KR-102961658-B1 - Shear-Reinforced Bridge Bearing Structure with Anti-Loosening and Corrosion-Resistant Bolts

KR102961658B1KR 102961658 B1KR102961658 B1KR 102961658B1KR-102961658-B1

Abstract

The present invention relates to a shear-reinforced bridge bearing structure having bolt loosening and corrosion prevention functions, comprising: an anchor socket installed embedded in the substructure of a bridge; a bridge bearing base plate installed above the anchor socket; an anchor bolt that fixes the bridge bearing base plate to the anchor socket; and a ring-shaped inner socket installed on the outer side of the anchor bolt. The anchor bolt comprises a bolt head, a first threaded portion formed by a screw on the lower side of the bolt head, and a second threaded portion located below the first threaded portion, having a diameter smaller than that of the first threaded portion and a screw direction opposite to that of the first threaded portion. The inner socket is installed across the bridge bearing base plate and the anchor socket, and its outer side is formed to fit a hole formed in the bridge bearing base plate and the anchor socket. Its inner side is screw-coupled to the first threaded portion of the anchor bolt, and the second threaded portion of the anchor bolt is screw-coupled to the anchor socket. In this invention, a high-strength inner socket is provided on the outer side of the anchor bolt, thereby preventing breakage of the anchor bolt and significantly increasing shear resistance, and since the inner socket is screw-coupled to the anchor bolt, there is no gap between the inner socket and the anchor bolt, enabling robust support.

Inventors

김학군
송주엽

Assignees

주식회사 두드림테크

Dates

Publication Date: 20260511
Application Date: 20250715

Claims (11)

Anchor socket embedded in the substructure of a bridge; A bridge support plate installed on the upper side of the above anchor socket; An anchor bolt for securing the above bridge support plate to the above anchor socket; It includes a ring-shaped inner socket installed on the outer side of the anchor bolt; The above anchor bolt includes a bolt head, a first threaded portion formed as a screw on the lower side of the bolt head, and a second threaded portion on the lower side of the first threaded portion that has a smaller diameter than the first threaded portion and a screw direction opposite to that of the first threaded portion. The inner socket is installed across the bridge support base plate and the anchor socket, the outer side is formed to fit the hole formed in the bridge support base plate and the anchor socket, and the inner side is screw-coupled to the first threaded portion of the anchor bolt. The second threaded portion of the above anchor bolt is screw-coupled to the above anchor socket, and It further includes a washer nut installed between the bolt head of the anchor bolt and the inner socket and screw-coupled to the first threaded portion, The apparatus further includes a bolt cap covering the bolt head of the anchor bolt, wherein the bolt cap includes a main body covering the bolt head and a cap fixing projection formed on the lower side of the circumference of the main body. The above cap fixing projection is inserted into and fixed in a projection groove formed in the lower plate of the bridge support, and the main body is in close contact with the lower plate of the bridge support. The cap fixing projection is column-shaped and has a large diameter in the middle portion so as to be pressed into the projection groove to prevent withdrawal, or the cap fixing projection is column-shaped and has a wedge-shaped projection on the side, and the projection is caught on the inner side of the projection groove to prevent withdrawal. Shear-reinforced bridge bearing structure with bolt loosening and corrosion prevention functions.
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In claim 1, The above washer nut is characterized by being partially or entirely inserted into a nut groove formed recessed in the lower plate of the bridge bearing. Shear-reinforced bridge bearing structure with bolt loosening and corrosion prevention functions.
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In claim 1, The main body of the bolt cap is provided with a bolt head insertion portion into which the bolt head can be inserted, and the bolt head insertion portion further includes fitting ribs that are spaced apart from each other along the circumferential direction and protrude toward the center, wherein the fitting ribs prevent rotation of the bolt head. Shear-reinforced bridge bearing structure with bolt loosening and corrosion prevention functions.
In claim 7, Characterized by including a washer nut fitting portion provided on the lower side of the fitting ribs of the bolt head insertion portion, into which the washer nut is inserted. Shear-reinforced bridge bearing structure with bolt loosening and corrosion prevention functions.
In claim 1, It further includes a second anchor socket provided on the lower side of the above anchor socket and a connecting bolt that mutually connects the anchor socket and the second anchor socket, The above anchor socket and the second anchor socket are polygonal prisms, characterized in that the vertices and vertices and edges of the polygonal prisms are joined in an offset manner. Shear-reinforced bridge bearing structure with bolt loosening and corrosion prevention functions.
In claim 1, The anchor socket adjustment device further includes a screw-coupled lower side of the anchor socket or the lower side of a second anchor socket coupled to the lower side of the anchor socket, which can adjust the height. Shear-reinforced bridge bearing structure with bolt loosening and corrosion prevention functions.
In any one of claims 1, 3, 7 to 10, A deformable member installed on the upper side of the lower bridge support plate, and a bridge support plate installed on the upper side of the deformable member and simultaneously installed on the lower side of the bridge deck. Shear-reinforced bridge bearing structure with bolt loosening and corrosion prevention functions.

Description

Shear-Reinforced Bridge Bearing Structure with Anti-Loosening and Corrosion-Resistant Bolts The present invention relates to a shear-reinforced bridge bearing structure equipped with bolt loosening and corrosion prevention functions. Specifically, the invention relates to a shear-reinforced bridge bearing structure equipped with bolt loosening and corrosion prevention functions that prevents the loosening and corrosion of anchor bolts connecting the bridge bearing base plate to the substructure of a bridge, while simultaneously significantly improving shear strength against horizontal forces. Bridge bearings, installed between the bridge superstructure—such as the bridge deck—and the bridge substructure—such as piers and abutments—are devices that transmit loads acting from the deck, including vehicles, or the expansion and contraction of the deck due to temperature changes to the substructure; they are essential devices for medium to large bridges. These bridge bearings support the load and absorb displacement or deformation of the deck caused by temperature changes, earthquakes, etc., thereby facilitating the smooth functioning of the bridge and increasing the durability life of the bridge. A typical bridge bearing comprises a bridge bearing top plate installed below the bridge deck, a bridge bearing bottom plate installed above an abutment or pier, and a deformation member provided between the bridge bearing top plate and the bridge bearing bottom plate, wherein the bridge bearing bottom plate is fixed by anchor bolts to an anchor socket embedded above an abutment or pier, which is a bridge substructure. However, conventional bridge bearings have problems such as anchor bolts loosening due to repeated expansion and contraction of the bridge deck caused by temperature changes and vehicle vibrations, anchor bolts failing to adequately support excessive horizontal forces, and anchor bolts easily corroding due to external environmental factors like snow or rain. FIG. 1 is a cross-sectional view of a shear-reinforced bridge bearing structure having bolt loosening and corrosion prevention functions according to an example of the present invention. FIG. 2 is a plan view, a side view, and a partial enlarged view of the bolt cap of the present invention. FIG. 3a is a cross-sectional view and a plan view of the bolt cap of the present invention. FIG. 3b is a cross-sectional view and a plan view of another embodiment of the bolt cap of the present invention. FIG. 4 is a side view of the anchor bolt of the present invention. FIG. 5 is a side view and a top view showing a washer nut coupled to an anchor bolt of the present invention. FIG. 6 is a side view showing a washer nut and an inner socket combined with an anchor bolt of the present invention. FIG. 7 is a plan view, a side view, and a partial enlarged view of another embodiment of the bolt cap of the present invention. FIG. 8 is a cross-sectional view and a plan view of another embodiment of the bolt cap of the present invention. FIG. 9 is a side view and a plan view showing a second anchor socket and an anchor socket adjustment device installed on the lower side of the anchor socket of the present invention. FIG. 10 is a drawing showing the internal view of the anchor socket and the second anchor socket, and the second anchor socket and the anchor socket adjusting device being mutually coupled according to the present invention. Further objects, features, and advantages of the present invention can be more clearly understood from the following detailed description and the accompanying drawings. Before providing a detailed description of the present invention, it should be understood that the present invention is capable of various modifications and may have various embodiments, and that the examples described below and illustrated in the drawings are not intended to limit the present invention to specific embodiments, but rather include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Where it is stated that a component is "connected," "combined," or "joined" to another component, it should be understood that while the component may be directly connected or joined to the other component, another component may exist between each component. The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention; singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Additionally, terms such as "...part," "...unit," and "..