Core column socketed pile structure

Abstract

The utility model discloses a core column socketed pile structure in the technical field of offshore new energy power generation, which comprises a reinforcement cage structure, a steel pipe pile and a rock mass, the bottom of the steel pipe pile is embedded into the rock mass, the reinforcement cage structure is arranged inside the steel pipe pile and the rock mass, and grouting pipes are arranged among the reinforcement cage structure, the steel pipe pile and the rock mass. Gaps among the reinforcement cage structure, the steel pipe piles and the rock mass are filled with grouting materials through grouting pipes, and the reinforcement cage structure comprises a reinforcement cage body. The upper prefabricated concrete block and the lower prefabricated concrete block are prefabricated, then the steel pipe pile, the upper prefabricated concrete block and the lower prefabricated concrete block are conveyed to a site, the upper prefabricated concrete block is installed at the top of the reinforcement cage body, and the lower prefabricated concrete block is installed at the bottom of the reinforcement cage body. And batch prefabrication in factories can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore renewable energy power generation, in particular to a core column rock-embedded pile structure. Background Art

[0002] In recent years, with the increasing scarcity of land resources for onshore photovoltaic power plants, offshore renewable energy has become a new development trend. During the construction of offshore renewable energy projects, due to the shallow depth of bedrock, the foundations of offshore renewable energy facilities must meet the requirements of tensile and bending resistance.

[0003] Chinese patent authorization announcements CN221118542U and CN219527722U both effectively address the bending bearing capacity of pile foundations for offshore photovoltaic applications. However, they cannot address the pullout resistance of pile foundations. This is especially true when offshore photovoltaic sites are located in typhoon zones and the bedrock is shallow. The soil above the bedrock layer cannot provide sufficient pullout resistance for photovoltaic support piles. Conventional rock-embedded piles are difficult to construct offshore, resulting in the following problems:

[0004] (1) Complex construction process. Before the construction of traditional rock-embedded piles, a steel sleeve needs to be separately installed on the outside of the drill bit. That is, the steel sleeve structure needs to be constructed before drilling. After the drilling construction is completed, the steel sleeve needs to be removed. The construction process is relatively complicated.

[0005] (2) Difficulty in hoisting the steel cage. The offshore environment is complex, and the construction period is often accompanied by sea winds and waves, which makes installation difficult. At the same time, the installation position of the steel cage is prone to deviation, which cannot meet the requirements of the protective layer.

[0006] (3) Grouting of rock-embedded piles is difficult. The grouting section of the core rock-embedded pile is located in the full immersion area, and it is difficult to install the grouting pipe to the bottom of the pile foundation. If the grouting pipe cannot be installed to the designated position, it is easy to cause uneven grouting, which will affect the strength of the pile foundation. Utility Model Content

[0007] In order to improve the problem that before the construction of the above-mentioned traditional rock-socketed piles, a steel sleeve needs to be separately set outside the drill bit, that is, the steel sleeve structure needs to be constructed before drilling, and the steel sleeve needs to be removed after the drilling construction is completed, and the construction process is relatively complicated, the utility model provides a core column rock-socketed pile structure.

[0008] The utility model provides a core column rock-embedded pile structure, comprising a steel cage structure, a steel pipe pile and a rock mass, wherein the bottom of the steel pipe pile is embedded in the rock mass, the steel cage structure is installed inside the steel pipe pile and the rock mass, a grouting pipe is provided between the steel cage structure, the steel pipe pile and the rock mass, and the gaps between the steel cage structure, the steel pipe pile and the rock mass are filled with grouting material through the grouting pipe;

[0009] The steel cage structure includes a steel cage body, an upper precast concrete block is installed on the top of the steel cage body, a lifting lug is provided on the top of the upper precast concrete block, an annular steel plate is installed on the bottom of the steel cage body, and a lower precast concrete block is provided on the bottom of the annular steel plate.

[0010] By adopting the above technical solution, the upper precast concrete blocks and the lower precast concrete blocks are precast, and then the steel pipe piles, the upper precast concrete blocks and the lower precast concrete blocks are transported to the site, and the upper precast concrete blocks are installed on the top of the steel cage body, the annular steel plate is installed on the bottom of the steel cage body, and the lower precast concrete blocks are installed on the bottom of the annular steel plate. They are prefabricated in batches in a factory and can be used as a mold for making a steel cage structure. When subjected to force, the force of the upper steel cage body can be effectively transmitted to the annular steel plate at the bottom, so that the side wall of the rock mass is jointly stressed from top to bottom, avoiding the occurrence of local damage to the side wall of the rock mass from top to bottom due to excessive force on the upper part of the rock mass and too little force on the lower part, which makes the compressive and tensile bearing capacity of the pile foundation fail.

[0011] Optionally, the upper precast concrete block includes a first precast concrete ring plate, which is installed on the top of the steel cage body. A first concrete guide block is connected to the edge of the first precast concrete ring plate, and a reserved hole is opened inside the first precast concrete ring plate.

[0012] By adopting the above technical solution, the provision of the first concrete guide block can facilitate the smooth installation of the steel cage structure in the middle of the steel pipe pile during hoisting.

[0013] Optionally, the steel cage body includes main reinforcement, a plurality of stirrups are arranged on the outside of the main reinforcement, the top of the main reinforcement passes through the reserved hole, and an upper nut and a lower nut are respectively arranged between the main reinforcement and the first precast concrete ring plate, the upper nut is located at the top of the first precast concrete ring plate, and the lower nut is located at the bottom of the first precast concrete ring plate, and the bottom of the main reinforcement is connected to the top of the annular steel plate.

[0014] By adopting the above technical solution, the first precast concrete ring plate can be installed on the top of the main reinforcement through the mutual cooperation of the upper nut and the lower nut.

[0015] Optionally, the lower precast concrete block includes a second precast concrete ring plate, which is arranged at the bottom of the annular steel plate, a second guide block is connected to the edge of the second precast concrete ring plate, a precast concrete flange is provided on the inner side of the second precast concrete ring plate, and a precast concrete leg is connected to the bottom of the second precast concrete ring plate. Embedded steel bars are embedded in the interior of the precast concrete flange, and the top of the embedded steel bars abuts against the top of the annular steel plate.

[0016] By adopting the above technical solution, the annular steel plate and the second precast concrete annular plate are fixedly connected by embedded steel bars, and the precast concrete legs are used to ensure that there is a sufficient concrete protective layer at the bottom of the steel cage structure.

[0017] Optionally, fixing clips are pre-embedded on both inner and outer sides of the first precast concrete ring plate and the second precast concrete ring plate, and the cross section of the fixing clips is two-thirds of a circular shape.

[0018] By adopting the above technical solution, the fixing clamp can ensure that the grouting pipe is installed to the bottom of the steel pipe pile together with the steel cage structure during hoisting. During grouting, the grouting pipe is pulled hard to be removed from the opening of the fixing clamp.

[0019] Optionally, the lifting ear includes an embedded steel plate, which is embedded in the interior of the first precast concrete ring plate. The top of the embedded steel plate is connected to the main steel plate, and the upper ends of both sides of the main steel plate are connected to load-bearing circular tubes. The end of the load-bearing circular tube facing away from the main steel plate is connected to an annular sealing plate, and a lifting rope is wrapped around the outside of the load-bearing circular tube.

[0020] By adopting the above technical solution, it is convenient to install the lifting rope on the load-bearing circular tube of the lifting ear, thereby realizing the lifting work of the steel cage structure.

[0021] Optionally, the steel pipe pile includes a steel pipe section, a steel pipe cone section is provided at the bottom of the steel pipe section, and ribs are provided between the bottom of the steel pipe section and the steel pipe cone section.

[0022] By adopting the above technical solution, not only can the steel pipe piles be prevented from being damaged during the piling process, but a reliable connection between the steel pipe piles and the steel cage structure can also be ensured.

[0023] In summary, the present invention has at least one of the following beneficial effects:

[0024] By prefabricating the upper precast concrete blocks and the lower precast concrete blocks, and then transporting the steel pipe piles, the upper precast concrete blocks and the lower precast concrete blocks to the site, and installing the upper precast concrete blocks on the top of the steel cage body and the lower precast concrete blocks on the bottom of the steel cage body, batch prefabrication is carried out in the factory, which can be used as a mold for the production of the steel cage structure.

[0025] By arranging a first concrete guide block on the outside of the upper precast concrete block and a second guide block on the outside of the lower precast concrete block, the steel cage structure can be smoothly installed in the middle of the steel pipe pile during hoisting.

[0026] The fixing clamps provided on the inner and outer sides of the upper and lower precast concrete blocks can ensure that the grouting pipe is installed to the bottom of the steel pipe pile together with the steel cage structure during hoisting, ensuring uniform grouting in the later stage, thereby improving the overall strength of the pile foundation.

[0027] The utility model adopts an annular steel plate, so that the force of the upper steel bars of the core column embedded in the rock pile can be effectively transmitted to the bottom annular steel plate, so that the side walls of the rock mass are jointly stressed from top to bottom, avoiding the situation where the upper part of the rock mass is subjected to excessive force and the lower part is subjected to too little force, resulting in local damage to the side walls of the rock mass from top to bottom, making the compressive and tensile bearing capacity of the pile foundation ineffective. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a schematic diagram of the steel cage structure of the utility model;

[0030] Figure 2 This is a schematic diagram of the top structure of the precast concrete block of the utility model;

[0031] Figure 3 This is a schematic diagram of the front view structure of the upper prefabricated concrete block of the present invention;

[0032] Figure 4 This is a side view of the upper prefabricated concrete block structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the top view of the lower prefabricated concrete block of the present invention;

[0034] Figure 6 This is a schematic diagram of the bottom prefabricated concrete block structure of the present invention when viewed from above;

[0035] Figure 7 This is a schematic diagram of the front view structure of the lower prefabricated concrete block of the present invention;

[0036] Figure 8 This is a side view of the structure of the lower prefabricated concrete block of the present invention;

[0037] Figure 9 This is a schematic diagram of the connection structure between the steel cage and the upper precast concrete block of the utility model;

[0038] Figure 10This is a schematic diagram of the connection structure between the steel cage and the lower precast concrete block of the utility model;

[0039] Figure 11 This is a schematic diagram of the top view of the connection structure of the steel pipe pile and the steel cage of the utility model;

[0040] Figure 12 The overall cross-sectional structure of the utility model is shown as follows Figure 1 ;

[0041] Figure 13 for Figure 12 A partial enlarged view of middle A;

[0042] Figure 14 The overall cross-sectional structure of the utility model is shown as follows Figure 2 ;

[0043] Figure 15 for Figure 14 A partial enlarged view of B in the middle;

[0044] Figure 16 This is a schematic diagram of the steel cage hoisting and grouting structure of the utility model.

[0045] In the figure: 1. Steel cage structure; 11. Upper precast concrete block; 111. First precast concrete ring plate; 112. First concrete guide block; 113. Reserved hole; 12. Steel cage body; 121. Main reinforcement; 122. Stirrups; 123. Upper nut; 124. Lower nut; 13. Annular steel plate; 14. Lower precast concrete block; 141. Second precast concrete ring plate; 142. Second guide block; 143. Precast concrete flange; 144. Precast concrete legs; 145. Embedded steel bars; 15. Lifting lug; 151. Main steel plate; 152. Load-bearing circular tube; 153. Annular cover plate; 154. Embedded steel plate; 16. Fixing clamp; 2. Steel pipe pile; 21. Steel pipe section; 22. Steel pipe cone section; 23. Rib; 3. Grouting material; 4. Rock mass; 5. Grouting pipe; 6. Lifting rope DETAILED DESCRIPTION

[0046] The following is combined with Figure 1-14 The utility model is described in further detail.

[0047] Please refer to the attached figure in the instruction manual Figure 1 、 Figure 11-16 This embodiment introduces a core column rock-embedded pile structure, comprising a steel cage structure 1, a steel pipe pile 2, and a rock mass 4. The bottom of the steel pipe pile 2 is embedded in the rock mass 4. The steel pipe pile 2 includes a steel pipe section 21, a steel pipe tapered section 22 disposed at the bottom of the steel pipe section 21, and ribs 23 disposed between the bottom of the steel pipe section 21 and the steel pipe tapered section 22. This not only prevents damage to the steel pipe pile 2 during the driving process, but also ensures a reliable connection between the steel pipe pile 2 and the steel cage structure 1.

[0048] Please refer to the attached figure in the instruction manual Figure 12 、 Figure 13 and Figure 14 The steel cage structure 1 is placed inside the steel pipe pile 2 and the rock mass 4. The height ratio of the steel cage structure 1 inside the steel pipe pile 2 and the rock mass 4 is 1.5:1. Grouting pipes 5 are arranged between the steel cage structure 1, the steel pipe pile 2 and the rock mass 4. The gaps between the steel cage structure 1, the steel pipe pile 2 and the rock mass 4 are filled with grouting material 3 through the grouting pipes 5 and filled to about 70 mm above the steel cage structure 1.

[0049] Please refer to the attached figure in the instruction manual Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The steel cage structure 1 includes a steel cage body 12, on top of which is mounted an upper precast concrete block 11. The upper precast concrete block 11 includes a first precast concrete ring plate 111. The first precast concrete ring plate 111 is mounted on top of the steel cage body 12. A first concrete guide block 112 is fixedly connected to the edge of the first precast concrete ring plate 111. A reserved hole 113 is formed inside the first precast concrete ring plate 111. The provision of the first concrete guide block 112 facilitates the smooth installation of the steel cage structure 1 in the center of the steel pipe pile 2 during hoisting.

[0050] Please refer to the attached figure in the instruction manual Figure 1 、 Figure 9 and Figure 10 The steel cage body 12 includes a main reinforcement 121, with several stirrups 122 arranged on the outside of the main reinforcement 121. The top of the main reinforcement 121 passes through the reserved hole 113. An upper nut 123 and a lower nut 124 are respectively provided between the main reinforcement 121 and the first precast concrete ring plate 111. The upper nut 123 is located at the top of the first precast concrete ring plate 111, and the lower nut 124 is located at the bottom of the first precast concrete ring plate 111. The bottom of the main reinforcement 121 is connected to the top of the annular steel plate 13. In this way, the first precast concrete ring plate 111 can be installed on the top of the main reinforcement 121 through the mutual cooperation of the upper nut 123 and the lower nut 124.

[0051] Please refer to the attached figure in the instruction manual Figure 1 、 Figure 2 、 Figure 3 ,and Figure 4The top of the upper precast concrete block 11 is provided with a lifting lug 15. The lifting lug 15 includes an embedded steel plate 154 embedded in the interior of the first precast concrete ring plate 111. The top of the embedded steel plate 154 is connected to the main steel plate 151. The upper ends of both sides of the main steel plate 151 are connected to load-bearing circular tubes 152. The ends of the load-bearing circular tubes 152 facing away from the main steel plate 151 are connected to an annular sealing plate 153. The outer side of the load-bearing circular tube 152 is wrapped with a lifting rope 6. The lifting rope 6 is conveniently installed on the load-bearing circular tube 152 of the lifting lug 15, thereby enabling the lifting of the steel cage structure 1.

[0052] Please refer to the attached figure in the instruction manual Figure 1 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 An annular steel plate 13 is installed at the bottom of the steel cage body 12. A lower precast concrete block 14 is provided at the bottom of the annular steel plate 13. The lower precast concrete block 14 includes a second precast concrete annular plate 141. The second precast concrete annular plate 141 is provided at the bottom of the annular steel plate 13. A second guide block 142 is fixedly connected to the edge of the second precast concrete annular plate 141. A precast concrete flange 143 is provided on the inner side of the second precast concrete annular plate 141. Precast concrete legs 144 are connected to the bottom of the second precast concrete annular plate 141. Embedded steel bars 145 are embedded in the precast concrete flange 143, and the top of the embedded steel bars 145 abuts against the top of the annular steel plate 13. The annular steel plate 13 and the second precast concrete annular plate 141 are fixedly connected by the embedded steel bars 145, and the precast concrete legs 144 ensure that there is a sufficient concrete protective layer at the bottom of the steel cage structure 1.

[0053] Please refer to the attached figure in the instruction manual Figure 2-9 Fixing clips 16 are pre-embedded on both the inner and outer sides of the first and second precast concrete ring plates 111, 141. The cross-section of the fixing clips 16 is a two-thirds circular ring. The fixing clips 16 ensure that the grouting pipe 5 is installed along with the steel cage structure 1 to the bottom of the steel pipe pile 2 during hoisting. During grouting, the grouting pipe 5 is pulled firmly to remove it from the opening of the fixing clips 16.

[0054] The core column rock-embedded pile structure introduced in this embodiment can be used not only for offshore photovoltaics, but also for offshore wind turbine foundations and offshore booster stations in shallow overburden sea areas.

[0055] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A core column rock-embedded pile structure, comprising a steel cage structure (1), a steel pipe pile (2) and a rock mass (4), characterized in that: The bottom of the steel pipe pile (2) is embedded in the rock mass (4); the steel cage structure (1) is placed inside the steel pipe pile (2) and the rock mass (4); a grouting pipe (5) is provided between the steel cage structure (1), the steel pipe pile (2) and the rock mass (4); and the gaps between the steel cage structure (1), the steel pipe pile (2) and the rock mass (4) are filled with grouting material (3) through the grouting pipe (5); The steel cage structure (1) comprises a steel cage body (12), an upper precast concrete block (11) is installed on the top of the steel cage body (12), a lifting lug (15) is provided on the top of the upper precast concrete block (11), an annular steel plate (13) is installed on the bottom of the steel cage body (12), and a lower precast concrete block (14) is provided on the bottom of the annular steel plate (13).

2. The core column rock-socketed pile structure according to claim 1, characterized in that: The upper precast concrete block (11) comprises a first precast concrete ring plate (111), the first precast concrete ring plate (111) being mounted on the top of the steel cage body (12), a first concrete guide block (112) being connected to the edge of the first precast concrete ring plate (111), and a reserved hole (113) being provided inside the first precast concrete ring plate (111).

3. The core column rock-socketed pile structure according to claim 2, characterized in that: The steel cage body (12) includes a main reinforcement (121), a plurality of stirrups (122) are arranged on the outside of the main reinforcement (121), the top of the main reinforcement (121) passes through the reserved hole (113), an upper nut (123) and a lower nut (124) are respectively arranged between the main reinforcement (121) and the first precast concrete ring plate (111), the upper nut (123) is located at the top of the first precast concrete ring plate (111), and the lower nut (124) is located at the bottom of the first precast concrete ring plate (111), and the bottom of the main reinforcement (121) is connected to the top of the annular steel plate (13).

4. The core column rock-socketed pile structure according to claim 2, characterized in that: The lower precast concrete block (14) comprises a second precast concrete ring plate (141), the second precast concrete ring plate (141) is arranged at the bottom of the annular steel plate (13), a second guide block (142) is connected to the edge of the second precast concrete ring plate (141), a precast concrete flange (143) is arranged on the inner side of the second precast concrete ring plate (141), a precast concrete leg (144) is connected to the bottom of the second precast concrete ring plate (141), and embedded steel bars (145) are embedded inside the precast concrete flange (143), and the top of the embedded steel bars (145) abuts against the top of the annular steel plate (13).

5. The core column rock-socketed pile structure according to claim 4, characterized in that: Fixing clips (16) are pre-buried on both the inner and outer sides of the first precast concrete ring plate (111) and the second precast concrete ring plate (141), and the cross section of the fixing clips (16) is a two-thirds circular ring.

6. The core column rock-socketed pile structure according to claim 2, characterized in that: The lifting lug (15) includes a pre-embedded steel plate (154), which is pre-embedded in the interior of the first precast concrete ring plate (111). The top of the pre-embedded steel plate (154) is connected to the main steel plate (151). The upper ends of both sides of the main steel plate (151) are connected to load-bearing circular tubes (152). The end of the load-bearing circular tube (152) facing away from the main steel plate (151) is connected to an annular sealing plate (153). A lifting rope (6) is wound around the outer side of the load-bearing circular tube (152).

7. The core column rock-socketed pile structure according to claim 1, characterized in that: The steel pipe pile (2) comprises a steel pipe section (21), a steel pipe cone section (22) is provided at the bottom of the steel pipe section (21), and ribs (23) are provided between the bottom of the steel pipe section (21) and the steel pipe cone section (22).

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