KR100855014B1 - Precasted Concrete Retaining Wall with Tension - Google Patents

Abstract

The present invention is made of a reinforced concrete material by a precast method and are connected to each other to form a long retaining wall in one direction, extending from the bottom portion and the bottom portion having a tension material through hole in the longitudinal direction of the retaining wall A retaining wall segment comprising a wall surface portion having a tension member through-hole in the longitudinal direction of the retaining wall, a tension member inserted into the tension member through-hole of the retaining wall segment, and a length of the retaining wall among the retaining wall segments to fix the tension member to the retaining wall segment. A precast concrete retaining wall having a tensile force introduced therein comprising a fixing part provided in each of the retaining wall segments located at both ends in the direction.

Description

Precasted Concrete Retaining Wall with Tension}

1 is an embodiment of a conventional precast concrete retaining wall.

2 is a view for explaining a precast concrete retaining wall is a tension force introduced in accordance with an embodiment of the present invention,

3 is a cross-sectional view taken along line III-III shown in FIG. 2;

4 is a cross-sectional view taken along the line IV-IV shown in FIG. 2;

FIG. 5 is a view in which a tensioner for tensioning a stranded wire is mounted to a fixing unit shown in FIG. 2. FIG.

6 is a view showing a state where the reinforcing plate is fitted to the fixing unit shown in FIG.

Figure 7 is a view for explaining the precast concrete retaining wall introduced tension in accordance with another embodiment of the present invention.

** Explanation of symbols for the main parts of the drawing **

10: retaining wall segment 11: strand wire through hole

12: bottom portion 13: wall portion

20: stranded wire 30: fixing unit

31: fixing plate 32: wedge section

33: wedge plate 40: reinforcement plate

The present invention relates to a precast concrete retaining wall in which a tensile force is introduced, and more particularly, by installing a strand in the longitudinal direction of the retaining wall and introducing a tensile force to the strand, thereby facilitating the integration of the precast retaining wall segments and thus excellent. The present invention relates to a precast concrete retaining wall introduced with a tensile force that guarantees convenience and workability.

In general, retaining walls are installed on slopes of roads or railways, river banks, coastal roads, and residential areas to stabilize slopes. Until now, retaining walls have been mainly constructed by site-cast concrete. In other words, in order to construct the retaining wall, formwork and reinforcing bars are installed, and the retaining wall is constructed by placing and curing concrete with the formwork.

The construction method of the site-type retaining wall has a very long disadvantage because the process of ground excavation, foundation concrete, reinforcing steel, concrete, backfilling, etc. On-site casting concrete retaining wall performs reinforcement work of reinforcing bars based on the reinforcement degree prepared by design at the site, installs formwork, and then places concrete, in order to express strength that concrete can stand on At least 7 days curing period is required, and after curing, the work must be dismantled, so the air is very long. It is economically disadvantaged by such long air, and if there are roads in the vicinity, there is a problem that can cause a great loss socially due to problems such as controlling vehicle control or securing a bypass road.

In addition, when the height of the wall portion is high, there may be a case where the main body concrete cannot be poured at once, and there is a problem in the synthesis between the concretes.

In order to solve some of these problems, a method of constructing a retaining wall using precast retaining wall segments, such as Korean Utility Model Publication No. 420394, has been shown. The symbol used in the present specification is partially different from the symbol used in the heading 440394. Each retaining wall segment 6 presented in heading 42.94 consists of two foundation plates 1 and 2 and two walls 3 and 4, and two foundation plates 1 and 2 and a lower wall. The base plates 1 and 2 and the lower wall 3 are connected by the strand 5 penetrating (3), and the connection between the respective walls is connected to the connecting grooves 231 and 232 as shown in the detailed drawing. The wall connecting members 233 and 234 formed to protrude in part, and the coupler 235 connecting the wall connecting members 233 and 234 from both sides, and a filler 236 filled in the connection grooves 232 and 232.

With this configuration, the retaining wall segments 6 of each retaining wall are made up of several pieces, such as two foundation plates 1 and 2 and two walls 3 and 4, so that excessive time is required to assemble them in the field. It takes In addition, there are many strands (5) to be applied to the tensile force has a disadvantage that a lot of time and manpower is also required to apply the tensile force to the strand (5).

More deadly, the lengthwise connection of the retaining wall depends entirely on the wall connecting members 233 and 234 and the coupler 235. Since the fastening force by these structures is weak, the retaining wall structure does not properly support the soil load and slides after construction. There is a possibility of causing deformation. This is caused by poor integration of retaining wall segments. When stress is concentrated in a certain retaining wall segment, the connection between the retaining wall segment where the stress is concentrated and the surrounding retaining wall segment becomes the most vulnerable. Problems such as collapse can occur.

The present invention was derived to solve the above-described problems, the construction is simple and fast to build the retaining wall, as well as to strongly integrate the precast cast retaining wall segments to increase the resistance to the load on the retaining wall structural The purpose is to provide a precast concrete retaining wall with stable tensile force.

In order to achieve the above object, the present invention,

It is manufactured by using reinforced concrete as a material, and several are connected to each other to form a long retaining wall in one direction. The retaining wall extends from a bottom portion and a bottom portion having a tension member through hole in a longitudinal direction, and extends from the bottom portion. A retaining wall segment including a wall surface portion having a tension material through hole of

A tension member inserted into the tension member through-hole of the retaining wall segment;

A precast concrete retaining wall having a tension force introduced therein for fixing the tension member to the retaining wall segment, the fixing part being provided on each of the retaining wall segments positioned at both ends of the retaining wall in the longitudinal direction of the retaining wall segment. to provide.

The fixing unit,

A fixing plate fixed to the retaining wall segment and having a first through hole formed therein for passing a tension member;

Wedge shaped wedge pieces surrounding the outer circumferential surface of the tension member; And

And a wedge plate having a second through hole communicating with the first through hole and a tapered portion for accommodating the wedge fragment.

The outer peripheral surface of the wedge plate is preferably formed with a screw portion for screwing the tensioner for applying a tensile force to the tension member.

It is preferable to further include a reinforcing plate fitted between the wedge plate and the fixing plate in the radial direction of the tension member.

Hereinafter, with reference to the drawings will be described with respect to the precast concrete retaining wall introduced with a tensile force according to an embodiment of the present invention.

FIG. 2 is a view for explaining a precast concrete retaining wall having a tensile force introduced according to an embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. 5 is a state in which a tensioner for tensioning the stranded wire is mounted on the fixing unit shown in FIG. 2, and FIG. 6 is a view illustrating a state in which a reinforcing plate is fitted to the fixing unit shown in FIG. 5.

The precast concrete retaining wall introduced with the tensile force according to the present embodiment includes a retaining wall segment 10, a tension member, and a fixing unit 30.

The retaining wall segment 10 is manufactured in a precast manner using iron-based concrete. Precasting method is a method of manufacturing in a separate manufacturing plant, not on-site.

As shown in FIG. 2, the retaining wall segments 10 are arranged side by side in a row to form a long retaining wall in one direction.

The retaining wall segment 10 is composed of a bottom portion 12 and a wall portion 13 extending from the bottom portion 12, the cross section of which is generally similar in shape to the letter “L”.

The bottom line portion 12 and the wall surface portion 13 are each provided with a strand wire passage hole 11 formed in the longitudinal direction of the retaining wall. In the present embodiment, two stranded wire passing holes 11 are formed in the bottom surface portion 12, and three stranded wire passing holes 11 are formed in all of the stranded wire passing holes 11 in the wall surface portion 13.

As the tension member, the strand wire 20 used to introduce prestress into the concrete structure is generally used. The strand wire 20 is inserted into the strand wire through hole 11 formed in the retaining wall segment 10 is used to apply the force in the longitudinal direction of the retaining wall to the retaining wall, it is preferable to rust-resistant treatment to resist corrosion, Although not shown in the drawings, a stranded wire having a separate sheath and called a coated steel wire or an unattached steel wire may be used. The number of the strands 20 to be installed in this embodiment is three as the number of the strands through-holes 11 above.

The fixing unit 30 is provided on each of the retaining wall segments 10 positioned at both ends of the retaining wall segment 10 in the longitudinal direction of the retaining wall. In FIG. 2, the retaining wall segment 10 located on the leftmost side and the rightmost side of the retaining wall segments 10 are provided. It is provided in each of the retaining wall segments 10 located at.

The fixing unit 30 is to fix the strand 20 to the retaining wall segment 10, and is installed at a position corresponding to the strand line through-hole 11, and the strand line through-hole 11 in the present embodiment. Since these three are formed, three fixing units 30 are provided.

In the case where the strand 20 is fixed in the state where the tensile force is applied to the strand 20, the stretched strand 20 is elastically returned while the retaining wall segment 10 is integrated with the compressive force to apply the compressive force to the retaining wall segment 10. will be.

The fixing unit 30 includes a fixing plate 31, a wedge segment 32, and a wedge plate 33.

The fixing plate 31 is formed with a first through hole 311 for passing the strand 20, and the first through hole 311 is installed at a position in communication with the strand line through hole (11). . The fixing plate 31 is fixed to the retaining wall segment 10.

The wedge segment 32 is formed in a wedge shape surrounding the outer circumferential surface of the strand 20, and a product generally used to fix the strand 20 may be used.

The wedge plate 33 has a second through hole 331 communicating with the first through hole 311 and a taper portion 332 and a screw portion 333 for accommodating the wedge segments 32.

The tapered portion 332 is in contact with the outer circumferential surface of the wedge segments 32 and prevents the wedge segments 32 from moving in the clamped strand 20.

The screw portion 333 is provided on the outer circumferential surface of the wedge plate 33, and is configured to be screwed to the tensioner for applying a tensile force to the strand 20, as shown in Figure 5 to the screw portion 333 The tensioner 100 and the wedge plate 33 with the corresponding threaded portion 101 to be screwed.

Hereinafter, the function, operation, and effect of the precast concrete retaining wall in which the tensile force is introduced according to the above-described embodiment will be described.

The retaining wall segment 10 of the present embodiment is manufactured by a precasting method, but when the retaining wall segment 10 is manufactured by the precasting method, the retaining wall segment 10 is manufactured by using a fixed facility in a factory and thus can be worked under optimal conditions. As a result, there is an advantage that can improve the accuracy (accuracy) and strength (콘크리트 度) compared to the concrete product constructed in the field.

When the retaining wall segment 10 manufactured by the pre-casting method comes to the site, the retaining wall segments 10 are arranged in a line, the strand wire 20 is inserted into the strand wire through-hole 11, and the tensile force is applied to the strand wire 20. At both ends of the strand, the fixing portion 30 is fixed to the retaining wall segment 10. This is to apply prestress to the retaining wall segment 10, which has the advantage that the retaining wall segments 10 can be very strongly integrated.

After the prestress in the longitudinal direction of the retaining wall is applied to the retaining wall segments 10 using the strand 20, the backfill is performed. The soil is filled between the retaining wall and the existing ground.

FIG. 7 shows a retaining wall segment 10 'used for a precast concrete retaining wall in which a tensile force is introduced according to another embodiment of the present invention. The shape of the retaining wall segment 10' is smaller than that of the retaining wall segment 10 described above. Since the ruler is upside down and there are differences only in the number of the strand wire passing holes 11 ', the strand wire 20', and the fixing unit 30 ', detailed description thereof will be omitted.

Hereinafter, the case of further including a reinforcing plate will be described.

The strand wire 20 of the present embodiment uses a non-attached steel wire or a stranded wire that is subjected to rust prevention treatment, and does not grout the strand wire passing hole 11. Therefore, it is possible to apply any additional tension to the strand 20, if the construction of the retaining wall after a certain period of time, such as the relaxation of the strand 20 is generated structural stability when the tensile force introduced to the strand 20 is reduced Since it will fall, it is necessary to check the magnitude of the tensile force introduced into the strand 20 periodically, and it is necessary to re-tension when deemed necessary.

However, the portion of the strand 20 that passes through the wedge section 32 and exposed to the outside is about 1-2cm for aesthetic reasons and the rest are cut, so the tensioner 20 is re-installed by installing a tensioner on the strand 20. It is practically impossible to tension, in the case of the present invention by providing a threaded portion 333 on the outer periphery of the wedge plate 33, by using the tensioner 100 having a corresponding threaded portion 101 corresponding to the threaded portion 331 The strand 20 can be retensioned. Only part of the tensioner 100 is shown in FIG. 5, and the tensioner may use a hydraulic tensioner that is generally used.

On the other hand, when the strand 20 is tensioned in the tensioner 100, the wedge plate 33 and the wedge fragment 32 and the strand 20 is all moved, by such a wedge plate 33 and the fixing plate A gap is formed between the 31 and the reinforcing plate 40 is inserted into the gap, but the reinforcing plate 40 may fit the radial direction of the stranded wire 20.

When taking the configuration further provided with the above-mentioned reinforcing plate 40 is to have the advantage that can re-tension the strand 20 and maintain its tensioned state.

In the above description, an embodiment in which a fixing plate, a wedge segment, and a wedge plate having a threaded portion are formed as the fixing unit has been described. However, the technical idea of the present invention necessarily includes a wedge plate having a fixing plate, a wedge segment, and a threaded portion as the fixing unit. It is not limited to the Example.

Although the preferred embodiments of the present invention have been described above, the technical spirit of the present invention is not limited to the described embodiments, and precast concrete having various types of tensile force introduced therein without departing from the technical spirit of the present invention. It will be apparent to those skilled in the art that the retaining wall can be implemented.

As described above, according to the present invention, not only can the construction of the retaining wall be simple and fast, but also the strong integration of the precast retaining wall segments increases the resistance to the load on the retaining wall, resulting in a structurally stable tensile force. Introduced precast concrete retaining wall.

Claims (3)

It is manufactured by using reinforced concrete as a material, and several are connected to each other to form a long retaining wall in one direction. The retaining wall extends from a bottom portion and a bottom portion having a tension member through hole in a longitudinal direction, and extends from the bottom portion. A retaining wall segment including a wall surface portion having a tension material through hole of A tension member inserted into the tension member through-hole of the retaining wall segment; And a fixing part for fixing the tension member to the retaining wall segment, the fixing part being provided on each of the retaining wall segments located at both ends of the retaining wall in the longitudinal direction of the retaining wall segment. The method of claim 1, The fixing unit, A fixing plate fixed to the retaining wall segment and having a first through hole formed therein for passing a tension member; Wedge shaped wedge pieces surrounding the outer circumferential surface of the tension member; And And a wedge plate having a second through hole communicating with the first through hole and a tapered portion for accommodating the wedge fragment. A precast concrete retaining wall having a tension force introduced on an outer circumferential surface of the wedge plate is formed with a screw portion for screwing into a tensioner for applying a tension force to the tension member. The method of claim 2, And a reinforcing plate fitted between the wedge plate and the fixing plate in the radial direction of the tension member.

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