Fabricated intelligent support structure and mounting method

Abstract

The invention discloses an assembly type intelligent support structure which comprises a plurality of rubber layers, a plurality of connecting rods and a plurality of connecting rods. The number of the steel plate layers is multiple, a plurality of piezoelectric film sensors are arranged on one of the steel plate layers along the periphery at equal intervals, and the multiple rubber layers and the multiple steel plate layers are alternately arranged and connected in a bonding mode to form an internal support structure; the cast-in-place rubber layer is an annular rubber layer cast on the periphery of the internal support structure through a casting template; wherein the pouring template is provided with a cable hole for a cable of the piezoelectric film sensor to pass through, and the cable located between the pouring template and the internal support structure is poured in an annular rubber layer. The invention further provides an installation method of the assembly type intelligent support. According to the structure and the mounting method, the pressure distribution in the support can be accurately monitored in real time, the manufacturing structure is simple, and connection is reliable.

Description

Technical Field

[0001] The present invention relates to the field of bridge engineering, and more specifically, to an assembled intelligent bearing structure and an installation method. Background Art

[0002] The bridge structure is generally composed of superstructure, substructure and other auxiliary structures. The support system in the superstructure is the key component connecting the bridge span structure and the substructure, transferring the load of the bridge superstructure to the substructure, and ensuring the free deformation of the bridge under various loads.

[0003] In recent years, with the increase in the service time of bridges, many bridges have gradually reached their design service life, and the proportion of bridge diseases has gradually increased. In actual projects, by investigating the use of bearings, the causes of bridge diseases can be analyzed. The number of bearings is dozens of times the number of bridges, and the technical status of bearings is one of the important indicators reflecting the overall status of bridges. However, bearings are generally located in a narrow position at the bottom of the main beam, and it is difficult to fully observe their conditions by visual inspection. Therefore, there is not much information about the actual condition of bearings during bridge operation. Traditional rubber bearings are widely used in bridge engineering, but their performance monitoring and damage warning capabilities are weak, and it is difficult to meet the safety and intelligence requirements of modern engineering. The current bearings on the market have a low degree of intelligence, and the integration complexity of bearings and monitoring equipment is high. There are problems such as difficult sensor layout, large monitoring data errors, and high maintenance costs. Summary of the invention

[0004] The present invention provides an assembled intelligent support structure and an installation method, which can realize real-time and accurate monitoring of the pressure distribution inside the support, and has a simple manufacturing structure and reliable connection.

[0005] In order to achieve these purposes and other advantages of the present invention, in a first aspect, the present invention provides an assembled intelligent support structure, comprising: a rubber layer, which is provided with multiple layers; The steel plate layer is provided with multiple layers, and a plurality of piezoelectric film sensors are arranged at equal intervals along the periphery above one of the steel plate layers, wherein the multiple rubber layers and the multiple steel plate layers are alternately arranged and bonded to form an internal support structure; A cast-in-place rubber layer, which is an annular rubber layer cast on the periphery of the internal support structure through a casting template; Wherein, a cable hole for the cable of the piezoelectric film sensor to pass through is arranged on the casting template, and the cable between the casting template and the internal support structure is cast in the annular rubber layer.

[0006] Preferably, each rubber layer includes N rubber modules, and each rubber module has an arc-shaped notch at one corner. After the N rubber modules are spliced ​​and bonded, the arc-shaped notches of the N rubber modules are spliced ​​to form a first circular hole; a second circular hole is arranged at the center position of each steel plate layer, and the diameters of the first circular hole and the second circular hole are the same; wherein, after the multiple rubber layers and the multiple steel plate layers are alternately bonded and connected, a grouting hole is formed by the first circular hole and the second circular hole at the center position of the internal support structure, and polyurethane rubber is poured in the grouting hole.

[0007] Preferably, epoxy resin is provided on the surface of each piezoelectric film sensor to encapsulate it, the piezoelectric film sensor is a PVDF piezoelectric film sensor, and the cable of each piezoelectric film sensor is made of polytetrafluoroethylene.

[0008] Preferably, when the rubber layers and the steel plate layers are alternately arranged and bonded together, the rubber layers and the steel plate layers, as well as adjacent rubber layers, are bonded together using cold vulcanized adhesive.

[0009] Preferably, the cross-sections of the rubber layer and the steel plate layer are circular or square, the cross-section of the cast-in-place rubber layer is circular or square, and the cast-in-place rubber layer is a polyurethane rubber layer.

[0010] Preferably, the number N of rubber modules provided in each rubber layer is 2 or 4.

[0011] In a second aspect, the present invention further provides a method for installing an assembled intelligent support, which is applicable to the assembled intelligent support structure, and comprises the following steps: Step S1, bonding and splicing the rubber modules to form a multi-layer rubber layer; Step S2, a plurality of piezoelectric film sensors are arranged above one of the steel plate layers along the periphery at equal intervals; Step S3, alternately bonding the multiple rubber layers and the multiple steel plate layers, the first circular hole on the rubber layer and the second circular hole on the steel plate layer form a grouting hole, and pouring polyurethane rubber into the grouting hole to form an internal support structure; Step S4, arranging a casting template around the internal support structure, and passing the cable of each piezoelectric film sensor through the corresponding cable hole on the casting template; Step S5, pouring polyurethane rubber into the gap between the pouring template and the internal support structure; Step S6: after the polyurethane rubber to be cast is solidified, the casting template is removed, and the cables of each piezoelectric film sensor are checked to see whether they are normal; Step S7: Connect each piezoelectric film sensor to an external data acquisition instrument.

[0012] The present invention has at least the following beneficial effects: First, the present invention arranges a plurality of piezoelectric film sensors at equal intervals along the periphery above one of the steel plate layers, so that the support structure has a pressure monitoring function and can monitor the pressure distribution inside the support in real time and accurately. The size of the arranged piezoelectric film sensor is small, and the influence on the overall force-bearing performance of the support is also small. Since the present invention bonds and connects the multiple layers of the rubber layer and the multiple layers of the steel plate layer to form an internal support structure, and then casts a layer of annular rubber layer on the periphery of the internal support structure through a casting template, that is, a cast-in-place rubber layer, the cast-in-place rubber layer is tightly connected to the internal rubber layer and the steel plate layer to form an integral structure. The arrangement of the cast-in-place rubber layer improves the stability, reliability, and durability of the support structure as a whole. Therefore, the support structure not only realizes the real-time monitoring of the pressure distribution inside the support, but also ensures the complete reliability of the support structure.

[0013] Second, each rubber layer includes N rubber modules. When in use, the N rubber modules are spliced ​​and bonded to form a rubber layer. The modular design makes the split structure of the rubber support easy to transport and install, and is also conducive to the arrangement and fixation of the internal piezoelectric film sensor.

[0014] Third, the rubber layers and the rubber layers and the steel plate layers are connected to each other by cold vulcanized rubber, which is convenient to manufacture, reliable in connection, simple and efficient, and suitable for different engineering environments. After the multiple rubber layers and the multiple steel plate layers are bonded and connected, a grouting hole is formed by the first circular hole and the second circular hole at the center of the internal support structure, and polyurethane rubber is poured in the grouting hole, which further enhances the connection performance between adjacent rubber layers and rubber layers and steel plate layers.

[0015] Fourth, piezoelectric film sensors and external data acquisition instruments provide real-time data on bearing stress, providing a basis for performance safety assessment and early warning of bearings and bridges.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a side structural schematic diagram of the assembled intelligent support structure of the present invention; Figure 2 It is a schematic diagram of the top view of the assembled intelligent support structure of the present invention; Figure 3 It is a structural schematic diagram of the rubber module in the assembled intelligent support structure of the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0019] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0020] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention 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 operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0021] like Figures 1 to 3 As shown, an assembled intelligent support structure provided by an embodiment of the present invention includes: a rubber layer 1, which is provided with multiple layers; a steel plate layer 4, which is provided with multiple layers, and a plurality of piezoelectric film sensors 2 are arranged above one of the steel plate layers 4 at equal intervals along the periphery, wherein the multiple layers of the rubber layer 1 and the multiple layers of the steel plate layer 4 are alternately arranged and bonded to form an internal support structure; a cast-in-place rubber layer 5, which is an annular rubber layer cast on the periphery of the internal support structure by a casting template; wherein a cable hole for the cable 3 of the piezoelectric film sensor 2 to pass through is provided on the casting template, and the cable 3 located between the casting template and the internal support structure is cast in the annular rubber layer.

[0022] In the above embodiment, the number of rubber layers 1 and steel plate layers 4 is not specifically limited, and can be specifically set according to actual conditions. For example, the rubber layer 1 is provided with three layers, and the steel plate layer 4 is provided with two layers. The rubber layer 1 and the steel plate layer 4 are alternately arranged and connected by cold vulcanized adhesive. A plurality of piezoelectric film sensors 2 are arranged on the second steel plate layer 4 below. For example, four piezoelectric film sensors 2 are arranged. The voltage film sensor adopts PVDF piezoelectric film sensor 2. PVDF is the abbreviation of polyvinylidene fluoride. PVDF piezoelectric film sensor 2 has the characteristics of high sensitivity, fast response, wide bandwidth, flexibility and processability. In the specific setting, epoxy resin is arranged on the surface of each of the piezoelectric film sensors 2 to encapsulate it, and the cable 3 of each piezoelectric film sensor 2 is made of polytetrafluoroethylene to improve the durability and anti-interference performance of the piezoelectric film sensor 2. In summary, the piezoelectric film sensor 2 is small in size and has little effect on the overall force performance of the support. Since the present invention adheres multiple layers of the rubber layer 1 and multiple layers of the steel plate layer 4 to form an internal support structure, and then uses a casting template to cast an annular rubber layer on the periphery of the internal support structure, that is, a cast-in-place rubber layer 5. The cast-in-place rubber layer 5 is preferably a polyurethane rubber layer. The cast-in-place rubber layer 5 is tightly connected to the internal rubber layer 1 and the steel plate layer 4 to form an integral structure. The height of the cast-in-place rubber layer 5 is the same as the height of the internal support structure. The provision of the cast-in-place rubber layer 5 improves the stability, reliability and durability of the support structure as a whole. In addition, when a annular rubber layer is cast on the periphery of the internal support structure, that is, the cast-in-place rubber layer 5, the cable 3 of the piezoelectric film sensor 2 needs to be passed through the cable hole provided on the casting template first. During the casting process, it is necessary to ensure that the cable 3 of the piezoelectric film sensor 2 is reasonably laid out and take protective measures to prevent damage. When the cast-in-place rubber layer 5 is solidified, in order to facilitate the disassembly of the casting template, the casting template adopts a detachable casting template. For example, two or three casting templates are used to enclose the internal support structure and fixed with bolts. During the specific operation, the casting template can also be provided with a bottom plate, which is convenient for disassembly after the cast-in-place rubber layer 5 is solidified.

[0023] In one specific embodiment, each rubber layer 1 includes N rubber modules 6, and each rubber module 6 has an arc-shaped notch 8 at one corner. After the N rubber modules 6 are spliced ​​and bonded, the arc-shaped notches 8 of the N rubber modules 6 are spliced ​​to form a first circular hole; a second circular hole is arranged at the center position of each steel plate layer 4, and the diameters of the first circular hole and the second circular hole are the same; wherein, after the multiple layers of the rubber layer 1 and the multiple layers of the steel plate layer 4 are alternately bonded and connected, a grouting hole 7 is formed at the center position of the internal support structure by the first circular hole and the second circular hole, and polyurethane rubber is poured in the grouting hole 7.

[0024] In the above embodiment, the cross-section of the rubber layer 1 and the steel plate layer 4 is circular or square, and the cross-section of the cast-in-place rubber layer 5 is circular or square. When processing the rubber layer 1, the number N of rubber modules 6 set in each rubber layer 1 is 2 or 4, so as to facilitate transportation and the arrangement of the internal pressure film sensor. For example, the cross-section of the rubber layer 1 and the steel plate layer 4 is circular, and the number of rubber modules 6 in each rubber layer 1 is 4. A quarter arc notch 8 is set at the central angle of the rubber module 6. After the four rubber modules 6 are spliced, the four arc notches 8 form the first circular hole. Therefore, when the multiple layers of the rubber layer 1 and the multiple layers of the steel plate layer 4 are spliced ​​and bonded, a grouting hole 7 is formed at the center position of the internal support structure by the first circular hole and the second circular hole, and polyurethane rubber is poured in the grouting hole 7, which further enhances the connection performance between the adjacent rubber layers 1, the rubber layer 1 and the steel plate layer 4.

[0025] Another embodiment of the present invention further provides an installation method of an assembled intelligent support, which is applicable to the assembled intelligent support structure, and comprises the following steps: Step S1 : bonding and splicing the rubber modules 6 to form a multi-layer rubber layer 1 .

[0026] Before the splicing and bonding, the rubber module 6 and the steel plate layer 4 are first prepared, and the PVDF piezoelectric film sensor 2, cold vulcanized adhesive, polyurethane, etc. are also prepared.

[0027] Step S2: a plurality of piezoelectric film sensors 2 are arranged at equal intervals along the periphery above one of the steel plate layers 4, and are encapsulated with epoxy resin.

[0028] Step S3, alternately bonding the multiple layers of the rubber layer 1 and the multiple layers of the steel plate layer 4, the first circular hole on the rubber layer 1 and the second circular hole on the steel plate layer 4 form a grouting hole 7, and pouring polyurethane rubber into the grouting hole 7 to form an internal support structure.

[0029] Step S4, arranging a casting template around the internal support structure, and passing the cable 3 of each piezoelectric film sensor 2 through the corresponding cable hole on the casting template, ensuring that the position of the building template is correct and fixed.

[0030] Step S5, pouring polyurethane rubber into the gap between the casting template and the internal support structure, and properly arranging the cables 3 of the piezoelectric sensor, and using a protective sleeve when necessary to prevent the cables 3 from being damaged during construction.

[0031] Step S6: After the polyurethane rubber to be cast is solidified, the casting template is removed, and the cable 3 of each piezoelectric film sensor 2 is checked to see if it is normal.

[0032] Step S7, connecting each piezoelectric film sensor 2 to an external data acquisition instrument, sampling and analyzing the pressure and its distribution inside the support in real time, and generating a pressure map.

[0033] In the above embodiment, the whole structure is easy to manufacture, simple to splice, reliable to connect, easy to construct, and suitable for different engineering environments. It is also highly safe, and provides real-time force data of the bearing through the piezoelectric film sensor 2 and the external data acquisition instrument, providing a basis for performance safety assessment and early warning of the bearing and the bridge.

[0034] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0035] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. The assembled intelligent support structure is characterized by: include: a rubber layer, which is provided with multiple layers; The steel plate layer is provided with multiple layers, and a plurality of piezoelectric film sensors are arranged at equal intervals along the periphery above one of the steel plate layers, wherein the multiple rubber layers and the multiple steel plate layers are alternately arranged and bonded to form an internal support structure; A cast-in-place rubber layer, which is an annular rubber layer cast on the periphery of the internal support structure through a casting template; Wherein, a cable hole for the cable of the piezoelectric film sensor to pass through is arranged on the casting template, and the cable between the casting template and the internal support structure is cast in the annular rubber layer.

2. The assembled intelligent support structure according to claim 1, characterized in that: Each rubber layer includes N rubber modules, and one corner of each rubber module has an arc-shaped notch. After the N rubber modules are spliced ​​and bonded, the arc-shaped notches of the N rubber modules are spliced ​​to form a first circular hole; a second circular hole is arranged at the center position of each steel plate layer, and the diameters of the first circular hole and the second circular hole are the same; wherein, after the multiple rubber layers and the multiple steel plate layers are alternately bonded and connected, a grouting hole is formed by the first circular hole and the second circular hole at the center position of the internal support structure, and polyurethane rubber is poured in the grouting hole.

3. The assembled intelligent support structure according to claim 1, characterized in that: Epoxy resin is provided on the surface of each piezoelectric film sensor to encapsulate it. The piezoelectric film sensor is a PVDF piezoelectric film sensor, and the cable of each piezoelectric film sensor is made of polytetrafluoroethylene.

4. The assembled intelligent support structure according to claim 1, characterized in that: When the rubber layers and the steel plate layers are alternately arranged and bonded, the rubber layers and the steel plate layers, as well as adjacent rubber layers, are bonded and connected using cold vulcanized adhesive.

5. The assembled intelligent support structure according to claim 1, characterized in that: The cross sections of the rubber layer and the steel plate layer are circular or square, the cross section of the cast-in-place rubber layer is circular or square, and the cast-in-place rubber layer is a polyurethane rubber layer.

6. The assembled intelligent support structure according to claim 2, characterized in that: The number N of rubber modules provided in each rubber layer is 2 or 4.

7. A method for installing an assembled intelligent support, applicable to the assembled intelligent support structure according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1, bonding and splicing the rubber modules to form a multi-layer rubber layer; Step S2, a plurality of piezoelectric film sensors are arranged above one of the steel plate layers along the periphery at equal intervals; Step S3, alternately bonding the multiple rubber layers and the multiple steel plate layers, the first circular hole on the rubber layer and the second circular hole on the steel plate layer form a grouting hole, and pouring polyurethane rubber into the grouting hole to form an internal support structure; Step S4, arranging a casting template around the internal support structure, and passing the cable of each piezoelectric film sensor through the corresponding cable hole on the casting template; Step S5, pouring polyurethane rubber into the gap between the pouring template and the internal support structure; Step S6: after the polyurethane rubber to be cast is solidified, the casting template is removed, and the cables of each piezoelectric film sensor are checked to see whether they are normal; Step S7: Connect each piezoelectric film sensor to an external data acquisition instrument.

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