Two-pile anchoring foundation structure with base plate

Abstract

The invention relates to the technical field of anchoring foundations, in particular to a two-pile anchoring foundation structure with a base disc, the structure comprises anchor piles and the base disc, and the base disc is composed of a sleeve, a bottom supporting frame, an anti-sinking plate and the like; the bottom supporting frame is arranged between the two sleeves, the two sleeves are connected together, the anti-settling plate set is fixedly arranged at the bottom of the bottom supporting frame, and the contact area between the bottom supporting frame and the mud surface is increased; the anchor pile and the base plate are connected through grouting, and the upper load is transmitted to the anchor pile; in the installation period, the base disc can play a role of a pile supporting support, the stability of the anchor pile in the installation period is guaranteed, the pile supporting support does not need to be additionally arranged, the construction progress is accelerated, and meanwhile the installation cost is reduced. According to the two-pile anchoring foundation structure with the base plate, a plurality of mooring anchor points can be provided at the same time, and the mooring anchor points can be arranged to be of a connected structure, so that relative position errors caused by construction and installation are avoided; ballasts can be arranged on the framework at the bottom of the base disc, so that the stability of the foundation during installation can be improved, and the uplift force can be resisted; by adopting the foundation type, the construction efficiency is improved, and the installation cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of anchoring foundations, in particular to an anchoring foundation structure with two piles and base plates. Background Art

[0002] Under the background of my country's energy development, the scope of marine resource exploitation is expanding, and offshore wind power is developing by leaps and bounds. Offshore wind power refers to the construction of wind power generation facilities at sea, which uses offshore wind energy resources to generate electricity. The wind speed at sea is usually higher than that on land, the wind direction is more stable, and the power generation efficiency is higher; the construction of offshore wind farms will not occupy precious land resources, which is especially important for coastal areas with dense populations or tight land resources; the construction of offshore wind farms can directly provide electricity to coastal cities, reducing the loss during power transmission. The main components of an offshore wind power system include offshore wind turbines, power collection cables, offshore booster substations, high-voltage transmission cables and onshore centralized control centers. Offshore wind turbines are responsible for capturing wind energy and converting it into electrical energy; power collection cables are used to collect electricity generated by each wind turbine and transmit the electricity to the offshore booster substation; the offshore booster substation boosts the low-voltage electricity generated by the wind turbine to high voltage so that it can be transmitted to land via high-voltage transmission cables; the high-voltage transmission cables transmit the boosted electricity from the offshore booster substation to the land power grid; the onshore centralized control center is responsible for monitoring and controlling the operating status of the entire wind farm to ensure the safe and stable operation of the power system.

[0003] Offshore wind turbine foundations can be roughly divided into two categories: fixed foundations and floating foundations. It is difficult to find the optimal combination between mooring cables and anchor foundations for floating foundations. The reduction in mooring costs often leads to an increase in anchor foundation costs. The commonly used method is to reduce the cost of the entire mooring system by reducing the design, construction and installation costs of the anchor foundation.

[0004] The main anchor foundation types include anchor piles, suction anchors, gravity anchors and other foundation types. Among them, the installation cost of anchor pile foundation is relatively high. When using anchor pile foundation, how to reduce the installation cost of anchor pile foundation is the most significant cost control measure. Summary of the invention

[0005] The main purpose of the present invention is to provide a two-pile anchor foundation structure with a base plate to solve the problem of high installation cost of the anchor foundation proposed in the related art.

[0006] In order to achieve the above object, according to one aspect of the present invention, there is provided a two-pile anchoring foundation structure with a base plate, comprising: a sleeve portion, wherein the sleeve portion comprises two sleeves;

[0007] A bottom support frame, the bottom support frame is arranged between the two sleeves to connect the two sleeves;

[0008] An anti-sinking plate group, which is fixed at the bottom of the bottom support frame to increase the contact area between the bottom support frame and the mud surface;

[0009] A diagonal brace group, one end of which is fixedly connected to the sleeve and the other end of which is fixedly connected to the bottom support frame, for increasing the connection points between the sleeve and the bottom support frame;

[0010] Anchor piles, which are inserted from the inside of the sleeve below the mud surface to a designed depth, and the gap between the anchor piles and the sleeve is groutingly connected;

[0011] An anchor point group, the anchor point group is arranged above the bottom support frame, the anchor point group includes a plurality of lifting eyes and a plurality of anchor points, the anchor points transfer the upper mooring load to the foundation, one foundation can become a shared anchor point for multiple mooring cables, and the lifting eyes are used for lifting operations.

[0012] Furthermore, the sleeve portion also includes two guide plates, which are respectively fixed on the top of the sleeve to provide guidance for the anchor pile group to be inserted into the sleeve.

[0013] Furthermore, the diagonal brace group includes a plurality of diagonal braces a and a plurality of diagonal braces b, the tops of the diagonal braces a are fixedly connected to the inner side of the sleeve, and the tops of the diagonal braces b are fixedly connected to the front and rear sides of the sleeve.

[0014] Furthermore, the bottom support frame includes a connecting beam, several main beams and several secondary beams, one end of the connecting beam is fixedly connected to the inner side of the left end sleeve, and the other end is fixedly connected to the inner side of the right end sleeve, and the bottom ends of the diagonal braces a are fixedly connected to the connecting beam.

[0015] Furthermore, the orthographic projection of the combination of several main beams forms an "X" shape, one end of each main beam is fixedly connected to the middle of the connecting beam, and the other end is fixedly connected to the bottom end of the diagonal brace b.

[0016] Furthermore, the bottoms of the connecting beam, the plurality of main beams and the plurality of secondary beams are flush.

[0017] Furthermore, the anti-sinking plate group includes an anti-sinking plate and a ballast. The anti-sinking plate is fixed at the bottom of the bottom supporting frame and is divided into a number of small units. The ballast is placed in the small units. An air hole is provided on the top of the anti-sinking plate. The top of the anti-sinking plate is flush with the bottom of the connecting beam, several main beams and several secondary beams.

[0018] Furthermore, the anchor points are all fixedly arranged in the middle part above the connecting beam, and a plurality of the anchor points can be connected into a whole.

[0019] Furthermore, the lifting ears are all fixedly arranged at the middle part of the outer side of the diagonal brace b.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the anchor pile and the base plate are connected by grouting to transfer the upper load to the anchor pile; during installation, the base plate can play the role of a pile support bracket to ensure the stability of the anchor pile during installation, without the need for additional pile support brackets, which speeds up the construction progress and reduces the installation cost. The two-pile base plate anchor foundation structure can provide multiple mooring anchor points at the same time, and multiple mooring anchor points can be set as a connected structure to avoid relative position errors caused by construction and installation; ballast can be loaded on the bottom frame of the base plate, which can increase the foundation stability during installation and resist the upward pull; the use of this foundation type improves construction efficiency and reduces installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The cross section of the base plate of the present invention is Figure 1 ;

[0022] Figure 2 The cross section of the base plate of the present invention is Figure 2 ;

[0023] Figure 3 It is a front view of the anchor pile of the present invention;

[0024] Figure 4 A top view of the present invention;

[0025] Figure 5 It is a connection schematic diagram of the anti-sinking plate of the present invention;

[0026] Figure 6 It is a front view of the present invention in the state of installation completion.

[0027] Illustration Description:

[0028] 1. Sleeve; 2. Connecting beam; 3. Main beam; 4. Secondary beam; 5. Anti-sinking plate; 6. Diagonal brace a; 7. Diagonal brace b; 8. Anchor point; 9. Shear key; 10. Guide plate; 11. Anchor pile; 12. Lifting lug; 13. Ballast; 14. Cement slurry. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0030] See also Figures 1 to 6The present embodiment provides a two-pile anchor foundation structure with a base plate, comprising: a sleeve portion, the sleeve portion comprising two sleeves 1, the height of the sleeve 1 is set based on the actual engineering grouting connection strength requirements to ensure that the grouting strength can transfer the mooring load on the base plate to the anchor pile, the inner diameter of the sleeve 1 is larger than the outer diameter of the anchor pile 11, so that the anchor pile 11 is easily inserted into the sleeve 1, and after the anchor pile 11 is driven into the mud to the designed depth, the distance above the top of the sleeve 1 is set based on the length of the pile hammer sleeve inserted into the anchor pile 11;

[0031] A bottom support frame, which is disposed between the two sleeves 1 to connect the two sleeves 1;

[0032] The anti-sinking plate group is fixed at the bottom of the bottom support frame to increase the contact area between the bottom support frame and the mud surface;

[0033] A diagonal brace group, one end of which is fixedly connected to the sleeve 1, and the other end of which is fixedly connected to the bottom support frame, for increasing the connection points between the sleeve 1 and the bottom support frame;

[0034] Anchor piles are inserted from the inside of sleeve 1 below the mud surface to the designed depth, and the gap between the anchor piles and the sleeve is grouting connected;

[0035] Anchor point group, the anchor point group is arranged above the bottom support frame, the anchor point group includes a plurality of lifting eyes 12 and a plurality of anchor points 8, the anchor points 8 transfer the upper mooring load to the foundation, and one foundation can become a shared anchor point 8 for multiple mooring cables. The lifting eyes 12 are used for lifting and leveling, specifically for lifting during installation, and for leveling the base plate after the pile hammer drives the anchor pile 11 to a preset depth. The number of lifting eyes 12 can be set to two or four or other numbers, and the specific number of lifting eyes 12 can be set according to the actual lifting equipment used.

[0036] The sleeve part also includes two guide plates 10, which are respectively fixed on the top of the sleeve 1 to provide guidance for the anchor pile group to be inserted into the sleeve 1, so that the anchor piles can be smoothly inserted into the sleeve.

[0037] The diagonal brace group includes a plurality of diagonal braces a6 and a plurality of diagonal braces b7. In this embodiment, two diagonal braces a6 and four diagonal braces b7 are preferably used. The diagonal brace a6 pulls the sleeve 1 toward the connecting beam 2 to enhance the integrity of the connecting beam 2 and the sleeve 1. The four diagonal braces b7 are respectively arranged on both sides of the two sleeves 1 to pull the sleeve 1 in opposite directions, so as to increase the structural integrity of the sleeve (1) and the bottom support frame. The tops of the diagonal braces a6 are fixedly connected to the inner side of the sleeve 1, and the tops of the diagonal braces b7 are fixedly connected to the front and rear sides of the sleeve 1. The upper ends of the diagonal braces a6 are welded to the sleeve 1, and the lower ends are welded to the connecting beam 2, and the welding positions avoid the anchor points 8.

[0038] The bottom support frame includes a connecting beam 2, several main beams 3 and several secondary beams 4. One end of the connecting beam 2 is fixedly connected to the inner side of the left end sleeve 1, and the other end is fixedly connected to the inner side of the right end sleeve 1. The bottom ends of the diagonal braces a6 are fixedly connected to the connecting beam 2. In this example, the main beam 3 is a steel pipe structure, and the secondary beam 4 is a steel pipe and H-shaped steel.

[0039] The combined orthographic projection of several main beams 3 forms an "X" shape. One end of the main beam 3 is fixedly connected to the middle of the connecting beam 2, and the other end is fixedly connected to the bottom end of the diagonal brace b7 to form a stable bottom support frame. An anti-sinking plate 5 is arranged at the bottom of the bottom support frame to form a base.

[0040] The bottoms of the connecting beam 2, the plurality of main beams 3 and the plurality of secondary beams 4 are flush.

[0041] The anti-sinking plate group includes an anti-sinking plate 5 and a ballast 13. The anti-sinking plate 5 is fixed at the bottom of the bottom supporting frame and is divided into a number of small units. The ballast 13 is placed in the small units to increase the stability of the base and the pull-out bearing capacity of the foundation. An air hole is provided on the top of the anti-sinking plate 5. The top of the anti-sinking plate 5 is flush with the bottom of the connecting beam 2, several main beams 3 and several secondary beams 4. Whether the ballast 13 is loaded on the top of the anti-sinking plate is set according to the actual engineering conditions. The ballast 13 can be sand, cement, rock or iron ore, or it can be cement slurry 14. During installation, the anti-sinking plate 5 is placed on the mud surface to prevent the foundation from sinking, sliding and overturning.

[0042] The anchor points 8 are all fixedly arranged in the middle part above the connecting beam 2. Several anchor points 8 can be connected into a whole. The middle part of the connecting beam 2 is welded to the anchor points 8. The number of mooring points is set according to the mooring requirements. The anchor points 8 are connected to the mooring system to transfer the upper load to the base plate. The position setting of the anchor points 8 requires interference verification. In this embodiment, three anchor points 8 are preferably selected to provide three mooring points at the same time.

[0043] The lifting ears 12 are all fixedly arranged at the middle part of the outer side of the diagonal brace b7.

[0044] The hoisting base plate is lowered to the designated position; the anchor pile 11 is inserted into the sleeve 1, the pile hammer is inserted into the top of the anchor pile 11, and the anchor pile 11 is driven into the designed mud depth, and the pile hammer is recovered; the above steps are repeated to drive another anchor pile 11 into the designed mud depth; the foundation is leveled, and cement slurry 14 is poured into the gap between the sleeve 1 and the anchor pile 11 to enhance the integrity of the two. The two-pile base plate anchor foundation structure provided by the present invention can provide multiple mooring anchor points, and the multiple mooring anchor points can be set as a connected structure to avoid relative position errors caused by installation; the base plate can be used as a pile stabilizing bracket, and ballast can be loaded on the bottom frame of the base plate, which can not only increase the foundation stability during installation, but also resist the upward pull force; it improves construction efficiency and reduces installation costs.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A two-pile anchor foundation structure with a base plate, characterized in that: include: A sleeve portion, the sleeve portion comprising two sleeves (1); A bottom support frame, the bottom support frame is arranged between the two sleeves (1) and connects the two sleeves (1); An anti-sinking plate group, which is fixed at the bottom of the bottom support frame to increase the contact area between the bottom support frame and the mud surface; A diagonal brace group, one end of which is fixedly connected to the sleeve (1) and the other end of which is fixedly connected to the bottom support frame, and is used to increase the connection points between the sleeve (1) and the bottom support frame; Anchor piles, which are inserted from the inside of the sleeve 1 below the mud surface to a designed depth, and the gap between the anchor piles and the sleeve is groutingly connected; An anchor point group is arranged above the bottom support frame, and comprises a plurality of lifting eyes (12) and a plurality of anchor points (8). The anchor points (8) transfer the upper mooring load to the foundation. One foundation can become a shared anchor point (8) for a plurality of mooring cables. The lifting eyes (12) are used for lifting operations.

2. A two-pile anchoring foundation structure with base plate according to claim 1, characterized in that: The sleeve portion further comprises two guide plates (10), which are respectively fixed on the top of the sleeve (1) to provide guidance for the anchor pile group to be inserted into the sleeve (1).

3. A two-pile anchoring foundation structure with base plate according to claim 1, characterized in that: The diagonal brace group comprises a plurality of diagonal braces a (6) and a plurality of diagonal braces b (7). The tops of the diagonal braces a (6) are fixedly connected to the inner side of the sleeve (1), and the tops of the diagonal braces b (7) are fixedly connected to the front and rear sides of the sleeve (1).

4. A two-pile anchoring foundation structure with base plate according to claim 1, characterized in that: The bottom support frame comprises a connecting beam (2), a plurality of main beams (3) and a plurality of secondary beams (4); one end of the connecting beam (2) is fixedly connected to the inner side of the left end sleeve (1), and the other end is fixedly connected to the inner side of the right end sleeve (1); the bottom ends of the diagonal braces a (6) are fixedly connected to the connecting beam (2).

5. A two-pile anchoring foundation structure with base plate according to claim 4, characterized in that: The combined orthographic projection of a plurality of main beams (3) forms an "X" shape, one end of each main beam (3) is fixedly connected to the middle of the connecting beam (2), and the other end is fixedly connected to the bottom end of the diagonal brace b (7).

6. A two-pile anchoring foundation structure with base plate according to claim 5, characterized in that: The bottoms of the connecting beam (2), the plurality of main beams (3) and the plurality of secondary beams (4) are flush.

7. A two-pile anchoring foundation structure with base plate according to claims 1 and 4, characterized in that: The anti-sinking plate group comprises an anti-sinking plate (5) and a ballast (13); the anti-sinking plate (5) is fixedly arranged at the bottom of the bottom support frame and is divided into a plurality of small units; the ballast (13) is placed in each of the small units; a vent hole is arranged at the top of the anti-sinking plate (5); the top of the anti-sinking plate (5) is flush with the bottom of the connecting beam (2), the plurality of main beams (3) and the plurality of secondary beams (4).

8. The two-pile anchor foundation structure with base plate according to claim 4, characterized in that: The anchor points (8) are all fixedly arranged in the middle of the upper part of the connecting beam (2), and a plurality of the anchor points (8) can be connected to form a whole.

9. The two-pile anchoring foundation structure with base plate according to claim 3, characterized in that: The lifting ears (12) are all fixedly arranged at the middle part of the outer side of the diagonal brace b (7).

Images