Prefabricated shock-absorbing and energy-dissipating connection structure for the wall structure of the nuclear island SC module and construction method

Abstract

The present invention relates to the technical field of civil engineering modular construction, and discloses an assembled shock-absorbing and energy-dissipating connection structure and construction method for the wall structure of the nuclear island SC module. The structure includes a positioning embedded part, an external anchoring baffle system, an energy-dissipating anchoring structure, and anchor bolts. The positioning embedded part is arranged at the bottom of the wall structure of the SC module, and the bottom of the positioning embedded part is provided with embedded anchor parts for connecting with the foundation bottom plate. The energy-dissipating anchoring structure includes two friction energy-dissipating plates, which are respectively connected to the external anchoring baffle system and the outer surface of the wall structure of the SC module. The two friction energy-dissipating plates are distributed up and down and can slide relative to each other along the contact surface to dissipate energy. The friction energy-dissipating plates are provided with anchor bolt holes, and the anchor bolts pass through the anchor bolt holes and are connected to the foundation bottom plate. Through the above structure, an assembled combined connection structure is formed to connect the SC module structure with the foundation bottom plate, which can realize more accurate hoisting and positioning, and at the same time has the function of shock absorption and energy dissipation, can effectively reduce the damage degree of the main body of the SC module structure, and improve the seismic performance.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering modular construction, and particularly to an assembled shock-absorbing and energy-dissipating connection structure for the wall structure of a nuclear island SC module and a construction method thereof. Background Technique

[0002] The steel plate concrete (SC) structure is a composite structure in which the steel plate and the concrete are integrally connected by stud bolts or the like. The SC composite structure can adopt modular construction technology. After transporting the precast steel plate and the steel bar skeleton formed by connection systems such as stud bolts and through steel bars inside it to the site, concrete is poured to achieve the purpose of fast and high-quality construction. In recent years, due to its unique structural characteristics, the SC module structure has been more and more widely used in the nuclear power field. Compared with ordinary steel plate concrete, its advantages are mainly reflected in the following aspects: (1) It can adopt the construction method of an assembled structure with factory prefabrication and on-site installation. (2) In the construction stage, the steel panel can be used as a formwork, reducing or completely avoiding the workload consumed by the formwork erection at the traditional construction site, and effectively accelerating the on-site construction progress. (3) In the normal use stage, the steel panel plays the role of reinforcement, so the SC module structure does not need to carry out steel bar binding construction, and the internal space of the wall is relatively large, which can greatly facilitate the construction of embedded items such as embedded parts and penetrations. (4) The bearing capacity of the SC structure with the same geometric size is higher than that of the traditional reinforced concrete structure, which is suitable for the compact nuclear island structure layout scheme and can also play an active role in the development of small nuclear reactors. (5) It has good radiation shielding and anti-impact performance. For the above reasons, the SC module structure has a wide application prospect in the future nuclear power structure field.

[0003] However, according to the feedback from the nuclear power projects under construction, for the connection between the large-scale SC module wall structure and the mass concrete structure of the nuclear island bottom plate, the existing connection method using reserved inserted steel bars + anchor plates is as follows: First, reserved inserted steel bars are left on the nuclear island concrete bottom plate, then the SC module wall structure is hoisted into place, the inserted steel bars extend into the module steel plate wall, and then concrete is poured to form a whole. This connection form has defects: During the hoisting process of the SC module structure, the stud bolts, angle steels, and out-of-plane shear channel steels inside the wall are prone to conflict with the reserved inserted steel bars in the foundation bottom plate. In particular, the inserted steel bars need to be inserted into the module wall for lap connection with the steel panel. When the SC module structure is lowered to a certain height during hoisting, the specific collision area can be discovered and determined. At this time, a part of the length of the inserted steel bars has extended into the module wall, and the on-site construction space is limited, resulting in difficult adjustment of the steel bars. Therefore, it is difficult for the module to be installed according to the original design position, bringing no small challenges to the on-site construction of the nuclear island.

[0004] To solve the above problems, the construction party introduced 3D scanning technology to conduct collision inspection and elimination on the embedded bars of the nuclear island bottom slab and the internal components of the SC module before the hoisting of the SC module. However, due to the numerous unpredictable factors in the hoisting operation of the ultra-critical project, the above technology still cannot well solve the problem of "difficult positioning" in the structural hoisting of the SC module, which has a negative impact on the popularization and application of the SC module structure. In addition, the seismic analysis results show that due to the relatively large self-stiffness of the SC module structure, the seismic response is relatively large. The existing connection method between the SC module structure and the reinforced concrete bottom slab cannot meet the high requirements of the nuclear island for seismic performance, and it is necessary to further strengthen the seismic resistance of the relevant equipment and pipelines connected to the module surface, which affects the economy of the overall design scheme of the nuclear island. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an assembled shock-absorbing and energy-dissipating connection structure and construction method for the wall structure of the nuclear island SC module, which can solve the problem of "difficult positioning" in the hoisting of the wall structure of the SC module during the installation of the SC module structure onto the nuclear island concrete foundation bottom slab, facilitate on-site construction, and have the functions of shock absorption and energy dissipation, reduce the damage degree of the main structure of the SC module under the action of seismic loads, improve the seismic performance of the wall structure of the SC module, and meet the requirements of nuclear island construction.

[0006] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0007] In the first aspect, an assembled shock-absorbing and energy-dissipating connection structure for the wall structure of the nuclear island SC module includes a positioning embedment, an external anchoring baffle system, an energy-dissipating anchoring structure, and anchor bolts. The positioning embedment is arranged at the bottom of the wall structure of the SC module, and the bottom of the positioning embedment is provided with embedded anchors for connection with the foundation bottom slab; the energy-dissipating anchoring structure includes two friction energy-dissipating plates, which are respectively connected to the external anchoring baffle system and the outer surface of the wall structure of the SC module. The two friction energy-dissipating plates are distributed up and down and can slide relative to each other along the contact surface for energy dissipation. The friction energy-dissipating plate is provided with bolt holes, and the anchor bolts pass through the bolt holes to be connected with the foundation bottom slab.

[0008] As a further implementation method, the external anchoring baffle system includes an anchoring baffle and an anchoring baffle connection embedment; the anchoring baffle is composed of a vertical plate, a horizontal plate, and a stiffening plate. The anchoring baffle connection embedment is pre-embedded before the pouring of the foundation bottom slab, and the anchoring baffle is welded to the anchoring baffle connection embedment.

[0009] As a further implementation method, the bottom of the anchoring baffle connection embedment is connected to the foundation bottom slab by anchor bolts.

[0010] As a further implementation method, the in-place embedded part includes a support plate and embedded anchor parts at the bottom. The embedded anchor parts are pre-embedded before the casting of the foundation base slab, and the embedded anchor parts are welded to the support plate; the in-place embedded anchor parts are connected to the foundation base slab by anchor bolts.

[0011] As a further implementation method, the two friction energy dissipation plates are an upper friction energy dissipation plate and a lower friction energy dissipation plate. The upper friction energy dissipation plate is connected to an external anchoring system, and the lower friction energy dissipation plate is connected to the outer surface of the SC module wall structure. A friction plate made of a metal material is embedded between the bottom of the upper friction energy dissipation plate and the top of the lower friction energy dissipation plate to increase the friction energy dissipation performance.

[0012] As a further implementation method, the friction plate made of the metal material is a brass plate.

[0013] As a further implementation method, stiffening ribs are provided at the bottom of the lower friction energy dissipation plate. If necessary, stiffening ribs can also be provided at the upper part of the upper friction energy dissipation plate, and the stiffening ribs are connected to the vertical plates of the external anchoring system.

[0014] As a further implementation method, grooves are provided on the lower friction energy dissipation plate, and the positions of the grooves are adapted to the anchor bolt holes.

[0015] As a further implementation method, an energy dissipation damper is provided between the lower friction energy dissipation plate and the external anchoring system.

[0016] In a second aspect, a construction method for an assembled shock-absorbing and energy-dissipating connection structure of a nuclear island SC module wall structure according to any one of claims 1-9 includes the following steps:

[0017] Fabricate the SC module wall structure and the energy-dissipating anchoring structure;

[0018] Pre-embed in-place embedded parts, anchor bolts and embedded parts for connecting the anchoring baffle, and then pour the concrete foundation base slab;

[0019] Lift and install the SC module wall structure on the in-place embedded parts, and install the external anchoring baffle system and the energy-dissipating anchoring structure;

[0020] Pour concrete into the steel plate structure of the SC module wall structure.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention forms an assembled combined connection structure through in-place embedded parts, an external anchoring baffle system, anchor bolts, and an energy-dissipating anchoring structure, connecting the SC module structure to the foundation slab of the nuclear island concrete structure, eliminating the need for the traditional bottom anchoring steel bars of the SC module structure, solving the possible collision problem during the hoisting process of the SC module structure, reducing the risks and challenges existing in the hoisting process of large SC module structures as ultra-critical and dangerous projects, and at the same time enabling the more precise hoisting and positioning of the SC module wall structure, solving the problem of "difficult positioning", facilitating on-site construction operations, and being conducive to the popularization and application of the SC module structure in nuclear island construction.

[0023] 2. The present invention sets in-place embedded parts at the bottom of the SC module structure and connects them before hoisting. The hoisting and positioning process is not affected by the reserved inserted steel bars, and the SC module structure can be adjusted more precisely according to the design position, improving the construction quality and construction efficiency and meeting the on-site construction requirements.

[0024] 3. The present invention is provided with an energy-dissipating anchoring structure, which dissipates the earthquake input energy through the mutual sliding of two friction energy-dissipating plates, effectively reducing the damage degree of the main body of the SC module structure under the action of earthquake loads and meeting the seismic performance requirements of the nuclear island; and by setting an energy-dissipating damper to jointly play the role of shock absorption and energy dissipation with the friction energy-dissipating plate, the seismic performance of the SC module wall structure can be further improved, and the economy of the overall design scheme of the nuclear island can be improved. In the present invention, in addition to playing the friction energy-dissipating function under the action of horizontal earthquake loads, the friction energy-dissipating plate can also limit the vertical displacement of the SC module structure by connecting the anchoring baffle, and improve the out-of-plane stiffness of the friction energy-dissipating plate by setting stiffeners out of the plane to meet the need for transmitting vertical loads.

[0025] 4. The present invention uses the in-place embedded parts to bear the self-weight of the SC module structure. After an earthquake occurs, the friction energy-dissipating plate and the energy-dissipating damper can be replaced according to the damage degree without affecting the connection between the SC module structure and the floor slab, ensuring the stability of the connection, being convenient for maintenance, and reducing the project cost.

[0026] 5. The combined connection structure and its construction method proposed by the present invention can carry out construction according to the construction method of factory prefabrication and on-site assembly, ensuring the processing quality of the components, reducing the on-site workload at the same time, and being able to effectively improve the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specification drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0028] Figure 1 It is a schematic diagram of the connection method between the SC module wall structure and the foundation slab in the embodiment of the present invention.

[0029] Figure 2 It is an exploded view of the bottom shock-absorbing and energy-dissipating connection structure of the SC module wall structure in an embodiment of the present invention.

[0030] Figure 3 It is a schematic diagram of the connection between a brass sheet and an upper friction energy-dissipating plate in an embodiment of the present invention.

[0031] Figure 4 It is a schematic diagram of the structure of a mild steel energy-dissipating damper in an embodiment of the present invention.

[0032] Figure 5 It is a schematic diagram of the installation of a mild steel energy-dissipating damper in an embodiment of the present invention.

[0033] In the figure: 1, embedded part in place; 2, lower friction energy-dissipating plate; 3, stiffening rib of the lower friction energy-dissipating plate; 4, upper friction energy-dissipating plate; 5, anchor bolt; 6, anchoring baffle; 7, embedded part for connecting the anchoring baffle; 8, brass sheet; 9, mild steel energy-dissipating damper. Specific embodiments

[0034] Next, the technical solutions in the typical embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that the following detailed description is exemplary and is intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0035] Embodiment 1

[0036] In a typical implementation manner of the present invention, referring to Figures 1 - 5 as shown, an assembled shock-absorbing and energy-dissipating connection structure for a nuclear island SC module wall structure includes an embedded part in place 1, an external anchoring baffle system, an energy-dissipating anchoring structure, and an anchor bolt 5, which is used to realize the assembled connection between the SC module wall structure and the concrete floor slab, with accurate positioning, reduced construction difficulty, and the ability to perform shock absorption and energy dissipation, improving the seismic performance at the connection between the SC module wall structure and the concrete floor slab.

[0037] As Figure 2As shown in the figure, the in-place embedded part 1 is arranged at the bottom of the wall structure of the SC module, including a support plate and embedded anchor parts at the bottom. The support plate is connected to the bottom of the wall structure of the SC module for support. In this embodiment, the support plate is made of a rectangular steel plate, and other plates that meet the strength requirements can also be used. The embedded anchor parts are anchor bolts. One end of the embedded anchor part is connected to the rectangular steel plate, and the other end is connected to the foundation bottom plate to fix the in-place embedded part 1. The in-place embedded part 1 can bear the self-weight load of the wall structure of the SC module and play a supporting role. The rectangular steel plate and the anchor bolts are connected by spot welding. It should be noted that the weld only plays a fixing role during the installation process, and its length, fillet size and spacing should be determined by calculation to ensure that the weld can be damaged under the action of earthquake and the module structure can slide freely.

[0038] The external anchoring system includes an anchoring baffle 6 and an anchoring baffle connecting embedded part 7 arranged at the bottom of the anchoring baffle 6. The anchoring baffle 6 is welded by a vertical plate, a horizontal plate and a stiffening plate. The anchoring baffle connecting embedded part 7 is pre-embedded before the foundation bottom plate is poured. The bottom of the anchoring baffle connecting embedded part 7 is connected to the foundation bottom plate by an anchor bolt; the horizontal plate of the anchoring baffle 6 is welded to the anchoring baffle connecting embedded part 7, and the bearing capacity of the weld needs to meet the requirements of the vertical load transfer of the wall structure of the SC module to play the function of transferring the vertical load. In this embodiment, the anchoring baffle connecting embedded part 7 uses an anchor bolt, and other anchor fittings can also be used.

[0039] The energy-dissipating anchoring structure includes two rectangular friction energy-dissipating plates, which are respectively connected to the outer surface of the external anchoring baffle system and the wall structure of the SC module. In this embodiment, the two friction energy-dissipating plates are respectively an upper friction energy-dissipating plate 4 and a lower friction energy-dissipating plate 2. The bottom surface of the upper friction energy-dissipating plate 4 is in close contact with the top surface of the lower friction energy-dissipating plate 2. During an earthquake, the upper friction energy-dissipating plate 4 and the lower friction energy-dissipating plate 2 slide relative to each other, and energy is dissipated through the friction of the contact surface. The two friction energy-dissipating plates are respectively connected to the outer surface of the external anchoring baffle system and the wall structure of the SC module. In this embodiment, the upper friction energy-dissipating plate 4 is connected to the external anchoring baffle system and is installed on the vertical plate of the anchoring baffle 6 on the side and moves with the anchoring baffle 6. The lower friction energy-dissipating plate 2 is fixedly connected to the outer surface of the wall structure of the SC module and moves with the wall structure of the SC module.

[0040] In order to obtain a stable friction energy-dissipating capacity and improve the seismic performance of the wall structure of the SC module, a brass sheet 8 is embedded between the bottom of the upper friction energy-dissipating plate 4 and the top of the lower friction energy-dissipating plate 2, as Figure 3As shown, a receiving groove is provided at the bottom of the upper friction energy dissipation plate 4, and the brass sheet 8 is fitted in the receiving groove. To reasonably control costs, the thickness and area of the brass sheet 8 can be determined according to the friction force requirements and the slip stroke requirements of the SC module wall structure. The brass sheet 8 is fixedly connected to the upper friction energy dissipation plate 4 to prevent it from sliding out from the middle of the friction energy dissipation plate during frictional sliding and losing its energy dissipation capacity. Of course, in other embodiments, friction sheets made of other materials can also be used to replace the brass sheet 8 to obtain a more stable energy dissipation capacity.

[0041] In addition to being able to dissipate energy through friction under the action of horizontal seismic loads, the two friction energy dissipation plates can also be integrally connected with an external anchoring system through the fixed connection between the upper friction energy dissipation plate 4 and the anchoring baffle 6 to limit the vertical displacement of the SC module structure and transfer the vertical uplift load. Considering that the out-of-plane stiffness of the rectangular plate is weak, in this embodiment, a lower friction energy dissipation plate stiffening rib 3 is provided at the bottom of the lower friction energy dissipation plate 2 for reinforcement to prevent the lower friction energy dissipation plate 2 from undergoing large out-of-plane deformation and causing vertical "lifting" failure, and to ensure the vertical anchoring effect of the SC module wall structure and the friction energy dissipation performance of the energy dissipation anchoring plate. The lower friction energy dissipation plate stiffening rib 3 is made of a steel plate with a triangular cross-section or a metal plate of other shapes.

[0042] Of course, in other embodiments, reference can be made to the reinforcement method of the lower friction energy dissipation plate 2, and an upper friction energy dissipation plate stiffening rib (not shown in the figure) can be provided at the top of the upper friction energy dissipation plate 4 to enhance the out-of-plane stiffness of the upper friction energy dissipation plate 4.

[0043] Considering that the SC module structure may deform during the assembly, erection, and hoisting processes, in order to ensure that the two friction energy dissipation plates can be in close contact and play the role of energy dissipation, embedded anchor bolts need to be provided at appropriate positions on the upper friction energy dissipation plate 4. During installation, the embedded anchor bolts are tightened to apply partial prestress between the two friction energy dissipation plates to increase the frictional force. As Figure 4 shown, in this embodiment, a foundation anchor bolt 5 is provided, and an anchor bolt hole is provided on the upper friction energy dissipation plate 4 for the foundation anchor bolt 5 to pass through. The foundation anchor bolt 5 is embedded in the foundation slab, and the upper friction energy dissipation plate 4 and the lower friction energy dissipation plate 2 are connected through the anchor bolt hole. During installation, the two friction energy dissipation plates are pressed tightly by applying prestress to the foundation anchor bolt 5. The foundation anchor bolt 5 uses existing anchor bolts on the market and only needs to meet the installation requirements for applying prestress.

[0044] It should be noted that since the frictional force between the two friction energy dissipation plates is proportional to the applied prestress, the number of foundation anchor bolts 5 is determined according to the magnitude of the prestress required. If the prestress is too large, the two friction energy dissipation plates cannot slide relative to each other under the action of seismic loads and lose their energy dissipation function; if the prestress is too small, the two friction energy dissipation plates may have poor contact, resulting in less friction and unable to achieve the ideal energy dissipation effect.

[0045] To avoid conflicts between the upper friction energy dissipation plate 4 and the lower friction energy dissipation plate 2 and the anchor bolts 5 during their relative sliding, in this embodiment, a groove is formed on the lower friction energy dissipation plate 2 to accommodate the installation position of the anchor bolts. The distance between the groove and the anchor bolts 5 is determined by the sliding displacement stroke. In other embodiments, to further avoid conflicts, the anchor bolts 5 can be cut off after the installation of the two friction energy dissipation plates is completed. At this time, during the welding process of the upper friction energy dissipation plate 4, the anchor bolts 5 need to be tightened so that there is an installation surplus between the two friction energy dissipation plates. After the anchor bolts 5 are cut off, through the restraint of the anchor retaining plate 6 and the SC module wall structure, the upper friction energy dissipation plate 4 and the lower friction energy dissipation plate 2 form a self-balanced force system and always maintain a close contact state.

[0046] To further enhance the energy dissipation performance of the connection structure, as Figure 5 shown, in this embodiment, a mild steel energy dissipation damper 9 is added between the lower friction energy dissipation plate 2 and the anchor retaining plate 6. At this time, the upper part of the anchor bolts 5 is connected to the upper friction energy dissipation plate 4 through the bolt holes, and the lower part is connected to the lower friction energy dissipation plate 2 through the bolt holes provided on the mild steel energy dissipation damper 9. By applying prestress, the upper friction energy dissipation plate 4 and the lower friction energy dissipation plate 2 are pressed tightly.

[0047] It should be noted that since the elevation deviation of the embedded parts 1 in place needs to meet the installation requirements of the SC module structure, the embedded parts 1 in place and the nuclear island bottom plate should be cast in two times, that is, in the way of secondary casting. After the casting of the embedded parts 1 in place is completed, the elevation is re-measured, and the out-of-tolerance areas should be processed by grinding or adding welding pads.

[0048] Moreover, if according to the design requirements, the energy dissipation anchoring structure in this embodiment is only used to make the SC module wall structure slide and dissipate energy under the action of extreme seismic loads, the weld calculation between the embedded parts 1 in place and the SC module wall structure also needs to meet the value of the operating seismic load. At this time, the weld plays the role of a "locking switch". The construction personnel can control the timing of the energy dissipation performance of the shock absorption and energy dissipation connection system composed of the SC module wall structure and the bottom shock absorption and energy dissipation structure by selecting the fillet size and length of the weld, so as to achieve a better structural seismic performance design.

[0049] If the weld does not need to play the role of a "locking switch", only spot welding is required according to the installation requirements. At this time, the embedded parts 1 in place only bear the vertical load, and the embedded anchor parts at the bottom of the embedded parts 1 in place can be replaced with strip-shaped steel plates.

[0050] In this embodiment, the external anchoring baffle system serves as the support for the upper friction energy dissipation plate 4, mainly used to transfer the vertical uplift load of the SC module wall structure and the horizontal load generated by the mutual friction between the two friction energy dissipation plates. The anchoring baffle 6 transfers the load to the nuclear island bottom plate through the anchoring baffle connecting embedded part 7.

[0051] It should be noted that the sizes of the upper friction energy dissipation plate 4 and the lower friction energy dissipation plate 2 are determined according to the required frictional force and uplift force. The gaps between the upper friction energy dissipation plate 4 and the SC module wall structure, and between the lower friction energy dissipation plate 2 and the anchoring baffle are calculated and determined according to the designed friction slip stroke.

[0052] Embodiment 2

[0053] Refer to Figures 1 - 5 , according to the construction method of an assembled shock-absorbing energy dissipation connection structure for a nuclear island SC module wall structure in Embodiment 1, it includes the following steps:

[0054] Prefabricate the SC module wall structure and the energy dissipation anchoring structure. Prefabricate the steel plate structure of the SC module structure in the factory, weld the lower friction energy dissipation plate 2 and the lower friction energy dissipation plate stiffener 3, process the anchor bolt holes, accommodation grooves of the upper friction energy dissipation plate 4 and the groove structure of the lower friction energy dissipation plate 2 to complete the preprocessing of each part of the connection structure.

[0055] Embed the in-place embedded part 1, anchor bolts 5 and connection anchors, and then pour the concrete bottom plate. At the construction site, install the in-place embedded part 1, as well as the anchor bolts 5 and the anchoring baffle connecting embedded part 7 according to the SC module wall structure, and then pour the concrete foundation bottom plate to complete the installation. If the in-place embedded part 1 is installed in the form of secondary pouring, the in-place embedded part 1 can be installed after the concrete of the bottom plate is poured. The elevation of the in-place embedded part 1 is controlled according to the need for the in-place of the SC module wall structure.

[0056] Lift the SC module wall structure and install the external anchoring baffle system and the energy dissipation anchoring plate. Lift the prefabricated SC module wall structure, install the SC module wall structure on the support plate of the in-place embedded part 1 according to the design, and connect it in the form of spot welding. The length, fillet size and spacing of the weld are determined by calculation to ensure that the weld can be damaged under seismic action and the SC module wall structure can slide freely. To ensure the installation accuracy, the lower friction energy dissipation plate 2 is constructed on-site and welded to the SC module wall structure. In other embodiments, to reduce the on-site construction difficulty and improve the construction efficiency, the lower friction energy dissipation plate 2 can also be welded and connected during the factory prefabrication stage of the SC module wall structure.

[0057] Embed a brass sheet 8 in the accommodation groove between the upper friction energy dissipation plate 4 and the lower friction energy dissipation plate to improve the friction energy dissipation capacity. The anchor bolts 5 pass through the anchor bolt holes and are connected to the upper friction energy dissipation plate 4. The two friction energy dissipation plates are pressed tightly by applying prestress through the anchor bolts 5 to ensure the fitting of the two friction energy dissipation plates. First, weld the upper friction energy dissipation plate 4 to the anchoring baffle 6, and then weld the anchoring baffle 6 to the anchoring baffle connecting embedment 7 to complete the installation of the external anchoring baffle system. In other embodiments, if the anchor bolts 5 need to be cut off, first install the external anchoring baffle system, then temporarily install the upper friction energy dissipation plate 4 in place, tighten the anchor bolts 5, weld the upper friction energy dissipation plate 4 to the anchoring baffle 6, and finally cut off the anchor bolts 5.

[0058] Pour concrete into the steel plate structure of the SC module wall structure to complete the connection between the SC module wall structure and the nuclear island foundation floor slab.

[0059] This invention solves the problems existing in the installation process of the existing SC module wall structure and the nuclear island concrete foundation floor slab in the nuclear power plant construction project, such as easy collision, difficult positioning, and large seismic response of the main structure after installation leading to structural damage. Compared with the prior art, this embodiment has the advantages of more convenient on-site construction, higher hoisting and positioning accuracy, and improved seismic performance of the SC module wall structure.

[0060] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The assembled shock-absorbing and energy-dissipating connection structure for the wall structure of the nuclear island SC module, characterized in that, It includes in-place embedded parts, an external anchoring baffle system, an energy-dissipating anchoring structure, and anchor bolts. The in-place embedded parts are arranged at the bottom of the SC module wall structure, and embedded anchor parts are provided at the bottom of the in-place embedded parts for connection with the foundation slab. The energy-dissipating anchoring structure includes two friction energy-dissipating plates, which are respectively connected to the external anchoring baffle system and the outer surface of the SC module wall structure. The two friction energy-dissipating plates are distributed vertically and can slide relative to each other along the contact surface to dissipate energy. Anchor bolt holes are provided on the friction energy-dissipating plates, and the anchor bolts pass through the anchor bolt holes to be connected with the foundation slab. The external anchoring baffle system includes an anchoring baffle and an anchoring baffle connection embedded part. The anchoring baffle is composed of a vertical plate, a horizontal plate, and a stiffening plate. The anchoring baffle connection embedded part is pre-embedded before the foundation slab is poured, and the anchoring baffle is welded to the anchoring baffle connection embedded part. The two friction energy-dissipating plates are an upper friction energy-dissipating plate and a lower friction energy-dissipating plate. The upper friction energy-dissipating plate is connected to the external anchoring system, and the lower friction energy-dissipating plate is connected to the outer surface of the SC module wall structure. A friction plate made of a metal material is embedded between the bottom of the upper friction energy-dissipating plate and the top of the lower friction energy-dissipating plate. An energy-dissipating damper is provided between the lower friction energy-dissipating plate and the external anchoring system.

2. The assembled shock-absorbing and energy-dissipating connection structure for the wall structure of the nuclear island SC module according to claim 1, wherein The bottom of the anchoring baffle connection embedded part is connected to the foundation slab by anchor bolts.

3. An assembled shock-absorbing and energy-dissipating connection structure for the wall structure of the nuclear island SC module according to claim 1, characterized in that The in-place embedded part includes a support plate and an embedded anchor part at the bottom. The embedded anchor part is pre-embedded before the foundation slab is poured, and the embedded anchor part is welded to the support plate. The in-place embedded anchor part is connected to the foundation slab by anchor bolts.

4. The assembled shock-absorbing and energy-dissipating connection structure for the wall structure of the nuclear island SC module according to claim 1, wherein, The friction plate made of the metal material is a brass plate.

5. The assembled shock-absorbing and energy-dissipating connection structure of the nuclear island SC module wall structure according to claim 1, characterized in that, Stiffening ribs are provided at the bottom of the lower friction energy-dissipating plate.

6. The assembled shock-absorbing and energy-dissipating connection structure for the wall structure of the nuclear island SC module according to claim 1, wherein, Grooves are provided on the lower friction energy-dissipating plate, and the positions of the grooves are adapted to the anchor bolt holes.

7. The construction method of the assembled shock-absorbing and energy-dissipating connection structure for the nuclear island SC module wall structure according to any one of claims 1-6, characterized in that, It includes the following steps: Fabricate the SC module wall structure and the energy-dissipating anchoring structure. Pre-embed the in-place embedded parts, anchor bolts, and anchoring baffle connection embedded parts, and then pour the concrete foundation slab. Lift the SC module wall structure onto the in-place embedded parts, and install the external anchoring baffle system and the energy-dissipating anchoring structure. Pour concrete into the steel plate structure of the SC module wall structure.

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