A torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity and a working method

Abstract

The present invention provides a device and working method for reinforcing and grouting a torpedo anchor to enhance its pull-out bearing capacity. The device mainly includes a torpedo anchor, an anchor head, a tail wing, a cavity, an anchor chain, a support block, a guide tube, a pin and concrete. By pouring cheap and large-volume concrete into the torpedo anchor to enhance its own weight, the effect of increasing the initial penetration depth of the torpedo anchor is achieved; after penetration, the piston in the expanded anchor head branch is driven by the weight of the large-volume concrete to insert the inserted bars outward into the soil layer, and grouting is performed around the inserted bars to form a reinforced grouting reinforced structure with multiple inserted bars as the center, which greatly enhances the pull-out bearing capacity of the torpedo anchor. The method can fully convert the dead weight of the torpedo anchor into a reinforced grouting reinforced structure that is more conducive to enhancing the pull-out bearing capacity of the torpedo anchor, achieving the dual effects of effectively increasing the initial penetration depth of the torpedo anchor and greatly improving the pull-out bearing capacity of the torpedo anchor. The device has good automation effect, does not require additional power, and has small construction disturbance.

Description

Technical Field

[0001] The invention belongs to the technical field of mooring foundation devices, and in particular relates to a torpedo anchor reinforcement grouting enhancement anti-pulling bearing capacity device and a working method. Background Art

[0002] my country's exploration of marine resources is moving towards the deep sea, which places high demands on offshore oil platforms and platform anchor foundations. At present, the most widely used deep-water anchor foundations are suction anchors, normal bearing anchors, suction penetration plate anchors, vibration deep buried anchors, and dynamic penetration anchors. Among them, the torpedo anchor is the latest development of deep-sea anchor foundations, with outstanding features such as economical cost, simple and efficient installation, and good anchoring performance. In particular, it overcomes the disadvantage that the installation cost of traditional anchor foundations is heavily dependent on water depth, and is currently the deep-water anchor foundation with the most development prospects. The current problem is that increasing the penetration depth of the torpedo anchor by increasing its own weight requires a large amount of steel, which is costly; when the torpedo anchor is lightweight, the initial penetration depth is often insufficient; it is impossible to improve the anchoring effect between the torpedo anchor and the formation by reinforcement, which is not conducive to the torpedo anchor's pull-out bearing capacity. There is still a lot of room for improvement in the pull-out performance of the existing torpedo anchor.

[0003] The search found that the patent application number: CN202122683123.8 "Gravity Penetration Deep Water Anchor" provides a solution for installing the anchor body into the soil, embedding the support plate into the soil, and forming an anchor body inverted in the soil. This torpedo anchor cannot use its own weight to increase the initial grouting depth, cannot reinforce and grout the soil layer, and requires additional power to drag the support plate in the soil and later grouting, and the automation effect is low; due to the limitations of the grouting structure, the cost of its grouting materials is high, and it is difficult to use cheap concrete for grouting. The application number is 201610533751.9 "A Ringed Torpedo Anchor", which increases the bearing capacity of the torpedo anchor by setting a puncture mechanism inside the cavity and puncturing into a plane under the action of tension. However, this solution only expands the bayonets outward, and the improvement in bearing capacity is restricted by the number and size of the bayonets. It is impossible to form a reinforced grouting reinforcement structure centered on multiple inserted bars, and there is still much room for improving the bearing capacity of the torpedo anchor. In addition, it is also impossible to use the self-weight of cheap large-volume concrete to increase the initial penetration depth of the torpedo anchor.

[0004] Therefore, the existing technology cannot use cheap large-volume concrete to increase its own weight, resulting in insufficient initial penetration depth of the torpedo anchor; and it is unable to automatically drive the automation of the entire reinforcement and grouting process by converting its own gravitational potential energy into kinetic energy; due to the limitation on the number of puncture mechanisms, the number and range of reinforcement are greatly restricted, and there is still much room for improvement in enhancing the pull-out bearing capacity of the torpedo anchor. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies and defects of the prior art, and to provide a device and working method for reinforcing and grouting a torpedo anchor to enhance its pull-out bearing capacity. The device increases the initial penetration depth of the torpedo anchor by pouring cheap, large-volume concrete into the torpedo anchor to enhance its own weight. After penetration, the piston in the expanded anchor head branch is driven by the weight of the large-volume concrete to insert the inserted bars outward into the soil layer, and grouting is performed around the inserted bars to form a reinforced grouting reinforced structure centered on a plurality of inserted bars, which greatly enhances the pull-out bearing capacity of the torpedo anchor. The method can fully convert the dead weight of the torpedo anchor into a reinforced grouting reinforced structure that is more conducive to enhancing the pull-out bearing capacity of the torpedo anchor, achieving the dual effects of effectively increasing the initial penetration depth of the torpedo anchor and greatly improving the pull-out bearing capacity of the torpedo anchor. The device has good automation effect, does not require additional power, and has small construction disturbance.

[0006] A torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity, comprising a torpedo anchor 1, an anchor head 2, a tail fin 3, a cavity 4, an anchor chain 5, a support block 6, a guide tube 9, a pin 18 and concrete 20;

[0007] The torpedo anchor 1 is a cylindrical body with a conical anchor head 2 at the front end, four tail fins 3 arranged around the tail, and the center point of the tail end is connected to the anchor chain 5;

[0008] The cavity 4 is connected to the inner wall of the torpedo anchor 1 through the surrounding support blocks 6; an injection port 7 is connected to the top of the cavity and the tail end of the torpedo anchor, which is used to inject concrete into the cavity; an exhaust port 8 is provided at the top of the cavity 4, which is connected to the external air or seawater, and is used to discharge the cavity gas or seawater when the concrete 20 is injected into the cavity, and to introduce gas or seawater into the cavity when the concrete in the cavity is poured into the anchor head 2; an extendable and retractable film 23 is provided on the upper layer of the cavity, which is used to shield seawater from intruding into the concrete 20, and the film shrinks upward when the concrete is injected into the cavity, and the film stretches when the concrete is discharged downward;

[0009] The lower end of the cavity 4 is connected to a conduit 9, and concrete 20 can flow downward from the cavity into the conduit; the conduit 9 is located at the axis of the torpedo anchor 1, and four valves 10 with a timed opening function are arranged inside the conduit, and the valves 10 are connected to a hose 11; when the valves 10 are opened, the concrete 20 is pressed into the four branches of the anchor head 2 along the hose 11 under the action of its own weight;

[0010] The anchor head 2 is composed of four branches with independent closed spaces, each of which can be independently expanded outward around the connection between the anchor head and the guide tube 9; each branch of the anchor head 2 is provided with a connecting rod 12, a piston 13, a dowel 14, a sliding rod 15, a spring 16, a slot 17, a grouting port 19, an inner frame 21 and an outer frame 22;

[0011] The multiple connecting rods 12 are connected to the inner frame 21 at multiple points to support the stability of the internal structure; the sliding rod 15 passes through the central hole of the outer frame 22 to restrict the expansion direction of the branches of the anchor head 2; the spring 16 is sleeved on the sliding rod 15, and when the branches of the anchor head are not expanded, they are in a compressed state under the pressure of the outer frame 22. When the pin 18 is pulled out of the slot 17, the spring 16 pushes the outer frame 22 outward to make the branches of the anchor head expand outward;

[0012] The piston 13 is connected to the dowel 14, and the dowel can be inserted outward into the soil layer under the driving force of concrete extrusion; when the piston 13 is pushed to the end, the poured concrete 20 can flow out from the exposed grouting port 19 and continue to flow along the dowel 14 to form a concrete inclusion body centered on the dowel; the outer frame 22 is provided with a plurality of dowel 14 insertion holes, which are arranged in a radial shape, allowing a plurality of dowels 14 to pass through and be inserted into the soil layer to form a spatial reinforced structure;

[0013] The pin 18 is connected to the inner wall of the torpedo anchor 1 through a connecting piece and has a timed opening function;

[0014] A working method of a torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity, using the connection of the torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity, the specific steps are as follows:

[0015] ① The torpedo anchor 1 is transported to the target drop position by a construction ship, the mixed concrete 20 is poured into the cavity 4 of the torpedo anchor, and the torpedo anchor is released to allow it to sink freely and penetrate into the seabed until it is stable;

[0016] ② After the whole device is stable, according to the preset time, the pin 18 is automatically loosened and the valve 10 is automatically opened, and the branches of the anchor head 2 are expanded outward under the action of the spring 16. At this time, the concrete 20 in the cavity 4 is pressed into the inner space of the anchor head 2 along the guide tube 9 and the hose 11;

[0017] ③ As the concrete slurry is continuously pressed in, the piston 13 is pushed outward, and the inserted rebar 14 is inserted outward into the soil layer; when the piston 13 is pushed to the end, the poured concrete 20 can flow out from the grouting port 19 and continue to flow along the inserted rebar 14, forming a concrete inclusion body centered on the inserted rebar, that is, a reinforced grouting enhanced structure.

[0018] Furthermore, by pouring cheap large-volume concrete into the torpedo anchor to increase its own weight, the effect of increasing the initial penetration depth of the torpedo anchor is achieved; through the weight of the large-volume concrete, the piston in the expanded anchor head branch is driven to insert the inserted bars outward into the soil layer, and grouting is performed around the inserted bars to form a reinforced grouting reinforcement structure centered on multiple inserted bars, which greatly enhances the pull-out bearing capacity of the torpedo anchor.

[0019] Beneficial Effects

[0020] The present invention provides a device and working method for reinforcing and grouting a torpedo anchor to enhance its pull-out bearing capacity. The device mainly comprises a torpedo anchor, an anchor head, a tail fin, a cavity, an anchor chain, a support block, a guide tube, a pin and concrete. The device firstly increases the self-weight by pouring cheap and large-volume concrete into the torpedo anchor, thereby increasing the initial penetration depth of the torpedo anchor. After penetration, the piston in the expanded anchor head branch is driven by the weight of the large-volume concrete to insert the inserted bars outward into the soil layer, and grouting is performed around the inserted bars to form a reinforced grouting enhanced structure with multiple inserted bars as the center, thereby greatly enhancing the pull-out bearing capacity of the torpedo anchor.

[0021] The advantages of the present invention are as follows:

[0022] ① A large amount of cheap concrete is poured into the cavity inside the torpedo anchor to increase its deadweight, which can effectively increase the initial penetration depth of the torpedo anchor.

[0023] ② Through the weight of large-volume concrete, the piston in the expanded anchor head branch is driven to insert the inserted rebar outward into the soil layer, and grouting is performed around the inserted rebar to form a reinforced grouting enhanced structure centered on multiple inserted rebars, which greatly enhances the pull-out bearing capacity of the torpedo anchor.

[0024] ③This method can fully convert the deadweight of the torpedo anchor into a reinforced grouting reinforced structure that is more conducive to enhancing the pull-out bearing capacity of the torpedo anchor, achieving the dual effects of effectively increasing the initial penetration depth of the torpedo anchor while greatly improving the pull-out bearing capacity of the torpedo anchor.

[0025] ④ The formation process of the reinforced grouting structure of the device is realized automatically without adding additional power. It has good automation effect and is easy to install. It has less disturbance to the soil layer than other methods of strengthening torpedo anchors. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the device of the present invention when the anchor head is not unfolded;

[0027] Figure 2 It is a schematic diagram of the structure of the device of the present invention after the anchor head is unfolded;

[0028] Figure 3 It is a schematic diagram of the structure of the slurry entering the anchor head branch after the anchor head is unfolded according to the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the inserted reinforcement of the present invention being inserted into the soil layer to form a concrete inclusion body;

[0030] Figure 5 It is a schematic diagram of the arrangement of the reinforcing bar holes on the outer frame curved surface of one branch of the anchor head described in the present invention.

[0031] Explanation of reference numerals: torpedo anchor 1, anchor head 2, tail fin 3, cavity 4, anchor chain 5, support block 6, injection port 7, exhaust port 8, conduit 9, valve 10, hose 11, connecting rod 12, piston 13, dowel 14, slide rod 15, spring 16, slot 17, pin 18, grouting port 19, inner frame 21, outer frame 22 and concrete 20. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 to Figure 4 As shown, a torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity includes a torpedo anchor 1, an anchor head 2, a tail fin 3, a cavity 4, an anchor chain 5, a support block 6, a guide tube 9, a pin 18 and concrete 20;

[0034] The torpedo anchor 1 is a cylindrical body with a conical anchor head 2 at the front end, four tail fins 3 arranged around the tail, and the center point of the tail end is connected to the anchor chain 5;

[0035] The cavity 4 is connected to the inner wall of the torpedo anchor 1 through the surrounding support blocks 6; an injection port 7 is connected to the top of the cavity and the tail end of the torpedo anchor, which is used to inject concrete into the cavity; an exhaust port 8 is provided at the top of the cavity 4, which is connected to the external air or seawater, and is used to discharge the cavity gas or seawater when the concrete 20 is injected into the cavity, and to introduce gas or seawater into the cavity when the concrete in the cavity is poured into the anchor head 2; an extendable and retractable film 23 is provided on the upper layer of the cavity, which is used to shield seawater from intruding into the concrete 20, and the film shrinks upward when the concrete is injected into the cavity, and the film stretches when the concrete is discharged downward;

[0036] The lower end of the cavity 4 is connected to a conduit 9, and concrete 20 can flow downward from the cavity into the conduit; the conduit 9 is located at the axis of the torpedo anchor 1, and four valves 10 with a timed opening function are arranged inside the conduit, and the valves 10 are connected to a hose 11; when the valves 10 are opened, the concrete 20 is pressed into the four branches of the anchor head 2 along the hose 11 under the action of its own weight;

[0037] The anchor head 2 is composed of four branches with independent closed spaces, each of which can be independently expanded outward around the connection between the anchor head and the guide tube 9; each branch of the anchor head 2 is provided with a connecting rod 12, a piston 13, a dowel 14, a sliding rod 15, a spring 16, a slot 17, a grouting port 19, an inner frame 21 and an outer frame 22;

[0038] The multiple connecting rods 12 are connected to the inner frame 21 at multiple points to support the stability of the internal structure; the sliding rod 15 passes through the central hole of the outer frame 22 to restrict the expansion direction of the branches of the anchor head 2; the spring 16 is sleeved on the sliding rod 15, and when the branches of the anchor head are not expanded, they are in a compressed state under the pressure of the outer frame 22. When the pin 18 is pulled out of the slot 17, the spring 16 pushes the outer frame 22 outward to make the branches of the anchor head expand outward;

[0039] The piston 13 is connected to the dowel 14, and the dowel 14 can be inserted into the soil layer outward under the driving force of concrete extrusion; when the piston 13 is pushed to the end, the poured concrete 20 can flow out from the exposed grouting port 19 and continue to flow along the dowel 14 to form a concrete inclusion body centered on the dowel; the outer frame 22 is provided with a plurality of dowel 14 insertion holes, which are arranged in a radial shape, allowing a plurality of dowels 14 to pass through and be inserted into the soil layer to form a spatial reinforced structure, such as Figure 5 As shown;

[0040] The pin 18 is connected to the inner wall of the torpedo anchor 1 through a connecting piece and has a timed opening function;

[0041] A working method of a torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity, using the connection of the torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity, the specific steps are as follows:

[0042] ① The torpedo anchor 1 is transported to the target drop position by a construction ship, the mixed concrete 20 is poured into the cavity 4 of the torpedo anchor, and the torpedo anchor is released to allow it to sink freely and penetrate into the seabed until it is stable;

[0043] ② After the whole device is stable, according to the preset time, the pin 18 is automatically loosened and the valve 10 is automatically opened, and the branches of the anchor head 2 are expanded outward under the action of the spring 16. At this time, the concrete 20 in the cavity 4 is pressed into the inner space of the anchor head 2 along the guide tube 9 and the hose 11;

[0044] ③ As the concrete slurry is continuously pressed in, the piston 13 is pushed outward, and the inserted rebar 14 is inserted outward into the soil layer; when the piston 13 is pushed to the end, the poured concrete 20 can flow out from the grouting port 19 and continue to flow along the inserted rebar 14, forming a concrete inclusion body centered on the inserted rebar, that is, a reinforced grouting enhanced structure.

[0045] The above is only a preferred implementation of the technology of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A torpedo anchor reinforcement grouting device for enhancing pull-out bearing capacity, characterized in that: It comprises a torpedo anchor (1), an anchor head (2), a tail fin (3), a cavity (4), an anchor chain (5), a support block (6), a guide tube (9), a pin (18) and concrete (20); The torpedo anchor (1) is a cylindrical body with a conical anchor head (2) at the front end, four tail wings (3) arranged around the tail, and the center point of the tail end is connected to the anchor chain (5); The cavity (4) is connected to the inner wall of the torpedo anchor (1) through surrounding support blocks (6); an injection port (7) is connected to the tail end of the torpedo anchor at the top of the cavity and is used to inject concrete into the cavity; an exhaust port (8) is provided at the top of the cavity (4) and is connected to the external air or seawater, and is used to discharge the cavity gas or seawater when concrete (20) is injected into the cavity, and to introduce gas or seawater into the cavity when concrete in the cavity is poured into the anchor head (2) branch; an extendable and contractible film (23) is provided on the upper layer of the cavity to shield seawater from intruding into the concrete (20); the film contracts upward when concrete is injected into the cavity, and extends when concrete is discharged downward; The lower end of the cavity (4) is connected to a conduit (9), and concrete (20) flows downward from the cavity into the conduit; the conduit (9) is located at the axis of the torpedo anchor (1), and four valves (10) with a timed opening function are arranged inside the conduit, and the valves (10) are connected to a hose (11); when the valves (10) are opened, the concrete (20) is pressed into the four branches of the anchor head (2) along the hose (11) under the action of its own weight; The anchor head (2) is composed of four branches with independent closed spaces, and each branch can be independently expanded outward around the connection between the anchor head and the guide tube (9); each branch of the anchor head (2) is provided with a connecting rod (12), a piston (13), a dowel (14), a sliding rod (15), a spring (16), a slot (17), a grouting port (19), an inner frame (21) and an outer frame (22); A plurality of connecting rods (12) are connected to the inner frame (21) at multiple points to support the stability of the internal structure; the sliding rod (15) passes through the central hole of the outer frame (22) to restrict the expansion direction of the branches of the anchor head (2); the spring (16) is sleeved on the sliding rod (15) and is in a compressed state under the pressure of the outer frame (22) when the branches of the anchor head are not expanded; when the pin (18) is pulled out of the slot (17), the spring (16) pushes the outer frame (22) outward to make the branches of the anchor head expand outward; The piston (13) is connected to the dowel (14), and the dowel can be inserted outward into the soil layer under the driving force of concrete extrusion; when the piston (13) is pushed to the end, the poured concrete (20) flows out from the exposed grouting port (19), and continues to flow along the dowel (14), forming a concrete inclusion body centered on the dowel; the outer frame (22) is provided with a plurality of dowel (14) insertion holes, which are arranged in a radial shape, allowing a plurality of dowels (14) to pass through and be inserted into the soil layer, forming a spatial reinforced structure; The pin (18) is connected to the inner wall of the torpedo anchor (1) via a connecting piece and has a timed opening function.

2. A working method of a torpedo anchor reinforcement grouting device for enhancing the pull-out bearing capacity, characterized in that: The connection of the torpedo anchor reinforcement grouting enhanced pull-out bearing capacity device according to claim 1 is carried out in the following specific steps: ① The torpedo anchor (1) is transported to the target drop location by a construction vessel, the mixed concrete (20) is poured into the cavity (4) of the torpedo anchor, and the torpedo anchor is released to allow it to sink freely and penetrate into the seabed until it is stable; ② After the entire device is stable, the pin (18) is automatically loosened and the valve (10) is automatically opened according to the preset time, and the branches of the anchor head (2) are expanded outward under the action of the spring (16). At this time, the concrete (20) in the cavity (4) is pressed into the internal space of the anchor head (2) along the guide tube (9) and the hose (11); ③ As the concrete slurry is continuously pressed in, the piston (13) is pushed outward, and the inserted rebar (14) is inserted outward into the soil layer; when the piston (13) is pushed to the end, the poured concrete (20) flows out from the grouting port (19) and continues to flow along the inserted rebar (14), forming a concrete inclusion body centered on the inserted rebar, i.e., a reinforced grouting enhanced structure.

3. The method according to claim 2, characterized in that By pouring cheap large-volume concrete into the torpedo anchor to increase its deadweight, the initial penetration depth of the torpedo anchor is increased. The weight of the large-volume concrete drives the piston in the expanded anchor head branch to insert the inserted rebar outward into the soil layer, and grouting is performed around the inserted rebar to form a reinforced grouting-reinforced structure centered on multiple inserted rebars, greatly enhancing the pull-out bearing capacity of the torpedo anchor.

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