CN103669333A - Slide-resistant pile facilitating vacuum rainfall - Google Patents

Slide-resistant pile facilitating vacuum rainfall Download PDF

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Publication number
CN103669333A
CN103669333A CN201310741227.7A CN201310741227A CN103669333A CN 103669333 A CN103669333 A CN 103669333A CN 201310741227 A CN201310741227 A CN 201310741227A CN 103669333 A CN103669333 A CN 103669333A
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China
Prior art keywords
vacuum
vacuum tube
tube well
pile
slide
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Application number
CN201310741227.7A
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Chinese (zh)
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CN103669333B (en
Inventor
杨宇友
宫大辉
王建强
邓启江
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China University of Geosciences
China University of Geosciences Beijing
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China University of Geosciences Beijing
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Priority to CN201310741227.7A priority Critical patent/CN103669333B/en
Publication of CN103669333A publication Critical patent/CN103669333A/en
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Publication of CN103669333B publication Critical patent/CN103669333B/en
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Abstract

The invention discloses a slide-resistant pile facilitating vacuum rainfall, and belongs to the field of side slope governing facilities. The slide-resistant pile comprises a slide-resistant pile body and a vacuum tube well, wherein the vacuum tube well is arranged in the slide-resistant pile body, the vacuum tube well is arranged in the middle of the slide-resistant pile body and penetrates through the slide-resistant pile body from top to bottom, a water pumping pipe hole and an air extracting hole are formed in the top end of the vacuum tube well; a steel sleeve is adopted for the vacuum tube well, a sealing well opening is formed in the top end of the steel sleeve, and the bottom of the steel sleeve is a water filtering segment. The vacuum tube well is arranged in the middle of the slide-resistant pile body of the slide-resistant pile, on the premise that the strength of the pile body is not reduced, the using amount of slide-resistant concrete is reduced, a hole can be manually dug to cast the slide-resistant pile body in place, and the slide-resistant pile is easy to construct and operate and is an effective engineering measure for effectively governing side slope landslip. Besides, due to the fact that the vacuum tube well is arranged, vacuum deep well rainwater and underground water can be discharged, and the problems that an existing slide-resistant pile is not ideal in drainage effect and not convenient to operate are solved.

Description

Be convenient to the antislide pile of vacuum-dewatering
Technical field
The present invention relates to slope treatment facility field, particularly relate to the antislide pile of being convenient to vacuum-dewatering using in the landslide control engineering of a kind of reservoir area.
Background technology
Antislide pile is effective engineering measure of administering landslide, and it is, by pile peripheral earth, the embedding of stake is constructed for stablizing the soil body, and antislide pile is widely used in slope treatment.Drainage works is also an engineering measure on control landslide, is divided into top drainage and underdrainage.Top drainage engineering is simple and easy to construction, and construction costs is low, and nearly all Harnessing of Landslide engineering all comprises top drainage measure.Groundwater level Upon Slope Stability has a significant impact, and water level is higher, and Side Slope Safety Coefficient is lower, the safety of serious threat side slope.Rainy mountain area and the various large reservoir side reservoir slope in south particularly, the seepage effect of underground water has aggravated the potential Landslide hazard of side slope.Mole drainage can reduce pore water pressure greatly, thereby increase effective normal stress, improves skid resistance, and consolidation effect is splendid, but the large-scale draining in deep is more complex compared with top drainage.The antislide pile adopting in engineering is generally reinforced concrete structure, mainly plays anchoring, shearing resistance effect, although improved slope body stability against sliding, to getting rid of water in the body of slope without any effect.Compact arranged antislide pile has also produced the effect of cut-off wall to a certain extent, has stopped the seepage channel of water in the body of slope.
At present, a kind of novel driving into type antislide pile by the design such as the Peng Hui of SanXia University, is provided with mesopore in pile body, mesopore be distributed in the drain hole UNICOM on pile body.When pile body is squeezed into slope soil, in soil, press water can enter mesopore by drain hole and discharges, and both can discharge press water in the soil body, plays again anchoring or barricade effect.
Though this antislide pile of above-mentioned prior art has drain function, can only discharge press water in soil, drainage effect is not obvious.Owing to being the driving into type antislide pile of design, pile body length is shorter, and intensity is lower, 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 antislide pile of being convenient to vacuum-dewatering, large-scale reservoir area reservoir level fast, lifting may cause in reservoir level and side slope underground water pressure reduction larger repeatedly, easily causing landslide destroys, the present invention intends adopting vacuum-dewatering technology, in the time of reducing reservoir level fast-descending side slope outer with side slope in the discrepancy in elevation of underground water, thereby the slope instability problem that while having solved fast rainfall, the inside and outside differential water pressures of side slope body is brought out greatly.
The invention provides a kind of antislide pile of being convenient to vacuum-dewatering, comprising:
Antiskid pile body and vacuum tube well;
In described antiskid pile body, described vacuum tube well is set;
Described vacuum tube well is arranged on the middle part of described antiskid pile body, connects from top to bottom described antiskid pile body;
Described vacuum tube well top is provided with draw water pore and aspirating hole;
Described vacuum tube well adopts steel sleeve, and described steel sleeve top arranges sealing wellhead, and described steel sleeve bottom is drainage section.
Beneficial effect of the present invention is: the centre at antiskid pile body arranges vacuum tube well, under the prerequisite of not reduction pile strength, reduced the concrete consumption of antislide pile, this antiskid pile body can the cast-in-place pile body of manually digging hole, the simple easy operating of constructing is a kind of engineering measure of effective improvement slope and land slide.And due to vacuum tube well being set, can realizing vacuum deep well precipitation and discharge underground water, solve existing antislide pile drainage effect undesirable, the problem of inconvenient operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use 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, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
The structural representation of the antislide 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;
Fig. 4 is for arranging schematic diagram in the flange aperture of the wellhead sealing that the embodiment of the present invention provides;
Fig. 5 be B-B in Fig. 1 to the sectional view of drainage section of antiskid pile body;
The antislide pile that Fig. 6 provides for the embodiment of the present invention is arranged in the schematic diagram of bank slope.
The specific embodiment
Below the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on embodiments of the invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
Fig. 1,3 is depicted as the embodiment of the present invention a kind of antislide pile of being convenient to vacuum-dewatering is provided, and is the antislide pile facility that facilitates draining in a kind of slope treatment, and this antislide pile comprises: antiskid pile body 1 and vacuum tube well 2;
Wherein, the interior vacuum tube well 2 that arranges of antiskid pile body 1;
Vacuum tube well 2 is arranged on the middle part of antiskid pile body 1, connects from top to bottom antiskid pile body 1;
Vacuum tube well 2 tops are provided with draw water pore 14 and aspirating hole 15;
Vacuum tube well 2 adopts steel sleeve, and steel sleeve top arranges sealing wellhead 21, and steel sleeve bottom is drainage section 22.The well chamber that sealing wellhead 21 makes the interior formation closed structure of vacuum tube well 2 is set, is convenient to realize vacuum-dewatering.
As shown in Figure 2, the structure of the antiskid pile body 1 of above-mentioned antislide pile is square, and the pile body 10 being formed by the filling concrete of reinforcing cage 11 that is sleeved on vacuum tube well outside, the expansion pile head 13 that is arranged on the drainage section 12 of pile body 10 bottoms and is arranged on drainage section bottom form; 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 antislide pile, the structure of the sealing wellhead 21 of vacuum tube well 2, consists of with the flange 212 that is arranged on seal sleeve the seal sleeve 211 that is sleeved on steel sleeve top;
Draw water pore 14 and aspirating hole 15 is arranged on flange 212.Concrete, the pore 14 that draws water can consist of three through holes, a through hole for passing through for drinking-water pipe, another two is that water pump cable aperture 16 and lifting iron wire hole 17(are shown in Fig. 4).
As shown in Figure 5, in above-mentioned antislide pile, the drainage section 22 of vacuum tube well 2 is: on one section of the bottom body of steel sleeve, a plurality of through holes are set, each through hole connects respectively a plastic pipe 221 and connects, plastic pipe 221 passes outside antiskid pile body 1, can contact with the external soil layer of antislide pile, the tube head of plastic pipe 221 is provided with filter screen.Wherein, plastic pipe 221 employing external diameters are 10mmPVC plastic straw; The filter screen of the tube head setting of plastic pipe 221 is one deck 80 mesh filter screens.Can prevent that soil from entering plastic pipe and stopping up body.
In above-mentioned antislide pile, the drainage section 12 of antiskid pile body is coated with coarse sands layer, is convenient to permeable.
As shown in Figure 1, above-mentioned antislide pile also comprises: vacuum extractor 3 and water plug 4; Wherein, the exhaust tube of vacuum extractor 3 is communicated with vacuum tube well 2 is interior; 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 vacuum tube well bottom.
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 antislide pile, it is a kind of antislide pile of embedded vacuum tube well, this antislide pile is a kind of cast-in-place concrete structure that can on-the-spot manually digging hole, comprise antiskid pile body and be embedded in the vacuum tube well in sliding pile body, antiskid pile body comprises pile body and stake bottom expansion pile head, in pile body, be provided with vacuum tube well, vacuum tube well is made by steel sleeve, steel sleeve top is sealing wellhead, bottom is drainage section, sealing wellhead consists of the seal sleeve of seamless steel pipe and flange (as the upper flange of seal cover and be arranged on the lower flange on seal sleeve), adopt the mode of " flange+seal sleeve " to seal.Drainage section is a plurality of little through holes of body circumference brill at steel sleeve, on each through hole, all connect plastic pipe (plastic pipe adopts the PVC plastic straw of external diameter 10mm), plastic pipe contacts with pile soil horizon through antiskid pile body, for preventing stopping up into soil, and tube head wrapping one deck 80 mesh filter screens of plastic pipe.Further, vacuum extractor and water plug can also be set, coordinate with vacuum tube well, form vacuum precipitation system.
This antislide 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, having realized on the basis gliding at opposing slope soil utilizes Dewatering Technology of Vacuum Deep Well to reduce the effect of slope underground water position, and can solve reduction aquitard that other precipitation methods cannot accomplish and the problem of interface, aquifer residual water, greatly reduce side slope soil layer pore water pressure, improve its safety factor of slope.
Below in conjunction with accompanying drawing, respectively the each several part of above-mentioned antislide pile is described.
(1) antislide pile body structure:
The outside coarse sand surrounding of pile body, stake bottom expansion pile head and drainage section that antiskid pile body is provided with vacuum tube well by inside forms, and pile body sectional dimension is 1.6m * 1.2m.Antislide pile body length is generally by touching basement rock at the bottom of stake or being as the criterion compared with hardpan, need be through the potential slide surface of side slope, after manually digging hole, assembling reinforcement cage, centre fix a radius be the steel pipe that equates with hole depth of 200mm, length as precipitation pipe well, then limit is carried dado template limit fluid concrete and is made antislide pile.
(11) stake end enlarged footing:
Hole depth is dug to design hole depth, is generally stable basement rock, and expansion pile head at the bottom of cleaning eye, uses compared with high-grade concrete back cover 15~20cm, and mesopore pipe well takes a seat and drops on back cover.The effect of expansion pile head is to strengthen the anchored force of antislide pile to the soil body.
(12) the outside coarse sand that surrounds of drainage section stake:
The bottom of vacuum tube well is drainage section, by PVC tubule, through antislide pile, is contacted form drainage passage with surrounding soil, for strengthening drainage area, when cast pile crown and stake end section, in formwork outside, is pressed into coarse sand, and template limit fluid concrete is carried on limit.At the bottom of finally making, the section surrounding bag coarse sand that makes a circle, can easily flow in the negative pressuren zone of vacuum tube well underground water.
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 vacuum deep well underground water that precipitation system falls all derive from slide surface with upward slope body.By the potential slide surface form of plasticity limit analysis upper bound method Analysis deterrmination bank slope.
(13) pile body:
Pile body design is undertaken by < < anti-slide pile design standard > > requirement, make it to there is certain flexural strength, meet the effect that improves the sliding mass coefficient of stability, in the design, get pile body sectional dimension 1600mm * 1200mm.
(2) vacuum tube well:
Vacuum tube well is boring drainage section, through PVC plastic straw, air extractor and the water plug of pile body bottom, is formed by upper wellbore section sealing wellhead, well chamber, lower wellbore section, itself and the difference of tube well dewatering device are exactly to increase sealing and vacuum extractor, by vacuum pump, bleed and form negative pressure in the pipe well of sealing, Accelerating Removal underground water, negative pressure of vacuum can also produce active force, drainage underground water to underground water in the soil layer of poor permeability simultaneously.
(21) well head design:
Vacuum tube well well head will strictly seal: well head adopts the mode of " flange+seal sleeve " to seal, at cast antislide pile concrete during to 1 meter suitable for reading of well casing, 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, be to weld with steel sleeve 2 connected modes, and then seal with thinner cement grout.Upper flange 212 is 15mm steel plate, offers water pump cable aperture 16 above, the pore 14 that draws water, suspending pump iron wire hole 17 and aspirating hole 15.At antislide pile pile crown, make well chamber, for laying air extractor, water plug and pipeline.
(22) well bore drainage section:
As the steel pipe lower boreholes of pipe well, make the drainage section part of vacuum tube well, drainage segment length is well bore 25%~50%.Along steel pipe surrounding, hole, bore diameter is PVC plastic straw external diameter 10mm, pvc pipe one end is inserted in pipe well, the other end is wrapped up with 80 mesh filter screens, preventing that soil particle from entering blocks current in pipe, pvc pipe extends to the hole wall soil layer in a dig hole, and the coarse sand of arranging with stake week contacts, and forms seepage action of ground water passage.
(3) precipitation system:
The well chamber of vacuum tube well coordinates formation precipitation system with water plug, air extractor and pipeline; wherein; well chamber be on antislide pile stake top, arrange for depositing the cell of the various devices of vacuum tube well system and pipeline, protection wellhead sealing flange apparatus is in order to avoid the damaged generation that causes gas leak phenomenon.Dewatering Technology of Vacuum Deep Well most critical be that sealing will be got well, facts have proved that vacuum is the most suitable at-0.04~-0.06MPa, air extractor is selected direct connection water-ring vacuum pump, pumping equipment is deep well submerged pump, lift is greater than 15m, and the water yield of water pump is selected according to the displacement of underground water drawdown and calculating.
Deep well submerged pump lifts by steel wire, at upper flange, correspondingly has the pore that draws water, water pump cable aperture and suspending pump threaded hole of steel, and submersible pump joins through cable and ground power supply.On upper flange, also offer the aspirating hole that connects vacuum pump, all holes all will, by the rope made of hemp or bitumen treatment, ensure strict sealing after by circuit or pipeline.
Antislide pile 60 of the present invention at the arrangement on bank as shown in Figure 6, wherein, 61 signs be potential slide surface, 62 signs be bank slope, 63 what identify is water level phreatic line.
Beneficial effect of the present invention is: by leave mesopore in the middle of antiskid pile body, vacuum tube well is set, under the prerequisite of not reduction pile strength, reduced the concrete consumption of antislide pile, the cast-in-place pile body of manually digging hole, the simple easy operating of constructing is a kind of engineering measure of effective improvement slope and land slide; The vacuum tube well adopting carries out precipitation and can discharge efficiently underground water, make up and adopt collector drain, the vertical drilling deficiency that dewatering effect is undesirable, practical operation is more difficult of drawing water, to administering side reservoir slope, the more mountain area slope and land slide problem of precipitation has good effect.Utilize the precipitation system Assembling of vacuum tube well to make, the water source of extraction can or enter in reservoir for field irrigation, greatly reduces water resource waste.
The above; be only the present invention's specific embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in 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 (9)

1. an antislide pile of being convenient to vacuum-dewatering, is characterized in that, comprising:
Antiskid pile body and vacuum tube well;
In described antiskid pile body, described vacuum tube well is set;
Described vacuum tube well is arranged on the middle part of described antiskid pile body, connects from top to bottom described antiskid pile body;
Described vacuum tube well top is provided with draw water pore and aspirating hole;
Described vacuum tube well adopts steel sleeve, and described steel sleeve top arranges sealing wellhead, and described steel sleeve bottom is drainage section.
2. the antislide pile of being convenient to vacuum-dewatering as claimed in claim 1, is characterized in that, described sealing wellhead consists of with the flange that is arranged on described seal sleeve the seal sleeve that is sleeved on described steel sleeve top;
Described pore and the described aspirating hole of drawing water is arranged on described flange.
3. the antislide pile of being convenient to vacuum-dewatering as claimed in claim 1, it is characterized in that, described drainage section is: on one section of the bottom body of described steel sleeve, a plurality of through holes are set, described each through hole connects respectively a plastic pipe and connects, it is external that described plastic pipe passes described antislide pile, can contact with the external soil layer of described antislide pile, the tube head of described plastic pipe is provided with filter screen.
4. the antislide pile of being convenient to vacuum-dewatering as claimed in claim 3, is characterized in that, the external diameter of described plastic pipe is 10mm;
The filter screen of the tube head setting of described plastic pipe is one deck 80 mesh filter screens.
5. the antislide pile of being convenient to vacuum-dewatering as claimed in claim 1, it is characterized in that, described antiskid pile body is square, and the pile body being formed by the filling concrete of reinforcing cage that is sleeved on described vacuum tube well outside, the expansion pile head that is arranged on the drainage section of described pile body bottom and is arranged on described drainage section bottom form;
The position of described drainage section is corresponding with the position of the drainage section of described vacuum tube well.
6. the antislide pile of being convenient to vacuum-dewatering as described in claim 4 any one, is characterized in that, the drainage section of described antiskid pile body is coated with coarse sands layer.
7. the antislide pile of being convenient to vacuum-dewatering as described in claim 1 to 6 any one, also comprises: vacuum extractor and water plug; Wherein,
The exhaust tube of described vacuum extractor is communicated 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.
8. the antislide pile of being convenient to vacuum-dewatering as claimed in claim 7, described vacuum extractor adopts direct connection water-ring vacuum pump.
9. the antislide pile of being convenient to vacuum-dewatering as claimed in claim 8, described water plug adopts deep well submerged pump, is arranged on described vacuum tube well bottom.
CN201310741227.7A 2013-12-27 2013-12-27 It is easy to the friction pile of vacuum-dewatering Expired - Fee Related CN103669333B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105178289A (en) * 2015-10-10 2015-12-23 江西建工第二建筑有限责任公司 Prefabricated downcast pipe pile in building foundation pit and use method thereof
CN109440775A (en) * 2018-12-27 2019-03-08 云南省建设投资控股集团有限公司 A kind of sunk type foundation pit Yield rainfall relation system, construction method and application method

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105178289A (en) * 2015-10-10 2015-12-23 江西建工第二建筑有限责任公司 Prefabricated downcast pipe pile in building foundation pit and use method thereof
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CN109440775A (en) * 2018-12-27 2019-03-08 云南省建设投资控股集团有限公司 A kind of sunk type foundation pit Yield rainfall relation system, construction method and application method
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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