Vacuum rapid dewatering device for bottom of mud in shield mud pit

Abstract

The utility model relates to the technical field of engineering waste mud dewatering, in particular to a mud bottom vacuum rapid dewatering device in a shield mud pit, which comprises a mud pit, and a filter structure is arranged at the bottom of the mud pit. The filtering structure comprises a pervious concrete layer, and a water pumping structure is arranged in the pervious concrete layer; the water pumping structure comprises a drainage pipe structure, drainage holes are evenly distributed in the drainage pipe structure, and the tail end of the drainage pipe structure is connected with a vacuum pump through a water pumping valve. The vacuum water pumping structure is arranged at the bottom of the mud pit, so that the problem that vacuum water pumping equipment cannot be arranged due to the fact that a running track and a portal frame are arranged at the top of the shield mud pit can be solved; the dehydration efficiency is accelerated by virtue of the self weight of the slurry, and the slurry dehydration period is effectively shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering waste mud dehydration, in particular to a vacuum rapid dehydration device for mud bottom in a shield mud pool. Background Art

[0002] With the development of urbanization, underground pipe gallery, rail transit, subway tunnel and other projects are widely constructed, which generates a large amount of waste mud. These muds have high water content and large volume, which are difficult to handle in a short time and are often transported to other locations for treatment. At present, the mud is often transported by tank trucks. Due to the large output and high water content of engineering mud, about 75% of the mud actually transported is water, resulting in high mud treatment costs and low efficiency. In the process of mud transportation, there are often spills, which easily cause environmental pollution. Moreover, most cities are gradually prohibiting the passage of tank trucks and muck trucks, which brings great inconvenience to the use of tank trucks to transport mud. At present, the dehydration treatment of mud is mainly carried out by building large-scale mud pools to allow the mud to settle naturally. This method is time-consuming, affects the progress of the construction period, and greatly reduces the economic benefits of the project.

[0003] There is an existing patent with application number 202023168081.6, which discloses a waste mud vacuum dehydration device, including waste mud placed in a mud pool and a drainage mesh mat covering the waste mud, wherein a plurality of drainage pipe grooves for placing horizontal drainage pipes are arranged on the drainage mesh mat, and a plurality of joint grooves are arranged along the line of each drainage pipe groove, and tube sheet joints connected in series with the horizontal drainage pipes are arranged in these joint grooves, and these tube sheet joints are connected to drainage plates that penetrate the drainage mesh mat and are embedded in the waste mud, and each horizontal drainage pipe is connected to a vacuum pump through a drainage main pipe; although this patent can use vacuum dehydration to treat mud, its vacuum dehydration equipment is placed on the top of the mud pool. In the shield mud pool, since a running track and a gantry are arranged on the top of the mud pool, it is impossible to provide sufficient installation space for the vacuum equipment, resulting in limited scope of application. Utility Model Content

[0004] The utility model aims to provide a vacuum rapid dehydration device for mud bottom in a shield mud pool, in which the vacuum dehydration equipment is arranged at the bottom of the mud pool.

[0005] Based on the above purpose, the utility model adopts the following technical solutions:

[0006] A vacuum rapid dehydration device for the bottom of mud in a shield mud pool comprises a mud pool, a filtering structure is arranged at the bottom of the mud pool, and a pumping structure is arranged in cooperation with the filtering structure; the filtering structure comprises a permeable concrete layer, and the inside of the permeable concrete layer is hollow; the pumping structure comprises a drainage pipe structure arranged inside the permeable concrete layer, a plurality of drainage holes are evenly arranged on the drainage pipe structure, and the drainage pipe structure is connected to a vacuum pump.

[0007] Preferably, the drainage pipe structure comprises a longitudinal drainage pipe, and a plurality of longitudinal drainage pipes are arranged in parallel along the length direction of the mud pool; a transverse drainage pipe is arranged along the width direction of the mud pool, and the transverse drainage pipe is respectively connected to one end of each longitudinal drainage pipe.

[0008] Preferably, a section of the longitudinal drainage pipe is closed, and the other end is connected to the transverse drainage pipe; one end of the transverse drainage pipe is closed, and the other end is connected to the vacuum pump through a joint; a pumping valve is provided at the joint.

[0009] Preferably, the longitudinal drain pipes are connected to the sides of the transverse drain pipes at equal intervals, and glue is applied to the connection between the longitudinal drain pipes and the transverse drain pipes and connected by wrapping with tape.

[0010] Preferably, a geotextile layer is sandwiched between the drainage pipe structure and the permeable concrete layer.

[0011] Preferably, a gauze layer is provided on the outer sides of the longitudinal drainage pipe and the transverse drainage pipe.

[0012] Preferably, the thickness of the permeable concrete layer is 30-80 cm, and the strength grade of concrete used in the permeable concrete layer is C30.

[0013] The beneficial effects of the utility model are:

[0014] The utility model arranges the vacuum dehydration pipeline and equipment at the bottom of the mud pool, so that the space at the top of the mud pool can be used to lay running tracks, gantry and other equipment, solving the problem that the traditional dehydration device cannot be set up due to the limitation of the equipment at the top of the shield mud pool.

[0015] The utility model sets the vacuum dehydration device at the bottom of the mud pool, and can use the mud's own weight to increase the dehydration efficiency; by setting a vacuum pump to actively pump water, and using the mud's own weight to accelerate dehydration, the mud dehydration efficiency can be effectively improved and the construction period can be shortened; at the same time, the utility model can dehydrate the mud to a soft plastic state, which can save transportation costs and reduce environmental pollution.

[0016] The utility model adopts a permeable concrete layer as a filtering structure, which can filter gravel, silt and the like in the mud and only allow water in the mud to pass through; a geotextile layer is laid on the permeable concrete layer to prevent mud from clogging the drainage system; the drainage pipe structure is wrapped with gauze, and the gauze is only permeable gauze, which can further prevent gravel, silt and the like from entering the drainage pipe and causing blockage; a pumping valve is arranged at the joint of the horizontal drainage pipe and the vacuum pump to adjust the pumping rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2 This is a top view of the utility model after removing the mud, geotextile layer and part of the permeable concrete layer;

[0019] Figure 3 It is an exploded view of each structural layer in the permeable concrete of the utility model;

[0020] Figure 4 This is a schematic diagram of the drainage pipe structure of the utility model.

[0021] In the figure: permeable concrete layer 1; longitudinal drainage pipe 2; mud pool 3; transverse drainage pipe 4; gauze 5; reserved joint 6; tape 7; pumping valve 8; drainage hole 9; mud 10; geotextile layer 11. DETAILED DESCRIPTION

[0022] The following is a further explanation of the present invention in conjunction with specific embodiments. Figure 1 As shown, this embodiment is a mud dewatering device for a shield mud pool, which is suitable for the situation where it is necessary to lay running tracks and gantry and other equipment on the top of the mud pool 3, but it is impossible to set up pumping pipes and devices on the top of the mud pool 3; in this embodiment, the mud pool 3 is 50m long, 20m wide, and 2-3m deep, and the specific dimensions of the mud pool 3 can also be adjusted according to actual conditions.

[0023] like Figure 1 As shown, this embodiment mainly includes a filtering structure arranged at the bottom of the mud pool 3, including a horizontally arranged permeable concrete layer 1. In this embodiment, the permeable concrete layer 1 has a thickness of 50 cm and a strength of C30. In practical applications, adaptive adjustments can also be made according to actual conditions; the permeable concrete layer 1 is a hollow structure or a double-layer structure, such as Figure 3 As shown, a pumping structure is arranged inside, which mainly includes drainage pipes, namely a longitudinal drainage pipe 2 arranged along the length direction of the mud pool 3, and a transverse drainage pipe 4 arranged along the width direction of the mud pool 3.

[0024] like Figure 2As shown, a plurality of longitudinal drainage pipes 2 are evenly arranged in the mud pool 3, and a transverse drainage pipe 4 is arranged on one side of the mud pool 3, and is respectively connected to one end of each longitudinal drainage pipe 2; wherein the length of the longitudinal drainage pipe 2 is slightly smaller than the length of the mud pool 3, and the length of the transverse drainage pipe 4 is slightly smaller than the width of the mud pool 3; Figure 2 It is a top view of this embodiment, and the top permeable concrete layer 1 and geotextile layer 11, as well as mud 10 are removed to show the connection relationship of the drainage pipe structure.

[0025] like Figure 2 As shown, a tape 7 is provided at the connection between the longitudinal drain pipe 2 and the transverse drain pipe 4. The tape 7 is made of raw tape, and glue needs to be applied before sticking the tape 7 to prevent water leakage. If the drain pipe is made of PVC plastic material, PVC glue needs to be used to coat the interface, and then raw tape is pasted to further prevent water leakage at the interface.

[0026] like Figure 4 As shown, a plurality of drainage holes 9 are provided on the longitudinal drainage pipe 2 and the transverse drainage pipe 4, and the drainage holes 9 are of uniform size and evenly arranged on the drainage pipe; the diameter of the drainage pipe can be selected to be 200 mm, and the diameter of the drainage pipe and the aperture size of the drainage holes can be adaptively modified according to actual conditions; a layer of gauze 5 is provided on the outside of the drainage pipe, and the gauze 5 is made of water-permeable gauze to prevent gravel, mud and sand particles from entering the drainage pipe and even the subsequent vacuum equipment to cause equipment blockage or even damage.

[0027] like Figure 2 As shown, one end of the transverse drainage pipe 4 is closed, and the other end is connected to a vacuum pump through a reserved joint 6; a pumping valve 8 is also provided on the reserved joint 6, and the pumping valve 8 can be used to regulate the pumping rate of the vacuum pump.

[0028] In actual use of this embodiment, after the filtering structure and the pumping structure are set at the bottom of the mud pool 3, the shield mud 10 is poured into the mud pool 3; then the pumping valve 8 is opened, and after adjusting and selecting a suitable pumping rate, the vacuum pump is turned on to start dehydration; under the weight of the mud 10 and the action of the vacuum pump, the water in the mud 10 is filtered through the permeable concrete layer 1, the geotextile layer 11 and the gauze 5 in turn, and then enters the drainage pipe through the drainage holes 9 on the longitudinal drainage pipe 2 and the transverse drainage pipe 4, and is discharged from the mud pool 3 through the pumping valve 8 at the reserved joint 5; after a period of dehydration and drainage, the mud in a soft plastic state can be obtained, so that it can be cleaned and transported out.

[0029] The above description is only a further explanation of the present invention in combination with specific embodiments. All descriptions do not limit the protection scope of the present invention. Any changes or replacement solutions that can be easily thought of by technicians in this field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vacuum rapid dehydration device for the bottom of mud in a shield mud pool, comprising a mud pool, characterized in that: A filtering structure is provided at the bottom of the mud pool, and a pumping structure is provided in cooperation with the filtering structure; the filtering structure includes a permeable concrete layer, and the interior of the permeable concrete layer is hollow; the pumping structure includes a drainage pipe structure provided inside the permeable concrete layer, and a plurality of drainage holes are evenly provided on the drainage pipe structure, and the drainage pipe structure is connected to a vacuum pump.

2. The device for rapid vacuum dehydration of mud bottom in a shield mud pool according to claim 1, characterized in that: The drainage pipe structure comprises a longitudinal drainage pipe, and a plurality of longitudinal drainage pipes are arranged in parallel along the length direction of the mud pool; a transverse drainage pipe is arranged along the width direction of the mud pool, and the transverse drainage pipe is respectively connected to one end of each longitudinal drainage pipe.

3. The device for rapid vacuum dehydration of mud bottom in a shield mud pool according to claim 2, characterized in that: One section of the longitudinal drainage pipe is closed, and the other end is connected to the transverse drainage pipe; one end of the transverse drainage pipe is closed, and the other end is connected to the vacuum pump through a joint; a pumping valve is provided at the joint.

4. The device for rapid vacuum dehydration of mud bottom in a shield mud pool according to claim 3, characterized in that: The longitudinal drainage pipes are connected to the sides of the transverse drainage pipes at equal intervals, and glue is applied to the connection between the longitudinal drainage pipes and the transverse drainage pipes and connected by wrapping with tape.

5. The device for rapid vacuum dehydration of mud bottom in a shield mud pool according to claim 4, characterized in that: A geotextile layer is sandwiched between the drainage pipe structure and the permeable concrete layer.

6. The device for rapid vacuum dehydration of mud bottom in a shield mud pool according to claim 4, characterized in that: Gauze layers are arranged on the outer sides of the longitudinal drainage pipe and the transverse drainage pipe.

7. The device for rapid vacuum dehydration of mud bottom in a shield mud pool according to claim 5, characterized in that: The permeable concrete layer has a thickness of 30-80 cm.

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