Artificial sea reclamation land foundation anti-erosion settlement treatment method

Abstract

The invention discloses an anti-erosion settlement treatment method for an artificial sea reclamation land foundation, which comprises the following steps of: S1, surveying and setting out a cofferdam, and constructing the cofferdam by adopting a water-erosion-resistant building material; s2, hydraulic reclamation sand construction is adopted, so that the site in the cofferdam reaches the hydraulic reclamation height, and then the site is flattened through a compactor; s3, according to a measurement result, a drainage plate is installed on the site, and the drainage plate is vertically arranged in a hole; s4, a drainage pipe is installed, all the drainage plates are communicated through the drainage pipe, the drainage pipe is connected with a vacuum pump, and the vacuum pump is debugged; s5, a layer of non-woven fabric is laid on the drainage pipe, and 2-4 layers of sealing films are laid on the non-woven fabric; s6, a groove is dug in the periphery of the site, a sealing film is laid along the bottom of the groove, then rock soil backfilling is adopted to form a cofferdam, and sealing treatment is conducted; s7, the vacuum pump starts to exhaust air; and S8, laying a protective layer on the sealing film. Compared with the prior art, the problem that an artificial sea reclamation land foundation is poor in erosion and settlement resistance can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of land reclamation, and in particular to a method for treating the anti-erosion and subsidence of an artificial land reclamation foundation. Background Art

[0002] In order to facilitate urban development and provide more usable land for urban construction and industrial production areas, the coastline is pushed further forward through artificial construction, alleviating the tension in urban land and ensuring the beauty of the coastline.

[0003] At present, land reclamation is mainly used for construction, so the foundation strength and stability are required to be high. The foundation of land reclamation is easily eroded by seawater due to the fast filling speed, short consolidation time and high water content. The traditional methods of land reclamation foundation treatment mainly include: strong tamping method, drainage consolidation method, vibration compaction method, cement mixing method, etc. The drainage consolidation method is commonly used in engineering, which mainly includes plastic drainage board drainage method and sand well method. Due to the low permeability and durability of the plastic drainage board material, the expected effect cannot be achieved. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of poor erosion and settlement resistance of existing artificial land reclamation foundations, and to provide an anti-erosion and settlement treatment method for artificial land reclamation foundations.

[0005] In order to achieve the above-mentioned object, the present invention provides a method for treating erosion and settlement of artificial land reclamation foundation, which comprises:

[0006] S1. Measure and lay out the cofferdam, and use water-resistant building materials to build the cofferdam;

[0007] S2. Use blown sand filling to make the site inside the cofferdam reach the blown sand filling height, and use a soil compactor to flatten the site;

[0008] S3. Install drain boards on site according to the measurement results, with the drain boards arranged vertically in holes;

[0009] S4, installing a drain pipe, the drain pipe connects all the drain boards, the drain pipe is connected to a vacuum pump, and the vacuum pump is debugged;

[0010] S5. Lay a layer of non-woven fabric on the drain pipe, and lay 2 to 4 layers of sealing film on the non-woven fabric;

[0011] S6. Dig trenches around the site, lay the sealing membrane along the bottom of the trench, backfill with rock and soil to form a cofferdam, and perform sealing treatment;

[0012] S7, the vacuum pump starts to pump air;

[0013] S8. Laying a protective layer on the sealing membrane, and at the same time gradually piling up filling soil on the protective layer, and pre-pressing for a certain period of time.

[0014] As a further description of the above technical solution:

[0015] In the step S3, the drainage board is injected into the foundation by a board inserting machine.

[0016] As a further description of the above technical solution:

[0017] The drainage plate includes a fixed plate, a movable plate and a filter membrane. The fixed plate is provided with a mounting through hole. The movable plate is movably connected in the mounting through hole. The dredging rod on the movable plate passes through the fixed plate and the filter membrane. The filter membrane covers the outer surface of the fixed plate. The fixed plate is provided with a plurality of through holes.

[0018] As a further description of the above technical solution:

[0019] A plurality of protrusions are arranged on the surface of the fixing plate, and gaps are left between the plurality of protrusions.

[0020] As a further description of the above technical solution:

[0021] A plurality of first mounting grooves are arranged on the fixed plate, the first mounting grooves are communicated with the mounting through holes, a spring is arranged in the first mounting groove, and one end of the spring is connected to the movable plate.

[0022] As a further description of the above technical solution:

[0023] The dredging rod has a diameter-changing section, and the diameter-changing section passes through the fixing plate.

[0024] As a further description of the above technical solution:

[0025] The blowing and filling in step S2 includes the following steps:

[0026] S21, performing a blow-fill operation inside the cofferdam to form a first blow-fill layer;

[0027] S22, a first elastic fixed grid is provided in the first blow filling layer;

[0028] S23, adding a curing agent to the first blow-fill layer;

[0029] S24, repeat the above steps until the filling is completed.

[0030] As a further description of the above technical solution:

[0031] Second elastic fixed grids are arranged between the first elastic fixed grids, the first elastic fixed grids are arranged horizontally, and the second elastic fixed grids are arranged vertically.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 1. In the present invention, the cofferdam is built with water-resistant building materials, so that the ability to resist seawater erosion and scouring can be increased. During filling, layered filling is carried out, and a first elastic fixed grid is arranged in each filling layer to improve the overall strength. At the same time, a curing agent is added to the filling layer to promote the consolidation of the filled material, further improving the strength of the foundation. The first elastic fixed grids are connected by the second elastic fixed grids, so that the first elastic fixed grids can be connected into a whole, thereby improving the anti-settling performance.

[0034] 2. In the present invention, after vacuuming, the vacuum pressure directly acts on the water vapor fluid in the sand cushion layer, forming a pressure difference between the lower soil and the sand cushion layer, so that the water and gas in the surface soil are pumped out through the drainage pipe connected to the vacuum pump under the action of the pressure difference, and then in the water channel drainage plate, so that the water and gas in the deep soil are pumped out. During the whole process, negative excess pore water pressure is generated in the soil. With the discharge of water vapor, the excess pore water pressure continues to dissipate, and the effective stress of the soil continues to increase, so that the soil is reinforced.

[0035] 3. In the present invention, the drain plate is composed of a fixed plate, a movable plate and a filter membrane. When vacuum is drawn, negative pressure is generated. At the same time, under the action of water flow, the spring is compressed, and the movable plate can move a short distance relative to the drain plate, thereby moving the dredging rod. This can cause the water body to fluctuate, making it easier for the water to enter the drain plate from the filter membrane. At the same time, it can also loosen the filling material to facilitate the water to flow to the drain plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 The present invention is a structural schematic diagram of a method for treating erosion and settlement of an artificial land-reclamation foundation.

[0038] Figure 2 The present invention is a schematic diagram of the drainage board structure in a method for treating erosion and settlement of artificial land reclamation foundation.

[0039] Figure 3The present invention is a schematic diagram of the connection structure of a first elastic fixed grid and a second elastic fixed grid in a method for treating anti-erosion and settlement of an artificial land reclamation foundation.

[0040] Legend:

[0041] 1. Fixed plate; 2. Movable plate; 3. Filter membrane; 4. Mounting through hole; 5. Clearing rod; 6. Protrusion; 7. Spring; 8. First elastic fixed grid; 9. Second elastic fixed grid. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figure 1-3The present invention provides a method for treating erosion and settlement of artificial land reclamation foundation, comprising:

[0048] S1. Measure and lay out the cofferdam, and use water-resistant building materials to build the cofferdam;

[0049] S2. Use blown sand filling to make the site inside the cofferdam reach the blown sand filling height, and use a soil compactor to flatten the site;

[0050] S3. Install drain boards on site according to the measurement results, with the drain boards arranged vertically in holes;

[0051] S4, installing a drain pipe, the drain pipe connects all the drain boards, the drain pipe is connected to a vacuum pump, and the vacuum pump is debugged;

[0052] S5. Lay a layer of non-woven fabric on the drain pipe, and lay 2 to 4 layers of sealing film on the non-woven fabric;

[0053] S6. Dig trenches around the site, lay the sealing membrane along the bottom of the trench, backfill with rock and soil to form a cofferdam, and perform sealing treatment;

[0054] S7, the vacuum pump starts to pump air;

[0055] S8. Laying a protective layer on the sealing membrane, and at the same time gradually piling up filling soil on the protective layer, and pre-pressing for a certain period of time.

[0056] In step S3, the drainage board is injected into the foundation by a board inserting machine, which can improve the construction efficiency and reduce the construction difficulty.

[0057] The drain plate includes a fixed plate 1, a movable plate 2 and a filter membrane 3. The fixed plate 1 is provided with a mounting through hole 4. The movable plate 2 is movably connected in the mounting through hole 4. The dredging rod 5 on the movable plate 2 penetrates the fixed plate 1 and the filter membrane 3. The filter membrane 3 covers the outer surface of the fixed plate 1. The fixed plate 1 is provided with a plurality of through holes. When vacuuming, water passes through the filter membrane and then enters the fixed plate from the through hole. Under the action of the water flow, the spring is compressed, and the movable plate can move a short distance relative to the drain plate, thereby moving the dredging rod, which can cause the water body to fluctuate, making it easier for the filter membrane to enter the drain plate. At the same time, the filling material can be loosened to facilitate the water to flow to the drain plate.

[0058] The surface of the fixing plate 1 is provided with a plurality of protrusions 6, and gaps are left between the plurality of protrusions 6 to facilitate water flow.

[0059] A plurality of first mounting grooves are arranged on the fixed plate 1 , and the first mounting grooves are communicated with the mounting through holes 4 . A spring 7 is arranged in the first mounting groove, and one end of the spring 7 is connected to the movable plate 2 .

[0060] The dredging rod 5 has a diameter-reducing section, and the diameter-reducing section passes through the fixing plate 1. This facilitates water to flow into the fixing plate.

[0061] The blowing and filling in step S2 includes the following steps:

[0062] S21, performing a blow-fill operation inside the cofferdam to form a first blow-fill layer;

[0063] S22, a first elastic fixed grid 8 is arranged in the first blow filling layer;

[0064] S23, adding a curing agent to the first blow-fill layer;

[0065] S24, repeat the above steps until the filling is completed.

[0066] Second elastic fixed grids 9 are arranged between the first elastic fixed grids. The first elastic fixed grids are arranged horizontally, and the second elastic fixed grids are arranged vertically.

[0067] During filling, layered filling is carried out, and a first elastic fixed grid is set in each filling layer to improve the overall strength. At the same time, adding a curing agent in the filling layer can promote the consolidation of the filled material and further improve the strength of the foundation. The first elastic fixed grids are connected by a second elastic fixed grid, so that the first elastic fixed grids can be connected into a whole, thereby improving the anti-subsidence performance.

[0068] Working principle: After vacuuming, the vacuum pressure directly acts on the water and gas fluid in the sand cushion layer, forming a pressure difference between the lower soil and the sand cushion layer, so that the water and gas in the surface soil are pumped out through the drainage pipe connected to the vacuum pump under the action of the pressure difference, and then into the water channel drainage board, so that the water and gas in the deep soil are pumped out. During the whole process, negative excess pore water pressure is generated in the soil. With the discharge of water and gas, the excess pore water pressure continues to dissipate, and the effective stress of the soil continues to increase, so that the soil is strengthened; by using water-resistant building materials to build cofferdams, the ability to resist seawater erosion and scouring can be increased. When filling, layered filling is carried out, and the first elastic The elastic fixed grid can improve the overall strength. At the same time, adding a curing agent in the filling layer can promote the consolidation of the blown fill material, further improving the strength of the foundation. The first elastic fixed grids are connected by the second elastic fixed grid, so that the first elastic fixed grids can be connected into a whole, thereby improving the anti-sedimentation performance; the drain board is composed of a fixed plate, a movable plate and a filter membrane. When vacuuming, negative pressure is generated. At the same time, under the action of water flow, the spring is compressed, and the movable plate can move a short distance relative to the drain board, thereby moving the dredging rod, which can cause the water body to fluctuate, making it easier for the filter membrane to enter the drain board. At the same time, it can also loosen the filling material to facilitate water to flow to the drain board.

[0069] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for treating erosion and subsidence of artificial land reclamation, characterized in that: include: S1. Measure and lay out the cofferdam, and use water-resistant building materials to build the cofferdam; S2. Use blown sand filling to make the site inside the cofferdam reach the blown sand filling height, and use a soil compactor to flatten the site; S3. Install drain boards on site according to the measurement results, with the drain boards arranged vertically in holes; S4, installing a drain pipe, the drain pipe connects all the drain boards, the drain pipe is connected to a vacuum pump, and the vacuum pump is debugged; S5. Lay a layer of non-woven fabric on the drain pipe, and lay 2 to 4 layers of sealing film on the non-woven fabric; S6. Dig trenches around the site, lay the sealing membrane along the bottom of the trench, backfill with rock and soil to form a cofferdam, and perform sealing treatment; S7, the vacuum pump starts to pump air; S8. Laying a protective layer on the sealing membrane, and at the same time gradually piling up filling soil on the protective layer, and pre-pressing for a certain period of time.

2. The method for treating erosion and subsidence of artificial land reclamation according to claim 1, characterized in that: In step S3, the drainage board is injected into the foundation by a board inserting machine.

3. The method for treating erosion and subsidence of artificial land reclamation according to claim 1, characterized in that: The drainage plate includes a fixed plate, a movable plate and a filter membrane. The fixed plate is provided with a mounting through hole. The movable plate is movably connected in the mounting through hole. The dredging rod on the movable plate passes through the fixed plate and the filter membrane. The filter membrane covers the outer surface of the fixed plate. The fixed plate is provided with a plurality of through holes.

4. The method for treating the erosion and subsidence of artificial land reclamation according to claim 3, characterized in that: A plurality of protrusions are arranged on the surface of the fixing plate, and gaps are left between the plurality of protrusions.

5. The method for treating the erosion and subsidence of artificial land reclamation according to claim 3, characterized in that: A plurality of first mounting grooves are arranged on the fixed plate, the first mounting grooves are communicated with the mounting through holes, a spring is arranged in the first mounting groove, and one end of the spring is connected to the movable plate.

6. The method for treating erosion and subsidence of artificial land reclamation according to claim 3, characterized in that: The dredging rod has a diameter-changing section, and the diameter-changing section passes through the fixing plate.

7. The method for treating erosion and subsidence of artificial land reclamation according to claim 1, characterized in that: The blowing and filling in step S2 includes the following steps: S21, performing a blow-fill operation inside the cofferdam to form a first blow-fill layer; S22, a first elastic fixed grid is provided in the first blow filling layer; S23, adding a curing agent to the first blow-fill layer; S24, repeat the above steps until the filling is completed.

8. The method for treating the erosion and settlement of artificial land reclamation according to claim 7, characterized in that: Second elastic fixed grids are arranged between the first elastic fixed grids, the first elastic fixed grids are arranged horizontally, and the second elastic fixed grids are arranged vertically.

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