Deepwater area gravel-cobble bottom cleaning system based on air compression and air lift technology

Abstract

The utility model provides a deep water area gravel-cobble bottom cleaning system based on an air compression and air lift technology, and aims to solve the problem that the consolidation degree and hardness of a riverbed soil body need to be high when a bridge project is constructed in a deep water area. A three-pipeline structure device with a gravel-cobble suction pipeline, a high-pressure air pumping pipeline and a high-pressure air disturbance pipeline is designed, and the structure device combining the high-pressure air pumping pipeline and the high-pressure air disturbance pipeline is adopted, namely, the high-pressure air disturbance pipeline is used for conducting crushing and loosening treatment on the gravel-cobble of the riverbed; the high-pressure air pumping-in pipeline forms a negative pressure area at the gravel-cobble suction inlet, air rises, so that water flow carries loose gravel-cobble to be discharged out of the steel cofferdam from the gravel-cobble discharge outlet, the efficiency of sucking rock and soil substances on the surface of a riverbed is greatly improved, the working efficiency is greatly improved, the construction period is shortened, and the construction cost is reduced. And the construction cost is obviously reduced.

Description

Technical Field

[0001] The utility model design belongs to the field of building construction, and specifically relates to a device for removing gravel in a deep water area inside a steel cofferdam during the construction of a bridge structure of a bridge project. Background Art

[0002] At present, more and more bridge construction projects in my country involve deep and complex environments. In order to ensure the normal progress of construction, it is necessary to use steel cofferdams to fence off the construction area and create a waterless construction environment. In order to prevent cracking and leakage after the bottom concrete is poured, the pebbles and gravels at the bottom of the deep riverbed need to be cleaned after the temporary construction structure of the steel cofferdam is lowered. However, the common riverbed sediment cleaning devices are only suitable for shallow water depths and silt soil layers. It is difficult to clean pebbles and gravels with large hardness and particle size in deep water areas. In addition, the structure is complex, and the manufacturing and operation costs are high. Summary of the invention

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a deep-water gravel bottom cleaning system based on compressed air lift technology, which can be used for riverbed dredging work at a greater depth and has the characteristics of high cleaning efficiency and fast speed.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A deep-water gravel bottom cleaning system based on compressed air lift technology comprises a gravel suction pipeline, a high-pressure air pumping pipeline and a high-pressure air disturbance pipeline.

[0006] The pebble gravel suction pipe comprises a pebble gravel suction port and a pebble gravel discharge port. The pebble gravel suction port is arranged in the steel cofferdam structure and extends to the riverbed surface to connect with the riverbed surface. The pebble gravel discharge port is located outside the steel cofferdam structure.

[0007] The upper end of the high-pressure air pumping pipe is provided with a high-pressure air inlet connected to the air compressor, and the lower end is provided with a high-pressure air outlet. The lower end of the high-pressure air pumping pipe is inserted into the gravel suction pipe and the high-pressure air outlet is located at or close to the gravel suction port.

[0008] The high-pressure air disturbance duct is arranged outside the gravel suction duct, the upper end of the high-pressure air disturbance duct is provided with a disturbance air inlet connected to an air compressor, and the lower end is provided with a disturbance air outlet, the disturbance air outlet is arranged on the riverbed surface for loosening the gravel on the riverbed surface. The high-pressure air disturbance duct has a high-pressure air disturbance duct outer wall extending downward, a disturbance air outlet outer wall located at the lower end and extending downward while expanding outward, and a spoiler plate longitudinally arranged in the high-pressure air disturbance duct, the spoiler plate has a tail portion contracting downward and inward at the lower end, thereby forming at least one high-pressure air collecting port in the disturbance air outlet, and the diameter of the high-pressure air collecting port is smaller than the diameter of the high-pressure air disturbance duct.

[0009] During construction, high-pressure air enters the high-pressure air disturbance pipe and flows to the disturbance air outlet under the guidance of the disturbance plate. The high-pressure air forms a high-speed airflow through the high-pressure air collecting port with a gradually decreasing cross-section. The formed high-speed airflow flushes and blows the pebbles and gravels at the bottom of the riverbed at the disturbance air outlet to loosen the pebbles and gravels. The air compressor pumps high-pressure air into the pipeline to create a negative pressure area at the gravel suction port. The rising air causes the water flow to carry the loosened gravel and be discharged from the gravel discharge port along the gravel suction pipeline to the outside of the steel cofferdam.

[0010] Preferably, the spoiler has at least two groups of tail portions contracting downward and inward so as to form at least two high-pressure air collecting ports in the disturbed air outlet.

[0011] The utility model proposes a deep-water gravel bottom cleaning system based on compressed air lift technology. Aiming at the problems of high consolidation degree and hardness of riverbed soil that need to be faced during the construction of bridge projects in deep-water areas, the system is designed to be a three-pipeline structural device with a gravel suction pipeline, a high-pressure air pumping pipeline and a high-pressure air disturbance pipeline. The structural device adopts a combination of the high-pressure air pumping pipeline and the high-pressure air disturbance pipeline, that is, a high-speed air flow is first formed by a high-pressure air collecting port to crush and loosen the riverbed gravel, and then the high-pressure air pumping pipeline creates a negative pressure zone at the gravel suction port. The rising air causes the water flow to carry the loosened gravel and be discharged from the gravel discharge port to the outside of the steel cofferdam, thereby greatly improving the efficiency of absorbing rock and soil materials on the riverbed surface, thereby greatly improving work efficiency, reducing the construction period, and thus significantly reducing construction costs.

[0012] The utility model proposes a deep-water gravel bottom cleaning system based on compressed air lifting technology. Due to the adoption of the above technical scheme, it has a simple structure, is portable and durable compared with the prior art, can meet the bottom cleaning needs of temporary construction structures in bridge projects, and can effectively promote the research and development of deep-sea bridge foundation construction technology; the manufacturing and maintenance costs are low, the operation is convenient, and the operation is stable, reliable and durable.

[0013] The pebble gravel suction pipeline includes: a pebble gravel main transport pipeline extending into the riverbed surface and a pebble gravel secondary transport pipeline arranged transversely and crossing the steel cofferdam structure, and the pebble gravel secondary transport pipeline is connected with the pebble gravel main transport pipeline. Preferably, the connection between the pebble gravel main transport pipeline and the pebble gravel secondary transport pipeline forms a connection angle of 90°.

[0014] Furthermore, a reinforcing member is provided at the connection angle formed by the connection of the main gravel transport pipe and the secondary gravel transport pipe. As an optional embodiment, the reinforcing member can be a strut, one end of which is fixed to the main gravel transport pipe and the other end is fixed to the secondary gravel transport pipe.

[0015] Furthermore, the pebble main transport pipeline and the pebble auxiliary transport pipeline are equipped with lifting rings, which facilitates the placement of the deep-water pebble bottom cleaning system based on compressed air lift technology at a required position by a crane through a steel cable during operation.

[0016] Preferably, the diameter of the high-pressure air disturbance pipe is smaller than the diameter of the pebble suction pipe.

[0017] Preferably, the high-pressure air disturbance duct is arranged along the outside of the gravel suction duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of a preferred embodiment of a deep-water gravel bottom cleaning system based on air compression and gas lifting technology.

[0019] Figure 2 for Figure 1 A schematic structural diagram of the high-pressure air disturbance duct of the illustrated embodiment.

[0020] Figure markings: 1-pebble suction pipe; 2-high-pressure air pumping pipe; 3-high-pressure air disturbance pipe; 301-outer wall of high-pressure air disturbance pipe; 302-outer wall of disturbance air outlet; 303-air compressor connection port; 304-high-pressure air collecting port; 305-disturbance plate; 4-reinforcement support rod; 5-lifting ring; 6-pebble suction port; 7-pebble discharge port; 8-high-pressure outlet; 9-high-pressure inlet; 10-disturbance air inlet; 11-disturbance air outlet; 12-pebble main transport pipe; 13-pebble secondary transport pipe. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the embodiments are not intended to limit the present invention, and any similar structure and similar changes of the present invention should be included in the protection scope of the present invention.

[0022] As shown in the figure, the deep-water gravel bottom cleaning system based on compressed air lift technology comprises: a gravel suction pipeline 1, a high-pressure air pumping pipeline 2 and a high-pressure air disturbance pipeline 3.

[0023] The pebble gravel suction pipe 1 extends from the riverbed surface to the outside of the steel cofferdam structure, and a pebble gravel suction port 6 is provided at the port at one end located at the riverbed surface, and the pebble gravel suction port 6 extends to the riverbed surface and connects with the riverbed surface, and the port at the other end located outside the steel cofferdam structure is set as a pebble gravel discharge port 7. The pebble gravel suction pipe 1 includes a pebble gravel main transport pipe 12 extending into the riverbed surface and a pebble gravel secondary transport pipe 13 arranged transversely and crossing the steel cofferdam structure, and the pebble gravel secondary transport pipe 13 is connected to the pebble gravel main transport pipe 12. In this embodiment, the connection between the pebble gravel main transport pipe 12 and the pebble gravel secondary transport pipe 13 forms a connection angle of about 90°, and a support rod 4 is provided at the connection angle as a reinforcing member. One end of the support rod 4 is fixed on the pebble gravel main transport pipe 12, and the other end is fixed on the pebble gravel secondary transport pipe 13, forming a stable triangular structure. A lifting ring 5 is also installed on the pebble gravel main transport pipe 12 and the pebble gravel secondary transport pipe 13.

[0024] One end of the high-pressure air pumping pipe 2 is set as a high-pressure air outlet 8, the high-pressure air outlet 8 is inserted into the interior of the gravel suction pipe 1 and is located at the gravel suction port 6, and the port at the other end of the high-pressure air pumping pipe 2 is set as a high-pressure air inlet 9, and the high-pressure air inlet 9 is connected to an air compressor (not shown in the figure).

[0025] The diameter of the high-pressure air disturbance pipe 3 is smaller than the diameter of the pebble suction pipe 1. As shown in the figure, the high-pressure air disturbance pipe 3 is arranged outside the pebble suction pipe 1 along the outside of the pebble suction pipe 1, and the port at one end located at the riverbed surface is set as a disturbance air outlet 11 for loosening the pebbles on the riverbed surface, and the port at the other end is set as a disturbance air inlet 10. Figure 2 As shown, the high-pressure air disturbance duct 3 has a high-pressure air disturbance duct outer wall 301 extending downward, a disturbance air outlet outer wall 302 located at the lower end and extending downward while expanding outward, and a spoiler plate 305 longitudinally arranged in the high-pressure air disturbance duct 3. As shown in the figure, the spoiler plate 305 has a tail portion that contracts downward and inward at the lower end, thereby forming at least two high-pressure air collecting ports 304 in the disturbance air outlet 11, and the diameter of the high-pressure air collecting ports 304 is much smaller than the diameter of the high-pressure air disturbance duct 3, so that a high-speed airflow can be formed when the high-pressure airflow flows through the high-pressure air collecting ports 304. The disturbance air inlet 10 also has an air compressor connection port 303 for connecting an air compressor.

[0026] After the steel cofferdam sheet pile structure of the bridge project is driven in and temporarily fixed on the top, the deep-water gravel bottom cleaning device using the compressed air lift technology in this embodiment begins the riverbed slag cleaning work. The operation includes the following steps:

[0027] The first step: using a crane to connect to the lifting ring 5 of the gravel bottom cleaning device through a steel cable to perform lifting work, so that the gravel secondary transport pipeline 13 is parallel to the horizontal plane, and the gravel main transport pipeline 12 is placed perpendicular to the riverbed surface.

[0028] Step 2: lower the gravel bottom cleaning device and ensure that the gravel suction port 6 is placed on the riverbed.

[0029] Step 3: Connect the air compressor to the disturbed air inlet 10, the high-pressure air enters the high-pressure air disturbance pipe 3, and forms a high-speed airflow at the high-pressure air collecting port 304 in the disturbed air outlet 11, which scours the gravel on the riverbed surface and breaks it.

[0030] Step 4: connect the air compressor to the high-pressure air inlet 9, pump the high-speed and high-pressure gas into the pipeline 2 through the high-pressure air pump and transport it to the gravel suction port 6, so that a high-pressure air bag is formed inside the gravel suction port 6.

[0031] Step 5: During the rising process of the high-pressure airbag, a negative pressure environment is formed in the gravel suction pipe 1, and the water flow carries the sediment from the gravel suction pipe 1 and moves through the gravel discharge port 7 to the outside of the steel cofferdam.

[0032] Step 6: Repeat the above steps 1 to 5, and move the gravel bottom cleaning device to dredge the riverbed inside the cofferdam to be cleaned.

[0033] The above description is only a description of the preferred embodiment of the utility model, and does not limit the scope of the utility model. Any changes or modifications made by any ordinary technician familiar with the field based on the technical content disclosed above should be regarded as equivalent effective embodiments and fall within the scope of protection of the technical solution of the utility model.

Claims

1. A deep-water gravel bottom cleaning system based on compressed air lift technology, characterized in that: include: The pebble and gravel suction pipe (1) comprises a pebble and gravel suction port (6) and a pebble and gravel discharge port (7), wherein the pebble and gravel suction port (6) is arranged in the steel cofferdam structure and extends to the riverbed surface and connects with the riverbed surface, and the pebble and gravel discharge port (7) is located outside the steel cofferdam structure; A high-pressure air pumping pipe (2) is provided with a high-pressure air inlet (9) connected to an air compressor at its upper end and a high-pressure air outlet (8) at its lower end, the lower end of the high-pressure air pumping pipe (2) being inserted into the pebble suction pipe (1) so that the high-pressure air outlet (8) is located at or close to the pebble suction port (6); and A high-pressure air disturbance pipe (3) is arranged outside the pebble suction pipe (1); the upper end of the high-pressure air disturbance pipe (3) is provided with a disturbance air inlet (10) connected to an air compressor, and the lower end is provided with a disturbance air outlet (11); the disturbance air outlet (11) is arranged on the riverbed surface and is used to loosen the pebbles on the riverbed surface; the high-pressure air disturbance pipe (3) comprises a high-pressure air disturbance pipe outer wall (301) extending downward, a disturbance air outlet outer wall (302) located at the lower end and continuing to extend downward while expanding outward, and a disturbance plate (305) longitudinally arranged in the high-pressure air disturbance pipe (3); the disturbance plate (305) has a tail portion that contracts downward and inward at the lower end, thereby forming at least one high-pressure air collecting port (304) in the disturbance air outlet (11); the diameter of the high-pressure air collecting port (304) is smaller than the diameter of the high-pressure air disturbance pipe (3).

2. The deep water gravel bottom cleaning system according to claim 1, characterized in that: The spoiler plate (305) has at least two groups of tail portions that contract downward and inward, thereby forming at least two high-pressure air collecting ports (304) in the disturbed air outlet (11).

3. The deep water gravel bottom cleaning system according to claim 1, characterized in that: The pebble and gravel suction pipeline (1) comprises: a pebble and gravel main transport pipeline (12) extending into the riverbed surface and a pebble and gravel secondary transport pipeline (13) arranged transversely and crossing the steel cofferdam structure, wherein the pebble and gravel secondary transport pipeline (13) is interconnected with the pebble and gravel main transport pipeline (12).

4. The deep water gravel bottom cleaning system as claimed in claim 3, characterized in that: The connection between the pebble and gravel main transport pipeline (12) and the pebble and gravel auxiliary transport pipeline (13) forms a connection angle of 90°.

5. The deep water gravel bottom cleaning system according to claim 3 or 4, characterized in that: A reinforcing member (4) is provided at a connection angle formed at the connection of the pebble and gravel main transport pipeline (12) and the pebble and gravel auxiliary transport pipeline (13).

6. The deep water gravel bottom cleaning system as claimed in claim 5, characterized in that: The reinforcing member (4) is a support rod, one end of which is fixed to the pebble and gravel main transport pipe (12), and the other end of which is fixed to the pebble and gravel secondary transport pipe (13).

7. The deep water gravel bottom cleaning system as claimed in claim 3, characterized in that: The main pebble transport pipeline (12) and the secondary pebble transport pipeline (13) are provided with lifting rings (5).

8. The deep water gravel bottom cleaning system as claimed in claim 1, characterized in that: The diameter of the high-pressure air disturbance pipe (3) is smaller than the diameter of the pebble suction pipe (1).

9. The deep water gravel bottom cleaning system according to claim 1, characterized in that: The high-pressure air disturbance pipe (3) is arranged along the outer side of the gravel suction pipe (1).

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