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KR-20260067047-A - The expansion joint device with foreign matter blocking and waterproofing functions

KR20260067047AKR 20260067047 AKR20260067047 AKR 20260067047AKR-20260067047-A

Abstract

The present invention relates to an expansion joint device equipped with foreign substance blocking and water-blocking functions, developed to be installed in the expansion joint of a bridge to block water, including rainwater, and various foreign substances from flowing into the expansion joint; 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 foreign matter blocking and water-blocking functions, characterized by comprising a horizontal contact portion in which the upper surface is in close contact with the lower surface of the finger plates on both sides, a curved bend portion formed by a downwardly concave curve between the horizontal contact portions and extending in the longitudinal direction, and a fixing piece that extends vertically downward from the end of the horizontal contact portion and is fixed by a fixing bolt penetrating the vertical plate.

Inventors

  • 노혜심

Assignees

  • 노혜심

Dates

Publication Date
20260512
Application Date
20241105

Claims (7)

  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 water-blocking functions, characterized by comprising a water-blocking plate (13) having a horizontal contact portion (131) in which the upper surface is in close contact with the lower surface of the finger plates (12) on both sides, a curved bend portion (132) formed in a concave curve downward between the horizontal contact portions (131) and extending in the longitudinal direction, and a fixing piece (133) that is fixed by a fixing bolt (133a) extending vertically downward from the end of the horizontal contact portion (131) and penetrating the vertical plate (121).
  2. In paragraph 1, An expansion joint device having foreign matter blocking and water-blocking functions, characterized by having a reinforcing connection part (135) that is integrally connected at a position spaced apart from both ends of the curved bending part (132) and extends downward to form a space spaced apart from the downward convex lower portion of the curved bending part (132).
  3. In paragraph 2, An expansion joint device having foreign matter blocking and water-blocking functions, characterized in that a plurality of spacing ribs (136) are integrally connected at regular intervals between the above-mentioned curved bending portion (132) and the reinforcing connection portion (135).
  4. In paragraph 2, An expansion joint device having foreign matter blocking and water-blocking functions, characterized by having a vertical pressure rib (137) that is vertically integrally connected to the lower center of the curved bend portion (132) and the inner lower part of the reinforcing connection portion (135) and formed to be 1.2 to 1.6 times longer vertically than the recessed depth of the curved bend portion (132).
  5. In paragraph 4, An expansion joint device having foreign matter blocking and water-blocking functions, characterized in that the reinforcing connection part (135) is configured to be connected in a straight line inclined from the bottom of the vertical pressure rib (137) to the upper sides.
  6. In paragraph 5, An expansion joint device having foreign matter blocking and water-blocking functions, characterized in that the lower end of the vertical pressure rib (137) has a horizontal section (137a) that extends horizontally to both sides, and the end of the horizontal section (137a) is connected to a reinforcing connection section (135).
  7. In any one of paragraphs 1 through 6, An expansion joint device having foreign matter blocking and water-blocking functions, characterized in that two or more curved bending sections (132) are formed and a horizontal extension section (134) extending horizontally is formed between adjacent curved bending sections (132).

Description

Expansion joint device with foreign matter blocking and waterproofing functions The present invention relates to an expansion joint device equipped with foreign substance blocking and water-blocking functions. More specifically, it relates to an expansion joint device equipped with foreign substance blocking and water-blocking functions developed to be installed in the expansion joint of a bridge to prevent water, including rainwater, and various foreign substances from entering the expansion joint. 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. Many prior patents have solved this problem by installing a 'U'-shaped drain plate made of rubber or metal to drain water flowing into the space between the finger plates, thereby allowing it to be discharged to both sides. However, basically, bridges are equipped with facilities for water drainage, and only a very small amount of water flows into the expansion joints. Since the water flowing into the expansion joints includes not only water but also various foreign substances including soil and sand, periodic removal of foreign substances is required. Furthermore, if foreign substances clump together and harden, the durability of the drainage plate, especially one made of rubber, decreases rapidly. In addition, a method has been developed and is being used to seal the bottom surfaces of both finger plates with rubber plates to prevent water and foreign substances from entering the lower part of the expansion joint without considering the drainage function. However, the expansion joint basically has a structure in which the gap changes, forming a corrugation similar to the shape of an expansion pipe called a bellows. However, as the length changes as the angle changes at the folded part of the corrugation, a problem arises in which foreign substances, especially those containing water, dry out, clump together, and harden on the surface, making them difficult to remove. In addition, there was a problem in that an additional security structure was required because the area became vulnerable due to the process in which the bent angle continuously changed according to temperature and vibration. 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 showing a state in which the finger plate gap is widened according to an embodiment of the present invention. FIG. 4 is a conceptual diagram showing a state in which the finger plate spacing is narrowed according to an embodiment of the present invention. FIG. 5 is a conceptual diagram according to a first expanded embodiment of the present invention. FIG. 6 is a conceptual diagram according to a second extended embodiment of the present invention. FIGS. 7 and 8 are conceptual diagrams showing the state of the water barrier plate during the process of the finger plate gap widening according to the second expanded embodiment of the present invention. FIG. 9 is a conceptual diagram according to a third extended embodiment of the present invention. FIG. 10 is a cross-sectional view according to a fourth enlarged 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 showing a state in which the finger plate spacing is widened according to an embodiment of the present invention, FIG. 4 is a