Cured soil hydraulic reclamation construction method

Abstract

The invention provides a consolidated soil hydraulic reclamation construction method. The consolidated soil hydraulic reclamation construction method comprises the following steps that a crane installed on a construction ship lowers a mud outlet pipe head provided with sea sweeping equipment to the position below the water surface of the periphery of each row of pile bodies; the workboat drives the sea sweeping equipment to sail around the periphery of each row of pile bodies, the sea sweeping equipment sweeps and measures the first surrounding environment of each pile body, the first surrounding environment comprises the terrain and obstacle distribution, and the terrain comprises a scouring pit; after sweeping, the mud outlet pipe head is lifted out of the water surface, the sea sweeping equipment is dismantled, the mud outlet pipe head is connected into a solidified soil conveying device on a construction ship, and according to the first surrounding environment obtained through sweeping, the crane transfers the mud outlet pipe head provided with the seabed positioner and the depth finder to the position above the sea level of a hydraulic reclamation site, and then the mud outlet pipe head is connected into the solidified soil conveying device; a mud outlet pipe head is lowered to the position where a pipe opening makes contact with the seabed surface of the hydraulic reclamation site; and the solidified soil conveying device conveys solidified soil to the hydraulic reclamation site so as to carry out hydraulic reclamation operation. According to the construction method, the construction efficiency is improved, the hydraulic reclamation quality is guaranteed, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-scouring of pile foundations of offshore wind power projects, and in particular to a solidified soil blowing and filling construction method. Background Art

[0002] Offshore wind power is currently a vital source of electricity. The scour resistance of wind turbines directly impacts their operational safety and service life. Currently, blown-fill soil consolidation is commonly used to ensure scour resistance, but this current construction method fails to achieve both high quality and high efficiency. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention aims to provide a solidified soil filling construction method that is beneficial to improving construction efficiency, ensuring filling quality and reducing construction costs.

[0004] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0005] A solidified soil blown fill construction method comprises the following steps:

[0006] The crane installed on the construction vessel lowers the mud discharge pipe head with the sea sweeping equipment installed to the water surface outside each row of piles;

[0007] The construction vessel drives the sea-sweeping equipment to sail around the periphery of each row of piles, and the sea-sweeping equipment scans the first surrounding environment of each pile, wherein the first surrounding environment includes the terrain and the distribution of obstacles, and the terrain includes scour pits;

[0008] After the survey, the mud discharge pipe head is lifted above the water surface and the sea-sweeping equipment is removed. The mud discharge pipe head is connected to the solidified soil conveying device on the construction vessel. Based on the first surrounding environment surveyed, the crane moves the mud discharge pipe head, equipped with both the seabed locator and the depth sounder, to above the sea level of the filling site. The mud discharge pipe head is then lowered until the pipe opening contacts the seabed surface at the filling site.

[0009] The solidified soil conveying device conveys solidified soil to the filling site for filling operation, the seabed locator is used to determine the location of the filling point, and the depth sounder is used to monitor the seabed mud surface height and filling progress in real time.

[0010] In some possible implementations, the steps are further included:

[0011] After the filling operation is completed, the crane moves the mud discharge pipe head out of the water surface and removes the seabed locator and the depth sounder. The crane lowers the mud discharge pipe head with the sea-sweeping equipment installed below the water surface. The construction ship drives the sea-sweeping equipment to sail around the periphery of each row of the piles. The sea-sweeping equipment scans the second surrounding environment of each pile after filling and issues a scanning report. Based on the second surrounding environment, the positions that do not meet the specification requirements are supplemented by filling.

[0012] In some possible embodiments, a first guide rail is fixed to the load-bearing surface of the construction vessel, and the number of the cranes is two, the two cranes are arranged in a row and are both slidably connected to the first guide rail, so that the two cranes can move toward or away from each other;

[0013] In the step of scanning the first surrounding environment and the second surrounding environment, a crane lifts the mud discharge pipe head installed with the sea sweeping equipment to perform a scanning operation;

[0014] After the first surrounding environment is scanned, the two cranes are used to move at least two mud discharge pipe heads equipped with the seabed locator and the depth sounder to two filling locations on opposite sides of the pile body, and the solidified soil conveying device simultaneously conveys solidified soil to the two filling locations.

[0015] In some possible embodiments, after completing the filling operation at the first two filling locations, the construction vessel sails away from the pile body, prepares the solidified soil required for the other two filling locations, and repeats the filling steps of the first two filling locations during the next low tide period to fill the other two filling locations on the same opposite sides of the pile body to complete the filling operation of the pile body.

[0016] In some possible embodiments, the crane includes a support base, an arm, a hook, and a second guide rail, the support base is slidably connected to the first guide rail, the arm is horizontally installed at an end of the support base away from the first guide rail, the second guide rail is provided on the arm, and the hook is slidably connected to the second guide rail;

[0017] During the filling operation steps at the last two filling locations, the construction ship sails back to the side of the pile body close to the first two filling locations, and the hook of each crane moves relative to the second guide rail to above the sea level of the last filling location, so that the mud discharge pipe head can be lowered to the seabed surface of the sea at the last filling location.

[0018] In some possible implementations, two columns spaced apart are provided at an edge of the pipe opening of the mud discharge pipe head, the seabed locator is tied to one of the columns via a cable tie, and the depth sounder is tied to the other column via a cable tie.

[0019] In some possible implementations, the depth to which the mud discharge pipe head equipped with the sea-sweeping equipment is lowered below the water surface is greater than the draft depth of the construction vessel.

[0020] In some possible implementations, the speed of the construction vessel sailing around the periphery of each row of piles is 1 to 1.6 knots.

[0021] In some possible implementations, the sea-sweeping device is a multi-beam sea-sweeping device.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In this application, by using sea-sweeping equipment, seabed locators, and depth sounders in conjunction, the location and volume of scour pits can be accurately determined, and the seabed mud level and filling progress can be monitored in real time, thereby accurately controlling the amount of solidified soil and ensuring the quality of filling. Therefore, this application can reduce material waste to reduce construction costs while ensuring construction quality. In addition, the sea-sweeping equipment uses a row-by-row scanning method to increase the scanning area and shorten the voyage, which is beneficial for the construction ship to quickly anchor and position. Therefore, this application also helps to improve construction efficiency.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flowchart of a solidified soil filling construction method provided in one embodiment of the present application;

[0026] Figure 2 A schematic structural diagram of a construction vessel, a crane, and a solidified soil conveying device provided in one embodiment of the present application;

[0027] Figure 3 A top view of the connection between the mud discharge pipe head, sea sweeping equipment, and columns provided in one embodiment of the present application;

[0028] Figure 4 A detour route map provided for an embodiment of the present application;

[0029] Figure 5 A top view of a construction vessel in operation according to an embodiment of the present application;

[0030] Figure 6 Another top view of the construction vessel in operation according to one embodiment of the present application;

[0031] Figure 7 A schematic structural diagram of a crane provided in one embodiment of the present application.

[0032] Description of Figure Numbers:

[0033] 10 - Mud discharge pipe head; 11 - Column; 20 - Sea sweeping equipment; 30 - Pile; 301 - Filling site; 40 - Construction vessel;

[0034] 41 - first guide rail; 50 - crane; 51 - support base; 52 - boom; 53 - hook; 54 - roller; 55 - remote control;

[0035] 60 - Solidified soil conveying device; 61 - Preparation tank; 62 - Pump. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there can be an element in the middle. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be an element in the middle. When an element is referred to as "set on" another element, it can be set on the other element or there can be an element in the middle.

[0038] Reference Figure 1 The present application provides a method for solidified soil filling construction, comprising the following steps:

[0039] Step 1 S101: Combine with reference Figures 2 to 3 The crane 50 installed on the construction ship 40 lowers the mud discharge pipe head 10 with the sea-sweeping equipment 20 installed to below the water surface outside each row of piles 30. For example, the crane 50 can be rotated to the top of the construction ship 40 to lift the mud discharge pipe head 10 with the sea-sweeping equipment 20 installed, and then rotated to the top of the sea surface outside the construction ship 40 area to lower the mud discharge pipe head 10 below the water surface.

[0040] In some embodiments, reference Figure 2The load-bearing surface of the construction vessel 40 is fixed with a first guide rail 41. For example, the load-bearing surface of the construction vessel 40 can be fixed with two first guide rails 41 spaced apart from each other at the fore and aft positions. There are two cranes 50, which are arranged in a row and are both slidably connected to the first guide rails 41, so that the two cranes 50 can move toward or away from each other. For example, each crane 50 can be slidably connected to a first guide rail 41, and the two cranes 50 can also be slidably connected to the same first guide rail 41. The crane 50 is slidably connected to the first guide rail 41, so that the crane 50 can be flexibly moved to transfer the mud discharge pipe head 10 to different filling locations. Therefore, the slidable crane 50 is conducive to improving the flexibility of the construction method, thereby improving the construction efficiency.

[0041] In some embodiments, the depth to which the mud discharge pipe head 10 equipped with the sea-sweeping device 20 is lowered below the water surface is greater than the draft of the construction vessel 40. For example, when the draft of the construction vessel is 2 to 4 meters, the mud discharge pipe head 10 equipped with the sea-sweeping device 20 can be lowered to 6 meters below the water surface. The lowering depth of the mud discharge pipe head 10 equipped with the sea-sweeping device 20 facilitates the sea-sweeping device 20 to avoid collision with the construction vessel 40 when navigating around the pile body 30 in the subsequent steps, thereby improving the safety of the construction equipment.

[0042] In some embodiments, the sea sweeping device 20 is a multi-beam sea sweeping device. For example, the sea sweeping device can be a Danish RESON ScaBat T50-P type, a US R2sonic Sonic 2026 type, a US ODOM MB2 type, a Norwegian Kongsberg EM2040 type, a Canadian Imagenex DT101 type, etc. For example, the sea sweeping device 20 can be fixed to the circumferential surface of the mud discharge pipe head 10 (refer to Figure 3 ).

[0043] For example, the mud discharge pipe head 10 can be fixed to a bracket (not shown) by bolts, and the crane 50 can lift the bracket to drive the mud discharge pipe head 10 to move.

[0044] Step 2 S102: Combine with reference Figure 2 The construction ship 40 drives the sea sweeping equipment 20 to sail around the periphery of each row of pile bodies 30 (combined with reference to Figure 4), exemplarily, the pile body 30 may include a wind turbine, and the sea-sweeping equipment 20 scans the first surrounding environment of each pile body 30, where the first surrounding environment includes terrain and obstacle distribution, with the terrain including scour pits. That is, the sea-sweeping equipment 20 can scan scour pits around a single pile, and can also scan terrain and obstacles farther from the single pile, thereby facilitating rapid anchoring and positioning of the construction vessel 40. Furthermore, compared to the sea-sweeping equipment 20 navigating around a single pile, the sea-sweeping equipment 20 scanning in a row shortens the navigating distance, thereby improving sea-sweeping efficiency. Exemplarily, the sea-sweeping equipment 20 can issue a scanning report on the first surrounding environment.

[0045] In some embodiments, during the step of scanning the first surrounding environment, a crane 50 carries the mud discharge pipe head 10 with the sea sweeping equipment 20 installed thereon to perform a scanning operation.

[0046] In some embodiments, the speed of the construction vessel 40 sailing around the periphery of each row of piles 30 is 1 to 1.6 knots. The sailing speed of the construction vessel 40 is beneficial to improving the movement stability of the mud discharge pipe head 10.

[0047] Step 3 S103: After the survey, the mud discharge pipe head 10 is lifted out of the water and the sea sweeping equipment 20 is removed. For example, the crane 50 can rotate to transfer the mud discharge pipe head 10 lifted out of the water to the construction ship 40, so as to facilitate the workers to remove the sea sweeping equipment 20. The mud discharge pipe head 10 is connected to the solidified soil conveying device 60 on the construction ship 40 (see the reference to the embodiment of the present invention). Figure 2 、 Figure 5 and Figure 6 ), exemplarily, the solidified soil conveying device 60 may include a preparation pool 61 (two preparation pools 61 are shown in the figure) and a pump 62. Exemplarily, the solidified soil may be configured in the preparation pool 61. Exemplarily, the solidified soil may include soil, water and a curing agent. Exemplarily, the curing agent may be a water glass or epoxy resin curing agent. The pump 62 is connected between the sampling end of the mud discharge pipe head 10 and the preparation pool 61 to transport the solidified soil from the preparation pool 61 to the pipe mouth of the mud discharge pipe head 10. According to the first surrounding environment scanned, the user can control the crane 50 to move the mud discharge pipe head 10 equipped with both the seabed locator and the depth sounder to above the sea level of the filling site, and then lower the mud discharge pipe head 10 until the pipe mouth contacts the seabed surface.

[0048] Step 4 (S104): The solidified soil conveying device 60 delivers solidified soil to the filling site for filling operations. The seabed locator is used to determine the location of the filling site, thereby improving filling accuracy. The depth sounder is used to monitor the seabed mud level and filling progress in real time, thereby improving construction efficiency. Exemplary seabed locators can include the ROS underwater pan-tilt PT25-Ti titanium alloy locator, the UK ImpactSubsea ISA500 series underwater altimeter, or the UK Valeport VA500 seabed altimeter. Exemplary depth sounders can include the Danish RESON ScaBat T50-P, the Danish RESON ScaBat T50-P, the US R2sonic Sonic 2026, the US ODOM MB2, the Norwegian Kongsberg EM2040, or the Canadian Imagenex DT101. Exemplary sea sweeping equipment, the seabed locator, and the depth sounder can all feed image or digital signals to a display, such as a laptop computer.

[0049] In some embodiments, in conjunction with reference Figure 3 Two columns 11 are provided at intervals on the edge of the pipe mouth of the mud discharge pipe head 10. The seabed locator is tied to one column 11 by a cable tie, and the depth sounder is tied to the other column 11 by a cable tie.

[0050] In some embodiments, after the first surrounding environment is scanned, two cranes 50 are used to move at least two mud pipe heads 10 equipped with seabed locators and depth sounders to two filling locations 301 on opposite sides of a pile body 30, and the solidified soil conveying device 60 simultaneously conveys solidified soil to the two filling locations 301 (combined with reference to Figure 5 ). Exemplarily, each solidified soil conveying device 60 can convey solidified soil to each filling site 301, that is, each mud outlet pipe head 10 is connected between a preparation tank and a pump to convey solidified soil to a filling site 301. Specifically, the two cranes 50 can move relatively close to each other until the two cranes 50 lift the mud outlet pipe head 10 to the sea surface above the two filling sites 301 on opposite sides of a pile body 30 and then stop moving. Thereafter, the mud outlet pipe head 10 is lowered to the seabed surface of the corresponding filling site 301, so that filling operations can be performed on multiple filling sites 301 of the same pile body 30 at the same time. The solution of increasing the number of cranes 50 to simultaneously fill multiple filling sites 301 is conducive to improving construction efficiency and reducing the number of times the construction ship 40 moves.

[0051] In some embodiments, in conjunction with reference Figure 6After completing the filling operation at the first two filling locations 301, the construction vessel 40 moves away from the pile body 30 to prepare the solidified soil required for the other two filling locations 301. During the next slack tide period, the filling process for the first two filling locations 301 is repeated to fill the other two filling locations on opposite sides of the pile body 30, completing the filling operation for the entire pile body 30. This operation can reduce the adverse effects of tidal fluctuations on the filling operation, thereby further ensuring construction quality.

[0052] In some embodiments, in conjunction with reference Figure 7 The crane 50 includes a support base 51, an arm 52, a hook 53 and a second guide rail. The support base 51 is slidably connected to the first guide rail 41 (refer to Figure 5 and Figure 6 ), for example, a roller 54 can be installed at the end of the support base 51 close to the first guide rail 41, and the roller 54 can be arranged in the first guide rail 41 to achieve a sliding connection. For example, the sliding connection can also be achieved in combination with the method of screw pushing (the specific structure refers to the working mechanism of the screw moving base), the arm 52 is installed horizontally at the end of the support base 51 away from the first guide rail 41, that is, the arm 52 and the support base 51 are arranged crosswise, the second guide rail (not shown) is provided on the arm 52, and the hook 53 is slidably connected to the second guide rail. For example, the extension direction of the second guide rail and the arm 52 can be the same. For example, the end of the hook close to the arm 52 can be partially provided in the groove of the second guide rail to achieve a sliding connection between the two, or the second guide rail can be provided in the groove of the end of the hook close to the arm 52 to achieve a sliding connection between the two.

[0053] Combined with reference Figure 6 During the filling operation at the second two filling locations 301, the construction vessel 40 sails back to the side of the pile body 30 near the first two filling locations 301. The hook 53 of each crane 50 moves relative to the second guide rail to above the sea level of the second filling location 301, allowing the mud pipe head 10 to be lowered to the seabed surface at the second filling location 301, thereby completing the filling operation at the second two filling locations 301. The structure of the crane 50 facilitates construction at multiple filling locations 301 from a single side, thereby shortening the voyage during the filling operation and further improving construction efficiency.

[0054] In another embodiment, during the filling operation steps at the last two filling locations 301, the construction vessel 40 can travel around the pile body 30 to the side of the pile body 30 away from the first two filling locations 301, and then perform the filling operation at the last two filling locations 301. It can be understood that at this time, the second guide rail of the crane 50 can be omitted, and the structure of the crane 50 can also be changed.

[0055] Step 5 S105: After the filling operation is completed, the crane 50 moves the mud discharge pipe head 10 out of the water and removes the seabed locator and depth sounder. For example, the crane 50 can be rotated from above the sea surface outside the construction vessel 40 area to above the construction vessel 40 to facilitate the removal of the seabed locator and depth sounder. The crane 50 lowers the mud discharge pipe head 10 with the sweeping equipment 20 installed below the water surface. The construction vessel 40 drives the sweeping equipment 20 to navigate around the periphery of each row of piles 30. The sweeping equipment 20 scans the secondary surrounding environment of each pile 30 after filling and issues a scanning report. Based on the secondary surrounding environment, additional filling is performed on locations that do not meet the regulatory requirements. For locations that meet the regulatory requirements, the scanning report can serve as the basis for acceptance of the solidified soil construction.

[0056] In some embodiments, during the step of scanning the second surrounding environment, a crane 50 carries the mud discharge pipe head 10 with the sea sweeping equipment 20 installed thereon to perform a scanning operation.

[0057] In the above steps, the operation of the crane 50 can be controlled by a remote control 55 or an operating panel of the crane 50. The specific operating principle of the crane is known in the art and will not be described in detail here. The crane 50 can be lowered and raised by the coordination of gears and cables. All existing cranes 50 are capable of both lowering and raising operations, so the specific mechanism and structure will not be described here.

[0058] In this application, the coordinated use of the sea-sweeping equipment 20, a seabed locator, and a depth sounder allows for the precise determination of the location and volume of the scour pit, as well as real-time monitoring of the seabed mud level and the progress of the filling process. This allows for precise control of the amount of solidified soil used and ensures the quality of the filling process. Therefore, this application can reduce material waste, thereby reducing construction costs while also ensuring construction quality. Furthermore, the sea-sweeping equipment 20 employs a row-based scanning method to increase the scanning area and shorten the voyage, thereby facilitating the rapid anchoring and positioning of the construction vessel 40. Therefore, this application also improves construction efficiency.

[0059] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A solidified soil filling construction method, characterized in that: The following steps are involved: The crane installed on the construction vessel lowers the mud discharge pipe head with the sea sweeping equipment installed to the water surface outside each row of piles; The construction vessel drives the sea-sweeping equipment to sail around the periphery of each row of piles, and the sea-sweeping equipment scans the first surrounding environment of each pile, wherein the first surrounding environment includes the terrain and the distribution of obstacles, and the terrain includes a scour pit; After the survey, the mud discharge pipe head is lifted above the water surface and the sea-sweeping equipment is removed. The mud discharge pipe head is connected to the solidified soil conveying device on the construction vessel. Based on the first surrounding environment surveyed, the crane moves the mud discharge pipe head, equipped with both the seabed locator and the depth sounder, to above the sea level of the filling site. The mud discharge pipe head is then lowered until the pipe opening contacts the seabed surface at the filling site. The solidified soil conveying device conveys solidified soil to the filling site for filling operation, the seabed locator is used to determine the location of the filling point, and the depth sounder is used to monitor the seabed mud surface height and filling progress in real time.

2. The solidified soil filling construction method according to claim 1, characterized in that: Also includes the steps: After the filling operation is completed, the crane moves the mud discharge pipe head out of the water surface and removes the seabed locator and the depth sounder. The crane lowers the mud discharge pipe head with the sea-sweeping equipment installed below the water surface. The construction ship drives the sea-sweeping equipment to sail around the periphery of each row of the piles. The sea-sweeping equipment scans the second surrounding environment of each pile after filling and issues a scanning report. Based on the second surrounding environment, the positions that do not meet the specification requirements are supplemented by filling.

3. The solidified soil filling construction method according to claim 2, characterized in that: A first guide rail is fixed to the bearing surface of the construction vessel, and the number of the cranes is two, the two cranes are arranged in a row and are both slidably connected to the first guide rail, so that the two cranes can move towards or away from each other; In the step of scanning the first surrounding environment and the second surrounding environment, a crane lifts the mud discharge pipe head installed with the sea sweeping equipment to perform a scanning operation; After the first surrounding environment is scanned, the two cranes are used to move at least two mud discharge pipe heads equipped with the seabed locator and the depth sounder to two filling locations on opposite sides of the pile body, and the solidified soil conveying device simultaneously conveys solidified soil to the two filling locations.

4. The solidified soil filling construction method according to claim 3, characterized in that: After completing the filling operation at the first two filling locations, the construction vessel sails away from the pile body and prepares the solidified soil required for the other two filling locations. During the next low tide period, the filling steps of the first two filling locations are repeated to fill the other two filling locations on the same opposite sides of the pile body to complete the filling operation of the pile body.

5. The solidified soil filling construction method according to claim 4, characterized in that: The crane includes a support base, an arm, a hook and a second guide rail, the support base is slidably connected to the first guide rail, the arm is horizontally installed on an end of the support base away from the first guide rail, the second guide rail is provided on the arm, and the hook is slidably connected to the second guide rail; During the filling operation steps at the last two filling locations, the construction ship sails back to the side of the pile body close to the first two filling locations, and the hook of each crane moves relative to the second guide rail to above the sea level of the last filling location, so that the mud discharge pipe head can be lowered to the seabed surface of the sea at the last filling location.

6. The solidified soil filling construction method according to claim 1, characterized in that: Two columns are arranged at intervals on the edge of the pipe opening of the mud discharge pipe head. The seabed locator is tied to one of the columns by a cable tie, and the depth sounder is tied to the other column by a cable tie.

7. The solidified soil filling construction method according to claim 2, characterized in that: The depth to which the mud discharge pipe head equipped with the sea sweeping equipment is lowered below the water surface is greater than the draft depth of the construction vessel.

8. The solidified soil filling construction method according to claim 1, characterized in that: The speed of the construction vessel sailing around the periphery of each row of piles is 1 to 1.6 knots.

9. The solidified soil filling construction method according to claim 1, characterized in that: The sea sweeping equipment is a multi-beam sea sweeping equipment.

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