Drainage ditch connecting device suitable for pile foundation wharf expansion joint and preparation method thereof

Abstract

The application introduces a drainage ditch connecting device suitable for the expansion joint of a pile foundation wharf and a preparation method thereof, wherein the drainage ditch connecting device comprises an upper layer steel drainage ditch, a lower layer steel drainage ditch and a rubber sealing plate, the rubber sealing plate is arranged between the upper layer steel drainage ditch and the lower layer steel drainage ditch; the lower layer steel drainage ditch is fixedly arranged in the drainage ditch on the left side of the expansion joint of the wharf through pre-burial and closely abuts against the expansion joint; bolt holes are arranged on the upper layer steel drainage ditch, the lower layer steel drainage ditch and the intermediate rubber sealing plate, for placing bolts, and the length of the bolt hole on the upper layer steel drainage ditch is much greater than the diameter of the bolt. Through the above design, the drainage ditches on both sides of the wharf section are connected, and the through connection of the drainage system is realized; and when uneven settlement or differential displacement occurs in the structure on both sides of the wharf section, the upper layer steel drainage ditch can move in the lower layer drainage ditch to overcome the displacement caused by the settlement.

Description

Technical Field

[0001] This invention relates to the field of wharf drainage, and more specifically to a drainage ditch connection device and its preparation method suitable for expansion joints of pile-foundation wharves. Background Technology

[0002] Uneven settlement or differential displacement of the wharf structure can cause significant damage to the overall structure. In practice, to prevent uneven settlement or differential displacement, wharves are often divided into sections during design and construction, with expansion joints typically 20mm to 30mm wide between each section.

[0003] During wharf construction, in addition to considering the impact of uneven settlement and differential displacement, daily drainage issues also need to be addressed. There are generally two approaches to this problem. The first approach is to forgo open drainage ditches at expansion joints and instead install a drainage system in each section. For example, Chinese Patent CN209603048U discloses a rear-mounted drainage structure for a bulk cargo wharf. This structure includes a wharf deck with a one-way slope. A front rail and a rear rail are installed on the wharf deck, parallel to each other. The front rail is located at the higher end of the one-way slope, and the rear rail at the lower end. The front rail is embedded under the wharf deck, and the rear rail is installed on the wharf deck at the same height as the front rail embedded under the wharf deck. A collection ditch is located on the one-way slope near the rear rail. A large-diameter drainage pipe is embedded under the wharf deck along the length of the rear rail. A drainage ditch is also located on the wharf deck along the length of the rear rail. The drainage ditch and the collection ditch are located on opposite sides of the rear rail and are connected to each other via the drainage pipe. Its advantage is that the drainage ditch does not pass through the settlement joint, so the settlement joint does not need special treatment; the disadvantage is that because there is no open ditch to collect water in this section, some water will accumulate. In addition, if there are too many independent drainage systems, it will make it difficult to collect and merge rainwater and sewage.

[0004] Another method involves using drainage ditches to connect the entire structure, with settlement joints sealed using asphalt-impregnated concrete, as an example of a high-pile wharf drainage ditch structure disclosed in Chinese Patent CN212956355U. This structure includes a wharf deck and a cast-in-place panel. Two symmetrical longitudinal beams are installed below the cast-in-place panel, forming the two side walls of the drainage ditch. A drainage ditch base plate is installed between the two symmetrical longitudinal beams at the bottom. Drainage pipes are pre-embedded in the middle of the crossbeams, connecting the drainage ditches on both sides of the crossbeams. Its advantages include drainage ditches arranged along the entire length of the wharf deck, resulting in relatively good water collection. It also allows for the division of drainage areas as needed, facilitating the collection of rainwater and sewage. However, if uneven settlement occurs, the expansion joint filler may fall off, leading to leakage. Ultimately, rainwater and sewage will flow into the waterway through the expansion joints, affecting collection efficiency and polluting the aquatic environment.

[0005] In existing dock drainage facilities, if a drainage system is set up in each section, water will inevitably accumulate at the expansion joints because there are no drainage ditches. However, if the drainage is achieved by connecting the drainage ditches to drain the entire structure, leakage problems caused by uneven settlement cannot be avoided. Therefore, there is an urgent need to design a new dock drainage structure and its construction method to achieve a continuous drainage ditch, comprehensively collect rainwater and sewage from the dock surface, and avoid leakage problems. Summary of the Invention

[0006] Existing wharf drainage methods cannot simultaneously achieve interconnected drainage ditches to comprehensively collect rainwater and sewage from the wharf surface while avoiding leakage risks caused by uneven settlement and other external environmental factors. To address this issue, this application designs a drainage ditch connection device and its fabrication method suitable for expansion joints in pile-foundation wharves, aiming to achieve interconnected drainage ditches, comprehensively collect rainwater and sewage from the wharf surface, and prevent leakage problems.

[0007] A drainage ditch connection device suitable for expansion joints of pile foundation wharves includes an upper steel drainage ditch, a lower steel drainage ditch, and a rubber sealing plate, wherein the upper steel drainage ditch is installed on the lower steel drainage ditch.

[0008] The rubber sealing plate is installed between the upper steel drainage ditch and the lower steel drainage ditch;

[0009] The upper steel drainage ditch, the lower steel drainage ditch, and the rubber sealing plate are fixedly connected by bolts.

[0010] The lower steel drainage ditch is pre-embedded in the drainage ditch on the left side of the wharf expansion joint and is close to the expansion joint.

[0011] Preferably, 2 / 5 of the length of the upper steel drainage ditch is located on the left side of the wharf expansion joint.

[0012] Preferably, bolt holes are provided in the upper steel drainage ditch, the lower steel drainage ditch, and the rubber sealing plate, and the length of the bolt holes in the upper steel drainage ditch is much larger than the bolt diameter.

[0013] Preferably, the bolt is pre-embedded in the drainage ditch below the bolt hole of the lower steel drainage ditch, and the lower steel drainage ditch is fixed relative to the bolt.

[0014] Preferably, the width of the lower steel drainage ditch is the same as the width of the drainage ditch on the left side of the wharf expansion joint.

[0015] Preferably, the width of the rubber sealing plate is the same as the length of the overlapping part of the upper and lower steel drainage ditches, and it is installed along the bottom and side surfaces of the upper and lower steel open ditches. The thickness of the rubber sealing plate is 5-10mm.

[0016] Preferably, the width of the upper steel drainage ditch is 22-40 mm smaller than the width of the lower steel drainage ditch.

[0017] Preferably, the upper steel drainage ditch, the lower steel drainage ditch, and the bolt (5) are all made of stainless steel 316L.

[0018] Preferably, the steel plates of both the upper and lower steel drainage ditches are 6-10 mm thick.

[0019] A method for preparing a drainage ditch connection device suitable for expansion joints of pile foundation wharves includes the following steps:

[0020] Step S1: Pre-embed four bolts on the left side of the expansion joint of the dock, two at the bottom of the drainage ditch, and one on each of the two sides;

[0021] Step S2: Fix the lower steel drainage ditch to the bolts and pour concrete to stabilize it with the drainage ditch on the left side of the wharf expansion joint;

[0022] Step S3: Place a rubber sealing plate on the lower steel drainage ditch and fix it to 4 bolts;

[0023] Step S4: Place the upper steel drainage ditch inside the rubber sealing plate and pour it to stabilize it with the drainage ditch on the right side of the dock expansion joint; then tighten it with bolts.

[0024] The beneficial effects obtained by this invention are as follows:

[0025] 1. This application designs a drainage ditch connection device suitable for expansion joints of pile foundation wharves. By pre-embedding the lower steel drainage ditch in the drainage ditch on the left side of the wharf expansion joint, and then setting a rubber sealing plate and an upper steel drainage ditch, the drainage ditches on the wharf sections can be connected, thereby realizing the connection of the drainage system.

[0026] 2. The drainage ditch connection device designed in this application is suitable for the expansion joint of the pile foundation wharf. When the drainage ditch structure on both sides of the wharf expansion joint experiences uneven settlement or asynchronous displacement, the upper steel drainage ditch can automatically expand and contract according to the settlement or displacement of the hydraulic structure on both sides, thereby ensuring the safe connection and sealing between adjacent drainage ditches, avoiding leakage and water pollution. At the same time, the drainage ditch connection device also has the technical effect of not causing external force influence on the differential settlement of the hydraulic structure.

[0027] 3. This application designs a drainage ditch connection device suitable for expansion joints of pile foundation wharves. The drainage ditch connection device is composed of an upper steel drainage ditch, a lower steel drainage ditch, and a rubber sealing plate. The drainage ditch connection device is placed between the wharf sections. This can not only meet the requirements of the continuous layout of the wharf drainage ditch, enabling rapid collection of rainwater and sewage from the wharf, and reducing the adverse effects of too many drainage zones on the later collection of rainwater and sewage, but also overcome the problem of the wharf expansion joint filling material falling off due to differential settlement or asynchronous displacement of the hydraulic structures on both sides.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0029] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0031] Figure 1 This is a process plan view of the drainage ditch connection device provided in this application;

[0032] Figure 2 This is a process cross-sectional view of the drainage ditch connection device provided in this application;

[0033] Figure 3This is a diagram showing the state of the drainage ditch connection device when the hydraulic structures on both sides move towards each other due to differential displacement.

[0034] Figure 4 This is a diagram showing the state of the drainage ditch connection device when the hydraulic structures on both sides move in opposite directions due to differential displacement.

[0035] Figure 5 This is a diagram showing the state of the drainage ditch connection device when uneven settlement occurs in a hydraulic structure.

[0036] Attached reference numerals: 1. Lower steel drainage ditch; 2. Upper steel drainage ditch; 3. Rubber sealing plate; 4. Dock expansion joint; 5. Bolt. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0038] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0039] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0040] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0041] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0042] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0043] Example 1

[0044] This embodiment mainly introduces a drainage ditch connection device suitable for expansion joints of pile foundation wharves. Please refer to [reference needed]. Figure 1-2 , Figure 1 This is a process plan view of the drainage ditch connection device provided in this application; Figure 2 This is a process cross-sectional view of the drainage ditch connection device provided in this application; specifically, it includes an upper steel drainage ditch 2, a lower steel drainage ditch 1, and a rubber sealing plate 3, characterized in that:

[0045] The upper steel drainage ditch 2 is installed on the lower steel drainage ditch 1;

[0046] The rubber sealing plate 3 is installed between the upper steel drainage ditch 2 and the lower steel drainage ditch 1;

[0047] The upper steel drainage ditch 2, the lower steel drainage ditch 1, and the rubber sealing plate 3 are fixedly connected by bolts 5.

[0048] The lower steel drainage ditch 1 is pre-embedded in the drainage ditch on the left side of the wharf expansion joint 4 and is closely attached to the wharf expansion joint 4.

[0049] Furthermore, 2 / 5 of the length of the upper steel drainage ditch 2 is located to the left of the wharf expansion joint 4.

[0050] Furthermore, bolt holes are provided on the upper steel drainage ditch 2, the lower steel drainage ditch 1, and the rubber sealing plate 3. The length of the bolt hole on the upper steel drainage ditch 2 is much larger than the diameter of the bolt 5.

[0051] Furthermore, the bolt 5 is pre-embedded in the drainage ditch below the bolt hole of the lower steel drainage ditch 1, and the lower steel drainage ditch 1 is fixedly installed relative to the bolt 5.

[0052] Furthermore, the width of the lower steel drainage ditch 1 is the same as the width of the drainage ditch on the left side of the wharf expansion joint 4.

[0053] Furthermore, the width of the rubber sealing plate 3 is the same as the inner width of the lower steel drainage ditch 1.

[0054] Furthermore, the width of the upper steel drainage ditch 2 is 20-32 mm smaller than the width of the lower steel drainage ditch 1.

[0055] Furthermore, both the upper steel drainage ditch 2 and the lower steel drainage ditch 1 are made of 316L stainless steel.

[0056] Furthermore, the steel plates of the upper steel drainage ditch 2 and the lower steel drainage ditch 1 are both 6-20mm thick.

[0057] This application designs a drainage ditch connection device suitable for expansion joints of pile foundation wharves. By pre-embedding a lower steel drainage ditch in the drainage ditch on the left side of the wharf expansion joint, and then installing a rubber sealing plate and an upper steel drainage ditch, the drainage ditches on the wharf sections can be connected after the above installation is completed, thereby realizing the connection of the drainage system.

[0058] This application designs a drainage ditch connection device suitable for expansion joints of pile foundation wharves. When uneven settlement or asynchronous displacement occurs in the hydraulic structures on both sides of the wharf expansion joint, the upper steel drainage ditch can automatically expand and contract according to the settlement or displacement of the hydraulic structures on both sides, thereby ensuring the safe connection and sealing of the drainage ditch and avoiding leakage and water pollution. At the same time, the drainage ditch connection device also has the technical effect of not causing external force influence on the differential settlement of the hydraulic structures.

[0059] Example 2

[0060] Based on the above embodiment 1, this embodiment mainly introduces an optimized design of a drainage ditch connection device suitable for expansion joints of pile foundation wharves, specifically including an upper steel drainage ditch 2, a lower steel drainage ditch 1 and a rubber sealing plate 3, wherein the upper steel drainage ditch 2 is set on the lower steel drainage ditch 1;

[0061] The rubber sealing plate 3 is installed between the upper steel drainage ditch 2 and the lower steel drainage ditch 1;

[0062] The upper steel drainage ditch 2, the lower steel drainage ditch 1, and the rubber sealing plate 3 are fixedly connected by bolts 5.

[0063] The lower steel drainage ditch 1 is pre-embedded in the drainage ditch on the left side of the wharf expansion joint 4 and is closely attached to the wharf expansion joint 4.

[0064] Furthermore, to withstand the corrosive environment near water and sea, the upper and lower steel drainage ditches are made of 316L stainless steel, with a steel plate thickness of 8mm.

[0065] Furthermore, the lower steel drainage ditch 1 is pre-embedded in the hydraulic structure drainage ditch on one side. The size of the lower steel drainage ditch is the same as the width of the drainage ditch on the left side of the wharf expansion joint 4. The length of the lower steel drainage ditch is 300mm, that is, the 300mm long lower steel drainage ditch 1 is completely located on the left side of the expansion joint.

[0066] Furthermore, the upper steel drainage ditch 2 is also made of stainless steel 316L, with a steel plate thickness of 8mm and an inner width of (B-26)mm, where B is the width of the drainage ditch.

[0067] Furthermore, the upper steel drainage ditch is 500mm long, of which 300mm is at the right edge of the expansion joint, and the remaining 200mm is covered by a sealing rubber plate.

[0068] Furthermore, at a location 50mm from the left edge of the expansion joint, two sets of bolt structures are pre-embedded on the dock surface, and the lower steel drainage ditch 1 and rubber sealing plate 3 are installed at this location. Bolt mounting holes are provided, and bolts are secured through these holes.

[0069] Furthermore, additional features are provided on the side walls of the lower steel drainage ditch 1 and the rubber sealing plate 3. Bolt mounting holes, with the installation height 100mm from the plane of the drainage ditch.

[0070] Furthermore, the upper steel drainage ditch has bolt holes at the positions of the precast bolts, with two bolt holes at the bottom and corresponding bolt holes on the side walls.

[0071] Furthermore, the bolt holes on the upper steel drainage ditch are completely different in size from those on the lower steel drainage ditch. The bolt holes on the upper steel drainage ditch are 20mm wide and 90mm long mounting holes. When the bolt passes through this bolt hole, the upper steel drainage ditch can still slide laterally relative to the bolt.

[0072] Furthermore, the bolts used in this embodiment are made of stainless steel S316L, model M10, four bolts in total. Two bolts are pre-embedded in the dock surface under the lower steel drainage ditch, and the other two are used for side fixing of the upper steel drainage ditch 2, the lower steel drainage ditch 1 and the rubber sealing plate 3.

[0073] Furthermore, the rubber sealing plate is 5mm thick and is placed between the upper and lower steel drainage ditches. When the nut is tightened, it can seal the gap between the upper and lower drainage ditches.

[0074] This application designs a drainage ditch connection device suitable for expansion joints of pile foundation wharves. The drainage ditch connection device is composed of an upper steel drainage ditch, a lower steel drainage ditch, and a rubber sealing plate. The drainage ditch connection device is placed between the wharf sections. This can satisfy the through layout of the wharf drainage ditch, achieve rapid collection of wharf rainwater and sewage, reduce the adverse effects of too many drainage zones on the later collection of rainwater and sewage, and overcome the drawbacks of leakage and pollution of the aquatic environment caused by the detachment of open ditch filling material due to differential settlement or asynchronous displacement of the hydraulic structures on both sides.

[0075] Example 3

[0076] Based on the above embodiments 1-2, this embodiment mainly introduces a method for preparing a drainage ditch connection device suitable for expansion joints of pile foundation wharves, and its state under different environments.

[0077] Its preparation method includes the following steps:

[0078] Step S1: Pre-embed bolts 5 on the left side of the expansion joint 4 at the dock;

[0079] Step S2: Fix the lower steel drainage ditch 1 to the bolt 5 and pour it to stabilize it with the drainage ditch on the left side of the wharf expansion joint 4.

[0080] Step S3: Place the rubber sealing plate 3 on the lower steel drainage ditch 1 and fix it to the bolt 5;

[0081] Step S4: Place the upper steel drainage ditch 2 inside the rubber sealing plate 3 and pour it to stabilize it with the drainage ditch on the right side of the wharf expansion joint 4; then tighten it with bolts 5.

[0082] Please refer to Figure 3 , Figure 3 This indicates that the hydraulic structures on both sides are experiencing differential displacement and are being squeezed in opposite directions, with the upper steel drainage ditch shifting a maximum of 30mm to the other side. According to the "Design Code for Wharf Structures" (JTS167-2018), the maximum expansion joint of a wharf is generally 20mm to 30mm. Therefore, the maximum inward squeezing movement is 30mm. This invention meets the usage requirements, and under this scenario, the invention will not be damaged or leak.

[0083] Please refer to Figure 4 , Figure 4 This indicates that the hydraulic structures on both sides have undergone differential displacement, moving in opposite directions to both sides. The maximum displacement of this drainage ditch connection device to both sides can reach 50mm, which is greater than the 30mm required by the standard. Under this scenario, the invention will not be damaged or leaked.

[0084] Please refer to Figure 5 , Figure 5This indicates that the hydraulic structure on one side has settled, while the elevation of the hydraulic structure on the other side remains unchanged. The connecting device is stretched to one side, with a maximum stretch of 50mm. Taking the most unfavorable expansion joint of 30mm as the horizontal distance and the maximum stretch of 50mm as the hypotenuse, we can obtain the acceptable limit settlement of 40mm under normal use, which is much greater than the settlement required by the specifications. Therefore, this invention will not be damaged or leaked under uneven settlement scenarios.

[0085] The above description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations to these embodiments within the spirit and principles of the present invention, achieved through conventional substitutions or by achieving the same function without departing from the principles and spirit of the present invention, fall within the scope of protection of the present invention.

Claims

1. A drainage ditch connection device suitable for expansion joints of pile foundation wharves, comprising an upper steel drainage ditch (2), a lower steel drainage ditch (1), and a rubber sealing plate (3), characterized in that: The upper steel drainage ditch (2) is set on the lower steel drainage ditch (1), and the width of the upper steel drainage ditch (2) is 22~40mm smaller than the width of the lower steel drainage ditch (1). The rubber sealing plate (3) is set between the upper steel drainage ditch (2) and the lower steel drainage ditch (1), and its length is the same as the length of the overlapping part of the upper and lower steel drainage ditches. It is installed along the bottom and side surfaces of the upper and lower steel open ditches. The upper steel drainage ditch (2), the lower steel drainage ditch (1), and the rubber sealing plate (3) are fixedly connected by bolts (5); The lower steel drainage ditch (1) is pre-embedded in the drainage ditch on the left side of the wharf expansion joint (4) and is close to the wharf expansion joint (4). Bolt holes are provided on the upper steel drainage ditch (2), the lower steel drainage ditch (1), and the rubber sealing plate (3). The length of the bolt hole on the upper steel drainage ditch (2) is much larger than the diameter of the bolt (5). After the bolt passes through this bolt hole, the upper steel drainage ditch can still slide laterally relative to the bolt.

2. The drainage ditch connection device for expansion joints of pile foundation wharves according to claim 1, characterized in that, Two-fifths of the length of the upper steel drainage ditch (2) is located to the left of the wharf expansion joint (4).

3. The drainage ditch connection device for expansion joints of pile foundation wharves according to claim 1, characterized in that, The bolt (5) is embedded in the drainage ditch below the bolt hole of the lower steel drainage ditch (1), and the lower steel drainage ditch (1) is fixed relative to the bolt (5).

4. The drainage ditch connection device for expansion joints of pile foundation wharves according to any one of claims 1 or 2, characterized in that, The width of the lower steel drainage ditch (1) is the same as the width of the drainage ditch on the left side of the wharf expansion joint (4).

5. The drainage ditch connection device for expansion joints of pile foundation wharves according to any one of claims 1 or 2, characterized in that, The thickness of the rubber sealing plate (3) is 5~10mm.

6. The drainage ditch connection device for expansion joints of pile foundation wharves according to any one of claims 1 or 2, characterized in that, The upper steel drainage ditch (2), the lower steel drainage ditch (1), and the bolts (5) are all made of stainless steel 316L.

7. The drainage ditch connection device for expansion joints of pile foundation wharves according to any one of claims 1 or 2, characterized in that, The steel plates of the upper steel drainage ditch (2) and the lower steel drainage ditch (1) are both 6-10 mm thick.

8. The construction method of the drainage ditch connection device applicable to the expansion joint of a pile foundation wharf according to any one of claims 1 to 7, characterized in that, Includes the following steps: Step S1: Pre-embed four bolts (5) on the left side of the expansion joint (4) at the dock, two at the bottom of the drainage ditch, and one on each of the two sides; Step S2: Fix the lower steel drainage ditch (1) to 4 bolts (5) and stabilize it with the drainage ditch on the left side of the wharf expansion joint (4); Step S3: Place a rubber sealing plate (3) on the lower steel drainage ditch (1) and fix it to the bolt (5); Step S4: Place the upper steel drainage ditch (2) inside the rubber sealing plate (3) and pour it to stabilize it with the drainage ditch on the right side of the wharf expansion joint (4); then tighten it with bolts (5).

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