Cofferdam structure, waterproof bolt device and construction method thereof

Abstract

The invention discloses a cofferdam structure, a waterproof bolt device and a construction method thereof, and belongs to the technical field of building construction, and the cofferdam structure comprises a cofferdam section, a transition section and a fixing bolt. The multiple cofferdam sections are sequentially connected end to end to jointly define a containing space. A transition section is arranged between every two adjacent cofferdam sections; the fixing bolt is inserted into the transition section from the inner wall of the transition section from inside to outside in the thickness direction of the transition section. The waterproof bolt device comprises a bolt body, a waterproof sleeve, a waterproof bolt cap and a fixing sleeve. Wherein the waterproof sleeve bolt main body is arranged in the waterproof sleeve in a penetrating manner; an opening is formed in the waterproof bolt cap in the axial direction of the waterproof sleeve, the waterproof bolt cap penetrates through the waterproof sleeve and abuts against the inner wall of the waterproof sleeve, and the bolt body penetrates through the opening and is in threaded connection with the waterproof bolt cap; and the fixing sleeve can penetrate through the waterproof sleeve and is connected to the bolt main body in a sleeving manner. The waterproof bolt device construction method is applied to the waterproof bolt device.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a cofferdam structure, a waterproof bolt device and a construction method thereof. Background Art

[0002] In the construction of bridges, ports, water conservancy and hydropower projects, it is often necessary to carry out foundation construction in water. In order to create dry land construction conditions, it is usually necessary to set up a cofferdam structure to block water flow and soil and sand.

[0003] In the related technology, there are two main methods for the construction of double-walled steel cofferdam structures: one is the overall floating method, in which all the segments of the cofferdam are assembled into a whole in the factory and then transported to the pier by floating. The cofferdam constructed by this method requires a matching anchoring system, and the construction plan of first cofferdam and then platform is adopted, which has a long construction period and great construction difficulty. The other is the in-situ assembly method, in which the cofferdam is divided into multiple segments in height and plane, and the cofferdam is assembled by setting up an assembly platform and then lowered to the designed position.

[0004] Due to the large number of blocks, the connection operation between multiple blocks becomes extremely complicated and difficult. Moreover, the strength and rigidity of the cofferdam structure after the connection is completed often perform poorly. When the cofferdam is subjected to external forces such as water flow impact and soil pressure, the connection is prone to deformation or even damage, which seriously affects the construction safety and quality of the project.

[0005] In addition, bolt connection is a common connection method in the construction process of cofferdam structures. In the construction process of some cofferdam structures, long bolts are used to connect the cofferdam structures. For cofferdam structures connected by long bolts and placed underwater after assembly, bolt corrosion is often encountered.

[0006] In order to deal with the bolt corrosion problem in the connection part of the cofferdam structure, the usual method is to apply paint film. However, due to its own shape, the thickness of some paint films tends to become thinner; at the same time, in the actual construction process, it is difficult to completely remove the rust on the surface after the bolts are tightened. Rust stains often flow out in the early stage, causing rust on the bolt connection of the cofferdam structure, resulting in problems with anti-corrosion performance and aesthetics. Summary of the invention

[0007] The object of the present invention is to provide a cofferdam structure, a waterproof bolt device and a construction method thereof, so as to solve the technical problems existing in the prior art that the cofferdam structure is difficult to splice and the strength of the splicing part is poor and the underwater long bolt structure is prone to rust.

[0008] As conceived above, the technical solution adopted by the present invention is:

[0009] First, the present invention provides a cofferdam structure, comprising:

[0010] Multiple cofferdam sections are connected end to end in sequence to form a receiving space;

[0011] A transition section, wherein the transition section is arranged between two adjacent cofferdam sections;

[0012] A fixing bolt is inserted into the transition section from the inner wall of the transition section from the inside to the outside along the thickness direction of the transition section, and the fixing bolt is arranged at a first angle with the inner wall of the transition section.

[0013] Preferably, a clamping plate is provided on the transition section, a connecting plate is formed on the cofferdam section, and the clamping plate is clamped on the connecting plate.

[0014] Preferably, the first angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0015] Preferably, an anchor sleeve is fixedly connected to the transition section, and the end of the fixing bolt can be inserted into the anchor sleeve and threadedly connected to the anchor sleeve.

[0016] Preferably, a sleeve is provided on the transition section, and the sleeve extends along the insertion path of the fixing bolts, and at least part of the fixing bolts can be inserted into the sleeve.

[0017] Preferably, corresponding to each of the transition sections, two fixing bolts are provided, and the two fixing bolts are cross-arranged at a second angle.

[0018] Preferably, among the two fixing bolts, the length of one of the fixing bolts is greater than the length of the other fixing bolt.

[0019] Preferably, a supporting structure is provided on the inner wall of the transition section, the supporting structure is triangular, and the supporting structure is used to support the fixing bolt.

[0020] Secondly, the present invention provides a waterproof bolt device, comprising:

[0021] Bolt body;

[0022] A waterproof casing, wherein the bolt body is inserted into the waterproof casing;

[0023] A waterproof plug cap is formed with an opening along the axial direction of the waterproof sleeve, the waterproof plug cap is passed through the waterproof sleeve and abuts against the inner wall of the waterproof sleeve, and the bolt body is passed through the opening and is screwed to the waterproof plug cap;

[0024] The fixing sleeve can be inserted into the waterproof sleeve and sleeved on the bolt body, and at least a part of the fixing sleeve can extend into the opening and abut against the inner wall of the waterproof plug cap.

[0025] In addition, the present invention also provides a waterproof bolt device construction method, which is applied to the above-mentioned waterproof bolt device, comprising:

[0026] Fixing the fixing sleeve to the end plate, and filling the fixing sleeve with anti-rust grease;

[0027] The bolt body is passed through and screwed to the waterproof plug cap;

[0028] The bolt body and the waterproof plug cap are inserted into the waterproof sleeve so that the outer wall of the waterproof plug cap abuts against the inner wall of the waterproof sleeve;

[0029] The fixing sleeve is inserted into the waterproof sleeve and sleeved with the bolt body, and a part of the fixing sleeve is extended into the opening and abuts against the inner wall of the waterproof plug cap;

[0030] The anti-rust grease filled in the fixing sleeve is squeezed out so that the anti-rust grease is filled in the gaps among the fixing sleeve, the waterproof sleeve and the waterproof plug cap.

[0031] Beneficial effects of the present invention:

[0032] The cofferdam structure proposed in the present invention, firstly, sets a transition section between adjacent cofferdam sections. The existence of the transition section provides a special connection area for connecting adjacent cofferdam sections, making the splicing operation more convenient and efficient, and effectively solving the problem that the traditional cofferdam structure is difficult to splice. Secondly, the fixing bolts are inserted from the inner wall of the transition section from the inside to the outside along the thickness direction of the transition section, and are set at a first angle to the inner wall of the transition section, thereby enhancing the connection strength of the splicing, improving the ability of the splicing to resist external forces, and effectively reducing deformation, cracking and other problems caused by stress at the splicing, thereby enhancing the stability and safety of the entire cofferdam structure. In addition, the transition section is set to meet the force requirements of the fixing bolts, ensuring the overall stability of the cofferdam section.

[0033] The waterproof bolt device proposed in the present invention effectively isolates the bolt body from contact with external water by arranging a waterproof sleeve outside the bolt body, thereby avoiding direct erosion of the bolt body by the underwater environment from the source and reducing the possibility of bolt corrosion. The waterproof plug cap forms an opening along the axial direction of the waterproof sleeve, and the bolt body is inserted through the opening and screwed to the waterproof plug cap, which enhances the sealing of the bolt connection part and prevents moisture from penetrating from the connection gap. The fixed sleeve can be inserted through the waterproof sleeve and sleeved on the bolt body, and at least part of the fixed sleeve can extend into the opening and abut against the inner wall of the waterproof plug cap, which makes the structure of the entire bolt device more stable, and at the same time further improves the waterproof performance, effectively prevents moisture from entering the inside of the bolt, delays the rust process of the bolt, and prolongs the service life of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a structural schematic diagram of a cofferdam structure provided in Embodiment 1 of the present invention;

[0035] Figure 2 is a first structural schematic diagram of the connection between the cofferdam section and the transition section provided in the first embodiment of the present invention;

[0036] Figure 3 is a second structural schematic diagram of the connection between the cofferdam section and the transition section provided in the first embodiment of the present invention;

[0037] Figure 4 is a schematic structural diagram of an anchor sleeve provided in Embodiment 1 of the present invention;

[0038] Figure 5 is a partial structural schematic diagram of the cofferdam structure provided in the first embodiment of the present invention;

[0039] Figure 6 It is a partial structural schematic diagram of a waterproof bolt device provided in Embodiment 2 of the present invention;

[0040] Figure 7 is a schematic structural diagram of a fixed sleeve provided in Embodiment 2 of the present invention;

[0041] Figure 8 is a first structural schematic diagram of a waterproof bolt device provided in Embodiment 2 of the present invention;

[0042] Fig. 9 It is a second structural schematic diagram of the waterproof bolt device provided in the second embodiment of the present invention.

[0043] In the figure:

[0044] 1. Cofferdam section; 11. Connecting plate;

[0045] 2. Transition section; 21. Clamp; 22. Anchor sleeve; 23. Casing; 24. Support structure;

[0046] 3. Fixing bolt; 4. Bolt body; 5. Waterproof casing; 6. Waterproof plug cap; 7. Fixing sleeve; 8. End plate. DETAILED DESCRIPTION

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0050] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0051] Embodiment 1

[0052] See also Figures 1 to 5 The cofferdam structure provided by the embodiment of the present invention includes a cofferdam section 1, a transition section 2 and a fixing bolt 3. Among them, a plurality of cofferdam sections 1 are connected end to end in sequence to form a receiving space; a transition section 2 is provided between two adjacent cofferdam sections 1; and the fixing bolt 3 is inserted into the transition section 2 from the inner wall of the transition section 2 from the inside to the outside along the thickness direction of the transition section 2, and the fixing bolt 3 is provided at a first angle with the inner wall of the transition section 2.

[0053] The cofferdam structure proposed by the present invention, firstly, sets a transition section 2 between adjacent cofferdam sections 1. The existence of the transition section 2 provides a special connection area for the connection of adjacent cofferdam sections 1, making the splicing operation more convenient and efficient, and effectively solving the problem that the traditional cofferdam structure is difficult to splice. Secondly, the fixing bolts 3 are inserted from the inner wall of the transition section 2 from the inside to the outside along the thickness direction of the transition section 2, and are set at a first angle to the inner wall of the transition section 2, thereby enhancing the connection strength of the splicing, improving the ability of the splicing to resist external forces, and effectively reducing deformation, cracking and other problems caused by stress at the splicing, thereby enhancing the stability and safety of the entire cofferdam structure. In addition, the transition section 2 is set to meet the force requirements of the fixing bolts 3, ensuring the overall stability of the cofferdam section 1.

[0054] The specific structure of the cofferdam structure is explained below.

[0055] The cross-section of the accommodation space formed by the multiple cofferdam sections 1 can be rectangular, circular or irregular in shape, etc., which is not limited here and can be selected according to actual needs.

[0056] It is worth noting that it is necessary to ensure that the periphery of the accommodating space is sealed to prevent water from entering the accommodating space.

[0057] In this embodiment, an anti-corrosion structure is provided on the surface of the cofferdam section 1 to enhance its anti-corrosion ability in an underwater environment. In order to improve the overall strength of the cofferdam section 1, reinforcing ribs are provided inside the cofferdam section 1. The reinforcing ribs are made of high-strength I-beams and are evenly distributed inside the cofferdam section 1.

[0058] A transition section 2 is provided between two adjacent cofferdam sections 1. In this embodiment, double C2a channel steel is used for the transition section 2. The C2a channel steel has good mechanical properties, and its shape characteristics enable it to effectively disperse and transfer stress when subjected to pressure and tension from adjacent cofferdam sections 1, reduce stress concentration, and thus reduce the risk of deformation or damage of the transition section 2.

[0059] In other embodiments, the transition section 2 may also be made of materials such as profile steel and stainless steel, which is not limited here.

[0060] See also Figure 2 and Figure 3 In order to facilitate the connection between the cofferdam section 1 and the transition section 2, a clamping plate 21 is provided on the transition section 2, and a connecting plate 11 is formed on the cofferdam section 1. The clamping plate 21 is clamped on the connecting plate 11. The cooperation between the clamping plate 21 and the connecting plate 11 enhances the stability of the connection between the adjacent cofferdam sections 1 and the transition section 2. The clamping plate 21 can clamp the connecting plate 11, effectively limiting the displacement of the cofferdam section 1 in all directions, reducing the possibility of loosening or dislocation at the connection, thereby improving the integrity and stability of the entire cofferdam structure.

[0061] refer to Figure 4, a fixing bolt 3 is inserted into the transition section 2 to enhance its strength and stability, in order to improve the fixing effect of the fixing bolt 3. An anchor sleeve 22 is fixedly connected to the transition section 2, and the end of the fixing bolt 3 can be inserted into the anchor sleeve 22 and threadedly connected to the anchor sleeve 22. The anchor sleeve 22 provides a stable and precise connection position for the fixing bolt 3, ensuring the installation accuracy and consistency of the fixing bolt 3 on the transition section 2, thereby enhancing the reliability and stability of the connection of the fixing bolt 3. The anchor sleeve 22 helps to disperse the force borne by the fixing bolt 3, reduce the load of a single fixing bolt 3, extend its service life, and reduce the risk of connection failure due to loosening or damage of the fixing bolt 3. In addition, the anchor sleeve 22 also plays a certain protective role on the fixing bolt 3, reducing the direct erosion and damage of the fixing bolt 3 by the external environment.

[0062] In addition, a sleeve 23 is provided on the transition section 2, and the sleeve 23 extends along the insertion path of the fixing bolt 3, and at least part of the fixing bolt 3 can be inserted into the sleeve 23. On the one hand, the sleeve 23 provides additional protection and guidance for the fixing bolt 3. It can not only prevent the fixing bolt 3 from being hit and scratched by external objects during installation and use, but also ensure that the fixing bolt 3 maintains the correct position and angle during the insertion process, thereby improving the installation accuracy. On the other hand, the sleeve 23 can also prevent impurities such as water and dust from entering the gap between the fixing bolt 3 and the transition section 2 to a certain extent, reducing the corrosion and wear of the fixing bolt 3.

[0063] Regarding the setting position of the fixing bolt 3, the fixing bolt 3 is set at a first angle with the inner wall of the transition section 2, and the first angle is greater than or equal to 30 degrees and less than or equal to 60 degrees. Within this angle range, the fixing bolt 3 can better withstand forces from different directions. When the cofferdam structure is subjected to external forces such as water flow impact and soil pressure, the fixing bolt 3 can effectively disperse and transmit these forces to avoid stress concentration, thereby improving the overall strength and stability of the joint. The installation space will not be limited due to a too small angle, nor will the fixing effect be affected due to an excessively large angle. In this embodiment, the first angle is 45 degrees. In other embodiments, the first angle may also be 35 degrees, 40 degrees, 50 degrees, 55 degrees, etc., which are not limited here.

[0064] Since the fixing bolt 3 is inserted obliquely into the transition section 2 at a first angle, the end of the transition bolt is suspended in the air without support. Figure 5The inner wall of the transition section 2 is provided with a support structure 24, which is triangular in shape and is used to support the fixing bolts 3, providing strong support for the ends of the fixing bolts 3, ensuring that the fixing bolts 3 are in a stable position when subjected to force, without shaking or shifting, thereby enhancing the connection stability of the fixing bolts 3 and ensuring the reliability of the cofferdam structure joints. In addition, the triangular support structure 24 has excellent stability and structural strength due to its geometric characteristics, and can fully play a supporting role in the limited space of the transition section 2 without occupying too much space, and has little impact on the arrangement of other components, which helps to optimize the structural layout inside the transition section 2.

[0065] Regarding the number of fixing bolts 3, in this embodiment, two fixing bolts 3 are provided for each transition section 2, and the two fixing bolts 3 are cross-arranged at a second angle. The two cross-arranged fixing bolts 3 enhance the stability of the connection. By fixing adjacent cofferdam sections 1 from different directions and sharing the external force together, the movement and dislocation of the cofferdam sections 1 in all directions are effectively prevented, thereby improving the overall strength and stability of the joint. The cross-arranged fixing bolts 3 can work together and balance the force, thereby avoiding the risk of connection failure caused by excessive force on the fixing bolts 3 in a single direction.

[0066] It is understandable that the second angle needs to be adaptively adjusted according to the first angle between the fixing bolt 3 and the inner wall of the transition section 2, which is not limited here.

[0067] Specifically, of the two fixing bolts 3, the length of one fixing bolt 3 is greater than the length of the other fixing bolt 3. The longer fixing bolt 3 can penetrate deeper into the structure and connect with a more stable part, thereby enhancing the connection strength of the key part; the shorter fixing bolt 3 can provide auxiliary support and fixation at a shallower position, thereby jointly ensuring the stability of the transition section 2.

[0068] Embodiment 2

[0069] See also Figures 6 to 9 The embodiment of the present invention provides a waterproof bolt device, including a bolt body 4, a waterproof sleeve 5, a waterproof plug cap 6 and a fixing sleeve 7. The bolt body 4 is inserted into the waterproof sleeve 5; the waterproof plug cap 6 forms an opening along the axial direction of the waterproof sleeve 5, the waterproof plug cap 6 is inserted into the waterproof sleeve 5 and abuts against the inner wall of the waterproof sleeve 5, the bolt body 4 is inserted from the opening and is screwed to the waterproof plug cap 6; the fixing sleeve 7 can be inserted into the waterproof sleeve 5 and sleeved on the bolt body 4, and at least a part of the fixing sleeve 7 can extend into the opening and abut against the inner wall of the waterproof plug cap 6.

[0070] The waterproof bolt device proposed by the present invention effectively isolates the bolt body 4 from contact with external water by arranging a waterproof sleeve 5 outside the bolt body 4, thereby avoiding direct erosion of the bolt body 4 by the underwater environment from the root, and reducing the possibility of rust of the bolt body 4. The waterproof plug cap 6 forms an opening along the axial direction of the waterproof sleeve 5, and the bolt body 4 is inserted through the opening and screwed to the waterproof plug cap 6, which enhances the sealing of the bolt connection part and prevents moisture from penetrating from the connection gap. The fixed sleeve 7 can be inserted through the waterproof sleeve 5 and sleeved on the bolt body 4, and at least part of the fixed sleeve 7 can extend into the opening and abut against the inner wall of the waterproof plug cap 6, making the structure of the entire bolt device more stable, while further improving the waterproof performance, effectively preventing moisture from entering the inside of the bolt, delaying the rust process of the bolt, and extending the service life of the bolt.

[0071] Specifically, the waterproof plug cap 6 is made of plastic with good elastic deformation. The central part of the waterproof plug cap 6 is provided with an internal thread, which can be threadedly connected with the bolt body 4; the outer open end of the waterproof plug cap 6 relies on elasticity to abut against the inner wall of the waterproof sleeve 5.

[0072] More specifically, one side of the fixing sleeve 7 is welded and fixed to the end plate 8, and the two sides of the other side extend obliquely, and the inclination angle of the fixing sleeve 7 matches the opening angle of the waterproof plug cap 6. So that after the bolt body 4 is screwed to the fixing sleeve 7, at least part of the fixing sleeve 7 can extend into the opening and abut against the inner wall of the waterproof plug cap 6.

[0073] Embodiment 3

[0074] The embodiment of the present invention further provides a waterproof bolt device construction method, which is applied to the above-mentioned waterproof bolt device, and the specific steps are as follows:

[0075] Fix the fixed sleeve 7 on the end plate 8, and fill the fixed sleeve 7 with anti-rust grease;

[0076] The bolt body 4 is passed through and screwed to the waterproof plug cap 6;

[0077] The bolt body 4 and the waterproof plug cap 6 are inserted into the waterproof sleeve 5 so that the outer wall of the waterproof plug cap 6 abuts against the inner wall of the waterproof sleeve 5;

[0078] The fixing sleeve 7 is inserted into the waterproof sleeve 5 and sleeved with the bolt body 4, and a part of the fixing sleeve 7 is extended into the opening and abuts against the inner wall of the waterproof plug cap 6;

[0079] After the connection is completed, check the tightness between the waterproof plug cap 6 and the waterproof sleeve 5.

[0080] The anti-rust grease filled in the fixing sleeve 7 is squeezed out so that the anti-rust grease fills the gaps among the fixing sleeve 7, the waterproof sleeve 5 and the waterproof plug cap 6 to prevent water from entering and avoid rusting of the bolt body 4.

[0081] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A cofferdam structure, characterized in that: include: A plurality of cofferdam sections (1) are connected end to end in sequence and are arranged together to form a containing space; A transition section (2), wherein the transition section (2) is arranged between two adjacent cofferdam sections (1); A fixing bolt (3), wherein the fixing bolt (3) is inserted into the transition section (2) from the inner wall of the transition section (2) from the inside to the outside along the thickness direction of the transition section (2), and the fixing bolt (3) and the inner wall of the transition section (2) are arranged at a first angle.

2. The cofferdam structure according to claim 1, characterized in that: A clamping plate (21) is provided on the transition section (2), a connecting plate (11) is formed on the cofferdam section (1), and the clamping plate (21) is clamped on the connecting plate (11).

3. The cofferdam structure according to claim 1, characterized in that: The first angle is greater than or equal to 30 degrees and less than or equal to 60 degrees.

4. The cofferdam structure according to claim 1, characterized in that: An anchor sleeve (22) is fixedly connected to the transition section (2), and the end of the fixing bolt (3) can be inserted into the anchor sleeve (22) and threadedly connected to the anchor sleeve (22).

5. The cofferdam structure according to claim 1, characterized in that: The transition section (2) is provided with a sleeve (23), the sleeve (23) extending along the insertion path of the fixing bolt (3), and at least part of the fixing bolt (3) can be inserted into the sleeve (23).

6. The cofferdam structure according to claim 1, characterized in that: Corresponding to each of the transition sections (2), two fixing bolts (3) are provided, and the two fixing bolts (3) are cross-arranged at a second angle.

7. The cofferdam structure according to claim 6, characterized in that: Of the two fixing bolts (3), the length of one of the fixing bolts (3) is greater than the length of the other fixing bolt (3).

8. The cofferdam structure according to claim 1, characterized in that: The inner wall of the transition section (2) is provided with a support structure (24), the support structure (24) is triangular, and the support structure (24) is used to support the fixing bolt (3).

9. A waterproof bolt device, characterized in that: include: Bolt body (4); A waterproof sleeve (5), wherein the bolt body (4) is inserted into the waterproof sleeve (5); A waterproof plug cap (6) is formed with an opening along the axial direction of the waterproof sleeve (5); the waterproof plug cap (6) is passed through the waterproof sleeve (5) and abuts against the inner wall of the waterproof sleeve (5); the bolt body (4) is passed through the opening and is screwed to the waterproof plug cap (6); The fixing sleeve (7) can be inserted into the waterproof sleeve (5) and sleeved on the bolt body (4); at least a portion of the fixing sleeve (7) can extend into the opening and abut against the inner wall of the waterproof plug cap (6).

10. A waterproof bolt device construction method, characterized in that: The waterproof bolt device according to claim 9 comprises: The fixing sleeve (7) is fixed on the end plate (8), and anti-rust grease is filled into the fixing sleeve (7); The bolt body (4) is passed through and screwed to the waterproof plug cap (6); The bolt body (4) and the waterproof plug cap (6) are inserted into the waterproof sleeve (5) so that the outer wall of the waterproof plug cap (6) abuts against the inner wall of the waterproof sleeve (5); The fixing sleeve (7) is inserted into the waterproof sleeve (5) and sleeved with the bolt body (4), and a portion of the fixing sleeve (7) is extended into the opening and abuts against the inner wall of the waterproof plug cap (6); The anti-rust grease filled in the fixed sleeve (7) is squeezed out so that the anti-rust grease is filled in the gaps among the fixed sleeve (7), the waterproof sleeve (5) and the waterproof plug cap (6).

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