CN111395397A - Bending type immersed tube anti-deformation structure and construction method - Google Patents

Abstract

The invention discloses a bending type immersed tube anti-deformation structure and a construction method, belonging to the field of immersed tubes, and the bending type immersed tube anti-deformation structure comprises an immersed tube body, wherein the immersed tube body comprises a first tube section and a second tube section, and an included angle between the first tube section and the second tube section is an acute angle; the first pipe section and the second pipe section are both sleeved with distance adjusting mechanisms, and the distance adjusting mechanisms can move along the axial direction of the first pipe section and the second pipe section; each distance adjusting mechanism is connected with a counterweight buoyancy tank, and an included angle between each counterweight buoyancy tank and the axis of each first pipe section and the axis of each second pipe section is adjustable. The buoyancy of the counterweight buoyancy tank is perpendicular to the plane of the counterweight buoyancy tank, the position of the counterweight buoyancy tank on the immersed tube body and the included angle between the counterweight buoyancy tank and the immersed tube body are changed, and the angle of the immersed tube during immersion can be changed, so that the counterweight buoyancy tank is stressed uniformly and is not easy to bend and deform during immersion.

Description

A kind of bending type immersed tube deformation prevention structure and construction method

technical field

The invention relates to the field of immersed tubes, in particular to a bending-type immersed tube deformation prevention structure and a construction method.

Background technique

Floating box hanging and settling method is a relatively new pipe section settling method. Usually, 4 square pontoons are placed above the pipe section, and the pipe section is directly hoisted with slings. The pontoon is divided into two groups, the front and the rear. The two pontoons in each group are connected by steel trusses, and each group of pontoons is positioned with anchor cables. A hoisting winch and a floating box positioning winch are installed on the top of the floating box. The positioning of the pipe section must be pulled by another anchor cable at the left and right, front and rear, and the positioning winch is set on the top of the positioning tower. The main feature of this sinking method is that the equipment is simple, and it is suitable for large and medium-sized pipe sections with a width of more than 20 meters.

Chinese Patent Document Publication No. CN104676108A discloses a design method for a cross-sea steel immersed tube. The design method of the sea-crossing steel immersed pipe includes the following steps: (1) the sea-crossing steel immersed pipe includes two upper-bend sections and two lower-bend sections with equal curvature radii on the same plane, and the pipeline route is determined according to the topography of the seabed Layout; (2) Calculate the design curvature radius: According to the strength of the pipeline material and its stress characteristics, the design curvature radius is calculated according to the specification, and the arc length of the upper and lower bending sections is determined according to the pipeline layout and the design curvature radius; ( 3) Based on the layout of the pipeline route and the design curvature radius, a foundation groove matching the pipeline route shall be dug in the seabed; (4) The pipeline shall be towed during construction, and the curvature radius after the pipeline is laid down shall be equal to the design curvature radius.

When the immersed pipe is installed, in order to better connect the water and the land, the immersed pipe at this position needs to be made into a bent one-piece pipe, and the outer wall of the pipe will be coated to prevent rust. The bent immersed tube is prone to deformation during installation, which makes the coating easy to fall off, resulting in damage to the quality of the immersed tube.

SUMMARY OF THE INVENTION

In order to overcome the defects of the prior art, the technical problem to be solved by the present invention is to propose a bending-type immersed tube anti-deformation structure. During installation, the sinking angle of the immersed tube body is changed, so that the force is uniform and it is not easy to deform, so that the immersed tube is not easily deformed. Installation quality is guaranteed.

For this purpose, the present invention adopts the following technical solutions:

A bending-type immersed tube deformation prevention structure provided by the present invention includes an immersed tube body, and the immersed tube body includes a first tube section and a second tube section, and the included angle between the first tube section and the second tube section is Acute angle; a distance adjustment mechanism is sleeved on the first pipe section and the second pipe section, and the distance adjustment mechanism can move along the axis direction of the first pipe section and the second pipe section; each of the distance adjustment mechanisms Each mechanism is connected with a counterweight floating box, and the included angle between the counterweight floating box and the axes of the first pipe section and the second pipe section is adjustable.

The preferred technical solution of the present invention is that the distance adjustment mechanism includes two side-by-side mounting rings, a number of guide wheels are arranged inside the mounting rings, and a matching guide rib groove is arranged on the lower side of the immersed tube body. The guide wheels on the side move along the length direction of the guide rib grooves, and the remaining guide wheels abut against the side walls of the immersed tube body.

A preferred technical solution of the present invention is that the distance adjustment mechanism further includes two waterproof motors, a fixed platform is arranged between the two installation rings, and the two waterproof motors are both fixed on the fixed platform; the Both ends of the immersed tube body and the turning point are provided with connecting seats, and the two waterproof motors are respectively connected to the two connecting seats on both sides of the immersed tube by cables.

The preferred technical solution of the present invention is that two connecting rods are arranged under one side of the counterweight floating box, the other ends of the two connecting rods are fixedly connected with a rotating shaft, and the outer side of the mounting ring is provided with a matching mounting ring. A support, the rotating shaft is rotatably connected with the installation support, and a telescopic device is provided under the other side of the counterweight floating box.

The preferred technical solution of the present invention is that the telescopic device comprises a waterproof telescopic rod, one end of the waterproof telescopic rod is fixed on the lower side of the counterweight floating box, and the other end of the waterproof telescopic rod is provided with a connecting shaft, so The outer side of the mounting ring is provided with a sliding support, a long groove is arranged on the sliding support, and the connecting shaft is rotatably connected to the long groove, and can be along the length direction of the long groove move.

A preferred technical solution of the present invention is that several fixing rods are arranged between the two mounting rings.

The preferred technical solution of the present invention is that the installation directions of the two waterproof motors are opposite, so as to connect the connection bases from both sides, so as to balance the transmission force.

A construction method for an anti-deformation structure of a bending type immersed tube, comprising step S00: welding a guide rib groove and a connecting seat on the outer side of the immersed tube body, and then providing an anti-rust coating on the outer side of the entire immersed tube body; step S10: by fixing The rod welds the two mounting rings together, and at the same time welds the fixed platform, welds the mounting support and the sliding support on the mounting ring, fixes the two waterproof motors on the fixed platform, and sets the welded mounting rings separately. Enter the first pipe section and the second pipe section, and then connect the waterproof motor output shaft and the connection seat with a cable; Step S20: hoist the immersed tube body with the installation ring installed to the water surface, and complete the connection of the counterweight floating box in the water; Step S30: Start the waterproof motor to adjust the position of the counterweight floating box, and at the same time adjust the length of the waterproof telescopic rod, so that when the counterweight floating box is in a horizontal state, the axis direction of the first pipe section and the second pipe section and the direction of the horizontal line form an isosceles triangle; Step S40: change The buoyancy of the counterweight buoyancy box makes the immersed tube sink slowly, and at the same time, the ship crane is used for coordinating placement. When descending, the waterproof motor and waterproof telescopic rod can be adjusted according to the force of the immersed tube body; Step S50: In the stage of placing the immersed tube, pass Extend the waterproof telescopic motor of the first pipe section, shorten the waterproof telescopic motor of the second pipe section, and at the same time change the buoyancy of the counterweight floating box, so that the immersed tube body reaches the angle that needs to be installed, and then complete the installation; Step S60: Cut the installation ring Remove it, lift it up by a ship crane, and fix the immersed tube body.

The beneficial effects of the present invention are:

A bending-type immersed tube deformation prevention structure provided by the present invention includes an immersed tube body, and the immersed tube body includes a first tube section and a second tube section, and the included angle between the first tube section and the second tube section is Acute angle; a distance adjustment mechanism is sleeved on the first pipe section and the second pipe section, and the distance adjustment mechanism can move along the axis direction of the first pipe section and the second pipe section; each of the distance adjustment mechanisms Each mechanism is connected with a counterweight floating box, and the included angle between the counterweight floating box and the axes of the first pipe section and the second pipe section is adjustable. The buoyancy of the counterweight pontoon is perpendicular to its plane, changing its position on the immersed tube body and the angle between it and the immersed tube body can change the angle of the immersed tube when it sinks, so that the force is uniform and not easy to bend during sinking. deformed.

Description of drawings

1 is a schematic diagram of the overall structure of the bending-type immersed tube anti-deformation structure provided in the specific embodiment of the present invention;

2 is an enlarged schematic diagram of part A in FIG. 1 provided in the specific embodiment of the present invention;

3 is a schematic diagram of the end surface structure of the bending-type immersed tube deformation-resistant structure provided in the specific embodiment of the present invention;

In the picture:

1. Immersed tube body; 11. First pipe section; 12. Second pipe section; 13. Guide rib groove; 14. Connecting seat; 21. Fixing rod; 22. Fixing platform; 23. Mounting support; 24. Guide wheel ;3, counterweight floating box; 31, connecting rod; 32, rotating shaft; 4, distance adjustment mechanism; 41, waterproof motor; 42, mounting ring; 5, telescopic device; 51, waterproof telescopic rod; 52, sliding support ; 511, connecting shaft; 521, long slot.

Detailed ways

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

As shown in FIG. 1 , a bending-type immersed pipe anti-deformation structure provided in this embodiment includes an immersed pipe body 1 , and the immersed pipe body 1 includes a first pipe section 11 and a second pipe section 12 . The included angle between the pipe section 11 and the second pipe section 12 is an acute angle; the first pipe section 11 and the second pipe section 12 are both sleeved with a distance adjustment mechanism 4, and the distance adjustment mechanism 4 can be arranged along the second pipe section. A pipe section 11 and the second pipe section 12 move in the axial direction; each of the distance adjustment mechanisms 4 is connected with a counterweight floating box 3 , the counterweight floating box 3 and the first pipe section 11 and the first pipe section 11 and the first pipe section 11 The included angle between the axes of the two pipe sections 12 is adjustable. Since the buoyancy of the counterweight pontoon 3 is perpendicular to its plane, the buoyancy of the two counterweight pontoons 3 can be adjusted simultaneously by changing the different positions of the distance adjusting mechanism 4 on the first pipe section 11 and the second pipe section 12 when sinking. , so that the height position of the first pipe section 11 and the second pipe section 12 where the mounting ring 42 is connected can be changed, thereby changing the spatial position of the immersed pipe body 1 when it is sunk, so that the immersed pipe body 1 is evenly stressed when sunk, and it is not easy to Deformation results in damage to the anti-rust coating. At the same time, the angle between the counterweight pontoon 3 and the immersed tube body 1 is adjusted by the waterproof telescopic rod 51 , so that the direction of the acting force can be changed, which can further assist in correcting the posture of the immersed tube body 1 .

Preferably, the distance adjusting mechanism 4 includes two side-by-side mounting rings 42 , and several fixing rods 21 are arranged between the two mounting rings 42 . Several guide wheels 24 are arranged on the inner side of the mounting ring 42 , matching guide rib grooves 13 are arranged on the lower side of the immersed tube body 1 , and the guide wheels 24 on the lower side are along the length direction of the guide rib groove 13 . Moving, the remaining guide wheels 24 abut against the side wall of the immersed tube body 1 . When sinking, the lower side of the immersed tube body 1 is subjected to a large force. By arranging the guiding rib grooves 13, all the acting forces can be concentrated in the guiding rib grooves 13, so that the other parts of the immersed tube body 1 are not easily deformed, and at the same time guide the rib grooves 13. The rib groove 13 can also constrain the mounting ring 42 well, so that it can only move along the length direction of the guide rib groove 13 without rotation. At the same time, the guiding rib grooves 13 can also play a better role with the foundation after the immersed tube body 1 is installed, thereby improving the installation strength.

Preferably, the distance adjusting mechanism 4 further includes two waterproof motors 41 , and the installation directions of the two waterproof motors 41 are opposite, so as to connect the connecting base 14 from both sides, so as to balance the transmission force. A fixed platform 22 is arranged between the two mounting rings 42 , and the two waterproof motors 41 are fixed on the fixed platform 22 ; both ends of the immersed tube body 1 and the turning point are provided with connecting seats 14 , The two waterproof motors 41 are respectively connected to the two connecting bases 14 on both sides thereof by cables. The waterproof motor 41 of the first pipe section 11 close to the pipe end face is connected to the connecting seat 14 at the pipe end face from one side of the fixed platform 22 , and the waterproof motor 41 of the first pipe section 11 close to the turning position is connected from the other side of the fixed platform 22 to the turning point. Connection base 14 . Similarly, the connection method of the second pipe section 12 is the same. When the mounting ring 42 needs to be adjusted to move to the bend, the waterproof motor 41 close to the bend rotates to shorten the cable, and the other waterproof motor 41 lengthens the cable. When acting, the forces of the two waterproof motors 41 are not in the same straight line. , so that a little twisting force will be generated, and the twisting force can interact with the twisting force generated by the action of the motor and the side of the mounting ring 42 , so that the mounting ring 42 is subjected to a more balanced force.

Preferably, two connecting rods 31 are provided under one side of the counterweight floating box 3 , the other ends of the two connecting rods 31 are fixedly connected with the rotating shaft 32 , and the outer side of the mounting ring 42 is provided with a matching mounting For the support 23 , the rotating shaft 32 is rotatably connected with the mounting support 23 , and a telescopic device 5 is provided under the other side of the counterweight floating box 3 . Further, the telescopic device 5 includes a waterproof telescopic rod 51, one end of the waterproof telescopic rod 51 is fixed to the lower side of the counterweight floating box 3, and the other end of the waterproof telescopic rod 51 is provided with a connecting shaft 511, The outer side of the mounting ring 42 is provided with a sliding support 52, a long groove 521 is provided on the sliding support 52, and the connecting shaft 511 is rotatably connected to the long groove 521, and can move along the groove 521. The elongated groove 521 moves in the longitudinal direction. When adjusting the angle between the counterweight floating box 3 and the first pipe section 11 or the second pipe section 12, the length of the waterproof telescopic rod 51 is changed, and the connecting shaft 511 of the waterproof telescopic rod 51 will slide along the length direction of the long groove 521, and at the same time The shaft 32 at the other end of the counterweight floating box 3 will rotate accordingly, the buoyancy of the counterweight floating box 3 is perpendicular to its plane, and changing the angle between the counterweight floating box 3 and the immersed tube body 1 can provide forces in different directions, thereby The posture of the immersed tube body 1 can be easily changed, so that the force is uniform during the sinking, and it is not easy to be bent and damaged.

A construction method for an anti-deformation structure of a bending type immersed tube, comprising step S00: welding a guide rib groove 13 and a connecting seat 14 on the outer side of the immersed tube body 1, and then providing an anti-rust coating on the outer side of the entire immersed tube body 1; step S10: Weld the two mounting rings 42 together through the fixing rod 21, weld the fixing platform 22 at the same time, weld the mounting support 23 and the sliding support 52 on the mounting ring 42, and fix the two waterproof motors 41 on the fixed On the platform 22, the welded mounting rings 42 are respectively sleeved into the first pipe section 11 and the second pipe section 12, and then the output shaft of the waterproof motor 41 and the connecting seat 14 are connected by cables; Step S20: the immersed tube with the mounting ring 42 installed The main body 1 is hoisted to the water surface, and the connection of the counterweight floating box 3 is completed in the water; Step S30: start the waterproof motor 41 to adjust the position of the counterweight floating box 3, and adjust the length of the waterproof telescopic rod 51 at the same time, so that the counterweight floating box 3 is horizontal In the state, the first pipe section 11 and the second pipe section 12 form an isosceles triangle in the axial direction and the horizontal line direction; Step S40: change the buoyancy of the counterweight buoyancy tank 3, so that the immersed tube sinks slowly, and at the same time, the ship crane is used to cooperate with it. At the same time, the waterproof motor 41 and the waterproof telescopic rod 51 can be adjusted according to the force of the immersed tube body 1; Step S50: in the immersed tube placement stage, by extending the waterproof telescopic motor of the first pipe section 11, the waterproof telescopic motor of the second pipe section 12 At the same time, the buoyancy of the counterweight buoyancy box 3 is changed, so that the immersed tube body 1 reaches the angle that needs to be installed, and then the installation is completed; Step S60: Cut and remove the installation ring 42, lift it by a ship crane, and fix the immersed tube body 1.

The present invention has been described in terms of preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited by the specific embodiments disclosed herein, and other embodiments falling within the claims of the present application all belong to the protection scope of the present invention.

Claims (8)

1. The bending type immersed tube anti-deformation structure comprises an immersed tube body (1), wherein the immersed tube body (1) comprises a first tube section (11) and a second tube section (12), and an included angle between the first tube section (11) and the second tube section (12) is an acute angle; the method is characterized in that:

the first pipe section (11) and the second pipe section (12) are both sleeved with distance adjusting mechanisms (4), and the distance adjusting mechanisms (4) can move along the axial direction of the first pipe section (11) and the second pipe section (12);

every all be connected with counter weight flotation tank (3) on roll adjustment mechanism (4), counter weight flotation tank (3) with first pipe section (11) with contained angle is adjustable between second pipe section (12) axis.

2. The bending type immersed tube deformation preventing structure according to claim 1, which is characterized in that:

roll adjustment mechanism (4) include two collar (42) side by side, collar (42) inboard is provided with a plurality of leading wheel (24), immersed tube body (1) downside is provided with direction arris strip groove (13) that match, and the downside leading wheel (24) are followed direction arris strip groove (13) length direction removes, all the other leading wheel (24) with immersed tube body (1) lateral wall offsets.

3. The bending type immersed tube deformation preventing structure according to claim 2, wherein:

the distance adjusting mechanism (4) further comprises two waterproof motors (41), a fixed platform (22) is arranged between the two mounting rings (42), and the two waterproof motors (41) are fixed on the fixed platform (22);

the two ends and the turning part of the immersed tube body (1) are respectively provided with a connecting seat (14), and the two waterproof motors (41) are respectively connected with the two connecting seats (14) at the two sides through cables.

4. The bending type immersed tube deformation preventing structure according to claim 1, which is characterized in that:

one side below of counter weight flotation tank (3) is provided with two connecting rods (31), two the other end fixedly connected with pivot (32) of connecting rod (31), the outside of collar (42) sets up the matched erection support (23) that has, pivot (32) with erection support (23) rotate to be connected, the opposite side below of counter weight flotation tank (3) is provided with telescoping device (5).

5. The bending type immersed tube deformation preventing structure according to claim 1, which is characterized in that:

telescoping device (5) are including waterproof telescopic link (51), the one end of waterproof telescopic link (51) is fixed in the downside of counter weight flotation tank (3), the other end of waterproof telescopic link (51) is provided with connecting axle (511), the outside of collar (42) is provided with sliding connection support (52), be provided with rectangular groove (521) on sliding connection support (52), connecting axle (511) rotate connect in rectangular groove (521), and can follow the length direction removal in rectangular groove (521).

6. The bending type immersed tube deformation preventing structure according to claim 2 or 3, which is characterized in that:

a plurality of fixing rods (21) are arranged between the two mounting rings (42).

7. The bending type immersed tube deformation preventing structure according to claim 3, wherein:

the two waterproof motors (41) are installed in opposite directions to connect the connection sockets (14) from both sides so that the driving force is balanced.

8. A construction method of a bending type immersed tube anti-deformation structure is characterized by comprising the following steps:

step S00: welding a guide ridge groove (13) and a connecting seat (14) on the outer side of the immersed tube body (1), and then arranging an antirust coating on the outer side of the whole immersed tube body (1);

step S10: welding two mounting rings (42) together through a fixing rod (21), welding a fixing platform (22) at the same time, welding a mounting support (23) and a sliding connection support (52) on the mounting rings (42), fixing two waterproof motors (41) on the fixing platform (22), respectively sleeving the welded mounting rings (42) into a first pipe section (11) and a second pipe section (12), and then connecting an output shaft of the waterproof motor (41) with a connecting seat (14) through a cable;

step S20: hoisting the immersed tube body (1) with the mounting ring (42) to the water surface, and completing the connection of the counterweight buoyancy tanks (3) in the water;

step S30: the position of the counterweight buoyancy tank (3) is adjusted by starting the waterproof motor (41), and the length of the waterproof telescopic rod (51) is adjusted at the same time, so that when the counterweight buoyancy tank (3) is in a horizontal state, the axial directions of the first pipe section (11) and the second pipe section (12) and the horizontal line direction form an isosceles triangle;

step S40: the buoyancy of the counterweight buoyancy tank (3) is changed, so that the immersed tube slowly sinks, and meanwhile, the immersed tube is placed in a ship crane in a matching way, and the waterproof motor (41) and the waterproof telescopic rod (51) can be adjusted according to the stress condition of the immersed tube body (1) when the immersed tube descends;

step S50: in the immersed tube placing stage, the waterproof telescopic motor of the first tube section (11) is extended, the waterproof telescopic motor of the second tube section (12) is shortened, and meanwhile, the buoyancy of the counterweight buoyancy tank (3) is changed, so that the immersed tube body (1) reaches the angle required to be installed, and then the immersed tube placing is completed;

step S60: and cutting and detaching the mounting ring (42), lifting the mounting ring by a boat crane, and fixing the immersed tube body (1).

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