Rapid earth-taking structure and earth-taking method for forming cofferdams in strong tidal surge areas

Abstract

The present invention relates to a rapid soil excavation structure and soil excavation method for forming a cofferdam in a strong tidal surge area. The structure belongs to the technical field of bank protection cofferdam construction technology, including a protective bank, a cofferdam construction area provided on the outer side of the protective bank, and tube bag partitions connected to the protective bank on both sides of the cofferdam construction area. The front ends of the tube bag partitions are each provided with a clay partition, and a cofferdam is provided between the two clay partitions. The cofferdam construction area is formed by surrounding the protective bank, the tube bag partitions, the clay partition, and the cofferdam. A steel trestle fixed to the protective bank ground bolts is erected above the cofferdam construction area. The steel trestle extends beyond the cofferdam and is equipped with a soil excavation mechanism. The structure has the advantages of compact structure, recyclability, safety, and high efficiency. The problem of tube bag soil cofferdams requiring large amounts of mud and water is solved. The structure effectively improves soil excavation efficiency while simultaneously desilting rivers.

Description

Technical Field

[0001] The present invention relates to the technical field of bank protection cofferdam construction, and in particular to a rapid soil excavation structure and soil excavation method for forming a cofferdam in a strong tidal surge area. Background Art

[0002] After the water in the cofferdam area is drained, manual construction can be carried out in the cofferdam area. The pipe bag soil cofferdam allows bank construction to be carried out at low tide. The pipe bag soil cofferdam is required during the cofferdam formation process in the strong tidal surge area.

[0003] The pipe bag soil utilizes the characteristics of silt sand, which has the characteristics of mud and water mixed and suspended, and can be transported by pipes. After standing, the mud and water will be quickly separated. After the silt sand and water are mixed, they are transported by pipes into a pre-sewn woven cloth bag with a certain strength. After the mud and water mixture stands in the bag, the mud and water will quickly separate to form a pipe bag soil cofferdam. The pipe bag soil is stacked layer by layer to form a temporary water retaining facility.

[0004] When using stacked soil tube bags as temporary water barriers, the bags need to be filled with mud and water. However, obtaining soil from the Qiantang River, where tides are high and waves fluctuate drastically, is extremely difficult. Using large maritime vessels could cause damage to the hull if they run aground due to insufficient draft during low tide, and the high rental costs make the process uneconomical. Using small eel fry catching vessels presents significant safety risks and does not meet the administrative approval requirements of the maritime authorities.

[0005] The Chinese patent, "A River Soil Excavation Frame and Soil Excavation Method," with application number 202210995891.3, describes a river soil excavation frame, comprising a traversable frame that begins above the embankment, crosses the embankment footing, and extends to the river surface. A soil excavation mechanism, mounted on the frame, includes a mud pump for sinking to the riverbed to extract soil. A pipeline, arranged along the frame and connected to the mud pump, is used to transport soil. A lifting device, mounted on the end of the frame away from the embankment, is connected to the mud pump and is used to control the raising and lowering of the mud pump. The mud pump in this structure is located at the front end of the soil excavation frame, and the structure extending from the frame is subject to tidal surges, posing a safety hazard. Furthermore, this technology extracts soil for embankment repair. Summary of the Invention

[0006] This invention primarily addresses the significant safety risks and high costs associated with existing technologies. It provides a rapid soil extraction structure and method for forming cofferdams in areas with strong tidal surges. The structure offers the advantages of compact structure, recyclability, safety, and efficiency. It also addresses the large amount of mud and water required for bag-and-tube cofferdams, effectively improving soil extraction efficiency while simultaneously desilting rivers.

[0007] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0008] A rapid earth-taking structure for forming cofferdams in strong tidal surge areas comprises a protective bank, a cofferdam construction area is provided outside the protective bank, tube bag partitions connected to the protective bank are provided on both sides of the cofferdam construction area, clay partitions are provided at the front ends of the tube bag partitions, a cofferdam is provided between the two clay partitions, and a cofferdam is formed by surrounding the protective bank, the tube bag partitions, the clay partitions and the cofferdam. A steel trestle fixed to the protective bank ground nails with bolts is erected on the cofferdam construction area, the steel trestle extends outside the cofferdam, and an earth-taking mechanism is provided on the steel trestle.

[0009] Preferably, the steel trestle comprises a plurality of steel pier frames, on which a truss bridge deck is laid and fixed with bolts to the steel pier frames.

[0010] Preferably, the soil-extracting mechanism includes a lifting mud pump assembly that rises and falls with the steel pier frame, a secondary mud pumping master pump is provided at the upper end of the rear part of the truss bridge deck, a mud delivery hose is provided between the secondary mud pumping master pump and the lifting mud pump assembly, and the rear end of the secondary mud pumping master pump is flange-connected with a mud and water output pipe, and the mud and water required by the pipe bag are delivered through the mud and water output pipe.

[0011] Preferably, the lifting mud pump assembly includes a submersible mud pump, a lifting guide rail welded and fixed to the steel pier frame as an integral unit is provided between the submersible mud pump and the steel pier frame, and a waterproof lifter is provided between the lifting guide rail and the submersible mud pump to drive the submersible mud pump to move up and down along the lifting guide rail.

[0012] Preferably, a mud suction rotating head is provided at the front end of the submersible mud pump, and a waterproof rotating motor is provided between the mud suction rotating head and the submersible mud pump.

[0013] Preferably, the submersible mud pumps are distributed on both sides of the steel pier frame and outside the frontmost steel pier frame; a hose guide frame which is sleeved with a mud delivery hose is provided on the upper part of the steel pier frame.

[0014] A soil-taking method for a rapid soil-taking structure for forming a cofferdam in a strong tidal surge area, comprising the following steps:

[0015] Step 1: When the tide recedes, first lay the steel pier frame with lifting guide rails in the middle of the cofferdam construction area, then gradually lay the truss bridge deck and fix it to the protective embankment, and install the secondary mud pump and mud and water output pipe.

[0016] Step 2: Install waterproof lifters on both sides of the steel pier frame after the truss bridge deck is laid, and simultaneously complete the installation of the submersible mud pump, waterproof rotary motor and mud suction rotary head.

[0017] Step 3: Connect the secondary mud pumping master pump to the installed submersible mud pump using a mud delivery hose, and ensure that the length of the mud delivery hose is sufficient for lifting and lowering.

[0018] Step 4: The lifting mud pump assembly in the cofferdam construction area is lowered into the silt by the waterproof lifter, the submerged mud pump and the waterproof rotary motor are turned on, the mud suction rotary head crushes the silt and sucks it into the mud and water output pipe for bagging.

[0019] Step 5: The tube bags filled with soil are stacked layer by layer to form a tube bag embankment, and then the clay waste from construction is piled up to form a clay embankment.

[0020] Step 6: Gradually complete the laying of all truss bridge decks and the installation of lifting mud pump components, and finally complete the stacking and forming of the dike cofferdam. The dike cofferdam is stacked layer by layer using tube bags.

[0021] Preferably, when the tide is falling, the lifting mud pump assembly is lowered to work, and when the tide begins to rise, the waterproof lifter lifts the lifting mud pump assembly to stop running, and the pit after the soil is taken is filled by the rising tide.

[0022] The present invention can achieve the following effects:

[0023] The present invention provides a rapid soil excavation structure and method for forming cofferdams in areas with strong tidal surges. Compared with existing technologies, this structure offers the advantages of compact structure, recyclability, safety, and efficiency. It solves the problem of large quantities of mud and water required for bag-and-tube cofferdams, effectively improving soil excavation efficiency while simultaneously desilting rivers.

[0024] The cofferdam construction area is formed by surrounding the protective embankment, pipe bag barrier, clay barrier and embankment cofferdam to protect the steel trestle and avoid the invasion of tidal surges. At the same time, the earth-moving mechanism can meet the needs of filling the pipe bags in the pipe bag barrier and embankment cofferdam with mud and water. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a schematic diagram of the top view of the soil taking mechanism of the present invention.

[0027] Figure 3 It is a side structural schematic diagram of the soil-taking mechanism of the present invention.

[0028] In the figure: protective embankment 1, bag-filled embankment 2, clay embankment 3, embankment cofferdam 4, steel trestle 5, earth-taking mechanism 6, cofferdam construction area 7, mud and water output pipe 8, secondary mud extraction main pump 9, lifting mud pump assembly 10, mud delivery hose 11, truss bridge deck 12, steel pier frame 13, hose guide frame 14, submerged mud pump 15, waterproof rotary motor 16, mud suction rotary head 17, waterproof lifter 18, lifting guide rail 19. DETAILED DESCRIPTION

[0029] The technical solution of the invention is further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0030] Example: Figure 1 、 Figure 2 and Figure 3 As shown, a rapid earth-taking structure for forming cofferdams in strong tidal surge areas includes a protective bank 1, a cofferdam construction area 7 disposed outside the protective bank 1, and tubular bag barrier dams 2 connected to the protective bank 1 on both sides of the cofferdam construction area 7. Clay barrier dams 3 are disposed at the front ends of the tubular bag barrier dams 2. A cofferdam 4 is disposed between the two clay barrier dams 3. The cofferdam construction area 7 is formed by the protective bank 1, tubular bag barrier dams 2, clay barrier dams 3, and cofferdam 4. A steel trestle 5 is erected above the cofferdam construction area 7 and is fixed to the protective bank 1 with ground bolts. The steel trestle 5 includes several steel pier frames 13, on which a truss bridge deck 12 is bolted and fixed to the steel pier frames 13. The steel trestle 5 extends beyond the cofferdam 4 and is provided with an earth-taking mechanism 6. The excavation mechanism 6 includes a lifting mud pump assembly 10 that rises and falls relative to the steel pier frame 13. A secondary mud pumping master pump 9 is located at the upper rear end of the truss bridge deck 12. A mud delivery hose 11 is interposed between the secondary mud pumping master pump 9 and the lifting mud pump assembly 10. A hose guide 14, which is connected to the mud delivery hose 11, is located above the steel pier frame 13. The rear end of the secondary mud pump 9 is flange-connected to a mud and water delivery pipe 8, which delivers the required mud and water to the pipe bag. The lifting mud pump assembly 10 includes submersible mud pumps 15, which are located on both sides of the steel pier frame 13 and on the outside of the frontmost steel pier frame 13. A lifting rail 19 is installed between the submerged mud pump 15 and the steel pier frame 13, which is integrally welded to the steel pier frame 13. A waterproof lifter 18 is installed between the lift rail 19 and the submerged mud pump 15 to drive the submerged mud pump 15 up and down along the lift rail 19. A mud suction rotary head 17 is installed at the front end of the submerged mud pump 15, and a waterproof rotary motor 16 is installed between the mud suction rotary head 17 and the submerged mud pump 15.

[0031] A soil-taking method for a rapid soil-taking structure for forming a cofferdam in a strong tidal surge area, comprising the following steps:

[0032] Step 1: When the tide recedes, first lay the steel pier frame 13 with lifting guide rails 19 in the middle section of the cofferdam construction area 7, then gradually lay the truss bridge deck 12 and fix it to the protective embankment 1, and install the secondary mud pump 9 and mud and water output pipe 8.

[0033] Step 2: Install waterproof lifters 18 on both sides of the steel pier frame 13 after the truss bridge deck 12 is laid, and simultaneously complete the installation of the submersible mud pump 15, waterproof rotary motor 16 and mud suction rotary head 17.

[0034] Step 3: Connect the secondary mud pumping master pump 9 to the installed submerged mud pump 15 using a mud delivery hose 11. The length of the mud delivery hose 11 should be sufficient for lifting;

[0035] Step 4: The lifting mud pump assembly 10 in the cofferdam construction area 7 is lowered into the silt by the waterproof lifter 18, the submerged mud pump 15 and the waterproof rotary motor 16 are turned on, and the mud suction rotary head 17 crushes the silt and sucks it into the mud and water output pipe 8 for bagging.

[0036] Step 5: The tube bags filled with soil are stacked layer by layer to form a tube bag embankment 2, and then the clay waste from construction is piled up to form a clay embankment 3.

[0037] Step 6: gradually complete the laying of all the truss bridge decks 12 and the installation of the lifting mud pump assembly 10, and finally complete the stacking and forming of the dike cofferdam 4. The dike cofferdam 4 is stacked layer by layer using tube bags.

[0038] When the tide is low, the lifting mud pump assembly 10 is lowered to work. When the tide begins to rise, the waterproof lifter 18 lifts the lifting mud pump assembly 10 to stop running, and the pit after the soil is taken is filled by the rising tide.

[0039] In summary, this rapid soil-collecting structure and method for forming cofferdams in areas with strong tidal surges offers the advantages of compactness, recyclability, safety, and efficiency. It solves the problem of large quantities of mud and water required for bag-and-soil cofferdams, effectively improving soil-collecting efficiency while simultaneously desilting rivers.

[0040] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in this field within the scope of the present invention are included in the patent scope of the present invention.

Claims

1. A rapid earth-taking structure for forming a cofferdam in a strong tidal surge area, comprising a protective embankment (1), characterized in that: A cofferdam construction area (7) is provided outside the protective bank (1), and tube bag partitions (2) connected to the protective bank (1) are provided on both sides of the cofferdam construction area (7), and clay partitions (3) are provided at the front ends of the tube bag partitions (2). A cofferdam (4) is provided between the two clay partitions (3). The cofferdam construction area (7) is formed by surrounding the protective bank (1), the tube bag partitions (2), the clay partitions (3) and the cofferdam (4). A steel trestle (5) connected and fixed to the protective bank (1) with ground bolts is erected on the cofferdam construction area (7), and the steel trestle (5) extends outside the cofferdam (4). A soil taking mechanism (6) is provided on the steel trestle (5); The steel trestle (5) comprises a plurality of steel pier frames (13), on which a truss bridge deck (12) is laid and fixedly connected to the steel pier frames (13) by bolts. The soil-extracting mechanism (6) includes a lifting mud pump assembly (10) that rises and falls relative to the steel pier frame (13); a secondary mud pumping master pump (9) is provided at the upper rear end of the truss bridge deck (12); a mud delivery hose (11) is provided between the secondary mud pumping master pump (9) and the lifting mud pump assembly (10); the rear end of the secondary mud pumping master pump (9) is flange-connected with a mud and water output pipe (8), and the mud and water required by the pipe bag is delivered through the mud and water output pipe (8); The lifting mud pump assembly (10) includes a submersible mud pump (15), a lifting guide rail (19) is provided between the submersible mud pump (15) and the steel bridge pier frame (13), and the lifting guide rail (19) is integrally welded and fixed to the steel bridge pier frame (13); a waterproof lifter (18) is provided between the lifting guide rail (19) and the submersible mud pump (15) to drive the submersible mud pump (15) to move up and down along the lifting guide rail (19); The submersible mud pumps (15) are distributed on both sides of the steel pier frame (13) and outside the frontmost steel pier frame (13); the upper part of the steel pier frame (13) is provided with a hose guide frame (14) which is sleeved with the mud delivery hose (11).

2. The rapid soil-taking structure for forming a cofferdam in a strong tidal surge area according to claim 1 is characterized in that: A mud suction rotating head (17) is provided at the front end of the submersible mud pump (15), and a waterproof rotating motor (16) is provided between the mud suction rotating head (17) and the submersible mud pump (15).

3. A soil-taking method for a rapid soil-taking structure for forming a cofferdam in a strong tidal surge area according to claim 2, characterized in that The steps are as follows: Step 1: When the tide recedes, a steel pier frame (13) with a lifting guide rail (19) is first laid in the middle of the cofferdam construction area (7), and then the truss bridge deck (12) is gradually laid and fixed to the protective embankment (1), and the secondary mud pump (9) and mud and water output pipe (8) are installed; Step 2: Install waterproof lifters (18) on both sides of the steel pier frame (13) on which the truss bridge deck (12) is laid, and simultaneously complete the installation of the submerged mud pump (15), the waterproof rotary motor (16) and the mud suction rotary head (17); Step 3: Connect the secondary mud pumping master pump (9) to the installed submerged mud pump (15) using a mud delivery hose (11), and ensure that the length of the mud delivery hose (11) is sufficient for lifting; Step 4: The lifting mud pump assembly (10) in the cofferdam construction area (7) is lowered into the silt by the waterproof lifter (18), the submerged mud pump (15) and the waterproof rotary motor (16) are turned on, and the mud suction rotary head (17) crushes the silt and sucks it into the mud and water output pipe (8) for bagging; Step 5: The tube bags filled with soil are stacked layer by layer to form a tube bag embankment (2), and then clay waste from construction is piled up to form a clay embankment (3); Step 6: gradually complete the laying of all the truss bridge decks (12) and the installation of the lifting mud pump assembly (10), and finally complete the stacking and forming of the dike cofferdam (4). The dike cofferdam (4) is stacked layer by layer using tube bags.

4. The soil-boring method for a rapid soil-boring structure for forming a cofferdam in a strong tidal surge area according to claim 3, characterized in that: When the tide is low, the lifting mud pump assembly (10) is lowered to work, and when the tide begins to rise, the waterproof lifter (18) lifts the lifting mud pump assembly (10) to stop running, and the pit after the soil is taken is filled by the rising tide.

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