阅读说明：本技术 公路桥梁路面无缝伸缩装置 (Seamless telescoping device in public road bridge roof beam road surface ) 是由 朱永发 于 2019-11-26 设计创作，主要内容包括：一种公路桥梁路面无缝伸缩装置,由活动支架,左梁斜支板,右梁斜支板,橡塑盖板和特种路面材料组成；该伸缩装置安装好后,路面没有缝隙,没有钢材零件外露,车辆通过时平坦顺利,无冲击,无噪音,就和在沥青路面正常行驶一样；该伸缩装置性能优良,伸缩量大,结构简单,造价低廉,容易安装,可靠耐用,和钢筋混凝土桥梁或钢架桥梁都可以配套使用。(A road surface seamless expansion device for a highway bridge comprises a movable support, a left beam inclined support plate, a right beam inclined support plate, a rubber plastic cover plate and a special road surface material; after the telescopic device is installed, the road surface has no gap, no steel parts are exposed, the vehicle is flat and smooth when passing, no impact and no noise exist, and the device is the same as that of the vehicle normally running on an asphalt road surface; the telescopic device has the advantages of excellent performance, large telescopic quantity, simple structure, low manufacturing cost, easy installation, reliability and durability, and can be matched with reinforced concrete bridges or steel frame bridges.)

1. The utility model provides a seamless telescoping device in public road bridge roof beam road surface, characterized by: the telescopic device consists of a movable bracket, a left beam inclined support plate, a right beam inclined support plate, a rubber plastic cover plate and a special pavement material; the left beam oblique support plate and the right beam oblique support plate are symmetrically fixed on the left bridge and the right bridge respectively, the fixed left beam oblique support plate and the fixed right beam oblique support plate are in the shape of a large upper opening and a small lower opening, the movable support is placed on the left beam oblique support plate and the right beam oblique support plate, the upper surfaces of the movable support and the left beam oblique support plate are covered with the rubber cover plate, and the middle part of the lower surface of the movable support is a telescopic gap of the left bridge and the right bridge.

2. The seamless expansion device of highway bridge road surface of claim 1, which is characterized in that: the inclined planes of the left and right beam inclined support plates and the horizontal plane have a same included angle A, the included angle A is a value between more than 0 degree and less than 90 degrees, the top ends of the two inclined support plates are the horizontal plane, and a plurality of screws are welded on the plane along the length direction.

3. The seamless expansion device of highway bridge road surface of claim 1, which is characterized in that: the cross section of the movable bracket is a section similar to an isosceles triangle, and the included angles of two equal waist edges and the bottom edge are equal to the angle of the included angle A of the inclined surfaces of the left and right beam inclined support plates; a plurality of screws are welded in the middle of the bottom edge along the length direction.

4. The seamless expansion device of highway bridge road surface of claim 1, which is characterized in that: the width of the rubber-plastic cover plate is the same as the width of the upper parts of the fixed left and right beam oblique supporting plates, holes corresponding to the screws on the left and right beam oblique supporting plates and the movable support are arranged on the rubber-plastic cover plate, and after the rubber-plastic cover plate is tightly pressed by the nuts, the left beam oblique supporting plate, the movable support and the right beam oblique supporting plate are connected together by the rubber-plastic cover plate.

Technical Field

The invention belongs to a matching assembly of a highway bridge, and particularly relates to a seamless expansion device for a highway bridge pavement.

Background

The modern highway bridge is built by pouring reinforced concrete or welding a steel plate section bar into a frame, and the materials have the characteristics of expansion with heat and contraction with cold, so that the upper part of the bridge is matched with a highway bridge expansion device when the bridge is designed and built, and a space is reserved for expansion and contraction deformation of bridge materials. At present, the expansion devices are roughly classified into four types, namely a rubber expansion device which is composed of a rubber plate and a steel plate and is suitable for expansion joints with expansion amount less than 60 millimeters. And the deformed steel single-slit expansion device consists of a steel beam and a rubber sealing belt and is suitable for expansion joints with expansion amount less than 60 millimeters. And the comb plate type telescopic device is formed by butt-joint combination of comb plates made of steel plates and is suitable for expansion joints with expansion amount not greater than 300 millimeters. And fourthly, the modulus type expansion device is formed by combining the section steel center girders and the rubber sealing belts, the expansion amount is increased by increasing the number of the center girders, and the modulus type expansion device is suitable for expansion joints with the expansion amount of 160-2000 mm. After the expansion devices are installed at the upper part of the bridge, gaps and steel parts are exposed on the bridge floor, so that when a vehicle passes through, the expansion devices can impact wheels and generate impact sound, and particularly, vibration and sound generated by impact are serious for a fast-running vehicle and a heavy-duty truck. Some residents living beside the overpass say that when heavy trucks pass through the telescopic device at night, the impact sound energy generated arouses the passengers from sleep, and the decibel of the visible impact sound is high and far exceeds the limit value of the national standard. When a vehicle passes through the comb plate expansion device or the expansion device road surface of a plurality of transverse steel beams, a driver feels that the vehicle and a steering wheel are shaken, and the phenomenon is caused by the exposed gap of the expansion device and the impact of exposed steel parts on the wheels. Therefore, the design of the steel parts which meet the requirement of the bridge expansion and contraction deformation, make the road surface seamless and prevent the expansion and contraction device from being seen changes the defects of the existing expansion and contraction device, really realizes the flatness, smoothness, no sudden jump and no noise when the vehicle runs through the expansion and contraction device, and is expected to be the pursuit target of the innovative design of the bridge expansion and contraction device.

Disclosure of Invention

The invention designs a highway bridge expansion device, which can provide an expansion device with no gap on the road surface and no exposed steel parts on the premise of meeting the expansion deformation of a bridge.

The technical scheme of the invention is as follows: a seamless telescopic device for road surface of highway bridge is composed of movable supporting frame, left and right oblique supporting plates, rubber-plastic cover plate and special road surface material. The left beam inclined support plate and the right beam inclined support plate are symmetrically fixed on the left bridge and the right bridge respectively, the fixed left beam inclined support plate and the fixed right beam inclined support plate are in a shape with a large upper opening and a small lower opening, the movable support is placed on the left beam inclined support plate and the right beam inclined support plate, partial inclined planes on two sides of the movable support are overlapped with the inclined planes of the left beam inclined support plate and the right beam inclined support plate, and the middle part of the lower surface of the movable support is a telescopic gap of the left bridge and the right bridge. The inclined plane of each inclined support plate and the horizontal plane have the same included angle A, the included angle A is a value between 0 degree and 90 degrees, the top ends of the two inclined support plates are the horizontal planes, and a plurality of screws are welded on the planes along the length direction. The cross section of the movable bracket is a section similar to an isosceles triangle, and the included angles of two equal waist edges and the bottom edge are equal to the angle of the included angle A of the inclined surfaces of the left and right beam inclined support plates; a plurality of screws are welded in the middle of the bottom edge along the length direction. After the left beam diagonal support plate and the right beam diagonal support plate are fixed, the plane of the movable support welding screw rod is placed on the left beam diagonal support plate and the right beam diagonal support plate upwards. After the movable support is placed, the rubber plastic cover plate covers the movable support, the width of the rubber plastic cover plate is the same as the width of the upper parts of the left and right beam oblique support plates which are fixed, holes corresponding to the screw rods on the left and right beam oblique support plates and the movable support are arranged on the rubber plastic cover plate, and after the rubber plastic cover plate is tightly pressed by the nuts and the flat pads, the rubber plastic cover plate connects the left beam oblique support plate, the movable support and the right beam oblique support plate. When the asphalt pavement is paved, the special pavement material is paved on the expansion device, the material has large elasticity and good shaping property, has excellent high and low temperature resistance, can extend and shorten along with the expansion change of the bridge, and can keep the pavement basically flat.

After the seamless expansion device for the road surface of the highway bridge is put into use, when the bridge is expanded after the climate temperature is gradually increased, the left beam inclined support plate moves rightwards along with the left bridge, the right beam inclined support plate moves leftwards along with the right bridge, the expansion joint is gradually reduced, the movable support can move upwards particularly slowly and push the special road surface material on the movable support to move upwards, and due to the fact that the special road surface material has plasticity, under the rolling of wheels, part of the special road surface material higher than the road surface can diffuse towards two sides, and the road surface can still keep basically flat. When the bridge contracts after the climate temperature is gradually reduced, the left beam inclined support plate moves leftwards along with the left bridge, the right beam inclined support plate moves rightwards along with the right bridge, the expansion joint gradually becomes larger, the movable support can move downwards particularly slowly, a part of special pavement materials can return under the action of elasticity, and the materials which do not return are repaired and flattened manually, so that the flatness of the pavement can be kept. The telescopic device is buried under a special pavement material, a reserved gap of the telescopic device cannot be seen on the pavement, no steel parts are exposed, and the special pavement material on the telescopic device is flatly connected with the asphalt pavements on two sides, so that a vehicle passing through the telescopic device is flat and smooth, has no impact and no noise, and is just like normally running on the asphalt pavements.

The telescopic device can meet the deformation of the bridge in the longitudinal expansion or contraction of the horizontal plane bridge in a large amount, can also meet the micro deformation of the bridge in the horizontal plane and the vertical plane, and is simple in structure, easy to install, less in maintenance, long in service life and worthy of popularization.

Drawings

FIG. 1 is a schematic cross-sectional view of a seamless expansion device for a highway bridge pavement;

FIG. 2 is a transverse cross-sectional schematic view of a mobile carriage;

FIG. 3 is a transverse cross-sectional view of the left beam diagonal member.

In fig. 1: 1. the special pavement material comprises a movable support, 2 a rubber cover plate, 3 a right beam inclined support plate, 4 a right beam, 5 a gap between the left beam and the right beam, 6 a left beam inclined support plate, 7 a left beam, 8 and special pavement material.

Detailed Description

As shown in the figure, the width of a movable support 1 in the seamless telescopic device of the road surface of the highway bridge in the longitudinal direction of the bridge is determined by combining the calculation of the telescopic quantity, the length in the transverse direction of the bridge can be processed according to the length of about 1 to 3 meters, and a plurality of movable supports are connected to the width of the bridge; the stress condition of the movable support 1 is the same as that of the simply supported beam, so the shape of the movable support is designed to be large in middle size, and the size of the movable support is gradually reduced towards the supporting points at two sides; when in manufacturing, a die is used for forging and pressing out a blank of the movable bracket, and then the inclined plane is cut and processed with an included angle A. The left beam oblique support plate 6 and the right beam oblique support plate 3 are made of steel plate materials with proper thickness, the transverse length of each support plate is the same as that of the movable support 1, the top plane of each support plate is cut at the upper end according to the degree of the included angle A, and the surface attached to the movable support 1 is smooth. The bridge is cast by reinforced concrete materials, a plurality of reinforcing steel bars are welded on the downward surface of the left beam inclined support plate 6 and the right beam inclined support plate 3, the bridge reinforcing steel bars are positioned before the concrete is cast and are welded or bound with the bridge reinforcing steel bars, and the inclined support plates and the bridge form a whole after the concrete is cast; the bridge is formed by welding steel plate profiles, and the left and right beam oblique supporting plates can be directly welded on the bridge after being positioned on the left and right bridges. Then the movable support 1 is placed between the left and right beam oblique support plates, covered with a rubber plastic cover plate 2, and compressed by a nut after a flat cushion is added. Before paving and pressing the asphalt pavement, covering waterproof cloth on the telescopic device, wrapping the end of the telescopic device by the waterproof cloth, paving and pressing a special pavement material 8, and flatly connecting the two sides of the special pavement material with the asphalt pavement; the special pavement material 8 available at the present stage is a pavement material formed by mixing pavement crack pouring polyurethane glue or silicone glue and rubber particles.

After the seamless telescopic device for the road surface of the highway bridge is installed and used, the road surface has no gap, no steel parts are exposed, the connection with the asphalt road surfaces at two sides is flat, the structure is simple, the manufacturing cost is low, the installation is easy, the device is reliable and durable, and the device is popular.