Prefabricated wharf and construction method

Abstract

The prefabricated wharf is installed on a plurality of rows of steel pipe piles distributed at intervals and comprises a plurality of parallel semi-prefabricated strip foundations, each semi-prefabricated strip foundation is correspondingly installed on one row of steel pipe piles, each semi-prefabricated strip foundation comprises a plurality of prefabricated pile caps connected end to end, and each prefabricated pile cap is of a strip-block-shaped concrete structure; a plurality of connected inter-beam bearing plates are arranged between any two adjacent semi-prefabricated strip foundations, the bottom faces of the inter-beam bearing plates make contact with the top faces of the semi-prefabricated strip foundations, a plurality of box type core molds are fixed to the inter-beam bearing plates in a matrix mode, the concrete cast-in-place part comprises cast-in-place main beams, cast-in-place secondary beams and concrete plate bodies, and the cast-in-place main beams, the cast-in-place secondary beams and the concrete plate bodies are formed on the semi-prefabricated strip foundations in a cast-in-place mode. The semi-prefabricated strip foundations and the inter-beam bearing plates serve as bottom formworks and have good bearing capacity, so that no supporting structure needs to be additionally arranged, the box type core molds arranged in a matrix mode serve as side molds of the cast-in-situ main beams and the cast-in-situ secondary beams, and a beam-slab system distributed in a grid mode can be formed through one-time pouring.

Description

Technical Field

[0001] The present invention relates to the field of concrete construction, and more particularly to a prefabricated wharf and a construction method thereof. Background Art

[0002] In dock engineering projects, high-pile docks are often used. The upper part of the steel pipe piles driven into the seabed is higher than the water surface, and pile caps are installed on the pile heads to carry out subsequent concrete structure construction. In the subsequent construction process, cast-in-place or prefabricated means can be used to complete the dock structure. The construction site of this type of dock is on the water surface. If the process of pouring concrete after on-site formwork is adopted, it will face greater construction organization difficulties. If pure prefabricated components are used in combination with grouting at the nodes, the strength of the beam-column and beam-slab nodes will also be lower than that of the cast-in-place structure.

[0003] The patent application publication number CN116122325A discloses a method for constructing an assembled high-pile wharf. The construction method of this application prefabricates the prefabricated core cap beam and slab as a whole, hoists the whole, and quickly forms a wharf surface channel, which ensures the safety of workers, improves the quality of the project, and can reduce the cost of wharf construction. However, this structure needs to be flipped over and installed after hoisting, and socketed to the end of the pipe pile, which makes the construction difficult. In addition, the components in this technical solution are centered on the pile, and the prefabricated beam and slab are horizontally cantilevered. The bearing capacity of the beam and slab is limited at this time. In the subsequent pouring of the slab concrete or construction stacking process, a support system needs to be installed under the slab, and the construction is also cumbersome.

[0004] The patent with authorization announcement number CN107012828B discloses a fully assembled wharf structure and its installation method, in which prefabricated crossbeams are connected to prefabricated pile cap nodes, and prefabricated longitudinal beams are overlapped on prefabricated pile cap nodes. The nodes between the pile cap nodes, prefabricated crossbeams, and prefabricated longitudinal beams are connected by groove structures and grouting. In this technical solution, all nodes are connected by grouting or sockets. The structural strength and integrity are not as good as cast-in-place or equivalent cast-in-place structures. During use, the plate body and even the beam body are easily damaged.

[0005] Therefore, it is necessary to design a prefabricated wharf structure that has the characteristics of an assembled wharf without formwork, is equivalent to a cast-in-place concrete structure in strength, has simple on-site construction, and has strong structural reliability. Summary of the invention

[0006] An object of the present invention is to provide a prefabricated wharf and a construction method, which has the characteristics of a prefabricated wharf without formwork, and is equivalent to a cast-in-place concrete structure in strength, has simple on-site construction and strong structural reliability.

[0007] In order to achieve these purposes and other advantages according to the present invention, in a first aspect, the present invention provides a prefabricated wharf, which is installed on a plurality of rows of steel pipe piles distributed at intervals, comprising: a plurality of mutually parallel semi-prefabricated strip foundations, each semi-prefabricated strip foundation is correspondingly installed on a row of steel pipe piles, the semi-prefabricated strip foundation comprises a plurality of prefabricated pile caps connected end to end, the prefabricated pile caps are strip-shaped concrete structures; between any two adjacent semi-prefabricated strip foundations, a plurality of beam support plates connected at their ends are supported, the two sides of the bottom surface of the beam support plates are in contact with the top surface of the semi-prefabricated strip foundations, a plurality of box-type core molds are fixed in a matrix manner on the upper surface of the beam support plates, the box-type core molds are hollow box structures; a cast-in-place concrete part, which is formed above the beam support plates and the semi-prefabricated strip foundations, the cast-in-place concrete part comprises a cast-in-place main beam cast on the semi-prefabricated strip foundations, a cast-in-place secondary beam cast between the box-type core molds on the beam support plates, and a concrete slab cast on the box-type core molds.

[0008] Preferably, the prefabricated pile cap is provided with a plurality of pile cap openings corresponding to the steel pipe piles, a supporting plate is installed on the upper end of the pipe body of the steel pipe pile, the top surface of the supporting plate is horizontal, the steel pipe pile extends from the lower end of the corresponding pile cap opening and the bottom surface of the prefabricated pile cap is attached to the top surface of the supporting plate, and concrete is poured in the pile cap opening.

[0009] Preferably, a pile cap wet joint is cast between two adjacent prefabricated pile caps on the same half of the prefabricated strip foundation.

[0010] Preferably, the top surface of the prefabricated pile cap is provided with strip-shaped pile cap upward tongue and groove along the two long sides, and the two sides of the inter-beam support plate are provided with support plate downward beams, and the bottom surface of the support plate downward beam is placed on the semi-prefabricated strip foundation on the corresponding side, and the opposite sides of the two support plate downward beams are in contact with the side walls of the corresponding pile cap upward tongue and groove.

[0011] Preferably, the inter-beam support plates are provided with a plurality of rectangular support plate reserved openings in a matrix manner, and the inter-beam prefabricated plates are provided with continuous reserved openings with upward turned tongue and groove along the edges of the support plate reserved openings. The box-type core mold is a box-type concrete structure open at the bottom, and the box-type core mold corresponds to the support plate reserved openings one by one and is matched and buckled on the support plate reserved openings, and the inner wall of the box-type core mold is in contact with the reserved openings with upward turned tongue and groove.

[0012] Preferably, a circle of continuous sealing coil is attached to the open bottom edge of the box-shaped core mold, and two sides of the sealing coil are turned up and attached to the inner and outer side walls of the box-shaped core mold respectively.

[0013] In a second aspect, the present invention provides a construction method for a prefabricated wharf, comprising the following steps:

[0014] S1. Install a support plate on the outer periphery of the steel pipe pile, and place the prefabricated pile caps on the corresponding steel pipe piles one by one through the lifting equipment to ensure that the prefabricated pile caps are level;

[0015] S2. A hanging formwork is set up at the ends of adjacent precast pile caps, and concrete is poured at the wet joints of the pile caps and in the pile cap openings to form a number of semi-precast strip foundations parallel to each other;

[0016] S3, hoist the inter-beam support plates on the semi-prefabricated strip foundation in sequence, and take blocking measures at the joints between the flipped beams under the support plates and the semi-prefabricated strip foundation;

[0017] S4, lifting the box-shaped core mold and buckling it on the reserved opening of the supporting plate at the corresponding position, and further blocking measures are taken on the joint position between the tongue and groove on the reserved opening and the box-shaped core mold;

[0018] S5. Complete the binding of the main beam reinforcement cage on the upper part of the semi-prefabricated strip foundation;

[0019] S6. Complete the binding of the secondary beam reinforcement cage on the same inter-beam support plate, and form a reliable reinforcement connection relationship between the secondary beam reinforcement cages on both sides of the semi-prefabricated strip foundation;

[0020] S7. Set up the plate reinforcement on the box-type core formwork, and then complete the cast-in-place concrete part on site.

[0021] The present invention has at least the following beneficial effects:

[0022] First, the prefabricated wharf of the present invention uses the assembled semi-prefabricated strip foundation and the supporting plate between beams as the bottom template, which has good bearing capacity, so there is no need to add any supporting structure. The box-shaped core mold arranged in a matrix is ​​used as the side template of the cast-in-place main beam and the cast-in-place secondary beam. Through one pouring, a grid-type distributed beam system can be formed;

[0023] Second, the prefabricated wharf of the present invention has cast-in-place nodes in the beam, slab and column joints, which have significantly improved node strength compared to fully prefabricated components or other types of semi-prefabricated components. In addition to the hoisting operation on site, only the steel bar node position binding operation needs to be carried out, thus avoiding large-scale steel bar binding operations.

[0024] 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

[0025] Figure 1 It is a side schematic diagram of the construction process of a prefabricated wharf before pouring in a technical solution of the present invention;

[0026] Figure 2It is a side view schematic diagram of a prefabricated wharf after casting in a technical solution of the present invention;

[0027] Figure 3 A schematic diagram of the construction process of a prefabricated wharf in a technical solution of the present invention;

[0028] Figure 4 A is a schematic diagram of disassembling a prefabricated wharf in a technical solution of the present invention;

[0029] Figure 5 FIG. b is a schematic diagram of disassembling a prefabricated wharf in a technical solution of the present invention;

[0030] Figure 6 Figure c is a schematic diagram of disassembling a prefabricated wharf in a technical solution of the present invention;

[0031] Figure 7 d is a schematic diagram of disassembly of a prefabricated wharf in a technical solution of the present invention;

[0032] Figure 8 It is a top view schematic diagram of a prefabricated wharf after casting in a technical solution of the present invention;

[0033] Fig. 9 It is a schematic diagram of the installation of the supporting plate between beams and the semi-prefabricated strip foundations on both sides in a technical solution of the present invention;

[0034] Fig.10 It is a schematic diagram of a beam support plate structure in a technical solution of the present invention;

[0035] Fig.11 A top view of a beam support plate in a technical solution of the present invention;

[0036] Fig.12 A schematic diagram of a box-type core mold in a technical solution of the present invention;

[0037] Fig.13 It is a cross-sectional schematic diagram of a box-shaped core mold buckling a reserved opening of a support plate in a technical solution of the present invention;

[0038] Fig.14 A flow chart of semi-prefabricated strip foundation construction in a technical solution of the present invention;

[0039] Fig.15 A schematic diagram of on-site construction in a technical solution of the present invention Figure 1 ;

[0040] Fig.16 A schematic diagram of on-site construction in a technical solution of the present invention Figure 2 .

[0041] Legend: 1-steel pipe pile, 11-supporting plate, 12-reserved reinforcement in steel pipe pile, 2-semi-prefabricated strip foundation, 21-prefabricated pile cap, 210-pile cap opening, 211-upward tongue and groove of pile cap, 22-wet joint of pile cap, 221-reserved reinforcement of wet joint, 23-main beam reinforcement cage, 3-supporting plate between beams, 31-beam under the support plate, 30-reserved opening of the support plate, 32-upward tongue and groove of the reserved opening, 33-reinforcement cage of the support plate, 331- Downward-flipped beam reinforcement cage, 332-transverse reinforcement cage in slab, 34-supporting plate reinforcement beam, 4-box-type core mold, 41-reinforcement in core mold, 42-sealing membrane, 43-sealing coating, 5-secondary beam reinforcement cage, 51-cross beam reinforcement cage, 52-longitudinal beam reinforcement cage, 6-cast-in-place concrete part, 60-concrete slab, 600-cavity in slab, 61-cast-in-place main beam, 62-cast-in-place secondary beam, 621-cast-in-place cross beam, 622-cast-in-place longitudinal beam. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can implement the invention with reference to the description.

[0043] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0044] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the structures and components can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does 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 of the present invention.

[0045] like Figures 1 to 16As shown, the present invention provides a prefabricated wharf, which is installed on a plurality of rows of steel pipe piles 1 distributed at intervals, and comprises: a plurality of mutually parallel semi-prefabricated strip foundations 2, each of which is correspondingly installed on a row of steel pipe piles 1, and the semi-prefabricated strip foundations 2 include a plurality of prefabricated pile caps 21 connected end to end, and the prefabricated pile caps 21 are strip-shaped concrete structures; between any two adjacent semi-prefabricated strip foundations 2, a plurality of beam support plates 3 connected at the ends are supported, and the bottom surfaces of the beam support plates 3 are The edge contacts the top surface of the semi-prefabricated strip foundation 2, and a plurality of box-type core molds 4 are fixed in a matrix manner on the upper surface of the inter-beam supporting plate 3, and the box-type core mold 4 is a hollow box structure; a cast-in-place concrete part 6 is formed above the inter-beam supporting plate 3 and the semi-prefabricated strip foundation 2, and the cast-in-place concrete part 6 includes a cast-in-place main beam 61 cast on the semi-prefabricated strip foundation 2, a cast-in-place secondary beam 62 cast between the box-type core molds 4 on the inter-beam supporting plate 3, and a concrete slab body 60 cast on the box-type core mold 4. In the present technical scheme, the steel pipe pile 1 is a steel pipe concrete structure that has been completed and poured with concrete before the construction of other structures of the wharf. The steel pipe pile 1 can be embedded and the reserved steel bars 12 in the steel pipe pile can be extended out of the steel pipe pile for subsequent binding with other steel bars. The prefabricated pile cap 21 is a concrete block structure that has been processed in a prefabricated component processing plant. The interior of the prefabricated pile cap 21 has been reinforced and the steel bars outside the component can be placed outside according to on-site needs. The prefabricated pile cap 21 can be placed on a number of steel pipe piles 1 by embedding fixings inside or by welding a horizontal support plate at the end of the steel pipe pile 1. The end of the steel pipe pile 1 and the prefabricated pile cap 21 can be connected by using existing grouting nodes, and the gap between two adjacent prefabricated pile caps 21 at the end can be connected by a mature process of cast-in-place or assembled steel structures.

[0046] In the present technical solution, after all the prefabricated pile caps 21 are installed, several rows of semi-prefabricated strip foundations 2 are formed. A beam support plate 3 is supported between any two adjacent semi-prefabricated strip foundations 2. The beam support plate 3 is a concrete plate body with bearing capacity or a steel plate body with ribs. The beam support plate 3 exists as the bottom mold in the subsequent on-site concrete pouring work. The box-type core mold 4 is a concrete box body or a metal box body produced in a prefabricated component processing plant, and its bottom is connected to the beam support plate 3. If the box-type core mold 4 is a closed hollow box body, then the box-type core mold 4 is a closed hollow box body. 4 and the inter-beam support plate 3 need to be fixed or properly anti-floating treated to avoid template displacement during the cast-in-place process. The gaps between the box-type core molds 4 form a grid-like cast-in-place secondary beam 62 after pouring concrete, and the cast-in-place main beam 61 is formed on the semi-prefabricated strip foundation 2 and in the area between the box-type core molds 4 on both sides. The steel cages in the cast-in-place main beam 61 and the cast-in-place secondary beam 62 can be positioned by on-site binding or pre-binding and then hoisting. The steel bar binding form can refer to the existing standard atlas of steel bar binding or select the node form according to the specific stress conditions.

[0047] In the present technical solution, the cast-in-place secondary beam 62 includes a cast-in-place longitudinal beam 622 parallel to the cast-in-place main beam 61 and a cast-in-place cross beam 621 perpendicular to the cast-in-place main beam 61. The sizes of the cast-in-place main beam 61 and the cast-in-place secondary beam 62 need to be designed according to the load conditions of the wharf. The design sizes of the cast-in-place main beam 61 and the cast-in-place secondary beam 62 determine the shape and setting of the box core mold 4. Figure 1 , Figure 2 , Figures 4 to 7 As shown, it shows four different box-type core molds 4 in different forms, Figure 4 , Figure 5 The dimensions and arrangement positions of the box-type core molds 4 with only the cast-in-place beam 621 are shown respectively. In the above two cases, only one row of spaced box-type core molds 4 are stacked on a beam support plate 3. For different spans, the length and width of the box-type core molds 4 need to be adjusted. Figure 4 , Figure 5 The dock unit shown only has cast-in-place main beams 61 and cast-in-place cross beams 62. Figure 6 , Figure 7 In the terminal unit shown, the size of the box core mold 4 used is equivalent to Figure 4 However, since multiple rows of spaced box core molds 4 are stacked on the same inter-beam support plate 3, cast-in-place longitudinal beams 622 are formed between each row of box core molds 4.

[0048] In this technical solution, after the lifting and placement of the inter-beam support plate 3 is completed, it is necessary to seal the gap between the inter-beam support plate 3 and the semi-prefabricated strip foundation 2. The sealing material can be a sponge strip or a waterproof coating to avoid leakage during subsequent concrete pouring operations.

[0049] The technical solution uses the assembled semi-prefabricated strip foundation 2 and the inter-beam supporting plate 3 as the bottom template, which has good bearing capacity and can be used as a stable construction platform without adding any supporting structure. The box-type core mold 4 arranged in a matrix is ​​the side template of the cast-in-place main beam 61 and the cast-in-place secondary beam 62, and the top surface of the box-type core mold 4 is the bottom mold of the concrete slab 60. The box-type core mold 4 forms a cavity 600 in the slab during pouring, so that the overall structure of the wharf reaches strength while greatly reducing the overall weight. The prefabricated wharf of the present invention can form a grid-type distributed beam system through one pouring; the prefabricated wharf in the technical solution, the beam, slab and column nodes are all cast-in-place nodes, which have a significant improvement in node strength compared to completely prefabricated components or other types of semi-prefabricated components. In addition to the hoisting operation on site, it only needs to carry out the steel bar node position binding operation, avoiding large-scale steel bar binding operations.

[0050] In another technical solution, the prefabricated pile cap 21 is provided with a plurality of pile cap openings 210 that match the steel pipe pile 1. A supporting plate 11 is installed on the upper end of the pipe body of the steel pipe pile 1. The top surface of the supporting plate 11 is horizontal. The steel pipe pile 1 extends from the lower end of the corresponding pile cap opening 210 and the bottom surface of the prefabricated pile cap 21 is attached to the top surface of the supporting plate 11. Concrete is poured in the pile cap opening 210. The supporting plate 11 is a structure that can be installed or fixed on the upper part of the steel pipe pile 1. Its top surface is horizontal and larger than the size of the pile cap hole 210. During the hoisting process of the precast pile cap 21, the pile cap hole 210 passes through the corresponding steel pipe pile 1 until the bottom surface of the precast pile cap 21 is placed on the supporting plate 11. The supporting plate 11 completely closes the bottom of the pile cap hole 210. After pouring concrete into the pile cap hole 210, the steel pipe pile 1 and the precast pile cap 21 are cast as a stable whole. The existing node form or splicing method can be used between the steel pipe pile 1 and the precast pile cap 21 to make it more stable.

[0051] In another technical solution, a pile cap wet joint 22 is cast between two adjacent prefabricated pile caps 21 on the same half of the prefabricated strip foundation 2. When all the prefabricated pile caps 21 are connected to the corresponding steel pipe piles 1 and fixed in place, the interval between the two adjacent prefabricated pile caps 21 is uniformly closed with a template and filled with micro-expansive concrete for sealing. Optionally, the connection between the two adjacent prefabricated pile caps 21 can also be completed in the form of a steel structure connector.

[0052] In another technical solution, the top surface of the prefabricated pile cap 21 is provided with a strip-shaped pile cap upward tongue and groove 211 along the two long sides, and the two sides of the inter-beam support plate 3 are provided with support plate downward beams 31 downward, and the bottom surface of the support plate downward beam 31 is placed on the semi-prefabricated strip foundation 2 on the corresponding side, and the opposite sides of the two support plate downward beams 31 are in close contact with the side walls of the corresponding pile cap upward tongue and groove 211, such as Fig. 9 As shown, in the present technical solution, the inter-beam support plate 3 is placed on the prefabricated pile caps 21 on both sides through the support plate lower flip beams 31 on both sides of the bottom surface, and the pile cap upper flip groove 211 fits the inner side of the support plate lower flip beam 31. The inter-beam support plate 3 can be placed more stably on the semi-prefabricated strip foundation 2 without other constraints, and because the pile cap upper flip groove 211 fits closely with the support plate lower flip beam 31, the problem of leakage during the subsequent construction of the cast-in-place concrete part 6 is avoided. The pile cap wet joint Additional sealing measures are also required at the joint between the part 22 and the beam support plate 3. In the present technical solution, a support plate steel cage 33 is provided inside the beam support plate 3, which can make the beam support plate 3 have a better bearing capacity. The support plate steel cage 33 includes a downturned beam steel cage 331. The internal reinforcement of the support plate steel cage 33 also needs to take into account the maximum construction load borne by the beam support plate 3 during the subsequent construction process. When the span of the beam support plate 3 is large or needs to bear a large construction load, such as Fig.10As shown, a supporting plate reinforcing beam 34 may be provided between the supporting plate lower flip beams 31 on both sides. The supporting plate reinforcing beam 34 is perpendicular to the supporting plate lower flip beam 31 , and the bottom surface thereof is not lower than the supporting plate lower flip beam 31 .

[0053] In another technical solution, the inter-beam support plate 3 is provided with a plurality of rectangular support plate reserved openings 30 in a matrix manner, and the inter-beam prefabricated plate 3 is provided with a continuous reserved opening upward tongue-and-groove 32 along the edge of the support plate reserved opening 30. The box-shaped core mold 4 is a box-shaped concrete structure opened at the bottom, and the box-shaped core mold 4 corresponds to the support plate reserved opening 30 one by one and is matched and buckled on the support plate reserved opening 30. The inner wall of the box-shaped core mold 4 is fitted with the reserved opening upward tongue-and-groove 32, as shown in FIG. Figure 10-13 As shown, according to the size design results of the cast-in-place main beam 61 and the cast-in-place secondary beam 62, the specific size and stacking position of the box-type core mold 4 are designed, and then the position of the reserved opening 30 of the support plate on the precast panel 3 between beams is designed based on the above results. The box-type core mold 4 is equipped with an inner core reinforcement 41 to improve the bearing capacity of the box-type core mold 4 and avoid the box-type core mold 4 from being bumped and cracked. The bottom of the box-type core mold 4 is matched with the upper tongue and groove 32 of the reserved opening to avoid leakage of concrete during the construction of the cast-in-place part 6.

[0054] In another technical solution, the open bottom edge of the box-type core mold 4 is fitted with a circle of continuous sealing membrane 42, and the two sides of the sealing membrane 42 are turned up and respectively fitted to the inner and outer side walls of the box-type core mold 4. In this technical solution, the sealing membrane 42 can use a 3mm thick SBS modified asphalt material waterproof membrane, which is adhered to the inner wall, bottom and outer wall of the box-type core mold 4 by fire heating. Before the construction of the cast-in-place concrete part 6, the steel cage has been placed and fixed between the matrix-arranged box-type core molds 4, so there is insufficient space at this time to manually perform sealing inspection. Arranging the sealing membrane 42 at the bottom of the box-type core mold 4 can better play a sealing role between the bottom of the box-type core mold 4 and the reserved upward tongue and groove 32.

[0055] In another technical solution, the construction method of the prefabricated wharf comprises the following steps:

[0056] S1. Install the supporting plate 11 on the outer periphery of the steel pipe pile 1, and place the prefabricated pile caps 21 on the corresponding steel pipe piles 1 one by one through the lifting equipment to ensure that the prefabricated pile caps 21 are level; specifically, before the formal construction of the prefabricated wharf, it is necessary to design the steel pipe piles 1, prefabricated pile caps 2, inter-beam supporting plates 3, box-type core molds 4, and the main beam steel cage 23 and the secondary beam steel cage 5 according to the wharf bearing partition and the required bearing capacity, and consider the node connection design between the main beam steel cage 23 and the secondary beam steel cage 5. The construction process of the steel pipe pile 1 refers to the existing pile foundation construction process, and the supporting plate 11 is installed and fixed manually.

[0057] S2. A hanging formwork is supported at the end of an adjacent prefabricated pile cap 21, and concrete is poured in the wet joint 22 of the pile cap and in the pile cap opening 210 at the same time to form a plurality of mutually parallel semi-prefabricated strip foundations 2; specifically, the concrete in the pile cap opening 210 and the concrete used in the wet joint 22 of the pile cap can be poured in the same batch, and the strength of the concrete used is greater than that of the prefabricated pile cap 2, and the subsequent construction process can only be carried out after the strength of the wet joint 22 of the pile cap reaches at least 50%.

[0058] S3. Hoist the inter-beam supporting plates 3 onto the semi-prefabricated strip foundation 2 in sequence, and take sealing measures at the joints between the lower flipped beams 31 of the supporting plates and the semi-prefabricated strip foundation 2; specifically, after the inter-beam supporting plates 3 are hoisted, it is necessary to cover the reserved openings 30 of the supporting plates with temporary sealing plates, so that the inter-beam supporting plates 3 can be used as a construction platform for loading, and the joints between the lower flipped beams 31 of the supporting plates and the semi-prefabricated strip foundation 2 are sealed with sponge strips or by applying polyurethane coating.

[0059] S4, lift the box-type core mold 4 and buckle it on the reserved opening 30 of the supporting plate at the corresponding position, and take further sealing measures on the joint position between the tongue and groove 32 of the reserved opening and the box-type core mold 4. Specifically, special lifting points need to be reserved on the box-type core mold 4 for lifting operations. During the lifting process, it is necessary to manually check whether the box-type core mold 4 is horizontally buckled on the reserved opening 30 of the supporting plate, and whether the sealing coil 42 is tightly fitted with the tongue and groove 32 of the reserved opening. After all the box-type mold cores 4 are lifted, the sealing coating 43 is manually and uniformly applied at the joints between each box-type mold core 4 and the supporting plate 3 between the beams. The sealing coating 43 can be made of polyurethane coating, and it is applied multiple times to ensure that no leakage occurs later.

[0060] S5. Complete the binding of the main beam steel cage 23 on the upper part of the semi-prefabricated strip foundation 2; specifically, the reserved steel bars 12 in the steel pipe pile can be reserved in the pile cap opening 210 of the prefabricated pile cap 21 before pouring concrete, and the prefabricated pile cap 21 can also throw out pre-embedded steel bars on the upper surface at the beginning of production, and the wet joint portion 22 of the pile cap can also reserve wet joint reserved steel bars 221 before pouring. The main beam steel cage 23 can be manually based on the reserved steel bars 12 in the steel pipe pile and the steel bars thrown out of the prefabricated pile cap 21 as longitudinal steel bars for on-site binding, or it can be constructed into a semi-completed steel cage body off-site, and then hoisted on the semi-prefabricated strip foundation 2 and then tied on-site with the reserved steel bars 12 in the steel pipe pile.

[0061] S6, complete the binding of the secondary beam reinforcement cage 5 on the same inter-beam support plate 3, and form a reliable reinforcement connection relationship between the secondary beam reinforcement cages 5 on both sides of the semi-prefabricated strip foundation 2; specifically, the secondary beam reinforcement cage 5 can be completed before hoisting. After the secondary beam reinforcement cage 5 is hoisted, it is necessary to perform node binding with the adjacent main beam reinforcement cage 23, and the corresponding ends of the secondary beam reinforcement cages 5 on the two adjacent inter-beam support plates 3 need to be connected with reinforcement sleeves or overlapped, such as Figure 6 , Figure 7 As shown, when there are multiple rows of spaced box-type core molds 4 on the inter-beam support plate 3, the secondary beam reinforcement cage 5 includes a transverse beam reinforcement cage 51 and a longitudinal beam reinforcement cage 52.

[0062] S7. Set up the plate reinforcement on the box-type core mold 4, and then complete the cast-in-place concrete part 6 on site. Specifically, the plate reinforcement is tied based on the main beam reinforcement cage 23 and the secondary beam reinforcement cage 5 that have been tied and fixed. Before carrying out the construction of the cast-in-place concrete part 6, it is necessary to check the on-site reinforcement tying situation and perform slag cleaning on the semi-prefabricated strip foundation 2 and the beam support plate 3.

[0063] 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 prefabricated wharf, which is installed on a plurality of rows of steel pipe piles (1) distributed at intervals, characterized in that: include: A plurality of mutually parallel semi-prefabricated strip foundations (2), each semi-prefabricated strip foundation (2) being installed on a row of steel pipe piles (1), the semi-prefabricated strip foundation (2) comprising a plurality of prefabricated pile caps (21) connected end to end, the prefabricated pile caps (21) being strip-shaped concrete structures; Between any two adjacent semi-prefabricated strip foundations (2), a plurality of inter-beam support plates (3) whose ends are connected are supported, the bottom surfaces of the inter-beam support plates (3) are in contact with the top surfaces of the semi-prefabricated strip foundations (2) on both sides, and a plurality of box-shaped core molds (4) are fixed in a matrix manner on the upper surfaces of the inter-beam support plates (3), and the box-shaped core molds (4) are hollow box structures; A cast-in-place concrete part (6) is formed above the inter-beam support plate (3) and the semi-prefabricated strip foundation (2), and the cast-in-place concrete part (6) comprises a cast-in-place main beam (61) cast on the semi-prefabricated strip foundation (2), a cast-in-place secondary beam (62) cast between the box-shaped core mold (4) on the inter-beam support plate (3), and a concrete slab body (60) cast on the box-shaped core mold (4).

2. The prefabricated wharf according to claim 1, characterized in that: The prefabricated pile cap (21) is provided with a plurality of pile cap openings (210) that match the steel pipe pile (1); a support plate (11) is installed on the upper end of the pipe body of the steel pipe pile (1); the top surface of the support plate (11) is horizontal; the steel pipe pile (1) extends from the lower end of the corresponding pile cap opening (210) and the bottom surface of the prefabricated pile cap (21) is attached to the top surface of the support plate (11); and concrete is poured in the pile cap opening (210).

3. The prefabricated wharf according to claim 2, characterized in that: A pile cap wet joint portion (22) is cast between two adjacent prefabricated pile caps (21) on the same half of the prefabricated strip foundation (2).

4. The prefabricated wharf according to claim 1, characterized in that: The top surface of the prefabricated pile cap (21) is provided with strip-shaped pile cap upwardly turned tongue and groove (211) along two long sides, and the two sides of the inter-beam support plate (3) are provided with support plate downward turned beams (31) downward, and the bottom surface of the support plate downward turned beam (31) is placed on the semi-prefabricated strip foundation (2) on the corresponding side, and the opposite side surfaces of the two support plate downward turned beams (31) are in contact with the side walls of the corresponding pile cap upward turned tongue and groove (211).

5. The prefabricated wharf according to claim 1, characterized in that: The inter-beam support plate (3) is provided with a plurality of rectangular support plate reserved openings (30) in a matrix manner, and the inter-beam support plate (3) is provided with continuous reserved opening upwardly turned tongue-and-groove (32) along the edge of the support plate reserved openings (30). The box-shaped core mold (4) is a box-shaped concrete structure with an open bottom, and the box-shaped core mold (4) corresponds to the support plate reserved openings (30) one by one and is matched and buckled on the support plate reserved openings (30), and the inner wall of the box-shaped core mold (4) is in contact with the reserved opening upwardly turned tongue-and-groove (32).

6. The prefabricated wharf according to claim 5, characterized in that: The open bottom edge of the box-shaped core mold (4) is attached with a circle of continuous sealing coil (42), and the two sides of the sealing coil (42) are turned up and attached to the inner and outer side walls of the box-shaped core mold (4) respectively.

7. The construction method of a prefabricated wharf according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Install a support plate (11) on the outer periphery of the steel pipe pile (1), and place the prefabricated pile caps (21) one by one on the corresponding steel pipe pile (1) using a lifting device to ensure that the prefabricated pile caps (21) are level; S2, supporting a hanging formwork at the end of the adjacent prefabricated pile cap (21), and simultaneously pouring concrete in the wet joint portion (22) of the pile cap and the inside of the pile cap hole (210), to form a plurality of mutually parallel semi-prefabricated strip foundations (2); S3, hoisting the inter-beam support plates (3) onto the semi-prefabricated strip foundation (2) in sequence, and taking blocking measures at the joints between the lower flip beam (31) of the support plates and the semi-prefabricated strip foundation (2); S4, lifting and buckling the box-shaped core mold (4) onto the reserved opening (30) of the support plate at the corresponding position, and further blocking measures are taken at the joint position between the tongue-and-groove (32) on the reserved opening and the box-shaped core mold (4); S5, completing the binding of the main beam steel cage (23) on the upper part of the semi-prefabricated strip foundation (2); S6, completing the binding of the secondary beam reinforcement cage (5) on the same inter-beam support plate (3), and forming a reliable reinforcement connection relationship between the secondary beam reinforcement cages (5) on both sides of the semi-prefabricated strip foundation (2); S7, laying out the plate reinforcement on the box-shaped core mold (4), and then completing the cast-in-place concrete part (6) on site.

Images