CN215441855U - Earth surface drainage system suitable for vacuum preloading soft foundation reinforcement - Google Patents
Earth surface drainage system suitable for vacuum preloading soft foundation reinforcement Download PDFInfo
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- CN215441855U CN215441855U CN202120943331.4U CN202120943331U CN215441855U CN 215441855 U CN215441855 U CN 215441855U CN 202120943331 U CN202120943331 U CN 202120943331U CN 215441855 U CN215441855 U CN 215441855U
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Abstract
The utility model discloses a surface drainage system suitable for vacuum preloading soft foundation reinforcement, which comprises a sand cushion layer, a soft soil foundation positioned below the sand cushion layer, a vacuum film laid on the surface of the sand cushion layer, a plurality of drainage filter pipes which are equidistantly distributed in the sand cushion layer, one ends of the drainage filter pipes are embedded at the bottom of the sand cushion layer along the horizontal direction, the other ends of the drainage filter pipes penetrate through the vacuum film, a non-woven geotextile sleeved on the outer surfaces of the drainage filter pipes, a vacuum pump communicated with one ends of the drainage filter pipes penetrating through the vacuum film, and a plurality of drainage plates which are uniformly distributed along the axial direction of the drainage filter pipes, one ends of the drainage filter pipes are connected with the non-woven geotextile, and the other ends of the drainage plates extend into the soft soil foundation. The utility model has good drainage effect, effectively prevents water in the pipe from seeping back, and has very high practical value and popularization value in the field of geotechnical engineering.
Description
Technical Field
The utility model relates to the technical field of geotechnical engineering, in particular to a surface drainage system suitable for vacuum preloading soft foundation reinforcement.
Background
The soft soil is fine soil with a soil body pore ratio e of more than or equal to 1.0 and a natural water content w of more than a liquid limit wL, and is widely distributed on coastal plains, estuary delta, around lake basin lands and mountain valley bottoms in China. Because a large amount of pore water exists in the soil body of the soft soil foundation, and the strength of the particle framework of the soft soil foundation is small, the water permeability is poor, and the soft soil as the engineering foundation has the characteristics of low bearing capacity and large sedimentation deformation.
The vacuum preloading is to apply vacuum load in the closed soft soil foundation space, and reduce the pore water pressure in the soil under the condition of constant total stress by utilizing the air pressure difference formed inside and outside the space and the vertical drainage channel arranged in the soft soil so as to achieve the purpose of improving the effective stress of the soil body. The vacuum preloading consists of three parts, namely a drainage system, a vacuum system and a sealing system. During construction, firstly, a waterproof sealing wall with a certain depth is constructed at the boundary of a construction area, a sand bed and a filter pipe are laid along the ground after a sand well or a plastic drainage belt and other vertical drainage channels are arranged in the area, and then a layer of airtight sealing film is covered on the top of the sand bed to isolate a reinforced soil body from the atmosphere. Through the filter tube buried in the sand cushion layer, the vacuum device is used for pumping air to form the pressure difference between the inside and the outside of the membrane, and the pore water in the soil body is discharged along the vertical drainage channel and the horizontal drainage channel on the earth surface by utilizing the atmospheric pressure so as to fulfill the aim of solidifying and reinforcing the soft soil foundation by drainage.
However, in the traditional vacuum preloading process, a large amount of pore water in the soft soil enters the sand cushion layer arranged on the ground surface through the vertical sand well or the drainage plate, and then is drained through the full-section water-permeable filter pipe arranged in the middle of the sand cushion layer. The full-section permeable filter pipe can absorb pore water in all directions of the sand cushion layer in the drainage process, but the defect that water in the filter pipe leaks and flows back to the sand cushion layer again to be retained exists, so that the transverse drainage performance is poor, and the consolidation drainage treatment effect is finally influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems, the utility model aims to provide a ground surface drainage system which has good drainage effect and can prevent water in a pipe from seeping back and is suitable for vacuum preloading soft foundation reinforcement, and the technical scheme adopted by the utility model is as follows:
a surface drainage system suitable for vacuum preloading soft foundation reinforcement comprises a sand cushion layer, a soft soil foundation positioned below the sand cushion layer, a vacuum film laid on the surface of the sand cushion layer, a plurality of drainage filter pipes which are equidistantly arranged in the sand cushion layer, one ends of the drainage filter pipes are embedded at the bottom of the sand cushion layer along the horizontal direction, the other ends of the drainage filter pipes penetrate through the vacuum film, a non-woven geotextile sleeved on the outer surface of the drainage filter pipes, a vacuum pump communicated with one ends of the drainage filter pipes penetrating through the vacuum film, a plurality of drainage plates which are uniformly arranged along the axial direction of the drainage filter pipes, one ends of the drainage filter pipes are connected with the non-woven geotextile, and the other ends of the drainage plates extend into the soft soil foundation;
it is arbitrary drainage strainer axial is provided with a plurality of equidistant distribution's drainage structures, and arbitrary drainage structure all includes the portion of permeating water and the prevention of seepage portion that set up along drainage strainer circumference, the portion of permeating water is located and is close to vacuum membrane one side, the prevention of seepage portion is located and is close to soft soil foundation one side, it sets up a plurality of holes of permeating water that lay with the annular array mode on the portion of permeating water.
The drainage filter pipes are polyethylene plastic pipes, and the distance between any two adjacent drainage filter pipes is less than or equal to 8 meters.
The water permeable part accounts for two thirds of the periphery of the drainage filter tube.
The drain board is made of plastic.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the drainage filter pipe is skillfully provided with the water permeable part at the top, the anti-seepage part at the bottom and the plurality of water permeable holes on the water permeable part, so that pore water in the sand cushion layer and the drainage plate can be ensured to smoothly enter the drainage filter pipe, and the water in the pipe can be effectively prevented from leaking from the bottom due to self weight in the process of outwards discharging.
(2) The drainage filter pipe is skillfully changed from the existing drainage filter pipe arranged in the middle of the sand cushion layer to be arranged at the bottom of the sand cushion layer, so that the water collection effect of the drainage filter pipe can be improved, and pore water in the sand cushion layer can be drained out of the construction range as soon as possible.
The utility model has good drainage effect, effectively prevents water in the pipe from seeping back, and has very high practical value and popularization value in the field of geotechnical engineering.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope of protection, and it is obvious for those skilled in the art that other related drawings can be obtained according to these drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the drainage filter tube of the present invention.
In the drawings, the names of the parts corresponding to the reference numerals are as follows:
10. a vacuum film; 20. a sand cushion layer; 30. a drainage filter tube; 31. water permeable holes; 32. non-woven geotextile; 40. soft soil foundation; 41. a drain plate; 50. a vacuum pump.
Detailed Description
To further clarify the objects, technical solutions and advantages of the present application, the present invention will be further described with reference to the accompanying drawings and examples, and embodiments of the present invention include, but are not limited to, the following examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Examples
As shown in fig. 1 and 2, the present embodiment provides a surface drainage system suitable for vacuum preloading soft foundation reinforcement, which is characterized in that the system comprises a sand cushion layer 20, a soft soil foundation 40 located below the sand cushion layer 20, a vacuum membrane 10 laid on the surface of the sand cushion layer 20, a plurality of drainage filter pipes 30 arranged in the sand cushion layer 20 at equal intervals, one ends of the drainage filter pipes being embedded at the bottom of the sand cushion layer 20 along the horizontal direction, and the other ends of the drainage filter pipes penetrating through the vacuum membrane 10, a non-woven geotextile 32 sleeved on the outer surface of the drainage filter pipes 30, a vacuum pump 50 communicated with one ends of the drainage filter pipes 30 penetrating through the vacuum membrane 10, and a plurality of drainage plates 41 uniformly arranged along the axial direction of the drainage filter pipes 30, one ends of the drainage filter pipes being connected with the non-woven geotextile 32, and the other ends of the drainage plates extending into the soft soil foundation 40.
Specifically, the sand cushion 20 is made of medium coarse sand and has a thickness of 500 mm.
Specifically, it is arbitrary drainage strainer 30 axial is provided with a plurality of equidistant distribution's drainage structures, and arbitrary drainage structure all includes the portion of permeating water and the prevention of seepage portion that set up along drainage strainer 30 circumference, the portion of permeating water is located and is close to vacuum membrane 10 one side, prevention of seepage portion is located and is close to soft soil foundation 40 one side, the portion of permeating water is last to have seted up a plurality of holes 31 of permeating water of laying with the annular array mode.
Specifically, set up the infiltration effect that a drainage structures guaranteed the moisture in the certain limit along every interval 60mm of drainage filter tube 30 axial direction, when the hole 31 diameter of permeating water guarantees moisture for 10mm, prevent that the gravel from getting into drainage filter tube 30, adjacent hole 31 clear distance of permeating water is 20~30mm on the same section.
Specifically, the drainage filter pipes 30 are polyethylene plastic pipes, and the distance between any two adjacent drainage filter pipes 30 is less than or equal to 8 meters. It is ensured that the water in the sand bed 20 in a certain area can be sufficiently discharged.
Specifically, the water permeable portion occupies two thirds of the outer periphery of the drainage filter tube 30. The central angle corresponding to the water permeable part is 240 degrees, and the water in the sand cushion layer 20 fully enters and simultaneously limits the water in the pipe to seep back to the sand cushion layer 20. The moisture that gets into the pipeline can not the seepage and gets into sand cushion 20 again, makes sand cushion 20 be in the lower state of water content all the time for the speed and the effect of horizontal drainage.
Specifically, the drain plate 41 is made of plastic. The plastic material is light and convenient to install, and has good drainage and corrosion resistance.
The working principle of the utility model is briefly explained as follows:
the vacuum pump 50 is started to pump away the air in the drainage filter tube 30 to form a vacuum environment, and under the action of the external atmospheric pressure, pore water in the soil body vertically and upwards enters the drainage filter tube 30 through the drainage plate 41 and is pumped out by the vacuum pump 50 along the pipeline.
In the present embodiment, the terms "first", "second", and the like are used only for distinguishing the similar components, and are not to be construed as limiting the scope of protection. In the present embodiment, the terms of orientation such as "bottom", "top", "peripheral edge", "center", and the like are explained based on the drawings.
The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the scope of the present invention, but all the modifications made by the principles of the present invention and the non-inventive efforts based on the above-mentioned embodiments shall fall within the scope of the present invention.
Claims (4)
1. The ground surface drainage system suitable for vacuum preloading soft foundation reinforcement is characterized by comprising a sand cushion layer (20), a soft soil foundation (40) positioned below the sand cushion layer (20), a vacuum membrane (10) laid on the surface of the sand cushion layer (20), a plurality of drainage filter pipes (30) which are arranged in the sand cushion layer (20) at equal intervals, one ends of the drainage filter pipes are embedded at the bottom of the sand cushion layer (20) along the horizontal direction, the other ends of the drainage filter pipes penetrate through the vacuum membrane (10), a non-woven geotextile (32) sleeved on the outer surface of each drainage filter pipe (30), a vacuum pump (50) communicated with one end of each drainage filter pipe (30) penetrating through the vacuum membrane (10), a plurality of drainage plates (41) which are uniformly arranged along the axial direction of each drainage filter pipe (30), one ends of the drainage filter pipes are connected with the non-woven geotextile (32), and the other ends of the drainage plates extend into the soft soil foundation (40);
it is arbitrary drainage strainer (30) axial is provided with a plurality of equidistant distribution's drainage structures, and arbitrary drainage structure all includes the portion of permeating water and the prevention of seepage portion that set up along drainage strainer (30) circumference, the portion of permeating water is located and is close to vacuum membrane (10) one side, the prevention of seepage portion is located and is close to soft soil foundation (40) one side, it has seted up a plurality of holes (31) of permeating water of laying with the annular array mode on the portion of permeating water.
2. A surface drainage system suitable for vacuum preloading soft foundation reinforcement as claimed in claim 1, wherein the drainage filter pipes (30) are polyethylene plastic pipes, and the distance between any two adjacent drainage filter pipes (30) is less than or equal to 8 meters.
3. A surface drainage system suitable for vacuum pre-stressed soft foundation reinforcement according to claim 1, wherein the water permeable portion occupies two thirds of the outer circumference of the drainage filter tube (30).
4. A surface drainage system suitable for vacuum pre-compaction soft foundation reinforcement according to claim 1, characterized in that the drainage plate (41) is made of plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120943331.4U CN215441855U (en) | 2021-05-06 | 2021-05-06 | Earth surface drainage system suitable for vacuum preloading soft foundation reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120943331.4U CN215441855U (en) | 2021-05-06 | 2021-05-06 | Earth surface drainage system suitable for vacuum preloading soft foundation reinforcement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215441855U true CN215441855U (en) | 2022-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120943331.4U Active CN215441855U (en) | 2021-05-06 | 2021-05-06 | Earth surface drainage system suitable for vacuum preloading soft foundation reinforcement |
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| Country | Link |
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| CN (1) | CN215441855U (en) |
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2021
- 2021-05-06 CN CN202120943331.4U patent/CN215441855U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230110 Address after: No. 508, 5th floor, building 6, No. 666, jinfenghuang Avenue, Jinniu high tech Industrial Park, Chengdu, Sichuan 610000 Patentee after: Sichuan tietuo Technology Co.,Ltd. Address before: 610000 99 Golden Phoenix Road, Jinniu District, Chengdu, Sichuan. Patentee before: SICHUAN RUITIE TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |