Semi-underwater concrete abutment structure and construction method thereof

Abstract

The invention relates to a semi-underwater concrete abutment structure and a construction method thereof, and belongs to the technical field of wharf construction. The semi-underwater concrete abutment structure comprises a steel pipe pile, a base, a connecting piece and a concrete layer. The lower ends of the steel pipe piles are inserted into an underwater soil layer of a to-be-constructed area, and the upper ends of the steel pipe piles are arranged upwards; the base is provided with a reserved hole allowing the steel pipe pile to be inserted therein. The connecting piece is arranged at the preformed hole and used for connecting the base and the steel pipe pile; the concrete layer is poured on the base and covers the tops of the connecting pieces and the steel pipe piles. According to the semi-underwater concrete abutment structure, the base is prefabricated firstly, the prefabricated base is connected with the steel pipe piles, then concrete is poured on the base layer by layer, the semi-underwater concrete abutment structure is formed, the overall strength of the semi-underwater concrete abutment structure is high, the construction difficulty and the operation time in the overwater complex environment are reduced, the construction cost is low, and the construction efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of wharf construction technology, and in particular relates to a semi-underwater concrete pier structure and its construction method. Background Technology

[0002] In recent years, with the rapid development of the port and shipping industry, the demand for open-type wharves has been increasing. Among the various support structures for open-type wharves, high-pile pier structures have been widely used in related engineering fields due to their excellent wave adaptability and ability to cope well with the complex hydrological environment of open sea areas, thus becoming an important structural form in the construction of open-type wharves.

[0003] In the construction of high-pile pier structures, the pouring of the pier body is a crucial step. Traditional construction techniques typically involve bottom-supported formwork pouring, with the formwork system usually fixed by suspension using threaded steel bars. Anti-buoyancy bars are also required to balance the wave buoyancy forces acting on the formwork. However, when facing large-scale pier projects in deep water, the buoyancy forces on the formwork system increase, making the steel formwork prone to deformation. This leads to increased difficulty in water-stopping during pier construction and compromises construction quality. Furthermore, this construction method involves multiple complex procedures such as formwork suspension and anti-buoyancy bar installation, resulting in a cumbersome and inefficient process. The extensive use of anti-buoyancy bars also increases construction costs.

[0004] To overcome the shortcomings of traditional techniques, the construction method of using steel caissons as bottom and side forms for pier and abutment casting has been gradually promoted. However, this technique still requires the fabrication of large bottomed steel caissons, resulting in high initial investment costs. Furthermore, the installation, sinking, and dismantling operations in open sea areas are difficult and carry high construction risks, and it still cannot adequately meet the construction requirements of high-pile pier and abutment structures. Summary of the Invention

[0005] To address the shortcomings of related technologies, this invention provides a semi-underwater concrete pier structure and its construction method. By first prefabricating the base and connecting the prefabricated base to the steel pipe pile, concrete is then poured layer by layer on the base to form the semi-underwater concrete pier structure. This not only results in high overall strength of the semi-underwater concrete pier structure, but also reduces the construction difficulty and operation time in complex water environments, and achieves low construction cost and high construction efficiency.

[0006] This invention provides a semi-underwater concrete pier structure, comprising: Steel pipe piles are installed with their lower ends inserted into the underwater soil layer of the area to be constructed, and their upper ends facing upwards. The base has pre-drilled holes for inserting steel pipe piles; A connector, located at a pre-drilled hole, is used to connect the base to the steel pipe pile; A concrete layer is poured on the base and covers the top of the connectors and steel pipe piles.

[0007] In the technical solution, the lower end of the steel pipe pile is inserted into the underwater soil layer of the construction area to provide a stable bottom support for the entire pier structure. Pre-drilled holes are set on the base, through which the steel pipe pile passes, and connectors connect the base and the steel pipe pile at these holes, achieving a secure connection. A concrete layer is poured onto the base and covers the connectors and the top of the steel pipe piles. This provides good protection for the connectors and the top of the steel pipe piles, preventing corrosion and extending the structural service life. Furthermore, it allows the base, connectors, the top of the steel pipe piles, and the concrete layer to form an organic whole, enhancing the load-bearing capacity and overall integrity of the entire pier structure.

[0008] In some embodiments of this application, the base is provided with a groove with an upper opening, a reserved hole is opened at the bottom of the groove, and the concrete layer is located in the groove.

[0009] In this technical solution, by setting a groove in the base and placing the concrete within it, the connection strength between the base and the concrete layer is increased. The groove also provides enclosure space for the concrete pouring, eliminating the need for additional temporary enclosure structures and simplifying the construction process. Furthermore, pre-drilled holes at the bottom of the groove allow the steel pipe piles to pass through and connect with the base. The bottom of the groove evenly distributes the load transferred from the concrete layer and the superstructure to the steel pipe piles, preventing localized stress concentration.

[0010] In some embodiments of this application, a reinforcing beam is provided at the bottom of the groove, the reinforcing beam protrudes upward from the bottom of the groove, a pre-drilled hole extends through the reinforcing beam along its opening direction, and a connector is connected to the reinforcing beam.

[0011] In this technical solution, a reinforcing beam is installed at the bottom of the groove, allowing the pre-drilled hole to pass through it, thereby enhancing the structural strength and rigidity of the area surrounding the pre-drilled hole. Since the pre-drilled hole is the connection point between the base and the steel pipe pile, and also a major area of ​​stress concentration, the reinforcing beam prevents the base from cracking due to excessive local stress. Simultaneously, the reinforcing beam increases the axial height of the pre-drilled hole, thereby increasing the mating dimensions between the steel pipe pile and the base, and ultimately increasing the connection strength between them.

[0012] In some embodiments of this application, there is a fitting gap between the outer wall of the steel pipe pile and the inner wall of the reserved hole, and the fitting gap is filled with concrete.

[0013] In this technical solution, a fitting gap exists between the outer wall of the steel pipe pile and the inner wall of the pre-drilled hole to facilitate the insertion of the steel pipe pile into the hole. By pouring and filling concrete into the fitting gap, the steel pipe pile and the base form an integral structure, preventing loosening or relative swaying. This not only enhances the overall integrity and strength of the connection but also effectively transfers loads and reduces losses during load transfer. Furthermore, the filling concrete seals the gap between the steel pipe pile and the pre-drilled hole, preventing moisture, soil impurities, and other contaminants from entering and corroding the steel pipe pile or connectors, thus extending the structure's service life and improving its durability.

[0014] In some embodiments of this application, the base includes multiple prefabricated modules, each prefabricated module having at least one reserved hole, and adjacent prefabricated modules having splicing seams, with joint concrete poured into the splicing seams to connect the multiple prefabricated modules into one unit.

[0015] In the technical solution, the base is designed to be assembled from multiple prefabricated modules. Each prefabricated module has at least one reserved hole to mate with a corresponding steel pipe pile, allowing each prefabricated module to be prefabricated independently, effectively improving the production efficiency of the base. Furthermore, each prefabricated module can be transported independently, reducing the overall transportation and hoisting difficulty of the base. The splicing joints between adjacent prefabricated modules are connected into a unified structure by pouring joint concrete. This not only accommodates the installation adjustment needs caused by positioning deviations of the steel pipe piles or terrain differences during on-site construction, but also ensures the integrity and sealing of the connected prefabricated modules.

[0016] In addition, the present invention also provides a construction method for a semi-underwater concrete pier structure, used to construct the aforementioned semi-underwater concrete pier structure; the construction method includes the following steps: Multiple steel pipe piles are inserted into the underwater soil layer of the area to be constructed, with a preset interval between each steel pipe pile, and the lower end of each steel pipe pile is inserted into the soil layer to a preset depth. Prefabricated base; after the base is prefabricated, support components are installed in the area around the pre-drilled holes on the base. By using hoisting support components, the base is hoisted to the construction position, and the posture of the base is adjusted so that the reserved hole is aligned with the corresponding steel pipe pile. Insert the steel pipe pile into the corresponding reserved hole and connect the top of the steel pipe pile to the support to achieve temporary fixation between the base and the steel pipe pile; Install the connector on the base and connect the connector to the steel pipe pile; Pour concrete into the joint between the outer wall of the steel pipe pile and the inner wall of the reserved hole, and remove the support components after the concrete filling is completed. Concrete layers are poured vertically onto the base to form concrete layers, thus completing the construction of the semi-underwater concrete pier structure.

[0017] In this technical solution, multiple steel pipe piles are first inserted into the water in the construction area and fixed to a predetermined depth in the soil, providing a stable foundation for the subsequent installation of the base and the entire pier structure. Support components are installed on the base to provide lifting points, facilitating the lifting of the base by hoisting equipment. These components connect to the steel pipe piles when they are inserted into pre-drilled holes, temporarily fixing the base to the steel pipe piles. Connectors are then installed on the base to further connect the base and the steel pipe piles. Concrete is poured into the gap between the steel pipe piles and the pre-drilled holes to ensure a firm connection between the base and the steel pipe piles. After removing the support components, concrete layers are poured layer by layer. This not only allows for the recycling of the support components but also ensures the quality of the concrete pouring and the structural strength. This construction method reduces the difficulty and time of construction in complex aquatic environments, and lowers the amount of formwork and on-site support requirements.

[0018] In some embodiments of this application, concrete is poured layer by layer in the groove of the base and no additional formwork is required during pouring; the maximum thickness of the concrete layer does not exceed the depth of the groove.

[0019] In the technical solution, the concrete layers are poured one by one in the groove, and the groove wall is used to contain the concrete, eliminating the need for formwork, reducing the construction steps of formwork erection and dismantling, and lowering construction costs and time.

[0020] In some embodiments of this application, during the base prefabrication process, a first embedded steel plate and a second embedded steel plate are pre-embedded in the outer periphery area of ​​the reserved hole, the support is connected to the first embedded steel plate, and the connector is connected to the second embedded steel plate.

[0021] In the technical solution, during the prefabrication of the base, a first embedded steel plate and a second embedded steel plate are pre-embedded in the area around the reserved hole to facilitate the connection between the base and the support and connecting parts during construction.

[0022] In some embodiments of this application, the support includes a longitudinal beam and a transverse beam, with the transverse beam connected to one end of the longitudinal beam. When installing the support, the end of the longitudinal beam away from the transverse beam is connected to a first pre-embedded steel plate, so that the transverse beam is located above the reserved hole and spans the reserved hole, so that when the steel pipe pile is inserted into the reserved hole, the top of the steel pipe pile abuts against the transverse beam.

[0023] In the technical solution, the support adopts a combination structure of longitudinal beams and transverse beams. The transverse beam is connected to one end of the longitudinal beam and is located above the reserved hole and spans the reserved hole, so that when the steel pipe pile is inserted into the reserved hole, its top can abut against the transverse beam, thereby realizing the temporary fixation between the base and the steel pipe pile.

[0024] In some embodiments of this application, a leveling bolt is provided between the support member and the top of the steel pipe pile. The leveling bolt is used to adjust the levelness of the base. After the base is adjusted to a preset level state by turning the leveling bolt, concrete is poured to fill the gap between the outer wall of the steel pipe pile and the inner wall of the reserved hole.

[0025] In the technical solution, leveling bolts are installed between the support and the top of the steel pipe pile. The leveling bolts are turned to adjust the levelness of the base. After the base is adjusted to the preset level state, concrete is poured to fill the gap between the outer wall of the steel pipe pile and the inner wall of the reserved hole. This is to avoid uneven pouring of subsequent concrete layers or structural stress imbalance caused by the tilt of the base, thereby improving the installation accuracy of the pier structure.

[0026] In some embodiments of this application, the base is prefabricated in sections. The base includes multiple prefabricated modules, each of which has at least one reserved hole to connect the prefabricated module to the corresponding steel pipe pile. After each prefabricated module is temporarily fixed to the corresponding steel pipe pile, there is a splicing joint between adjacent prefabricated modules. After pouring joint concrete into the splicing joint to connect multiple prefabricated modules into one piece, concrete is poured layer by layer on the base.

[0027] In this technical solution, the base is prefabricated in modules. Each prefabricated module has at least one pre-drilled hole to mate with a corresponding steel pipe pile, ensuring the accuracy and stability of the connection between a single module and the steel pipe pile. After each prefabricated module is temporarily fixed to its corresponding steel pipe pile, the joints between adjacent modules are first filled with joint concrete to connect multiple modules into a whole. Then, concrete is poured layer by layer on the base. This ensures the integrity and sealing of the connected prefabricated modules, preventing relative displacement between modules during subsequent concrete layer pouring, and improving the structural strength and stability of the entire base and even the pier structure.

[0028] Based on the above technical solution, the semi-underwater concrete pier structure and its construction method in this embodiment of the invention first prefabricate the base, connect the prefabricated base with the steel pipe pile, and then pour concrete layer by layer on the base to form the semi-underwater concrete pier structure. This not only results in high overall strength of the semi-underwater concrete pier structure, but also reduces the construction difficulty and operation time in complex water environments, resulting in low construction cost and high construction efficiency. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a structure in one embodiment of the semi-underwater concrete pier structure of the present invention; Figure 2This is a schematic diagram of the interconnection of the base, connector, and steel pipe pile in one embodiment of the semi-underwater concrete pier structure of the present invention. Figure 3 for Figure 2 Sectional view at point AA; Figure 4 This is a schematic diagram of a semi-underwater concrete pier structure according to one embodiment of the present invention, showing the connectors installed on the reinforcing beam. Figure 5 This is a schematic diagram of the structure of the base installation connector in one embodiment of the semi-underwater concrete pier structure of the present invention; Figure 6 for Figure 5 Sectional view at point BB; Figure 7 for Figure 5 Sectional view at CC; Figure 8 This is a schematic diagram of the structure of the support member and the steel pipe pile in one embodiment of the semi-underwater concrete pier structure of the present invention; Figure 9 This is a schematic diagram of the structure of the semi-underwater concrete pier structure of the present invention when the base is equipped with a connecting member; Figure 10 for Figure 9 Enlarged view of a portion of point A in the middle; Figure 11 This is a schematic diagram of the base structure in one embodiment of the semi-underwater concrete pier structure of the present invention; Figure 12 A flowchart of an embodiment of the construction method for a semi-underwater concrete pier structure.

[0030] In the diagram, 1. Base; 2. Concrete layer; 3. Steel pipe pile; 4. Connector; 5. Support; 6. Leveling bolt; 11. Side plate; 12. Bottom plate; 13. Reinforcing beam; 14. Second embedded steel plate; 15. First embedded steel plate; 101. Reserved hole; 102. Groove; 103. Joint; 104. Prefabricated module; 31. Fill with concrete; 301. Joint; 41. Radial plate; 42. Connecting plate; 51. Longitudinal beam; 52. Cross beam; 53. Rib plate. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] As attached Figure 1 As shown in the schematic embodiment of the semi-underwater concrete pier structure and its construction method of the present invention, the semi-underwater concrete pier structure includes a steel pipe pile 3, a base 1, a connector 4, and a concrete layer 2; the lower end of the steel pipe pile 3 is inserted into the underwater soil layer of the area to be constructed, and the upper end of the steel pipe pile 3 is set upward; the base 1 is provided with a reserved hole 101 for inserting the steel pipe pile 3; the connector 4 is provided at the reserved hole 101 for connecting the base 1 and the steel pipe pile 3; the concrete layer 2 is poured on the base 1 and covers the top of the connector 4 and the steel pipe pile 3.

[0036] like Figure 2 and Figure 3As shown, the base 1 includes a base plate 12 and a side plate 11. The base plate 12 has a pre-drilled hole 101, through which the steel pipe pile 3 passes vertically. The lower end of the side plate 11 is connected to the base plate 12 and located at the outer edge of the base plate 12. The side plate 11 and the base plate 12 together define a groove 102 with an upper opening. The side plate 11 forms the groove wall of the groove 102, and the base plate 12 forms the bottom of the groove 102. The concrete layer 2 is located in the groove 102, which not only increases the connection strength between the base 1 and the concrete layer 2, but also provides a retaining space in the groove 102 when the concrete layer 2 is poured, so that no additional temporary retaining structure is needed when the concrete layer 2 is poured, simplifying the construction process of the concrete layer 2.

[0037] The reserved hole 101 is set on the base plate 12 so that the steel pipe pile 3 passes through the base plate 12 to achieve a mating connection with the base 1. The base plate 12 can evenly distribute the load transferred from the concrete layer 2 and the superstructure to the steel pipe pile 3, avoiding local stress concentration.

[0038] like Figure 2 and Figure 3 As shown, a reinforcing beam 13 is provided on the base plate 12. The reinforcing beam 13 protrudes upward from the upper surface of the base plate 12. A pre-drilled hole 101 is provided through the reinforcing beam 13 along its opening direction. A connector 4 is connected to the reinforcing beam 13.

[0039] It should be noted that, since the area where the reserved hole 101 is located is the connection point between the base 1 and the steel pipe pile 3, and is also the main area of ​​stress concentration, the setting of the reinforcing beam 13 can increase the strength of this area and prevent the base 1 from cracking due to excessive local stress. At the same time, the reinforcing beam 13 increases the axial height of the reserved hole 101 and increases the mating dimensions between the steel pipe pile 3 and the base 1, thereby increasing the connection strength between the steel pipe pile 3 and the base 1.

[0040] like Figure 4 As shown, multiple connectors 4 are provided on the outer periphery of the same reserved hole 101. The multiple connectors 4 are arranged in the circumferential direction and are connected to the same steel pipe pile 3 to increase the connection between the base 1 and the steel pipe pile 3.

[0041] In some embodiments, such as Figure 4 As shown, a second embedded steel plate 14 is provided in the area around the reserved hole 101. The second embedded steel plate 14 is provided on the reinforcing beam 13, and the connector 4 is connected to the second embedded steel plate 14.

[0042] The connector 4 is preferably made of metal. The connector 4 is welded to the second embedded steel plate 14 to ensure the connection between the connector 4 and the base 1. The connector 4 is also welded to the steel pipe pile 3 to increase the welding effect between the connector 4 and the steel pipe pile 3.

[0043] like Figure 4As shown, the connector 4 includes a radial plate 41 and a connecting plate 42. The radial plate 41 is arranged radially along the reserved hole 101, and the connecting plate 42 is arc-shaped and arranged circumferentially along the reserved hole 101. The connecting plate 42 is connected to the radial plate 41. Preferably, there are two radial plates 41, which are respectively arranged at both ends of the connecting plate 42. The lower ends of the radial plate 41 and the connecting plate 42 are connected to the second embedded steel plate 14, and the end of the radial plate 41 facing the reserved hole 101 is welded to the steel pipe pile 3.

[0044] In some embodiments, the radial plate 41 is calculated to have a height of 250mm, a top length of 620mm, a bottom length of 680mm, and a thickness of 25mm based on the construction conditions and the stress state of the base 1; the connecting plate 42 has a height of 250mm, a width of 100mm, and a thickness of 25mm.

[0045] Typically, the outer diameter of the steel pipe pile 3 is smaller than the inner diameter of the reserved hole 101 to facilitate the insertion of the steel pipe pile 3 into the reserved hole 101. However, this also results in a fitting gap 301 between the outer wall of the steel pipe pile 3 and the inner wall of the reserved hole 101 when the steel pipe pile 3 is inserted into the reserved hole 101. In this invention, by pouring and filling concrete 31 into the fitting gap 301, not only can the fitting gap 301 be filled, making the steel pipe pile 3 and the base 1 form an integral structure, but it can also prevent the steel pipe pile 3 and the base 1 from becoming loose or relatively wobbly, thereby enhancing the firmness of the connection between the steel pipe pile 3 and the base 1.

[0046] It should be noted that in some applications, the steel pipe pile 3 is inserted into the water, the top of the semi-submersible concrete pier structure is above the water surface, and the bottom of the semi-submersible concrete pier structure is below the water surface. The water will come into contact with the base 1. The filling concrete 31 can also seal the mating gap 301 between the steel pipe pile 3 and the reserved hole 101, preventing moisture, soil impurities, etc. from entering the mating gap 301 and corroding the steel pipe pile 3 or the connector 4, thus extending the service life of the pier structure and improving its durability.

[0047] Based on the above-mentioned semi-underwater concrete pier structure, the present invention also provides a construction method for a semi-underwater concrete pier structure, the construction method comprising the following steps: S1. Insert multiple steel pipe piles 3 into the underwater soil layer of the area to be constructed, with a preset interval between each steel pipe pile 3, and insert the lower end of the steel pipe pile 3 into the soil layer to a preset depth. S2. Prefabricated base 1. After the base 1 is prefabricated, support member 5 is installed in the area around the pre-drilled hole 101 on the base 1. S3. Using the hoisting support 5, hoist the base 1 to the construction position, adjust the posture of the base 1 so that the reserved hole 101 is aligned with the corresponding steel pipe pile 3; S4. Insert the steel pipe pile 3 into the corresponding reserved hole 101, and connect the top of the steel pipe pile 3 to the support 5 to achieve temporary fixation between the base 1 and the steel pipe pile 3; S5. Install connector 4 on base 1 and connect connector 4 to steel pipe pile 3; S6. Pour filling concrete 31 into the joint 301 between the outer wall of the steel pipe pile 3 and the inner wall of the reserved hole 101, and remove the support 5 after the filling concrete 31 is poured. S7. Concrete is poured layer by layer along the vertical direction on the base 1 to form concrete layer 2, so as to complete the construction of the semi-underwater concrete pier structure.

[0048] like Figures 5-8 As shown, the support member 5 is located at the reserved hole 101 and installed on the reinforcing beam 13. When the steel pipe pile 3 is not inserted into the reserved hole 101, the support member 5 provides a lifting point for the base 1, facilitating the lifting equipment to lift the base 1. When the lifting equipment lifts the support member 5, the support member 5 bears the entire load of the base 1 through the reinforcing beam 13. The support member 5 simplifies and facilitates the transformation of the force system during the lifting and installation of the base 1, improves construction efficiency, and reduces construction risks.

[0049] After the steel pipe pile 3 passes through the reserved hole 101 and is connected to the support member 5, the entire load of the base 1 is transferred to the steel pipe pile 3 through the support member 5. The base 1 is temporarily fixed to the steel pipe pile 3 through the support member 5, providing a foundation for the subsequent connection between the base 1 and the steel pipe pile 3.

[0050] In some embodiments, such as Figure 7 As shown, during the prefabrication of the base 1, a first embedded steel plate 15 is pre-embedded in the outer periphery of the reserved hole 101. The first embedded steel plate 15 is set on the reinforcing beam 13 to facilitate the installation of the support component 5.

[0051] The support member 5 is preferably made of metal and is welded to the first embedded steel plate 15 to ensure the firmness of the connection between the support member 5 and the base 1, and to prevent the support member 5 from loosening or falling off during hoisting and temporary fixing.

[0052] like Figure 7 and Figure 8 As shown, the support member 5 includes a longitudinal beam 51 and a transverse beam 52, with the transverse beam 52 connected to one end of the longitudinal beam 51. When installing the support member 5, the end of the longitudinal beam 51 away from the transverse beam 52 is connected to the first embedded steel plate 15, so that the transverse beam 52 is located above the reserved hole 101 and spans the reserved hole 101, so that when the steel pipe pile 3 is inserted into the reserved hole 101, the top of the steel pipe pile 3 abuts against the transverse beam 52.

[0053] It should be noted that since the crossbeam 52 is located directly above the reserved hole 101, after the steel pipe pile 3 is inserted into the reserved hole 101, the top of the steel pipe pile 3 will come into contact with the crossbeam 52. Under the action of the crossbeam 52, the steel pipe pile 3 cannot continue to be inserted into the reserved hole 101.

[0054] In some embodiments, each support member 5 includes two longitudinal beams 51 and one transverse beam 52. The two longitudinal beams 51 are arranged along the diameter direction of the reserved hole 101, and the length direction of the transverse beam 52 is parallel to the direction of the side plate 11. The two ends of the transverse beam 52 in the length direction are connected to the two longitudinal beams 51 respectively.

[0055] In other embodiments, a lifting lug is provided at the top of the crossbeam 52 to facilitate hoisting by hoisting equipment, and the position of the lifting lug is aligned with the longitudinal beam 51 in the vertical direction.

[0056] In some embodiments, the longitudinal beam 51 is a steel section, and the transverse beam 52 is a steel section. The type of steel section is obtained according to the construction conditions and the stress state of the base 1, and the height of the longitudinal beam 51 is 1000mm, the distance between the two longitudinal beams 51 is 1900mm, and the length of the transverse beam 52 is 2700mm.

[0057] like Figure 8 As shown, the support member 5 also includes a rib plate 53, which is connected to the longitudinal beam 51 and the transverse beam 52 to increase the connection strength between the longitudinal beam 51 and the transverse beam 52. The rib plate 53 is provided on the side of the longitudinal beam 51 away from the reserved hole 101 and at the bottom of the transverse beam 52 to avoid the rib plate 53 interfering with the insertion of the steel pipe pile 3 into the reserved hole 101.

[0058] In some embodiments, the rib 53 has a height of 300 mm, a width of 150 mm, and a thickness of 20 mm.

[0059] In the above-mentioned construction method for semi-underwater concrete pier structure, the support member 5 not only provides a lifting point for the base 1, facilitating the lifting equipment to lift the base 1, but also connects with the steel pipe pile 3 when the steel pipe pile 3 is inserted into the reserved hole 101, realizing temporary fixation between the base 1 and the steel pipe pile 3, providing a foundation for further connection between the base 1 and the steel pipe pile 3; and after the steel pipe pile 3 is permanently fixed between the base 1 and the steel pipe pile 3, the support member 5 is removed from the base 1, realizing the recycling of the support member 5, which not only saves resources, but also ensures the pouring quality and structural strength of the concrete layer 2.

[0060] It should be noted that when the bottom of the semi-underwater concrete pier structure is below the water surface and the top is above the water surface, the side plate 11 and the bottom plate 12 can prevent water from entering the base 1, making it convenient to pour and form the concrete layer 2 inside the base 1.

[0061] Since the posture of the base 1 will change during hoisting, the level of the base 1 cannot be guaranteed. The tilting of the base 1 will cause the concrete poured on the base 1 layer by layer to tilt. Therefore, a leveling bolt 6 is provided between the top of the crossbeam 52 and the steel pipe pile 3. Tightening the leveling bolt 6 can adjust the level of the base 1.

[0062] In some embodiments, the leveling bolt 6 can not only adjust the levelness of the base 1, but also connect the crossbeam 52 and the steel pipe pile 3 to achieve the connection between the top of the steel pipe pile 3 and the support member 5.

[0063] It should be noted that there are usually multiple leveling bolts 6. Tightening the leveling bolts 6 can adjust the height of the base 1, thereby adjusting the levelness of the base 1. The leveling bolts 6 are conventional technology in this field and will not be described in detail here.

[0064] In some embodiments, the leveling bolt 6 is installed at the connection between the crossbeam 52 and the steel pipe pile 3, and the diameter of the leveling bolt 6 is 20mm.

[0065] like Figure 9 and Figure 10 As shown, after adjusting the base 1 to the preset horizontal state by tightening the leveling bolt 6, the connector 4 is installed on the reinforcing beam 13. The connector 4 is used to further connect the steel pipe pile 3 and the base 1, increasing the firmness of the connection between the steel pipe pile 3 and the base 1.

[0066] After the connector 4 and the support 5 are connected to the steel pipe pile 3 respectively, the connection between the base 1 and the steel pipe pile 3 is relatively firm. The connector 4 is set in the circumference of the steel pipe pile 3, and the support 5 is set in the top of the steel pipe pile 3, which can prevent the steel pipe pile 3 from shaking relative to the base 1.

[0067] Because there is a fitting gap 301 between the outer wall of the steel pipe pile 3 and the inner wall of the reserved hole 101, the base 1 and the steel pipe pile 3 are prone to shaking. Moreover, when the water level below the pier structure is high, water will come into contact with the base 1, and the moisture entering the gap will corrode the steel pipe pile 3 or the connector 4. Therefore, in this invention, after the connector 4 connects the steel pipe pile 3 and the base 1, filling concrete 31 is poured into the gap between the steel pipe pile 3 and the reserved hole 101. By filling the gap with filling concrete 31, not only can a firm connection between the base 1 and the steel pipe pile 3 be achieved, but the gap can also be sealed to prevent moisture, soil impurities, etc. from entering the gap and corroding the steel pipe pile 3 or the connector 4, thereby extending the service life of the semi-underwater concrete pier structure and improving its durability.

[0068] After the support member 5 and the connector 4 are connected to the steel pipe pile 3, the filling concrete 31 is poured into the mating gap 301 between the steel pipe pile 3 and the base 1, which can ensure the pouring quality of the filling concrete 31.

[0069] After adjusting the base 1 to the preset horizontal state using the leveling bolts 6, the connector 4 is then installed and the filling concrete 31 is poured into the mating gap 301. This can prevent uneven pouring of the subsequent concrete layer 2 or structural stress imbalance caused by the tilt of the base 1, and improve the installation accuracy of the semi-underwater concrete pier structure.

[0070] Since the filling concrete 31 can also increase the connection between the base 1 and the steel pipe pile 3, the connection 4, the support 5 and the filling concrete 31 are all used to increase the connection between the base 1 and the steel pipe pile 3, which can easily lead to resource waste. Therefore, in this invention, after the filling concrete 31 is poured, the support 5 is disassembled, and the filling concrete 31 and the connection 4 are used to firmly connect the base 1 and the steel pipe pile 3, so as to realize the recycling of the support 5 and reduce construction costs.

[0071] It should be noted that when pouring concrete layer by layer on the base 1, it is necessary to tie reinforcing bars on the base 1 so that the concrete encases the reinforcing bars, thereby increasing the strength of the concrete layer 2; the reinforcing bars are preferably tied to the side plate 11. This is common knowledge in the field and will not be elaborated further.

[0072] In step S7, concrete is poured layer by layer in the groove 102. The groove 102 plays a good role in limiting the pouring range of concrete, which can control the pouring boundary and shape of concrete layer 2, avoid the flow and diffusion of concrete during the pouring process, and ensure the forming quality of concrete layer 2. Moreover, no additional formwork is required when pouring concrete, which effectively reduces the construction process of formwork erection and dismantling, and reduces construction costs and time.

[0073] It should be noted that the maximum thickness of concrete layer 2 shall not exceed the depth of groove 102.

[0074] like Figure 11 As shown, the base 1 adopts a modular prefabrication method, that is, the base 1 includes multiple prefabricated modules 104, each of which can be prefabricated individually to improve the production efficiency of the base 1; each prefabricated module 104 is equipped with a support 5 so that each prefabricated module 104 can be transported individually, thereby reducing the overall transportation and hoisting difficulty of the base 1; each prefabricated module 104 has at least one reserved hole 101 so that each prefabricated module 104 can be connected to the corresponding steel pipe pile 3 individually, in order to adapt to the installation adjustment needs caused by the positioning deviation of the steel pipe pile 3 or the terrain difference during on-site construction.

[0075] In some embodiments, each prefabricated module 104 is provided with two reserved holes 101 so that one prefabricated module 104 can be connected to two corresponding steel pipe piles 3, thereby increasing the robustness of the prefabricated module 104.

[0076] After each precast module 104 is connected to its corresponding steel pipe pile 3, there is a splicing joint 103 between adjacent precast modules 104. By pouring joint concrete into the splicing joint 103, multiple precast modules 104 are connected into an integral structure. The pouring of the joint concrete can be done after the pouring of the filling concrete 31 or before the pouring of the filling concrete 31, and the pouring time of the two is not necessarily related.

[0077] It should be noted that during construction, the joint concrete must first be poured into the splice joint 103 before pouring concrete layer by layer on the base 1.

[0078] In some embodiments, each prefabricated module 104 is preferably connected to a steel pipe pile 3 by four leveling bolts 6. The four leveling bolts 6 are arranged in a quadrilateral shape.

[0079] During the prefabrication process, the first embedded steel plate 15 and the second embedded steel plate 14 need to be embedded in the reinforcing beam 13 respectively to facilitate the connection between the base 1 and the support member 5 and the connector 4.

[0080] It should also be noted that when pouring the filling concrete 31 and the joint concrete, a template needs to be set at the bottom of the base 1 so that the module can seal the corresponding gaps, thereby realizing the pouring of concrete. The templates are removed after the filling concrete 31 and the joint concrete are poured. This is the prior art in this field and will not be described in detail here.

[0081] The base 1 adopts a modular prefabrication method, which not only reduces the prefabrication difficulty of the base 1, but also allows for the independent hoisting of each prefabricated module 104, which can effectively adapt to the space constraints of different construction sites, making it easier to transport, hoist and adjust the posture of individual prefabricated modules 104, thus improving the flexibility and efficiency of construction.

[0082] The base 1 is a precast reinforced concrete structure and can be assembled in sections. The side plate 11 is a precast reinforced concrete structure and can be assembled in sections. The bottom plate 12 is a precast reinforced concrete structure and can be assembled in sections.

[0083] In some embodiments, the height of the base 1 is 1750mm, the width of the base 1 is 13000mm, and the segment length of the base 1 can be set according to the lifting capacity of the lifting equipment. Based on the construction conditions and the stress state of the base 1, the height of the side plate 11 is 1750mm, the thickness of the side plate 11 is 300mm, the width of the bottom plate 12 is 13000mm, and the thickness of the bottom plate 12 is 300mm. The length of the side plate 11 is the same as the segment length of the base 1, and the segment length of the bottom plate 12 can be set according to the lifting capacity of the lifting equipment. The width of the gap between adjacent precast modules 104 is 1000mm, determined by factors such as the difficulty of water sealing, the stress on the bottom plate 12, and the requirements for lap splicing or mechanical connection of the bottom reinforcement of the pier. The diameter of the reserved hole 101 is 1400mm, and the outer diameter of the steel pipe pile 3 is 1000mm. The width of the reinforcing beam 13 is 500mm, and the thickness is 600mm.

[0084] In some embodiments, the reinforcing beam 13 is provided with three layers of reinforcement, which are interspersed with the two layers of reinforcement provided in the bottom slab 12.

[0085] The construction method for the above-mentioned semi-underwater concrete pier structure is described in detail below. The construction method includes the following steps: Multiple steel pipe piles 3 are inserted into the underwater soil layer of the area to be constructed, with a preset interval between each steel pipe pile 3, and the lower end of each steel pipe pile 3 is inserted into the soil layer to a preset depth. In the prefabrication process of the segmented prefabricated base 1, the first embedded steel plate 15 and the second embedded steel plate 14 are embedded in the reinforcing beam 13. After the base 1 is prefabricated, the end of the longitudinal beam 51 away from the transverse beam 52 is connected to the first embedded steel plate 15, so that the transverse beam 52 is located above the reserved hole 101 and spans the reserved hole 101, so as to realize the installation of the support 5. Using the hoisting support 5, the base 1 is hoisted to the construction position, and the posture of the base 1 is adjusted so that the reserved hole 101 is aligned with the corresponding steel pipe pile 3. Insert the steel pipe pile 3 into the corresponding reserved hole 101 so that the top of the steel pipe pile 3 abuts against the crossbeam 52, and connect the crossbeam 52 to the top of the steel pipe pile 3 through the leveling bolt 6 to achieve temporary fixation between the base 1 and the steel pipe pile 3. Tighten the leveling bolt 6 to adjust the base 1 to the preset horizontal position; The connector 4 is welded to the second embedded steel plate 14 to install the connector 4 on the base 1 and to connect the connector 4 to the steel pipe pile 3. Pour filling concrete 31 into the joint 301 between the outer wall of the steel pipe pile 3 and the inner wall of the reserved hole 101, and remove the support 5 after the filling concrete 31 is poured. First, pour joint concrete into the splicing joint 103 between adjacent prefabricated modules 104. After the joint concrete is poured, pour concrete layer by layer in the vertical direction in the groove 102 to form concrete layer 2, so as to complete the construction of the semi-underwater concrete pier structure.

[0086] It should be noted that when the water level at the wharf is high, it will be higher than the bottom slab 12, and may even reach half the height of the side slab 11. During the construction of the semi-underwater concrete pier structure, steel pipe piles 3 of different heights can be selected under different water level construction environments, and the thickness of the concrete layer 2 can also be selected according to actual needs. Further details will not be elaborated here.

[0087] Through the description of several embodiments of the semi-underwater concrete pier structure and its construction method of the present invention, it can be seen that the embodiments of the semi-underwater concrete pier structure and its construction method of the present invention have at least one or more of the following advantages: 1. By setting a groove 102 in the base 1, and pouring concrete layer by layer in the groove 102 to form concrete layer 2, not only can the contact area between the base 1 and the concrete layer 2 be increased, and the connection strength between the two be increased, but the groove 102 can also serve as a natural enclosure structure for concrete pouring, eliminating the need for additional formwork, simplifying the construction process of concrete layer 2 pouring, and improving construction efficiency.

[0088] 2. The support component 5 not only provides a lifting point for the base 1, facilitating the lifting of the base 1 by the lifting equipment, but also connects with the steel pipe pile 3 when the steel pipe pile 3 is inserted into the reserved hole 101, realizing temporary fixation between the base 1 and the steel pipe pile 3, providing a foundation for further connection between the base 1 and the steel pipe pile 3; and after the steel pipe pile 3 and the base 1 are fixed by filling with concrete 31 and connecting component 4, the support component 5 can be removed from the base 1, realizing the recycling of the support component 5 and reducing construction costs.

[0089] 3. A reinforcing beam 13 with an upward protrusion is set in the area of ​​the reserved hole 101. This not only improves the structural strength of the stress concentration area and prevents the base 1 from cracking due to excessive local stress, but also increases the axial height of the reserved hole 101 to improve the fit dimensions between the steel pipe pile 3 and the base 1. Furthermore, during the prefabrication of the base 1, the first embedded steel plate 15 and the second embedded steel plate 14 are set in the reinforcing beam 13 to facilitate the subsequent connection between the base 1 and the support member 5 and the connector 4.

[0090] 4. The base 1 adopts a modular design with multiple prefabricated modules 104 spliced ​​together. Each module has at least one reserved hole 101 and is equipped with a separate support 5. This not only reduces the difficulty of overall prefabrication, transportation and hoisting of the base 1, but also adapts to the installation and adjustment needs of the steel pipe pile 3 positioning deviation or terrain differences on site.

[0091] 5. Multiple connections are provided between the base 1 and the steel pipe pile 3. After the steel pipe pile 3 and the base 1 are fitted through the reserved hole 101, not only are the connecting parts 4 arranged around the circumference reinforced for circumferential fixation, but the filling concrete 31 poured in the fitting gap 301 can also make the two form an integral structure, effectively avoiding relative loosening or shaking. Moreover, the filling concrete 31 can also seal the gap, prevent moisture and soil impurities from corroding the steel pipe pile 3 or the connecting parts 4, and extend the service life of the structure.

[0092] 6. The leveling bolts 6 on the support 5 can adjust the level of the base 1, so as to avoid uneven pouring of the subsequent concrete layer 2 or structural stress imbalance caused by the tilt of the base 1, thus ensuring the forming quality of the concrete layer 2 and the installation accuracy of the entire pier structure.

[0093] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0094] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A semi-submerged concrete pier structure, characterized by, The application relates to a construction method of a semi-underwater concrete pier structure. The application comprises the following parts: a steel pipe pile, the lower end of which is inserted into the soil layer under water in a region to be constructed, and the upper end of which is arranged upward; a base, which is provided with a reserved hole for inserting the steel pipe pile; a connecting piece, which is arranged at the reserved hole and used for connecting the base and the steel pipe pile; 2. The semi-submerged concrete pier structure of claim 1, wherein, a concrete layer, which is poured on the base and covers the connecting piece and the top of the steel pipe pile.

3. The semi-submerged concrete pier structure of claim 2, wherein, The base is provided with a groove with an open upper end, the reserved hole is arranged at the groove bottom, and the concrete layer is arranged in the groove.

4. The semi-submerged concrete pier structure of claim 1, wherein, The groove bottom is provided with a reinforcing beam, which is arranged upward on the groove bottom, the reserved hole is arranged through the reinforcing beam along the opening direction, and the connecting piece is connected to the reinforcing beam.

5. A method for constructing a semi-submerged concrete pier structure for the construction of a semi-submerged concrete pier structure according to any one of claims 1-4, c h a r a c t e r i s e d in that The outer wall of the steel pipe pile and the inner wall of the reserved hole have a matching gap, and the matching gap is filled with filling concrete. The construction method comprises the following steps: inserting a plurality of steel pipe piles into the soil layer under water in a region to be constructed, keeping a preset interval between the steel pipe piles, and inserting the lower end of the steel pipe pile into the soil layer to a preset depth; preparing the base, installing a support around the reserved hole on the base after the base is prepared, hoisting the base to the region to be constructed by hoisting the support, adjusting the posture of the base, and aligning the reserved hole with the corresponding steel pipe pile; inserting the steel pipe pile into the corresponding reserved hole, connecting the top of the steel pipe pile with the support, and temporarily fixing the base and the steel pipe pile; installing the connecting piece on the base and connecting the connecting piece with the steel pipe pile; pouring filling concrete into the matching gap between the outer wall of the steel pipe pile and the inner wall of the reserved hole, and removing the support after the filling concrete is poured; 6. The method of constructing a semi-underwater concrete pier structure according to claim 5, wherein vertically pouring the concrete layer on the base layer by layer to complete the construction of the semi-underwater concrete pier structure.

7. The method of constructing a semi-underwater concrete pier structure according to claim 5, wherein The concrete is poured layer by layer in the groove of the base, and no additional formwork is needed during pouring; the maximum thickness of the concrete layer does not exceed the groove depth.

8. The method of constructing a semi-underwater concrete pier structure according to claim 7, wherein During the preparation of the base, a first embedded steel plate and a second embedded steel plate are embedded around the reserved hole, the support is connected to the first embedded steel plate, and the connecting piece is connected to the second embedded steel plate.

9. The method of constructing a semi-underwater concrete pier structure according to claim 5, wherein The support comprises a longitudinal beam and a transverse beam, the transverse beam is connected to one end of the longitudinal beam, during the installation of the support, the end of the longitudinal beam away from the transverse beam is connected to the first embedded steel plate, the transverse beam is arranged above the reserved hole and crosses the reserved hole, so that the top of the steel pipe pile abuts against the transverse beam when the steel pipe pile is inserted into the reserved hole. A leveling bolt is arranged between the support and the top of the steel pipe pile, and the leveling bolt is used for adjusting the levelness of the base; after the base is adjusted to a preset level state by screwing the leveling bolt, the connecting piece is installed on the base.

10. The method of constructing a semi-underwater concrete pier structure according to claim 5, wherein The base is prefabricated in blocks, and comprises a plurality of prefabricated modules, each of which is provided with at least one reserved hole for connecting the prefabricated module with a corresponding steel pipe pile; after the prefabricated modules are temporarily fixed with the corresponding steel pipe piles, the adjacent prefabricated modules have a joint seam, and the plurality of prefabricated modules are connected into a whole after joint seam concrete is poured into the joint seam, and then the base is poured with concrete layer by layer.

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