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KR-20260065233-A - The expansion joint device with foreign matter blocking and drainage functions

KR20260065233AKR 20260065233 AKR20260065233 AKR 20260065233AKR-20260065233-A

Abstract

The present invention relates to an expansion joint device equipped with foreign substance blocking and drainage functions, developed to be installed in the expansion joint of a bridge to prevent water, including rainwater, from flowing into and affecting the concrete structure while blocking the inflow of foreign substances other than water; comprising: non-shrink concrete poured after the deck is installed in a space including the upper corners on both sides where different decks of the bridge or a deck and an abutment face each other and are spaced apart; a vertical plate having a horizontal plate shape with interlocking protrusions and grooves inserted in an alternating manner in mutually facing directions, vertically installed on the bottom surface and extending downward, and a pair of finger plates having a plurality of anchor rods extending horizontally from one side of the vertical plate with the outer diameter of the end expanded, which are embedded and fixed in the non-shrink concrete together with the anchor rods, excluding the mutually facing surfaces of the vertical plate; The present invention relates to an expansion joint device having a foreign matter blocking and drainage function, characterized by comprising a drainage plate having a drainage portion formed concavely in the lower part, a horizontal contact portion extending horizontally from the upper part of the drainage portion to opposite sides and having an upper surface in close contact with the lower surface of the finger plate, and an upper slide piece located at the upper part and a lower slide piece located at the lower part extending horizontally from the upper part of the drainage portion in a direction facing each other and in close contact in an alternating manner.

Inventors

  • 이현준

Assignees

  • 이현준

Dates

Publication Date
20260508
Application Date
20241101

Claims (12)

  1. Non-shrink concrete (11) poured after mounting the deck (100) in a space including the upper corners on both sides where the deck (100) and the abutment face each other and are spaced apart from each other; A pair of finger plates (12) having a horizontal plate shape, with protrusions and grooves interlocking in mutually facing directions and inserted in an alternating manner, a vertical plate (121) vertically installed on the bottom surface and extending downward, and a plurality of anchor rods (122) extending horizontally from one side of the vertical plate (121) with the outer diameter of the end expanded, and embedded and fixed in the non-shrink concrete (11) together with the anchor rods (122), excluding the mutually facing surfaces of the vertical plate (121); An expansion joint device having foreign matter blocking and drainage functions, characterized by comprising: a drainage portion (131) formed concavely in the lower part; a horizontal contact portion (132) that extends horizontally from the upper part of the drainage portion (131) to opposite sides and has its upper surface in close contact with the lower surface of the finger plate (12); and a drainage plate (13) having an upper slide piece (133) located at the top and a lower slide piece (134) located at the bottom that extend horizontally from the upper part of the drainage portion (131) in a direction facing each other and are in close contact in an alternating manner.
  2. In paragraph 1, The above-mentioned drainage plate (13) is further characterized by having a fixing piece (135) that is fixed by a fixing bolt (135a) that extends vertically downward from the end of the horizontal contact portion (132) and penetrates the vertical plate (121), thereby providing an expansion joint device having foreign matter blocking and drainage functions.
  3. In paragraph 1, An expansion joint device having foreign matter blocking and drainage functions, characterized in that the upper slide piece (133) is integrally formed with a guide piece (133a) that is spaced downward and extends horizontally, so that the lower slide piece (134) is inserted between the upper slide piece (133) and the guide piece (133a).
  4. In paragraph 3, An expansion joint device having foreign matter blocking and drainage functions, characterized by having a plurality of vertically penetrating ventilation holes (133b) in the guide piece (133a).
  5. In paragraph 3, An expansion joint device having foreign matter blocking and drainage functions, characterized in that either the bottom surface of the lower slide piece (134) or the guide piece (133a) has a plurality of friction-preventing ribs (133c) that protrude and extend in the sliding direction.
  6. In paragraph 3, the expansion joint device having foreign matter blocking and drainage functions is characterized in that either the bottom surface of the lower slide piece (134) or the guide piece (133a) has a plurality of friction-preventing protrusions (133d) that protrude in a hemispherical shape.
  7. In Paragraph 3, An expansion joint device having foreign matter blocking and drainage functions, characterized in that a first elastic support rib (133e) is formed at the inner corner where the guide piece (133a) and the drainage part (131) are connected, protruding inwardly in a concave arc shape to allow elastic restoring force to act on the sagging of the guide piece (133a).
  8. In paragraph 2, An expansion joint device having foreign matter blocking and drainage functions, characterized in that the horizontal contact portion (132) and the fixing piece (135) are formed in a shape bent at an obtuse angle greater than 90°, and a second elastic support rib (133f) is provided between the horizontal contact portion (132) and the fixing piece (135) in a concave arc shape protruding inwardly so that the horizontal contact portion (132) is configured to adhere to the bottom surface of the finger plate (12) with elastic restoring force.
  9. In paragraph 1, An expansion joint device having foreign matter blocking and drainage functions, characterized by additionally having a protruding contact part (133g) formed such that the upper surface of the upper and lower slide pieces (133, 134) protrudes vertically in correspondence with the shape of the groove of the finger plate (12) and adheres to the inner surface of the groove, and the height of the protrusion decreases as it moves from the inner end of the groove to the outer side, and the height decreases as it moves further away from the inner surface of the groove.
  10. In paragraph 1, An expansion joint device having foreign matter blocking and drainage functions, characterized by having one or more wafer ribs (133h) that protrude upward on the upper surface of the lower slide piece (134), become narrower in width as they go upward, and extend in a direction perpendicular to the slide direction.
  11. In paragraph 1, An expansion joint device having foreign matter blocking and drainage functions, characterized in that a porous sound-absorbing material (14) is installed between the spaced vertical plates (121) of the mutually interlocking finger plates (12).
  12. In Paragraph 11, An expansion joint device having foreign matter blocking and drainage functions, characterized in that the upper end of the sound-absorbing material (14) is configured to be in close contact with the lower end of the drainage portion (131) to prevent sagging of the drainage portion (131).

Description

Expansion joint device with foreign matter blocking and drainage functions The present invention relates to an expansion joint device equipped with foreign substance blocking and drainage functions. More specifically, it relates to an expansion joint device equipped with foreign substance blocking and drainage functions developed to be installed in the expansion joint of a bridge to prevent water, including rainwater, from flowing into and affecting the concrete structure, while blocking the inflow of foreign substances other than water. In general bridge structures, a deck is formed on top of the piers. Since this deck is quite long, measuring tens of meters in length, the change in length caused by expansion and contraction due to temperature changes is significant. Accordingly, a structure is provided in which bridge supports are installed on top of the piers and the deck is placed on top of them to reduce the impact of the deck's expansion and contraction on the piers. In addition, finger plates with interlocking comb or sawtooth shapes are installed as a post-construction step to prevent damage caused by tight pressure during expansion and contraction, while also allowing safe movement of the upper section by creating a gap between the decks and between the decks and the abutments at the ends of the bridge. In this case, if water, including rainwater, flows into these expansion joints, the water-absorbing properties of cement can cause corrosion of internal rebar or deterioration of the concrete due to repeated moisture absorption, thereby reducing the durability of the bridge structure. In particular, during the winter, the durability of the water-soaked cement rapidly deteriorates as it repeatedly freezes and thaws. Accordingly, to drain water flowing into the space between the finger plates, a 'U'-shaped drain plate made of rubber or metal was installed to discharge it to both sides, thereby solving this problem. However, in addition to water, various foreign substances and sand also enter through the expansion joint and accumulate inside, and as the amount of these foreign substances gradually increases, problems arise that hinder the smooth drainage of water. For expansion joints with degraded or damaged functionality, a method is currently applied in which the subsequently constructed concrete section is cut and removed, and the entire expansion joint device is replaced; however, this method has the disadvantage of requiring excessive time and cost for repairs. FIG. 1 is a cross-sectional view according to an embodiment of the present invention. FIG. 2 is a perspective view showing a finger plate and a drainage plate according to an embodiment of the present invention. FIG. 3 is a conceptual diagram according to an embodiment of the present invention. FIG. 4 is a perspective view showing a drainage plate according to a first enlarged embodiment of the present invention. FIG. 5 is a perspective view showing a drainage plate according to a second enlarged embodiment of the present invention. FIG. 6 is a cross-sectional view according to a third enlarged embodiment of the present invention. FIG. 7 is a perspective view showing a drainage plate according to a fourth enlarged embodiment of the present invention. FIG. 8 is a conceptual diagram showing a drainage plate according to a fourth expanded embodiment of the present invention. Accordingly, the configuration of the present invention is described in detail below with reference to the attached drawings so that those skilled in the art can easily understand and reproduce it. FIG. 1 is a cross-sectional view according to an embodiment of the present invention, FIG. 2 is a perspective view showing a finger plate and a drainage plate according to an embodiment of the present invention, FIG. 3 is a conceptual diagram according to an embodiment of the present invention, wherein non-shrink concrete (11) is poured after mounting a deck plate (100) in a space including two upper corners on each side that are spaced apart from each other and face each other, or between a deck plate (100) and an abutment; A pair of finger plates (12) having a horizontal plate shape, with protrusions and grooves interlocking in mutually facing directions and inserted in an alternating manner, a vertical plate (121) vertically installed on the bottom surface and extending downward, and a plurality of anchor rods (122) extending horizontally from one side of the vertical plate (121) with the outer diameter of the end expanded, and embedded and fixed in the non-shrink concrete (11) together with the anchor rods (122), excluding the mutually facing surfaces of the vertical plate (121); An expansion joint device (1) having a foreign matter blocking and drainage function is shown, characterized by comprising a drainage portion (131) formed concavely in the lower part, a horizontal contact portion (132) that extends horizontally from the upper part of the drainage portion (131) to o