A bearing platform structure and a construction method thereof

Abstract

The present application relates to a kind of bearing platform structure and its construction method, it includes: multiple pile foundations;First bearing platform shell, the first bearing platform shell has notch in, the bottom of the first bearing platform shell is fixed to the top of multiple pile foundations;Second bearing platform shell, the second bearing platform shell is hollowly arranged, one end of the second bearing platform shell is set on the outer wall of the first bearing platform shell;The inside of the notch forms first filling area, the inside of the second bearing platform shell and the top surface of the notch form second filling area;Concrete is poured in the first filling area and the second filling area, to make the first filling area form lower bearing platform, the second filling area forms upper bearing platform.The present application realizes segmented construction, significantly improves the construction efficiency of bearing platform, reduces construction measure input and reduces safety risk, and structure is simple, stress is clear, and it is convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering construction, and in particular to a pier cap structure and its construction method. Background Technology

[0002] With the continuous development of my country's economic construction, infrastructure construction is gradually moving towards deep water and the ocean. In recent years, my country has built many concrete structures such as bridges and deep-water ports in coastal areas. Most of them are designed as high-pile foundation structures. During the construction period, the effective construction time and working environment conditions are greatly affected by tidal changes.

[0003] In related technologies, the most commonly used approach is to prefabricate the entire pier cap structure, transport it to the bridge site, and then install it. However, this method requires the use of heavy-duty hoisting equipment for the overall prefabrication and hoisting of the pier cap structure. It also results in poor precise alignment and fixation between the pier cap and the pile foundation, and fails to effectively solve the problem of stress concentration, which has always been a difficult problem for engineers. Summary of the Invention

[0004] This invention provides a pier cap structure and its construction method to solve the problems in related technologies, such as the need for large-tonnage hoisting equipment for the overall prefabrication and hoisting of pier cap structures, poor precise alignment and fixing effect between the pier cap and pile foundation, and the inability to effectively solve the problem of stress concentration, which has always been a problem that has troubled engineers.

[0005] Firstly, a foundation structure is provided, comprising:

[0006] Multiple pile foundations;

[0007] The first pier shell has a groove inside, and the bottom of the first pier shell is fixed to the top of the plurality of pile foundations;

[0008] The second support shell is hollow, and one end of the second support shell is fitted onto the outer wall of the first support shell.

[0009] A first filling area is formed inside the slot, and a second filling area is formed between the inside of the second support shell and the top surface of the slot;

[0010] Concrete is poured into both the first filling area and the second filling area so that the first filling area forms the lower foundation and the second filling area forms the upper foundation.

[0011] In some embodiments, the first pier housing includes:

[0012] Multiple first plates, each first plate being fitted onto one of the pile foundations, and the multiple first plates being fixed to each other to form the bottom plate of the first pile cap shell;

[0013] The first plates located around the perimeter of the base plate are provided with integrally formed outward flanges, and the multiple outward flanges are fixed to each other to form the side plates of the first support shell.

[0014] The inner sides of the multiple first plates and the inner sides of the multiple outward flanges are all provided with steel ribs.

[0015] In some embodiments, the inner sidewall of the second support housing is provided with a protrusion, and the second support housing is disposed on the top of the first support housing via the protrusion;

[0016] The inner side of the second foundation shell is reinforced with steel bars.

[0017] In some embodiments, the second support housing includes: a plurality of second plates, each of which has a protrusion on its inner sidewall, the protrusions being disposed on the top of the first support housing, and the plurality of second plates being fixed to each other and forming a second filling area between themselves and the top surface of the slot;

[0018] The inner sides of multiple second plates are reinforced with steel bars.

[0019] In some embodiments, along the height direction, the sidewalls of a plurality of the second plates at least partially overlap with the sidewalls of the first support housing.

[0020] Secondly, a construction method for a foundation structure is provided, including the following steps:

[0021] A first pier shell with a slotted structure is installed on top of multiple pile foundations; wherein, the interior of the slot forms a first filling area, and the top of the pile foundation extends through the slot.

[0022] internal;

[0023] 5. Pour concrete into the first filling area to complete the construction of the lower foundation;

[0024] A hollow second foundation shell is installed on the outer wall of the first foundation shell; wherein, a second filling area is formed between the interior of the second foundation shell and the lower foundation.

[0025] Concrete is poured into the second filling area to complete the construction of the upper foundation; wherein...

[0026] The reinforcing bars in the lower foundation are at least partially located in the second filling area, so that the lower foundation and the upper foundation form an integral whole.

[0027] In some embodiments, the installation of the first five-slotted pile cap shell on top of the plurality of pile foundations further includes:

[0028] A first plate is fitted and fixed to the outer wall of the top of each pile foundation;

[0029] Wet joint construction is carried out between multiple first plates to form the base plate of the first support shell; wherein, multiple first plates located at the four edges of the base plate are provided with integrally formed outward flanges.

[0030] 0 Wet joint construction is carried out between the multiple outward flanges to form the side plate of the first pier shell.

[0031] In some embodiments, the step of fixing a first plate to the outer wall of the top of each pile foundation further includes:

[0032] A clamp is installed on the outer wall of the top of each pile foundation; wherein, multiple clamps are located on the same horizontal plane;

[0033] A first plate is placed above each of the pile foundations, so that the first plate passes through the top of the pile foundation and rests on the top of the clamp.

[0034] The first plate is installed and fixed onto the corresponding clamp.

[0035] In some embodiments, the installation of a hollow second base shell on the outer side wall of the first base shell further includes:

[0036] Multiple second plates are installed on the outer side wall of the first support shell; wherein the multiple second plates and the top surface of the lower support form the second filling area;

[0037] Wet joint construction is carried out between multiple second plates;

[0038] Concrete is poured into the second filling area to complete the construction of the upper foundation.

[0039] 5. In some embodiments, the installation of a plurality of second plates on the outer side wall of the first support housing further includes:

[0040] Lower the second plate so that the protrusion on the second plate overlaps the top of the lower support platform, thus completing the lowering of the second plate.

[0041] The beneficial effects of the technical solution provided by this invention include: utilizing the low water level window of the tide, the installation of the first pier shell can be completed quickly and conveniently, concrete can be poured into the first filling area, the construction of the lower half of the pier can be completed quickly, and then the second pier shell can be overlapped and installed, concrete can be poured into the second filling area, thus completing the construction of the upper half of the pier, thereby completing the construction of the entire pier; after the construction of the lower half of the pier is completed, the foundation height of the pier is increased, so that the upper half of the pier is no longer affected by the water level changes of the tide, realizing segmented construction, significantly improving the construction efficiency of the pier, reducing the investment in construction measures and reducing safety risks, and the structure is simple, the stress is clear, and the operation is convenient. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a front view of the foundation structure provided in an embodiment of the present invention;

[0044] Figure 2 This is a top view of the pier structure provided in an embodiment of the present invention;

[0045] Figure 3 This is a front view of the pile foundation structure after the installation of the clamps, as provided in an embodiment of the present invention.

[0046] Figure 4 This is a front view of the structure after the first support shell is installed on the top of the clamp according to an embodiment of the present invention;

[0047] Figure 5 This is a front view of the first foundation shell after concrete pouring, as provided in an embodiment of the present invention.

[0048] Figure 6 This is a front view of the structure of the first base shell after the second base shell is installed, according to an embodiment of the present invention.

[0049] Figure 7 This is a front view of the second pier shell after concrete pouring, as provided in an embodiment of the present invention.

[0050] In the figure: 1. First pile cap shell; 11. First filling area; 12. First plate; 13. Outward flange; 2. Pile foundation; 3. Second pile cap shell; 31. Second filling area; 32. Protrusion; 33. Second plate; 4. Lower pile cap; 5. Upper pile cap; 6. Hoop. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] This invention provides a pier cap structure and its construction method to solve the problems in related technologies, such as the need for large-tonnage hoisting equipment for the overall prefabrication and hoisting of pier cap structures, poor precise alignment and fixing effect between the pier cap and pile foundation, and the inability to effectively solve the problem of stress concentration, which has always been a problem that has troubled engineers.

[0053] like Figure 1 As shown, an embodiment of the present invention provides a foundation structure, which may include: multiple pile foundations 2; a first foundation shell 1, the first foundation shell 1 having a groove inside, the bottom of the first foundation shell 1 being fixed to the top of the multiple pile foundations 2; a second foundation shell 3, the second foundation shell 3 being hollow, wherein the second foundation shell 3 is through from top to bottom, and one end of the second foundation shell 3 being fitted onto the outer wall of the first foundation shell 1; a first filling area 11 is formed inside the groove, and a second filling area 31 is formed between the inside of the second foundation shell 3 and the top surface of the groove, and both the first filling area 11 and the second filling area 31 are filled with concrete; so that the first filling area 11 forms the lower foundation 4, and the second filling area 31 forms the upper foundation 5.

[0054] Specifically, taking advantage of the low water level window of the tide, the first pier shell 1 is installed on top of multiple pile foundations, and concrete is poured into the first filling area 11 to quickly complete the construction of the lower half of the pier. Then, the second pier shell 3 is overlapped and installed, and concrete is poured into the second filling area 31 to complete the construction of the upper half of the pier, thus completing the construction of the entire pier. After the construction of the lower half of the pier is completed, the foundation height of the pier is increased, so that the upper half of the pier is no longer affected by the water level changes of the tide, realizing segmented construction, significantly improving the construction efficiency of the pier, reducing the investment in construction measures and reducing safety risks, and the structure is simple, the stress is clear, and the operation is convenient.

[0055] In some embodiments, such as Figure 2As shown, the first foundation shell 1 may include: multiple first plates 12, each first plate 12 corresponding to one pile foundation 2, and the multiple first plates 12 are fixed to each other. The multiple first plates 12 can be constructed using wet joints to improve their sealing performance, thus forming the bottom plate of the first foundation shell 1; each of the multiple first plates 12 located around the perimeter of the bottom plate is provided with an integrally formed outward flange 13, and the multiple outward flanges 13 are fixed to each other. Similarly, the multiple outward flanges 13 are also constructed using wet joints to form the side plates of the first foundation shell 1; reinforcing bars are provided on the inner sides of the multiple first plates 12 and the inner sides of the multiple outward flanges 13. A reserved hole is provided between the first plates 12 and the outward flanges 13 to install reserved reinforcing bars, facilitating subsequent rapid reinforcement binding and concrete pouring.

[0056] In some embodiments, such as Figure 1 and Figure 2 As shown, the inner wall of the second foundation shell 3 is provided with a protrusion 32, and the second foundation shell 3 is mounted on top of the first foundation shell 1 via the protrusion 32; the inner side of the second foundation shell 3 is provided with reinforcing bars. The bottom of the protrusion 32 can be flat to facilitate overlapping with the top of the first foundation shell 1, or the protrusion 32 can be hook-shaped to fasten to the side wall of the first foundation shell 1, improving the stability of the second foundation shell 3 during installation. The reinforcing bars inside the second foundation shell 3 can be tied to the reinforcing bars pre-reserved at the top of the lower foundation 4, and then the concrete inside the second foundation shell 3 is poured, forming a whole between the upper foundation 5 and the lower foundation 4. The construction of the upper foundation 5 is no longer affected by moisture.

[0057] In some embodiments, such as Figure 2 As shown, the second foundation shell 3 may include: multiple second plates 33, each with a protrusion 32 on its inner sidewall. The protrusions 32 are located on the top of the first foundation shell 1, and the multiple second plates 33 are fixed to each other. The multiple second plates 33 can be constructed using wet joints, forming a second filling area 31 between themselves and the top surface of the groove. Reinforcing bars are provided on the inner sides of each of the multiple second plates 33. The reinforcing bars on the second plates 33 are tied to the reinforcing bars pre-reserved at the top of the lower foundation 4, and reinforcing bars are also tied between the multiple second plates 33, thus completing the installation of the second foundation shell 3.

[0058] In some embodiments, such as Figure 1 As shown, along the height direction, the sidewalls of multiple second plates 33 at least partially overlap with the sidewalls of the first base housing 1. This partial overlap improves the sealing between the second base housing 33 and the first base housing 1.

[0059] In some embodiments, such as Figure 3-7 As shown in the figure, an embodiment of the present invention provides a construction method for a pier structure, including the following steps:

[0060] Step 1: As Figure 3 and Figure 4 As shown, a first pier shell 1 with a slotted structure is installed on the top of multiple pile foundations 2; wherein, a first filling area 11 is formed inside the slot, and the top of the pile foundation 2 extends into the inside of the slot.

[0061] Step Two: As Figure 5 As shown, concrete is poured into the first filling area 11 to complete the construction of the lower foundation 4.

[0062] Step 3: As Figure 6 As shown, a hollow second base shell 3 is installed on the outer wall of the first base shell 1; wherein, a second filling area 31 is formed between the interior of the second base shell 3 and the lower base 4.

[0063] Step Four: As Figure 7 As shown, concrete is poured into the second filling area 31 to complete the construction of the upper foundation 5; wherein, at least part of the steel bars in the lower foundation 4 are located in the second filling area 31, so that the lower foundation 4 and the upper foundation 5 form an integral whole.

[0064] In some embodiments, the step of installing the first pier shell 1 with a slotted structure on top of the plurality of pile foundations 2 in step one may include the following specific steps:

[0065] The first plate 12 is fitted and fixed to the outer wall of the top of each pile foundation 2;

[0066] Wet joint construction is carried out between multiple first plates 12 to form the base plate of the first bearing shell 1; wherein, multiple first plates 12 located at the four edges of the base plate are provided with integrally formed outward flanges 13.

[0067] Wet joint construction is carried out between multiple outwardly turned edges 13 to form the side plate of the first foundation shell 1.

[0068] Specifically, the step of attaching and fixing the first plate 12 to the top outer wall of each pile foundation 2 also includes the following specific steps:

[0069] like Figure 3 As shown, a clamp 6 is installed on the outer wall of the top of each pile foundation 2; wherein, multiple clamps 6 are located on the same horizontal plane;

[0070] A first plate 12 is placed above each pile foundation 2, so that the first plate 12 passes through the top of the pile foundation 2 and rests on the top of the clamp 6;

[0071] The first plate 12 is installed and fixed onto the corresponding clamp 6. The clamp 6 serves to support the first plate 12 and the lower foundation 4, and can be removed after the cast-in-place concrete of the lower foundation 4 meets the design requirements.

[0072] In some embodiments, step three, in which a hollow second base shell 3 is installed on the outer side wall of the first base shell 1, further includes the following specific steps:

[0073] Multiple second plates 33 are installed on the outer side wall of the first foundation shell 1; wherein, the multiple second plates 33 and the top surface of the lower foundation 4 form a second filling area 31;

[0074] Wet joint construction is carried out between multiple second slabs 33; however, since the construction of the upper foundation 5 is no longer affected by moisture, wet joint construction can be omitted between multiple second slabs 33, and simple fixing is sufficient.

[0075] Concrete was poured into the second filling area 31 to complete the construction of the upper foundation 5.

[0076] Specifically, the step of installing multiple second plates 33 on the outer wall of the first bearing housing 1 also includes the following specific steps:

[0077] Lower the second plate 33 so that the protrusion 32 on the second plate 33 overlaps the top of the lower support 4, thus completing the lowering of the second plate 33.

[0078] In summary, based on the tidal changes in height, the foundation is divided into an upper foundation 5 and a lower foundation 4. The cofferdam structure required for the construction of the lower foundation 4 is divided into several small unit structures, specifically the first slab 12, according to the arrangement of the pile foundations 2. The first slab 12 is prefabricated in the prefabrication yard and then installed on site using a crane. The outermost first slab 12 has an "L" shape, while the middle first slab 12 has a slab structure. The middle of the first slab 12 has pre-drilled holes and pre-reinforced bars, with the diameter of the pre-drilled holes determined by the diameter of the underlying pile foundation.

[0079] The construction of the upper foundation 5 is not affected by moisture. Based on the outline dimensions of the foundation, it is divided into several small unit structures, the second slab 33. The second slab 33 is prefabricated in the prefabrication yard and then transported to the site for installation using a crane. The second slab 33 has a slab structure with a protruding protrusion 32 in the middle of its inner side. The position and size of the protrusion 32 are determined according to the structural height of the upper foundation 5.

[0080] After the outer shell of the lower foundation 4 is installed, the wet joint is poured to form a cofferdam structure. Reinforcing bars can then be tied inside the cofferdam, and concrete poured to complete the construction of the lower foundation 4. After the second plate 33 of the upper foundation 5 is installed to form a cofferdam structure, reinforcing bars can then be tied inside the cofferdam, and concrete poured to complete the construction of the upper foundation 5. According to construction specifications, the contact surface between the two foundations requires reserved reinforcing bars and roughening treatment.

[0081] Furthermore, the precise location of the reserved hole in the first plate 12 can be re-measured based on the precise location after the borehole is formed, so that the actual location of the reserved hole can be determined more accurately during the prefabrication of the first plate 12.

[0082] Furthermore, in order to reduce the lifting weight of the second plate 33, the upper foundation 5 can be poured more than twice.

[0083] Furthermore, the inner sides of the first plate 12 and the second plate 33 are provided with pre-embedded steel bars, which are connected with the steel bars of the cast-in-place foundation structure to form an integral structure, which is a component of the foundation structure and does not need to be removed.

[0084] Furthermore, the structure of the pier can be rectangular, square, or any polygonal shape, and the dimensions of its first plate 12 and second plate 33 can be adjusted according to their actual shape.

[0085] Therefore, by breaking down the construction process of the aquatic pier, the larger pier structure is implemented in stages and steps, which minimizes the impact of tidal changes on construction, reduces the specifications of hoisting equipment, eliminates the steel cofferdam in the traditional scheme, and is convenient to operate with low safety risks.

[0086] In the description of this invention, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0087] It should be noted that, in this invention, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and not...

[0088] This does not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusivity.

[0089] The inclusion of sex means that a process, method, article, or apparatus that comprises a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further restrictions...

[0090] In the case of an element defined by the phrase "including one...", it does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the stated element.

[0091] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied without departing from the spirit of the invention.

[0092] In cases of spiritual or territorial limitations, implementation may be found in other embodiments. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A pier structure, characterized in that, It includes: Multiple pile foundations (2); The first foundation shell (1) has a groove inside, and the bottom of the first foundation shell (1) is fixed to the top of the plurality of pile foundations (2); The second base shell (3) is hollow, and one end of the second base shell (3) is fitted onto the outer wall of the first base shell (1). The inside of the slot forms a first filling area (11), and the inside of the second support shell (3) and the top surface of the slot form a second filling area (31). Concrete is poured into both the first filling area (11) and the second filling area (31) so that the first filling area (11) forms the lower foundation (4) and the second filling area (31) forms the upper foundation (5). The first pier housing (1) includes: Multiple first plates (12), each first plate (12) is fitted onto one of the pile foundations (2), and the multiple first plates (12) are fixed to each other to form the bottom plate of the first pile cap shell (1); The first plates (12) located around the perimeter of the base plate are provided with integrally formed outward flanges (13), and the multiple outward flanges (13) are fixed to each other to form the side plates of the first support shell (1); The inner sides of the plurality of first plates (12) and the inner sides of the plurality of outer flanges (13) are provided with reinforcing bars; The second pier housing (3) includes: Multiple second plates (33) are provided with protrusions (32) on their inner sidewalls. The protrusions (32) are provided on the top of the first support housing (1). The multiple second plates (33) are fixed to each other and form the second filling area (31) between them and the top surface of the slot. The inner sides of multiple second plates (33) are provided with reinforcing bars.

2. The pier structure as described in claim 1, characterized in that, The inner wall of the second base shell (3) is provided with a protrusion (32), and the second base shell (3) is provided on the top of the first base shell (1) through the protrusion (32); The inner side of the second foundation shell (3) is provided with reinforcing bars.

3. The pier structure as described in claim 1, characterized in that, Along the height direction, the sidewalls of the plurality of second plates (33) overlap at least partially with the sidewalls of the first pedestal housing (1).

4. A construction method for a pier cap structure, applicable to the pier cap structure described in any one of claims 1-3, characterized in that, Includes the following steps: A first pier shell (1) with a slotted structure is installed on the top of a plurality of pile foundations (2); wherein a first filling area (11) is formed inside the slot, and the top of the pile foundation (2) extends into the inside of the slot; Concrete is poured into the first filling area (11) to complete the construction of the lower foundation (4); A hollow second base shell (3) is installed on the outer wall of the first base shell (1); wherein, a second filling area (31) is formed between the interior of the second base shell (3) and the lower base (4). Concrete is poured into the second filling area (31) to complete the construction of the upper foundation (5); wherein, at least part of the steel bars in the lower foundation (4) are located in the second filling area (31), so that the lower foundation (4) and the upper foundation (5) form an integral whole.

5. The construction method of the pier cap structure as described in claim 4, characterized in that, The installation of a first pier shell (1) with a slotted structure on top of multiple pile foundations (2) further includes: A first plate (12) is fitted and fixed to the top outer wall of each pile foundation (2); Wet joint construction is carried out between multiple first plates (12) to form the bottom plate of the first foundation shell (1); wherein, multiple first plates (12) located at the four edges of the bottom plate are provided with integrally formed outward flanges (13). Wet joint construction is carried out between the multiple outward flanges (13) to form the side plate of the first pier shell (1).

6. The construction method of the pier cap structure as described in claim 5, characterized in that, The method of fixing a first plate (12) to the top outer wall of each pile foundation (2) further includes: A clamp (6) is installed on the top outer wall of each of the pile foundations (2); wherein multiple clamps (6) are located on the same horizontal plane; Place a first plate (12) above each of the pile foundations (2), so that the first plate (12) passes through the top of the pile foundation (2) and rests on the top of the clamp (6); The first plate (12) is installed and fixed on the corresponding clamp (6).

7. The construction method of the pier cap structure as described in claim 4, characterized in that, The second base shell (3), which is hollow and installed on the outer side wall of the first base shell (1), further includes: Multiple second plates (33) are installed on the outer side wall of the first base shell (1); wherein the multiple second plates (33) and the top surface of the lower base (4) form the second filling area (31). Wet joint construction is carried out between multiple second plates (33); Concrete is poured into the second filling area (31) to complete the construction of the upper foundation (5).

8. The construction method of the pier cap structure as described in claim 7, characterized in that, The installation of multiple second plates (33) on the outer side wall of the first support shell (1) further includes: Lower the second plate (33) so that the protrusion (32) on the second plate (33) overlaps the top of the lower support (4), thus completing the lowering of the second plate (33).

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