Novel shock insulation support rapid replacement device and replacement method

Abstract

The invention relates to the technical field of seismic resistance and transformation of civil engineering structures, and particularly discloses a novel quick replacement device and method for a seismic isolation support. Pre-pressing and accurate positioning of a new shock insulation support are achieved through the counter-force supporting frame and the pre-pressing system, rapid dismounting of an old or damaged shock insulation support and mounting of the new support are achieved, micro jacking can be conducted on an upper structure within a small disturbance range, the replacement efficiency is remarkably improved, and the construction risk is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical fields of civil engineering and seismic isolation equipment, and particularly relates to a novel device and method for quickly replacing seismic isolation bearings. Background Art

[0002] With the continuous development of modern building seismic technologies, seismic isolation technology has gradually become an important part of the safety design of building structures. As a key component of the seismic isolation system, the main function of the seismic isolation bearing is to isolate and dissipate seismic energy, thereby reducing the impact and damage of earthquakes on the superstructure. Currently, seismic isolation bearings have been widely used in high-rise buildings, bridges, and important public facilities, and their excellent seismic performance and durability have been recognized by a large number of engineering and technical personnel.

[0003] However, due to the inevitable influence of material aging, fatigue damage, environmental erosion, and extreme working conditions (such as seismic impact) during the long-term service of seismic isolation bearings, their performance gradually degrades or even fails. Traditional methods for replacing seismic isolation bearings usually rely on jacking up the entire building or superstructure over a large area to remove the old bearings and install new ones. Such methods have many problems, such as cumbersome construction procedures, high equipment investment, long construction periods, and possible local disturbances to the building structure. Especially in emergency repairs after earthquakes, large-scale structure jacking is more likely to cause new safety hazards and bring difficulties to subsequent repair work.

[0004] Based on the above problems, there is an urgent need to develop a device that can quickly replace seismic isolation bearings without significantly disturbing the superstructure. This device should not only meet the requirements of safety and efficiency during construction but also have the advantages of simple structure, convenient operation, economic applicability, etc., so as to greatly improve the overall efficiency and engineering quality of the seismic isolation bearing replacement operation. Summary of the Invention

[0005] Aiming at the defects and problems that the removal of old bearings and the installation of new bearings currently require jacking up the entire building or superstructure over a large area, with complex construction and low efficiency, and causing disturbances to the entire building structure, the present invention provides a novel device and method for quickly replacing seismic isolation bearings.

[0006] The present invention provides a rapid replacement device for seismic isolation bearings, which includes a reaction force support system, a seismic isolation bearing, a preloading system, and an auxiliary support system. The reaction force support system includes a set of parallel and correspondingly arranged support frames, and sliding grooves are provided on the inner sides of the vertical rods on both sides of the support frames; the seismic isolation bearing is located at the central position of the reaction force support system. The preloading system includes an upper support connecting rod group and a lower support connecting rod group. The upper support connecting rod group is installed on the upper surface of the seismic isolation bearing, and the lower support connecting rod group is installed on the lower surface of the seismic isolation bearing; upper preloading structures are provided at both ends of the upper support connecting rod group, and lower preloading structures are provided at both ends of the lower support connecting rod group. The upper preloading structure includes an upper sliding rod and an upper jack. The upper sliding rod is located above the upper support connecting rod group, and the upper jack is connected to the upper sliding rod so that the upper sliding rod can vertically move in the sliding groove and press on the upper support rod group; the lower preloading structure includes a lower sliding rod and a lower jack. The lower sliding rod is located below the lower support connecting rod group, and the lower jack is connected to the lower sliding rod so that the lower sliding rod can vertically move in the sliding groove and press on the lower support rod group; the auxiliary support system is used for auxiliary support of the building.

[0007] For the above rapid replacement device for seismic isolation bearings, the jack is a hydraulic jack, and it is externally connected to a hydraulic pump station, a pressure gauge, and a displacement sensor.

[0008] For the above rapid replacement device for seismic isolation bearings, the jack is installed in the middle of the upper frame of the support frame, and the movable end of the jack is fixedly connected to the axis of the sliding rod.

[0009] For the above rapid replacement device for seismic isolation bearings, both the upper support connecting rod group and the lower support connecting rod group are two parallel support connecting rods. Reserved holes corresponding to the installation holes on the seismic isolation bearing are provided on the support connecting rods. The upper support link group is connected to the upper connecting plate of the seismic isolation bearing, and the lower support connecting rod group is connected to the lower connecting plate of the seismic isolation bearing.

[0010] For the above rapid replacement device for seismic isolation bearings, a scale is provided on the outer side surface of the support frame.

[0011] The present invention also provides a new method for rapid replacement of seismic isolation bearings. Using the rapid replacement device for seismic isolation bearings described in any one of the above, rapid replacement of a new seismic isolation bearing is carried out, including the following steps: S1. Pre-inspect the new seismic isolation support to be installed, perform pre-treatment on it. After the treatment is completed, pre-install the new seismic isolation bearing at the predetermined installation position in the middle of the support connecting rods of the preloading system; S2. Assemble the support frames, upper jacks, lower jacks, upper sliding rods and lower sliding rods at both ends of the upper and lower support connecting rod groups, and adjust the positions of the support frames according to the structural stress requirements, so that the upper sliding rods press down on the upper support connecting rod group and the lower sliding rods press up on the lower support connecting rod group, while forming a balanced stress platform among the upper support connecting rod group, the lower support connecting rod group and the support frames; S3. Measure the height of the original isolation bearing as the target height value, and determine the preloading height of the new isolation bearing according to the target height value; S4. Start the upper jacks and lower jacks, and gradually apply preloading force to the new isolation bearing according to the preloading height, so that the new isolation bearing is compressed to the preloading height; S5. After the new isolation bearing is preloaded in place, install a temporary auxiliary support system on both sides of the old isolation bearing, and then slowly remove the old isolation bearing; S6. After the old isolation bearing is completely removed, immediately adjust the new isolation bearing to the position of the old isolation bearing, and continue to apply pressure using the jacks to firmly connect the new isolation bearing with the building foundation to complete the installation of the new isolation bearing; S7. After the installation of the new isolation bearing is completed, remove the auxiliary support system, detect and accept the fixed state, stress distribution and connection quality of the new isolation bearing. After passing the acceptance, gradually remove the preloading system and the reaction force support system.

[0012] In the above rapid replacement method of the new isolation bearing, the pretreatment described in step S1 includes surface cleaning, degreasing, rust removal and anti-corrosion treatment.

[0013] In the above rapid replacement method of the new isolation bearing, when adjusting the position of the support frame in step S2, a high-precision measuring instrument is used to accurately align the central axis of the jack with the axis of the sliding rod.

[0014] In the above rapid replacement method of the new isolation bearing, in step S4, the stress condition of the new isolation bearing is monitored in real time when applying the preloading force.

[0015] In the above rapid replacement method of the new isolation bearing, step S4 also includes monitoring the scale in real time to ensure that the new isolation bearing reaches the preloading height.

[0016] Compared with the prior art, the beneficial effects of the present invention are: Through the mechanical connection and cooperation of the reaction force support frame, preloading system, and auxiliary support structure, the present invention can achieve preloading and positioning of the new bearing, removal of the old bearing, and rapid installation of the new bearing. The reaction force support frame is arranged at both ends of the seismic isolation bearing to ensure that the building or bridge structure does not undergo adverse displacement when pressure is applied by the hydraulic jack. The preloading system is used to preload the newly installed seismic isolation bearing. While applying a jacking force using the jack, the new bearing is continuously preloaded to make the new bearing reach the designed stress state before installation, ensuring a tight connection between the new bearing and the building. The reaction force support frame is used to fix the installation position of the seismic isolation bearing to be replaced, which can not only bear the temporary construction load but also ensure relative immobility during the entire replacement process.

[0017] The present invention constitutes a connection device between the new bearing and the support frame through a connecting rod and high-strength fixing bolts. Before installing the new bearing, it is first accurately positioned on the support frame, and then the overall fixation is achieved through bolt tightening. After the new bearing is preloaded in place, the original old or damaged seismic isolation bearing is slowly removed by sliding or pushing. During the removal process, to prevent the building structure from undergoing displacement due to local force imbalance, a temporary support device should be installed at the original bearing position simultaneously to ensure that the upper structure is always in a safe stress state. After the old bearing is removed, the new bearing is quickly installed at the original old bearing position, and the hydraulic jack is used to continue applying pressure to achieve a tight connection between the new bearing and the foundation. During the installation process, the pressure distribution on the contact surface between the new bearing and the foundation is monitored through sensors to ensure that the installation meets the design requirements. Through the comprehensive construction plan of pre-inspection and pre-treatment of the new bearing during the replacement process, applying preloading using precise positioning and real-time monitoring means, setting up temporary supports to ensure the safe removal of the old bearing of the upper structure, and quickly installing the new bearing in place, not only the smooth disassembly of the old bearing and the precise installation of the new bearing are achieved, but also the building does not need to be lifted as a whole, significantly reducing the impact on the original structure. While ensuring the quality of the seismic isolation bearing replacement, the present invention keeps the upper structure in a balanced stress state during the entire replacement process, providing an efficient, stable, and easy-to-implement technical approach for large-scale or difficult seismic isolation bearing replacements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the rapid replacement device for the seismic isolation bearing of the present invention Figure 1 。

[0019] Figure 2 Schematic diagram of the rapid replacement device for the seismic isolation bearing of the present invention Figure 2 。

[0020] Figure 3 Schematic diagram of the structure of the reaction force support frame of the present invention.

[0021] Figure 4Schematic diagram of the fixed connection structure between the connecting rod and the new bearing of the present invention.

[0022] Figure 5 Application schematic diagram of the quick replacement device for the seismic isolation bearing of the present invention.

[0023] Figure 6 Schematic diagram of the completion of the replacement of the quick replacement device for the seismic isolation bearing of the present invention.

[0024] Reference numerals in the figure: 1 is the support frame, 21 is the upper sliding rod, 22 is the lower sliding rod, 3 is the sliding groove, 4 is the seismic isolation bearing, 51 is the upper bearing connecting rod, 52 is the lower bearing connecting rod, 61 is the upper jack, 62 is the lower jack, 7 is the scale, 8 is the auxiliary support structure, 9 is the high-strength bolt. Detailed implementation manners

[0025] In view of the problems such as complex construction, large disturbance and low efficiency existing in the replacement process of the above-mentioned seismic isolation bearing, the present invention provides a novel quick replacement device for seismic isolation bearings. It can quickly replace old or damaged seismic isolation bearings under the condition of small-range disturbance, and constitutes an integrated system that can realize preloading, positioning of new bearings, removal of old bearings and rapid installation of new bearings. It is particularly suitable for emergency repair after earthquakes, renewal of seismic isolation systems of old structures and related civil engineering renovation projects.

[0026] Embodiment: This embodiment provides a quick replacement device for seismic isolation bearings, as Figures 1-4 shown. The quick replacement device for seismic isolation bearings includes a reaction force support system, a seismic isolation bearing, a preloading system and an auxiliary support system; wherein the reaction force support system is used to provide stable support and bear the construction load. It is composed of a group of parallel and correspondingly arranged high-strength rigid support frames 1. Its core function is to provide stable reaction force support and prevent displacement when the jack is pressurized. It is symmetrically arranged on both sides of the seismic isolation bearing, so that the seismic isolation bearing 4 is located at the center position of the reaction force support system.

[0027] The support frame is a square or rectangular frame structure, welded by high-strength steel, with high compressive and bending strength. Sliding grooves 3 are provided on the inner sides of the two vertical poles of the support frame to facilitate the vertical movement of the sliding rods in the sliding grooves; a scale is provided on the outer side of the support frame to monitor the displacement of the sliding rods in real time and control the preloading amount or jacking height of the new bearing.

[0028] The preloading system includes an upper support connecting rod group and a lower support connecting rod group. Each support connecting rod group includes two support connecting rods, and reserved holes are provided on the support connecting rods. The upper support connecting rod group is installed on the upper surface of the isolation bearing 4 through bolts, and the lower support connecting rod group is installed on the lower surface of the isolation bearing. Upper preloading structures are provided at both ends of the upper support connecting rod group, and lower preloading structures are provided at both ends of the lower support connecting rod group. The upper preloading structure includes an upper sliding rod 21 and an upper jack 61. The upper sliding rod 21 is located above the upper support connecting rod group, and the upper jack is fixed at the axial center position of the upper sliding rod through high-strength bolts or buckles. By applying pressure with the jack, the upper sliding rod is pushed to move vertically downward along the sliding groove 3, thereby realizing the jacking pressure on the upper support rod. Similarly, the lower preloading structure includes a lower sliding rod 22 and a lower jack 62. The lower sliding rod is located below the lower support connecting rod group, and the lower jack is connected to the lower sliding rod. By applying pressure with the jack, the lower sliding rod is pushed to move vertically upward along the sliding groove, thereby realizing the jacking pressure on the lower support rod. The jacks used are hydraulic jacks, which are externally connected to a hydraulic pump station, a pressure sensor, and a displacement sensor to realize the synchronous monitoring of the jacking force and displacement; according to the weight of the upper structure of the building and the design bearing capacity of the isolation bearing, hydraulic jacks of different tonnages can be selected to meet the needs of bearing replacement; at the same time, in order to ensure that the four jacks can apply pressure synchronously, a hydraulic synchronous control system is used for control, and the preloading load is monitored through a pressure sensor, while meeting the requirements, avoiding the problem of uneven stress distribution caused by eccentric loading due to asynchronous pressure application.

[0029] The auxiliary support system can be a structure that can support the building, facilitating the auxiliary support of the building when the old isolation bearing is removed, and preventing the displacement of the building structure due to local stress imbalance.

[0030] During the specific construction, the following steps are included: S1: Conduct a comprehensive pre-inspection on the new isolation bearing to be installed, and perform surface cleaning, degreasing, rust removal, and necessary anti-corrosion treatment as required. After the treatment is completed, pre-place the new isolation bearing at the designated installation position of the support connecting rod, and fix it to the support connecting rod with high-strength bolts to ensure that the new isolation bearing remains stable throughout the replacement process. This step requires necessary inspections and pre-treatments on the new isolation bearing before installation to ensure that its surface is flat and there are no obvious defects in each connection part.

[0031] S2: Set up support frames on both sides of the new isolation bearing respectively, and adjust the positions of the support frames according to the structural force requirements to form a balanced force working platform. Subsequently, by adjusting the installation position of the hydraulic jack, its central axis is accurately aligned with the support connecting rod. This step is the key to ensuring the balanced force of each part, and high-precision measuring instruments such as a laser level can be used for auxiliary positioning during the positioning process.

[0032] S3: Use a high-precision measuring tool to measure the height of the original isolation bearing, record the target height value, and determine the preloading height.

[0033] S4: Start the hydraulic jack. According to the preloading height, gradually apply a preloading force to the new bearing to compress it to the predetermined height. During the preloading process, it is necessary to monitor the force-bearing condition of the bearing in real time to ensure uniform force and avoid excessive local stress.

[0034] S5: Demolish the old bearing. After the new bearing is preloaded in place, slowly remove the original old or damaged isolation bearing by sliding or pushing and pulling. During the demolition process, in order to prevent the building structure from being displaced due to local force imbalance, a temporary support device should be installed to ensure that the upper structure is always in a safe force-bearing state.

[0035] S6: After the old bearing is completely demolished, adjust the new isolation bearing to the original bearing position, and continue to use the hydraulic jack to apply the final pressure to achieve a firm connection between the new bearing and the foundation. After the installation is completed, remove all temporary support devices, and conduct a comprehensive inspection and acceptance of the fixation state, force distribution, and connection quality of the new bearing to ensure that it meets the engineering design requirements, so as to achieve the purpose of long-term safe use.

[0036] S7: After the new bearing is installed, gradually unload the hydraulic jack, and remove the reaction frame, connecting rod, and hydraulic jack.

[0037] The working process principle of the construction work is as follows: In the construction method of the replacement device involved in the present invention, first place the new isolation bearing at the designated installation position of the bearing connecting rod in advance, and fix it to the connecting rod with high-strength bolts to ensure that the new isolation bearing remains stable during the entire replacement process. This step requires necessary inspection and pretreatment of the new bearing before installation to ensure that its surface is flat and there are no obvious defects in each connection part.

[0038] Then place the support frames on both sides of the isolation bearing respectively, and adjust the position of the device so that the central axis of the hydraulic or mechanical jack is accurately aligned with the bearing connecting rod. This step is the key to ensuring the balanced force of each part. During the positioning process, high-precision measuring instruments such as a laser level can be used for auxiliary positioning.

[0039] Then, use a high-precision measuring tool to measure the height of the original isolation bearing and record the target height value. Start the hydraulic jack and gradually apply pre-pressure to the new bearing to compress it to the predetermined height. During the preloading process, it is necessary to monitor the force on the bearing in real time to ensure uniform force and avoid excessive local stress. After the new isolation bearing is preloaded in place, slowly remove the original old or damaged isolation bearing by sliding or pushing and pulling. During the removal process, in order to prevent the building structure from shifting due to local force imbalance, a temporary support device should be installed at the same time to ensure that the upper structure is always in a safe stress state. After the old bearing is removed, quickly install the new isolation bearing in the position of the old isolation bearing and continue to apply pressure using the hydraulic jack to achieve a tight connection between the new isolation bearing and the foundation building. During the installation process, monitor the pressure distribution on the contact surface between the new isolation bearing and the foundation building through a pressure sensor to ensure that the installation meets the design requirements. After the installation is completed, remove all temporary support devices and conduct a comprehensive inspection of the entire replacement part to confirm that the installation quality of the bearing meets the national and engineering standards.

[0040] The above are only the preferred embodiments of the present invention and do not limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rapid replacement device for seismic isolation bearings, characterized in that: It includes a reaction force support system, a seismic isolation bearing, a preloading system and an auxiliary support system. The reaction force support system includes a set of parallel and correspondingly arranged support frames, and sliding grooves are provided on the inner sides of the vertical rods on both sides of the support frames; the seismic isolation bearing is located at the central position of the reaction force support system. The preloading system includes an upper support connecting rod group and a lower support connecting rod group. The upper support connecting rod group is installed on the upper surface of the seismic isolation bearing, and the lower support connecting rod group is installed on the lower surface of the seismic isolation bearing; upper preloading structures are provided at both ends of the upper support connecting rod group, and lower preloading structures are provided at both ends of the lower support connecting rod group. The upper preloading structure includes an upper sliding rod and an upper jack. The upper sliding rod is located above the upper support connecting rod group, and the upper jack is connected to the upper sliding rod so that the upper sliding rod can move vertically in the sliding groove and press on the upper support rod group; the lower preloading structure includes a lower sliding rod and a lower jack. The lower sliding rod is located below the lower support connecting rod group, and the lower jack is connected to the lower sliding rod so that the lower sliding rod can move vertically in the sliding groove and press on the lower support rod group. The auxiliary support system is used for auxiliary support of the building.

2. The rapid replacement device for the seismic isolation bearing according to claim 1, wherein: The jack is a hydraulic jack, and it is externally connected to a hydraulic pump station, a pressure sensor and a displacement sensor.

3. The rapid replacement device for the seismic isolation bearing according to claim 1, characterized in that: The jack is installed in the middle of the upper border of the support frame, and the movable end of the jack is fixedly connected to the axis of the sliding rod.

4. The rapid replacement device for the seismic isolation bearing according to claim 1, wherein: Both the upper support connecting rod group and the lower support connecting rod group are two parallel support connecting rods. Reserved holes corresponding to the installation holes on the seismic isolation bearing are provided on the support connecting rods. The upper support connecting rod group is connected to the upper connecting plate of the seismic isolation bearing, and the lower support connecting rod group is connected to the lower connecting plate of the seismic isolation bearing.

5. The rapid replacement device for the seismic isolation bearing according to claim 1, wherein: A scale is provided on the outer side surface of the support frame.

6. A method for rapid replacement of a new type of seismic isolation bearing, characterized in that: Using the seismic isolation bearing quick replacement device according to any one of claims 1-5 for quick replacement of a new seismic isolation bearing, includes the following steps: S1. Pre-inspect the new seismic isolation support to be installed, perform pre-treatment on it, and after the treatment is completed, pre-install the new seismic isolation bearing at the predetermined installation position in the middle of the support connecting rods of the preloading system. S2. Assemble the support frame, the upper jack, the lower jack, the upper sliding rod and the lower sliding rod at both ends of the upper support connecting rod group and the lower support connecting rod group, and adjust the position of the support frame according to the structural stress requirements, so that the upper sliding rod presses down on the upper support connecting rod group, the lower sliding rod presses up on the lower support connecting rod group, and at the same time, the upper support connecting rod group and the lower support connecting rod group form a balanced stress platform with the support frame. S3. Measure the height of the original seismic isolation bearing as the target height value, and determine the preloading height of the new seismic isolation bearing according to the target height value. S4. Synchronously start the upper jack and the lower jack, and gradually apply a preloading force to the new seismic isolation bearing according to the preloading height, so that the new seismic isolation bearing is compressed to the preloading height. S5. After the new seismic isolation bearing is preloaded in place, install a temporary auxiliary support system on both sides of the old seismic isolation bearing, and then slowly remove the old seismic isolation bearing. S6. After the old seismic isolation bearing is completely removed, immediately adjust the new seismic isolation bearing to the position of the old seismic isolation bearing, and continue to apply pressure using the jack to firmly connect the new seismic isolation bearing with the building foundation to complete the installation of the new seismic isolation bearing. After the installation of the new isolation bearing is completed, the auxiliary support system is removed, and the fixing state, force distribution, and connection quality of the new isolation bearing are inspected and accepted. After passing the acceptance, the preloading system and the reaction force support system are gradually removed.

7. The rapid replacement method of the novel seismic isolation bearing according to claim 6, characterized in that: The pretreatment described in step S1 includes surface cleaning, degreasing, rust removal, and anti-corrosion treatment.

8. The rapid replacement method of the novel seismic isolation bearing according to claim 6, characterized in that: When adjusting the position of the support frame in step S2, a high-precision measuring instrument is used to accurately align the center axis of the jack with the axis of the sliding rod.

9. The rapid replacement method of the novel seismic isolation bearing according to claim 6, characterized in that: In step S4, the force condition of the new isolation bearing is monitored in real time when applying the preload.

10. The rapid replacement method of the novel seismic isolation bearing according to claim 6, characterized in that: Step S4 also includes real-time monitoring of the scale to ensure that the new isolation bearing reaches the preloading height.

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