Highway bridge end pavement anti-settlement structure

Abstract

The utility model belongs to the technical field of bridge and highway construction, and discloses a highway bridge end pavement anti-sedimentation structure which is used for being arranged at a highway bridge connecting position and connected with an expansion joint arranged at the position to form a supporting face to be buried at an anchoring foundation on the side to support a foundation on one side of a highway. The expansion joint is provided with an expansion joint body and anchoring steel bars arranged on the two sides of the expansion joint body and comprises a plurality of extension rods, one ends of the extension rods are fixedly connected with the anchoring steel bars of the expansion joint through a plurality of clamping structures, and the clamping structures support the extension rods to keep the extension rods in a horizontal state. A supporting face is formed by a plurality of extension rods arranged at equal intervals, at least one layer of geogrid is placed on the supporting face, and the geogrid is fixedly connected with all the extension rods on the supporting face through binding belts.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge and highway construction, and in particular relates to a road surface settlement prevention structure at the end of a highway bridge. Background Art

[0002] In the prior art, at the junction of the bridge and the highway, the bridgehead jumping phenomenon occurs due to the different settlement of the bridge and the highway. Highway designers and construction units will definitely take into account the settlement factors of the bridge and the highway during the design and construction of the junction of the highway and the bridge. Therefore, during the construction, the natural foundations of the highway and the bridge will be uniformly filled and reinforced. This approach can indeed alleviate the bridgehead jumping phenomenon in the early stage of the highway being built and opened to traffic, but it will cause harm to the subsequent continuous use of the highway. Due to the structural influence of the highway and the bridge, the forces on the bridge and the highway will be different under the same road flux. Such differences will accumulate over a long period of time, and will slowly cause differences in the foundations and fills of the two, and eventually cause another obvious distance difference between the highway and the bridge, which will show that the road surface at the junction of the bridge and the highway is uneven, and the vehicle will not have time to accelerate when it drives here, so the bridgehead jumping phenomenon will naturally occur.

[0003] At the same time, drainage facilities will be installed during the construction of the highway. These facilities can prevent the highway subgrade from being damaged during precipitation. However, if the highway facilities are not perfect or accidentally lost, untimely drainage will cause damage to the highway subgrade and fill. Precipitation will soften the highway subgrade and fill, and passing vehicles will continue to cause the road surface to sink, thereby changing the road surface. These changes will cause uneven road surface at the junction of the bridge and the highway, and will also cause vehicles to jump at the bridge head.

[0004] Since this type of settlement mostly occurs at the connection between the bridge and the end of the highway, and most bridges are box girder structures, the foundation settlement effect of the bridge part is relatively small. However, since the end of the highway is a soft foundation roadbed structure and part of it is a slope, the above two types of settlement are prone to occur in the roadbed part of the end of the highway, resulting in a height difference in the expansion joint here, causing the vehicle to jump. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides an anti-settlement structure for the road surface at the end of a highway bridge. By adapting to the expansion joint structure, a three-dimensional network structure can be formed in the anchor foundation of the expansion joint structure on one side of the road. By increasing the connection area with the foundation soil or concrete structure at that location, the stability is improved, thereby playing a supporting effect on the foundation at that location.

[0006] The technical solution adopted by the utility model is:

[0007] In the first aspect, the utility model provides a road bridge end pavement anti-settling structure, which is used to be arranged at the connection of the highway bridge, connected with the expansion joint arranged at the location to form a support surface, buried in the anchor foundation on the side to form support for the foundation on one side of the highway, the expansion joint has an expansion joint body and anchor steel bars arranged on both sides of the expansion joint body, including a plurality of extension rods, one end of the extension rod is fixedly connected to the anchor steel bars of the expansion joint through a plurality of clamping structures, and the extension rod is supported by the clamping structure to maintain a horizontal state;

[0008] A supporting surface is formed by a number of extension rods arranged at equal intervals, and at least one layer of geogrid is placed on the supporting surface. The geogrid is fixedly connected to all the extension rods on the supporting surface by binding belts.

[0009] In combination with the first aspect, the utility model provides a first implementation manner of the first aspect, wherein the extension rod is a channel steel or threaded steel structure, and a plurality of fixing rings are arranged at equal intervals on the extension rod, and the fixing rings are welded to the extension rod; when the extension rod is arranged at the anchor foundation, a pin is inserted into the fixing ring, and the lower end of the pin rests against the inner bottom surface of the anchor foundation.

[0010] In combination with the first embodiment of the first aspect, the utility model provides a second embodiment of the first aspect, wherein the pins are placed vertically in the anchor foundation and are provided with connecting parts at their lower ends, the connecting parts of all the pins are on the same horizontal plane, and a layer of geogrid connected to the connecting parts of the pins is also provided on the horizontal plane.

[0011] In combination with the first implementation of the first aspect, the utility model provides a third implementation of the first aspect, wherein the surface of the nail has a plurality of thorns, which are placed in the anchor foundation with an inclination angle not less than zero with respect to the vertical direction.

[0012] In combination with the first embodiment of the first aspect, the utility model provides a fourth embodiment of the first aspect, wherein the anchoring steel bar is a U-shaped structure arranged on one side of the expansion joint body, and includes a horizontal portion and a bent portion;

[0013] The clamping structure comprises a horizontal clamping structure arranged on a horizontal part, wherein the horizontal clamping structure has a clamping portion and a connecting extension portion, and the connecting extension portions of several horizontal clamping structures on the same anchoring steel bar all extend to the same side and are welded to the surface of the extension rod.

[0014] In combination with the fourth embodiment of the first aspect, the utility model provides a fifth embodiment of the first aspect, wherein the clamping portion comprises at least two arc-shaped sheets, and a plurality of arc-shaped sheets are closed and fitted on the same surface of the anchor steel bar to form a tubular structure, and the gaps between the arc-shaped sheets are filled and connected by welding, and the connecting extension portion is a structure in which any arc-shaped sheet extends outward as a whole.

[0015] In combination with the fourth embodiment of the first aspect, the utility model provides a sixth embodiment of the first aspect, wherein the clamping structure also includes a bend clamping structure arranged at the bend, and the bend clamping structure and the horizontal clamping structure extend toward the same side and are welded to the outer surface of the extension rod.

[0016] The beneficial effects of the utility model are:

[0017] (1) The utility model cooperates with the expansion joint structure to form a large-area mesh structure in the anchor foundation on the side of the expansion joint close to the road, which can not only increase the connection stability of the foundation at that location and prevent the displacement of other foundations caused by the settlement of a single foundation due to rain impact or other reasons, but also form a better connection state with the expansion joint structure, thereby further improving the stability of the foundation at that location;

[0018] (2) The utility model forms a three-dimensional mesh skeleton through the structural design of ground nails and multi-layer geogrids. Compared with the structure of directly using steel bars to weave mesh boxes, the utility model has lower cost, less difficulty in layout, and is easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a side view of the entire settlement structure in the embodiment of the utility model arranged on one side of the expansion joint road;

[0020] Figure 2 It is a rear view of the entire settlement structure in the embodiment of the utility model arranged on one side of the expansion joint road;

[0021] Figure 3 It is a top view of the entire settlement structure in the embodiment of the utility model arranged on one side of the expansion joint road;

[0022] Figure 4 It is an axonometric diagram of the entire settlement structure in the embodiment of the utility model arranged on one side of the expansion joint road;

[0023] Figure 5 This utility model Figure 4 A is a partial enlarged schematic diagram in FIG.

[0024] In the figure: 1- expansion joint body, 2- anchor steel bar, 3- extension rod, 4- nail, 5- geogrid, 6- horizontal clamping structure, 7- bend clamping structure. DETAILED DESCRIPTION

[0025] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of this application, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0030] In addition, if the terms "horizontal" or "vertical" appear in the description of this application, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] This embodiment discloses a road bridge end pavement anti-settling structure, which is used to be set at the connection between the road and the bridge, and the connection is provided with an expansion joint structure, that is, a metal joint structure provided between two beam ends, between the beam end and the abutment, or at the hinged position of the bridge to meet the requirements of bridge deck deformation. The expansion joint can freely expand and contract in two directions parallel and perpendicular to the bridge axis, and is firm and reliable.

[0034] In this embodiment, refer to Figure 1 The left side is the expansion joint structure, including the expansion joint body 1 and the anchoring steel bar 2. The expansion joint body 1 includes two symmetrically arranged metal rods, which are arranged side by side at the joint of the bridge and the road with a certain spacing, and a rubber strip is arranged within the spacing to block the gap.

[0035] The anchoring steel bars 2 are a number of U-shaped or other shaped steel bars arranged on the outside of each metal rod, which facilitate the connection and fixation of the steel bars in the anchoring foundation prepared for installing the expansion joint structure on both sides.

[0036] Reference Figure 2 and Figure 3 The anti-settlement structure in this embodiment is a mesh structure arranged in an anchor foundation on one side of the road and connected to the expansion joint body 1 on the same side. Through its large footprint, it forms a hollow skeleton, which can form a better stable part in the foundation by backfilling soil or concrete structure, thereby improving the anti-settlement performance of the road at that location.

[0037] Reference Figure 4 The anti-settling structure includes a plurality of extension rods 3, one end of which is connected to the anchoring steel bar 2 on the expansion joint structure, and the connection is achieved by a plurality of clamping structures clamped on the anchoring steel bar 2. Since the extension rods 3 are connected to the anchoring steel bar 2, a horizontal placement state is formed by the anchoring steel bar 2, thereby forming a placement plane in the anchor foundation at the location, and at least one layer of geogrid 5 is provided on the placement plane, and the geogrid 5 is fixed to the extension rods 3 by wire tying belts. Since the geogrid 5 is a mesh structure, according to actual needs, the cross intersection near each extension rod 3 is fixed and tied by wire tying belts, and can be reinforced by welding when necessary.

[0038] When the geogrid 5 and the soil body bear the vehicle load and the soil body's own load together, the geogrid 5 can give full play to the shear strength of the soil body, limit the lateral deformation of the soil body, control the lateral displacement of the roadbed fill, and enhance the overall stability of the roadbed and increase the deformation modulus of the roadbed. At the same time, due to the friction between the geogrid 5 and the roadbed fill, the load on the upper part of the roadbed can be redistributed in the structure, thereby reducing the vertical stress carried within the local range of the abutment back to reduce the settlement effect. At the same time, the horizontally spread geogrid 5 itself has a certain elasticity, which will reduce or avoid the accumulation of structural deformation under the repeated action of vehicle dynamic loads. Therefore, the geogrid 5 and the extension rod 3 are set at the end connection of the road and the bridge to form a relatively stable connection state.

[0039] Furthermore, the extension rod 3 is a channel steel or threaded steel structure, and a plurality of fixing rings are arranged at equal intervals on the extension rod 3, and the fixing rings are welded to the extension rod 3; when the extension rod 3 is arranged at the anchor foundation, a pin 4 is inserted into the fixing ring, and the lower end of the pin 4 is against the inner bottom surface of the anchor foundation. The pin 4 is placed vertically in the anchor foundation, and a connecting portion is provided at its lower end, and the connecting portions of all the pins 4 are on the same horizontal plane, and a layer of geogrid 5 connected to the connecting portion of the pin 4 is also provided on the horizontal plane.

[0040] In another embodiment, the surface of the pin 4 has a plurality of spikes, and is placed in the anchor foundation with an inclination angle not less than zero with respect to the vertical direction.

[0041] The anchor steel bar 2 is a U-shaped structure arranged on one side of the expansion joint body 1, which includes a horizontal part and a bent part; the clamping structure includes a horizontal clamping structure 6 arranged on the horizontal part, and the horizontal clamping structure 6 has a clamping part and a connecting extension part. The connecting extension parts of several horizontal clamping structures 6 on the same anchor steel bar 2 all extend to the same side and are welded to the surface of the extension rod 3.

[0042] The clamping part includes at least two arc-shaped sheets, and a plurality of arc-shaped sheets are folded and attached to the surface of the same anchoring steel bar 2 to form a tubular structure. The gaps between the arc-shaped sheets are filled and connected by welding, and the connecting extension part is a structure in which any arc-shaped sheet extends outward as a whole. The clamping structure also includes a bent clamping structure 7 arranged at the bent part, and the bent clamping structure 7 and the horizontal clamping structure 6 extend toward the same side and are welded to the outer surface of the extension rod 3.

[0043] The utility model is not limited to the above optional implementation modes, and anyone can derive other various forms of products under the enlightenment of the utility model. The above specific implementation modes should not be understood as limiting the protection scope of the utility model. The protection scope of the utility model shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A road bridge end pavement anti-settlement structure, which is used to be arranged at the connection of the road bridge, connected with the expansion joint arranged at the connection to form a support surface, which is buried in the anchor foundation to form support for the foundation on one side of the road, the expansion joint comprises an expansion joint body (1) and anchor steel bars (2) arranged on both sides of the expansion joint body (1), and is characterized in that: It comprises a plurality of extension rods (3), one end of the extension rod (3) being fixedly connected to an anchoring steel bar (2) of the expansion joint via a plurality of clamping structures, and the extension rod (3) is supported by the clamping structure to maintain a horizontal state; A support surface is formed by a plurality of extension rods (3) arranged at equal intervals, and at least one layer of geogrid (5) is placed on the support surface. The geogrid (5) is fixedly connected to all the extension rods (3) on the support surface by means of binding belts.

2. The anti-settling structure of the road surface at the end of a highway bridge according to claim 1, characterized in that: The extension rod (3) is a channel steel or threaded steel structure. A plurality of fixing rings are arranged at equal intervals on the extension rod (3). The fixing rings are welded to the extension rod (3). When the extension rod (3) is arranged at the anchor foundation, a pin (4) is inserted into the fixing ring, and the lower end of the pin (4) abuts against the inner bottom surface of the anchor foundation.

3. The anti-settling structure of the road surface at the end of a highway bridge according to claim 2 is characterized by: The pins (4) are placed vertically in the anchor foundation and are provided with connecting parts at their lower ends. The connecting parts of all the pins (4) are located on the same horizontal plane, and a layer of geogrid (5) connected to the connecting parts of the pins (4) is also provided on the horizontal plane.

4. The anti-settling structure for road surface at the end of a highway bridge according to claim 2, characterized in that: The surface of the pin (4) has a plurality of protrusions, and is placed in the anchor foundation at an inclination angle not less than zero with respect to the vertical direction.

5. The anti-settling structure of the road surface at the end of a highway bridge according to claim 2, characterized in that: The anchor steel bar (2) is a U-shaped structure arranged on one side of the expansion joint body (1), and comprises a horizontal portion and a curved portion; The clamping structure comprises a horizontal clamping structure (6) arranged on a horizontal portion, the horizontal clamping structure (6) having a clamping portion and a connecting extension portion, the connecting extension portions of a plurality of horizontal clamping structures (6) on the same anchoring steel bar (2) all extend to the same side and are welded to the surface of the extension rod (3).

6. The anti-settling structure of the road surface at the end of a highway bridge according to claim 5, characterized in that: The clamping portion comprises at least two arc-shaped sheets, and a plurality of arc-shaped sheets are folded and attached to the surface of the same anchoring steel bar (2) to form a tubular structure. The gaps between the arc-shaped sheets are filled and connected by welding, and the connecting extension portion is a structure in which any arc-shaped sheet extends outward as a whole.

7. The anti-settling structure for road surface at the end of a highway bridge according to claim 5, characterized in that: The clamping structure further comprises a bent portion clamping structure (7) arranged at the bent portion, the bent portion clamping structure (7) and the horizontal clamping structure (6) extending towards the same side and being welded to the outer surface of the extension rod (3).

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