CN211849391U - Vacuum pre-compaction double-layer drainage structure - Google Patents
Vacuum pre-compaction double-layer drainage structure Download PDFInfo
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- CN211849391U CN211849391U CN202020215169.XU CN202020215169U CN211849391U CN 211849391 U CN211849391 U CN 211849391U CN 202020215169 U CN202020215169 U CN 202020215169U CN 211849391 U CN211849391 U CN 211849391U
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Abstract
The utility model discloses a double-deck drainage structures of vacuum preloading belongs to silt processing technology field, the silt in situ is inserted and is equipped with a plurality of filter plates, silt layer upper berth is equipped with the filter layer, goes up the filter layer upper berth and is equipped with the top drain pipe network system with the filter plate intercommunication, and top drain pipe network system upper berth is equipped with the seal membrane, top drain pipe network system intercommunication has the vacuum pump, it is located outside the cofferdam to go up the vacuum pump, be equipped with lower filter layer between silt layer and the stock dump upper surface, be equipped with bottom drain pipe network system between lower filter layer and the stock dump upper surface, bottom drain pipe network system includes a plurality of filter tubes, the filter tube is equipped with a plurality of filtration pores, the filter tube intercommunication has the vacuum pump down, the vacuum pump is located outside. This double-deck drainage structures of vacuum preloading adopts the mode of double-deck drainage to carry out the vacuum preloading drainage to silt for humidity is more balanced about the soil body after the processing, and is better to the drainage consolidation effect of silt.
Description
Technical Field
The utility model belongs to the technical field of the silt processing technique and specifically relates to a double-deck drainage structures of vacuum pre-compaction is related to.
Background
The vacuum preloading method is that a vertical drainage channel (such as a sand well, a bagged sand well or a plastic drainage plate) is inserted into a soft foundation to be reinforced, then a sand cushion layer is laid on the ground, and then an airtight film is covered on the sand cushion layer. And (2) a vacuum pump or other vacuum means is used for vacuumizing under the membrane to form negative pressure (relative to atmospheric pressure)), the negative pressure is transmitted downwards along the vertical drainage channel to enable the unequal pressure state of the soil body and the vertical drainage channel to be transmitted into the soil body, and under the action of the negative pressure, pore water gradually seeps into the vertical drainage channel to achieve the effects of drainage consolidation and strength increase of the soil body. The vacuum preloading method is used as a new generation soft foundation reinforcing method, and is widely applied to engineering construction of ports, docks, airports, industrial and civil buildings and the like due to the advantages of short construction period, safe construction, no environmental pollution, low cost and the like.
For example, the chinese patent with the publication number of No. cn201120510920.x discloses a vacuum preloading structure for reinforcing a soft foundation, which is characterized in that a sealing film covers the upper part of a cofferdam, a vacuum main pipe and a plastic guide plate are arranged in the sealing film, the other end of the vacuum main pipe is connected with a vacuum pump, a sealing ditch is arranged below the outer side of the cofferdam, and the lower part of the sealing ditch is connected with a slurry sealing wall. The vacuum pump is used for pumping water and air to form negative pressure under the membrane, and pore water in the sludge can be seeped into the plastic guide plate, so that the effects of soil body drainage consolidation and strength increase are achieved. In the operation process, each detection instrument is installed to observe the sludge from time to time, and when the detected sludge reaches the standard, the pump can be stopped.
However, the vacuum preloading structure for reinforcing the soft foundation drains the sludge through the single-layer drainage system, the vacuum main pipe is positioned on the upper surface of the sludge layer, and although the plastic guide plate is vertically inserted into the sludge, the air suction and drainage effect of one end of the plastic guide plate close to the vacuum main pipe is better than that of the other end, so that the phenomenon that the treated soil body is dry at the top and wet at the bottom can be caused, and the drainage and consolidation effect on the sludge is poor.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a double-deck drainage structures of vacuum pre-compaction, this double-deck drainage structures of vacuum pre-compaction adopt the mode of double-deck drainage to carry out vacuum pre-compaction drainage to silt for humidity is more balanced about the soil body after the processing, and it is better to the drainage consolidation effect of silt.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the utility model provides a double-deck drainage structures of vacuum preloading, is provided with the cofferdam including the yard that is used for stacking silt on the yard, and the yard in the cofferdam is filled with the silt layer, silt layer interpolation is equipped with a plurality of filter plates, silt layer upper berth is equipped with the upper filter layer, and the upper filter layer upper berth is equipped with the top drain pipe network system with the filter plate intercommunication, and top drain pipe network system upper berth is equipped with the seal membrane, top drain pipe network system intercommunication has the upper vacuum pump, the upper vacuum pump is located outside the cofferdam, be equipped with down the filter layer between silt layer and the yard upper surface, be equipped with bottom drain pipe network system between lower filter layer and the yard upper surface, bottom drain pipe network system includes a plurality of filter tubes, the filter tube is equipped with a plurality of filtration pores, the filter tube intercommunication has the lower vacuum pump, the lower vacuum pump is located.
Through adopting above-mentioned technical scheme, can all bleed the drainage through top drain pipe network system and bottom drain pipe network system to the upper and lower layer of silt, make the drainage consolidation efficiency to silt faster on the one hand, make the humidity about the soil body after handling more balanced simultaneously, it is better to the drainage consolidation effect of silt.
The utility model discloses further set up to: the upper surface of the yard in the cofferdam comprises a left inclined surface and a right inclined surface, the left inclined surface and the right inclined surface are obliquely and downwards butted with each other, and the bottom drainage pipe network system is attached to the yard.
By adopting the technical scheme, the drain pipe of the bottom drain pipe network system is inclined towards the middle, so that in the draining process, pore water can quickly flow to the middle under the action of self gravity and is discharged out of the cofferdam, and the draining efficiency is accelerated.
The utility model discloses further set up to: a plurality of water collecting tanks are buried downwards at the joint of the left inclined plane and the right inclined plane, and the water collecting tanks are respectively communicated with a bottom water drainage pipe network system and a lower vacuum pump.
By adopting the technical scheme, water in the bottom drainage pipe network system can quickly flow and is stored in the water collecting tank in advance, so that pore water in the sludge can more easily seep into the bottom drainage pipe network system, and the drainage consolidation efficiency of the sludge can be further accelerated.
The utility model discloses further set up to: the storage yard is provided with a highland, the cofferdam is arranged on the highland, the water collecting tank is communicated with the lower vacuum pump through a plastic pipe, the highest point of the plastic pipe is a connecting point with the water collecting tank, and the highest point of the plastic pipe is higher than the lower vacuum pump.
Through adopting above-mentioned technical scheme, make the water in the header tank can flow to down automatically on the one hand for drainage efficiency is faster, and on the other hand is after closing down the vacuum pump simultaneously, and the outlet pipe that vacuum pump was still can be followed to the water in header tank and the bottom drainage pipe network system flows out down, makes the difficult ponding of header tank and bottom drainage pipe network system, makes things convenient for follow-up demolising header tank and bottom drainage pipe network system.
The utility model discloses further set up to: and a lower sealing film is paved on the yard in the cofferdam, and the bottom drainage pipe network system is positioned on the lower sealing film.
Through adopting above-mentioned technical scheme, the setting up of inferior sealing membrane makes silt below also can obtain further sealed for in air and the moisture of store yard below are difficult for entering into silt, can further improve holistic leakproofness in the cofferdam, make the drainage consolidation effect of whole silt faster.
The utility model discloses further set up to: the cofferdam is provided with a ditch, and the upper sealing film and the lower sealing film both extend into the ditch and are soaked in water of the ditch.
Through adopting above-mentioned technical scheme, the water through in the ditch is further sealed it all around of upper seal membrane and inferior seal membrane, improves holistic leakproofness in the cofferdam for the drainage consolidation efficiency of whole silt is faster.
The utility model discloses further set up to: be provided with the cylinder in the ditch, the bottom that the top seal membrane all walked around the cylinder and extends outside the ditch with inferior seal membrane.
Through adopting above-mentioned technical scheme, the setting of cylinder can play fixed effect to epitheca membrane and inferior sealing membrane for epitheca membrane and inferior sealing membrane are difficult to break away from in the ditch.
To sum up, the utility model discloses a beneficial technological effect does:
the upper layer, the middle layer and the lower layer of the sludge can be pumped and drained through the top drainage pipe network system, the filter plate and the bottom drainage pipe network system, so that the drainage consolidation efficiency of the sludge is higher, the upper humidity and the lower humidity of a treated soil body are more balanced, and the drainage consolidation effect of the sludge is better.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic structural diagram between the filter plate and the top drain pipe network system according to the present invention.
Fig. 4 is a partially enlarged schematic view of a portion B in fig. 3.
Fig. 5 is a plan view of the top drain net system of the present invention.
Fig. 6 is a plan view of the bottom drain piping system of the present invention.
In the figure, 1, a storage yard; 2. cofferdam; 3. a bottom drain pipe network system; 4. a lower filter layer; 5. a sludge layer; 6. filtering the plate; 61. a plate body; 62. filtering the membrane; 7. a lower vacuum pump; 8. an upper sealing film; 9. a top drain piping system; 10. a three-way pipe; 11. an upper vacuum pump; 12. an upper filter layer; 13. a left inclined plane; 14. a right inclined plane; 15. a water collection tank; 16. a highland; 17. a lower sealing film; 18. a ditch; 19. a through hole; 20. a plastic tube; 21. a drum; 22. a four-way pipe; 23. a sponge block; 24. and (5) filtering holes.
Detailed Description
Referring to fig. 1 and 2, for the utility model discloses a vacuum preloading double-layer drainage structure, including being higher than the highland 16 all around, the upper surface of highland 16 is for being used for stacking the yard 1 of silt, enclose cofferdam 2 on highland 16, yard 1 upper surface in cofferdam 2 includes left inclined plane 13 and right inclined plane 14, left inclined plane 13 and right inclined plane 14 slope butt joint each other downwards, make left inclined plane 13 and right inclined plane 14 constitute a V-shaped structure, a plurality of header tanks 15 have been buried underground downwards on the line that left inclined plane 13 and right inclined plane 14 meet, be provided with down vacuum pump 7 on yard 1 below highland 16, header tank 15 is linked together with down vacuum pump 7 through two plastic tubing 20, the peak of plastic tubing 20 is the tie point with header tank 15, water in the header tank 15 can flow to down in vacuum pump 7 along plastic tubing 20; a lower sealing membrane 17 is paved on a yard 1 in a cofferdam 2, a bottom drainage pipe network system 3 is paved on the lower sealing membrane 17, a lower filter layer 4 is paved on the bottom drainage pipe network system 3, the lower filter layer 4 is a non-woven geotextile of 400g/m, a sludge layer 5 is filled on the lower filter layer 4, and a plurality of filter plates 6 are inserted in the sludge layer 5; an upper filter layer 12 is laid on the sludge layer 5, the upper filter layer 12 is a non-woven geotextile of 400g/m, a top drainage pipe network system 9 is laid on the upper filter layer 12, the filter plates 6 upwards penetrate through the upper filter layer 12 to be communicated with the top drainage pipe network system 9, a sludge layer 5 is laid on the upper filter layer 12 to serve as a sealing layer, finally two layers of upper sealing films 8 are laid on the top drainage pipe network system 9, an upper vacuum pump 11 is arranged on the yard 1 below the highland 16, and the top drainage pipe network system 9 penetrates through the upper sealing films 8 to be communicated with the upper vacuum pump 11.
A rectangular ditch 18 is formed in the upper surface of the cofferdam 2, water is filled in the ditch 18, a roller 21 is placed in the ditch 18, the roller 21 is pressed on the upper sealing film 8 and the lower sealing film 17, the peripheral edges of the upper sealing film 8 and the lower sealing film 17 bypass the lower part of the roller and extend out of the ditch 18, and the sealing performance between the upper sealing film 8 and the lower sealing film 17 can be improved through the water.
As shown in fig. 3 and 4, the filter plate 6 comprises a plate body 61 and a filter membrane 62 fixedly coated outside the plate body 61, the filter membrane 62 is a nonwoven geotextile of 400g/m, the filter plate 6 is of a hollow structure, a plurality of through holes 19 communicated with the interior of the plate body 61 are formed in the outer wall of the plate body 61, pore water in sludge can pass through the filter membrane 62, and the sludge is blocked; a sponge block 23 is arranged in the filter plate 6, and the sponge can absorb water, so that pore water in the filter plate 6 can be reduced from flowing back to sludge after the upper vacuum pump 11 and the lower vacuum pump 7 stop working; the upper end of the filter plate 6 is inserted into the drain pipe of the top drain pipe network system 9 and is communicated with the drain pipe of the top drain pipe network system 9, the upper end of the filter plate 6 is further fixed with the drain pipe of the top drain pipe network system 9 through a binding belt, the drain pipe of the top drain pipe network system 9 is provided with filter holes 24 communicated with the drain pipe, and when sludge under the upper sealing film 8 is in a negative pressure state, pore water in the sludge can directly enter the top drain pipe network system 9 through the upper filtering layer 12; the drain pipes in the bottom drain pipe network system 3 are also provided with filter holes 24 (not shown, the drain pipes in the bottom drain pipe network system 3 are the same as the drain pipes in the top drain pipe network system 9).
As shown in fig. 5 and 6, the top drainage pipe network system 9 includes a plurality of drainage pipes, the drainage pipes are communicated with each other through a four-way pipe 22, the upper vacuum pump 11 is communicated with the top drainage pipe network system 9 through the drainage pipes, the drainage pipes connected with the upper vacuum pump 11 are communicated with the drainage pipes in the top drainage pipe network system 9 through a three-way pipe 10, and the number of the upper vacuum pumps 11 can be selected according to actual needs; the bottom drainage pipe network system 3 also comprises a plurality of drainage pipes, the drainage pipes are communicated with each other through a four-way pipe 22, and the water collection tank 15 is positioned on the vertical central line of the bottom drainage pipe network system 3.
In the construction process, the selection of the storage yard 1 is firstly carried out, the selected storage yard 1 is cleaned, the high land 16 is built on the storage yard 1, the high land 16 is embedded with a plastic pipe 20 and a water collecting tank 15 in advance in the building process, the plastic pipe 20 is communicated with a lower vacuum pump 7 outside a cofferdam 2, the cofferdam 2 is arranged on the high land 16, the storage yard 1 in the cofferdam 2 is repaired (the gradient is 1: 20), a lower sealing film 17 at one side is firstly paved on the storage yard 1 after the slope is repaired, then a bottom drainage pipe network system 3 is paved and connected, a lower filtering layer 4 is paved on the bottom drainage pipe network system 3, sludge is filled on the lower filtering layer 4, a filtering plate 6 is inserted in the sludge layer 5 after the sludge is filled, an upper filtering layer 12 is paved on the sludge layer 5, the filtering plate 6 passes through the upper filtering layer 12, a layer of sludge is filled on the upper filtering layer 12, a top drainage pipe network system 9 is paved and connected on the upper filtering layer 12, the filter plate 6 is connected with a top drainage pipe network system 9, and finally two layers of upper sealing films 8 are laid on the top drainage pipe network system 9, and the drainage pipe of the top drainage pipe network system 9 penetrates through the upper sealing films 8 to be connected with an upper vacuum pump 11.
The implementation principle of the embodiment is as follows: the upper vacuum pump 11 and the lower vacuum pump 7 are started to pump water and exhaust sludge in the cofferdam 2, in the process, the sludge between the upper sealing membrane 8 and the lower sealing membrane 17 can form negative pressure, pore water in the sludge can seep into the filter plate 6, the top drainage pipe network system 9 and the bottom drainage pipe network system 3, the sludge can be solidified, the pore water seeped into the filter plate 6 and the top drainage pipe network system 9 is discharged out of the cofferdam 2 through the upper vacuum pump 11, the pore water seeped into the bottom drainage pipe network system 3 can flow into the water collection tank 15 and be discharged out of the cofferdam 2 through the lower vacuum pump 7, after the detection instrument detects that the sludge reaches the standard, the upper vacuum pump 11 and the lower vacuum pump 7 stop working, and drainage consolidation of the sludge is completed.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (7)
1. The utility model provides a double-deck drainage structures of vacuum preloading, is provided with cofferdam (2) including yard (1) that is used for stacking silt on yard (1), and the blowing-in of yard (1) in cofferdam (2) has silt layer (5), silt layer (5) interpolation is equipped with a plurality of filter plates (6), silt layer (5) upper berth is equipped with upper filter layer (12), and upper filter layer (12) upper berth is equipped with top drain pipe network system (9) with filter plate (6) intercommunication, and top drain pipe network system (9) upper berth is equipped with upper seal membrane (8), top drain pipe network system (9) intercommunication has upper vacuum pump (11), upper vacuum pump (11) are located outside cofferdam (2), its characterized in that: the novel cofferdam is characterized in that a lower filter layer (4) is arranged between the sludge layer (5) and the upper surface of the storage yard (1), a bottom drain pipe network system (3) is arranged between the lower filter layer (4) and the upper surface of the storage yard (1), the bottom drain pipe network system (3) comprises a plurality of filter pipes, the filter pipes are provided with a plurality of filter holes (24), the filter pipes are communicated with a lower vacuum pump (7), and the lower vacuum pump (7) is positioned outside the cofferdam (2).
2. The vacuum preloading double-layer drainage structure as claimed in claim 1, wherein: the upper surface of the yard (1) in the cofferdam (2) comprises a left inclined surface (13) and a right inclined surface (14), the left inclined surface (13) and the right inclined surface (14) are mutually butted in an inclined mode downwards, and the bottom drainage pipe net system (3) is attached to the yard (1).
3. The vacuum preloading double-layer drainage structure as claimed in claim 2, wherein: a plurality of water collecting tanks (15) are buried downwards at the joints of the left inclined planes (13) and the right inclined planes (14), and the water collecting tanks (15) are respectively communicated with the bottom drain pipe network system (3) and the lower vacuum pump (7).
4. The vacuum preloading double-layer drainage structure as claimed in claim 3, wherein: the storage yard (1) is provided with a high ground (16), the cofferdam (2) is arranged on the high ground (16), the water collecting tank (15) is communicated with the lower vacuum pump (7) through a plastic pipe (20), the highest point of the plastic pipe (20) is a connection point with the water collecting tank (15), and the highest point of the plastic pipe (20) is higher than the lower vacuum pump (7).
5. The vacuum preloading double-layer drainage structure as claimed in claim 1, wherein: a lower sealing film (17) is paved on the yard (1) in the cofferdam (2), and the bottom drain pipe network system (3) is positioned on the lower sealing film (17).
6. The vacuum preloading double-layer drainage structure as claimed in claim 5, wherein: the cofferdam (2) is provided with a ditch (18), and the upper sealing film (8) and the lower sealing film (17) both extend into the ditch (18) and are soaked in water of the ditch (18).
7. The vacuum preloading double-layer drainage structure as claimed in claim 6, wherein: a roller (21) is arranged in the ditch (18), and the upper sealing film (8) and the lower sealing film (17) both bypass the bottom of the roller (21) and extend out of the ditch (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020215169.XU CN211849391U (en) | 2020-02-20 | 2020-02-20 | Vacuum pre-compaction double-layer drainage structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020215169.XU CN211849391U (en) | 2020-02-20 | 2020-02-20 | Vacuum pre-compaction double-layer drainage structure |
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| Publication Number | Publication Date |
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| CN211849391U true CN211849391U (en) | 2020-11-03 |
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| CN202020215169.XU Active CN211849391U (en) | 2020-02-20 | 2020-02-20 | Vacuum pre-compaction double-layer drainage structure |
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