CN210395307U - Prefabricated strainer from area hierarchical filtering capability - Google Patents
Prefabricated strainer from area hierarchical filtering capability Download PDFInfo
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- CN210395307U CN210395307U CN201921098036.2U CN201921098036U CN210395307U CN 210395307 U CN210395307 U CN 210395307U CN 201921098036 U CN201921098036 U CN 201921098036U CN 210395307 U CN210395307 U CN 210395307U
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Abstract
The utility model discloses a prefabricated water strainer with a grading filtration function, which comprises a flexible geotextile filter layer, a permeable concrete filter layer and a hollow water guiding flower pipe, wherein the permeable concrete filter layer is annularly and uniformly wrapped on the outer side of the hollow water guiding flower pipe; the pervious concrete filtering layer is of a honeycomb structure with uniform pores and is used for filtering coarse particles in water; the flexible geotextile filter layer has smaller pore diameter and higher pore density, and can filter soil particles with smaller particle size in underground water on the premise of not influencing water permeation efficiency. The combination of the above parts in the radial direction forms the utility model discloses a graded filtering system, has the integration function of drainage, drainage.
Description
Technical Field
The utility model relates to a strainer, especially a prefabricated strainer from area stage filtration function.
Background
When the underground drainage gallery collects underground water in surrounding rock-soil bodies, some seepage pipes are generally installed in a radiation mode to a deep stratum in order to improve water collection capacity. In addition, in order to reduce the adverse effect of the groundwater on the slope stability in the slope engineering, some drainage holes or drainage pipes are reserved on the supporting structure to lead out the groundwater behind the supporting structure. In the process of discharging underground water from the interior of rock-soil body, a large amount of soil particles are often carried by water flow and escaped to cause water loss and soil erosion, and in order to avoid these adverse phenomena, the method adopted at present is that a certain scale of sandstone materials or filter material bags are embedded near the supporting structure, the water drain hole on the upstream surface (outside) of the underground gallery or around the water filter pipe to be used as a filter layer. However, such engineering measures often require excavation work on the outer side of the structure, and in many cases, construction conditions are not provided. For example, the slope top of a certain slope engineering in Hunan province is a cultural layer of a national key cultural relic protection unit, a covering layer contains numerous historical information, excavation conditions are not available, and filter packs cannot be buried in the upstream face of a retaining wall; another example is: the design of Jiangsu underground drainage engineering has the infiltration pipe at underground piping lane top, if set up the reversed filter layer in the infiltration pipe outside, excavation work load is huge.
In addition, due to the fact that technical levels and strictness degrees of construction units are different, the phenomenon that the size of a filter material bag is insufficient, aggregate grading of a reverse filter layer is unreasonable and the like exists in a large number of engineering practices, the reverse filter layer cannot achieve an ideal effect, and the condition that silt escapes from a water drainage hole along with water loss exists in a large number. Meanwhile, the fine soil particles often block the pores in the reverse filter layer in the long-term migration process, the hidden reverse filter layers cannot be cleaned and replaced, and the drainage holes are often blocked to lose the drainage effect after a long time.
SUMMERY OF THE UTILITY MODEL
For can't set up anti-filter bed in solving these engineerings, anti-filter bed construction quality differs, the unable washing of anti-filter bed is changed and is leaded to engineering technical problem such as permanent inefficacy, the utility model provides a prefabricated strainer pipe of taking hierarchical filtering capability certainly utilizes the material and the rigid flexible material of the difference permeating water to arrange at radial ascending layering, reaches the effect of drainage, drainage. The filter pipe can be cleaned and is simple to disassemble and assemble, and the technical problem that the anti-filtration layer fails for a long time is solved.
In order to solve the technical problem, the utility model discloses a technical scheme is: the prefabricated water filter pipe with the graded filtering function comprises a flexible geotextile filter layer, a permeable concrete filter layer and a hollow water guide flower pipe, wherein the permeable concrete filter layer is uniformly wrapped on the outer side of the hollow water guide flower pipe in an annular mode, the flexible geotextile filter layer is wound on the outer side of the permeable concrete filter layer, micropores are distributed on the pipe wall of the hollow water guide flower pipe, the pore diameter of each micropore is not larger than the minimum particle diameter of permeable concrete aggregate of the permeable concrete filter layer, the thickness of the permeable concrete filter layer is not smaller than 2cm, and the pore diameter and the pore density of the flexible geotextile filter layer are smaller than those of the permeable concrete filter layer and are not smaller than 5 mm.
The hollow water guide perforated pipe is made of a hard polyvinyl chloride pipe, and the outer pipe wall is polished to be rough so as to increase the bonding strength with the permeable concrete filter layer.
The flexible geotextile filter layer adopts polyester staple fiber or polypropylene staple fiber made by a needle punching method.
The two ends of the hollow water guide flower tube are respectively provided with a direct inner screw thread and a direct outer screw thread, and the hollow water guide flower tube realizes the sectional connection of the water filter tube by utilizing the tail-closing connection of the inner screw thread and the outer screw thread.
The utility model has the advantages that: the utility model discloses replace traditional wash port, drainage pipe, the combined action of anti-filtering layer with the strainer pipe from taking filtering capacity, simplified construction process greatly, avoided big excavation and the construction of earth and stone side. The pipeline filtering system formed by combining the flexible geotextile filtering layer and the pervious concrete filtering layer can adjust parameters aiming at soil quality, and meets the reverse filtering requirement under various conditions. And the water filter pipes are processed and manufactured in batches and are transported to a field for installation, so that the quality controllability is high. The utility model discloses the mounting means is pore-forming-installation, can dismantle the change, can wash by the pressurized-water, maintains simply, can effectively solve the problem that traditional inverted filter became invalid and be difficult to the recovery, makes engineering life-span obtain the extension.
Drawings
Fig. 1 is a schematic structural diagram of a prefabricated water filter pipe with a graded filtering function according to the present invention;
fig. 2 is a schematic cross-sectional structure diagram of the prefabricated water filter pipe with a graded filtering function of the present invention;
FIG. 3 is a structural view of the end of the water filtering pipe of the present invention;
FIG. 4 is a structural view of the connection part of the present invention during sectional installation;
FIG. 5 is a schematic view of the installation of the present invention in an underground drainage corridor;
fig. 6 is the utility model discloses the installation schematic diagram in retaining wall support engineering.
In the figure: 1. the water-permeable concrete water-retaining wall comprises a flexible geotextile filter layer, 2 a permeable concrete filter layer, 3 a hollow water-guiding perforated pipe, 4 a pipe plug, 5 a direct inner screw thread, 6 a direct outer screw thread, 7 a reducing joint, 8 a pressure hose, 9 a pressure water injection device, 10 a natural ground, 11 a water-filtering pipe for a drainage gallery, 12 a water-containing stratum, 13 a gallery lining and 14 a retaining wall.
Detailed Description
The invention will be described in further detail with reference to the following drawings and embodiments:
as shown in fig. 1-2, the utility model discloses a prefabricated strainer of hierarchical filtering capability of taking certainly, including flexible geotextile filtering layer 1, the concrete filtering layer 2 and the hollow water guide flower pipe 3 of permeating water, the concrete filtering layer 2 that permeates water is the even parcel of cyclic annular in the 3 outsides of hollow water guide flower pipe, and the winding of flexible geotextile filtering layer 1 is in the concrete filtering layer 2 outsides of permeating water, be covered with the micropore on the 3 pipe walls of hollow water guide flower pipe, the aperture of micropore is not more than the concrete aggregate minimum particle diameter that permeates water of the concrete filtering layer 2, and the concrete filtering layer 2 thickness that permeates water is not less than 2cm, and the pore diameter and the pore density ratio of flexible geotextile filtering layer 1 permeate water concrete filtering layer 2 littlely, and thickness is not less than 5 mm.
The hollow water guide perforated pipe 3 is a hard polyvinyl chloride pipe, and the outer pipe wall is polished to be rough so as to increase the bonding strength with the permeable concrete filter layer 2.
The flexible geotextile filter layer 1 is made of polyester staple fibers or polypropylene staple fibers by a needle punching method.
The two ends of the hollow water guide floral tube 3 are respectively provided with a direct inner screw thread 5 and a direct outer screw thread 6, and the hollow water guide floral tube 3 can realize the sectional connection of the filter tubes by utilizing the ending connection of the inner screw thread and the outer screw thread.
The hollow water guide flower pipe is a main water guide channel of the filter pipe and is also a water pressing pipeline when the filter layer is cleaned; the pervious concrete filtering layer is of a honeycomb structure with uniform pores and is used for filtering coarse particles in water; the flexible geotextile filter layer has smaller pore diameter and higher pore density, and can filter soil particles with smaller particle size in underground water on the premise of not influencing water permeation efficiency. The combination of the above parts in the radial direction forms the utility model discloses a graded filtering system, has the integration function of drainage, drainage.
The concrete description is as follows:
1. hollow water guide floral tube: the pipe is made of hard polyvinyl chloride pipe, the pipe diameter can be adjusted according to the requirement, and the pipe wall is polished roughly to increase the bonding strength with the outer side filter layer. The pipe wall is provided with high-density micropores, the aperture is not larger than the minimum particle size of the pervious concrete aggregate, and the hollow water guide floral pipe is a main channel for water collection and water guide of the water filter pipe and is also a water pressing pipeline during high-pressure cleaning of the filter layer.
2. Permeable concrete filtering layer: the annular structure is formed by pouring strong permeable concrete in situ. The strong permeable concrete is a high porosity concrete prepared by mixing graded aggregate particles, cement, water and an added reinforcing agent. The coarse-grained aggregate slurry is bonded to form a honeycomb structure with uniform pores by adjusting the proportion, so that the honeycomb structure has the characteristics of ventilation and water permeability, and simultaneously meets the function of filtering coarse particles in water to a certain extent. Meanwhile, the porosity, the minimum pore diameter, the water permeability and the filtration scale of the material can be changed within a large range by adjusting the particle size and the grading of the aggregate. The strong permeable concrete filter layer is annularly and uniformly coated on the outer side of the inner ring hollow water guide perforated pipe, has the thickness of not less than 2cm, is not only a water guide channel of the filter pipe, but also a core filter layer.
3. Flexible geotextile filter layer: the polyester staple fiber or the polypropylene staple fiber is prepared by a needle punching method, and has the characteristics of acid and alkali resistance, corrosion resistance, aging resistance, high strength, stable size, good air permeability, good water permeability, good filterability and the like. As a direct contact part of the water filter pipe and the drainage hole (or stratum), the layer has smaller pore diameter and higher pore density compared with a permeable concrete filter layer, and can filter soil particles with smaller particle size in underground water on the premise of not influencing the water permeability efficiency. Thereby achieving the effect of graded filtration together with the pervious concrete filter layer in the radial direction. In addition, the flexible geotextile filter layer has considerable thickness (can reach 5mm), and the flexible characteristic can effectively solve the problem that the installation is difficult or the installation has spaciousness when the water strainer is installed because of the pore-forming construction error. Meanwhile, the flexible layer greatly reduces the operation difficulty of dismantling and replacing the water filter pipe in the service life, and the water filter pipe can be replaced after the compact pore structure is filled with soil particles and the water permeability is reduced, and the cost is low.
As shown in FIG. 3, the standard strainer for drainage gallery has inner and outer threads at its two ends. Every two standard components can be butted and lengthened by utilizing screw threads. The fittings comprise a pipe plug and a reducer union with matched screw threads, and are respectively used for the pipe head plug 4 of the most front section and the most tail section to be connected with a pressure hose and pressure water injection equipment.
The diameter and the single-section length of the drainage gallery water filter pipe can be adjusted according to design requirements, and the drainage gallery water filter pipe can be butted and combined according to requirements, and is convenient to assemble and disassemble. After the start-tail section is in threaded connection with the reducer pipe and the pressure hose which are matched, pressurized water cleaning can be realized, soil particles attached to the filter layer are taken away by utilizing reverse osmosis of high-pressure water, and the cleaning mode is simple and strong in operability.
As shown in fig. 4-6, the utility model discloses can install in drainage corridor lining cutting 13, side slope supporting structure, like in the drainage hole of retaining wall 14 to can arrange in around in the soil body 12 certain degree of depth, be arranged in the drainage efficiency of groundwater in the improvement soil body, play the effect of filtering aquatic particulate matter simultaneously.
The prefabricated water filter pipe with the grading filtering function comprises the following parameters and manufacturing steps:
1. making hollow water-guiding floral tubes
Selecting DN75mm hard polyvinyl chloride pipe, drilling holes with the diameter of 5mm on the pipe wall, the hole spacing of 20mm, arranging in a quincunx manner, roughening the outer wall of the pipe by using fine sand paper, and screwing the pipe into a plug.
2. Mixing pervious concrete
Coarse aggregate: selecting crushed stone with nominal grain diameter of 3 mm-5 mm, and screening the crushed stone by using a square hole sieve with the sieve pore specification of 2.36mm and the sieve pore of 4.75 mm;
cement: selecting common Portland cement;
additive: selecting a general permeable concrete reinforcing agent on the market;
water: tap water;
the mixing ratio is as follows: the water, cement, permeable concrete reinforcing agent (Nanjing good environment ecological permeable concrete reinforcing agent) and pebble are 1: 3: 1: 15, the mixture is uniformly wrapped, no obvious laitance is generated, the mixture can be agglomerated by hand grasping, and the porosity of a consolidation body is 10-15%.
3. Pouring permeable concrete filter layer
And pouring a permeable concrete filter layer which is annularly and uniformly coated outside the hollow water guide floral tube, wherein the outer die is made of DN110mm hard PVC tube, and two ends of the outer die are centered and positioned to ensure that the outer die is concentric with the hollow water guide floral tube. And the maintenance standard of the pervious concrete filter layer is the same as that of common concrete.
4. Wrapped geotextile filter layer
Selecting 400g/m2The thickness is more than or equal to 3.0mm, and the equivalent aperture is more than or equal to 1.0 multiplied by 10-2Weaving the cm/s geotextile into a bag shape, and sleeving the bag shape into the formed filter pipe.
The installation and implementation steps are as follows:
1. installing and positioning: typically at the top of the drainage gallery 13, at the level of the arch line or at a certain height of the retaining wall 14, along the axis, with a spacing determined by the permeability of the formation, which may typically be around 1 m.
2. Drilling and cleaning: the corresponding mounting part of the supporting structure should be reserved with a drain hole or a water drill hole which meets the use requirement. A spiral drilling tool can be adopted to take soil and form holes in the stratum 12, the aperture is slightly larger than the outer diameter of the permeable concrete filter layer 2 by 5-10mm, and slag and soil in the holes are removed after the holes are formed.
3. Installing a strainer: the strainer 11 is inserted into the drilled hole after construction, and the strainer 11 can be manufactured in sections and installed section by section for the hole depth larger than the effective height in the gallery. Wherein, the end part of the water filtering pipe 11 at the most front end is blocked by a pipe block 4, and the water filtering pipe 11 at the middle section is butted by an inner screw thread 5 and an outer screw thread 6 at the head and the tail ends in sequence.
4. Replacement and cleaning: because the utility model discloses strainer installation pore-forming aperture slightly is greater than its rigidity diameter, relies on outer flexible geotextile filter layer 1 of soil body compression around to provide the restraint, consequently dismantles simply. Only the component 7 with the matched thread is screwed into the thread at the tail part of the strainer pipe and is pulled out in the forward direction. When cleaning, the reducer pipe 7 with the matched screw thread is screwed into the tail end of the water filter pipe 11, the pressure hose 8 and the pressure water injection device 9 are connected, and water is pressed in the water filter pipe. The water flow in the reverse osmosis of the confined water in the pipe is used for taking away the soil particles retained in the pores of the filter layer, thereby achieving the purpose of cleaning. Meanwhile, the outer layer flexible geotextile filter layer 1 can be replaced when necessary, and the cost is low.
The above-mentioned embodiments are only used for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, the scope of the present invention should not be limited by the embodiment, that is, all equivalent changes or modifications made by the spirit of the present invention should still fall within the scope of the present invention.
Claims (4)
1. The utility model provides a prefabricated strainer of taking hierarchical filtering capability certainly which characterized in that, includes flexible geotextile filter bed (1), the concrete filter bed (2) that permeates water and hollow water guide floral tube (3), and the concrete filter bed (2) that permeates water is the cyclic annular even parcel in the outside of hollow water guide floral tube (3), and flexible geotextile filter bed (1) twines in the concrete filter bed (2) that permeates water outside, be covered with the micropore on hollow water guide floral tube (3) pipe wall, the aperture of micropore is not more than the concrete aggregate minimum particle diameter that permeates water of the concrete filter bed (2), and the concrete filter bed (2) that permeates water thickness is not less than 2cm, and the pore diameter and the pore density of flexible geotextile filter bed (1) are less than the concrete filter bed (2) that permeates water, and thickness is not less than 5 mm.
2. The prefabricated water filter pipe with the graded filtering function according to claim 1, wherein the hollow water guide floral tube (3) is a hard polyvinyl chloride tube, and the outer wall of the hollow water guide floral tube is roughened to increase the bonding strength with the pervious concrete filter layer (2).
3. The prefabricated drainpipe with graded filtering function according to claim 1, wherein the flexible geotextile filter layer (1) is made of needle punched polyester staple fiber or polypropylene staple fiber.
4. The prefabricated drainpipe with the graded filtering function according to claim 1, wherein the hollow water guiding floral pipe (3) is provided with a direct inner screw thread (5) and a direct outer screw thread (6) at two ends respectively, and the hollow water guiding floral pipe (3) realizes the sectional connection of the drainpipe by utilizing the inner and outer screw thread tail connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921098036.2U CN210395307U (en) | 2019-07-12 | 2019-07-12 | Prefabricated strainer from area hierarchical filtering capability |
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| CN201921098036.2U CN210395307U (en) | 2019-07-12 | 2019-07-12 | Prefabricated strainer from area hierarchical filtering capability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295587A (en) * | 2019-07-12 | 2019-10-01 | 中国电建集团北京勘测设计研究院有限公司 | A kind of filter pipe of prefabricated included classified filtering function |
| CN112523241A (en) * | 2020-12-21 | 2021-03-19 | 上海长凯岩土工程有限公司 | Horizontal well-forming foundation pit dewatering process |
-
2019
- 2019-07-12 CN CN201921098036.2U patent/CN210395307U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295587A (en) * | 2019-07-12 | 2019-10-01 | 中国电建集团北京勘测设计研究院有限公司 | A kind of filter pipe of prefabricated included classified filtering function |
| CN112523241A (en) * | 2020-12-21 | 2021-03-19 | 上海长凯岩土工程有限公司 | Horizontal well-forming foundation pit dewatering process |
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