A high-pile wharf pile top connection structure and construction method thereof

Abstract

The present invention discloses a high-pile wharf pile top connection structure, comprising a prefabricated pile core pile cap with a grouting channel and a grouting plate, a steel cage above the pile cap, transverse and longitudinal beams, two layers of reinforced steel mesh above the steel cage, and a reinforced concrete panel; the reinforced concrete pile core pile cap is prefabricated in advance, and two grouting channels and two overflow channels are reserved in the pile cap; the transverse and longitudinal beams and the concrete panel are also prefabricated reinforced concrete components; the bottom layer of steel bars at the ends of the transverse and longitudinal beams are bent, and shorter steel bars are reserved at the top layer and waist; the steel cage above the pile cap contains a plurality of U-shaped bars and stirrups surrounding the U-shaped bars, and the whole is tied and formed in advance. The present invention also discloses a construction method for a high-pile wharf pile top connection structure. The present invention is prefabricated and does not require traditional welding operations as a whole, thereby avoiding mutual interference when installing the steel bars at the ends of the transverse and longitudinal beams, and improving the degree of assembly and construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of construction of assembled high-pile wharf superstructures in hydraulic engineering projects, and more specifically to a high-pile wharf pile top connection structure and a construction method thereof. Background Art

[0002] The construction of pile cores and pile caps for conventional high-pile wharves is typically cast-in-place. This involves first lowering the pile core reinforcement cage, followed by pouring the core concrete. Once the core concrete reaches the required strength, the pile cap formwork is erected, reinforcement is tied, and the pile cap concrete is poured. Only after the pile cap concrete reaches the required strength can the crossbeams and longitudinal beams be installed.

[0003] The connections between the main bars of the cross beams and the main bars of the longitudinal beams at the top of the pile cap are usually made by lap welding or welding with an additional steel bar, and are done one by one. However, this construction method has the following disadvantages:

[0004] 1) During construction, the pile cap must be constructed after the pile core concrete reaches a certain strength. During construction of the pile cap, the pile cap formwork must be erected, and the horizontal and vertical beams can only be installed after the concrete reaches a certain strength. This results in a long construction time and low efficiency.

[0005] 2) When installing the crossbeams and longitudinal beams, the exposed steel bars at their ends are prone to fighting, and the connections between the main bars of the crossbeams and the main bars of the longitudinal beams are mostly welded one by one, which reduces the construction efficiency. Summary of the Invention

[0006] One object of the present invention is to provide a high-pile wharf pile top connection structure and a construction method thereof, which is prefabricated and does not require traditional welding operations as a whole, avoids mutual interference when installing steel bars at the ends of horizontal and longitudinal beams, and improves the degree of assembly and construction efficiency.

[0007] In order to achieve these purposes and other advantages according to the present invention, a high-pile wharf pile top connection structure is provided, comprising:

[0008] The pile core and pile cap are prefabricated in advance and a grouting plate is fixed to the bottom of the pile core. The pile core is sleeved in the pipe pile and forms a grouting space with the inner wall of the pipe pile. The pile cap is provided with multiple grouting channels and overflow channels corresponding to the grouting space. The grouting space is filled with grouting liquid through the grouting channels. The steel bars inside the pile core and pile cap extend upward to protrude from the top surface.

[0009] The transverse and longitudinal beams are prefabricated in advance and include a pair of transverse beams and a pair of longitudinal beams, and are distributed in a rectangular shape at the centers of the four sides of the top surface of the pile cap. The ends of the transverse and longitudinal beams are respectively placed on adjacent pile caps. The horizontal steel bars at the ends of the transverse and longitudinal beams extend outward and protrude above the pile caps. The lowest horizontal steel bars extending and protruding from the transverse and longitudinal beams continue to extend and bend upward. The vertical stirrups inside the transverse and longitudinal beams extend upward and protrude to the outside.

[0010] A steel cage is integrally bound and formed and falls to the top surface of the pile cap and is fixed in the center of the area surrounded by the four horizontal and vertical beams. The steel cage encloses the bent steel bars at the bottom layer of the horizontal and vertical beams and the steel bars extending upward from the pile core and pile cap.

[0011] Concrete panels, which are prefabricated and placed between adjacent horizontal and vertical beams;

[0012] The concrete block is cast in the space formed by the concrete panel, the transverse and longitudinal beams and the pile core and pile cap, and extends upward to cast the top steel bars of the transverse and longitudinal beams therein.

[0013] Preferably, the protruding top steel bars of a pair of relatively arranged horizontal beams or longitudinal beams are also overlapped by reinforced steel meshes, and the steel meshes are arranged into upper and lower layers, the lower steel meshes are short steel bars, and the upper steel meshes are full-length steel bars.

[0014] Preferably, the steel cage includes a plurality of U-shaped bars and peripheral stirrups, the plurality of U-shaped bars are distributed in a matrix, and the peripheral stirrups are arranged around the outside of the plurality of U-shaped bars.

[0015] Preferably, four grouting channels and overflowing channels are provided at intervals along the circumference above the pipe pile, two of which are grouting channels and the other two are overflowing channels.

[0016] Preferably, the top surface of the pile core and pile cap is configured as a roughened structure with different concave and convex shapes.

[0017] Preferably, the protruding top and waist of the horizontal steel bars of the transverse and longitudinal beams are short and do not interfere with the falling of the steel cage.

[0018] The present invention also provides a construction method for a high-pile wharf pile top connection structure, comprising the following steps:

[0019] S1: Prefabricate reinforced concrete pile cores, pile caps, transverse and longitudinal beams, and concrete panels in advance. Reserve multiple grouting and overflow channels in the pile cores and pile caps. Extend the steel bars inside the pile cores and pile caps upward to the outside. Extend the horizontal steel bars and vertical stirrups in the transverse and longitudinal beams to the outside, and bend the lowest horizontal steel bars in the transverse and longitudinal beams upward after being extended. Also, prepare the steel cage in advance.

[0020] S2: After the pipe pile construction is completed at the construction site, the pile core and pile cap are hoisted to the top of the pipe pile with the help of lifting equipment, and the pile core is assembled into the pipe pile, forming a grouting space between the pile core and the pipe pile;

[0021] S3: Using grouting equipment, grouting liquid is poured into the grouting space through the grouting channel to connect the pile core, pile cap and pipe pile into one;

[0022] S4: Using lifting equipment, install the prefabricated horizontal and longitudinal beams to the four sides of the pile cap;

[0023] S5: Install the steel cage on the pile cap and fix the steel cage to the exposed steel bars protruding from the top of the pile cap. The bent steel bars at the bottom of the horizontal and vertical beams are located inside the steel cage.

[0024] S7: Install prefabricated reinforced concrete panels;

[0025] S8: Integrally pour concrete above the pile core cap, above the transverse and longitudinal beams, and above the pier concrete panel to form concrete blocks, completing the construction of the high-pile pier pile top connection.

[0026] Preferably, the steps S5 and S7 further include S6: tying and installing a lower layer steel mesh and an upper layer steel mesh between the protruding steel bars on the tops of adjacent transverse and longitudinal beams.

[0027] The present invention has at least the following beneficial effects:

[0028] 1. The pile core and pile cap of the present invention are prefabricated in advance, which avoids on-site formwork and concrete pouring, as well as the process of waiting for the concrete strength to be reached during construction, reduces labor consumption and construction time, and improves the degree of dock assembly and construction efficiency;

[0029] 2. The steel cage above the pile cap of the present invention (except for the steel bars extending from the pile cap) is integrally tied and formed in advance and then hung above the pile cap for fixing, thus avoiding on-site tying and welding of steel bars one by one, saving time and improving construction efficiency.

[0030] 3. The exposed steel bars at the top and waist of the transverse and longitudinal beams of the present invention are short, and the exposed steel bars at the bottom are long and bent, which avoids mutual interference between the steel bars at the ends of the transverse and longitudinal beams and the steel cage above the pile cap during installation. Two rows of steel mesh are added to the top of the steel cage above the pile cap to ensure the overall strength of the structure.

[0031] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of the pile core and pile cap of the present invention before installation;

[0033] Figure 2 This is a schematic diagram of the structure of the pile core and pile cap after installation of the present invention;

[0034] Figure 3 This is a schematic diagram of the structure of the pile core and pile cap after installation and grouting of the present invention;

[0035] Figure 4This is an elevation view of the present invention after the transverse and longitudinal beams are installed;

[0036] Figure 5 For the present invention Figure 4 Middle 1-1 cross-section;

[0037] Figure 6 This is a schematic structural diagram of the steel cage above the pile core and pile cap of the present invention;

[0038] Figure 7 For the present invention Figure 6 Section 2-2;

[0039] Figure 8 This is a schematic structural diagram of the present invention after the steel cage is installed above the pile core and pile cap;

[0040] Figure 9 For the present invention Figure 8 Section 3-3;

[0041] Figure 10 This is a schematic structural diagram of the steel mesh after being tied;

[0042] Figure 11 This is a schematic diagram of the structure after the concrete blocks above the pile cap, above the horizontal and longitudinal beams, and above the concrete panel are poured;

[0043] Figure 12 For the present invention Figure 11 Section 4-4.

[0044] Description of reference numerals:

[0045] 1. Pile core and cap, 2. Grouting channel, 3. Pipe pile, 4. Horizontal and longitudinal beams, 5. Grouting space, 6. Slurry, 7. Rebar cage, 8. Lower steel mesh, 9. Upper steel mesh, 10. Concrete block, 11. Grout stop plate, 12. Concrete panel. DETAILED DESCRIPTION

[0046] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0047] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0048] like Figure 11 and Figure 12 As shown, the present invention provides a high-pile wharf pile top connection structure, comprising:

[0049] The pile core and pile cap 1 are prefabricated and have a grouting plate 11 fixed to the bottom of the pile core. The pile core is sleeved within the pipe pile 3 and forms a grouting space 5 on the inner wall of the pipe pile 3. The pile cap is provided with a plurality of grouting channels 2 and overflow channels corresponding to the grouting space 5. The grouting space 5 is filled with slurry 6 through the grouting channels 2. The steel bars inside the pile core and pile cap 1 extend upward to protrude from the top surface.

[0050] The transverse and longitudinal beams 4 are prefabricated in advance and include a pair of transverse beams and a pair of longitudinal beams. They are arranged in a rectangular shape at the centers of the four sides of the top surface of the pile cap. The ends of the transverse and longitudinal beams 4 are respectively placed on adjacent pile caps. The horizontal reinforcement at the ends of the transverse and longitudinal beams 4 extends outward and protrudes above the pile cap. The lowest horizontal reinforcement extending and protruding from the transverse and longitudinal beams 4 continues to extend and bend upward. The internal vertical stirrups of the transverse and longitudinal beams extend upward and protrude externally.

[0051] The steel cage 7 is integrally tied and formed and falls to the top surface of the pile cap and is fixed in the center of the area surrounded by the four horizontal and vertical beams 4. The steel cage 7 encloses the bent steel bars at the bottom layer of the horizontal and vertical beams 4 and the steel bars extending upward from the pile core and pile cap 1;

[0052] Concrete panels 12, which are prefabricated and placed between adjacent horizontal and vertical beams;

[0053] The concrete block 10 is cast in the space formed by the concrete panel 12, the transverse and longitudinal beams 4 and the pile core and pile cap 1, and extends upward to cast the top steel bars of the transverse and longitudinal beams 4 therein.

[0054] In the above technical solution, the reinforced concrete pile cap 1 is prefabricated, with four reserved grouting channels 2 and a grouting plate 11 at the bottom. The transverse and longitudinal beams 4 and concrete face plate 12 are also prefabricated reinforced concrete components. The rebar cage 7 above the pile cap is prefabricated and hoisted on-site using a crane. It is then secured to the protruding rebar at the top of the pile cap, eliminating the need for individual tying and welding on-site and improving construction efficiency.

[0055] The overall construction sequence is: install the precast reinforced concrete pile core cap 1 → grouting in the gap between the pipe pile 3 and the pile core grouting space 5 → install the precast reinforced concrete transverse and longitudinal beams → install the steel cage 7 above the pile cap → tie the double-layer steel mesh → install the precast reinforced concrete panel 12 → cast the concrete blocks 10 above the pile cap, above the transverse and longitudinal beams 4 and the concrete panel 12.

[0056] In another technical solution, the protruding top steel bars of a pair of opposing horizontal or longitudinal beams are overlapped by a reinforced steel mesh. The steel mesh is arranged in a double layer, with the lower steel mesh 8 being short steel bars and the upper steel mesh 9 being full-length steel bars. The steel mesh serves to strengthen the overall structural strength.

[0057] In another technical solution, Figure 6 and Figure 7 As shown, the steel cage 7 includes a plurality of U-shaped bars and peripheral stirrups, the plurality of U-shaped bars are distributed in a matrix, and the peripheral stirrups are arranged around the outside of the plurality of U-shaped bars.

[0058] In another technical solution, four grouting channels 2 and overflow channels are arranged at intervals along the circumference above the pipe pile 3, two of which are grouting channels and the other two are overflow channels. The pipe pile 3 is a steel pipe pile or a concrete pipe pile.

[0059] In another technical solution, the top surface of the pile core and pile cap 1 is configured as a roughened structure with different concave and convex shapes to increase the bonding strength between the prefabricated old concrete and the cast-in-place new concrete.

[0060] In another technical solution, the protruding top and waist of the horizontal steel bars of the transverse and longitudinal beams 4 are short and do not interfere with the falling of the steel cage 7 .

[0061] The present invention also discloses a construction method for connecting pile tops of high-pile docks, comprising the following steps:

[0062] S1: Prefabricate reinforced concrete pile core cap 1, transverse and longitudinal beams 4, concrete face plate 12 in advance. Reserve multiple grouting channels 2 and overflow channels in the pile core cap 1. The steel bars inside the pile core cap 1 extend upward to the outside. The horizontal steel bars and vertical stirrups of the transverse and longitudinal beams 4 extend to the outside. The horizontal steel bars of the bottom layer of the transverse and longitudinal beams 4 extend to the outside and then bend upward. At the same time, prepare the steel cage 7 in advance. Figure 6 and Figure 7 As shown;

[0063] S2: After the construction of the pipe pile 3 at the construction site is completed, Figure 1 and Figure 2 As shown, with the help of lifting equipment, the pile core and pile cap 1 are lifted to the top of the pipe pile 3 and the pile core is assembled in the pipe pile 3, forming a grouting space 5 between the pile core and the pipe pile 3;

[0064] S3: If Figure 3 As shown, with the help of grouting equipment, grout 6 is poured into the grouting space 5 through the grouting channel 2 to connect the pile core cap 1 and the pipe pile 3 into one;

[0065] S4: As Figure 4 and Figure 5 As shown, with the help of lifting equipment, prefabricated transverse and longitudinal beams 4 are installed to the four sides of the pile cap;

[0066] S5: If Figure 8 and Figure 9 As shown, a steel cage 7 is installed on the pile cap, and the steel cage 7 is fixed to the exposed steel bars protruding from the top of the pile cap 1, and the bent steel bars at the bottom of the transverse and longitudinal beams 4 are located in the steel cage 7;

[0067] S6: As Figure 10 As shown, the lower steel mesh 8 and the upper steel mesh 9 are tied and installed between the protruding steel bars on the top of the adjacent transverse and longitudinal beams 4;

[0068] S7: Installing prefabricated reinforced concrete panels 12;

[0069] S8: Figure 11 and Figure 12 As shown, concrete is integrally poured above the pile core cap 1, above the transverse and longitudinal beams 4, and above the wharf concrete panel 12 to form a concrete block 10, completing the construction of the high-pile wharf pile top connection.

[0070] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. 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 illustrations shown and described herein.

Claims

1. A high-pile wharf pile top connection structure, characterized in that: include: The pile core and pile cap are prefabricated in advance and a grouting plate is fixed to the bottom of the pile core. The pile core is sleeved in the pipe pile and forms a grouting space with the inner wall of the pipe pile. The pile cap is provided with multiple grouting channels and overflow channels corresponding to the grouting space. The grouting space is filled with grouting liquid through the grouting channels. The steel bars inside the pile core and pile cap extend upward to protrude from the top surface. The transverse and longitudinal beams are prefabricated in advance and include a pair of transverse beams and a pair of longitudinal beams, and are distributed in a rectangular shape at the centers of the four sides of the top surface of the pile cap. The ends of the transverse and longitudinal beams are respectively placed on adjacent pile caps. The horizontal steel bars at the ends of the transverse and longitudinal beams extend outward and protrude above the pile caps. The lowest horizontal steel bars extending and protruding from the transverse and longitudinal beams continue to extend and bend upward. The vertical stirrups inside the transverse and longitudinal beams extend upward and protrude to the outside. A steel cage is integrally bound and formed and falls to the top surface of the pile cap and is fixed in the center of the area surrounded by the four horizontal and vertical beams. The steel cage encloses the bent steel bars at the bottom layer of the horizontal and vertical beams and the steel bars extending upward from the pile core and pile cap. Concrete panels, which are prefabricated and placed between adjacent horizontal and vertical beams; Concrete blocks are cast in the space formed by the concrete panels, transverse and longitudinal beams and pile cores and caps, and extend upward to cast the top steel bars of the transverse and longitudinal beams therein; The protruding top steel bars of a pair of oppositely arranged transverse beams or longitudinal beams are also overlapped by reinforced steel meshes. The steel meshes are arranged in two layers, the lower layer steel meshes are short steel bars, and the upper layer steel meshes are full-length steel bars. The steel cage includes a plurality of U-shaped bars and peripheral stirrups, wherein the plurality of U-shaped bars are distributed in a matrix, and the peripheral stirrups are arranged around the outside of the plurality of U-shaped bars.

2. The high-pile wharf pile top connection structure according to claim 1, characterized in that: A total of four grouting channels and overflow channels are arranged at intervals along the circumference above the pipe pile, two of which are grouting channels and the other two are overflow channels.

3. The high-pile wharf pile top connection structure according to claim 1, characterized in that: The top surface of the pile core and pile cap is arranged to have a roughened structure with different concave and convex shapes.

4. The high-pile wharf pile top connection structure according to claim 1, characterized in that: The protruding top and waist of the horizontal steel bars of the transverse and longitudinal beams are short and do not interfere with the falling of the steel cage.

5. A construction method for a high-pile wharf pile top connection structure, characterized in that: The steps include: S1: Prefabricate reinforced concrete pile cores, pile caps, transverse and longitudinal beams, and concrete panels in advance. Reserve multiple grouting and overflow channels in the pile cores and pile caps. Extend the steel bars inside the pile cores and pile caps upward to the outside. Extend the horizontal steel bars and vertical stirrups in the transverse and longitudinal beams to the outside, and bend the lowest horizontal steel bars in the transverse and longitudinal beams upward after being extended. Also, prepare the steel cage in advance. S2: After the pipe pile construction is completed at the construction site, the pile core and pile cap are hoisted to the top of the pipe pile with the help of lifting equipment, and the pile core is assembled into the pipe pile, forming a grouting space between the pile core and the pipe pile; S3: Using grouting equipment, grouting liquid is poured into the grouting space through the grouting channel to connect the pile core, pile cap and pipe pile into one; S4: Using lifting equipment, install the prefabricated horizontal and longitudinal beams to the four sides of the pile cap; S5: Install the steel cage on the pile cap and fix the steel cage to the exposed steel bars protruding from the top of the pile cap. The bent steel bars at the bottom of the horizontal and vertical beams are located inside the steel cage. S7: Install prefabricated reinforced concrete panels; S8: Integrally pour concrete above the pile core cap, above the transverse and longitudinal beams, and above the pier concrete panel to form concrete blocks, completing the construction of the high-pile pier pile top connection.

6. The construction method of the high-pile wharf pile top connection structure according to claim 5, characterized in that: The method further includes S6 before steps S5 and S7: tying and installing a lower layer steel mesh and an upper layer steel mesh between the protruding steel bars on the tops of adjacent transverse and longitudinal beams.

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