KR20020088695A - Construction Method for Expansion Joint of Retaining Wall using Dowel Bar and Cap - Google Patents

Abstract

PURPOSE: An expansion joint method for a retaining wall using a dowel bar and a cap is provided to prevent the breaking of a structure and to improve the quality of a structure. CONSTITUTION: The expansion joint method for a retaining wall using a dowel bar and a cap comprises the steps of: installing a cap(12) provided with an opening, a sealing cap(13) and a spring(14) to one end of a dowel bar(11); forming an expansion joint by treating the outside of the dowel bar(11) with wash primer(2); fixing the expansion joint to a form or a reinforcing bar at the appointed intervals; forming a retaining wall by placing concrete(4) into the form; and removing the form, then installing an expansion joint member(3) between retaining wall units.

Description

Construction Method for Expansion Joint of Retaining Wall using Dowel Bar and Cap}

The present invention relates to a retaining wall expansion joint construction method using a dowel bar and a cap, and more particularly, to prevent the vertical action of the expansion and contraction action of the concrete structure according to the temperature change and to make the left and right actions perfectly It is a method for constructing a retaining wall expansion joint that can improve durability and quality by preventing cracks from occurring and obtain material saving effects.

Retaining walls are widely used in civil engineering and construction work to support the sides of cuts and fillets, and such retaining walls are designed to resist the earth pressure and prevent their collapse. Robustness is required.

In the construction of the retaining wall, the PVC pipe cap 102 is placed on the outer side of the Dowel bar 101 to accommodate the stretching action of the concrete retaining wall according to the temperature change, as shown in FIG. 3, and the filler (asphalt) 103 therein. ) And then processed by the heaping process, one side of the dowel bar 101 is embedded in one retaining wall unit, and the other side is poured concrete 105 so that the other retaining wall unit is embedded, and the expansion joint material ( 105) was installed.

However, in general, the expansion and contraction action of the concrete retaining wall structure should be able to perform only the left and right action, the construction method as described above, the space is generated up and down, left and right, and the stretching action occurs both up and down, left and right, causing cracks, As rainwater enters the space, rust occurs in the dowel bar, which causes a problem of degrading the performance of the joint.

In addition, when the expansion joint of the retaining wall is not able to maintain the expansion space is often there is a problem that inhibits the activity of the structure, thereby causing a crack.

The present invention has been made in consideration of the above problems, and an object thereof is to provide a construction method that can smoothly expand and contract according to the temperature change of the concrete retaining wall structure to prevent the destruction of the structure and improve the quality, A spring is installed between the dowel bar and the sealing cap to free the left and right activities of the concrete retaining wall according to the temperature change, and the rust prevention paint or tape treatment is applied to the part where the conventional cap is installed to prevent the inflow of rainwater to prevent rust. At the same time, it is completed to improve the durability and quality by preventing the vertical stretching of the structure.

1 is a cross-sectional view showing a retaining wall expansion joint structure according to the present invention

Figure 2 is an exemplary view showing the expansion joint installation process according to the present invention

Figure 3 is a cross-sectional view showing a conventional retaining wall expansion joint structure

<Description of the symbols for the main parts of the drawings>

(1) expansion joint (2) antirust paint

(3) Expansion Joints (4) Concrete

(5) Formwork (11) Dowel Bar

(12) Cap (13) Sealing Cap

14 springs

101 Douel Bar 102 caps

(103) Fillers (104) Concrete

(105) expansion joints

Figure 1 is a retaining wall expansion joint structure according to the present invention, Figure 2 shows an exemplary view showing the expansion joint installation process according to the present invention, the present invention in the retaining wall expansion joint using the dowel bar and the cap, one side The opening is formed in the other side and the sealing cap 13 is installed on the other side, the step of installing the cap 12 is installed on one side of the dowel bar 11 with the spring 14 installed therein, and the dowel bar ( 11) forming an expansion joint (1) by rust-proof paint (2) or tape treatment on the outer periphery, and one side of the expansion joint (1) is embedded in one retaining wall unit and the other side is embedded in another retaining wall unit Fixing to formwork 5 or reinforcing bars (not shown) at predetermined intervals, and placing retaining wall by pouring concrete 4 into the formwork 5, and between the retaining wall units after removing the formwork 5; To install the expansion joint material (3). This completes the retaining wall expansion joint.

The cap 12 has a circular opening defined to be fitted with a dowel bar 11 on one side thereof, and a sealing cap 13 is installed on the other side thereof, and a spring 14 is installed inside the dowel bar 11 ( 11) When the cap 12 is covered, the spring 14 is positioned between the end of the dowel bar 11 and the sealing cap 13, thereby freeing the left and right stretching of the concrete retaining wall structure. Antirust paint 2 or tape treatment was performed from the outer periphery of the dowel bar 11 adjacent to 12 to the center to prevent rainwater from entering and at the same time to prevent the structure from stretching up and down.

When the expansion joint (1) consisting of the dowel bar 11, the cap 12 and the spring 14 is configured as described above, the expansion joint (1) is fixed to the preformed formwork (5) or rebar and the formwork (5). The concrete 4 is poured into the inside, and after the concrete 4 is solidified, the form 5 is removed and the expansion joint 3 is installed in the space between the retaining walls.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention frees the left and right activities of the concrete retaining wall according to the temperature change by installing a spring between the dowel bar and the sealing cap, and also prevents the inflow of rainwater by performing antirust paint or tape treatment on the portion where the conventional cap is installed. It prevents the occurrence of rust and prevents the cracking and the destruction of the structure caused by the temperature change of the retaining wall structure and the culvert by blocking the vertical expansion and contraction of the structure, thereby improving the durability and quality and reducing the material.

Claims (2)

Retaining Wall Expansion Joint Using Dowel Bar and Cap, An opening is formed at one side and a sealing cap 13 is installed at the other side, and a cap 12 having a spring 14 installed therein is installed at one end of the dowel bar 11; Forming an expansion joint (1) by treating the outer periphery of the dowel bar (11) with antirust paint (2); Fixing one side of the expansion joint 1 to one of the retaining wall units and the other side of the expansion joint 1 to a form 5 or reinforcing bar to be embedded to another retaining wall unit; Pouring concrete 4 into the formwork 5 to form a retaining wall; Retaining wall expansion joint construction method using a dowel bar and a cap, characterized in that the expansion joint (3) between the retaining wall unit after the formwork is removed. The method of claim 1, Retaining wall expansion joint construction method using the dowel bar and the cap, characterized in that the construction by the tape treatment on the outer surface of the dowel bar (11).