KR100826895B1 - Decreased-stress type retaining wall on the advantages to backfill - Google Patents

Abstract

According to the present invention, a longitudinal wall portion is formed on a wall as a stress point portion, and one end of the stress point member is fastened to the longitudinal wall portion, and then the other end of the stress point member is fastened to the base plate supporting member of the base plate. The present invention relates to a stress-retaining retaining wall capable of securing a sufficient working space.

Backfill, Compaction, Stress Retaining Retaining Wall

Description

Stress-Retaining Retaining Wall for Compacting Back Soil {DECREASED-STRESS TYPE RETAINING WALL ON THE ADVANTAGES TO BACKFILL}

Figure 1a shows a conventional subwall retaining wall,

Figure 1b shows a conventional stress reducing retaining wall,

Figure 1c shows the mechanism of action of the conventional stress reducing retaining wall.

Figures 2a, 2b and 2c are shown in order the construction of the stress-retaining retaining wall is advantageous for compacting the soil,

Figure 2d shows a wall cross section of the present invention.

<Description of Major Codes in Drawings>

100: base plate 110: wall receiving portion

120: base plate support member 121: stress point member fixing unit 1

200: wall 210: longitudinal wall portion

211: stress point member fixing unit 220: transverse protrusion end

240: wall cast steel 300: stress point portion

310: stress point member

The present invention relates to a stress reducing composite retaining wall that is advantageous for compacting soil. More specifically, the present invention relates to a concrete retaining wall composed of a concrete wall and a base plate installed for stabilization of cut or fill slopes, and more particularly, to a stress-retaining retaining wall manufactured to sufficiently secure a backing soil space.

Conventional inverted T-shaped concrete retaining wall (10, Retaining Wall) is to form the base plate 11 and the wall 12, as shown in FIG. And the curing process, the installation period of the formwork, rebar assembly period, concrete casting period and curing period of the concrete took a very long time, the retaining wall construction period was required for a relatively long time,

In order to install the retaining wall, both the base plate 11 and the wall 12 are manufactured by pouring concrete at the site, so the quality of the concrete is not constant according to the conditions of the site.

In order to resist the earth pressure caused by the backing soil and the flooring load backing the retaining wall, the reinforcing wall 13 was reinforced, especially in the back of the wall. The size of the inevitably grows

As a result, the excessive use of concrete and reinforcing bars and the large amount of formwork in the construction of retaining walls resulted in increased construction costs and difficulties in construction. There was no problem that the use is limited.

Accordingly, the applicant of the present invention forms the base plate support portion 13 and the stress point portion 14 formed as protruding ends on the top surface of the base plate 11 and the rear surface of the wall 12 as shown in FIG. Is inserted into the wall accommodating part 15 formed in the front part of the base plate 11, and both ends of the stress point member 16 are connected to the base plate support part 13 of the base plate 11 and the stress of the wall 11. It has been developed a stress-retaining retaining wall that can significantly reduce the bending moment due to earth pressure acting on the wall 12 only by binding between the points 14.

This will be described with reference to Figure 1c the action of the stress point member 16.

First, as shown in the upper part of FIG. 1C, the earth pressure due to the back soil is generated as a triangular distribution (earth pressure distribution diagram) in which the lower earth pressure is larger.

Since the lower part of the wall 12 is fixed and supported by the base plate 11, the earth pressure is a bending moment (M +, Bending Moment Diagram, BMD) that allows the entire wall to be conducted forward (wall front direction) with the lower part of the wall as a reference point. Since the wall height increases as the height of the wall increases, the wall cross-sectional design is inevitably made to resist this, and if the bending moment can be reduced under the same conditions, a more economical wall cross section can be designed. Will be.

Thus, in the present invention, the stress point 14 is formed so that the bending moment acting on the wall can be significantly reduced.

The stress point portion 14 is formed on the rear surface of the wall 12, as shown in Figure 1b over the entire width of the wall in the transverse direction.

That is, the stress point portion 14 formed on the wall A rear surface A as a protruding end continuously in the lateral direction acts as a point portion for the wall stress generated by the earth pressure.

In order to form the point portion, as shown in FIG. 1B, the anchor fixing portion 2 (17, a kind of fastener) installed in the stress point portion 14 is installed, and one end of the stress fixing member 16 is connected to the anchor fixing portion 2 ( 17), and the other end of the stress point member 30 to be anchored to the anchor fixing portion 1 (18, a kind of fastener) embedded in the base plate support portion 13 of the base plate 10.

At this time, the base plate support 13 is also formed on the upper surface of the base plate 11 as a protruding end in the transverse direction.

Accordingly, the stress point portion 14 itself in the form of a projecting end to which the stress point member 16 is bound is structurally acted as a structural point portion of the wall 10.

At this time, the stress point member 16 is positioned so that both ends are opposed to the anchor fixing parts 1 and 2 by the butt plate to bind the base plate 11 and the wall 12, so that the butt plate can be bound to each other. Bolts and nuts were to be tightened.

Shown at the bottom of FIG. 1c is a bending moment diagram (BMD) for earth pressure acting as the stress point portion 14 is formed by the stress point member 16,

As a result, not only the size of the upper bending moment M + relative to the stress point portion 14 can be significantly reduced, but also the lower bending moment M- acts in the opposite direction to which earth pressure acts. It can be seen that the earth pressure acting on the wall 20 is significantly reduced,

Accordingly, the retaining wall including the base plate 11 and the wall 12 in which the base plate support 13 and the stress point portion 14 are formed is referred to as a stress reducing retaining wall.

In this case, in the case of the stress-retaining retaining wall, the wall 12 and the base plate 11 are manufactured in a precast panel member method and installed at the site, and have a constant transverse width. The width of the plate 11 and the wall 12 in the lateral direction is 2.6m to produce the retaining wall 1 unit (UNIT).

That is, the stress point member 16 installed on the base plate 10 and the wall 20 constituting the retaining wall 1 unit (UNIT) is provided between the base plate 11 and the wall 12 by actuating earth pressure Make it more appropriate to resist.

However, at this time, when at least two stress point members 16 are installed in the retaining wall 1 unit as shown in FIG. 1B, the stress point member 16 is compacted when the necessary compaction is made after backing the backing soil on the rear surface of the wall 12. Due to the problem of obstacles in the work, there is an urgent need to develop a technology for a new stress reducing retaining wall that can secure enough space for compacting the soil while maintaining the structural advantages of the stress reducing retaining wall.

The present invention is to solve the problems of the prior art,

An object of the present invention is to provide a stress reducing retaining wall that can easily secure the space required for compacting the soil while maintaining the structural advantages of the stress reducing retaining wall.

The present invention to achieve the above technical problem, the retaining wall of the present invention

First, while adopting the stress point portion 300 that is formed on the rear surface of the wall 200 of the conventional stress reducing retaining wall, but in forming the stress point portion 300

First, one longitudinal wall portion 210 extending in the longitudinal direction (up and down direction) is formed at the central portion of the wall transverse width roughly corresponding to the retaining wall 1 unit, and then a stress point portion is formed on the longitudinal wall portion 210. At least one of 300) was formed up and down. The wall is composed of the longitudinal wall portion 210 and the wall plate 230 on the back so that the cross section can be configured as a T-shaped cross section.

That is, the wall plate 230 and the longitudinal wall portion 210 to act as a wall of the conventional stress-retaining retaining wall, but the longitudinal wall portion (to the earth pressure acting by making the wall plate 230 thin) 210 is mainly resisted, and the stress point portion 300 is formed as a stress point member fixing portion 2 (211) of the protruding end shape in the longitudinal wall portion (210).

Accordingly, one end of the stress point member 310 is bound to the stress point member fixing unit 2 211, and the other end thereof is bound to the base plate 100.

At this time, the other end of the stress point member 310 and the binding of the base plate 100, in the form of a protruding end on the upper surface of the base plate support portion 120 of the same shape as the longitudinal wall portion 210 on the base plate 100. The other end of the stress point member 310 is bound to the formed stress point member fixing part 1 (121) so as to be possible.

So basically it can be constructed as a stress-retaining retaining wall,

In the retaining wall 1 unit, one longitudinal wall portion 210 is formed at the center so that the distance to the longitudinal wall portion 210 of the other unit can be relatively widened, resulting in a stress point member. The separation distance of (300) was to be widened to ensure sufficient soil compaction space.

Second, the stress point member is to use a structural member, such as steel rods, steel pipes, pre-stress may be introduced, it can be simply installed as a support member not introduced.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

Figure 2a shows the base plate 100 and the connected state constituting the retaining wall of the present invention,

Figure 2b is a view showing a state of coupling of the wall 200 and the base plate 100 constituting the retaining wall of the present invention,

Figure 2c shows a completed state diagram of the retaining wall of the present invention,

Figure 2d shows a cross-sectional view of the wall A-A of the present invention.

First, as shown in FIG. 2A, the base plate 100 of the present invention is installed on a ground not shown, and a stress point member that is installed to be inclined between the wall 200 and the base plate 100 while basically supporting the wall 200 ( 310 is manufactured in the form of a plate having a rectangular parallelepiped having a predetermined thickness so as to be installed.

Accordingly, the wall accommodating part 110 having the receiving groove 111 is formed on the front part of the base plate 100 so that the wall 200 of the present invention is in contact with the side surface in the lateral direction and can be installed in succession.

In addition, the base plate support portion 120 to which the stress point member 310 is connected is formed on the upper surface of the base plate 100 in the width direction from the central portion of the wall accommodating part 110.

The base plate support part 120 has a stress point member fixing part 1 121 is formed in the form of a protruding end.

For example, using a formwork, the stress point member fixing portion 1 121 of the concrete stepped form may be naturally formed, and in some cases, it may be installed using a steel piece.

In the stress point member fixing unit 1 121, a normal fastener may be embedded so that the butt plate formed at the other end of the stress point member 310 to be described later may be fastened to each other by a connection bolt and a nut.

In addition, the base plate 100 of the present invention, except for the wall accommodating part 110 and the base plate support part 120 is formed of a thin thickness, which is a wall in the member constituting the base plate 100 This is because the receiving part 110 and the base plate support part 120 serve as a main structural member capable of resisting the working earth pressure, so that there is no reason to form a thick thickness as in the prior art.

As a result, the production of the base plate 100 of the present invention enables economical production as a more efficient cross-sectional design.

The length of the transverse direction that can be produced in one unit in such a base plate 100 may vary depending on the conditions of transportation and construction, but when viewed based on a rough 2.6m, a number of base plates (according to the retaining wall installation length) 100) should be connected to each other.

The horizontal connection of the base plate was made possible by the engagement form by the shear groove 131 and the shear key 132 formed on the side of the base plate 100.

That is, the side surfaces of the plurality of base plates 100 are fitted to each other in the transverse direction to be installed continuously.

Wall 200 of the present invention is a member that is fixed to the lower end is inserted into the wall receiving portion 110 formed in the front portion of the base plate 100, and functions as a structural member that resists the working earth pressure and also the base plate 100 It is made of a member in the form of a plate which is a rectangular parallelepiped having a predetermined thickness as described above, and is composed of a longitudinal wall portion 210, a transverse protrusion end 220, and a wall plate 230.

The transverse width, which can also be manufactured in one unit, may vary depending on the conditions of transportation and construction, but is made of a precast member having the same transverse width as that of the base plate 100.

One longitudinal wall portion 210 extending in the longitudinal direction (up and down direction) is formed at a substantially central portion of the rear surface of the wall plate 230 having the above width,

The transverse protruding end 220 is formed on the top of the rear wall of the wall integrally with the longitudinal wall part 210, and the transverse protruding end 220 may be referred to as a finishing part of the retaining wall upper end.

That is, the wall of the present invention is to mainly resist the working earth pressure by making the longitudinal wall portion 210 and the wall plate 230 to act as the wall 200 of the retaining wall.

Therefore, as the stress point 300 for constructing the stress-retaining retaining wall as shown in FIG. 2B, the stress point member fixing part 2 211 in the form of a protrusion is formed on the longitudinal wall part 210, and the stress point member is fixed. Part 2 (211) so that the fastener is embedded so that one end of the stress point member 310 can be fastened to each other by the connection bolt and the nut.

Next, one end and the other end of the stress point member 310 are coupled to the stress point member fixing part 2 211 of the wall 200 and the stress point member fixing part 1 121 of the base plate 100.

This binding is abutting plate at both ends of the stress point member 310 so that it can be fastened by a connecting bolt and a nut in the fastener buried in the stress point member fixing unit 1 (121) and the stress point member fixing unit 2 (211). It is possible to use a manner of forming a but may be used other ordinary fastening means.

For example, when the stress point member fixing part 1 121 and the stress point member fixing part 2 211 are formed as steel pieces, the stress point member 310 is fixed to the stress point member fixing part 1 121 and the stress point member. It may be welded to part 211.

At this time, the stress point member 310 may use a variety of members in any cross-sectional shape, such as rods, pipes, wire ropes, steel pipes with a coating layer may be used so as not to be corroded because it is embedded in the backing soil and the mechanical fasteners and simply mechanical Since the installation in the form of fastening can be greatly improved.

In addition, when prestress is introduced, one end of the tendon is fixed to the stress point member fixing unit 2 211 while the other end of the tendon is fixed to the stress point member fixing unit 1 121 as the stress point member 310, for example. Prestress may be introduced into the stress point member 310 by fixing after tension.

In this case, only one longitudinal wall portion 210 is formed at the center of the wall unit 1 in the unit, and a stress point member 310 is bound to the longitudinal wall portion 210 so that another wall is formed. The distance to the stress point member 310 of the unit (UNIT)

As shown in FIG. 1B, the separation distance can be increased relatively compared to the case where two stress point members are installed in the conventional wall unit 1, thereby sufficiently securing the compaction space of the backing soil.

Since the stress point member 310 as described above is installed along the longitudinal wall member 210 as shown in FIG. 2B, at least two or more stress point members 310 may be moved up and down without affecting the distance between the stress point members. It can be installed so that the wall 200, which must resist the working earth pressure, can sufficiently secure the deterrent force that is not conducted in the direction of the working earth pressure.

In addition, the wall plate 230 may be made of a thin wall plate 230 so that it can also be manufactured in an efficient wall cross-sectional shape. This is also possible because the member mainly resisting the working earth pressure of the wall is formed of the longitudinal wall portion 210.

The wall receiving part 110 and the stress point member fixing part 1 (121) to the base plate 100 consisting of a base plate support 120 formed in the form of a protruding end,

The longitudinal wall portion 210, in which the stress point member fixing portion 2 211 is also formed in the form of a protruding end, installs the wall 200 formed on the rear surface of the wall plate 230,

FIG. 2C illustrates a state where one end of the stress point member 310 is bound to the stress point member fixing part 1 121 and the other end is bound to the stress point member fixing part 2 211.

According to FIG. 2C, it can be seen that a plurality of reinforcing bars 240 are arranged inside the wall 200, and the reinforcing bars 240 are main reinforcing bars installed in the transverse direction.

The reason why the main reinforcing bars 240 are installed in the transverse direction as described above is that the members mainly resisting the load acting on the wall 200 of the present invention are the longitudinal wall parts 210 except for the longitudinal wall parts 210. The wall plate 230 structurally functions as a kind of slab, and the longitudinal wall portion 210 functions as a cantilever member having a lower portion supporting the slab.

As a result, the wall of the present invention has a transverse cross-sectional shape formed in a T-shaped cross section as shown in FIG. 2D.

In this way, the wall plate 230 to function as the slab is to be reinforced in the transverse direction to the wall plate 230 to more effectively resist the working earth pressure.

This is because the conventional stress point is installed in the transverse direction, as shown in Figure 1b, it can be seen that the main reinforcement shape of the main reinforcement compared to the case where the reinforcement of the wall is installed in the longitudinal direction, which is the wall 200 This is a very important check point in cross section design.

The retaining wall 1 unit as shown in FIG. 2C can construct a final retaining wall having a desired length by constructing a plurality of cross-sections in a lateral direction.

That is, the base plate 100 is connected to each other by a shear key, a shear groove, and the wall 200 is also not shown, but to form a shear key, a dedicated groove on the side to connect to each other or to the adhesive side such as epoxy You can also connect them together.

The rear surface of the final retaining wall installed as described above is to be laid a plurality of compacting work over a certain height, in the case of such compacting in the prior art has been functioning as an obstacle that hinders the compaction of the stress point member, but sufficient compaction in the present invention The separation distance can be secured so that the work can be made more effective compaction work.

The retaining wall of the present invention can be enhanced with the workability for compaction of the backing soil while adopting the advantages of the stress-retaining retaining wall developed by the applicant of the present invention as it is, so that a more effective and universal retaining wall construction is possible.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. Those skilled in the art of the present invention can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

Claims (8)

A wall erected on the front surface of the base plate and having a stress point portion formed on its rear surface; And a stress reducing retaining wall provided with a stress point member inclined between the wall rear surface and the upper surface of the base plate. The base plate and the wall is made of a precast member having a constant transverse width to be connected in the transverse direction, In order to increase the lateral spacing of the stress point member, the wall is composed of a wall plate having a thin thickness and a longitudinal wall portion extending over the entire height of the wall plate in the longitudinal direction at the center of the transverse width of the rear surface of the wall plate. To receive earth pressure, A stress reducing retaining wall, which is advantageous for compacting the backing soil, characterized in that the stress point portion is formed in the longitudinal wall portion so that the stress point member is installed between the stress point portion formed in the longitudinal wall portion and the upper surface of the base plate. . The stress reducing retaining wall of claim 1, wherein the stress point portion is formed in a protruding end portion in the longitudinal wall portion. 3. The stress-retaining retaining wall of claim 2, wherein the main reinforcing bar of the wall is arranged to extend in the lateral direction. The base plate according to any one of claims 1 to 3, wherein the base plate is provided with a wall accommodating part in which a receiving groove into which a wall is inserted in a transverse direction is formed in a front portion thereof, and a stress point member is connected from the wall accommodating part. Stress-retaining retaining wall advantageous for compacting the backing soil, characterized in that the cardboard portion is formed on the upper surface of the base plate. The method of claim 4, wherein the stress point member is one end is connected to the stress point portion and the other end is connected to the upper surface of the base plate support portion of the base plate, the stress point member is installed as a simple support member or a prestress introduced member Stress-retaining retaining wall advantageous for compacting the backing soil, characterized in that. delete delete delete

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