A waterproof structure for construction engineering and a construction method thereof

Abstract

This invention discloses a waterproof structure and its construction method for building engineering, relating to the field of waterproofing technology for expansion joints in building engineering. The invention includes an elastic shell, with a transmission structure symmetrically and uniformly arranged around its center point within the inner cavity of the elastic shell. A connecting structure is slidably connected to the outer surface of the transmission structure, and splicing structures are symmetrically arranged on both sides of the connecting structure. A sliding snap-fit ​​structure is fixedly connected to the lower part of the outer surface of the elastic shell. A sealing shell is snap-fitted to one side of the elastic shell via the splicing structure. Through the snap-fit ​​structure and sliding ball bearing assembly, the sliding friction between the sliding frame and the snap-fit ​​block is converted into rolling friction, significantly reducing the splicing sliding resistance, decreasing the difficulty and intensity of manual assembly, and making the sliding assembly of the elastic shell and its inner cavity components smoother and more precise. This effectively improves the splicing efficiency of the waterproof structure. Through the snap-fit ​​cooperation between the connecting pin and the positioning groove of the transmission frame, rapid and precise docking of each section of the waterproof structure is achieved, ensuring the integrity and regularity of the overall structure.

Description

Technical Field

[0001] This invention relates to the field of waterproofing technology for expansion joints in building engineering, and in particular to a waterproofing structure for building engineering and its construction method. Background Technology

[0002] Expansion joints in building construction are structural gaps specifically designed into buildings or structures. Their main purpose is to allow the structure to expand and contract freely under the influence of environmental factors such as temperature and humidity changes, preventing destructive stress or cracks. After installation, expansion joints need to be waterproofed to prevent rainwater from seeping into the structure and corroding the internal steel reinforcement. Corroded steel reinforcement expands, generating enormous internal stress, which can cause the surrounding concrete to crack, severely weakening the structure's load-bearing capacity and durability.

[0003] A search revealed Chinese invention patent publication number CN120556611B, which discloses a waterproof structure for construction expansion joints in building engineering. The structure includes two sets of symmetrically arranged bonding plates on both sides of an installation body. Two sets of symmetrically arranged round rods are fixedly installed on the opposite surfaces of each set of bonding plates, and these rods are slidably inserted into the interior of the installation body. Strip plates are fixedly connected to the ends of the two sets of round rods on the same side, and these strip plates are elastically connected to the inner wall of the installation body via connecting springs sleeved on the surface of the round rods. Two sets of traction ropes are symmetrically installed on the side of each set of strip plates near the center of the installation body, with the ropes staggered. A winding wheel is fixedly connected to the end of each set of traction ropes, and a trigger rod is inserted inside the winding wheel. Two sets of mating teeth are sleeved on the surface of the trigger rod. This invention, through the coordinated use of its various components, enables rapid installation during waterproofing construction of expansion joints, saving time and accelerating the process.

[0004] Existing waterproof structures suffer from high friction between components during assembly, requiring significant manpower for pushing and making it difficult to control assembly precision. This leads to misalignment and poor sealing of the joints. Assembly methods relying solely on snap-fit ​​or simple bolt fixing have weak resistance to external interference and are prone to loosening or disassembly due to factors such as building vibration and temperature deformation. Furthermore, when the expansion joints of the waterproof structure deform, stress tends to concentrate in localized areas, causing fatigue damage to elastic materials and shortening the service life of the waterproof structure.

[0005] Therefore, the existing waterproofing structure and construction method for building engineering cannot meet the needs of actual use, so there is an urgent need for improved technology in the market to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a waterproof structure for building engineering and its construction method, which solves the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a waterproof structure for building engineering and its construction method, comprising an elastic shell, wherein a transmission structure is symmetrically and uniformly arranged along the center point of the inner cavity of the elastic shell, a connecting structure is slidably connected to the outer surface of the transmission structure, splicing structures are symmetrically arranged on both the left and right sides of the connecting structure, a sliding snap-fit ​​structure is fixedly connected to the lower part of the outer surface of the elastic shell, a snap-fit ​​structure is slidably connected to the inner cavity of the sliding snap-fit ​​structure, and a sealing shell is snap-fitted to one side of the elastic shell through the splicing structure.

[0008] Preferably, the transmission structure includes a transmission frame symmetrically and uniformly fixedly connected to the inner wall of the elastic shell cavity. A transmission rod is rotatably connected to the inner cavity of the transmission frame. A connecting frame is rotatably connected to the side of the transmission rod away from the transmission frame. A connecting slider is fixedly connected to the middle of the inner cavity of the connecting frame. A connecting structure is provided on the outer surface of the connecting frame.

[0009] Preferably, the connecting structure includes a connecting plate slidably connected to the outer surface of the connecting frame, a sliding rod fixedly connected to the middle of the inner cavity of the connecting plate, the sliding rod passing through the connecting slider and slidably connected, a connecting spring movably sleeved on the outer surface of the sliding rod, a connecting spring drivingly connecting two adjacent connecting sliders, and spring auxiliary structures evenly arranged on the front and rear end faces of the connecting plate.

[0010] Preferably, the spring auxiliary structure includes sliding grooves evenly opened on the front and rear end faces of the transmission frame, an auxiliary spring is fixedly connected to the inner cavity of the sliding groove, a connecting column is slidably connected to the inner cavity of the sliding groove, an auxiliary spring is transmitted between the connecting column and the sliding groove, a universal joint is hinged to the end of the connecting column away from the connecting plate, and the end of the universal joint away from the connecting column is fixedly connected to the elastic shell through a bracket.

[0011] Preferably, the splicing structure includes positioning grooves symmetrically opened on the left and right sides of the transmission frame, with connecting pins slidably connected to the inner cavity of the positioning grooves, and the inner cavity of the positioning grooves and the connecting pins are connected by an transition fit.

[0012] Preferably, the sliding snap-fit ​​structure includes a sliding frame fixedly connected to the lower part of the outer surface of the elastic shell, threaded grooves are evenly opened on the front and rear end faces of the sliding frame, snap-fit ​​bolts are threadedly connected to the inner cavity of the threaded grooves, and a snap-fit ​​structure is slidably connected to the inner cavity of the sliding frame.

[0013] Preferably, the snap-fit ​​structure includes a snap-fit ​​block slidably connected to the inner cavity of the sliding frame, a snap-fit ​​frame fixedly connected to the lower end of the snap-fit ​​block, and mounting grooves evenly opened on the front and rear end faces of the snap-fit ​​block, with sliding balls snapped into the inner cavity of the mounting groove.

[0014] Preferably, the inner cavity of the sealing housing is symmetrically fixedly connected with connecting pins on the side near the elastic housing, the sealing housing is made of elastic corrugated material, and the elastic housing is made of elastic material.

[0015] A construction method for waterproof structures in building engineering, characterized by comprising the following steps: S1: Clean the expansion joint; remove laitance, dust and debris from the base surface, and level any uneven areas to ensure that the base surface on both sides of the expansion joint is flat. S2: Splicing waterproof structure; Select the corresponding snap-fit ​​structure according to the length of the expansion joint. At this time, the personnel slide the elastic shell and the inner cavity component of the elastic shell onto the outer surface of the snap-fit ​​block through the sliding frame. When the sliding frame slides, the friction between the sliding frame and the snap-fit ​​block is converted into the rotation of the sliding ball through the rolling of the sliding ball. At the same time, the connecting pins are snapped into the positioning grooves of the inner cavities of the two adjacent transmission frames, thus realizing the splicing between the waterproof structures. Furthermore, through the connecting pins of the sealing shell cavity, the sealing shell is installed on both sides of the spliced ​​waterproof structure located on the elastic shell, thereby realizing the sealing of the inner cavity of the spliced ​​elastic shell. Further, the snap-fit ​​bolts are rotated in sequence, so that the snap-fit ​​bolts pass through the snap-fit ​​frame and are threadedly connected to the threaded groove, thereby fixing the spliced ​​waterproof structure. S3: Install the waterproof structure; the relative compression of the curved surfaces on both sides of the elastic shell causes the transmission rods on both sides of the connecting structure to rotate relative to each other. Therefore, the connecting slider slides along the slide rod towards the center point of the inner cavity of the elastic shell, thereby causing the connecting spring to contract. At the same time, when the elastic shell deforms, the connection between the elastic shell and the universal joint moves away from each other, thereby causing the connecting column to slide relative to each other. Therefore, the auxiliary spring extends, so that the outer dimensions of the elastic shell can be adapted to the gap of the inner cavity of the expansion joint. Thus, the snap-fit ​​structure and the sliding snap-fit ​​structure on the outer surface of the elastic shell are placed towards the inner wall of the expansion joint, thereby installing the spliced ​​waterproof device into the inner cavity of the expansion joint.

[0016] The present invention has the following beneficial effects: 1. This invention utilizes a snap-fit ​​structure combined with sliding ball bearing assembly to transform the sliding friction between the sliding frame and the snap-fit ​​block into rolling friction. This significantly reduces the resistance to splicing and sliding, decreases the difficulty and intensity of manual assembly, and makes the sliding assembly of the elastic shell and its internal components smoother and more precise. This effectively improves the efficiency of waterproof structure splicing and shortens the construction cycle. Through the snap-fit ​​engagement of the connecting pin and the positioning groove of the transmission frame, rapid and precise docking of each section of the waterproof structure is achieved, effectively avoiding defects such as misalignment, offset, and incomplete overlap, ensuring the integrity and regularity of the overall structure. Simultaneously, sealing shells are installed on both sides of the elastic shell to form a fully enclosed protection for the spliced ​​internal cavity, sealing the splicing gaps and preventing water vapor infiltration. This solves the problem of easy leakage at the joints of traditional segmented waterproof structures and improves the overall sealing and seepage prevention performance.

[0017] 2. This invention utilizes a threaded locking structure consisting of snap-fit ​​bolts, a snap-fit ​​bracket, and threaded grooves to reliably limit and fix the assembled waterproof structure, ensuring its stable installation within the expansion joint. This effectively resists structural loosening and displacement caused by construction vibrations and minor building settlement, preventing the waterproof structure from detaching and failing. It significantly improves installation firmness and overall stability. The transmission rod, connecting slider, slide rod, and double spring assembly work together to form an adaptive deformation adjustment structure. The compression of the elastic shell drives the transmission rod to rotate, causing the connecting slider to compress the connecting spring. The auxiliary spring is then stretched through the universal joint and connecting column. The shell's dimensions are adjusted by the coordinated deformation of the two springs, adapting to expansion joints with varying gaps. No on-site cutting or modification is required, effectively improving product adaptability and versatility, and broadening its application range. The elastic buffer system formed by the two springs not only meets the deformation adaptation requirements during installation but also expands and contracts synchronously with the dynamic changes in the expansion joint gap due to thermal expansion and contraction and natural settlement during long-term building use. This effectively buffers and dissipates the tensile and compressive stresses generated by building deformation, preventing shell cracking and failure, continuously ensuring the sealing and waterproofing effect of the expansion joint, extending the structural service life, and improving waterproof durability.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the waterproof structure splicing structure of the present invention; Figure 2 This is a schematic diagram of the splicing structure of the waterproof structure and the sealed shell of the present invention; Figure 3 This is a front-view three-dimensional structural diagram of the waterproof structure of the present invention; Figure 4 This is a longitudinal half-section three-dimensional structural diagram of the waterproof structure of the present invention; Figure 5 This is a schematic diagram of the installation structure of the transmission structure of the present invention; Figure 6 This is a schematic diagram of the sliding snap-fit ​​structure and the installation structure of the snap-fit ​​structure of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram of region A in the middle.

[0021] The attached diagram lists the components represented by each number as follows: 1. Elastic housing; 2. Transmission structure; 21. Transmission frame; 22. Transmission rod; 23. Connecting frame; 24. Connecting slider; 3. Connecting structure; 31. Connecting plate; 32. Slide rod; 33. Connecting spring; 34. Spring auxiliary structure; 341. Sliding groove; 342. Auxiliary spring; 343. Connecting column; 344. Universal joint; 4. Splicing structure; 41. Positioning groove; 42. Connecting pin; 5. Sliding snap-fit ​​structure; 51. Sliding frame; 52. Threaded groove; 53. Snap-fit ​​bolt; 6. Snap-fit ​​structure; 61. Snap-fit ​​block; 62. Snap-fit ​​frame; 63. Sliding ball; 7. Sealing housing. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] Please see Figure 1-7 As shown, this embodiment is a waterproof structure for building engineering and its construction method, including an elastic shell 1. A transmission structure 2 is symmetrically and evenly arranged along the center point of the inner cavity of the elastic shell 1. A connecting structure 3 is slidably connected to the outer surface of the transmission structure 2. A splicing structure 4 is symmetrically arranged on both the left and right sides of the connecting structure 3. A sliding snap-fit ​​structure 5 is fixedly connected to the lower part of the outer surface of the elastic shell 1. A snap-fit ​​structure 6 is slidably connected to the inner cavity of the sliding snap-fit ​​structure 5. A sealing shell 7 is snap-fitted to one side of the elastic shell 1 through the splicing structure 4.

[0024] Furthermore, the transmission structure 2 includes a transmission frame 21 symmetrically and uniformly fixedly connected to the inner wall of the elastic shell 1. A transmission rod 22 is rotatably connected to the inner cavity of the transmission frame 21. A connecting frame 23 is rotatably connected to the side of the transmission rod 22 away from the transmission frame 21. A connecting slider 24 is fixedly connected to the middle of the inner cavity of the connecting frame 23. A connecting structure 3 is provided on the outer surface of the connecting frame 23. Through the transmission structure 2 on the elastic shell 1, the device can adapt to and be placed in the inner cavity of expansion joints with different gap sizes through the transmission of the transmission rod 22 and the cooperation of the elastic shell 1. Then, through the sliding of the connecting frame 23 and the connecting slider 24, the device can fit tightly against the side wall of the expansion joint. At the same time, since the elastic shell 1 adopts a hyperboloid biomimetic design, it generates uniform radial contraction when subjected to external pressure, avoiding the stress concentration phenomenon that is prone to occur in traditional flat plate structures.

[0025] Furthermore, the connecting structure 3 includes a connecting plate 31 slidably connected to the outer surface of the connecting frame 23. A slide rod 32 is fixedly connected to the middle of the inner cavity of the connecting plate 31. The slide rod 32 passes through the connecting slider 24 and is slidably connected. A connecting spring 33 is movably sleeved on the outer surface of the slide rod 32. A connecting spring 33 is connected between two adjacent connecting sliders 24. Spring auxiliary structures 34 are evenly arranged on the front and rear end faces of the connecting plate 31. Through the connecting structure 3 on the transmission structure 2, the splicing structure 4 and the transmission structure 2 are connected and installed through the connecting plate 31 during use. Then, the compression force transmitted by the transmission structure 2 is stored and released in the opposite direction by the extension and contraction of the connecting spring 33, so that the elastic shell 1 can fit tightly with the inner cavity of the expansion joint with the cooperation of the transmission structure 2.

[0026] Furthermore, the spring auxiliary structure 34 includes sliding grooves 341 evenly distributed on the front and rear end faces of the transmission frame 21. An auxiliary spring 342 is fixedly connected to the inner cavity of the sliding groove 341. A connecting column 343 is slidably connected to the inner cavity of the sliding groove 341. The auxiliary spring 342 is transmitted between the connecting column 343 and the sliding groove 341. A universal joint 344 is hinged to the end of the connecting column 343 away from the connecting plate 31. The end of the universal joint 344 away from the connecting column 343 is fixedly connected to the elastic shell 1 through a bracket. Through the spring auxiliary structure 34 on the connecting structure 3, the waterproof structure is given good dynamic adaptability through the synergistic buffering mechanism of the connecting spring 33, the auxiliary spring 342 and the universal joint 344 during use. It can effectively cope with the dynamic deformation of the expansion joints of the building structure caused by temperature changes and foundation settlement, and maintain the structural integrity and sealing performance during the deformation process.

[0027] Furthermore, the splicing structure 4 includes positioning grooves 41 symmetrically opened on the left and right sides of the transmission frame 21. The inner cavity of the positioning groove 41 is slidably connected with a connecting pin 42. The inner cavity of the positioning groove 41 and the connecting pin 42 are connected by a transition fit. Through the splicing structure 4 on the connecting structure 3, the connecting pin 42 is precisely engaged with the positioning groove 41 in the inner cavity of the adjacent transmission frame 21 during use, realizing rigid positioning and tight connection between the waterproof structures. This avoids problems such as misalignment and excessive gaps during splicing, ensuring the overall continuity of the waterproof structure after splicing. It also eliminates the risk of leakage caused by weak connection at the splicing joint from the splicing stage, providing a core guarantee for the integrity of the waterproof system.

[0028] Furthermore, the sliding snap-fit ​​structure 5 includes a sliding frame 51 fixedly connected to the lower part of the outer surface of the elastic shell 1. Threaded grooves 52 are evenly opened on the front and rear end faces of the sliding frame 51. Snap-fit ​​bolts 53 are threadedly connected to the inner cavity of the threaded grooves 52. A snap-fit ​​structure 6 is slidably connected to the inner cavity of the sliding frame 51. Through the sliding snap-fit ​​structure 5 on the elastic shell 1, the elastic shell 1 and the inner cavity components are slidably fitted onto the outer surface of the snap-fit ​​block 61 via the sliding frame 51 during use. During the sliding process, the sliding balls 63 convert the sliding friction between the sliding frame 51 and the snap-fit ​​block 61 into rolling friction, significantly reducing splicing resistance, significantly reducing the labor intensity of construction workers, shortening splicing time, and adapting to the rapid construction needs of building projects.

[0029] Furthermore, the snap-fit ​​structure 6 includes a snap-fit ​​block 61 slidably connected to the inner cavity of the sliding frame 51. A snap-fit ​​frame 62 is fixedly connected to the lower end of the snap-fit ​​block 61. The front and rear end faces of the snap-fit ​​block 61 are evenly provided with installation grooves. Sliding balls 63 are snapped into the inner cavity of the installation grooves. Through the snap-fit ​​structure 6 on the sliding snap-fit ​​structure 5, the snap-fit ​​bolt 53 is rotated during use to make it pass through the snap-fit ​​frame 62 and the threaded groove 52 to achieve a threaded connection. This provides a firm mechanical locking force for the spliced ​​waterproof structure. Compared with the simple snap-fit ​​structure, the threaded connection has stronger tensile and shear resistance, which can effectively resist the influence of external forces such as building structure deformation and vibration on the waterproof structure, prevent the splicing parts from loosening or disengaging, and ensure the long-term stable operation of the waterproof structure.

[0030] Furthermore, connecting pins 42 are symmetrically fixedly connected to the inner cavity of the sealing shell 7 near the elastic shell 1. The sealing shell 7 is made of elastic corrugated material, and the elastic shell 1 is made of elastic material. Through the sealing shell 7 on the elastic shell 1, the sealing shell 7 is installed on both sides of the elastic shell 1 through the connecting pins 42 in the inner cavity of the sealing shell 7 during use, forming a secondary seal for the inner cavity of the elastic shell 1. This complements the snap-fit ​​structure 6 at the splicing point, constructing a dual protection system of "splicing positioning + inner cavity sealing", completely blocking the channels for moisture to penetrate from the splicing seam and inner cavity, and greatly improving the waterproof reliability.

[0031] A construction method for waterproof structures in building engineering, characterized by comprising the following steps: S1: Clean the expansion joint; remove laitance, dust and debris from the base surface, and level any uneven areas to ensure that the base surface on both sides of the expansion joint is flat. S2: Splicing waterproof structure; Select the corresponding snap-fit ​​structure 6 according to the length of the expansion joint. At this time, the personnel slide the elastic shell 1 and the inner cavity component of the elastic shell 1 onto the outer surface of the snap-fit ​​block 61 through the sliding frame 51. When the sliding frame 51 slides, the friction between the sliding frame 51 and the snap-fit ​​block 61 is converted into the rotation of the sliding ball 63 by the rolling of the sliding ball 63. At the same time, the connecting pin 42 is snapped into the positioning groove 41 of the inner cavity of the two adjacent transmission frames 21 respectively, thereby realizing the splicing between the waterproof structures. Furthermore, through the connecting pin 42 of the inner cavity of the sealing shell 7, the sealing shell 7 is installed on both sides of the spliced ​​waterproof structure located on the elastic shell 1, thereby realizing the sealing of the inner cavity of the spliced ​​elastic shell 1. Further, the snap-fit ​​bolt 53 is rotated in sequence, so that the snap-fit ​​bolt 53 passes through the snap-fit ​​frame 62 and is threadedly connected to the threaded groove 52, thereby fixing the spliced ​​waterproof structure. S3: Install the waterproof structure; the relative compression of the curved surfaces on both sides of the elastic shell 1 causes the transmission rods 22 on both sides of the connecting structure 3 to rotate relative to each other. Therefore, the connecting slider 24 slides along the slide rod 32 toward the center point of the inner cavity of the elastic shell 1, thereby causing the connecting spring 33 to contract. At the same time, when the elastic shell 1 deforms, the connection between the elastic shell 1 and the universal joint 344 moves away from each other, thereby causing the connecting column 343 to slide relative to each other. Therefore, the auxiliary spring 342 extends, thus enabling the outer dimensions of the elastic shell 1 to adapt to the gap of the inner cavity of the expansion joint. Then, the outer surface snap-fit ​​structure 6 and the sliding snap-fit ​​structure 5 of the elastic shell 1 are placed toward the inner wall of the expansion joint, and the spliced ​​waterproof device is installed in the inner cavity of the expansion joint.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waterproof structure for building engineering, comprising an elastic shell (1), characterized in that; The inner cavity of the elastic shell (1) is symmetrically and uniformly provided with a transmission structure (2) along the center point. The outer surface of the transmission structure (2) is slidably connected with a connecting structure (3). The left and right sides of the connecting structure (3) are symmetrically provided with splicing structures (4). The lower part of the outer surface of the elastic shell (1) is fixedly connected with a sliding snap-fit ​​structure (5). The inner cavity of the sliding snap-fit ​​structure (5) is slidably connected with a snap-fit ​​structure (6). One side of the elastic shell (1) is snap-fit ​​connected with a sealing shell (7) through the splicing structure (4).

2. The waterproof structure for building engineering according to claim 1, characterized in that, The transmission structure (2) includes a transmission frame (21) symmetrically and uniformly fixedly connected to the inner wall of the elastic shell (1). A transmission rod (22) is rotatably connected to the inner cavity of the transmission frame (21). A connecting frame (23) is rotatably connected to the side of the transmission rod (22) away from the transmission frame (21). A connecting slider (24) is fixedly connected to the middle of the inner cavity of the connecting frame (23). A connecting structure (3) is provided on the outer surface of the connecting frame (23).

3. The waterproof structure for building engineering according to claim 1, characterized in that, The connecting structure (3) includes a connecting plate (31) slidably connected to the outer surface of the connecting frame (23). A slide rod (32) is fixedly connected to the middle of the inner cavity of the connecting plate (31). The slide rod (32) passes through the connecting slider (24) and is slidably connected. A connecting spring (33) is movably sleeved on the outer surface of the slide rod (32). A connecting spring (33) is connected between two adjacent connecting sliders (24). Spring auxiliary structures (34) are evenly arranged on the front and rear end faces of the connecting plate (31).

4. A waterproof structure for building engineering according to claim 1, characterized in that, The spring auxiliary structure (34) includes sliding grooves (341) evenly opened on the front and rear end faces of the transmission frame (21). An auxiliary spring (342) is fixedly connected to the inner cavity of the sliding groove (341). A connecting column (343) is slidably connected to the inner cavity of the sliding groove (341). An auxiliary spring (342) is connected to the connecting column (343) and the sliding groove (341) through transmission. A universal joint (344) is hinged to the end of the connecting column (343) away from the connecting plate (31). The end of the universal joint (344) away from the connecting column (343) is fixedly connected to the elastic shell (1) through a bracket.

5. A waterproof structure for building engineering according to claim 1, characterized in that, The splicing structure (4) includes positioning grooves (41) symmetrically opened on the left and right sides of the transmission frame (21). A connecting pin (42) is slidably connected to the inner cavity of the positioning groove (41). The inner cavity of the positioning groove (41) and the connecting pin (42) are connected by a transition fit.

6. A waterproof structure for building engineering according to claim 1, characterized in that, The sliding snap-fit ​​structure (5) includes a sliding frame (51) fixedly connected to the lower part of the outer surface of the elastic shell (1). The sliding frame (51) has threaded grooves (52) evenly opened on the front and rear end faces. The inner cavity of the threaded groove (52) is threaded with snap-fit ​​bolts (53). The inner cavity of the sliding frame (51) is slidably connected with a snap-fit ​​structure (6).

7. A waterproof structure for building engineering according to claim 1, characterized in that, The snap-fit ​​structure (6) includes a snap-fit ​​block (61) that is slidably connected to the inner cavity of the sliding frame (51). A snap-fit ​​frame (62) is fixedly connected to the lower end of the snap-fit ​​block (61). Mounting grooves are evenly provided on the front and rear end faces of the snap-fit ​​block (61). Sliding balls (63) are snapped into the inner cavity of the mounting groove.

8. A waterproof structure for building engineering according to claim 1, characterized in that, The sealing housing (7) has a connecting pin (42) symmetrically fixedly connected to the side of the inner cavity of the sealing housing (7) near the elastic housing (1). The sealing housing (7) is made of elastic corrugated material, and the elastic housing (1) is made of elastic material.

9. A construction method for a waterproof structure in a building engineering project according to claims 1-8, characterized in that, Specifically, the following steps are included: S1: Clean the expansion joint; remove laitance, dust and debris from the base surface, and level any uneven areas to ensure that the base surface on both sides of the expansion joint is flat. S2: Splicing waterproof structure; Select the corresponding snap-fit ​​structure (6) according to the length of the expansion joint. At this time, the personnel will slide the elastic shell (1) and the inner cavity component of the elastic shell (1) onto the outer surface of the snap-fit ​​block (61) through the sliding frame (51). When the sliding frame (51) slides, the sliding ball (63) rolls, and the friction between the sliding frame (51) and the snap-fit ​​block (61) is converted into the rotation of the sliding ball (63). At the same time, the connecting pin (42) is snapped into the positioning groove (41) of the inner cavity of the two adjacent transmission frames (21) respectively, so as to realize the splicing between the waterproof structures. Furthermore, through the connecting pin (42) of the inner cavity of the sealing shell (7), the sealing shell (7) is installed on both sides of the spliced ​​waterproof structure located on the elastic shell (1), so as to realize the sealing of the inner cavity of the spliced ​​elastic shell (1). Further, the snap-fit ​​bolt (53) is rotated in sequence, so that the snap-fit ​​bolt (53) passes through the snap-fit ​​frame (62) and the threaded groove (52) for threaded connection, thereby realizing the fixing of the spliced ​​waterproof structure. S3: Install the waterproof structure; relative compression of the curved surfaces on both sides of the elastic shell (1) causes the transmission rods (22) on both sides of the connecting structure (3) to rotate relative to each other. Therefore, the connecting slider (24) slides along the sliding rod (32) toward the center point of the inner cavity of the elastic shell (1), thereby causing the connecting spring (33) to contract. At the same time, when the elastic shell (1) deforms, the connection between the elastic shell (1) and the universal joint (344) moves away from each other, thereby causing the connecting column (343) to slide relative to each other. Therefore, the auxiliary spring (342) extends, thus enabling the outer dimensions of the elastic shell (1) to adapt to the gap of the inner cavity of the expansion joint. Then, the outer surface snap-fit ​​structure (6) and the sliding snap-fit ​​structure (5) of the elastic shell (1) are placed on the side of the inner wall of the expansion joint, and the spliced ​​waterproof device is installed in the inner cavity of the expansion joint.

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