KR102186038B1 - Reinforcing Method for Panel of Temporary Retaining Wall, and Panel Reinforced by Such Method - Google Patents

Abstract

The present invention has a configuration in which an earth plate is installed between the thumb piles, and in a temporary earth protection facility that temporarily supports the rear soil, when excessive stress acts on the earth plate or inappropriate displacement occurs during common use, reinforcement of the earth plate is required. In addition, the method of reinforcing the earth plate of the temporary earth protection facility to improve or maintain the structural stability of the temporary installation by reinforcing the stiffness of the earth plate afterwards by assembling and integrating the horizontal reinforcement at the desired position in front of the earth plate quickly, easily and efficiently. , It relates to an earth plate reinforced by such a reinforcing method.

Description

Reinforcing Method for Panel of Temporary Retaining Wall, and Panel Reinforced by Such Method}

The present invention relates to an earth plate used in a temporary earth protection facility that is temporarily installed to support the back soil, and a method of reinforcing the earth plate, and specifically, it has a configuration in which an earth plate is installed between the thumb piles, so that the rear soil is temporarily When reinforcing the earth plate is required due to excessive stress or improper displacement occurring on the earth plate during common use in the earth protection facility supported by the earth plate, the horizontal stiffener is quickly, easily and efficiently assembled at the desired position in front of the earth plate. The present invention relates to a method of reinforcing a earth plate of a temporary earth protection facility, which reinforces the stiffness of the earth plate afterwards by integrating it to improve or maintain the structural stability of the temporary facility, and to a earth plate reinforced by such a reinforcement method.

In ground excavation work, such as excavation work, temporary earth protection facilities are installed to prevent collapse of the excavated ground. 1 and 2 are schematic perspective views of a conventional temporary earth protection facility 100, respectively. In general, the tent temporary facility 100 is a thumb pile 9 made of a beam having an H-shaped cross section and vertically penetrated into the ground at predetermined intervals along the ground excavation line, and between the thumb piles 9 It is constructed in the form of inserting and disposing the earth plate 8, and the earth plate 8 and the thumb pile 9 installed in this way have a structure to support the earth pressure caused by the rear soil. The earth plate 8 is made of a plate material having a predetermined thickness. As shown in FIG. 1, a plurality of plate materials may be sequentially inserted and stacked in a vertical direction across the thumb piles 9, as shown in FIG. It may be made of a single large plate and placed vertically between the thumb stakes (9).

The earth plate 8 needs to have sufficient stiffness to support the back earth pressure, but when the vertical height of the earth protection facility is large, a situation in which a large back earth pressure exceeding the designed stiffness acts on a part of the earth plate may occur. For example, if the excavation depth of the excavation is large, the vertical height of the temporary facility increases in proportion to it, so the action of excessive stress due to the locally large back earth pressure at the bottom of the earth plate and the resulting structurally unfavorable abnormal displacement (Excessive bending displacement to the front, etc.) can occur.

When an improper displacement occurs due to the excessive stress action on the earth plate in this manner in the earth protection facility, there is currently no technology to effectively cope with this. Since the rear earth pressure increases vertically downward, the position where abnormal displacement occurs due to excessive stress acting on the earth plate is mainly the lower end of the temporary facility, and as shown in FIG. 1, when a plurality of earth plates are vertically stacked, Abnormal displacement may occur in the earth plate located mainly below. However, when the earth plates are stacked in this way, to replace the earth plate with a problem, that is, the defective earth plate, all the earth plates above the earth plate must be removed. The removal of such earth plates itself is not easy. When the earth plate is removed, the rear surface Since there is a growing concern for the collapse of the soil, another measure to temporarily support the back soil pressure is required, which causes various problems such as considerable cost and time consuming. Even when the earth plate is made of one plate as shown in FIG. 2, the entire earth plate must be completely removed and replaced in order to solve the abnormal displacement occurring in a specific area, which is not appropriate from the viewpoint of cost or structural stability of the temporary earth protection facility. . Therefore, when a local abnormal displacement occurs due to excessive stress generation in the earth plate while the earth protection facility is completed, there is a desperate need for a technology that can intensively reinforce only the corresponding location (the location where the abnormal displacement occurred locally).

Republic of Korea Utility Model Publication No. 20-0409056 discloses a technology titled "Reinforcement structure of earth plate for civil engineering", but this is to install a reinforcing member on the surface of earth plate in advance before installing the earth plate between thumb piles. Bar, there is a limitation that it cannot be applied in the state that the earth protection facility is already completed.

Republic of Korea Utility Model Publication No. 20-0409056 (announced on February 20, 2006).

The present invention was developed to overcome the limitations of the prior art as described above, and when an abnormal displacement occurs at some earth plate or some points of the earth plate when the earth protection facility is completed, or if reinforcement is required for other reasons, only the corresponding point is selected. It is an object of the present invention to provide a technique capable of reinforcing by increasing the stiffness of the earth plate by an efficient method.

In particular, a technology that allows reinforcement work to be performed on the reinforcement point from the front of the earth plate, so that the reinforcement work can be efficiently performed without the restriction of the point where reinforcement is required, thereby reducing the time and cost required for reinforcement. It aims to provide.

In order to achieve the above object, in the present invention, as a method of reinforcing the earth plate installed between the thumb piles in the earth protection facility, the earth plate has a plurality of oval-shaped fastening through holes in which an elliptical long axis is arranged in the horizontal direction. Has been; Install a fastening bolt consisting of an oval bolt head and a bolt body through the fastening through hole from the front of the earth plate to the rear, but insert the elliptical bolt head into the fastening through hole from the front of the earth plate in a state that matches the fastening through hole. By turning the bolt body from the front of the earth plate, the elliptical long axis of the elliptical bolt head located on the rear surface of the earth plate and the elliptical long axis of the fastening through hole are in a position that is offset from each other, and making the bolt body protrude from the front of the earth plate to exist; Making the bolt body protruding from the front of the earth plate penetrate the through hole by intimately contacting the horizontal reinforcing material made of a flat plate with the through hole formed thereon; And fastening the nut member to the bolt body protruding through the through hole so that the nut member is in close contact with the horizontal reinforcing member, thereby assembling and fixing the horizontal reinforcing member in close contact with the front of the earth plate. There is provided a method for reinforcing a earth plate, characterized in that it is assembled and installed in close contact with the earth plate and integrated with the earth plate to reinforce the earth plate to increase its flexural stiffness.

In addition, in the present invention, there is provided an earth plate for temporary installations reinforced by such a reinforcing method.

In the reinforcing method of the present invention and the earth plate reinforced thereby, the short side side wall plate extending in the front direction from the flat side of the horizontal reinforcing material is integrally provided; Two tension wires are located in front of the flat plate in a horizontal direction, but each fixing end of the tension wire is fixed to the side wall plate on the short side, and a turnbuckle is arranged between the free ends of the two tension wires, so that the two tension wires are horizontal. It is provided continuously while forming a straight line in the direction; Following the step of assembling and fixing the horizontal reinforcement in close contact with the front of the earth plate by coupling the nut member to the fastening bolt, by rotating the turnbuckle, pulling both tension wires so that the free ends of both tension wires come close to each other to apply tension to the horizontal reinforcement. By performing the step of introducing; It may have a configuration in which a support force capable of supporting the rear earth pressure is further applied to the earth plate by allowing a bending stress to bend the flat plate in the rear direction by introducing the tension force.

In particular, in this case, a front end of the bolt body protruding from the front of the earth plate is assembled with a stretchable member capable of lengthening and contracting, and the front end of the stretchable member is in close contact with the tension wire; Following the step of introducing a tension force to the horizontal reinforcing member, the length of the elastic member is elongated to induce a tensile stress in the tension wires connected to each other, so that the force is applied in the direction of the rear surface acting on the elastic member. It may have a configuration in which an additional support force is applied to the earth plate in the rear direction by being transmitted to the horizontal reinforcing material through the nut member and the flat plate.

In the present invention, the horizontal reinforcing material is assembled and installed in close contact with the earth plate front of the temporary facility, thereby increasing the bending stiffness of the earth plate that resists the back earth pressure, and thus, even if the back earth pressure increases, excessive bending stress is prevented from acting on the earth plate. It is possible to prevent the earth plate from protruding in the front direction due to abnormal displacement, and accordingly, the effect of securing the structural stability of the temporary facility is exhibited.

In particular, in the present invention, the integral assembly of the horizontal reinforcement can be carried out from the front of the earth plate, and the horizontal reinforcement can be installed at any time and at any position as necessary, even in a state where the construction of the earth protection facility is completed and the back soil is filled. In this way, it is possible to very easily and quickly perform reinforcement to a required degree only for local points requiring reinforcement in the earth plate.

Further, in the present invention, the horizontal reinforcement is installed on the earth plate to reinforce it, but by introducing a tension force to the tension wire, the horizontal reinforcement can induce a bending stress in the rear direction. Even if the earth plate is reinforced with the same degree of bending stiffness, the size of the horizontal reinforcement It is possible to reduce the stiffness, etc., thereby exhibiting advantageous effects such as cost reduction, and the advantage of being able to reinforce the earth plate more efficiently. In this case, it is possible to introduce additional support in the direction of the rear soil by using the fastening bolts and the elastic member, and through this, it is possible to reinforce the earth plate more efficiently, and only for some specific positions or specific areas in the length of the horizontal stiffener. The additional support force in the rear direction can be made to act, so that the reinforcement for the rear earth pressure can be concentrated in a specific location or area.

1 and 2 are schematic perspective views of a conventional temporary earth protection facility, respectively.
3 and 4 are schematic perspective views, respectively, showing different directions of facing the reinforced earth retaining facility by attaching a horizontal reinforcing material to an earth plate according to the first embodiment of the present invention.
5 is a schematic exploded perspective view showing that the reinforcing structure of FIGS. 3 and 4 is formed.
6 is a schematic perspective view of a fastening bolt used in the present invention.
7 is a schematic partial enlarged view of the circle A of FIG. 3.
8 is a schematic partial enlarged view of a circle D of FIG. 4.
9 is a schematic enlarged perspective view of a portion corresponding to circle B of FIG. 3 showing that reinforcement is made by attaching a horizontal reinforcing material to an earth plate according to a second embodiment of the present invention.
10 is a schematic perspective view corresponding to FIG. 9 showing that reinforcement is made by attaching a horizontal reinforcement material to an earth plate according to a third embodiment of the present invention.
11 is a schematic enlarged perspective view of a circle C of FIG. 10.
12 is a schematic perspective view of an example of an elastic member used in the third embodiment of the present invention.
13 is a schematic plan cross-sectional view in the vertical direction along arrow FF of FIG. 10.
FIG. 14 is a schematic perspective view corresponding to FIG. 10 showing a state in which an additional supporting force is generated by extending the elastic member following the state shown in FIG. 10.
FIG. 15 is a schematic plan cross-sectional view in the vertical direction along arrow EE of FIG. 14.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention has been described with reference to the embodiment shown in the drawings, but this is described as an embodiment, by which the technical idea of the present invention and its core configuration and operation are not limited.

3 and 4 are schematic perspective views showing in different directions to look at the reinforced earth retaining facility 100 by attaching a horizontal reinforcing material 1 to the front of the earth plate 8 according to the first embodiment of the present invention, respectively. 3 is shown so that the front surface of the earth plate 8 is visible, and FIG. 4 is a view so that the rear surface of the earth plate 8 is visible. 5 is a schematic exploded perspective view showing that the reinforcing structure of FIGS. 3 and 4 is formed. In FIG. 5, for convenience, an exploded perspective view is shown for only one horizontal stiffener 1, and illustration of other horizontal stiffeners is omitted. And, for convenience, the width direction of the earth plate 8 in the earth protection facility 100 is described as "horizontal direction", and the direction from the thickness direction of the earth plate 8 toward the front of the earth plate 8 is described as "front direction", The direction toward the back soil is described as "back direction". That is, in FIG. 3, the arrow X-X direction is the horizontal direction, the arrow Y1 direction orthogonal thereto in the plane is the front direction, and the arrow Y2 direction is the rear direction. It is described that the height direction of the retaining facility, that is, the arrow Z-Z direction of FIG. 3 is a vertical direction. As shown in FIG. 1, the present invention can be applied equally to the fact that a plurality of plates are sequentially inserted and stacked in a vertical direction across the thumb piles 9 to form the earth plate 8, but for convenience, the earth plate 8 is The present invention will be described by exemplifying what is made of one plate.

As shown in the drawings, in the present invention, by assembling and installing a horizontal reinforcing member 1 extending horizontally in the front of the earth plate 8, the flexural rigidity of the earth plate 8 is reinforced at the corresponding position. The horizontal reinforcing material 1 is a member having a flat plate 10 in close contact with the front surface of the earth plate 8 extending in the horizontal direction, and as illustrated in the drawing, the flat plate 10 is made of a square shape, and the flat plate 10 The side wall plates 11 and 12 extending in the front-rear direction from all four edges of) may be integrally provided to form a box-shaped beam member. However, it is not limited thereto. A through hole 13 through which a fastening bolt 2 to be described later passes is formed in the flat plate 10.

The earth plate 8 is formed with a fastening through hole 80, the fastening through hole 80 is formed in an elliptical shape, but the elliptical long axis is disposed in a horizontal direction. These oval-shaped fastening through holes 80 may be formed by passing through the thickness of the earth plate 8 in plural at intervals in the horizontal direction at the position where the horizontal reinforcement 1 is installed. As such, a plurality of fastening through holes 80 are sequentially arranged in a horizontal direction to form one row, and furthermore, a plurality of rows of these fastening through holes 80 exist in a vertical direction. It can be.

The fastening through hole 80 may be formed in the earth plate 8 post-mortem when reinforcement is required, but may be formed in the earth plate 8 in advance before constructing the temporary facility. In this case, it is preferable to temporarily cover the fastening through hole 80 with a protective film or the like before installing the earth plate 8 between the thumb piles 9 or filling the rear soil.

When reinforcement of the earth plate 8 is required, the fastening bolt 2 having the elliptical bolt head 20 is passed through the fastening through hole 80 and installed. 6 is a schematic perspective view of the fastening bolt (2), the fastening bolt (2) is composed of an oval bolt head (20) and a bolt body (21) consisting of a rod member formed with a threaded portion. The fastening bolt (2) is inserted through the fastening through hole (80) from the front of the earth plate (8) toward the rear, and the elliptical bolt head (20) is positioned so that the elliptical long axis is in the horizontal direction, In a state where the shape of) matches the fastening through hole 80, the oval bolt head 20 is inserted into the fastening through hole 80 from the front of the earth plate 8.

When the elliptical bolt head 20 penetrates the earth plate 8 and is located on the rear surface of the earth plate 8, the operator rotates the bolt body 21 at the front position of the earth plate 8 and fastens it with the elliptical bolt head 20 The elliptical shapes of the through holes 80 are made not to match each other. FIG. 7 shows a schematic partial enlarged view of the circle A portion of FIG. 3, and FIG. 8 shows a schematic partial enlarged view of the rear surface of the portion shown in FIG. 7, that is, the circle D portion of FIG. 4. Has been. The operator performs the work of turning the bolt body 21 at the front position of the earth plate 8, as illustrated in FIG. 8, the elliptical bolt head 20 located on the rear surface of the earth plate 8 through the earth plate 8 A, the elliptical long axis is made to be in the vertical direction. Of course, as illustrated in FIG. 8, the elliptical long axis of the elliptical bolt head 20 and the elliptical long axis of the fastening through hole 80 are not necessarily perpendicular to each other, and the elliptical long axis of the elliptical bolt head 20, It is sufficient if the elliptical long axes of the fastening through holes 80 cross each other at a predetermined angle and shift. Although the rear soil is filled in the back of the earth plate (8) in the state that the earth protection facility is built, the operator would have pinched the oval bolt head (20) in the fastening through hole (80) in front of the earth plate (8) as above. At this time, the rear soil can accommodate the elliptical bolt head 20, and the elliptical bolt head 20 is allowed to rotate on the rear surface of the earth plate 8. When the oval shape of the oval bolt head 20 and the fastening through hole 80 is not matched with each other, the fastening bolt 2 is not pulled out even if the fastening bolt 2 is pulled in the front direction of the earth plate 8. do.

A fastening bolt 2 having an elliptical bolt head 20 is assembled and installed in each of the plurality of fastening through holes 80 in the same way as described above, and the earth plate is in a state where the fastening bolts 2 are installed. In front of (8), the bolt body 21 protrudes. Subsequently, the horizontal reinforcing material 1 is in close contact with the front of the earth plate 8 so that the bolt body 21 protruding from the front of the earth plate 8 penetrates the horizontal reinforcing material 1, and then the horizontal reinforcing material 1 By screwing the nut member 6 to the bolt body 21 passing through the bolt body 21 and in close contact with the horizontal reinforcing member 1, the horizontal reinforcing member 1 is closely assembled and fixed to the front of the earth plate 8. That is, the flat plate 10 of the horizontal reinforcing material 1 is in close contact with the earth plate 8, but the bolt body 21 is made to pass through the through hole 13 of the flat plate 10. The through hole 13 formed in the flat plate 10 may be formed as a simple circular hole, but may be formed in an elliptical shape through which the elliptical bolt head 20 can pass.

As described above, in the present invention, the horizontal reinforcing material 1 is assembled and installed in close contact with the front of the earth plate 8 of the temporary facility to be integrated with the earth plate 8, thereby increasing the bending stiffness of the earth plate 8. That is, the horizontal reinforcing material 1 is integrally assembled and installed on the earth plate 8, thereby increasing the bending stiffness of the earth plate 8 to resist back earth pressure. Therefore, even if the back earth pressure increases, it is possible to prevent excessive bending stress from acting on the earth plate 8, and prevent the earth plate 8 from protruding in the front direction due to abnormal displacement, thereby securing structural stability of the temporary facility. do.

In particular, in the present invention, as described above, the integral assembly of the horizontal reinforcing material 1 can be performed at the front of the earth plate 8, and the construction of the earth protection facility is completed, and the rear soil is filled in the rear surface of the earth plate 8 Even in the state, it is possible to install the horizontal stiffener 1 at any time and at any position as needed. Therefore, there is an advantage in that reinforcement to the required degree can be performed very easily and quickly only for local points requiring reinforcement in the earth plate 8.

In the first embodiment of the present invention shown in Figs. 3 to 8, the horizontal reinforcing material 1 has a flat plate 10 in close contact with the front of the earth plate 8, but the flat plate 10 is made of a square, The side wall plates 11 and 12 extending in the front direction from all four edges of the flat plate 10 are integrally provided. That is, the horizontal reinforcing material 1 provided in the first embodiment of the present invention shown in FIGS. 3 to 8 is a flat plate 10, two short side side wall plates 11, and two long sides. It is made of a box-shaped member provided with side wall plates 12. However, in the present invention, the horizontal reinforcing material 1 is not limited thereto, and has a flat plate 10 that is in close contact with the front of the earth plate 8, but the cross section in the horizontal direction is various so as to form a Hangul consonant b shape, an English T shape, etc. It can be made of a shaped bending beam.

On the other hand, in the present invention, as the horizontal reinforcement (1), in the case of using the horizontal reinforcement (1) provided with the short side side wall plate (11) at both ends in the horizontal direction, the horizontal reinforcement by tension using the tension wire (3) ( By introducing prestress to 1), the reinforcing effect by the horizontal reinforcing material 1 can be maximized.

9 is a schematic perspective view showing an enlarged view of only the portion where the horizontal reinforcing material 1 is attached to the front of the earth plate 8 and reinforced, that is, the portion corresponding to circle B in FIG. 3 according to the second embodiment of the present invention. Is shown. As illustrated in the drawings, when the horizontal reinforcing material 1 has a configuration including the flat plate 10 and the short side side wall plates 11 at both ends in the horizontal direction, first, as described in connection with the first embodiment of the present invention, Likewise, the flat plate 10 is assembled to the front surface of the earth plate 8 and integrated at the position (point) where reinforcement is required. Two tension wires (3) are placed in the front of the flat plate 10 in the horizontal direction, respectively, and one end of each tension wire (3) is fixed to the side wall plate (11) on the short side. At both ends of the tension wire 3, the end fixed to the side wall plate 11 on the short side of the horizontal reinforcement 1 in this way is called a "fixed end", and the opposite end is called a "free end".

Two tension wires by placing a turnbuckle 4 between the free ends of the two tension wires 3 facing each other in the state where each fixing end of the tension wire 3 is fixed to the side wall plate 11 on the short side. (3) is made to be continuous while forming a straight line in the horizontal direction. When the turnbuckle 4 is rotated while the tension wire 3 is installed in this way, the tension wires 3 on both sides are pulled so that the free ends of the tension wires 3 are close to each other, and accordingly, the horizontal reinforcing material 1 ), the side wall plate 11 on the short side of the side wall plate 11 also has a compressive force in the horizontal direction. Eventually, the horizontal reinforcing material 1 is subjected to a bending stress to flexurally deform the plate 10 in the rear direction by the tension force, and thus the earth plate 8 is added with a supporting force capable of supporting the rear earth pressure. That is, in the second embodiment of the present invention, by introducing a tension force to the tension wire 3 as above to induce a bending stress in the rear direction to the horizontal reinforcing member 1, the bending stiffness of the earth plate 8 is reinforced. Therefore, there is an advantage that the reinforcement for the earth plate can be made more effectively. That is, even if the earth plate is reinforced with the same degree of bending stiffness, the size or rigidity of the horizontal reinforcing material can be reduced, and thus advantageous effects such as cost reduction are exhibited.

Above, it has been described that the flat plate 10 is closely fixed to the earth plate 8 and then the tension wire 3 is arranged and the tensioning operation is performed by the turnbuckle 4, but if necessary, the horizontal reinforcing material 1 In the state in which the tension wire 3 and the turnbuckle 4 are combined and arranged in the manner described above, the flat plate 10 is closely fixed to the earth plate 8 to integrally install the horizontal reinforcing material 1, and the turnbuckle 4 Tension can also be introduced by rotation. Furthermore, the horizontal reinforcement 1 may be integrally installed by attaching the tension wire 3 and the turnbuckle 4 to the installation, and in a state where the introduction of the tension force by tension is completed, the flat plate 10 in close contact with the earth plate 8. .

On the other hand, when the tension wire 3 is installed on the horizontal reinforcing material 1 as described above, the fastening bolt 2 and the elastic member 4 are connected in parallel with or separately from the introduction of tension force by direct tensioning of the tension wire 3 It can also be used to introduce additional support in the direction of the back soil.

10 to 15 are diagrams for a third embodiment of the present invention, respectively. Specifically, Figure 10 is a horizontal reinforcing member (1) having a configuration capable of introducing an additional support force in the rear direction using a fastening bolt (2) and a tension wire (3) further provided with an elastic member (5) is the front of the earth plate (8) As a schematic perspective view corresponding to FIG. 9 showing that it is attached to, it shows a state in which the elastic member 5 has not yet been extended. FIG. 11 is a schematic enlarged perspective view of a circle C of FIG. 10, and FIG. 12 is a schematic perspective view of an example of an elastic member 5 used in the third embodiment of the present invention. 13 is a schematic plan sectional view in a vertical direction taken along arrows F-F of FIG. 10.

In the third embodiment of the present invention, two tension wires 3 are disposed in a horizontal direction and connected to each other in the same manner as in the second embodiment described above, and are installed on the horizontal reinforcing material 1. In addition to this, an elastic member 5 capable of extending and contracting in length is further assembled and coupled to the front end of the fastening bolt 2, and the elastic member 5 is assembled to the fastening bolt 2 and in an integrated state. The front end of 5) is in close contact with the tension wire (3). That is, in the case of the second embodiment shown in Figure 9, there was a gap between the front end of the bolt body 21 forming the fastening bolt 2 and the tension wire 3, the third embodiment of the present invention In the space between the fastening bolt 2 and the tension wire 3, an elastic member 5 capable of expanding and contracting its length is installed.

When the length of the elastic member 5 is elongated in the state where the elastic member 5 is installed in this way, a tensile stress is generated in the tension wires 3 connected to each other, and thereby, the rear surface of the elastic member 5 The force acts in the direction. FIG. 14 is a schematic perspective view corresponding to FIG. 10 showing a state in which an additional supporting force is generated by extending the elastic member 5 following the state shown in FIG. 10, and FIG. 15 is an arrow EE of FIG. A schematic flat cross-sectional view in the vertical direction according to is shown.

As shown in Figs. 14 and 15, when the length of the elastic member 5 is elongated in the state where the elastic member 5 is installed, a tensile stress is generated in the tension wires 3 connected to each other. Therefore, an additional force is applied to the elastic member 5 and the fastening bolt 2 in the rear direction. Since the nut member 6 is in close contact with the front of the plate 10 for fastening and fixing the fastening bolt 2, the force in the rear direction applied to the fastening bolt 2 is applied to the flat plate 10 through the nut member 6. ). That is, the horizontal reinforcing material 1 is applied with an additional support force (additional support force) in the rear direction, and accordingly, the reinforcing effect of further increasing the stiffness of the earth plate 8 against the rear earth pressure is exhibited.

In particular, in the third embodiment of the present invention as described above, there is an advantage that local reinforcement is possible very precisely in the horizontal direction. In the assembly and coupling of the horizontal reinforcing member 1 to the earth plate 8, a plurality of fastening bolts 2 may be provided at intervals along the length of the horizontal reinforcing member 1. In this state, when the elastic member 5 is elongated as above for only some of the fastening bolts 2, the force in the rear direction due to the tension of the tension wire 3 is the corresponding elastic member, that is, elongated and the tension wire 3 It is applied only to the elastic member that pushed in the front direction, and as a result, an additional support force in the rear direction is applied to the earth plate 8 intensively only at the position where the corresponding elastic member is provided. As described above, in the third embodiment of the present invention, the additional support force in the rear direction can be made to act only for some specific positions or specific areas in the length of the horizontal reinforcing material 1, It has the advantage of being able to focus on the area. Of course, in the third embodiment, the effect of being able to reinforce the earth plate more efficiently is exerted by introducing an additional support force in the rear soil direction using a fastening bolt and an elastic member.

In applying the third embodiment of the present invention, by installing a turnbuckle 4 between the two tension wires 3, the state in which the tension wire 3 itself induces tensile stress as in the second embodiment above. In, as described above, the elastic member 5 may be elongated, but unlike the tension wire 3 itself, the elastic member 5 may be elongated without causing a tensile stress. As the elastic member 5, as illustrated in FIG. 12, a member of a method of advancing and retreating in the front direction by rotation may be used, but is not limited thereto. It is preferable that a concave portion 50 is formed at an end portion of the elastic member 5 in the front direction, that is, an end that is directly in close contact with the tension wire 3 so that the tension wire 3 does not escape.

In describing the second and third embodiments of the present invention with reference to Figs. 9 to 15, as in the first embodiment of the present invention illustrated in Figs. 3 to 8, in the horizontal reinforcing member 1, It is illustrated that the long side side wall plate 12 is provided, and when the long side side wall plate 12 is provided, the bending stiffness of the horizontal reinforcing material 1 itself increases, so that the degree of reinforcement of the earth plate 8 can be increased. Although there is an advantage of being there, the long side side wall plate 12 may be omitted. That is, the horizontal reinforcing material 1 is provided with the side wall plate 11 on the short side, and the earth plate 8 can be reinforced according to the second and third embodiments of the present invention. If necessary, by installing a reinforcing rib between the flat plate 10 and the short side side wall plate 11 instead of the long side side wall plate 12, sufficient flexural rigidity of the horizontal reinforcing material 1 itself can be secured.

1: horizontal stiffener
2: tightening bolt
3: tension wire
4: turnbuckle
5: elastic member
6: nut member
8: earth plate
9: thumb stake
10: reputation
11: Short side side wall plate
12: long side side wall plate
20: bolt head
21: bolt body
80: fastening through hole
100: temporary installation

Claims (6)

As a method of reinforcing the earth plate (8) installed between the thumb piles (9) in the earth protection facility (100),
The earth plate 8 is formed with a plurality of elliptical fastening through holes 80 in which an elliptical long axis is disposed in a horizontal direction;
A plurality of fastening bolts (2) consisting of an elliptical bolt head (20) and a bolt body (21) are installed through the fastening through holes (80) from the front to the rear of the earth plate (8), along the length of the horizontal reinforcement (1). Two fastening bolts (2) are made to be provided at intervals. After inserting the oval bolt head (20) into the fastening through hole (80) from the front of the earth plate (8) in a state made to match the fastening through hole (80) By turning the bolt body 21 from the front of the earth plate 8, the elliptical long axis of the elliptical bolt head 20 located on the rear surface of the earth plate 8 and the elliptical long axis of the fastening through hole 80 are shifted from each other. And making the bolt body 21 protrude from the front of the earth plate 8 to exist;
A box with a flat plate 10 having a through hole 13 formed therein, two short side side wall plates 11 extending in the front direction, and two long side side wall plates 12 Making the bolt body 21 protruding from the front of the earth plate 8 through the through hole 13 by closely contacting the horizontal reinforcing material 1 made of a member of the shape to the front surface of the earth plate 8; And
The nut member 6 is fastened to the bolt body 21 protruding through the through hole 13, so that the nut member 6 is in close contact with the flat plate 10 of the horizontal reinforcing material 1, and the fastening bolt 2 By including the step of assembling and fixing the horizontal stiffener 1 in close contact with the front of the earth plate 8 so that the force in the rear direction applied to the nut member 6 is transmitted to the flat plate 10 and the earth plate 8, The horizontal reinforcing material 1 is assembled and installed in close contact with the front of the earth plate 8 of the temporary facility and integrated with the earth plate 8 to reinforce the earth plate 8 to increase the flexural stiffness;
Two tension wires (3) are located in front of the flat plate (10) in the horizontal direction, but the fixing ends of each tension wire (3) are fixed to the side wall plate (11) on the short side, and two tension wires (3) Turnbuckles 4 are disposed between the free ends of the two tension wires 3 are provided in a straight line in the horizontal direction and are continuously provided;
The front end of the bolt body 21 protruding from the front of the earth plate 8 is assembled with an elastic member 5 capable of lengthening and contracting, and the front end of the elastic member 5 is attached to the tension wire 3 In close contact, the end of the elastic member 5 that is in direct contact with the tension wire 3 has a concave part 50 formed therein, and the tension wire 3 is placed in the concave part 50 so that the tension wire 3 is expanded and contracted. Does not deviate from the end of the member 5;
Following the step of assembling and fixing the horizontal stiffener 1 in close contact with the front of the earth plate 8 by coupling the nut member 6 to the fastening bolt 2, the turnbuckle 4 is rotated, and both tension wires 3 Introducing a tension force into the horizontal reinforcement (1) by pulling the tension wires (3) on both sides so that the free ends of the) are close to each other; And
By elongating the length of the elastic member 5, by performing the step of inducing a tensile stress in the tension wires 3 connected to each other, the force in the rear direction acting on the elastic member 5 is applied to the fastening bolt 2 And the nut member (6), and passing through the flat plate (10) to the horizontal reinforcing material (1), further step of making an additional support force to be applied to the earth plate (8) in the rear direction. Reinforcing method of the earth plate, characterized in that comprising.
delete delete As the earth plate (8) installed between the thumb pile (9) in the temporary installation (100),
A plurality of elliptical fastening through-holes 80 in which the elliptical long axis is disposed in the horizontal direction are formed;
A fastening bolt (2) consisting of an oval bolt head (20) and a bolt body (21) is installed through the fastening through hole (80) from the front to the back of the earth plate (8), Two fastening bolts (2) are provided at intervals, and the elliptical bolt head (20) is inserted into the fastening through hole (80) from the front of the earth plate (8) in a state made to match the fastening through hole (80). By turning the bolt body 21 from the front of (8), the elliptical long axis of the elliptical bolt head 20 located on the rear surface of the earth plate 8 and the elliptical long axis of the fastening through hole 80 are in a position that is offset from each other. And a fastening bolt 2 is installed so that the bolt body 21 protrudes from the front of the earth plate 8 and exists;
A box with a flat plate 10 having a through hole 13 formed therein, two short side side wall plates 11 extending in the front direction, and two long side side wall plates 12 A horizontal reinforcing member 1 made of a member of the shape is fixedly installed in a state in close contact with the front surface. In a state where the bolt body 21 protruding from the front of the earth plate 8 penetrates the through hole 13, the flat plate ( 10) The nut member 6 is fastened to the bolt body 21 protruding outward so that the nut member 6 is in close contact with the horizontal reinforcing member 1, so that the horizontal reinforcing member 1 is closely assembled to the front of the earth plate 8 It is integrally fixed and has a configuration in which the force in the rear direction applied to the fastening bolt 2 is transmitted to the flat plate 10 and the earth plate 8 through the nut member 6;
Two tension wires (3) are located in front of the flat plate (10) in the horizontal direction, but the fixing ends of each tension wire (3) are fixed to the side wall plate (11) on the short side, and two tension wires (3) Turnbuckles 4 are disposed between the free ends of the two tension wires 3 are provided in a straight line in the horizontal direction and are continuously provided;
Nut member (6) is coupled to the fastening bolt (2), the horizontal reinforcement (1) is tightly assembled and fixed to the front of the earth plate (8), and the expansion and contraction member capable of extending or contracting the length at the front end of the bolt body (21) (5) is assembled and coupled, and the front end of the elastic member 5 is in close contact with the tension wire 3, and the end of the elastic member 5 in direct contact with the tension wire 3 has a concave portion 50 Is formed and the tension wire 3 is placed in the recess 50 so that the tension wire 3 does not deviate from the end of the elastic member 5;
Both tension wires (3) are pulled so that the free ends of both tension wires (3) are brought close to each other by the rotation of the turnbuckle (4), and tension force is introduced into the horizontal reinforcement (1), and the flat (10) Tension wires in a state in which the length of the elastic member 5 is elongated and connected to each other in a state in which a supporting force capable of supporting the rear earth pressure is applied in the rear direction so that the bending stress to bend the rear surface is applied. 3) by inducing a tensile stress, the force acting on the elastic member 5 in the rear direction is transmitted to the horizontal reinforcement material 1 through the fastening bolt 2, the nut member 6, and the flat plate 10 (8) The earth plate of the temporary installation of a soil barrier, characterized in that reinforced to increase the flexural stiffness by applying additional support in the rear direction. delete delete

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