Construction method of high-pile wharf superstructure

Abstract

The invention relates to the technical field of high-pile wharf construction, in particular to a construction method of a high-pile wharf superstructure, which comprises the following steps of: mounting a concrete shell prefabricated part on a pile foundation and pouring concrete in a pouring space on a cast-in-place structure of a high-pile wharf by taking the concrete shell prefabricated part as a template; the concrete shell prefabricated part and cast-in-place concrete form a whole, formwork mounting and dismounting are avoided, the construction efficiency and construction quality of the high-pile wharf are remarkably improved, and the safety risk is reduced; the concrete shell prefabricated member has the characteristics of standardization, industrialization and structural unitization; for a large prefabricated structure, a pouring bottom die of the upper structure of the high-pile wharf can be formed by assembling a plurality of concrete shell prefabricated parts on a pile foundation through block design, so that the requirement of a project for construction equipment is lowered, the site construction difficulty is lowered, the construction period of the project is shortened, and the construction cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of high-pile wharf construction, and in particular to a construction method for a high-pile wharf superstructure. Background Art

[0002] The upper structure of the high-pile beam-slab wharf involved in offshore operations generally adopts a clamp mechanism and a steel bottom formwork. Some cast-in-place structures need to adopt high-risk construction techniques such as reverse lifting to install and dismantle the formwork. During the installation and dismantling of the formwork, the operators need to be suspended in the air by a lifting device to perform the operation. During the operation, the lifting device is prone to shaking, which makes the installation and dismantling of the formwork difficult, resulting in a long time-consuming water operation for casting the upper structure of the high-pile wharf, and the construction period cannot be guaranteed; moreover, the construction process is easily affected by the tide, and the construction efficiency is poor, which prolongs the offshore operation period and increases the construction cost. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art in that the construction efficiency of casting a high-pile beam-slab wharf superstructure is low and the safety risk is relatively large during the construction process, and to provide a construction method for a high-pile wharf superstructure.

[0004] The present invention provides a construction method for a high-pile wharf superstructure, comprising the following steps: S1: Prefabrication of precast parts: Prefabrication of concrete shell precast parts for forming the bottom formwork for pouring high-pile piers; The precast concrete shell precast parts are used as the bottom formwork for pouring the high-pile wharf. When pouring the upper structure of the high-pile wharf, the concrete shell precast parts can form an integral part with the poured concrete, thereby avoiding the installation and disassembly of the formwork; S2: Installing the clamp mechanism: installing the clamp mechanism for supporting the concrete shell prefabricated component at the pile head of the pile foundation; The hoop mechanism supports the bottom of the concrete shell prefabricated component, so that the concrete shell prefabricated component can be fixed at a specified height of the pile foundation; S3: Performing point layout: performing point layout of the installation position of the concrete shell prefabricated component on the clamp mechanism according to the installation position of the concrete shell prefabricated component; By point layout, the installation position of the limiter is determined according to the installation position of the concrete shell prefabricated component, so that the limiter can limit the concrete shell prefabricated component and the concrete shell prefabricated component is limited and fixed at the specified position; S4: welding a limiting part: according to the point layout information in S3, a limiting part for limiting the concrete shell prefabricated part is welded on the clamp mechanism; Under the action of multiple limiting parts, the concrete shell prefabricated parts can be limited and fixed at a predetermined position; S5: Installing prefabricated parts: installing the concrete shell prefabricated parts on the clamping mechanism, and fixing the concrete shell prefabricated parts by limiting parts; The concrete shell prefabricated component is installed and fixed at a predetermined position. The stopper can quickly locate the installation position of the concrete shell prefabricated component and can quickly install the concrete shell prefabricated component. S6: pouring high-pile wharf: pouring concrete in the concrete shell precast parts to form the upper structure of the high-pile wharf; By pouring concrete in the concrete shell precast part, the cast-in-place concrete forms a whole with the concrete shell precast part after solidification, thereby forming the upper structure of the high-pile wharf; The invention discloses a construction method for the upper structure of a high-pile wharf. The method comprises the following steps: a prefabricated concrete shell precast member is used to form a casting bottom formwork for the upper structure of the high-pile wharf, thereby avoiding the installation and disassembly of the formwork. In order to fix the concrete shell precast member at a specified position of a pile foundation, a fixed clamping mechanism is installed on the pile foundation so that the concrete shell precast member is supported by the clamping mechanism, thereby fixing the concrete shell precast member at a specified height of the pile foundation. In order to ensure the accuracy of the installation position of the concrete shell precast member, a limiter is arranged on the clamping mechanism. The welding position of the limiter is determined according to the point position setting data of the concrete shell precast member after the clamping mechanism is installed in place, so that the limiter can guide the concrete shell precast member to be quickly installed on the pile foundation, thereby avoiding the displacement of the installation position of the concrete shell precast member. After the cast-in-place concrete is solidified, it forms a whole with the concrete shell precast member. By adopting a construction method for the upper structure of a high-pile wharf, the difficulty of the high-pile wharf casting operation is reduced, the operation safety is ensured, and the casting efficiency of the high-pile wharf is improved.

[0005] Preferably, in S1, the prefabricated concrete shell comprises a bottom plate and a wall body, the wall body and the bottom plate are connected on the top of the bottom plate to form a casting space, and the casting space is used to accommodate concrete.

[0006] The precast concrete shell parts are formed into groove-shaped structural parts by enclosing the bottom plate and the wall body. When the precast concrete shell parts are produced, they are poured according to the size of the high-pile wharf, so that multiple precast concrete shell parts can be assembled or one precast concrete shell part can form the outer contour of the high-pile wharf. The groove of the groove structural part serves as a pouring space, and concrete can be filled in the pouring space. Since the pouring space of concrete is reserved inside the precast concrete shell parts, the weight of the precast concrete shell parts is appropriate, which is convenient for carrying and hoisting the precast concrete shell parts.

[0007] Preferably, the bottom plate is provided with a pile hole for the pile foundation to pass through, and when the pile foundation is a straight pile, the reserved size of the pile hole is 40 cm larger than the diameter of the pile foundation; when the pile foundation is an inclined pile, the reserved size of the pile hole is 50 cm larger than the diameter of the pile foundation.

[0008] Pile holes are provided on the bottom plate for the pile foundation to pass through. The pile holes are usually provided in plural so that the concrete shell precast parts can be initially positioned by docking with the pile foundation through the pile holes during installation. At the same time, the top of the pile foundation is located in the pouring space. When the pouring space is filled with concrete, the concrete in the pouring space can flow into the pile foundation, so that the upper structure of the high-pile wharf and the pile foundation form an integral structure, thereby ensuring the firmness of the high-pile wharf. By reserving pile holes, the size of the pile holes can be adjusted according to different types of pile foundations, so as to facilitate the docking of the pile holes with the pile foundation.

[0009] Preferably, a plurality of support frames are provided on the side of the wall body away from the pouring space, the support frames are detachably connected to the wall body, and a walkway board and a guardrail are provided on the top of the support frames.

[0010] By arranging a support frame on the wall and arranging a walkway board on the support frame, workers can step on the walkway board to carry out construction, which makes construction more convenient for workers. The guardrail can prevent workers from falling, thereby ensuring the construction safety of workers. Since the support frame extends a certain range of the concrete shell prefabricated parts, in order to avoid damage to the concrete shell prefabricated parts during transportation, the support frame and the wall are detachably connected, and the support frame, walkway board and guardrail are installed after the concrete shell prefabricated parts are transported to the construction site. In some embodiments, a bolt connection part is pre-embedded in the wall, and the support frame is connected and fixed to the wall by bolt connection.

[0011] Preferably, the top surface of the base plate is roughened, and a plurality of lifting ears are provided on the base plate, and the lifting ears are located in the casting space; the wall body is provided with a steel bar connecting part, and the steel bar connecting part is used to connect with a steel bar cage placed in the casting space.

[0012] The bottom plate in the casting space is roughened by roughening, so that the cast-in-place concrete filled in the casting space is firmly connected to the bottom plate after solidification; lifting ears are arranged on the bottom plate to facilitate the lifting of the concrete shell prefabricated parts; at least four lifting ears are arranged, which are respectively located at the corners of the bottom plate, so as to ensure the smooth lifting of the concrete shell prefabricated parts; after the casting space is filled with concrete, the lifting ears are embedded in the concrete after the cast-in-place concrete solidifies, so as to strengthen the connection strength between the concrete shell prefabricated parts and the cast-in-place concrete; a steel bar connection part is arranged on the wall on one side of the casting space, and the steel bar connection part is a steel bar column partially embedded in the wall body. Before pouring concrete into the casting space, a steel bar cage is set up in the casting space to connect the steel bar cage with the steel bar column, so as to ensure the overall structural strength of the concrete shell prefabricated parts and the cast concrete.

[0013] Preferably, in S1, when prefabricating the concrete shell precast parts, the bottom plate is cast for the first time and the wall body is cast for the second time, and the thickness of the bottom plate and the wall body are both 20 cm.

[0014] Through the process of pouring in batches, the concrete shell precast parts are easier to cast and mold, and the molding difficulty of the concrete shell precast parts is reduced. The thickness of the bottom plate and the wall body is 20 cm, so that the overall weight of the concrete shell precast parts is controlled within a reasonable range, which is convenient for transportation and hoisting, and the concrete shell precast parts have sufficient structural strength. After the bottom plate casting is completed and confirmed to be correct, the wall body is cast.

[0015] Preferably, in S2, the clamp mechanism is an annular structural member, and the clamp mechanism is provided with a support plate and a plurality of support bars, the support bars are connected to the outer wall of the clamp mechanism, all the support bars are located in the same horizontal plane, each of the support bars is connected to the support plate, and the limit member is welded to the support plate.

[0016] The support area of ​​the support plate by the clamp mechanism is increased by the support bars to avoid deformation of the support plate and ensure the support effect. By arranging all the support bars on the same horizontal plane, the support plate is located on the top of the support bars and is supported by all the support bars.

[0017] Preferably, in S2, an anti-skid rubber pad is provided between the clamp mechanism and the pile foundation, and an anti-skid iron plate is welded to the bottom of the clamp mechanism.

[0018] By arranging the anti-skid rubber pad and the anti-skid iron plate, the clamp mechanism can be firmly fixed on the outer wall of the pile foundation, thereby preventing the position deviation of the clamp mechanism from causing the installation position of the concrete shell prefabricated part to be offset. The protrusion on the anti-skid iron plate abuts against the outer wall of the pile foundation, thereby enhancing the fixing effect of the clamp mechanism.

[0019] Preferably, in S4, a side of the limiting member close to the concrete shell prefabricated member is constructed as an inclined edge; the limiting member is a plate-like structural member, and the thickness of the limiting member is not less than 20 cm.

[0020] The concrete shell prefabricated parts are guided by the inclined edges, which makes it easier for the limiting parts to position the concrete shell prefabricated parts, thereby improving the installation efficiency of the concrete shell prefabricated parts.

[0021] Preferably, after the concrete shell prefabricated component is installed, an installation gap of 1 cm is reserved between the concrete shell prefabricated component and the limiting component.

[0022] By reserving a gap, it is easy to overcome the manufacturing error of the concrete shell prefabricated parts, so that the concrete shell prefabricated parts can be more easily installed and fixed at the predetermined position of the pile foundation, thereby improving the construction efficiency.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. A construction method for a high-pile wharf upper structure of the present invention forms a casting bottom formwork for the high-pile wharf upper structure through prefabricated concrete shell precast parts, thereby avoiding the installation and disassembly of the formwork; in order to enable the concrete shell precast parts to be fixed at a specified position of the pile foundation, a fixed clamping mechanism is installed on the pile foundation so that the concrete shell precast parts are supported by the clamping mechanism, thereby fixing the concrete shell precast parts at a specified height of the pile foundation; in order to ensure the accuracy of the installation position of the concrete shell precast parts, a limiter is provided on the clamping mechanism, and the welding position of the limiter is determined according to the point position setting data of the concrete shell precast parts after the clamping mechanism is installed in place, so that the limiter can guide the concrete shell precast parts to be quickly installed on the pile foundation, thereby avoiding the displacement of the installation position of the concrete shell precast parts; after the cast-in-place concrete is solidified, it forms a whole with the concrete shell precast parts; by adopting a construction method for a high-pile wharf upper structure, the difficulty of the high-pile wharf casting operation is reduced, the operation safety is ensured, and the casting efficiency of the high-pile wharf is improved; 2. A construction method for the superstructure of a high-pile wharf of the present invention uses a concrete shell precast part as a template for the cast-in-place structure of the high-pile wharf, installs the concrete shell precast part on the pile foundation and pours concrete in the pouring space, so that the concrete shell precast part and the cast-in-place concrete form a whole, avoiding the installation and removal of the template, significantly improving the construction efficiency and construction quality of the high-pile wharf, and reducing safety risks; the concrete shell precast part has the characteristics of standardization, industrialization and structural unitization; for large-scale prefabricated structures, a block design can be adopted, and a casting bottom template of the superstructure of the high-pile wharf can be formed by assembling multiple concrete shell precast parts on the pile foundation, thereby reducing the project's requirements for construction equipment, reducing the difficulty of on-site construction, shortening the project's construction period, saving construction costs, and having good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a process of a construction method of a high-pile wharf superstructure; Figure 2 It is a structural schematic diagram of a concrete shell prefabricated component of Example 2; Figure 3 It is a structural schematic diagram of the clamp mechanism of Example 2; Figure 4 It is a structural schematic diagram of the casting bottom mold of Example 2; Figure 5 It is a structural schematic diagram of a concrete shell prefabricated component of Example 3; Figure 6 It is a structural schematic diagram of the clamp mechanism of Example 3; Figure 7 It is a structural schematic diagram of a concrete shell prefabricated component of Example 4; Figure 8This is a schematic structural diagram of the concrete shell prefabricated component of Example 4.

[0025] Markings in the figure: 1-base plate, 2-wall, 3-casting space, 41-rebar connection, 51-support frame, 6-lifting ear, 7-bolt connection, 100-pile foundation, 101-hoop mechanism, 102-support plate, 103-limiting member, 104-support bar, 105-inclined surface, 200-Pile Hole. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0027] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0029] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0030] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0031] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0032] Example 1 like Figure 1 As shown, a construction method for a high-pile wharf superstructure comprises the following steps: S1: Prefabrication of precast parts: Prefabrication of concrete shell precast parts for forming the bottom formwork for pouring high-pile piers; S2: Installing the clamp mechanism: installing the clamp mechanism for supporting the concrete shell prefabricated component at the pile head of the pile foundation; S3: Performing point layout: performing point layout of the installation position of the concrete shell prefabricated component on the clamp mechanism according to the installation position of the concrete shell prefabricated component; S4: welding a limiting piece: according to the point layout information in S3, a limiting piece for limiting the concrete shell prefabricated part is welded on the clamp mechanism; S5: Installing prefabricated parts: installing the concrete shell prefabricated parts on the clamping mechanism, and fixing the concrete shell prefabricated parts by limiting parts; S6: Casting of high-pile wharf: Casting of concrete in the precast concrete shell to form the upper structure of the high-pile wharf.

[0033] The casting bottom formwork of the upper structure of the high-pile wharf is formed by prefabricated concrete shell precast parts, avoiding the installation and disassembly of the formwork; in order to enable the concrete shell precast parts to be fixed at the specified position of the pile foundation, a fixed clamping mechanism is installed on the pile foundation so that the concrete shell precast parts are supported by the clamping mechanism, thereby fixing the concrete shell precast parts at the specified height of the pile foundation; in order to ensure the accuracy of the installation position of the concrete shell precast parts, a limiter is set on the clamping mechanism, and the welding position of the limiter is determined according to the point position layout data of the concrete shell precast parts after the clamping mechanism is installed in place, so that the limiter can guide the concrete shell precast parts to be quickly installed on the pile foundation, avoiding the displacement of the installation position of the concrete shell precast parts; after the cast-in-place concrete is solidified, it forms a whole with the concrete shell precast parts; by adopting a construction method for the upper structure of the high-pile wharf, the difficulty of the high-pile wharf casting operation is reduced, the operation safety is guaranteed, and the casting efficiency of the high-pile wharf is improved.

[0034] In one or several embodiments, in S1, the precast concrete shell is composed of a base plate and a wall body, the wall body is perpendicular to the base plate, the wall body is connected to the edge of the base plate, and a groove structure is formed by the wall body and the base plate, so that the wall body is connected to the base plate and a casting space is formed on the top of the base plate, and the casting space is used to accommodate concrete. The cast-in-place concrete in the casting space is connected to the precast concrete shell after solidification to form the upper structure of the high-pile wharf.

[0035] In an optional embodiment, a pile hole is provided on the bottom plate for the pile foundation to pass through, and the pile hole is a square through hole. When the pile foundation is a straight pile, the reserved size of the pile hole is 40 cm larger than the diameter of the pile foundation, that is, the side length of the pile hole is 40 cm larger than the diameter of the pile foundation; when the pile foundation is an inclined pile, the reserved size of the pile hole is 50 cm larger than the diameter of the pile foundation, that is, the side length of the pile hole is 50 cm larger than the diameter of the pile foundation; by designing the size of the pile hole to be larger than the diameter of the pile foundation, it is convenient for the pile foundation to pass through the pile hole; when installing the concrete shell prefabricated parts, by aligning the pile hole with the pile foundation so that the pile foundation passes through the pile hole, the concrete shell prefabricated parts are positioned through multiple pile holes, so that the concrete shell prefabricated parts can be quickly installed on the pile foundation.

[0036] In an optional implementation manner, a plurality of support frames are provided on a side of the wall body away from the pouring space, and the plurality of support frames are arranged in a line on the wall body, and a support plane is provided on the top of all the support frames, and all the support planes are located on the same horizontal plane. The support frames are detachably connected to the wall body, so that the support frames can be easily assembled on the wall body, and a walkway board is provided on the top of the support frame, and the walkway board is supported by the support plane to ensure that the force on the walkway board is more uniform. When personnel stand on the walkway board for construction, the construction safety of the personnel is protected. A guardrail is also provided on the support frame, and the guardrail is located on the side of the walkway board away from the pouring space. The guardrail can prevent personnel from falling; The support frame is detachably connected to the wall, which makes it easier to cast and shape the concrete shell precast parts when pouring them; since the support frame is installed on the outside of the concrete shell precast parts, the occupied area of ​​the concrete shell precast parts can be reduced by disassembling the support frame, which is convenient for transporting the concrete shell precast parts; the support frame, walkway boards and guardrails are all assembled at the construction site of the high-pile wharf; when pouring the wall body, the support frame is connected by pre-embedded bolt connectors in the wall body and connected by the bolt connectors, thereby realizing rapid disassembly and assembly of the support frame; each support frame is fixed by two bolt connectors to avoid position displacement of the support frame.

[0037] In an optional embodiment, the top surface of the base plate is roughened to increase the roughness of the base plate plane within the casting space, thereby ensuring a firm connection between the precast concrete shell and the cast-in-place concrete; a plurality of lifting ears are provided on the base plate, and the lifting arrangement enables the precast concrete shell to be stably lifted by connecting the lifting ears, thereby ensuring the balance of the precast concrete shell during lifting; the lifting ears are located within the casting space, and after the concrete is cast in the casting space, the lifting ears are embedded in the concrete, thereby increasing the connection strength between the cast-in-place concrete and the precast concrete shell; a steel bar connection is provided on the wall body, and before the concrete is cast in the casting space, a steel bar cage is provided in the casting space, and the steel bar connection is connected to the steel bar cage, thereby ensuring the structural strength of the high-pile wharf; when the base plate is a rectangular plate, the four lifting ears are respectively located at the four corners of the base plate.

[0038] In an optional implementation, in S1, when prefabricating the concrete shell precast parts, the base plate is cast for the first time and the wall body is cast for the second time. The thickness of the base plate and the wall body are both 20 cm. After the casting of the base plate is completed and confirmed to be correct, the wall body is cast. By casting in batches, the construction difficulty is reduced, and the concrete shell precast parts can be quickly formed, thereby increasing the production speed of concrete structural parts. The segmented casting makes it easier to control the casting size of the concrete shell precast parts, so that the dimensional accuracy of the concrete shell precast parts after forming is higher.

[0039] In one or several embodiments, in S2, the clamping mechanism is an annular structural member, and the clamping mechanism is formed by two arc-shaped blocks buckled together. The two arc-shaped blocks are buckled together to form a clamping channel, which is convenient for the installation of the clamping mechanism. The shape of the clamping channel is adapted to the shape of the pile foundation, and the contact area between the clamping mechanism and the pile foundation is larger, so that the clamping mechanism can be firmly fixed on the pile foundation; the clamping mechanism is provided with a support plate and a plurality of support bars, and the ends of the support bars are welded and fixed to the outer wall of the clamping mechanism, and all the support bars are located on the same horizontal plane, so that each support bar is connected to the support plate, and the support plate is located at the top of the clamping mechanism, and the limiter is welded to the support plate; a pile-through channel is opened in the middle of the support plate, and the pile foundation can pass through the pile-through channel.

[0040] In an optional embodiment, in S2, an anti-slip rubber pad is provided between the clamping mechanism and the pile foundation to enhance the friction between the pile foundation and the clamping mechanism. An anti-slip iron plate is welded to the bottom of the clamping mechanism to prevent the clamping mechanism from being displaced from the pile foundation after being clamped and fixed. The anti-slip iron plate is an iron plate with a number of protrusions. By welding the anti-slip iron plate to the bottom of the clamping mechanism and by abutting the protrusions against the outer wall of the pile foundation, the clamping mechanism can be prevented from slipping.

[0041] In one or several embodiments, in S4, the side of the limiting member close to the concrete shell precast member is constructed as an inclined edge, which can guide the concrete shell precast member so that the concrete shell precast member can be quickly installed and positioned; the limiting member is a plate-like structural member, and the thickness of the limiting member is not less than 20 cm to avoid deformation of the limiting member.

[0042] In an optional embodiment, after the concrete shell prefabricated part is installed, a 1 cm installation gap is reserved between the concrete shell prefabricated part and the limiting part. The reserved gap overcomes the dimensional error formed during the manufacture of the concrete shell prefabricated part, so that the concrete shell prefabricated part can be quickly installed and fixed.

[0043] Specifically, the concrete shell precast parts are precast with steel formwork, and a one-to-one design is performed according to the size of the concrete shell precast parts. The concrete shell precast parts are cast in two times, namely, the first time the concrete shell bottom plate is cast, and the second time the concrete shell side wall is cast. During the precast process, the position of the pile hole and the position of the embedded parts must be accurately controlled. When precasting precast parts with pile holes, the reserved size of the pile hole position must be larger than the accuracy requirement of the steel pipe pile sinking, and the surplus space after the pile hole is installed is filled with precast concrete slabs. After the concrete shell is cast on the structure, it is a closed shell structure. The embedded parts on the wall need to be placed at the designated position of the wall before casting. For some embedded parts with high accuracy requirements such as fenders and ladders, holes can be directly opened on the template, and it is ensured that the template does not move during concrete pouring. After the prefabricated concrete shell is manufactured, it is transported to the storage area of ​​the high-pile wharf construction site to install the walkway slabs. The support frame is installed according to the pre-buried bolt connectors. The guardrail is connected to the support frame with scaffolding steel pipes and fasteners with a diameter of 48mm to facilitate later disassembly; After the pile foundation construction is completed, it is necessary to carry out elevation setting according to the installation position of the concrete shell prefabricated parts, and mark the bottom elevation of the concrete shell prefabricated parts; before installing the clamp mechanism, a layer of 3mm thick rubber skin is pasted inside the inner circle of the clamp mechanism to increase the friction between the steel pipe pile and the clamp mechanism, and the clamp mechanism is installed with the assistance of a crane. The bolts are tightened according to the designed torque using a torque wrench to fix the clamp mechanism on the pile foundation, and a non-slip iron plate is welded at the bottom of the clamp mechanism to fix the clamp mechanism on the pile foundation. A support plate is welded on the top surface of the clamp mechanism to facilitate later construction. After the installation of the mechanism is completed, the pile head of the pile foundation is cut using the pile head cutting platform; Key points for controlling the installation of the clamp mechanism: The installation height of the clamp mechanism must be accurate, because the construction of offshore pile foundations is greatly affected by hydrology, and the slope of the inclined pile will have some deviations, which may cause the top surface to be uneven after the installation of the clamp mechanism. Therefore, the top surface of the clamp mechanism is controlled during the installation of the clamp mechanism, and the actual installation elevation is lowered. An iron plate is welded on the top surface, which also facilitates the limiting welding and installation of the concrete shell prefabricated parts later; When installing the clamp mechanism, the tightening force of the connecting bolts must meet the design requirements.

[0044] After the installation of the clamp mechanism is completed, the surveyor will mark out the corner points according to the corner point information of the reserved holes of the concrete shell prefabricated parts, and weld the limit parts according to the point layout; the limit parts are made of thick steel plates, and inclined surfaces are set on the limit parts; an installation gap is reserved on each side of the limit plate so that there is a 1cm installation gap between the concrete shell prefabricated parts and the limit parts after installation.

[0045] An analysis report must be drawn up before lifting, and corresponding lifting slings must be prepared. The prefabricated concrete shell parts are transferred from the prefabrication site to the flat barge, and the prefabricated concrete shell parts are brought to the installation position by means of the crane barge and the flat barge. The prefabricated concrete shell parts are controlled by towing ropes during offshore construction, and are positioned and installed according to the welded limiters. After installation, the position of the prefabricated concrete shell parts is accurately checked. Key points for installation of prefabricated concrete shell parts: The installation of prefabricated concrete shell parts must be measured and checked to ensure installation accuracy. After the installation of prefabricated concrete shell parts is completed, the limit devices must be retained. The offshore pipe piles will shake with the waves to avoid displacement of the prefabricated concrete shell parts after installation. After the installation of the prefabricated concrete shell parts is completed, the installation accuracy of the prefabricated concrete shell parts is measured, the installation data of the prefabricated concrete shell parts is organized into documents, and the installation details of the prefabricated concrete shell parts are clearly marked.

[0046] The steel cage is installed by crane barge. Before pouring the pile core steel cage, the pile core is inspected and the anti-corrosion steel bars with a diameter of 16mm are used to connect the pile heads to form a passage between the piles. The sacrificial anode cable is welded to the pile wall and led out for pouring the pile core concrete. The concrete pouring in the concrete shell precast parts is based on the calculated layered thickness. The concrete pouring height of the concrete shell precast parts of the project approach bridge is 1150mm. The hoop mechanism can support a load greater than the construction load, and there is no need to consider stratification. For the pier structure, the pile position is complex and the pipe piles are dense. The concrete shell precast parts and the hoop mechanism can support the load. The safe cast-in-place thickness of concrete corresponding to the load is calculated to be 500mm.

[0047] Example 2 like Figure 2-Figure 4 As shown, a concrete shell precast member used in a construction method for the upper structure of a high-pile wharf is composed of a bottom plate 1 and two wall bodies 2. The two wall bodies 2 are respectively arranged on opposite sides of the bottom plate 1, so that the two wall bodies 2 and the bottom plate 1 together enclose a through-groove structure member, and the through-groove of the through-groove structure member serves as a casting space 3; a lifting lug 6 and a steel bar connecting portion 41 are provided in the casting space 3, the lifting lug 6 is connected to the bottom plate 1, and the steel bar column portion serving as the steel bar connecting portion 41 is embedded in the wall body 2; a plurality of support frames 51 are arranged on one side of the wall body 2 away from the steel bar connecting portion 41, and adjacent support frames 51 are arranged at intervals, and the support frames 51 are connected and fixed to the wall body 2 through bolt connectors 7.

[0048] Specifically, a plurality of support bars 104 are disposed on the top of the clamp mechanism 101, and the support plate 102 is supported by the plurality of support bars 104; a limiting member 103 is disposed on the support plate 102, and the limiting member 103 abuts against the bottom plate 1 to limit and fix the bottom plate 1.

[0049] Specifically, the prefabricated concrete shell is arranged between adjacent pile foundations 100 , and the two ends of the prefabricated concrete shell are respectively overlapped on different support plates 102 , and four limiting members 103 are respectively abutted against the four corners of the prefabricated concrete shell, so that the prefabricated concrete shell is limited and fixed between the adjacent pile foundations 100 .

[0050] Specifically, the limiting member 103 is an angle steel, which is clamped at the corner of the bottom plate 1 to limit the bottom plate 1 .

[0051] Example 3 like Figure 5-Figure 6 As shown, a concrete shell precast member used in a construction method for a high-pile wharf superstructure has a structure that is substantially the same as that of Example 2. The difference from Example 2 is that the concrete shell precast member is composed of a base plate 1 and a plurality of wall bodies 2, and a casting space 3 is formed by enclosing the base plate 1 and the wall bodies 2. A plurality of pile holes 200 are opened on the base plate 1, and pile foundations 100 pass through the pile holes 200 to position the concrete shell precast member.

[0052] Specifically, a limit member 103 is provided on the clamp mechanism 101 , and an inclined surface 105 is provided on a side of the limit member 103 facing the concrete shell prefabricated component to facilitate the guided installation of the concrete shell prefabricated component. The limit member 103 is clamped on the pile hole 200 .

[0053] Specifically, after installation, the support plate 102 seals the pile hole 200 .

[0054] Example 4 like Figure 7-Figure 8 As shown, a concrete shell prefabricated member used in a construction method of a high-pile wharf superstructure has a structure substantially the same as that of Example 3. The difference from Example 3 is that the casting bottom formwork of the high-pile wharf superstructure is composed of two concrete shell prefabricated members assembled by Figure 7 Precast concrete shells and Figure 8 The precast concrete shell parts are spliced ​​together to form the casting bottom form.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction method for a high-pile wharf superstructure, characterized in that: The following steps are involved: S1: Prefabrication of precast parts: Prefabrication of concrete shell precast parts for forming the bottom formwork for pouring high-pile piers; S2: Installing the clamp mechanism: installing the clamp mechanism for supporting the concrete shell prefabricated component at the pile head of the pile foundation; S3: Performing point layout: performing point layout of the installation position of the concrete shell prefabricated component on the clamp mechanism according to the installation position of the concrete shell prefabricated component; S4: welding a limiting part: according to the point layout information in S3, a limiting part for limiting the concrete shell prefabricated part is welded on the clamp mechanism; S5: Installing prefabricated parts: installing the concrete shell prefabricated parts on the clamping mechanism, and fixing the concrete shell prefabricated parts by limiting parts; S6: Casting of high-pile wharf: Casting of concrete in the precast concrete shell to form the upper structure of the high-pile wharf.

2. The construction method of a high-pile wharf superstructure according to claim 1, characterized in that: In S1, the concrete shell prefabricated component includes a bottom plate and a wall body, and the wall body and the bottom plate are connected to the top of the bottom plate to form a casting space, and the casting space is used to accommodate concrete.

3. The construction method of a high-pile wharf superstructure according to claim 2, characterized in that: The bottom plate is provided with a pile hole for the pile foundation to pass through. When the pile foundation is a straight pile, the reserved size of the pile hole is 40 cm larger than the diameter of the pile foundation; when the pile foundation is an inclined pile, the reserved size of the pile hole is 50 cm larger than the diameter of the pile foundation.

4. The construction method of a high-pile wharf superstructure according to claim 2, characterized in that: A plurality of support frames are arranged on one side of the wall body away from the pouring space. The support frames are detachably connected to the wall body, and a walkway board and a guardrail are arranged on the top of the support frames.

5. The construction method of a high-pile wharf superstructure according to claim 2, characterized in that: The top surface of the bottom plate is roughened, and a plurality of lifting ears are arranged on the bottom plate, and the lifting ears are located in the casting space; the wall body is provided with a steel bar connecting part, and the steel bar connecting part is used to connect with a steel bar cage placed in the casting space.

6. The construction method of a high-pile wharf superstructure according to claim 2, characterized in that: In S1, when prefabricating the concrete shell precast parts, the bottom plate is cast for the first time, and the wall body is cast for the second time. The thickness of the bottom plate and the wall body are both 20 cm.

7. The construction method of a high-pile wharf superstructure according to claim 1, characterized in that: In S2, the clamp mechanism is an annular structural member, and the clamp mechanism is provided with a support plate and a plurality of support bars, the support bars are connected to the outer wall of the clamp mechanism, all the support bars are located in the same horizontal plane, each of the support bars is connected to the support plate, and the limit member is welded to the support plate.

8. The construction method of a high-pile wharf superstructure according to claim 1, characterized in that: In S2, an anti-skid rubber pad is provided between the clamp mechanism and the pile foundation, and an anti-skid iron plate is welded to the bottom of the clamp mechanism.

9. A method for constructing a high-pile wharf superstructure according to any one of claims 1 to 8, characterized in that: In S4, the side of the limiting member close to the concrete shell prefabricated member is constructed as an inclined edge; the limiting member is a plate-shaped structural member, and the thickness of the limiting member is not less than 20 cm.

10. The construction method of a high-pile wharf superstructure according to claim 9, characterized in that: After the concrete shell prefabricated component is installed, an installation gap of 1 cm is reserved between the concrete shell prefabricated component and the limiting component.

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