Novel protective cover for reducing tidal bore load of bridge span structure

Abstract

The utility model discloses a novel protective cover for reducing tidal bore load of a bridge span structure, which belongs to the field of bridge hydrodynamic force and comprises a cover body, an inner side truss supporting structure and a protective plate. The cover body is connected with the inner side truss supporting structure and the protection plate. The protective cover solves the problem that certain risks are brought to bridge safety when an existing protective cover resists tsunami impact.

Description

Technical Field

[0001] The utility model belongs to the field of bridge hydrodynamics, and particularly relates to a novel protective cover for reducing the tidal bore load of a bridge span structure. Background Technique

[0002] Affected by climate and geographical conditions, tidal bores are likely to occur in port cities, with a relatively high risk of tidal bores; dam-break surge waves usually occur after the collapse of reservoir dams or river levees. In particular, coastal cities and island areas near the earthquake source are prone to tsunami surge waves. The flow fields of the four types of disasters mentioned in this paragraph, namely flood disasters, tidal bores, dam-break surge waves, and tsunami surge waves, are similar, and the loads acting on bridges are also similar.

[0003] Research shows that the presence or absence of a protective cover has a great impact on whether the upper structure is damaged and the degree of damage. However, the current protective cover has a relatively low protection performance and a poor effect of reducing horizontal and vertical impact forces. Even after installing the protective cover, there is still a risk that the bridge will be damaged by the impact of the tidal bore. Therefore, the existing protective cover is not a favorable solution. Content of the Utility Model

[0004] Aiming at the above deficiencies in the prior art, a novel protective cover for reducing the tidal bore load of a bridge span structure provided by the utility model solves the problem that the existing protective cover will bring certain risks to the safety of the bridge when resisting the impact of the tidal bore.

[0005] In order to achieve the above object, the technical solution adopted by the utility model is: a novel protective cover for reducing the tidal bore load of a bridge span structure, comprising a cover body, an inner truss support structure, and a protective plate; the cover body is respectively connected to the inner truss support structure and the protective plate.

[0006] The beneficial effect of the utility model is: the protective cover in the utility model is closely attached to the bridge as a whole, increasing the contact area between the protective cover and the bridge, achieving the purpose of the cover body and the bridge bearing force together. The protective cover first changes the cross-sectional form of the bridge to reduce the force on the bridge and increase the safety of the bridge.

[0007] Further, the cover body is a six-sided hollow cylinder; the six-sided hollow cylinder includes an arc surface, a first connecting surface, a second connecting surface, a third connecting surface, a fourth connecting surface, and a fifth connecting surface; both sides of the arc surface are respectively connected to one side of the first connecting surface and one side of the second connecting surface; the central angle corresponding to the arc surface is 120°; the first connecting surface is vertically downward; the extension line of the first connecting surface and the other side of the second connecting surface are on the same vertical line; the other side of the first connecting surface is connected to one side of the third connecting surface; the third connecting surface is in the horizontal direction; the other side of the second connecting surface is connected to one side of the fourth connecting surface; the fourth connecting surface is parallel to the third connecting surface; the other side of the third connecting surface is connected to one side of the fifth connecting surface; the other side of the fifth connecting surface is connected to the middle section of the fourth connecting surface; the combined cross-section of the third connecting surface, the fourth connecting surface, and the fifth connecting surface is trapezoidal.

[0008] The beneficial effect of the above further solution is that the cover body adopts a hollow structure and the installation method adopts symmetrical installation upstream and downstream, which greatly reduces the overall weight of the protective cover and will not cause excessive eccentric moment to the bridge due to the weight, thus preventing hazards such as the overturning of the bridge.

[0009] Further, there are several fixing holes on the third connecting surface; a fixing plate is connected to the first connecting surface; the fixing plate is parallel to the third connecting surface and has the same width; there are several fixing holes on the fixing plate; there are several fixing holes on the panel of the fourth connecting surface outside the cavity of the six-sided hollow cylinder; several drainage holes are evenly distributed on the fourth connecting surface; the number of fixing holes on the third connecting surface, the fixing plate, and the fourth connecting surface is the same and they are in one-to-one correspondence on the same horizontal line.

[0010] The beneficial effect of the above further solution is that the fixing holes can make the side of the protective cover closely fit with the bridge to achieve common force; the cover body is reserved with drainage holes, which are evenly distributed in the bottom thickness layer of the cover body, and can effectively drain water and prevent seawater backflow, preventing the hazards caused by the increase in self-weight due to the water ingress of the cover body.

[0011] Further, the inner truss support structure includes several sections of fiberglass materials connected to each other, and the ends of each fiberglass material are connected to the inner wall of the cover body through fiberglass adhesive.

[0012] The beneficial effect of the above further solution is that the inner truss support structure is connected to the cover body through fiberglass adhesive. By connecting in this way, the ability of the cover body to resist the impact of tidal bores is increased, and at the same time, the safety of the bridge is also increased.

[0013] Further, utilize the fixing holes on the fixing plate, the third connection surface and the fourth connection surface, install the protective cover on the bridge through bolts, and fix the bolts with nuts; install a protective plate on the nuts of the fixing plate.

[0014] The beneficial effect of the above further solution is that the side of the protective cover can be closely attached to the bridge by using the fixing holes to achieve common force bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present utility model.

[0016] Figure 2 It is a schematic diagram of the bridge in the embodiment of the present utility model.

[0017] Figure 3 It is a front view of installing the protective cover in the embodiment of the present utility model.

[0018] Figure 4 It is a top side view of installing the protective cover in the embodiment of the present utility model.

[0019] Figure 5 It is a top side view of the installation bolt in the embodiment of the present utility model.

[0020] Figure 6 It is a bottom side view of the installation bolt in the embodiment of the present utility model.

[0021] Figure 7 It is a schematic diagram of installing the protective plate in the embodiment of the present utility model.

[0022] Wherein, 1 is the central angle; 2 is the cover body; 201 is the arc surface; 202 is the first connection surface; 203 is the second connection surface; 204 is the third connection surface; 205 is the fourth connection surface; 206 is the fifth connection surface; 3 is the first set of fixing holes; 4 is the second set of fixing holes; 5 is the third set of fixing holes; 6 is the drain hole; 7 is the inner truss support structure; 8 is the fourth set of fixing holes on the bridge; 9 is the installation shaft group of the bridge; 10 is the protective plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following describes the specific embodiments of the present utility model to facilitate those skilled in the art of this technology to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of this technology, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present utility model are within the scope of protection.

[0024] As Figure 1As shown, in an embodiment of the present utility model, a novel protective cover for reducing the tidal bore load of a bridge span structure includes a cover body 2, an inner truss support structure 7, and a protective plate 10; the cover body 2 is respectively connected to the inner truss support structure 7 and the protective plate 10.

[0025] In this embodiment, in order to increase the ability of the bridge to resist tidal bore impact, a novel protective cover is proposed to unload the force generated by the impact of the tidal wave on the bridge under the action of the tidal bore, thereby reducing the force received by the bridge.

[0026] In this embodiment, as Figure 1 shown, it includes a central angle 1 of 120°, including a cover body 2 and an inner truss support structure 7. The cover body 2 is made of fiberglass, and the cover body 2 is in a form with both ends not closed and hollow inside. The cover body 2 has a first set of fixing holes 3, a second set of fixing holes 4, and a third set of fixing holes 5, and at the same time, drainage holes 6 are reserved; the inner truss support structure 7 is made of steel material, and each steel in the inner truss support structure 7 is connected by a fiberglass adhesive. The inner truss support structure 7 is made of fiberglass material and is also connected to the cover body 2 by a fiberglass adhesive. Using a fiberglass adhesive for connection can provide a uniform force distribution, make the connection more firm, can eliminate or reduce stress concentration at the connection, and can achieve seamless connection, improving the appearance aesthetics.

[0027] The cover body 2 is a six-sided hollow cylinder; the six-sided hollow cylinder includes an arc surface 201, a first connection surface 202, a second connection surface 203, a third connection surface 204, a fourth connection surface 205, and a fifth connection surface 206; both sides of the arc surface 201 are respectively connected to one side of the first connection surface 202 and one side of the second connection surface 203; the central angle corresponding to the arc surface 201 is 120°; the first connection surface 202 is vertically downward; the extension line of the first connection surface 202 and the other side of the second connection surface 203 are on the same vertical line; the other side of the first connection surface 202 is connected to one side of the third connection surface 204; the third connection surface 204 is in the horizontal direction; the other side of the second connection surface 203 is connected to one side of the fourth connection surface 205; the fourth connection surface 205 is parallel to the third connection surface 204; the other side of the third connection surface 204 is connected to one side of the fifth connection surface 206; the other side of the fifth connection surface 206 is connected to the middle section of the fourth connection surface 205; the combined cross-section of the third connection surface 204, the fourth connection surface 205, and the fifth connection surface 206 is trapezoidal.

[0028] In this embodiment, as Figure 2 、 Figure 3 and Figure 4As shown, the central axes of the first set of fixing holes 3, the second set of fixing holes 4 coincide with the central axis of the fourth set of fixing holes 8 on the bridge, and the third set of fixing holes 5 should fit tightly with the installation shaft group 9 of the bridge.

[0029] There are several fixing holes on the third connecting surface 204; a fixing plate is connected to the first connecting surface 202; the fixing plate is parallel to the third connecting surface 204 and has the same width; there are several fixing holes on the fixing plate; there are several fixing holes on the fourth connecting surface 205 located on the panel outside the cavity of the six-sided hollow cylinder; several drain holes 6 are evenly distributed on the fourth connecting surface 205; the number of fixing holes on the third connecting surface 204, the fixing plate and the fourth connecting surface 205 is the same and they are in one-to-one correspondence on the same horizontal line.

[0030] The inner truss support structure 7 includes several sections of fiberglass materials connected to each other, and the ends of each fiberglass material are connected to the inner wall of the cover body 2 through fiberglass adhesives.

[0031] Using the fixing holes on the fixing plate, the third connecting surface 204 and the fourth connecting surface 205, the protective cover is installed on the bridge through bolts, and the bolts are fixed with nuts; a protective plate 10 is installed on the nuts of the fixing plate.

[0032] In this embodiment, as Figure 5 、 Figure 6 and Figure 7 shown, bolts are installed and fixed on the aligned first set of fixing holes 3, the second set of fixing holes 4 and the fourth set of fixing holes 8 on the bridge, and nuts are installed and fixed on the third set of fixing holes 3 and the installation shaft group 9 of the bridge; a protective plate 10 is installed on the already installed bolts, which can not only effectively prevent the bolts from being corroded but also increase the aesthetics.

[0033] The bridge model with this protective cover installed and the bridge model with other types of protective covers installed are placed in a water tank to simulate the impact of surges. Simulations are carried out with various water depths. The simulation data of the impact of surges shows that this protective cover reduces the impact force by about 62% on average, while other types of protective covers reduce the impact force by 25% - 40% on average. Through data comparison, it can be seen that the effect of this protective cover in reducing the impact force is better than that of the existing protective covers.

[0034] The utility model installs an upper arc protective cover on the outside of the bridge, which is simple to operate and convenient to use. At the same time, it meets the requirements of high strength, corrosion resistance, low cost, long life, etc. of the protective cover, has excellent performance, greatly reduces the overall weight, realizes lightweight, does not cause harm to the bridge during normal use, and at the same time, when floods or tidal bores occur, it resists the impact force caused by the impact of surges and reduces the risk of horizontal movement of the bridge.

Claims

1. A new type of protective cover for reducing tidal surge loads on bridge span structures, characterized in that: It comprises a cover body (2), an inner truss support structure (7) and a protective plate (10); the cover body (2) is connected to the inner truss support structure (7) and the protective plate (10) respectively.

2. The novel protective cover for reducing tidal surge loads on bridge span structures according to claim 1 is characterized in that: The cover body (2) is a six-sided hollow cylinder; the six-sided hollow cylinder comprises an arc surface (201), a first connecting surface (202), a second connecting surface (203), a third connecting surface (204), a fourth connecting surface (205) and a fifth connecting surface (206); the two sides of the arc surface (201) are respectively connected to one side of the first connecting surface (202) and one side of the second connecting surface (203); the central angle corresponding to the arc surface (201) is 120°; the first connecting surface (202) is vertically downward; the extension line of the first connecting surface (202) and the other side of the second connecting surface (203) are on the same vertical line; The other side of a connecting surface (202) is connected to one side of a third connecting surface (204); the third connecting surface (204) is in the horizontal direction; the other side of the second connecting surface (203) is connected to one side of a fourth connecting surface (205); the fourth connecting surface (205) is parallel to the third connecting surface (204); the other side of the third connecting surface (204) is connected to one side of a fifth connecting surface (206); the other side of the fifth connecting surface (206) is connected to the middle section of the fourth connecting surface (205); and the combined cross-section of the third connecting surface (204), the fourth connecting surface (205) and the fifth connecting surface (206) is a trapezoid.

3. The novel protective cover for reducing tidal surge loads on bridge span structures according to claim 2 is characterized in that: The third connection surface (204) has a plurality of fixing holes; the first connection surface (202) is connected to a fixing plate; the fixing plate is parallel to the third connection surface (204) and has the same width; the fixing plate has a plurality of fixing holes; the fourth connection surface (205) is located on a panel outside the cavity of the six-sided hollow cylinder and has a plurality of fixing holes; the fourth connection surface (205) has a plurality of drainage holes (6) evenly distributed; the number of fixing holes on the third connection surface (204), the fixing plate and the fourth connection surface (205) is the same and corresponds one to one on the same horizontal line.

4. The novel protective cover for reducing tidal surge loads on bridge span structures according to claim 1 is characterized in that: The inner truss support structure (7) comprises a plurality of sections of glass fiber reinforced plastics that are connected to each other, and the ends of the glass fiber reinforced plastics are connected to the inner wall of the cover body (2) through glass fiber reinforced plastic adhesive.

5. The novel protective cover for reducing tidal surge loads on bridge span structures according to claim 3 is characterized in that: The protective cover is mounted on the bridge by bolts using the fixing holes on the fixing plate, the third connecting surface (204) and the fourth connecting surface (205), and the bolts are fixed by nuts; and the protective plate (10) is mounted on the nuts of the fixing plate.

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