CN107587497A - A kind of method for improving hydraulic reclamation flatness - Google Patents

Abstract

The invention provides a kind of method for improving hydraulic reclamation flatness, comprise the following steps：Hydraulic reclamation region laying hydraulic reclamation pipe is being treated, and sinker is installed in the hydraulic reclamation pipe end；Under hydraulic reclamation pipe not swing state, obtain hydraulic reclamation pipe tube head and hydraulic reclamation pipe tube head can the distance between coverage boundary point, hydraulic reclamation pipe tube head and hydraulic reclamation pipe tube head can be between coverage boundary point between line and hydraulic reclamation tube head axis angle and hydraulic reclamation pipe tube head axis and Temporary Cofferdam between vertical range, calculate the swing angle for obtaining hydraulic reclamation pipe；Based on the swing angle of hydraulic reclamation pipe, hydraulic reclamation area is filled.A kind of method of raising hydraulic reclamation flatness of the present invention, by setting up sinker on hydraulic reclamation pipe, to improve the diffusion area of hydraulic reclamation pipe, mouth of pipe impulse force is reduced, so as to play accurate control hydraulic reclamation area absolute altitude, improve the purpose of hydraulic reclamation flatness.

Description

A Method of Improving the Levelness of Blow Filling

technical field

The invention relates to the technical field of water conservancy engineering, in particular to a method for improving the levelness of dredging and filling.

Background technique

With the continuous deepening of my country's reform and opening up and the rapid development of social economy, in densely populated and economically developed coastal areas, especially coastal ports, the demand for land is increasing, and reclamation projects are increasing, and dredging reclamation is gradually being widely used. among these projects. Now more and more dredging reclamation technologies are being used for land reclamation, port area development, and site construction. After dredging, it is necessary to carry out a series of construction projects such as post-loading and preloading on the sand surface of dredging, so the flatness of dredging plays a vital role in the later construction.

There are generally hydraulic methods and mechanical leveling methods for controlling the flatness of dredged reclamation areas. The hydraulic method means that during the construction, the flow direction and flow velocity of the mud are reasonably controlled through the mud-carrying ability of the water flow, so that the final flatness meets the design and specification requirements. The mechanical method mainly uses excavators, bulldozers, dump trucks, etc. to carry out secondary transportation in the dredging reclamation area, and transport the soil from the position with high elevation to the position with insufficient elevation, so as to achieve the purpose of leveling the site and controlling the flatness of dredging and filling. For a dredging reclamation project, the dredging reclamation area can be several square kilometers, and it is uneconomical to rely on mechanical leveling, and it is greatly restricted by the conditions of the construction site.

In some reef dredging and reclamation projects, the lower layer of the sedimentation tank in the reclamation area is fine sand, and its elevation is close to the design elevation. The area is small and cannot meet the needs of the project.

Contents of the invention

The invention provides a method for improving the levelness of blow-filling, so as to solve the technical problems of low levelness and low accuracy of blow-filling in the existing blow-filling method.

According to one aspect of the present invention, there is provided a method for improving the levelness of dredging and filling, comprising the following steps:

S1. Arrange blowing and filling pipes in the area to be blown and filled, and install an energy dissipator at the end of the blowing and filling pipes;

S2. In the state where the blowing and filling pipe is not swinging, obtain the distance between the head of the blowing and filling pipe and the boundary point of the range that the head of the blowing and filling pipe can cover, the distance between the head of the blowing and filling pipe and the boundary point of the blowing and filling pipe Calculate and obtain the swing angle of the blow-fill pipe by calculating the angle between the line between the boundary points of the pipe head and the axis of the blow-fill pipe head and the vertical distance between the pipe head axis of the blow-fill pipe and the temporary cofferdam ;

S3. Based on the swing angle of the blow-fill pipe, fill the blow-fill area.

Preferably, on the basis of the above solution, the step S1 further includes: installing a rubber swing pipe at the end of the energy dissipator of the blow-fill pipe.

Preferably, on the basis of the above solution, the swing angle of the rubber swing tube is 0° to 90°.

Preferably on the basis of the above scheme, the mathematical calculation formula of the step S2 is:

α=arcsin(Lb/La)-β;

Wherein, La represents the distance between the nozzle head of the blow-fill pipe and the boundary point of the coverable range of the head of the blow-fill pipe, and β represents the boundary point of the coverable range between the head of the blow-fill pipe and the head of the blow-fill pipe The angle between the line connecting the points and the axis of the blow-fill pipe head, Lb represents the vertical distance between the head axis of the blow-fill pipe and the temporary cofferdam, and α represents the swing angle of the blow-fill pipe.

Preferably on the basis of the above scheme, the blow-fill pipe is a rubber self-floating pipe.

A method for improving the flatness of blow-fill according to the present invention, by adding an energy dissipator on the blow-fill pipe, to increase the diffusion area of the blow-fill pipe and reduce the impulse force of the nozzle, so as to accurately control the elevation of the blow-fill area and improve The purpose of blow fill levelness.

Another advantage of the present invention is that the present invention can also accurately obtain the required swing angles of the blow-fill pipes in different areas to be filled according to the distance between the head of the blow-fill pipe and the area to be filled, so as to further precisely control The flatness and elevation of the reclamation area.

Description of drawings

Fig. 1 is a kind of process block diagram of the method for improving blow-fill levelness of the present invention;

Fig. 2 is a schematic diagram of a method for improving the flatness of blow filling of the present invention;

Fig. 3 is a structural schematic diagram of the energy dissipator of the present invention.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

It should be noted that a method of improving the levelness of dredging and filling according to the present invention is based on floating temporary cofferdams, wherein the floating temporary cofferdams include floating breakwaters, inner weirs and reverse flow weirs, floating The vertical breakwater and the anti-reflux weir are arranged vertically to form an L-shaped fence. The inner barrier weir is installed outside the anti-reflux weir in parallel with the floating breakwater, and the anti-reflux weir is equipped with a blow-fill pipe, which passes through the anti-reflux weir. Extending to one side of the floating breakwater, and the floating breakwater is spliced by rubber self-floating pipes

When in use, firstly, according to the area to be filled, the floating temporary cofferdam is installed in the direction of the boundary of the filling and fixed, and then the filling area is blown and filled through the technical scheme of the present invention.

In order to further describe the technical solution of the present invention in detail, please refer to Fig. 1, the present invention provides a method for improving the levelness of blowing and filling, comprising the following steps:

S1. Arrange the blow-fill pipe in the area to be blow-filled, and install an energy dissipator at the end of the blow-fill pipe to reduce the flow rate of the blow-fill material at the head of the pipe, prevent erosion, and make the blow-fill material evenly scattered in the blow-fill area ;

S2. In the state where the blow-fill pipe does not swing, measure to obtain the distance between the head of the blow-fill pipe and the boundary point of the coverage area of the head of the blow-fill pipe, and the coverable range of the head of the blow-fill pipe and the head of the blow-fill pipe Calculate the swing angle of the blow-fill pipe from the angle between the line between the boundary points and the axis of the blow-fill pipe head and the vertical distance between the head axis of the blow-fill pipe and the temporary cofferdam;

S3. According to the calculated swing angle of the blow-fill pipe, adjust the swing angle of the blow-fill pipe to fill the blow-fill area.

In the present invention, an energy dissipator is installed at the head of the blow-fill pipe, and the energy dissipator is used to control the flow rate of the blow-fill material, and through detection and calculation, to obtain the swing angle of the blow-fill pipe, according to the swing angle of the blow-fill pipe, To fill the dredging filling area, so as to prevent the problem of too high filling height caused by too small swing angle or too low filling height caused by too large swing angle, so as to ensure the flatness of blown filling and improve its construction efficiency. Wherein, please refer to Fig. 3 for the structure of the energy dissipator.

In another preferred embodiment of the present invention, step S1 of the present invention also includes: installing a rubber swing tube at the end of the energy dissipator of the blow-fill tube, and further increasing the swing angle of the blow-fill tube through the rubber swing tube, so that not only Enlarging the blowing filling area, improving its construction efficiency, and due to the characteristics of the rubber swing pipe, it can effectively improve the flatness of the blowing filling area. Preferably, the swing angle of the rubber swing tube of the present invention is 0° to 90°.

Please continue to refer to shown in Figure 2, the mathematical calculation formula of step S2 of the present invention is:

α=arcsin(L _b /L _a )-β;

Wherein, L _a represents the distance between the head of the blowing and filling pipe and the boundary point of the coverage of the head of the blowing and filling pipe, and β represents the covering range between the head of the blowing and filling pipe and the head of the blowing and filling pipe The angle between the line between the boundary points and the axis of the blow-fill pipe head, L _b represents the vertical distance between the head axis of the blow-fill pipe and the temporary cofferdam, and α represents the swing angle of the blow-fill pipe .

It is worth noting that the blow-fill pipe of the present invention is a rubber self-floating pipe, and the layout of the blow-fill pipe is divided into the laying of pipelines on water and the laying of land pipelines.

Among them, the laying of pipelines on water should determine a reasonable pipeline connection method according to the natural conditions of the construction site, so as to prevent construction accidents of broken pipes when there are strong winds and waves. The blow-fill pipes for the fixed pipe sections on the water mostly use self-floating pipes, or steel pipes are indirectly connected with flexible pipes, and the steel pipe sections are carried by double-body platforms and fixed with pipeline anchors. Immersed tubes can be used in special cases. Floating pipes on water are generally assembled into segments first, and the segment length is preferably 150-160m. The construction anchors should be arranged properly while assembling the floating pipe sections above water. Then each section of floating pipe on the water is towed to the construction area and placed in place, usually starting from the immersed pipe head or the water shelf head and docking sequentially.

Floating pipes in sea areas or tidal river sections are generally carried out using high and low tides. The method is as follows: firstly connect the floating pipe with the head of the onshore mud discharge pipe or fix it in the mud discharge area; then connect the other end of the floating pipe with the stern pipe of the dredger; Or the top of the anchor boat floats along the water pipe, and the pipe anchors in the direction of rising and falling tides are set in time.

The layout of land-based dredging-fill pipelines includes two parts: land-based dredging-fill pipes and water-land pipe racks. There are two ways to connect land-water pipelines: one is to directly connect with the hoses of the water-based dredging-fill pipes, and the other is to erect pipe racks or platforms in the middle. connect.

In the process of laying out the dredging and filling pipe fibers, it is necessary to arrange the land dredging and filling pipes as much as possible, and reduce the laying of the dredging and filling pipes on the water, so as to reduce the hydraulic loss of the mud discharge pipes on the water.

A method for improving the flatness of blow-fill according to the present invention, by adding an energy dissipator on the blow-fill pipe, to increase the diffusion area of the blow-fill pipe and reduce the impulse force of the nozzle, so as to accurately control the elevation of the blow-fill area and improve The purpose of blow fill levelness.

Another advantage of the present invention is that the present invention can also accurately obtain the required swing angles of the blow-fill pipes in different areas to be filled according to the distance between the head of the blow-fill pipe and the area to be filled, so as to further precisely control The flatness and elevation of the reclamation area.

Finally, the method of the present application is only a preferred embodiment, and is not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. A method for improving the flatness of blow-fill, is characterized in that, comprises the following steps: S1. Arrange blowing and filling pipes in the area to be blown and filled, and install an energy dissipator at the end of the blowing and filling pipes; S2. In the state where the blowing and filling pipe is not swinging, obtain the distance between the head of the blowing and filling pipe and the boundary point of the range that the head of the blowing and filling pipe can cover, the distance between the head of the blowing and filling pipe and the boundary point of the blowing and filling pipe Calculate and obtain the swing angle of the blow-fill pipe by calculating the angle between the line between the boundary points of the pipe head and the axis of the blow-fill pipe head and the vertical distance between the pipe head axis of the blow-fill pipe and the temporary cofferdam ; S3. Based on the swing angle of the blow-fill pipe, fill the blow-fill area. 2. A kind of method for improving the levelness of blow-filling as claimed in claim 1, is characterized in that, described step S1 also comprises: A rubber swing pipe is installed at the end of the energy dissipator of the blow-fill pipe. 3. A method for improving the levelness of blowing and filling according to claim 2, characterized in that, the swing angle of the rubber swing tube is 0° to 90°. 4. a kind of method for improving the levelness of dredging and filling as claimed in claim 1, is characterized in that, the mathematical calculation formula of described step S2 is: α=arcsin(L _b /L _a )-β; Wherein, L _a represents the distance between the head of the blowing and filling pipe and the boundary point of the coverage of the head of the blowing and filling pipe, and β represents the covering range between the head of the blowing and filling pipe and the head of the blowing and filling pipe The angle between the line between the boundary points and the axis of the blow-fill pipe head, L _b represents the vertical distance between the head axis of the blow-fill pipe and the temporary cofferdam, and α represents the swing angle of the blow-fill pipe . 5. A method for improving the levelness of blow-fill as claimed in claim 1, wherein the blow-fill pipe is a rubber self-floating pipe.