Assembly type buoyancy tank trestle and construction method thereof

Abstract

The invention discloses an assembly type buoyancy tank trestle and a construction method thereof.The assembly type buoyancy tank trestle comprises a plurality of single buoyancy tanks, the adjacent single buoyancy tanks are connected into a whole through universal connecting devices, and positioning piles connected through pile clamping devices are arranged on the two sides of the single buoyancy tanks; by arranging the universal connecting devices, the connecting strength between the single buoyancy tanks is improved, impact force caused by relative movement between the single buoyancy tanks can be effectively absorbed and dispersed when a vehicle passes through the trestle, and therefore the overall passing stability and comfort are improved, the whole trestle installation process is simple and rapid, the state on the water surface is stable and reliable, and the service life of the trestle is prolonged. The single buoyancy tanks are standardized and can be modularly spliced according to different length and direction requirements of the trestle, so that the construction risk is effectively reduced, the construction safety under various marine environment conditions is ensured, and the scene applicability and the structural design diversity of the buoyancy tank type trestle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pier design, and more specifically, to a modular pontoon pier and a construction method thereof. Background Art

[0002] When building bridges in deep sea areas, traditional construction methods usually rely on the construction of steel trestles. However, due to the large water depth in the sea area, the design of the steel pipe pile foundation needs to have a high load-bearing capacity, which directly leads to a significant increase in the construction cost of the trestles. In addition, the existing pontoon trestles often face problems such as loose connections and unstable vehicle traffic during actual use. These problems not only affect the safety of the pontoon trestles, but also reduce traffic efficiency, bringing additional challenges to construction. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0004] Another object of the present invention is to provide a modular pontoon trestle and a construction method thereof to solve the technical problem that the existing trestles used for bridge construction have low construction efficiency and affect the bridge operation efficiency.

[0005] In order to achieve these purposes and other advantages according to the present invention, on the one hand, the present invention provides a modular pontoon pier, including multiple single-body pontoons, each of which is provided with multiple built-in compartments to enable the single-body pontoons to float on the water surface, and adjacent single-body pontoons are connected as a whole by a universal connection device, and a pier passage surface is formed on the top surface of all single-body pontoons, and each single-body pontoon is provided with pile clamps on both sides of the connection direction, and positioning piles are vertically clamped and connected to the inner side of the pile clamps, and the upper end of the positioning pile is arranged higher than the top of the single-body pontoon, and the lower end is inserted downward and fixed in the underwater soil.

[0006] Preferably, the single pontoon is symmetrically connected with air bags on both sides of the extending direction of the pier, and the air bags float on the water surface.

[0007] Preferably, a pile shoe is provided at the bottom of the positioning pile to increase the contact area with the underwater soil.

[0008] Preferably, the connecting ends of two adjacent single buoyancy tanks are provided with mounting grooves opposite to each other, and the universal connection device comprises: A hydraulic telescopic mechanism is fixed in the installation groove and is arranged horizontally with its telescopic direction facing the adjacent single pontoon. An inner connecting joint is coaxially fixed on the telescopic end of the hydraulic telescopic mechanism. A universal joint connector, one of which is provided for each hydraulic telescopic mechanism, including an inner connecting shaft, a universal joint, and an outer connecting shaft arranged in sequence in the horizontal direction, one end of the inner connecting shaft is coaxially fixed with an outer connecting joint, and the other end is hinged to the universal joint, the outer connecting joint is connected to the inner connecting joint on the corresponding side by fixing connecting rings at the ends, aligning the connecting rings on both sides, and fixing them with bolts, and one end of the outer connecting shaft is hinged to the universal joint; A rotating shaft connector, which is connected between two opposite universal joint connectors, includes a rotating shaft and a sleeve that are matched together. The outer end of the rotating shaft is fixedly connected to the remaining end of the external connecting shaft on the corresponding side. The outer wall of the rotating shaft is evenly spaced in the circumferential direction and has multiple axially extending slide grooves. The outer wall of the rotating shaft is protruding with elastic connecting cards between the slide grooves. The inner wall of the sleeve is evenly spaced in the circumferential direction and has axially extending slide strips. A card hole is provided on the sleeve corresponding to the elastic connecting card. The outer diameter of the rotating shaft is matched with the inner diameter of the sleeve and each slide strip is slidably connected to a slide groove. When the sleeve is sleeved on the rotating shaft, the elastic connecting card enters the card hole to achieve connection and fixation.

[0009] Preferably, it also includes a corner pontoon, which has a right-angle structure and is provided with a plurality of built-in compartments inside. Both ends of the corner pontoon are respectively connected to a single pontoon through a universal connection device, and the pile clamps are respectively provided at the two right-angle sides on the outside of the corner pontoon.

[0010] Preferably, the two rows of the single-body pontoons are connected side by side, the pile clamps on the opposite sides of the two rows of the single-body pontoons are arranged as inner locators, the inner locators are staggered and covered with a layer of rubber pad on one side of the single-body pontoons facing the opposite side, grooves are arranged on both sides in the length direction of the single-body pontoons, guardrails are installed on the outer grooves of the side-by-side single-body pontoons, the top of the inner locator is arranged lower than the top of the groove, the opposite sides of the two side-by-side inner locators are respectively connected with a universal joint connector at the same height along the length direction of the single-body pontoons, the two universal joint connectors are connected by a rotating shaft connector, and a baffle is commonly covered and connected on the two grooves between the side-by-side single-body pontoons, and spherical blocks are respectively arranged on the tops of the two inner locators at positions directly below the bottom of the baffle.

[0011] On the other hand, the present invention also provides a construction method of a modular pontoon trestle, comprising the following steps: S1, float all the said single pontoons used for assembling the pier on the water surface at the construction location, arrange them along the assembling direction of the pier, and moor cross anchors to the four top corners of each said single pontoon to complete the plane positioning of the said single pontoon; S2, driving the hydraulic telescopic mechanism to push the inner connecting joint out of the corresponding installation groove, and connecting the two inner connecting joints between the adjacent single floating tanks by using the rotating shaft connector and the universal joint connector; S3, driving the hydraulic telescopic mechanism to retract the inner connecting joint to complete the plane position adjustment of the single pontoon; S4. The positioning piles are vertically clamped and connected in the pile clamps on both sides of each of the single pontoon boxes, and the bottoms of the positioning piles are inserted downward into the underwater soil to be fixed, thereby completing the installation of the required pier.

[0012] The present invention includes at least the following beneficial effects: the assembled pontoon pier of the present invention comprises a plurality of single pontoons, adjacent single pontoons are connected as a whole by a universal connection device, positioning piles connected by pile clamps are arranged on both sides of the single pontoons, and the connection strength between the single pontoons is improved by arranging the universal connection device. When vehicles pass on the pier, the impact force caused by the relative movement between the single pontoons can be effectively absorbed and dispersed, thereby improving the overall stability and comfort of passage. The installation process of the entire pier is simple and fast, and the state on the water surface is stable and reliable. The single pontoons are standardized settings and can be modularly spliced ​​according to the different lengths and directions of the pier. It not only effectively reduces the construction risk and ensures the construction safety under various marine environmental conditions, but also improves the scene applicability and structural design diversity of the pontoon-type pier.

[0013] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the structure of the single buoyancy box of the present invention connected by a universal connection device; Figure 2 It is a side view structural diagram of the single buoyancy box of the present invention connected by a universal connection device; Figure 3 It is a side structural diagram of the universal connection device of the present invention; Figure 4 It is a structural exploded view of the universal joint connector of the present invention; Figure 5 It is a structural exploded view of the rotary shaft connector of the present invention; Figure 6 A top view of a corner pontoon according to an embodiment of the present invention; Figure 7 This is a top view of the structure of the present invention when assembling double-row single-body pontoons; Figure markings in the specification: 1. cable, 2. single pontoon, 3. airbag, 4. pile clamp, 5. universal connection device, 6. guardrail, 7. positioning pile, 8. pile shoe, 9. internal positioner, 10. groove, 11. baffle, 12. corner pontoon, 51. internal connection joint, 52. connecting ring, 53. fixed structure, 54. rotating shaft connector, 55. universal joint connector, 56. external connection joint, 541. rotating shaft, 542. sleeve, 543. elastic connection card, 544. card hole, 545. slide groove, 546. slide bar, 551. internal connection shaft, 552. universal joint, 553. external connection shaft. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0016] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] like Figure 1-3 As shown, the present invention provides a modular pontoon pier, including multiple single pontoons 2, each of which is provided with multiple built-in compartments to allow the single pontoons 2 to float on the water surface, and adjacent single pontoons 2 are connected as a whole through a universal connection device 5, and a pier passage surface is formed on the top surfaces of all single pontoons 2, and each single pontoon 2 is provided with a pile clamp 4 on both sides of the connection direction, and a positioning pile 7 is vertically clamped and connected to the inner side of the pile clamp 4, and the upper end of the positioning pile 7 is arranged higher than the top of the single pontoon 2, and the lower end is inserted downward and fixed in the underwater soil.

[0018] The design of the single pontoon 2 has a number of built-in compartments and spaces so that the single pontoon 2 can float to a required height in the water. Guardrails 6 are correspondingly arranged on both sides of each single pontoon 2, and cover plates are laid in the gaps between adjacent single pontoons 2. The top surfaces of all the single pontoons 2 serve as passages, so that a pier structure is formed as a whole after the single pontoons 2 are spliced. When assembling the single pontoons 2, the single pontoons 2 are first floated in the water to the required position, and then positioned by mooring, and then the adjacent single pontoons 2 are integrated by a universal connection device 5, and then the single pontoons 2 are fixed in position in the horizontal plane by positioning piles 7, and the positioning piles 7 are connected by pile clamps 4 to fix the position of the single pontoon 2 in the vertical direction. The pile clamps 4 are generally arranged in the middle of the corresponding side of the single pontoon 2, and the pile clamps 4 can be welded and fixed as needed or be detachably fixed to the single pontoon 2. The assembled pontoon pier proposed in the present invention includes a plurality of single pontoons 2, and the adjacent single pontoons 2 are connected as a whole through a universal connection device 5. Positioning piles 7 connected through pile clamps 4 are arranged on both sides of the single pontoons 2. The connection strength between the single pontoons 2 is improved by arranging the universal connection device 5. When the vehicle passes on the pier, it can effectively absorb and disperse the impact force caused by the relative movement between the single pontoons 2, thereby improving the overall stability and comfort of the passage. The installation process of the entire pier is simple and fast, and the state on the water surface is stable and reliable. The single pontoons 2 are standardized settings and can be modularly spliced ​​according to the different lengths and directions of the pier. It not only effectively reduces the construction risk and ensures the construction safety under various marine environmental conditions, but also improves the scene applicability and structural design diversity of the pontoon pier.

[0019] In another technical solution, Figure 1-2 As shown, the single pontoon 2 is symmetrically connected with air bags 3 on both sides of the extending direction of the pier. The air bags 3 float on the water surface. The gas in the air bags 3 should not be filled to avoid being affected by waves.

[0020] In another technical solution, Figure 2 As shown, a pile shoe 8 is provided at the bottom of the positioning pile 7 to increase the contact area with the underwater soil and avoid stress concentration caused by insertion into the soil.

[0021] In another technical solution, Figure 1-5 As shown, the connecting ends of two adjacent single pontoons 2 are provided with mounting grooves, and the universal connection device 5 includes: A hydraulic telescopic mechanism is fixed in the installation groove and is arranged horizontally with the telescopic direction facing the adjacent single pontoon 2. An inner connecting joint 51 is coaxially fixed on the telescopic end of the hydraulic telescopic mechanism. A universal joint connector 55 is provided for each hydraulic telescopic mechanism, and includes an inner connecting shaft 551, a universal joint 552, and an outer connecting shaft 553 arranged in sequence in the horizontal direction. One end of the inner connecting shaft 551 is coaxially fixed with an outer connecting joint 56, and the other end is hinged to the universal joint 552. The outer connecting joint 56 is connected to the inner connecting joint 51 on the corresponding side by fixing connecting rings 52 at their ends, aligning the connecting rings 52 on both sides, and fixing them with bolts. One end of the outer connecting shaft 553 is hinged to the universal joint 552. The rotating shaft connector 54 is connected between two opposite universal joint connectors 55, and includes a rotating shaft 541 and a sleeve 542 that are arranged in a matching manner. The outer end of the rotating shaft 541 is fixedly connected to the remaining end of the outer connecting shaft 553 on the corresponding side. The outer wall of the rotating shaft 541 is evenly spaced in the circumferential direction and has a plurality of axially extending slide grooves 545. The rotating shaft 541 is provided with elastic connecting cards 543 protruding from the outer wall between the slide grooves 545. The inner wall of the sleeve 542 is evenly spaced in the circumferential direction and has axially extending slide bars 546. A card hole 544 is provided on the sleeve 542 corresponding to the elastic connecting card 543. The outer diameter of the rotating shaft 541 is matched with the inner diameter of the sleeve 542 and each slide bar 546 is slidably connected to a slide groove 545. When the sleeve 542 is sleeved on the rotating shaft 541, the elastic connecting card 543 enters the card hole 544 to achieve connection and fixation.

[0022] by Figure 3Taking the left and right direction as an example, between two adjacent single pontoons 2, the structural position relationship of the universal connection device 5 is from left to right: the hydraulic telescopic mechanism in the installation groove of the left single pontoon 2, the universal joint connector 55, the rotating shaft connector 54, the universal joint connector 55, the hydraulic telescopic mechanism in the installation groove of the right single pontoon 2, the rotating shaft connector 54, the universal joint connector 55 should be tested before installation to ensure their docking accuracy. For the convenience of explanation, for the relevant structure of a single single pontoon 2, the end close to the universal joint connector 55 is the outer side, and the end facing the single pontoon 2 itself is the inner side. The hydraulic telescopic mechanism is generally set as a hydraulic cylinder, and the hydraulic telescopic mechanism and the universal joint connector 55 are quickly installed and fixed through the bolt connection between the inner connecting joint 51 and the outer connecting joint 56. Of course, other connection methods can also be selected. The universal joint connector 55 itself has a universal joint 552, and the inner connecting shaft 551 and the outer connecting shaft 553 on both sides can move relative to each other in the circumferential direction. The rotating shaft 541 is connected to the outer connecting shaft 553 of the universal joint connector 55 on the left, and the sleeve 542 is connected to the outer connecting shaft 553 of the universal joint connector 55 on the right. The sleeve 542 is sleeved toward the rotating shaft 541, and each slide bar 546 is aligned with the slide groove 545. The rotating shaft 541 and the sleeve 542 slide towards each other. At this time, the elastic connecting card 543 does not hinder the relative movement of the rotating shaft 541 and the sleeve 542 under the action of elasticity. When the elastic connecting card 543 reaches the card hole 544, the elastic connecting card 543 pops out radially outward along the rotating shaft 541 to achieve the docking of the universal connection device 5, thereby completing the connection of adjacent single pontoons 2, which is easy and efficient to operate.

[0023] A fixing structure 53 is provided downwardly at the top of the outer end of the mounting groove to fix one end of the external connection joint 56 connected to the universal joint connector 55. The fixing structure 53 may be a section of a jacket matching the shape of the external connection joint 56. A rubber layer is provided on the bottom surface of the jacket to abut against the lateral top of the external connection joint 56 through the rubber layer to perform buffering and limiting fixation. A connecting plate may also be provided at a corresponding position on the outer side of the external connection joint 56. After the external connection joint 56 is retracted into place, the fixing structure 53 is used to bolt or bond it to the connecting plate.

[0024] In another technical solution, Figure 6 As shown, it also includes a corner pontoon 12, which is a right-angle structure, and a plurality of built-in compartments are arranged inside the corner pontoon. The two ends of the corner pontoon are respectively connected to a said single pontoon 2 through a said universal connection device 5, and the said pile clamps 4 are respectively arranged at the two right-angle sides outside the corner pontoon. After the corner pontoon is arranged, it can also be spliced ​​with the single pontoon 2 in the horizontal plane as a modular structure to change the direction of the pier and form a pier with different morphological structures.

[0025] In another technical solution, Figure 7As shown, it is formed by two rows of the single pontoons 2 connected side by side, the pile clamps on the opposite sides of the two rows of the single pontoons 2 are set as inner locators 9, the inner locators are staggered and covered with a layer of rubber pad on one side of the single pontoons facing the opposite side, grooves 10 are set on both sides of the length direction of the single pontoons 2, guardrails 6 are installed on the outer grooves of the side-by-side single pontoons 2, the top of the inner locator 9 is set lower than the top of the groove 10, the opposite sides of the two side-by-side inner locators 9 are respectively connected with a universal joint connector 55 at the same height along the length direction of the single pontoons 2, the two universal joint connectors 55 are connected by a rotating shaft connector 54, and a baffle 11 is commonly covered and connected on the two grooves 10 between the side-by-side single pontoons 2, and the bottom of the baffle 11 corresponds to the top of the two inner locators 9 directly below the position, respectively. Spherical blocks are set.

[0026] When constructing a double-row pontoon trestle, the following construction methods can be used, combined with Figure 1-3 , 7, specifically: A1. Two rows of monobloc pontoons 2 are close to each other and positioned. The rubber cushion layer is attached to the side monobloc pontoons in the row to absorb the wave collision force. The universal joint connector 55 and the rotating shaft connector 54 between the two inner positioners 9 are first used for connection, which is equivalent to having two universal joint connectors 55 and one rotating shaft connector 54 between the two inner positioners 9. The operation method is the same as the above technical solution. The positioning pile 7 can be set in the inner positioner 9 as needed. At this time, the top of the positioning pile 7 does not exceed the setting of the inner positioner; A2, then connect the two pairs of monofloating tanks 2 in the front and rear of the pier extension direction by using a universal connection device 5; A3. Guardrails 6 are set in the grooves outside the two rows of single pontoons 2, and positioning piles 7 are constructed in the outer pile clamps 4, inserted into the soil and fixed and clamped and connected with the pile clamps 4. A baffle 11 is set between the two grooves 10 inside the two rows of single pontoons 2. Both sides of the baffle 11 can be set with rubber edging. The baffle 11 is in contact with the inner positioner 9 through a spherical block, thereby realizing a trestle structure with a larger width range. A large construction platform composed of multiple single pontoons can be set according to the same method as needed.

[0027] The present invention also provides a construction method for a modular pontoon trestle, Figure 1-5 As shown, the following steps are included: S1. Select a time when the wave window is small to dock the single pontoons 2, float all the single pontoons 2 used to assemble the pier on the water surface at the construction location, arrange them along the pier assembly direction, and moor cross anchors at the four top corners of each single pontoon 2 to complete the plane positioning of the single pontoon 2. Figure 1As shown, each single pontoon 2 is connected to four cables 1 for mooring, and the corner cables 1 of adjacent single pontoons 2 are in cross directions to improve stability during plane positioning.

[0028] S2, drive the hydraulic telescopic mechanism to push the inner connection joint 51 out of the corresponding installation groove, and use the rotating shaft connector 54 and the universal joint connector 55 to connect the two inner connection joints 51 between the adjacent single floating tanks 2. After the rotating shaft connector 54 is rotated and adjusted in direction, it is sleeved in the axial direction until the elastic connection card 543 enters the card hole 544 at the corresponding design position, completing the connection of the two adjacent universal joint connectors 55. Under the spherical direction adaptability of the universal joint connector 55, the relative movement of the single floating tank 2 is offset.

[0029] S3. Drive the hydraulic telescopic mechanism to retract the inner connecting joint 51, complete the plane position adjustment of the single floating box 2, return the inner connecting joint 51 and the outer connecting joint 56 to the installation groove, shorten the gap between the single floating boxes 2 and the length of the exposed universal connecting device 5, and control the relative movement space and range between the single floating boxes 2.

[0030] S4, vertically clamp and connect the positioning piles 7 in the pile clamps 4 on both sides of each of the single floating boxes 2, insert the bottom of the positioning piles 7 downward into the underwater soil and fix them, and complete the installation of the required pier. First, insert the positioning piles 7 into the inner space of the pile clamps 4 according to the position of the single floating box 2 in the horizontal plane, and fix them vertically with the underwater soil, then adjust and determine the height position of the single floating box 2 on the water surface, connect and fix them with the positioning piles 7 through the pile clamps 4, and when removing, first contact the connection between the pile clamps 4 and the positioning piles 7, then remove the positioning piles 7, and finally move the single floating box 2.

[0031] In another technical solution, Figure 6 As shown, for the annular pier design or the U-shaped pier design, the end of a row of the single pontoons is connected to a right-angle end of the corner pontoon 12 through the universal connection device.

[0032] The modular pontoon pier proposed in the present invention improves the connection strength between the individual pontoons and the stability of vehicle traffic through a universal connection device, ensuring construction safety under various marine environmental conditions. The design of the present invention significantly simplifies the construction process of the pier, fully considers all aspects of the construction, thereby effectively shortening the construction period. At the same time, thanks to the modular design of the pontoons, the construction risks are also effectively reduced, and the construction units can operate in a safer environment. In addition, due to the reduced dependence on heavy equipment and the use of steel, the present invention also shows obvious advantages in reducing production costs, and has broad application prospects and important market value.

[0033] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A modular pontoon pier, characterized in that: It includes multiple single pontoons, each of which is provided with multiple built-in compartments to make the single pontoons float on the water surface. Adjacent single pontoons are connected as a whole through a universal connection device, and a pier passage surface is formed on the top surface of all single pontoons. Each single pontoon is provided with pile clamps on both sides of the connection direction, and positioning piles are vertically clamped and connected on the inner side of the pile clamps. The upper end of the positioning pile is higher than the top of the single pontoon, and the lower end is inserted downward and fixed in the underwater soil.

2. The assembled pontoon pier according to claim 1, characterized in that: The single pontoon is symmetrically hung with air bags on both sides of the extending direction of the pier, and the air bags float on the water surface.

3. The modular pontoon pier according to claim 1, characterized in that: A pile shoe is provided at the bottom of the positioning pile to increase the contact area with the underwater soil.

4. The modular pontoon pier according to claim 1, characterized in that: The connecting ends of two adjacent single buoyancy tanks are provided with mounting grooves opposite to each other, and the universal connection device comprises: A hydraulic telescopic mechanism is fixed in the installation groove and is arranged horizontally with its telescopic direction facing the adjacent single pontoon. An inner connecting joint is coaxially fixed on the telescopic end of the hydraulic telescopic mechanism. A universal joint connector, one of which is provided for each hydraulic telescopic mechanism, including an inner connecting shaft, a universal joint, and an outer connecting shaft arranged in sequence in the horizontal direction, one end of the inner connecting shaft is coaxially fixed with an outer connecting joint, and the other end is hinged to the universal joint, the outer connecting joint is connected to the inner connecting joint on the corresponding side by fixing connecting rings at the ends, aligning the connecting rings on both sides, and fixing them with bolts, and one end of the outer connecting shaft is hinged to the universal joint; A rotating shaft connector, which is connected between two opposite universal joint connectors, includes a rotating shaft and a sleeve that are matched together. The outer end of the rotating shaft is fixedly connected to the remaining end of the external connecting shaft on the corresponding side. The outer wall of the rotating shaft is evenly spaced in the circumferential direction and has multiple axially extending slide grooves. The outer wall of the rotating shaft is protruding with elastic connecting cards between the slide grooves. The inner wall of the sleeve is evenly spaced in the circumferential direction and has axially extending slide strips. A card hole is provided on the sleeve corresponding to the elastic connecting card. The outer diameter of the rotating shaft is matched with the inner diameter of the sleeve and each slide strip is slidably connected to a slide groove. When the sleeve is sleeved on the rotating shaft, the elastic connecting card enters the card hole to achieve connection and fixation.

5. The modular pontoon pier according to claim 1, characterized in that: It also includes a corner pontoon, which has a right-angle structure and is provided with a plurality of built-in compartments inside. Both ends of the corner pontoon are respectively connected to a single pontoon through a universal connection device, and the pile clamps are respectively provided at the two right-angle sides outside the corner pontoon.

6. The modular pontoon pier according to claim 4, characterized in that: It is formed by two rows of single-body pontoons connected side by side, the pile clamps on the opposite sides of the two rows of single-body pontoons are set as inner locators, the inner locators are staggered and covered with a layer of rubber pad on one side of the single-body pontoons facing the opposite side, grooves are set on both sides of the length direction of the single-body pontoons, guardrails are installed on the outer grooves of the side-by-side single-body pontoons, the top of the inner locator is set lower than the top of the groove, the opposite sides of the two side-by-side inner locators are respectively connected with a universal joint connector at the same height along the length direction of the single-body pontoons, the two universal joint connectors are connected by a rotating shaft connector, and a baffle is commonly covered and connected on the two grooves between the side-by-side single-body pontoons, and the bottom of the baffle corresponds to the tops of the two inner locators directly below which are respectively provided with spherical blocks.

7. The construction method of the assembled pontoon pier as claimed in claim 4, characterized in that: The steps include: S1, float all the said single pontoons used for assembling the pier on the water surface at the construction location, arrange them along the assembling direction of the pier, and moor cross anchors to the four top corners of each said single pontoon to complete the plane positioning of the said single pontoon; S2, driving the hydraulic telescopic mechanism to push the inner connecting joint out of the corresponding installation groove, and connecting the two inner connecting joints between the adjacent single floating tanks by using the rotating shaft connector and the universal joint connector; S3, driving the hydraulic telescopic mechanism to retract the inner connecting joint to complete the plane position adjustment of the single pontoon; S4. The positioning piles are vertically clamped and connected in the pile clamps on both sides of each of the single pontoon boxes, and the bottoms of the positioning piles are inserted downward into the underwater soil to be fixed, thereby completing the installation of the required pier.

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