CN1858366A - Internal support net sheet type pressure reducing well pipe - Google Patents
Internal support net sheet type pressure reducing well pipe Download PDFInfo
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- CN1858366A CN1858366A CN 200610039164 CN200610039164A CN1858366A CN 1858366 A CN1858366 A CN 1858366A CN 200610039164 CN200610039164 CN 200610039164 CN 200610039164 A CN200610039164 A CN 200610039164A CN 1858366 A CN1858366 A CN 1858366A
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- net sheet
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- outer tube
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Abstract
The internally supported net sheet type pressure reducing well pipe consists of porous outer pipe, filtering layer and inside pipe. The inside pipe is one ring internally supported net structure comprising four net sheets and has in the center support link rods and driving shaft. There are three layers of support link rods and four link rods each layer, and each of the support link rods has one end connected to the net sheets and the one end connect to the driving shaft to form umbrella rib like structure. When the driving shaft is upward lifted, the support link rods are contracted; and when the driving shaft is downward pressed, the link rods drive the net sheets to open and the filter layer on the net sheets contacts closely to the inner wall of the outer pipe. In case of the filter layer is blocked, the driving shaft is lifted to contract the net sheets and the filter layer may be replaced. The well pipe structure has reasonable structure and obvious pressure reducing effect.
Description
One, technical field
The present invention relates to the dykes and dams Foundation Design, specifically relate to reduce the internal support net sheet type pressure reducing well pipe of dykes and dams base low layer seepage water pressure.
Two, background technology
A large amount of dykes and dams destroy to such an extent that the example survey data shows both at home and abroad, because the disaster that seepage flow causes accounts for whole accident and gets about 40%, the piping of the disaster form of expression such as dike (dam) body, dike (dam) base, stream soil, crack, collapse on the bank etc., and wherein piping, stream soil directly are because osmotic pressure, big of osmotic gradient cause.According to estimates, during the great flood of basin, the Changjiang river in 1998, take place in the dangerous situation, the dangerous situation that infiltration directly causes accounts for 70%, failure by piping is the most outstanding again.
People have created the control techniques measure of oozing of a lot of effective antiseepages, drainage and step-down in the long-term practice of hydraulic engineering and in the seepage flow control theory, Study on Technology, the osmotic pressure that reduces dykes and dams basis and downstream is to guarantee the safety of engineering.Wherein when dike (dam) base covering layer top down be aquitard, bottom when being the binary of highly permeable layer or polynary soil structure, adopt the basic osmotic stability of relief well technology control more.What adopt at first that relief well prevents that dykes and dams bases from excessive uplift pressure taking place is CE, US Army, in of the additional measure of nineteen forty-two Montana State Ford Parker dam employing relief well as seepage flow control, effect is fine, make the toe hydrostatic pressure reduce to 5 feet by 45 feet, this technology is promoted gradually later on.Adopt not only economy but also can reduce the uplift pressure in the basic downstream of dike (dam) effectively of relief well technology, therefore along the Yangtze River, many dike sections downstream of rivers Hu Di such as Hubei Jingjiang levees, Jiujiang embankment and Guangdong San Shuibei Jiang Dadi is equipped with relief well.But a large amount of practical situations show, because originally there is defective in traditional relief well in design, structure, materials and management, make the efficient of relief well and application life not satisfactory, wherein because the segregation that relief well gravel filtrate produces when the construction filler.Difficult quality control usually stays hidden danger, the service efficiency and the application life of relief well are had a greatly reduced quality, as some embankment downstream relief wells of Hubei, Jiujiang service lives about about 1-3, many mouthfuls of relief wells have been built in Bei Jiang embankment stem of noble dendrobium dangerous section, Guangdong, fail to bring into play the effect that its row is oozed decompression with regard to some well more than a year; The efficient of U.S.'s Mississippi embankment relief well in the reduction of 15 years three/the last one, check result thinks it mainly is due to fouling is stopped up in the gravel loaded filter.
One of modal failure cause of relief well is the filter material generation silting of filling in the well, and whether this silting takes place mainly to see whether filter material grating and levee foundation soil particle mate, if filtrate and protected native matching relationship are bad, silting just takes place easily how much.Also the mineralogical composition in some ground stratum is dissolved in the water, and produces new compound between soluble salt that contains in the underground water that flows and the various chemical substance under the certain environment temperature, is deposited in the filtering layer, just may produce chemical silting.At some low flow velocity, under the water environment of oxygen rareness, also can produce new biological microorganism, its metabolin can be with the seepage channel silting, as the metabolin of eating the anaerobic bacteria of iron, food sulphur just found once in the water-supply-pipe of Lion Rock tailing dam that this sometimes biology also can quicken chemical silting.See at most in the dam construction at present, the most incident still how much siltings, it reduces the relief well effect even lost efficacy, the use that has in the practical application 1 year was perhaps also just lost efficacy (relief well has moved for many years also to have minority to build preferably) in two to three years.Because relief well is darker, by silting filter material be difficult to even can't take out, also once attempted the water under high pressure backwash, but effect is unsatisfactory, usually can only let alone to lose efficacy.For engineering safety, to have to reconstruct, a bite well cost often needs 2-3 about ten thousand, so not only cause dam construction spacecraft long-term operation management expense to improve greatly, and (dam) engineering is very dangerous to make dike again.People are seeking new levee foundation seepage flow control processing method for this reason, wherein cut-off wall is one of major measure of current popular, just not saying but various impervious wall oozes Jiang Di its cost height of the practice that blocks, a large amount of employings back is opened with regard to its long-term consequence and is seen, may cause ecological environment to change and deterioration, this is very noticeable.
Three, summary of the invention
The object of the present invention is to provide a kind of internal support net sheet type pressure reducing well pipe, this well casing have promote in tube side just, change advantages such as to stop up filtration beds easy, and infiltration is fast, and effect of easing stress is obvious.
Internal support net sheet type pressure reducing well pipe, by outer tube, interior pipe, filtration beds is formed, pipe is by four annular internal brace network structures that identical net sheet is formed that separate in it is characterized in that, the interior central authorities of managing are provided with support link and force transmission shaft, support link is divided upper, middle and lower-ranking, every layer of four connecting rod, hinge is equipped with at two ends four support link, and an end hinge is separately fixed on four arc net sheets, and other end hinge is separately fixed on the force transmission shaft, in being placed on, filtration beds between pipe and the outer tube, is close on the outer tube wall.
The basic structure of internal support net sheet type pressure reducing well pipe:
This well casing is formed by managing in outer tube+geotextile filtration beds+internal support net sheet type.
Because there is the shortcoming of underaction in pipe turgor pressure formula pressure reducing well pipe structure in the fluting in operation, on the basis that keeps the well casing three layer construction, four net sheets that interior pipe is changed into separation assemble and constitute ring-like inner bearing type separate mesh chip architecture, and interior pipe central authorities are provided with support link and force transmission shaft.Carry on the force transmission shaft and can draw support link in, four net sheets constitute the interior pipe that diameter is less, can be enclosed within the geotextile filtration beds periphery of net sheet this moment, together insert in the outer tube, after interior pipe puts in place, to pressing down (similar rim structure of umbrella), net sheet turgor pressure is strutted by force transmission shaft, support link props up the net sheet, and the net sheet is pressed to outer tube wall with the geotextile filtration beds.Use is stopped up when filtration beds long afterwards, during the infiltration weak effect, as long as promote force transmission shaft, draw support link and net sheet in, just can put forward interior pipe, new filtration beds is enclosed within the periphery of net sheet, insert outer tube again, press down force transmission shaft, can press to outer tube wall to filtration beds by the net sheet.
Internal support net sheet type pressure reducing well pipe of the present invention, through evidence, this well casing have promote in tube side just, it is easy to change filtration beds, infiltration is fast, effect of easing stress is good, and parts can suitability for industrialized production, has saved spending greatly.
Four, description of drawings
The schematic diagram of Fig. 1 internal support net sheet type pressure reducing well pipe;
The sectional drawing of Fig. 2 internal support net sheet type pressure reducing well pipe;
Reference numeral: pipe, 4-support link, 5-force transmission shaft, 6-net sheet in 1-outer tube, 2-filtration beds, the 3-.
Five, the specific embodiment
Outer tube is a PVC porous floral tube, internal diameter is 100mm, and the aperture of aperture is 20mm on the outer tube, pitch of holes 80mm, the long 4m of outer tube single-unit, outer tube is inserted in the native hole of having accomplished fluently, and interior external diameter of pipe is 95mm, long 4m, the lonely shape net of interior Guan Yousi piece sheet constitutes, its net sheet is to be pressed into circular arc by the laminated plastics net, and mesh is hexagon, and mesh diameter is 20mm, the interior central authorities of managing are provided with support link and the force transmission shaft that the PVC material is made, on support link is divided, in, lower floor, 4 every layer, respectively with the hinge at support link two ends, one end is welded on the net sheet, the weld of net sheet plastic sheet reinforcement of weld, the other end is welded on the force transmission shaft, the geotextile filtration beds of making is enclosed within the periphery of net sheet, push in the outer tube with force transmission shaft, when force transmission shaft presses down, by support link the net sheet is opened, filtration beds is pressed on the outer tube wall.When needs are changed filtration beds, as long as force transmission shaft is upwards put forward receipts, just can take out the ring-like interior pipe that the separate mesh sheet is formed, new filtration beds is enclosed within net sheet periphery inserts in the outer tube, press down force transmission shaft, the net sheet just opens, and filtration beds is pressed on outer tube wall.
Claims (4)
1. internal support net sheet type pressure reducing well pipe, form by outer tube (1), filtration beds (2), interior pipe (3), it is characterized in that interior pipe (3) is the annular internal brace network structure that is made of the four net sheets (6) that separate, central authorities at interior pipe (3) are provided with support link (4) and force transmission shaft (5), support link (4) one ends connect net sheet (6), the other end connects on the force transmission shaft (5), and filtration beds (2) is placed between interior pipe (3) and the outer tube (1), is close on the inwall of outer tube (1).
2. internal support net sheet type pressure reducing well pipe according to claim 1, it is characterized in that described support link (4) branch upper, middle and lower-ranking, every layer of four connecting rod, hinge is equipped with at two ends in four support link (4), one end hinge is separately fixed on four net sheets (6), the junction plastic sheet reinforcement of weld of hinge and net sheet, other end hinges fixing fixes on the force transmission shaft (5).
3. internal support net sheet type pressure reducing well pipe according to claim 1 is characterized in that described outer tube (1) is the porous floral tube, and the aperture of its aperture is 20mm, and pitch of holes is 80mm, makes with the PVC plastics, and the internal diameter of outer tube (1) is 20-50cm, the long 4cm of single-unit.
4. internal support net sheet type hydraulic pressure well casing according to claim 1 is characterized in that described net sheet (6) is to be pressed into circular arc by the laminated plastics net, and mesh is hexagon, and mesh diameter is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039164 CN1858366A (en) | 2006-03-29 | 2006-03-29 | Internal support net sheet type pressure reducing well pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610039164 CN1858366A (en) | 2006-03-29 | 2006-03-29 | Internal support net sheet type pressure reducing well pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1858366A true CN1858366A (en) | 2006-11-08 |
Family
ID=37297317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610039164 Pending CN1858366A (en) | 2006-03-29 | 2006-03-29 | Internal support net sheet type pressure reducing well pipe |
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| Country | Link |
|---|---|
| CN (1) | CN1858366A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107469469A (en) * | 2017-08-24 | 2017-12-15 | 河南中烟工业有限责任公司 | A kind of central air-conditioning filter cylinder cleaning device |
| CN110281514A (en) * | 2019-08-02 | 2019-09-27 | 徐良杰 | A kind of plastic products cooling and shaping equipment |
-
2006
- 2006-03-29 CN CN 200610039164 patent/CN1858366A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107469469A (en) * | 2017-08-24 | 2017-12-15 | 河南中烟工业有限责任公司 | A kind of central air-conditioning filter cylinder cleaning device |
| CN110281514A (en) * | 2019-08-02 | 2019-09-27 | 徐良杰 | A kind of plastic products cooling and shaping equipment |
| CN110281514B (en) * | 2019-08-02 | 2021-12-03 | 曾婧 | Cooling and shaping equipment for plastic products |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |