Vibration device for simulating new and old bridge splicing seam construction

Abstract

The utility model relates to a vibration device for simulating new and old bridge splicing seam construction, and the device comprises a vibration rack which comprises a pedestal, a vibration table connected to the pedestal through a floating supporting mechanism, and vibration equipment for vibrating the vibration table; the fixed rack is located on one side of the vibration rack, and the top surface of the fixed rack is flush with the top surface of the vibration table; and the test piece mold is positioned at the tops of the vibration table and the fixed rack and is detachably connected with the vibration table and the fixed rack. A test piece mold is fixed to the top of a vibration rack and the top of a fixed rack, one part of the test piece mold is fixed to a vibration table, and the other part of the test piece mold is fixed to the fixed rack. According to the invention, the working condition of vibration interference of a vehicle in a traffic state on a new and old bridge splicing seam is simulated. The concrete test piece in the test piece mold simulates the concrete setting process of a construction site, and the interference condition of vehicle vibration on the concrete strength is obtained, so that the purpose of verifying the feasibility of the concrete mix proportion is achieved.

Description

Technical Field

[0001] This application relates to the field of building material testing technology, and in particular to a vibration device for simulating the construction of splice joints between new and old bridges. Background Technology

[0002] With the development of highway construction, the current state of new expressway construction is approaching saturation, resulting in fewer and fewer new projects being built in the future. However, some expressways built and opened to traffic in earlier years, due to insufficient forward-looking design, are struggling to meet the ever-increasing traffic demands as the social economy continues to develop, leading to frequent traffic congestion.

[0003] Against this backdrop, highway reconstruction and expansion projects will become increasingly common. However, the construction of joints between new and old bridges in these projects becomes a key focus and a major challenge. The quality of the joint between the new and old bridges directly impacts traffic safety after the bridge opens to traffic and is a critical factor in the success or failure of the construction.

[0004] Widening an existing bridge on a road differs from constructing a bridge on a completely new road. Often, it's crucial to maintain some traffic capacity during the widening process. In such cases, the typical approach is to widen one lane (half of the road) first, while keeping the other half open to traffic, allowing existing vehicles to use the reserved half.

[0005] The construction of half of the bridge deck is carried out by demolishing and widening one half and concentrating the traffic on the other half to keep the traffic flowing smoothly. The increased traffic volume can easily lead to a large bending moment on the bridge beams, or the large reaction force exerted on the bridge deck by vehicles starting and braking suddenly can affect the curing process of the wet joints.

[0006] However, current testing equipment cannot simulate the working conditions of half-width traffic and half-width construction during the construction of splice joints between new and old bridges. It cannot simulate the setting process of wet joints from initial setting to final setting under vibration. Consequently, it is impossible to optimize and improve the concrete mix ratio of wet joints, resulting in the wet joints still cracking under stress after setting. Summary of the Invention

[0007] This application provides a vibration device for simulating the construction of splice joints between new and old bridges, in order to solve the problem that current testing equipment in related technologies cannot simulate the working conditions of half-width traffic and half-width construction during the construction of splice joints between new and old bridges, and cannot simulate the setting process of wet joints from initial setting to final setting under vibration.

[0008] This application provides a vibration device for simulating the construction of splice joints between new and old bridges, including:

[0009] A vibration table frame, comprising a base, a vibration table connected to the base via a floating support mechanism, and a vibration device for vibrating the vibration table;

[0010] A fixed frame is located on one side of the vibration table, and the top surface of the fixed frame is flush with the top surface of the vibration table.

[0011] A specimen mold is located on top of the vibration table and the fixed frame and is detachably connected to the vibration table and the fixed frame.

[0012] In some embodiments, the vibration device includes a vibrator fixed to the bottom surface of the vibration table and a controller connected to the vibrator, the controller being used to adjust the vibration frequency and vibration amplitude of the vibrator.

[0013] In some embodiments: the floating support mechanism includes multiple guide rods vertically connected to the bottom surface of the vibration table, an elastic support member is provided between the base and the vibration table to elastically support the vibration table, and a nut is provided at one end of the guide rod that passes through the base to adjust the elastic force of the elastic support member.

[0014] In some embodiments, the elastic support is a compression helical spring, and multiple compression helical springs are provided, with each compression helical spring respectively sleeved on the outer periphery of each guide rod.

[0015] In some embodiments, the fixed frame and the base are integrally formed or connected by welding or fasteners.

[0016] In some embodiments: the specimen mold is a rigid shell with an open top and closed sides, and the top of the vibration table and the fixed frame are both provided with fastening clamps, which fix the specimen mold to the top of the vibration table and the fixed frame.

[0017] In some embodiments: the top of the vibration table and the fixed frame are provided with multiple inverted "T" shaped mounting slots that are parallel to each other, and the fastening fixture includes a "T" shaped screw that is slidably connected in the inverted "T" shaped mounting slot, and a pressure plate and nut for pressing the specimen mold are sleeved on the "T" shaped screw.

[0018] In some embodiments: the pressure plate is a long strip structure, and long holes are respectively opened at both ends of the pressure plate along the length direction of the pressure plate. One end of the "T"-shaped screw is inserted into the long hole and the pressure plate is pressed by the nut.

[0019] In some embodiments, a vibration sensor is connected to the vibration table to detect the vibration frequency and amplitude of the vibration table.

[0020] In some embodiments, the inner surface of the specimen mold is coated with a release coating.

[0021] The beneficial effects of the technical solution provided in this application include:

[0022] This application provides a vibration device for simulating the construction of splice joints between new and old bridges. The vibration device for simulating the construction of splice joints between new and old bridges includes a vibration table, which includes a base, a vibration table connected to the base via a floating support mechanism, and a vibration device for vibrating the vibration table; a fixed frame located on one side of the vibration table, with its top surface flush with the top surface of the vibration table; and a specimen mold located on top of the vibration table and the fixed frame and detachably connected to them.

[0023] Therefore, the vibration device for simulating the construction of splice joints between new and old bridges in this application has a specimen mold fixed on top of the vibration table and the fixed platform. Part of the specimen mold is fixed to the vibration table, and the other part is fixed to the fixed platform. By controlling the current of the vibration device, the vibration table can be adjusted to achieve the designed amplitude and frequency. This application simulates the vibration interference caused by vehicles on the splice joints of new and old bridges under traffic conditions. The concrete specimen inside the specimen mold simulates the concrete setting process at the construction site, obtaining information on the interference of vehicle vibration on the concrete strength, thereby verifying the feasibility of the concrete mix design. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a top view of the structure of an embodiment of this application;

[0026] Figure 2 This is a structural front view of an embodiment of this application.

[0027] Figure label:

[0028] 1. Vibration table; 2. Fixed table; 3. Specimen mold; 4. Base; 5. Floating support mechanism; 6. Vibration table; 7. Vibration machine; 8. Controller; 9. Inverted "T" shaped mounting groove; 10. "T" shaped screw; 11. Pressure plate; 12. Guide rod; 13. Elastic support component; 14. Vibration sensor. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] This application provides a vibration device for simulating the construction of splice joints between new and old bridges. It can solve the problem that current testing equipment in related technologies cannot simulate the working conditions of half-width traffic and half-width construction during the construction of splice joints between new and old bridges, and cannot simulate the setting process of wet joints from initial setting to final setting under vibration.

[0031] See Figure 1 and Figure 2 As shown in the figure, this application provides a vibration device for simulating the construction of splice joints between new and old bridges, including:

[0032] The vibration table 1 includes a base 4, a vibration table 6 connected to the base 4 via a floating support mechanism 5, and a vibration device for exciting the vibration table 6. The base 4 is used to simulate the piers of the old bridge, the floating support mechanism 5 is used to simulate the pot bearings of the old bridge, the vibration device is used to simulate vehicles running on the old bridge and generating vibrations, and the vibration table 6 is used to simulate the bridge deck of the old bridge.

[0033] A fixed platform 2 is located on one side of the vibrating platform 1, and the top surface of the fixed platform 2 is flush with the top surface of the vibrating platform 6. The fixed platform 2 is used to simulate a new bridge located next to the old bridge. Since the new bridge is under construction and closed, the joint connecting the new bridge and the old bridge is affected by the vibration generated by vehicles running back and forth on the old bridge, which in turn affects the structural strength of the joint after solidification.

[0034] The specimen mold 3 is located on top of the vibration table 6 and the fixed frame 2 and is detachably connected to them. The specimen mold 3 is used to hold wet joint concrete specimens with a set mix ratio, allowing the wet joint concrete specimens to gradually solidify under the vibration environment of the vibration table 1 within the specimen mold 3, thereby simulating the concrete setting process at the construction site and obtaining the interference of vehicle vibration on the concrete strength.

[0035] The vibration device used in this embodiment to simulate the construction of the joint between old and new bridges has a specimen mold 3 fixed on top of the vibration table 1 and the fixed table 2. Part of the specimen mold 3 is fixed on the vibration table 6, and the other part is fixed on the fixed table 2. By controlling the current of the vibration device, the vibration table 6 can be adjusted to achieve the designed amplitude and frequency. This application simulates the vibration interference caused by vehicles on the joint between old and new bridges under traffic conditions.

[0036] This application uses wet-joint concrete specimens within specimen mold 3 to simulate the concrete setting process at a construction site, obtaining information on the impact of vehicle vibration on concrete strength, thereby verifying the feasibility of the concrete mix design. After the set wet-joint concrete specimens are removed from mold 3, pressure tests are conducted to determine the structural strength of the specimens set under vibration. This facilitates optimization of the wet-joint concrete mix design in practical engineering, ensuring it reaches the design strength and improving construction quality.

[0037] In some alternative embodiments: see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a vibration device for simulating the construction of splice joints between new and old bridges. The vibration device includes a vibrator 7 fixed on the bottom surface of the vibration table 6, and a controller 8 connected to the vibrator 7. The controller 8 is used to adjust the vibration frequency and vibration amplitude of the vibrator 7.

[0038] The vibratory machine 7 serves as the vibration source for the vibration table 6, providing the vibration force for the vibration table 6. The controller 8 is connected to the vibratory machine 7 and is used to adjust the vibration frequency and amplitude of the vibratory machine 7 to realistically simulate the vibration frequency and amplitude generated by vehicles on the old bridge. The controller 8 is also used to adjust the working duration of each vibration frequency and amplitude of the vibratory machine 7, thereby simulating the peak and off-peak periods of vehicle operation on the old bridge.

[0039] In some alternative embodiments: see Figure 1 and Figure 2 As shown, this application embodiment provides a vibration device for simulating the construction of splice joints between new and old bridges. The floating support mechanism 5 of the vibration device includes multiple guide rods 12 vertically connected to the bottom surface of the vibration table 6. An elastic support member 13 is provided between the base 4 and the vibration table 6 to elastically support the vibration table 6. A nut is provided at one end of the guide rod 12 that passes through the base 4 to adjust the elastic force of the elastic support member 13.

[0040] The elastic support 13 is preferably, but not limited to, a compression coil spring. Multiple compression coil springs are provided, each sleeved around the outer periphery of one of the guide rods 12. The guide rods 12 provide guidance for the vertical movement of the vibration table 6, and the elastic support 13 provides elastic support for the vibration table 6 and a floating space for its vertical movement. A nut connected to the guide rod 12 allows adjustment of the elastic support force of the elastic support 13.

[0041] In some alternative embodiments: see Figure 1 and Figure 2 As shown in the figure, this application embodiment provides a vibration device for simulating the construction of splice joints between new and old bridges. The fixed frame 2 and the base 4 of the vibration device are integrally formed or connected by welding or fasteners. The fixed connection between the fixed frame 2 and the base 4 makes the structure of the base 4 more stable and avoids vibration of the base 4 by the vibration device.

[0042] In some alternative embodiments: see Figure 1 and Figure 2 As shown in the embodiment of this application, a vibration device for simulating the construction of splice joints between new and old bridges is provided. The specimen mold 3 of this vibration device is a rigid shell with an open top and closed sides. The inner surface of the specimen mold 3 is coated with a release coating to facilitate the removal of the solidified wet joint concrete specimen from the specimen mold 3. Both the vibration table 6 and the fixed frame 2 are equipped with fastening clamps at their tops, which fix the specimen mold 3 to the tops of the vibration table 6 and the fixed frame 2.

[0043] Multiple inverted "T"-shaped mounting slots 9 running parallel to each other are provided on the top of both the vibration table 6 and the fixed frame 2. The fastening fixture includes a "T"-shaped screw 10 that slides within the inverted "T"-shaped mounting slot 9. A pressure plate 11 and a nut for pressing the specimen mold 3 are fitted onto the "T"-shaped screw 10. The sliding of the "T"-shaped screw 10 within the inverted "T"-shaped mounting slot 9 can fix specimen molds 3 of various sizes and specifications, thereby improving the versatility of the vibration device.

[0044] The pressure plate 11 is a long strip structure, with elongated holes at both ends along its length. One end of the "T"-shaped screw 10 is inserted into the elongated hole and tightened into the pressure plate 11 by a nut. One end of the pressure plate 11 is connected to the vibration table 6 via the "T"-shaped screw 10, and the other end of the pressure plate 11 is connected to the fixed frame 2 via the "T"-shaped screw 10. The pressure plate 11 is located on top of the specimen mold 3.

[0045] In some alternative embodiments: see Figure 1 and Figure 2As shown in the figure, this application embodiment provides a vibration device for simulating the construction of splice joints between new and old bridges. The vibration device has a vibration sensor 14 connected to the vibration table 6 to detect the vibration frequency and amplitude of the vibration table 6. The vibration sensor 14 detects the current vibration frequency and amplitude of the vibration table 6, and adjusts the vibration frequency and amplitude of the vibrator 7 through the controller 8 to make the vibration table 6 closer to the actual vibration conditions of the old bridge.

[0046] Working principle

[0047] This application provides a vibration device for simulating the construction of splice joints between new and old bridges. The vibration device for simulating the construction of splice joints between new and old bridges includes a vibration table 1, which includes a base 4, a vibration table 6 connected to the base 4 via a floating support mechanism 5, and a vibration device for vibrating the vibration table 6; a fixed frame 2, which is located on one side of the vibration table 1 and whose top surface is flush with the top surface of the vibration table 6; and a specimen mold 3, which is located on top of the vibration table 6 and the fixed frame 2 and is detachably connected to the vibration table 6 and the fixed frame 2.

[0048] Therefore, the vibration device for simulating the construction of splice joints between new and old bridges in this application has a specimen mold 3 fixed on the top of the vibration table 1 and the fixed table 2. Part of the specimen mold 3 is fixed on the vibration table 6, and the other part is fixed on the fixed table 2. By controlling the current of the vibration device, the vibration table 6 is adjusted to achieve the designed amplitude and frequency. This application simulates the vibration interference caused by vehicles on the splice joints between new and old bridges under traffic conditions. The concrete specimen in the specimen mold 3 simulates the concrete setting process at the construction site, obtaining the interference of vehicle vibration on the concrete strength, thereby verifying the feasibility of the concrete mix design.

[0049] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0050] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A vibration device for simulating the construction of joints between new and old bridges, characterized in that, include: A vibration table (1) includes a base (4), a vibration table (6) connected to the base (4) by a floating support mechanism (5), and a vibration device for vibrating the vibration table (6); A fixed frame (2) is located on one side of the vibration table (1), and the top surface of the fixed frame (2) is flush with the top surface of the vibration table (6). The specimen mold (3) is located on top of the vibration table (6) and the fixed frame (2) and is detachably connected to the vibration table (6) and the fixed frame (2).

2. The vibration device for simulating the construction of splice joints between new and old bridges as described in claim 1, characterized in that: The vibration device includes a vibrator (7) fixed to the bottom surface of the vibration table (6) and a controller (8) connected to the vibrator (7), the controller (8) being used to adjust the vibration frequency and vibration amplitude of the vibrator (7).

3. A vibration device for simulating the construction of splice joints between new and old bridges as described in claim 1 or 2, characterized in that: The floating support mechanism (5) includes multiple guide rods (12) vertically connected to the bottom surface of the vibration table (6). An elastic support member (13) is provided between the base (4) and the vibration table (6) to elastically support the vibration table (6). A nut is provided at one end of the guide rod (12) that passes through the base (4) to adjust the elastic force of the elastic support member (13).

4. The vibration device for simulating the construction of splice joints between new and old bridges as described in claim 3, characterized in that: The elastic support (13) is a compression helical spring, and multiple compression helical springs are provided, with each compression helical spring respectively sleeved on the outer periphery of each guide rod (12).

5. A vibration device for simulating the construction of splice joints between new and old bridges as described in claim 1 or 2, characterized in that: The fixed frame (2) and the base (4) are integrally formed or connected by welding or fasteners.

6. A vibration device for simulating the construction of splice joints between new and old bridges as described in claim 1 or 2, characterized in that: The specimen mold (3) is a rigid shell with an open top and closed sides. The top of the vibration table (6) and the fixed frame (2) are both equipped with fastening clamps, which fix the specimen mold (3) to the top of the vibration table (6) and the fixed frame (2).

7. The vibration device for simulating the construction of splice joints between new and old bridges as described in claim 5, characterized in that: The top of the vibration table (6) and the fixed frame (2) are provided with multiple inverted "T" shaped mounting grooves (9) that are parallel to each other. The fastening fixture includes a "T" shaped screw (10) that is slidably connected in the inverted "T" shaped mounting groove (9). The "T" shaped screw (10) is fitted with a pressure plate (11) and a nut for pressing the test piece mold (3).

8. The vibration device for simulating the construction of splice joints between new and old bridges as described in claim 7, characterized in that: The pressure plate (11) has a long strip structure. Both ends of the pressure plate (11) are provided with elongated holes along the length direction of the pressure plate (11). One end of the "T"-shaped screw (10) is inserted into the elongated hole and the pressure plate (11) is pressed by the nut.

9. The vibration device for simulating the construction of splice joints between new and old bridges as described in claim 1, characterized in that: The vibration table (6) is connected to a vibration sensor (14) for detecting the vibration frequency and amplitude of the vibration table (6).

10. The vibration device for simulating the construction of splice joints between new and old bridges as described in claim 1, characterized in that: The inner surface of the specimen mold (3) is coated with a release coating.

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