth pressure, the length and size can be freely adjusted depending on site conditions. It is necessary to develop a practical reinforced earth retaining wall construction method that can use a conventional reinforcing bar, but does not require a separate processing, and can easily change the installation structure and method according to site conditions.

The present invention is to solve the problems of the conventional reinforced soil retaining wall construction method as described above,

It is an object of the present invention to provide an economical reinforced earth retaining wall construction method that can be used without a separate modification of a conventional prefabricated retaining wall block capable of the most economical production.

Another object of the present invention is to prevent corrosion, to be very easy to install and transport, and to reinforce the anchor provided with fixing means, length adjusting means with a variety of prefabricated retaining wall blocks to facilitate the modification and application of the installation structure and method It is to provide a reinforced soil retaining wall construction method having a sieve.

1A and 1B are specific examples of a front view and a plan view of a state where the reinforcement anchor body of the present invention is installed when the retaining wall is a concrete panel.

Figures 2a and 2b is a plan view of the state in which the reinforcement anchor body of the present invention is installed when the retaining wall wall is a hollow block and a specific example of the configuration diagram in which the reinforcement anchor body is installed on the retaining wall wall.

Figure 3 is a specific example of a plan view of the retaining wall body is a state in which the reinforcement anchor body of the present invention is installed in the case of a waste tire block.

Figures 4a and 4b is a specific example of the front reinforcement and the connecting binder of the horizontal reinforcement bar of the reinforcement anchor body.

5A, 5B and 5C are specific examples and modified examples of the reinforcing anchor body of the present invention by the combination of the horizontal reinforcing bars and the vertical reinforcing bars.

Figure 6 is a specific example of the connecting device of the horizontal reinforcement bar and the vertical reinforcement bar.

7A, 7B, 7C, 7D, 7E and 7F are specific examples of reinforcing soil walls to which the reinforcing anchor body of the present invention is applied.

<Description of Major Codes in Drawings>

100: retaining wall wall 110: concrete panel

120: hollow block 130: waste tire concrete block

200: fixing means 300: reinforcement anchor body

310: horizontal reinforcement bar 320: vertical reinforcement bar

330: connecting means of the horizontal reinforcement bar and vertical reinforcement bar

Preferred embodiments of the present invention will be described in detail with reference to Figs.

In the reinforced earth retaining wall shaft construction method of the present invention after the pre-filled while retaining the prefabricated retaining wall wall 100 laminated on the foundation, the retaining anchor body 300 is connected to the prefabricated retaining wall wall 100 by the fixing means 200 as a prefabricated retaining wall wall And installing the prefabricated retaining wall wall 100 to the required height and installing the rear surface of the wall.

First, foundation trenches are made on the ground on which the reinforced soil retaining walls are to be built, and a plurality of retaining wall walls 100 are sequentially stacked on the foundation trench surfaces to a required height. At this time, in the case of the retaining wall wall 100, three forms may be used in the present invention. As shown in FIGS. 1A and 1B, a rectangular solid panel 110 and a hollow block 120 as shown in FIG. 130 may be used. This division will be said to have a difference in the fixing means 200 and the reinforcement anchor body 300 to be described later.

Any form is provided while stacking the retaining wall wall 100 to a height at which the reinforcing anchor body 300 is to be installed, while the backfill required for the rear surface is laminated while the retaining wall wall 100 is laminated.

The reinforcement anchor 300 is largely coupled by the retaining wall 100 and the fixing means 200, as shown in Figures 1 to 3 when used as a horizontal reinforcing bar (310, BAR) alone and as shown in FIG. The horizontal reinforcement bar 310 and the vertical reinforcement bar 320 may be combined in a grid shape, and in the case of combining the horizontal reinforcement bar and the vertical reinforcement bar, the connecting means 330 intersecting points of the horizontal reinforcement bar and the vertical reinforcement bar. Is installed on.

The horizontal reinforcing bar 310 and the vertical reinforcing bar 320 use ordinary reinforcing bars, but are buried by the backfilling soil, so that they do not support earth pressure due to the backfill acting on the retaining wall as a result of corrosion due to moisture. Because of the disadvantages, it is preferable to use galvanized or epoxy coated rebar, or to use a composite material that is not corroded materially, that is, a reinforced plastic product. The reinforcement plastic may be used, such as CFRP or GFRP.

The horizontal reinforcing bar 310 is fixed to the retaining wall by the retaining wall 100 and the fixing means 200, and the tip reinforcing body 311 is formed on the opposite side of the fixing means.

The fixing means 200 may be divided into two specific examples according to the type of the retaining wall wall 100.

The first embodiment 1 is the case of the retaining wall wall 100 is a conventional rectangular parallelepiped concrete panel 110. Unlike a hollow block, a conventional concrete panel has no hollow formed therein, so a hole for connecting the horizontal reinforcing bar 310 of the present invention should be formed. 1B is inserted into the hole 111 so that the horizontal reinforcing bar 310 is inserted and fixed as shown in FIG. 1B. The inner surface of the insert is formed with a female screw part, so that the concrete panel of the horizontal reinforcing bar and When the fastening by forming a male screw portion at the connecting end of the concrete panel 110 and the horizontal reinforcement bar 310 is coupled to the screw fastening.

Second embodiment 2 is the case of the retaining wall wall 100 is a hollow block 120 or a waste tire block 130. Since the hollow block 120 has a vertical connecting bar 121 and a hollow 122 formed therein as shown in FIG. 2A, the connecting end 123 of the horizontal reinforcing bar formed in the rear block has a connection end of the horizontal reinforcing bar 310. After passing through and positioned inside the hollow, a fixing means 200 capable of fixing the connecting end inside the hollow block is required.

The fixing means 200 is a pair of coupler 210 and the nut 220 is formed with a female thread on the outer peripheral surface. That is, after inserting the connecting end of the horizontal reinforcing bar 310 into the connecting hole 123 as shown in Figure 2b, the two pairs of coupler 210 is placed in a state to surround the connecting end with the nut 220 The transverse reinforcing bar is fixed to the connection hole over the inside of the connection hole. As a result, the horizontal reinforcement bar 310 is completely fixed to the hollow block, and is easy to install, secures sufficient fixing force, and has the advantage of being easily dismantled by the worker if necessary.

Looking at the modification of the fixing means such as couplers and nuts, without using a separate coupler and nut as shown in Figure 2b, the fixing end of the horizontal reinforcing bar 310 to the hook shape, and then the hollow block vertically The vertical connection bar 121 penetrates to be inserted into the hook.

Furthermore, in the case of the closed tire block 130, as shown in FIG. 3, the fixing means, such as a coupler and a nut, may be installed in the horizontal reinforcing bar, and the hook-shaped fixing end of the horizontal reinforcing bar may be inserted into the vertical connecting bar.

The tip reinforcing body 311 is a friction resistor of various shapes formed on the opposite side of the fixing end of the horizontal reinforcing bar 310, it is typically formed in a rectangular shape in Figures 1 to 3, but as shown in Figure 4a triangular, circular Or it may be formed in a variety of shapes, such as pentagons, the size is adjusted to resist the required earth pressure, and in order to process the end of the horizontal reinforcement bar 310 in the shape of a square, etc. As shown in FIG. 4B, binders 314 and 315 may be used. In addition, it is possible to bind the front reinforcement to the horizontal reinforcing bar by welding without using a binder.

The role of the horizontal reinforcing bar 310 serves as a resistance to the passive earth pressure acting on the reinforced soil retaining wall with a frictional force. In other words, the length and cross-sectional area of the transverse reinforcement bar is an important factor in order to obtain greater frictional force as a frictional resistor. When the transverse reinforcement bar is made of reinforcing bars, it may be difficult to prevent corrosion completely. The safety factor can be extrapolated to the length and cross-sectional area of a certain size or more to offset the reduction of the cross-sectional area due to corrosion by the extra cross-sectional area.

The tip reinforcement 311 is also installed to obtain a greater friction force. Thus, there is an advantage that the specific means for obtaining the required frictional force is provided by the length, cross-sectional area and the size and shape of the front reinforcement bar of the transverse reinforcement bar of the present invention.

The vertical reinforcement bar 320 may be additionally installed in the retaining wall wall 100 when the horizontal reinforcement bar 310 alone cannot secure a frictional force that resists the required earth pressure, and is perpendicular to the horizontal reinforcement bar 310. It is installed as shown in Figure 5c and the orthogonal portion is provided with a separate connecting means 330.

FIG. 5A is a plan view of the vertical reinforcing bar 320 installed in the horizontal reinforcing bar 310 when the retaining wall wall 100 is a hollow block 110. The vertical reinforcing bar 320 is illustrated in FIG. The number of installation of the can be adjusted as much as possible, which adjusts the number and spacing of the required according to the soil quality. That is, the operator can install two or more longitudinal reinforcement bars 320 at regular intervals according to the site conditions. If the installation position of the longitudinal reinforcement bars 320 is installed near the retaining wall by soil and free water, the required frictional force is required. If it is determined that it can not be secured, the operator can secure the longitudinal reinforcement bar 320 by closely spaced to the side to secure the frictional force as shown in Figure 5b. If the frictional force can be secured only by the number of longitudinal reinforcing bars 320, regardless of soil, as shown in Figure 5a may be installed in a plurality at regular intervals on the back surface of the retaining wall.

Furthermore, when there is no need to connect the longitudinal reinforcement bar 320 continuously as shown in FIG. 5C, the operator may install the longitudinal reinforcement bar in a discontinuous form as long as there is an obstacle between the economic point of view or the like.

The installation position, number and spacing of the vertical reinforcement bar can be freely installed and dismantled by site conditions, which is much more efficient and practical than conventional grid reinforcement without simply considering the site conditions. There is an advantage. In other words, when the grid-shaped reinforcement is installed on the ground where frictional force cannot be obtained, defects of reinforcement soil construction may occur eventually, and the repair is required, and thus, the maintenance and management of the retaining wall of the reinforcement soil is difficult. In the case of the invention, it is an advantage of the present invention that the cause of the repair can be predicted in advance and prevented, so that the design and construction management of the reinforced soil retaining wall can be more precise.

6 illustrates a specific example of the connecting means 330 of the horizontal reinforcing bar 310 and the vertical reinforcing bar 320. The connecting means 330 serves to fix a portion of the horizontal reinforcement bar 310 and the vertical reinforcement bar 320 perpendicular to each other, the function of the interval and the number of vertical reinforcement bar as described above It will be said that the adjustment means having a shape other than that shown in Fig. 6 is included in the present invention because it is in the adjustment.

Referring to Figure 6, the connecting means 330 is composed of a semi-circular receiving portion 331 that can accommodate the horizontal reinforcement bar and the connecting plate 332 formed on both sides of the receiving portion, cross orthogonal reinforcement bar In order to combine the 310 and the longitudinal reinforcing bar 320 in an orthogonal state, the two are installed in combination, and the lower connecting means 330b is installed to be orthogonal to the upper connecting means 330a which accommodates the horizontal reinforcing bar. . When the upper and lower connecting means are tightened with bolts and nuts, the horizontal reinforcing bars and the vertical reinforcing bars are fixed, and sleeves such as plate plates are not shown in FIG. 6 for more reliable connection of the horizontal reinforcing bars and the vertical reinforcing bars. It is preferable to insert between the lower connecting means.

Furthermore, if the horizontal reinforcing bar alone can secure the frictional force against the required earth pressure, it is not necessary to install the vertical reinforcing bar. In this case, the length of the horizontal reinforcing bar is said to be the controlling factor to secure the required frictional force. Based on the case of using the, since the length is already shipped as a factory product, it is necessary to install a number of reinforcing bars in order to secure the required frictional force. In this case, when connecting the reinforcing bars reinforcement with each other in the present invention can be used as a coupler and a nut as the connection device.

Furthermore, when the horizontal reinforcing bar is installed to protrude toward the rear side by the fixing means installed on the retaining wall, the horizontal reinforcing bar including the tip reinforcement is not effective in construction. In this case, as shown in FIG. 1, the connecting bar for the horizontal reinforcing bar is first projected to the rear side by using the fixing means, and then the other horizontal reinforcing bar, which has a predetermined length, is connected to the retaining wall by using a coupler and a nut. It is available. Therefore, the present invention has the advantage that the operator can adjust the length, number and spacing of the anchor reinforcement to build a stable retaining wall wall suitable for the site conditions.

The retaining wall wall 100 described above is stacked to the required height, and anchor anchors are also installed from the lower part to the upper part. The vertical gap and the horizontal gap of the anchor reinforcing body can resist the height and the required earth pressure of the retaining wall. It is determined by securing the frictional force.

Installation of retaining wall and anchor reinforcement is completed, and after filling the final filling, compacting and forming the necessary drainage, we complete the reinforced earth retaining wall.

Figure 7 shows a specific example of the object to which the anchor reinforcement of the present invention can be applied.

That is, Figure 7a schematically shows a case in which the anchor reinforcement body 300 is installed using the concrete panel 110 as the retaining wall wall 100,

FIG. 7B illustrates a case where the anchor reinforcement body 300 is installed using the hollow block 120 as the retaining wall wall path 100.

FIG. 7C schematically illustrates a case in which the retaining wall 100 is installed at both sides of the fill portion and the anchor reinforcement 300 overlaps with each other in the fill portion, as in the case of road fill.

FIG. 7d schematically illustrates the anchor reinforcement 300 installed on the slope stabilization block installed on the inclined surface.

In FIG. 7E, when anchor anchors are installed on the retaining wall, but the frictional force cannot be secured only by the length of the anchor reinforcement horizontally installed, the end of the anchor reinforcement is inclined by an anchoring device using the connecting device. It shows the case of extending the installation,

FIG. 7F illustrates a case in which grouting is performed in a separate hole for receiving the anchor reinforcing body installed as shown in FIG. 7E but separately inclined.

That is, in the case of FIGS. 7E and 7F, the present invention can be shown to be applicable to actual reinforced soil retaining wall construction by changing various shapes and structures according to site conditions.

The present invention can use a concrete panel, a hollow block and a waste tire concrete block as a retaining wall wall that is commonly used, it is possible to build a reinforced soil retaining wall without the production of a separate block is very practical, and above all, depending on the site conditions its size, spacing and Since the length can be changed by an operator, it is possible to construct a reinforcement retaining wall very efficiently. Therefore, it is possible to construct a reinforcement soil retaining wall very different from the one that emphasizes the ease of connection of a reinforcement while constructing a conventional reinforcement retaining wall.

Claims (10)

After backfilling and stacking the prefabricated retaining wall on the foundation, installing the fixing means and the reinforcing anchor with the prefabricated retaining wall on the back surface of the prefabricated retaining wall, and installing the prefabricated retaining wall to the required height and finishing the step. The anchor reinforcing body is a horizontal reinforcing bar having a tip reinforcing body formed by combining a vertical reinforcing bar or a vertical reinforcing bar orthogonal to the horizontal reinforcing bar, so that the distance between the length of the horizontal reinforcing bar and the vertical reinforcing bar can be easily adjusted. When the anchor reinforcement is used alone as a transverse reinforcement bar having a tip reinforcement, the length adjustment is performed by a coupler having a male screw on an outer circumferential surface of the transverse reinforcing bar facing each other and a connecting end protruding from the fixing means with the prefabricated retaining wall wall. And the nut to easily adjust the overall length of the horizontal reinforcement bar, When the anchor reinforcing body is formed by the combination of the horizontal reinforcing bar and the vertical reinforcing bar in which the tip reinforcing body is formed, the overall shape is installed in a grid shape, and the connecting portions intersecting with each other are composed of semicircular receiving grooves and connecting plates at both ends thereof. Reinforcement earth retaining wall construction method characterized in that the coupling device is fastened with a bolt and nut to be perpendicular to each other. The reinforced soil retaining wall construction method according to claim 1, wherein the prefabricated retaining wall wall is any one of a hollow block having a vertical connection bar, a concrete panel having an insert for transverse reinforcing bars, and a waste tire block. The method of claim 2, wherein the prefabricated retaining wall wall is a hollow block or a closed tire block having a vertical connection bar, the fixing means of the horizontal reinforcing bar of the reinforcement anchor body and the prefabricated retaining wall wall, A coupler installed to cover the connecting end of the horizontal reinforcing bar while hanging inside the hole for connecting the horizontal reinforcing bar penetrating the inside and the outside of the hollow block or the closed tire block; A nut fixed to the inside of the hollow block with a coupler covering the connecting end of the cross reinforcing bar; Reinforced soil retaining wall construction method comprising a. The method of claim 2, wherein the prefabricated retaining wall wall is a hollow block or a closed tire block having a vertical connection bar, the fixing means of the horizontal reinforcing bar of the reinforcement anchor body and the prefabricated retaining wall wall, Reinforced soil retaining wall construction method characterized in that the hook-shaped connecting end of the cross reinforcement bar is inserted into the vertical connecting bar through the connection hole penetrating the hollow block or the waste tire. The method of claim 2, wherein the prefabricated retaining wall wall is a prefabricated concrete panel, the fixing means of the horizontal reinforcing bar of the reinforcement anchor body and the prefabricated retaining wall wall is a connection hole is inserted into the insert formed in the concrete panel, the reinforcement in the insert Reinforced soil retaining wall construction method characterized in that the bar is fastened by screwing. The reinforced earth retaining wall construction of claim 1, wherein the horizontal reinforcing bar or the vertical reinforcing bar of the anchor reinforcing body is one of a bar (BAR) made of galvanized steel, epoxy coated steel, and a composite material. Method. The method of claim 1, wherein the front reinforcement of the transverse reinforcement bar of the anchor reinforcement body is formed in a polygonal or circular shape reinforced soil retaining wall shaft construction method. delete delete The method of claim 1, wherein the spacing adjustment of the longitudinal reinforcing bar of the anchor reinforcement body is adjusted to the required interval by the dismantling of the bolts and nuts of the connecting device.