Nuclear power station CR10 module integral in-place advance structure and construction method

Abstract

The invention provides a nuclear power station CR10 module integral in-place advance structure and a construction method, the nuclear power station CR10 module integral in-place advance structure comprises a CR10 module and a lower support system, the CR10 module is a symmetrical gradient annular structure formed by rigidly connecting a plurality of CR10 units; the lower supporting system is of a symmetrical annular structure which is formed by connecting a concrete pier, a supporting steel column, a steel beam, a channel steel inclined strut, a channel steel transverse strut and a steel base plate and matched with the projection outline of the CR10 module, and the CR10 module is connected with the lower supporting system and arranged on a nuclear island bottom plate. The construction method comprises the steps of pre-construction, installation of the lower supporting system and hoisting of the CR1O module in place. The positioning method comprises laser positioning, strong magnetic positioning and cooperative positioning of the laser positioning and the strong magnetic positioning. The problems that in-place precision of traditional construction is low, the number of construction cross operations is large, and construction efficiency is low are solved.

Description

Technical Field

[0001] The invention relates to the field of nuclear industry building construction, and in particular to a nuclear power plant CR10 module overall advance placement structure and a construction method. Background Art

[0002] The CAP1000 reactor type CR10 module is a steel containment bottom head, referred to as the steel structure support of CVBH. Its structure is composed of 16 CR10 units and steel beams, column supports and tie rods between the units. Its main function is to support and fix the CVBH.

[0003] The CR10 module installation has high accuracy requirements. To ensure that the installation elevation and horizontal deviation meet the requirements, the traditional construction method is to hoist 16 units into place after the nuclear island floor concrete is poured, and then level and install the C2 outrigger column. Only then can the upper steel bar binding of the CR10 module be started. It has the following defects: the traditional method often occupies the main critical path, affects the construction period, and restricts the subsequent construction work; the CR10 module has high accuracy requirements, that is, the vertical allowable deviation is ±1.6mm, and the horizontal plane is ±3.2mm in any direction. After the module is in place, it is difficult to adjust the horizontal and vertical deviations, which is easy to cause quality risks and cannot carry out subsequent steel bar binding and other processes; the hoisting of 16 CR10 units takes a long construction period, there are a lot of cross operations, and there are many on-site welding operations, which have many safety hazards and affect the construction period; the large steel structure module is placed in place with column foot anchor bolts, and the gap between the column foot and the concrete surface needs to be post-grouted. The grouting gap is only 16mm, which is difficult to construct and affects the construction period. Summary of the invention

[0004] The main purpose of the present invention is to provide a nuclear power plant CR10 module overall advance positioning structure and construction method to solve the problems of low positioning accuracy, many cross-construction operations and low construction efficiency in traditional construction.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a nuclear power plant CR10 module overall pre-placement structure, including a CR10 module and a lower support system, the CR10 module is a symmetrical gradient ring structure composed of multiple CR10 units rigidly connected, the lower support system is a symmetrical circular ring structure composed of concrete piers, supporting steel columns, steel beams, channel steel diagonal braces, channel steel cross braces and steel pads, which is compatible with the projection contour of the CR10 module. The CR10 module is connected to the lower support system and is arranged on the bottom plate of the nuclear island.

[0006] In a preferred embodiment, the CR10 module is a symmetrical gradient annular structure formed by rigidly connecting 16 CR10 units, and a plurality of annular supports at the bottom end thereof are connected with a plurality of radial supports to form a plurality of support intersections.

[0007] In the preferred embodiment, the structure of the lower support system is as follows: embedded parts are provided at the top of the concrete pier, the lower ends of the supporting steel columns are connected to the concrete pier through the embedded parts, and the supporting steel columns are connected through steel beams, channel steel diagonal braces, and channel steel horizontal braces to form fan-shaped sub-modules. The 32 groups of fan-shaped sub-modules are tightly connected through common radial edges to form a circular lower support system.

[0008] In the preferred embodiment, the vertical axis of the supporting steel column coincides with the orthographic projection of the intersection of the bracket of the CR10 module on the horizontal plane, and the steel pad at the top of the supporting steel column is fixed one by one to the intersection of the bracket through steel bars, forming a rigid connection structure between the CR10 module and the lower support system.

[0009] In the preferred embodiment, the lower support system is provided with multiple groups of annular reinforcement braces and multiple radial reinforcement braces. The annular reinforcement braces are evenly arranged in 8 groups along the circular circumference of the lower support system. Each group includes four braces, which are respectively arranged at the four coaxial circumferential edges of the fan-shaped submodule, and the central axes of adjacent groups form an angle of 45°. The radial reinforcing braces are 32 evenly spaced along the circular circumference of the lower support system, the axis of each radial reinforcing brace is consistent with the radial direction of the circular structure, and the middle of each radial reinforcing brace is fixed at the mid-span position of the corresponding steel beam.

[0010] In a preferred embodiment, a first laser emission module is provided at the installation position of the nuclear island bottom plate, which is used to project an annular laser grid along the circular contour of the lower support system; The CR10 module pre-assembly site is provided with a second laser emission module for projecting the same laser grid as the first laser emission module to assemble matching CR10 modules; The CR10 module is also provided with a laser receiving module, which is electrically connected to the CR10 module hanger and is used to capture the laser grid of the first laser emitting module and adjust the positioning.

[0011] In the preferred embodiment, a coding positioning magnetic pole array is also embedded in the steel pad at the top of the outermost ring supporting steel column of the lower supporting system, and 32 coding positioning magnetic poles are arranged at equal intervals along the circumferential direction, and the axis of each coding positioning magnetic pole coincides with the central axis of the corresponding supporting steel column; A permanent magnet array and a magnetic induction receiver array are also embedded in the column foot at the intersection of the outermost ring of the bracket at the lower end of the CR10 module. 32 permanent magnets and magnetic induction receivers are arranged at equal intervals along the circumferential direction, and the axis of each permanent magnet coincides with the central axis of the corresponding bracket intersection; The magnetic induction receiver is electrically connected to the CR10 module hanger for accurately locating the installation angle.

[0012] In a preferred embodiment, a magnetic shielding structure is provided on the periphery of the coded positioning magnetic pole and the permanent magnet to shield the stray magnetic field of the nuclear power plant.

[0013] In a preferred embodiment, a construction method for a nuclear power plant CR10 module overall advance placement structure comprises: S1. Pre-construction: Install concrete piers and embedded parts on the nuclear island floor, and weld 16 CR10 units into an integrated CR10 module at the assembly site; S2. Install the lower support system: After installing the supporting steel columns, channel steel horizontal braces, channel steel diagonal braces, steel beams and steel pads according to the concrete pier points to form a circular ring structure of the lower support system, install the annular reinforcement diagonal braces and radial reinforcement diagonal braces according to the load-bearing structure; S3. Lifting of CR10 module into place: Use extra-large lifting equipment to hoist the CR10 module as a whole to the designed point of the lower support system and connect it to form an integral steel structure support.

[0014] In a preferred embodiment, the positioning and installation method of the CR10 module includes: A1. Laser rough positioning: The first laser emitting module on the nuclear island floor and the second laser emitting module at the CR10 module pre-assembly site synchronously project the same annular laser grid to locate the assembly points and matching contours of the lower support system and the CR10 module. During the lifting and moving process, the laser receiving module provides real-time feedback on the position deviation, and the hoist automatically fine-tunes until the grid coincides. A2. Strong magnetic rough positioning: When the CR10 module is hoisted above the lower support system, the magnetic attraction between the coded positioning magnetic pole and the permanent magnet guides the initial adsorption alignment; A3. Precise positioning: The magnetic induction receiver identifies the lower support system code and locates the magnetic pole code, triggering the CR10 module to rotate to the magnetic pole matching position. The laser receiving module synchronously detects the laser grid deviation and dynamically adjusts the hanger posture.

[0015] The present invention provides a nuclear power plant CR10 module overall advance placement structure and construction method, which effectively shortens the construction period: by changing the CR10 module from unit lifting to overall lifting, and constructing the lower support system in advance, the CR10 module installation and the nuclear island bottom plate reinforcement binding are constructed in parallel, the key path is optimized, the overall lifting reduces on-site welding, adjustment and other processes, avoids cross-operation conflicts caused by multiple liftings, and improves construction efficiency.

[0016] Improve installation accuracy overall: through precise positioning between the intersection of the supporting steel column and the bracket, combined with the stability design of the annular reinforcement brace and the radial reinforcement brace, and the stability of the lower support system structure, the CR10 module is assembled with the assistance of the strong magnetic positioning machine laser grid at the assembly site to ensure the overall structural accuracy. No secondary adjustment is required after hoisting, which directly meets the accuracy requirements of subsequent steel bar binding.

[0017] Improve construction safety and reliability: cancel the traditional column foot post-grouting process, and replace it with direct welding of supporting steel columns and embedded parts to avoid the safety hazards of high-altitude grouting operations. The CR10 module is prefabricated in the workshop and assembled on site to form a modular construction, reduce on-site welds, and reduce welding quality risks.

[0018] Effectively reduce costs: The lower support system adopts a lightweight design, the concrete pier does not require complex reinforcement, and the CR10 module is hoisted in one go, reducing the cost of multiple unit hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is the overall appearance structure diagram of the CR10 module and its lower support system of the present invention; Figure 2 It is a schematic diagram of the installation plane of the concrete pier of the present invention; Figure 3 This is a side view structural diagram of the fan-shaped submodule of the lower support system of the present invention; Figure 4 It is a schematic diagram of the installation plane of the annular reinforcement brace and the radial reinforcement brace of the present invention; Figure 5 It is a side view structural diagram of the lower support system of the present invention; Figure 6 This is a planar structural diagram of the radially reinforced diagonal brace of the present invention; Figure 7 This is a plan view of the structure of the annular reinforced diagonal brace of the present invention; Figure 8 This is a schematic diagram of the installation structure of the strong magnetic positioning element of the CR10 module of the present invention; Fig. 9 It is a schematic diagram of the installation structure of the strong magnetic positioning element of the lower support system of the present invention; Fig.10 It is a connection diagram of the positioning element of the present invention.

[0020] In the figure: CR10 module 1; CR10 unit 101; annular bracket 102; radial bracket 103; bracket intersection 104; concrete pier 2; embedded part 201; supporting steel column 3; steel beam 4; channel steel diagonal brace 5; channel steel horizontal brace 6; steel pad 7; annular reinforcing diagonal brace 8; radial reinforcing diagonal brace 9; first laser emitting module 10; second laser emitting module 11; laser receiving module 12; encoding positioning magnetic pole 13; permanent magnet 14; magnetic induction receiver 15; magnetic shielding structure 16. DETAILED DESCRIPTION

[0021] Example 1 like Figures 1 to 10As shown, a nuclear power plant CR10 module overall pre-placement structure includes a CR10 module 1 and a lower support system, wherein the CR10 module 1 is a symmetrical gradient ring structure formed by rigidly connecting multiple CR10 units 101, and the lower support system is a symmetrical circular ring structure that is compatible with the projection contour of the CR10 module 1 and is formed by connecting concrete piers 2, supporting steel columns 3, steel beams 4, channel steel diagonal braces 5, channel steel cross braces 6 and steel pads 7. The CR10 module 1 is connected to the lower support system and is arranged on the bottom plate of the nuclear island.

[0022] The present application adopts an overall lifting structure after the CR10 module 1 is assembled in the factory, instead of the traditional on-site separate lifting and assembly of 16 CR10 units 101, which improves the lifting efficiency. While the CR10 module 1 is assembled in the factory, the lower support system is put in place in advance on the bottom of the nuclear island. The two are carried out simultaneously, which greatly reduces the cross-operation conflicts and the waste of construction time caused by traditional sequential operations. The lower support system is designed to be lightweight, which reduces the lifting weight while ensuring the support strength, and is of great help to improve the efficiency and safety of construction.

[0023] In a preferred embodiment, the CR10 module 1 is a symmetrical gradient annular structure formed by rigidly connecting 16 CR10 units 101, and a plurality of annular supports 102 at the bottom end thereof are connected with a plurality of radial supports 103 to form a plurality of support intersections 104.

[0024] CR10 module 1 is a symmetrical structure, with an inner ring radius of 10.668m, an outer ring radius of 21.031m, an outer ring height of 4.343m, and an elevation of -10.211m to -5.867m. After installation, the total weight of CR10 module 1 is about 109.2t. In the preferred embodiment, the structure of the lower support system is as follows: an embedded part 201 is provided at the top of the concrete pier 2, the lower end of the supporting steel column 3 is connected to the concrete pier 2 through the embedded part 201, and each supporting steel column 3 is connected through a steel beam 4, a channel steel diagonal brace 5, and a channel steel horizontal brace 6 to form a fan-shaped sub-module, and the 32 groups of fan-shaped sub-modules are tightly connected through the common radial edge to form a circular ring-shaped lower support system.

[0025] The lower support system is a lightweight steel structure support system, using 300*300*127mm thick plain concrete pier 2, each support steel column 3 corresponds to a concrete pier 2, and HW100*6*8 support steel columns are set on the pier. The support steel column 3 is welded to the embedded part 201, and the center of the embedded part 201 is the center of the support steel column 3. All components in the support system are made of Q235 grade steel.

[0026] In the preferred embodiment, the vertical axis of the supporting steel column 3 coincides with the orthographic projection of the bracket intersection 104 of the CR10 module 1 on the horizontal plane, and the steel pad 7 at the top of the supporting steel column 3 is fixed one by one to the bracket intersection 104 through steel bars, forming a rigid connection structure between the CR10 module 1 and the lower support system.

[0027] In the preferred embodiment, the lower support system is provided with multiple groups of annular reinforcement braces 8 and multiple radial reinforcement braces 9. The annular reinforcement braces 8 are evenly arranged in 8 groups along the circular circumference of the lower support system. Each group includes four braces, which are respectively arranged at the four coaxial circumferential edges of the fan-shaped submodule, and the central axes of adjacent groups form an angle of 45°. The radial reinforcing braces 9 are evenly spaced 32 in number along the circular circumference of the lower support system, the axis of each radial reinforcing brace 9 is consistent with the radial direction of the circular structure, and the middle of each radial reinforcing brace 9 is fixed at the mid-span position of the corresponding steel beam 4.

[0028] In the preferred embodiment, a first laser emitting module 10 is provided at the installation position of the nuclear island bottom plate, which is used to project an annular laser grid along the circular contour of the lower support system; The CR10 module 1 pre-assembly site is provided with a second laser emitting module 11 for projecting the same laser grid as the first laser emitting module 10 to assemble matching CR10 modules 1; The CR10 module 1 is also provided with a laser receiving module 12, which is electrically connected to the CR10 module 1 hanger and is used to capture the laser grid of the first laser emitting module 10 and adjust the positioning.

[0029] Due to the high construction elevation and large site, a high-precision laser emitting device is required, such as a green laser with a wavelength of 532nm. This structure is mainly used for preliminary positioning guidance during the lifting and lowering process and as an auxiliary means during the precise positioning process.

[0030] In the preferred embodiment, a coding positioning magnetic pole 13 array is also embedded in the steel pad 7 at the top of the outermost ring support steel column 3 of the lower support system, and 32 coding positioning magnetic poles 13 are arranged at equal intervals along the circumferential direction, and the axis of each coding positioning magnetic pole 13 coincides with the central axis of the corresponding support steel column 3; An array of permanent magnets 14 and an array of magnetic induction receivers 15 are also embedded in the column foot at the bracket intersection 104 at the outermost ring of the lower end of the CR10 module 1. 32 permanent magnets 14 and magnetic induction receivers 15 are arranged at equal intervals along the circumferential direction, and the axis of each permanent magnet 14 coincides with the central axis of the corresponding bracket intersection 104; The magnetic induction receiver 15 is electrically connected to the CR10 module 1 hanger for accurately locating the installation angle.

[0031] The coded positioning magnetic pole 13 contains the angular positioning information of the lower support system, and the magnetic induction receiver 15 can read the corresponding coded information and perform corresponding angular positioning.

[0032] During the rough magnetic positioning process, the CR10 module 1 hoist needs to overcome the large deadweight of the entire module. There may be dynamic factors such as shaking and wind during the lifting process, which requires additional magnetic force to achieve positioning adsorption and maintain stability.

[0033] When the bottom of the CR10 module 1 has a certain contact with the lower support system and generates friction, the total weight of the CR10 module 1 is still borne by the hanger. Therefore, the 32 sets of magnetic arrays are sufficient to offset the friction, achieve micro-displacement correction and angle correction, and guide it to the correct position.

[0034] In a preferred embodiment, a magnetic shielding structure 16 is provided around the coding positioning magnetic pole 13 and the permanent magnet 14 to shield the stray magnetic field of the nuclear power plant.

[0035] Components of nuclear power plants, such as nuclear measuring instruments, are sensitive to electromagnetic interference, so magnetic field leakage needs to be limited within a safe threshold. Magnetic field leakage may cause coding recognition errors and affect positioning accuracy. The magnetic shielding structure 16 can be made by wrapping high permeability materials, such as silicon steel and Permalloy, around each coding positioning magnetic pole and permanent magnet.

[0036] Example 2 Further illustrate with reference to Example 1, Figures 1 to 10 The structure shown is a construction method for the overall advance placement structure of the CR10 module of a nuclear power plant, the method comprising: S1. Pre-construction: installing concrete piers 2 and embedded parts 201 on the bottom plate of the nuclear island, and welding 16 CR10 single elements 101 into an integral CR10 module 1 at the assembly site; S2. Install the lower support system: After installing the supporting steel column 3, the channel steel horizontal brace 6, the channel steel diagonal brace 5, the steel beam 4, and the steel pad 7 according to the concrete pier 2 to form a circular ring structure of the lower support system, install the annular reinforcement diagonal brace 8 and the radial reinforcement diagonal brace 9 according to the load-bearing structure; S3. Lift CR10 module 1 into place: Use an extra-large lifting device to hoist CR10 module 1 as a whole to the designed point of the lower support system and connect it to form an integral steel structure support.

[0037] In a preferred embodiment, the positioning and installation method of the CR10 module 1 includes: A1. Laser rough positioning: The first laser emitting module 10 of the nuclear island bottom plate and the second laser emitting module 11 of the CR10 module 1 pre-assembly site synchronously project the same annular laser grid to locate the assembly points and matching contours of the lower support system and the CR10 module 1. During the lifting and moving process, the laser receiving module 12 provides real-time feedback on the position deviation, and the hoist automatically fine-tunes until the grids coincide. A2. Strong magnetic rough positioning: When the CR10 module 1 is hoisted above the lower support system, the magnetic attraction between the coding positioning magnetic pole 13 and the permanent magnet 14 guides the initial adsorption alignment; A3. Precise positioning: The magnetic induction receiver 15 identifies the coding of the lower support system and the positioning magnetic pole 13, triggering the CR10 module 1 to rotate to the magnetic pole matching position. The laser receiving module 12 synchronously detects the laser grid deviation and dynamically adjusts the hanger posture.

[0038] Laser positioning and strong magnetic positioning are redundant configurations. When the magnetic field interference exceeds the limit, it can be switched to laser positioning. When the laser visibility in the construction environment is poor, it can be switched to strong magnetic positioning.

[0039] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A nuclear power plant CR10 module overall advance placement structure, characterized by: The invention comprises a CR10 module (1) and a lower support system, wherein the CR10 module (1) is a symmetrical gradient annular structure formed by rigidly connecting a plurality of CR10 units (101), and the lower support system is a symmetrical annular structure adapted to the projection profile of the CR10 module (1) formed by connecting a concrete pier (2), a supporting steel column (3), a steel beam (4), a channel steel diagonal brace (5), a channel steel horizontal brace (6) and a steel pad (7). The CR10 module (1) is connected to the lower support system and is arranged on the bottom plate of the nuclear island.

2. According to claim 1, a nuclear power plant CR10 module overall advance placement structure is characterized by: The CR10 module (1) is a symmetrical gradient annular structure formed by rigidly connecting 16 CR10 units (101), wherein a plurality of annular supports (102) at the bottom end thereof are connected to a plurality of radial supports (103) to form a plurality of support intersections (104).

3. According to claim 1, a nuclear power plant CR10 module overall advance placement structure is characterized by: The structure of the lower support system is as follows: an embedded part (201) is provided at the top of the concrete pier (2); the lower end of the support steel column (3) is connected to the concrete pier (2) via the embedded part (201); each support steel column (3) is connected via a steel beam (4), a channel steel diagonal brace (5), and a channel steel horizontal brace (6) to form a fan-shaped submodule; 32 groups of fan-shaped submodules are tightly connected via a common radial edge to form a circular ring-shaped lower support system.

4. According to claim 1, a nuclear power plant CR10 module overall advance placement structure is characterized by: The vertical axis of the supporting steel column (3) coincides with the orthographic projection of the bracket intersection point (104) of the CR10 module (1) on the horizontal plane, and the steel pads (7) at the top ends of the supporting steel columns (3) are fixed one by one to the bracket intersection points (104) through steel bars, thereby forming a rigid connection structure between the CR10 module (1) and the lower support system.

5. According to claim 1, the overall advance placement structure of the CR10 module of a nuclear power plant is characterized by: The lower support system is provided with a plurality of groups of annular reinforcing diagonal braces (8) and a plurality of radial reinforcing diagonal braces (9), wherein the annular reinforcing diagonal braces (8) are evenly arranged in 8 groups along the circular ring circumference of the lower support system, each group comprising four diagonal braces, which are respectively arranged at the four coaxial circumferential edges of the fan-shaped submodule, and the central axes of adjacent groups form an angle of 45°; 32 radial reinforcing braces (9) are evenly spaced along the annular circumference of the lower support system, the axis of each radial reinforcing brace (9) is consistent with the radial direction of the annular structure, and the middle of each radial reinforcing brace (9) is fixed to the mid-span position of the corresponding steel beam (4).

6. According to claim 1, a nuclear power plant CR10 module overall advance placement structure is characterized by: A first laser emitting module (10) is provided at the installation location of the nuclear island bottom plate, and is used to project an annular laser grid along the circular contour of the lower support system; The CR10 module (1) pre-assembly site is provided with a second laser emission module (11) for projecting the same laser grid as the first laser emission module (10) to assemble matching CR10 modules (1); The CR10 module (1) is also provided with a laser receiving module (12), and the laser receiving module (12) is electrically connected to the CR10 module (1) hanger and is used to capture the laser grid of the first laser emitting module (10) and adjust the positioning.

7. According to claim 1, a nuclear power plant CR10 module overall advance placement structure is characterized by: An array of coding positioning magnetic poles (13) is also embedded in the steel pad (7) at the top of the outermost ring supporting steel column (3) of the lower supporting system, wherein 32 coding positioning magnetic poles (13) are arranged at equal intervals along the circumferential direction, and the axis of each coding positioning magnetic pole (13) coincides with the central axis of the corresponding supporting steel column (3); An array of permanent magnets (14) and an array of magnetic induction receivers (15) are also embedded in the column foot at the bracket intersection (104) of the outermost ring at the lower end of the CR10 module (1), and 32 permanent magnets (14) and magnetic induction receivers (15) are respectively arranged at equal intervals along the circumferential direction, and the axis of each permanent magnet (14) coincides with the central axis of the corresponding bracket intersection (104); The magnetic induction receiver (15) is electrically connected to the CR10 module (1) hanger and is used to accurately locate the installation angle.

8. The overall advance placement structure of the CR10 module of a nuclear power plant according to claim 7 is characterized by: A magnetic shielding structure (16) is provided on the periphery of the encoding positioning magnetic pole (13) and the permanent magnet (14) for shielding stray magnetic fields of the nuclear power plant.

9. The construction method of the nuclear power plant CR10 module overall advance placement structure according to any one of claims 1 to 8, characterized in that: The method includes: S1, pre-construction: installing a concrete pier (2) and its embedded parts (201) on the bottom plate of the nuclear island, and welding 16 CR10 unit elements (101) into an integral CR10 module (1) at the assembly site; S2, installing the lower support system: after the supporting steel columns (3), channel steel cross braces (6), channel steel diagonal braces (5), steel beams (4), and steel pads (7) are installed according to the points of the concrete pier (2) to form a circular ring structure of the lower support system, the annular reinforcing diagonal braces (8) and radial reinforcing diagonal braces (9) are installed according to the load-bearing structure; S3. Lifting the CR10 module (1) into place: Use an extra-large lifting device to hoist the CR10 module (1) as a whole to the designed point of the lower support system and connect it to form an integral steel structure support.

10. The construction method of the nuclear power plant CR10 module overall advance placement structure according to claim 9, characterized in that: The positioning and installation method of the CR10 module (1) comprises: A1. Laser rough positioning: The first laser emitting module (10) of the nuclear island bottom plate and the second laser emitting module (11) of the CR10 module (1) pre-assembly site synchronously project the same annular laser grid to locate the assembly points and matching contours of the lower support system and the CR10 module (1). During the lifting and moving process, the laser receiving module (12) provides real-time feedback of the position deviation, and the lifting device automatically fine-tunes until the grids coincide. A2. Strong magnetic rough positioning: When the CR10 module (1) is hoisted above the lower support system, the magnetic attraction between the coded positioning magnetic pole (13) and the permanent magnet (14) guides the initial adsorption alignment; A3. Precision positioning: The magnetic induction receiver (15) identifies the coding of the lower support system and the positioning magnetic pole (13), triggering the CR10 module (1) to rotate to the magnetic pole matching position. The laser receiving module (12) synchronously detects the laser grid deviation and dynamically adjusts the hanger posture.

Images