CN103669333B - It is easy to the friction pile of vacuum-dewatering - Google Patents
It is easy to the friction pile of vacuum-dewatering Download PDFInfo
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- CN103669333B CN103669333B CN201310741227.7A CN201310741227A CN103669333B CN 103669333 B CN103669333 B CN 103669333B CN 201310741227 A CN201310741227 A CN 201310741227A CN 103669333 B CN103669333 B CN 103669333B
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- pile
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- pile body
- tube well
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Abstract
The invention discloses a kind of friction pile being easy to vacuum-dewatering, belong to slope treatment facility field, this friction pile includes: antiskid pile body and vacuum tube well；Described vacuum tube well is set in friction pile body；Vacuum tube well is arranged on the middle part of described antiskid pile body, from top to bottom through described antiskid pile body；Vacuum tube well top is provided with draw water pore and aspirating hole；Institute's vacuum tube well adopts steel thimble, and steel thimble top arranges sealing wellhead, is drainage section bottom steel thimble。This friction pile arranges vacuum tube well in the centre of antiskid pile body, under the premise of not reduction pile strength, decreasing the concrete consumption of friction pile, this antiskid pile body can the cast-in-place pile body of manually digging hole, construct simply easily operated, be the engineering measure on a kind of effective slope controlling landslide。And owing to arranging vacuum tube well, it is possible to achieve vacuum deep well precipitation discharges subsoil water, solves existing friction pile drainage effect undesirable, the problem of inconvenient operation。
Description
Technical field
The present invention relates to slope treatment facility field, particularly relate to the friction pile being easy to vacuum-dewatering used in the landslide control engineering of a kind of reservoir area。
Background technology
Friction pile is effective engineering measure of harnessing landslide, and it is, by pile peripheral earth, the embedding of stake is constructed for the stable soil body, and friction pile is widely used in slope treatment。Drainage system is also an engineering measure on preventing and treating landslide, is divided into top drainage and subdrainage。Top drainage engineering is simply easily constructed, and construction costs is low, and almost all of Harnessing of Landslide engineering all includes top drainage measure。Groundwater level Upon Slope Stability has a significant impact, and water level is more high, and Side Slope Safety Coefficient is more low, the safety of serious threat side slope。Particularly at rainy mountain area, south and various large reservoir side reservoir slope, the seepage effect of subsoil water exacerbates the Landslide hazard that side slope is potential。Mole drainage can be substantially reduced pore water pressure, increases effective normal stress thus improving skid resistance, and consolidation effect is splendid, but the large-scale draining in deep is more complex compared with top drainage。The friction pile adopted in engineering is usually reinforced concrete structure, acts primarily as anchoring, shearing resistance effect, although improve slope body stability against sliding, but the water got rid of in the body of slope is not had any effect。Compact arranged friction pile also creates the effect of cut-off wall to a certain extent, blocks the seepage channel of water in the body of slope。
At present, SanXia University Peng Hui etc. the novel driving into type friction pile of one designed, it is provided with mesopore, mesopore and the osculum UNICOM being distributed on pile body in pile body。When pile body squeezes into slope soil, in soil, press water can pass through osculum entrance mesopore discharge, both can discharge press water in the soil body, and play again anchoring or barricade effect。
Though this friction pile of above-mentioned prior art has drain function, but can only discharge press water in soil, drainage effect is inconspicuous。Owing to being the driving into type friction pile of design, pile body length is shorter, and intensity is relatively low, and soil stabilization effect is also inadequate。
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of friction pile being easy to vacuum-dewatering, large-scale reservoir area reservoir level quickly, repeatedly lifting to be likely to result in reservoir level and side slope subsoil water pressure reduction bigger, landslide is easily caused to destroy, the present invention intends adopting vacuum-dewatering technology, side slope during reservoir level rapid decrease can be reduced outer with the discrepancy in elevation of subsoil water in side slope, thus the slope instability problem that when solving fast rainfall, the inside and outside differential water pressures of side slope body is brought out greatly。
The present invention provides a kind of friction pile being easy to vacuum-dewatering, including:
Antiskid pile body and vacuum tube well；
In described friction pile body, described vacuum tube well is set；
Described vacuum tube well is arranged on the middle part of described antiskid pile body, from top to bottom through described antiskid pile body；
Described vacuum tube well top is provided with draw water pore and aspirating hole；
Described vacuum tube well adopts steel thimble, and described steel thimble top arranges sealing wellhead, is drainage section bottom described steel thimble。
The invention have the benefit that and vacuum tube well is set in the centre of antiskid pile body, under the premise of not reduction pile strength, decrease the concrete consumption of friction pile, this antiskid pile body can the cast-in-place pile body of manually digging hole, construct simply easily operated, be the engineering measure on a kind of effective slope controlling landslide。And owing to arranging vacuum tube well, it is possible to achieve vacuum deep well precipitation discharges subsoil water, solves existing friction pile drainage effect undesirable, the problem of inconvenient operation。
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below the accompanying drawing used required during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawings according to these accompanying drawings。
The structural representation of the friction pile that Fig. 1 provides for the embodiment of the present invention；
Fig. 2 be A-A in Fig. 1 to the generalized section of antiskid pile body；
The well mouth seal structure schematic diagram that Fig. 3 provides for the embodiment of the present invention；
Schematic diagram is arranged in the flange aperture of the wellhead sealing that Fig. 4 provides for the embodiment of the present invention；
Fig. 5 be B-B in Fig. 1 to the sectional view of drainage section of antiskid pile body；
Fig. 6 is arranged in the schematic diagram of bank slope for the friction pile that the embodiment of the present invention provides。
Detailed description of the invention
Below the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments。Based on embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into protection scope of the present invention。
Fig. 1,3 show the embodiment of the present invention provide a kind of friction pile being easy to vacuum-dewatering, be the friction pile facility facilitating draining in a kind of slope treatment, this friction pile includes: antiskid pile body 1 and vacuum tube well 2；
Wherein, in antiskid pile body 1, vacuum tube well 2 is set；
Vacuum tube well 2 is arranged on the middle part of antiskid pile body 1, from top to bottom through antiskid pile body 1；
Vacuum tube well 2 top is provided with draw water pore 14 and aspirating hole 15；
Vacuum tube well 2 adopts steel thimble, and steel thimble top arranges sealing wellhead 21, is drainage section 22 bottom steel thimble。Sealing wellhead 21 is set and makes to be formed in vacuum tube well 2 the well room of closed structure, it is simple to realize vacuum-dewatering。
As in figure 2 it is shown, the structure of the antiskid pile body 1 of above-mentioned friction pile is square, the steel reinforcement cage 11 fill concrete being sleeved on outside vacuum tube well the pile body 10 formed, the drainage section 12 being arranged on pile body 10 bottom and be arranged on the expansion pile head 13 of drainage section bottom and constitute；The position of drainage section 12 is corresponding with the position of the drainage section 22 of vacuum tube well 2。
As shown in Figure 3,4, in above-mentioned friction pile, the structure of the sealing wellhead 21 of vacuum tube well 2, seal sleeve 211 and the flange 212 being arranged on seal sleeve by being sleeved on steel thimble top are constituted；
Draw water pore 14 and aspirating hole 15 is arranged on flange 212。Concrete, the pore 14 that draws water can be made up of three through holes, and one is the through hole passed through for drinking-water pipe, and another two is that water pump cable aperture 16 is shown in Fig. 4 with lifting iron wire hole 17()。
As shown in Figure 5, in above-mentioned friction pile, the drainage section 22 of vacuum tube well 2 is: arrange multiple through hole on the body of one section, the bottom of steel thimble, each through hole connects a plastic tube 221 respectively and connects, plastic tube 221 passes outside antiskid pile body 1, contacting with the external soil layer of friction pile, the tube head of plastic tube 221 is provided with filter screen。Wherein, plastic tube 221 adopts external diameter to be 10mmPVC plastic straw；The filter screen that the tube head of plastic tube 221 is arranged is one layer of 80 mesh filter screen。It is possible to prevent soil to enter plastic tube blocking body。
In above-mentioned friction pile, the drainage section 12 of antiskid pile body is coated with coarse sands layer, it is simple to permeable。
As it is shown in figure 1, above-mentioned friction pile also includes: vacuum extractor 3 and water plug 4；Wherein, the exhaust tube of vacuum extractor 3 connects with in vacuum tube well 2；Water plug 4 is arranged in vacuum tube well 2, and the drinking-water pipe of water plug 2 extend out to outside vacuum tube well。Preferably, vacuum extractor 3 can adopt direct connection water-ring vacuum pump。Water plug 4 can adopt deep well submerged pump, is arranged on bottom vacuum tube well。
Below in conjunction with the drawings and specific embodiments, the invention will be further described。
The embodiment of the present invention provides a kind of friction pile, it it is the friction pile of a kind of embedded vacuum tube well, this friction pile be a kind of can the cast-in-place concrete structure of on-the-spot manually digging hole, including antiskid pile body and the vacuum tube well being embedded in sliding pile body, antiskid pile body includes pile body and stake bottom expansion pile head, vacuum tube well it is provided with in pile body, vacuum tube well is made up of steel thimble, steel thimble top is sealing wellhead, bottom is drainage section, sealing wellhead is made up of seal sleeve and the flange (as the upper flange sealing lid and the lower flange being arranged on seal sleeve) of seamless steel pipe, the mode adopting " flange+seal sleeve " seals。Drainage section is the body circumference multiple little through holes of brill at steel thimble, each through hole is all connected with plastic tube (the PVC plastic tubule of plastic tube employing external diameter 10mm), plastic tube contacts through antiskid pile body with pile soil horizon, for preventing into soil blocking, tube head one layer of 80 mesh filter screen of wrapping of plastic tube。Further, it is also possible to vacuum extractor and water plug are set, coordinate with vacuum tube well, vacuum precipitation system is formed。
This friction pile is provided with vacuum tube well owing to adopting in pile body, lower wellbore section is by the structure being connected with pile soil horizon, achieve and utilize Dewatering Technology of Vacuum Deep Well to reduce the effect of slope underground water position on the basis that opposing slope soil glides, and the problem reducing aquiclude and interface, water-bearing layer residual water that other precipitation methods cannot be accomplished can be solved, it is greatly reduced side slope soil layer pore water pressure, improves its safety factor of slope。
Respectively each several part of above-mentioned friction pile is illustrated below in conjunction with accompanying drawing。
(1) antiskid pile body structure:
Antiskid pile body is provided with the outside coarse sand surrounded of the pile body of vacuum tube well, stake bottom expansion pile head and drainage section and constitutes by inside, and pile body sectional dimension is 1.6m × 1.2m。Friction pile body length generally by touch at the bottom of stake basement rock or relatively hard stratum be as the criterion, need guiding through the potential slide surface of side slope, after manually digging hole, assembling reinforcement cage, centre fix radius be steel pipe that 200mm, length are equal with hole depth as precipitation pipe well, then limit carries dado template limit cast concrete and makes friction pile。
(11) enlarged footing at the bottom of stake:
Hole depth is dug to design hole depth, is generally stable basement rock, expansion pile head at the bottom of cleaning eye, and with relatively high-grade concrete back cover 15～20cm, mesopore pipe well takes a seat and drops on back cover。The effect of expansion pile head is to strengthen the friction pile anchor force to the soil body。
(12) stake of drainage section is outside surrounds coarse sand:
The bottom of vacuum tube well is drainage section, PVC tubule contact with surrounding soil through friction pile and forms drainage passage, and for strengthening drainage area, when section at the bottom of cast pile crown and stake, press-in coarse sand outside formwork, while carry template limit to pour into a mould concrete。A section surrounding bag at the bottom of finally making makes a circle coarse sand, makes subsoil water can easily flow in the negative pressuren zone of vacuum tube well。
Pile body bottom drainage section is according to the different position difference to some extent that lays out pile, and drainage section is located at the top of the potential slide surface of bank slope, makes the dropped subsoil water of vacuum deep well precipitation system all derive from slide surface with upward slope body。The potential slide surface form of bank slope is determined by plasticity limit analysis upper bound method analysis。
(13) pile body:
Pile body design is undertaken by " anti-slide pile design specification " requirement, so as to have certain bending strength, meets the effect improving the slip mass coefficient of stability, takes pile body sectional dimension 1600mm × 1200mm in the design。
(2) vacuum tube well:
Vacuum tube well is boring drainage section by upper wellbore section sealing wellhead, well room, lower wellbore section, is formed through the PVC plastic tubule of pile body bottom, air extractor and water plug, it is just to increase sealing and vacuum extractor with the difference of tube well dewatering device, bled by vacuum pump in the pipe well sealed, form negative pressure, Accelerating Removal subsoil water, subsoil water in the soil layer of poor permeability can also be produced active force, drainage subsoil water by negative pressure of vacuum simultaneously。
(21) well head design:
Vacuum tube well well head wants strict seal: well head adopts the mode of " flange+seal sleeve " to close, when pouring into a mould 1 meter suitable for reading to well casing of friction pile concrete, the seal sleeve 211 of the manufactured seamless steel pipe with lower flange 2111 is enclosed within outside well casing 2, seal sleeve 211 length 0.5m～1.0m, with steel thimble 2 connected mode for welding, then seal with thinner cement grout again。Upper flange 212 is 15mm steel plate, offer water pump cable aperture 16 above, the pore 14 that draws water, suspending pump iron wire hole 17 and aspirating hole 15。Make well room at friction pile pile crown, be used for laying air extractor, water plug and pipeline。
(22) well bore drainage section:
As the drainage section part of the steel pipe lower boreholes making vacuum tube well of pipe well, drainage segment length is the 25%～50% of well bore。Hole along steel pipe surrounding, bore diameter is PVC plastic tubule external diameter 10mm, pvc pipe one end is inserted in pipe well, the other end is wrapped up with 80 mesh filter screens, prevent soil particle from entering and pipe blocks current, pvc pipe extends to the hole wall soil layer of dug stake holes, and the coarse sand arranged with stake week contacts, and forms seepage action of ground water passage。
(3) precipitation system:
The well room of vacuum tube well cooperatively forms precipitation system with water plug, air extractor and pipeline; wherein; well room is the cell for depositing the various device of vacuum tube well system and pipeline arranged on friction pile stake top, and protection wellhead sealing flange apparatus is in order to avoid the damaged generation causing gas leak phenomenon。Dewatering Technology of Vacuum Deep Well is it is crucial that sealing to be got well, facts have proved that vacuum is most widely suited at-0.04～-0.06MPa, direct connection water-ring vacuum pump selected by air extractor, pumping equipment is deep well submerged pump, lift is more than 15m, and the water yield of water pump is selected according to the displacement of subsoil water drawdown and calculating。
Deep well submerged pump is lifted by steel wire, correspondingly has the pore that draws water, water pump cable aperture and suspending pump threaded hole of steel at upper flange, and immersible pump connects with ground power supply through cable。Being further opened with connecing the aspirating hole of vacuum pump on upper flange, all of hole is by by the rope made of hemp or bitumen treatment, ensureing strict sealing after circuit or pipeline。
As shown in Figure 6, wherein, 61 marks are potential slide surface to the friction pile 60 of the present invention arrangement on bank, and 62 marks are bank slope, and 63 marks are water level saturation。
The invention have the benefit that and vacuum tube well is set by leaving mesopore in the middle of antiskid pile body, under the premise of not reduction pile strength, decrease the concrete consumption of friction pile, the cast-in-place pile body of manually digging hole, construct simply easily operated, be the engineering measure on a kind of effective slope controlling landslide；The vacuum tube well adopted carries out precipitation and can discharge subsoil water efficiently, make up employing collector drain, vertical drilling to draw water the deficiency that dewatering effect is undesirable, practical operation is more difficult, the mountain area slope and land slide problem administering side reservoir slope, precipitation more is had good effect。The precipitation system Assembling utilizing vacuum tube well makes, and the water source of extraction may be used for field irrigation or enters in reservoir, greatly reduces water resource waste。
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope of present disclosure; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention。Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims。
Claims (8)
1. the friction pile being easy to vacuum-dewatering, it is characterised in that including:
Antiskid pile body and vacuum tube well；
In described friction pile body, described vacuum tube well is set；
Described vacuum tube well is arranged on the middle part of described antiskid pile body, from top to bottom through described antiskid pile body；
Described vacuum tube well top is provided with draw water pore and aspirating hole；
Described vacuum tube well adopts steel thimble, and described steel thimble top arranges sealing wellhead, is drainage section bottom described steel thimble；Described drainage section is: arrange multiple through hole on the body of one section, the bottom of described steel thimble, described each through hole connects a plastic tube respectively, it is external that described plastic tube passes described friction pile, can contact with the external soil layer of described friction pile, and the tube head of described plastic tube is provided with filter screen。
2. it is easy to the friction pile of vacuum-dewatering as claimed in claim 1, it is characterised in that described sealing wellhead is made up of the seal sleeve being sleeved on described steel thimble top and the flange being arranged on described seal sleeve；
Described draw water pore and described aspirating hole is arranged on described flange。
3. it is easy to the friction pile of vacuum-dewatering as claimed in claim 1, it is characterised in that the external diameter of described plastic tube is 10mm；
The filter screen that the tube head of described plastic tube is arranged is one layer of 80 mesh filter screen。
4. it is easy to the friction pile of vacuum-dewatering as claimed in claim 1, it is characterized in that, described antiskid pile body is square, the steel reinforcement cage fill concrete being sleeved on outside described vacuum tube well the pile body formed, the drainage section being arranged on described pile body bottom and be arranged on the expansion pile head of described drainage section bottom and constitute；
The position of described drainage section is corresponding with the position of the drainage section of described vacuum tube well。
5. it is easy to the friction pile of vacuum-dewatering as claimed in claim 3, it is characterised in that the drainage section of described antiskid pile body is coated with coarse sands layer。
6. the friction pile being easy to vacuum-dewatering as described in any one of claim 1 to 5, also includes: vacuum extractor and water plug；Wherein,
The exhaust tube of described vacuum extractor connects with in described vacuum tube well；
Described water plug is arranged in described vacuum tube well, and the drinking-water pipe of described water plug extend out to outside described vacuum tube well。
7. being easy to the friction pile of vacuum-dewatering as claimed in claim 6, described vacuum extractor adopts direct connection water-ring vacuum pump。
8. being easy to the friction pile of vacuum-dewatering as claimed in claim 7, described water plug adopts deep well submerged pump, is arranged on bottom described vacuum tube well。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310741227.7A CN103669333B (en) | 2013-12-27 | 2013-12-27 | It is easy to the friction pile of vacuum-dewatering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310741227.7A CN103669333B (en) | 2013-12-27 | 2013-12-27 | It is easy to the friction pile of vacuum-dewatering |
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| Publication Number | Publication Date |
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| CN103669333A CN103669333A (en) | 2014-03-26 |
| CN103669333B true CN103669333B (en) | 2016-06-22 |
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| CN201310741227.7A Expired - Fee Related CN103669333B (en) | 2013-12-27 | 2013-12-27 | It is easy to the friction pile of vacuum-dewatering |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105178289B (en) * | 2015-10-10 | 2017-10-31 | 江西建工第二建筑有限责任公司 | Precast dewatering pile tube and its application method in building foundation pit |
| CN109440775B (en) * | 2018-12-27 | 2020-11-24 | 云南省建设投资控股集团有限公司 | Sinking type foundation pit dewatering and drainage system, construction method and use method |
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2013
- 2013-12-27 CN CN201310741227.7A patent/CN103669333B/en not_active Expired - Fee Related
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