Pre-pressing structure of dredger fill sludge foundation

Abstract

The utility model relates to a prepressing structure of a dredger fill sludge foundation, which comprises a dredger fill sludge layer, a sand cushion layer, a sealing layer vacuum tube layer, a connecting pipeline, a drainage pipeline and a vertical drainage body. After a clogging layer is formed along with the lapse of operation time, the drainage pipeline can continue to drain water, and an inverted filter structure of the drainage pipeline can prevent soil particles of a dredger filling sludge layer from entering the drainage pipeline to cause blockage or influence the drainage effect, so that when the drainage efficiency of the vertical drainage body is reduced after the clogging layer is formed, the water level can be reduced in combination with vacuum preloading, and the drainage efficiency of the vertical drainage body is improved. The drainage efficiency is improved, and the sludge can be quickly consolidated.

Description

Technical Field

[0001] The utility model relates to the technical field of reclamation by filling sea areas, in particular to a preloading structure for a dredger fill silt foundation. Background Technique

[0002] Vacuum preloading means laying a sand cushion layer on the soft soil surface to be reinforced, then burying drainage pipes, and then laying a sealing layer above the sand cushion layer to isolate the sand cushion layer from the atmosphere. A vacuum pipe is buried in the sand cushion layer, and a branch pipe communicating with the drainage pipe is arranged on the vacuum pipe. Then, by means of vacuum pumping with a vacuum pump and the like, a negative pressure is formed inside the drainage pipe, and then the water body in the soft soil layer is pumped out to increase the effective stress of the foundation; Dredger fill silt for land reclamation is used in urban construction and industrial and agricultural production, effectively alleviating the shortage of construction land.

[0003] At present, vacuum preloading and drainage consolidation are generally used to reinforce the dredger fill silt foundation. However, due to its high viscosity, non-uniformity, and poor structure, the dredger fill silt is prone to form a clogging layer during the drainage process, resulting in poor drainage, which affects the consolidation speed of the foundation and prolongs the construction period.

[0004] Based on this, the utility model provides a preloading structure for a dredger fill silt foundation to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a preloading structure for a dredger fill silt foundation to solve the technical problem that in the prior art, vacuum preloading and drainage consolidation are used to reinforce the dredger fill silt foundation. Due to its high viscosity, non-uniformity, and poor structure, the dredger fill silt is prone to form a clogging layer during the drainage process, resulting in poor drainage, which affects the consolidation speed of the foundation and prolongs the construction period as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A preloading structure for a dredger fill silt foundation, comprising: a dredger fill silt layer, a sand cushion layer, a sealed layer vacuum pipe layer, connecting pipes, drainage pipes, and vertical drainage bodies. The sand cushion layer and the sealed layer are sequentially laid above the dredger fill silt layer, and a vacuum pipe layer is arranged on the top of the sealed layer. The vacuum pipe layer is divided into a main pipe and branch pipes. The main pipe is connected to a vacuum pump, and a vacuum membrane is arranged on the top of the vacuum pipe layer. The branch pipes are connected to connecting pipes. The connecting pipes are connected to the branch pipes through connectors, and the connecting pipes are threadedly connected to the drainage pipes. The drainage pipes include threaded sleeves, drainage channels, end caps, water seepage holes, and an anti-filter structure. The threaded sleeves are threadedly connected to the connecting pipes, and the threaded sleeves are communicated with the drainage channels. The bottom ends of the drainage pipes are provided with end caps, a group of water seepage holes are arranged at the bottom ends of the end caps, and an anti-filter structure is communicated with the bottom of the end caps. Vertical drainage bodies are also arranged above the dredger fill silt layer, and the tops of the vertical drainage bodies are the vacuum pipe layer.

[0008] As a preferred solution, a cofferdam is arranged around the dredger fill silt layer, and the vacuum pump is arranged outside the cofferdam.

[0009] As a preferred solution, the anti-filter structure includes a protective sleeve layer and a filtering medium layer, and the filtering medium layer is arranged inside the protective sleeve layer.

[0010] As a preferred solution, the protective sleeve layer is threadedly connected to the end cap.

[0011] As a preferred solution, a sealing gasket is arranged inside the threaded sleeve.

[0012] It can be seen from the technical solutions provided by the present utility model described above that, compared with the prior art, the beneficial effects of a preloading structure for a dredger fill silt foundation provided by the present utility model are as follows:

[0013] By arranging the drainage pipes and the vertical drainage bodies, the vacuum negative pressure discharges the water in the silt through the vertical drainage bodies. As the operation time goes by and a siltation layer is formed, the drainage pipes can continue to drain water. The anti-filter structure of the drainage pipes can prevent the soil particles in the dredger fill silt layer from entering the drainage pipes and causing blockage or affecting the drainage effect. Therefore, when the drainage efficiency of the vertical drainage bodies decreases after the siltation layer is formed, the vacuum preloading can be combined to lower the water level, improve the drainage efficiency, and quickly consolidate the silt. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of a preloading structure for a dredger fill silt foundation provided by an embodiment of the present utility model;

[0015] Figure 2Partial structural three-dimensional schematic diagram of a preloading structure for a dredger fill silt foundation provided by an embodiment of the present invention;

[0016] Figure 3 Three-dimensional schematic diagram of a connecting pipe of a preloading structure for a dredger fill silt foundation provided by an embodiment of the present invention;

[0017] Figure 4 Three-dimensional schematic diagram of a drainage pipe of a preloading structure for a dredger fill silt foundation provided by an embodiment of the present invention;

[0018] Figure 5 Cross-sectional schematic diagram of a drainage pipe of a preloading structure for a dredger fill silt foundation provided by an embodiment of the present invention;

[0019] In the figure: 1, dredger fill silt layer; 2, sand cushion layer; 3, sealing layer; 4, vacuum pipe layer; 41, main pipe; 42, branch pipe; 43, vacuum pump; 44, vacuum membrane; 5, connecting pipe; 51, connecting piece; 6, drainage pipe; 61, threaded sleeve; 611, sealing gasket; 62, drainage channel; 63, end cap; 64, water seepage hole; 65, filter structure; 651, protective sleeve layer; 652, filtering medium layer; 7, vertical drainage body. Detailed implementation manners

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0023] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more, unless otherwise specifically defined.

[0024] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and the specific embodiments.

[0025] Please refer to Figures 1 to 5 , the embodiment of the present application provides a preloading structure for a dredger fill silt foundation, including a dredger fill silt layer 1, a sand cushion layer 2, a sealing layer 3, a vacuum pipe layer 4, a connecting pipe 5, a drainage pipe 6, and a vertical drainage body 7. The sand cushion layer 2 and the sealing layer 3 are sequentially laid above the dredger fill silt layer 1, and a vacuum pipe layer 4 is arranged on the top of the sealing layer 3; the vacuum pipe layer 4 is divided into a main pipe 41 and branch pipes 42, the main pipe 41 is communicated with a vacuum pump 43, a vacuum film 44 is arranged on the top of the vacuum pipe layer 4, and the branch pipes 42 are communicated with the connecting pipe 5; the connecting pipe 5 is connected to the branch pipes 42 through a connector 51, and the connecting pipe 5 is threadedly connected to the drainage pipe 6; the drainage pipe 6 includes a threaded sleeve 61, a drainage channel 62, an end cap 63, water seepage holes 64, and an anti-filter structure 65. The threaded sleeve 61 is threadedly connected to the connecting pipe 5, the threaded sleeve 61 is communicated with the drainage channel 62, the bottom end of the drainage pipe 6 is provided with an end cap 63, a group of water seepage holes 64 are arranged at the bottom end of the end cap 63, and an anti-filter structure 65 is communicated with the bottom of the end cap 63; a vertical drainage body 7 is further arranged above the dredger fill silt layer 1, and the top of the vertical drainage body 7 is the vacuum pipe layer 4.

[0026] Working principle and effect:

[0027] When preloading the dredger fill silt foundation, first insert the drainage pipe 6 and the vertical drainage body 7 into the dredger fill silt layer 1, and then lay the main pipe 41 and the branch pipe 42 of the vacuum pipe on the upper surface of the dredger fill silt layer 1, so that the branch pipe 42 corresponds to the position of the drainage pipe 6 through the connecting pipe 5. Then the staff connects the connecting pipe 5 with the drainage pipe 6. After the connection between the connecting pipe 5 and the drainage pipe 6 is completed, cover the vacuum film 44 on the upper surface of the dredger fill silt layer 1, then cover the sand cushion layer 2 and the sealing layer 3 in sequence, and then connect the vacuum pipe with the vacuum pump 43, and then conduct vacuum preloading on the dredger fill silt layer 1. Under the action of vacuum preloading, the water in the dredger fill silt layer 1 is discharged through the vertical drainage body 7. At the same time, due to the self-weight and viscosity of the dredger fill silt layer 1 itself, the water in the dredger fill silt layer 1 will gradually flow downward to form a clogging layer. By setting the drainage pipe 6 and the vertical drainage body 7, the vacuum negative pressure discharges the moisture in the silt through the vertical drainage body 7. As the clogging layer is formed over time during the operation, the drainage pipe 6 can continue to drain water. The filter structure 65 of the drainage pipe 6 can prevent the soil particles of the dredger fill silt layer 1 from entering the drainage pipe 6 and causing blockage or affecting the drainage effect. Thus, when the drainage efficiency of the vertical drainage body 7 decreases after the clogging layer is formed, the vacuum preloading is combined to lower the water level, improving the drainage efficiency and enabling the silt to be quickly consolidated.

[0028] In one embodiment, a cofferdam is arranged around the dredger fill silt layer 1, and the vacuum pump 43 is arranged outside the cofferdam; by setting the cofferdam, the scope of the preloading area is determined. Inside the cofferdam, the vacuum pipe layer 4 is arranged. The vacuum pipe layer 4 is a pipeline for transmitting uniform vacuum pressure and pumping and draining water, and is connected to the vacuum pump 43 through the main pipe 41 and the branch pipe 42 for vacuum preloading to draw vacuum.

[0029] In one embodiment, the filter structure 65 includes a protective sleeve layer 651 and a filter medium layer 652. The filter medium layer 652 is arranged inside the protective sleeve layer 651; the protective layer is located outside the filter medium layer 652. It is used to protect the filter medium from direct external impact or damage and is usually made of wear-resistant and corrosion-resistant materials; the filter medium layer 652 is the core part of the filter structure 65 and is usually composed of materials with good filtering performance, such as quartz sand, activated carbon, ceramic particles or non-woven fabrics of specific specifications. These materials can effectively throttle the particulate matter in the soil and prevent it from entering the pipeline interior; the filter mechanism of the drainage pipe 6 effectively filters and blocks soil particles and impurities through the filter medium layer 652. When water flows through the drainage pipe 6, it will first pass through the filter medium layer 652 of the filter structure 65. Due to the filter medium layer 652 having a smaller pore size and a larger specific surface area, it can effectively intercept the particulate matter in the water flow to prevent the soil particles of the dredger fill silt layer 1 from entering the drainage pipe 6 and causing blockage or affecting the drainage effect.

[0030] In one embodiment, the protective sleeve layer 651 is threadedly connected to the end cap 63. The threaded connection between the protective sleeve layer 651 and the end cap 63 enables the anti-filter structure 65 to be detached from the drainage pipe 6, facilitating the user or staff to maintain or replace the anti-filter structure 65.

[0031] In one embodiment, as Figure 1 or Figure 3 shown, a sealing gasket 611 is provided inside the threaded sleeve 61. The sealing gasket 611 is used to increase the sealing performance of the contact part between the threaded sleeve 61 and the drainage pipe 6. The sealing gasket 611 can be made of a rubber gasket and is used to abut against the threaded sleeve 61 and the drainage pipe 6.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-compression structure for a dredger-filled silt foundation, characterized in that: include: A blown sludge layer (1), a sand cushion layer (2) and a sealing layer (3), wherein the sand cushion layer (2) and the sealing layer (3) are laid in sequence on top of the blown sludge layer (1), and a vacuum tube layer (4) is arranged on top of the sealing layer (3); The vacuum tube layer (4) is divided into a main tube (41) and a branch tube (42); the main tube (41) is connected to a vacuum pump (43); a vacuum membrane (44) is provided on the top of the vacuum tube layer (4); and the branch tube (42) is connected to a connecting tube (5); The connecting pipe (5) is connected to the branch pipe (42) via a connecting piece (51), and the connecting pipe (5) is threadedly connected to the drainage pipe (6); The drainage pipe (6) comprises a threaded sleeve (61), a drainage channel (62), an end cover (63), a water seepage hole (64) and a filter structure (65); the threaded sleeve (61) is threadedly connected to the connecting pipe (5); the threaded sleeve (61) is communicated with the drainage channel (62); the bottom end of the drainage pipe (6) is provided with an end cover (63); the bottom end of the end cover (63) is provided with a group of water seepage holes (64); the bottom of the end cover (63) is communicated with the filter structure (65); A vertical drainage body (7) is also provided above the blown sludge layer (1), and the top of the vertical drainage body (7) is a vacuum tube layer (4).

2. The pre-compression structure of the dredger-filled silt foundation according to claim 1 is characterized in that: A cofferdam (11) is arranged at the periphery of the blown sludge layer (1), and the vacuum pump (43) is arranged at the outside of the cofferdam (11).

3. The pre-compression structure of the dredger-filled silt foundation according to claim 1 is characterized in that: The reverse filtration structure (65) comprises a protective sleeve layer (651) and a filter medium layer (652), and the filter medium layer (652) is arranged inside the protective sleeve layer (651).

4. The pre-compression structure of the dredger-filled silt foundation according to claim 3 is characterized in that: The protective sleeve layer (651) is threadedly connected to the end cover (63).

5. The pre-compression structure of the dredger-filled silt foundation according to claim 1 is characterized by: A sealing gasket (611) is provided inside the threaded sleeve (61).

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