CN203846487U - Triangular-plum-blossom-shaped high-strength bored pile - Google Patents

Abstract

The utility model relates to a triangular-plum-blossom-shaped high-strength bored pile which is high in perpendicularity and inclination-resistant capacity, and has the full-load bearing capacity. The triangular-plum-blossom-shaped high-strength bored pile comprises a concrete bored pile body, the two end faces and the main body of the concrete bored pile body are respectively formed by three plum-blossom-petal-shaped parts in a connected mode, and one or more concrete cement pile main bodies are located in the triangular-plum-blossom-shaped cement soil stirring high-strength bearing pile body. The triangular-plum-blossom-shaped high-strength bored pile has the advantages that due to the facts that a pile foundation of the triangularly distributed plum-blossom-shaped cement bored pile body is large in bearing area, and bearing supporting points are triangularly distributed, the stability of the pile foundation is high; when the pile body composed of the triangular-plum-blossom-petal-shaped parts is located on a soft soil foundation, the three plum-blossom-petal-shaped pile main bodies with equal included angles act on the wall of the soft soil foundation like three protruding ejection columns, and it is ensured that the cement soil pile does not incline on the soft foundation and is vertically erected; one or more concrete cement pile main bodies are located in the triangular-plum-blossom-shaped cement soil stirring high-strength bearing pile body, and thus compactness of soil on the wall of the bored pile is improved.

Description

Triangular Flos Mume shape high strength drilled pile

Technical field

The utility model relate to good, the anti-tilt capability of a kind of verticality good, there is the Triangular Flos Mume shape high strength drilled pile of supporting capacity at full capacity, belong to cement drilled pile and manufacture field.

Background technology

CN1632233 A, title " the one-tenth pile operation method of bidirectional stirring pile ", a: leveling place; B: bidirectional stirring pile machine location: crane suspention mixer is to referring to fixed pile centering; C: stir: start bidirectional stirring pile machine, make bidirectional stirring pile driver drilling rod along leading truck to incision soil, open and send stock pump, to soil body water-spray type slurry, the blade of the forward and reverse rotation of difference Stirring cement-soil simultaneously on bidirectional stirring pile driver drilling rod; D: bidirectional stirring pile driver drilling rod continues to sink and stirring concrete earth, until projected depth; E: stir when lifting, on bidirectional stirring pile driver drilling rod, the blade of forward and reverse rotation continues stirring concrete earth; F: promote, be stirred to the above 50cm of earth's surface or design elevation, complete the construction of two-way stirring concrete drill hole stake.Its weak point: the one, the stake of background technology moulding is still single-column cement earth pile, single-column cement earth pile in soft foundation because pile foundation area is little, stake surrounding soil property rare soft, be vertically not enough to support single-column cement earth pile by support force and keep vertically, thereby very easily cause the single-column cement earth pile run-off the straight of institute's moulding and scrap; The 2nd, because cement paste in single-column cement earth pile and native stirring are for stirring in the same way, cannot make cannot reach mixing between cement paste and soil evenly, thereby certainly will cause the single-column strength of the cement-soil piles of institute's moulding low.

Utility model content

Purpose of design: avoid the weak point in background technology, design good, the anti-tilt capability of a kind of verticality good, there is the Triangular Flos Mume shape high strength drilled pile of supporting capacity at full capacity.

Design scheme: in order to realize above-mentioned purpose of design.1, the both ends of the surface of concrete drill hole stake and pile body, by the connected design forming of three plum blossom petals, are one of technical characterictics of the present utility model.The object of design is like this: because the pile foundation (stake end face) of the application's concrete drill hole stake is three overall structures that plum blossom petal forms that Triangular Flos Mume shape, pile body are equated mutually by angle, not only large, the triangular in shape stable support of the supporting surface of pile foundation, and pile body in weak soil is that the triangle legs of the tripod supports mutually due to what form, thereby effectively solve the defect that single-column cement earth pile very easily tilts.2, three axle rod bits are by the control of controller, make the design of rotating with mutually opposite direction between three axle drilling rods, are two of technical characterictics of the present utility model.The object of design is like this: the object of design is like this: due to the distribution triangular in shape of three axle drilling rods, and overlapped between the boring aperture radius between three axle drilling rods of Triangle-Profile, form the triangle quincuncial pile hole that three lobes are interconnected, the agitation pile of the triangle quincuncial pile hole formed thereby that this three lobe is interconnected, between three lobe pile bodies in its triangle plum blossom pile foundation, shape becomes the support at Coarse angle, improve the stability of pile foundation, and three lobe triangle plum blossom pile bodies have greatly increased the contact area between pile body and soil layer, not only improve the supporting capacity of stake, and strengthen the stability of pile body.3, having between multi-turn lug boss on three plum blossom concrete drill hole stake pile bodies is the design that spacing distributes, and is three of technical characterictic of the present utility model.The object of design is like this: the spacing at three plum blossom concrete drill hole stake pile bodies is provided with hoop projection, both just as the reinforcing rib of pile body, again just as a circle brace table, not only increase the friction factor between pile body and ground, effectively carry the bearing capacity of establishing pile body, and make the bearing strength of stake obtain effectively improving.4, the concrete cement stake spiral that one or more pile body is helicoidal structure is pressed into the design in triangle plum blossom Soil-cement high strength carrying pile body, is four of technical characterictic of the present invention.The object of design is like this: because the last radicle of concrete cement stake of helicoidal structure is equipped with point, this pile top is along with logical enough the piercing in concrete of rotation of stake, concrete is pushed to weak soil, not only strengthen concrete compactness, and concrete extruding forces the soil property compactness of concrete drill hole pile lining to increase, the bearing capacity that has greatly strengthened weak soil to drilled pile, and then increased the bearing capacity of drilled pile.

Technical scheme: a kind of Triangular Flos Mume shape high strength drilled pile, comprise concrete drill hole stake, the both ends of the surface of described concrete drill hole stake and pile body are connected and are formed by three plum blossom petals, and the concrete cement stake that one or more pile body is helicoidal structure is positioned at triangle plum blossom Soil-cement high strength carrying pile body.

The utility model compared with background technology, the one, the blossom type cement drilled pile of angular distribution is because the loaded area of pile foundation is large, bearing support is put distribution triangular in shape, thereby the good stability of pile foundation; The 2nd, the pile body forming when triangle plum blossom petal is during in soft foundation, and three plum blossom petal pile bodies that its angle equates act on soft foundation wall just as three posts projection fore-sets, have guaranteed that cement earth pile does not tilt, stands vertically in soft foundation; The 3rd, one or more concrete cement stake is positioned to triangle plum blossom Soil-cement high strength carrying pile body, the compactness of pile lining soil property of not only making to hole increases, and greatly strengthened the bearing capacity of soil property to drilled pile, and then increase the bearing capacity of drilled pile.

Brief description of the drawings

Fig. 1 is the perspective view of Triangular Flos Mume shape high strength drilled pile.

Fig. 2 is the perspective view with the Triangular Flos Mume shape high strength drilled pile of annular relief.

Fig. 3 is the plan structure schematic diagram of Triangular Flos Mume shape high strength drilled pile the first embodiment.

Fig. 4 is the plan structure schematic diagram of Triangular Flos Mume shape high strength drilled pile the second embodiment.

Detailed description of the invention

Embodiment 1: with reference to accompanying drawing 1.A kind of Triangular Flos Mume shape high strength drilled pile, comprise concrete drill hole stake 1, the both ends of the surface of described concrete drill hole stake 1 and pile body 2 are connected and are formed by three plum blossom petals, and the concrete cement stake 5 that one or more pile body is helicoidal structure is positioned at triangle plum blossom Soil-cement high strength carrying pile body.This concrete tubular pile 3 can be both the real core stake of prefabricated cement, also can prefabricated hollow core concrete stake, and can also be with replacements such as the high-strength plastic stock column of various shapes, steel column, steel pipe, section bars.Angle between three plum blossom petals equates or is unequal.Reinforcing cage 3 in concrete drill hole stake 1 is triangular in shape quincunx.

Embodiment 2: with reference to accompanying drawing 2-4.On the basis of above-described embodiment 1, three plum blossom concrete drill holes stake, 1 pile body 2 has multi-turn lug boss 4.Having on three plum blossom concrete drill holes stake, 1 pile body 2 is spacing between multi-turn lug boss 4 and distributes.

Embodiment 3: with reference to accompanying drawing 2-4.A kind of triangle plum blossom Soil-cement high strength bearing peg, comprise cement mixing method 1, the both ends of the surface of described cement mixing method 1 and pile body 2 are connected and are formed by three plum blossom petals, and many concrete cement stakes (pile tube) 5 are positioned at triangle plum blossom Soil-cement high strength carrying pile body.These many concrete tubular piles 5 can be both the real core stakes of prefabricated cement, also can prefabricated hollow core concrete stakes, and can also be with replacements such as the high-strength plastic stock column of various shapes, steel column, steel pipe, section bars.Angle between three plum blossom petals equates or is unequal.

The manufacturing process of its Triangular Flos Mume shape high strength drilled pile, (one) preparatory stage: (1) stake position setting-out: survey crew is squeezed into severely-weathered layer as guide pile using Triangular Flos Mume shape steel pipe; (2) by fixing to the steel cofferdam direction peg of lifting i iron welding and guide pile layering connection, guarantee that guide housing position is accurate; (3) inserted to play Triangular Flos Mume shape steel casing, casing submergence depth is through covering layer; The key of boring success or failure is to prevent hole wall collapse.In the time that boring is darker, the hole wall soil below groundwater table can cave in, even occur quicksand phenomenon under hydrostatic pressure in hole.If can keep the head higher than groundwater table in boring, increase hydrostatic pressure in hole, can be hole wall, prevent the hole that collapses.Casing, except playing this effect, has isolation surface water, protection ground, aperture, spud pile hole site and drill bit guide effect etc. with fashion.Make the material of casing and have three kinds, wood, steel, steel concrete.Casing requires sturdy and durable, water-tight, its internal diameter should be larger than bore diameter (the approximately large 20cm of rotary drilling, diving bores, impacts or the approximately large 40cm of cone is grabbed in punching), approximately 2 ~ 3m of every joint length.General Common Steels casing.(4) inserted to play steel sheet-pile cofferdam, until through covering layer; (5) drilling slurry is made up of water, clay (swell soil) and additive, there is floating outstanding boring mud, cooling drill bit, lubricated drilling tool, increase hydrostatic pressure, and form mud skin at hole wall, cut off the inside and outside seepage flow in hole, the effect in hole prevents from collapsing, the mud of the drilling slurry of modulation and process circularly purifying, should determine slip consistency according to boring method and strata condition, and slip consistency should be looked formation variation or the motor-driven grasp of operation requirements, mud is too rare, and deslagging ability is little, retaining wall weak effect; Mud is too thick can weaken drill bit impact function, reduces rate of penetration.(2) in the boring stage: (1) installs three axle rigs, make three axle drilling rod center superpositions, and its horizontal movement and bank error are pressed code requirement adjustment; (2), during with three axle the impact drillings, when the concrete setting that should pour on adjacent holes position has also reached some strength, just can spud in; (3) three axle boring procedures adopt normal circulation slewing drilling machine to enter construction technology, at clay layer, suitably throw less earth, by creeping into pulping voluntarily, strengthen concentration of hydraulic mixture Gu Bi at sandy soils, and three axle rate of penetrations adapt with mud discharge rate all the time; (4) in Triangular Flos Mume hole, remain the hydrostatic pressure of 0.2kg/cm2, in triangle casing, water level is all the time higher than reservoir level, while meeting scall, suitably increase specific gravity of mud and denseness, alleviate as far as possible and rush the impact of liquid on hole wall, reduce rotating speed and the pressure of the drill to meet quality control on construction requirement simultaneously; (5) drilling process is left and taken slag specimen at any time, and every meter is no less than 1 group, and within the scope of design elevation 1.0～1.5m, every 30cm stays 1 group, and every pile slag specimen is no less than 3 groups; (3) the clear hole stage: the degree of depth, diameter, position and the hole shape of boring is directly connected to pile quality and the right and wrong song of pile body., in boring procedure, observation is supervised closely, reach after the designing requirement degree of depth in boring, reply hole depth hole, Kong Wei, hole shape, aperture etc. check for this reason.Check while meeting designing requirement completely in whole hole, should carry out immediately cleaning at the bottom of hole, avoid every time long so that mud sediment, cause borehole collapse.In the time that hole wall easily caves in, require sediment thickness before pouring underwater concrete to be not more than 30cm for friction pile; In the time that hole wall is difficult for caving in, be not more than 20cm.For stanchion, require at jetting or penetrate before wind, sediment thickness is not more than 5cm.Clear hole method is the rig difference that uses and flexible Application.Conventionally can adopt direct circulation rotary rig, anti-circulation rotating machine vacuum-cleaner dredge and take out the clear holes such as slag cylinder.Wherein, with the clear hole of suction dredge, equipment needed thereby is few, easy to operate, and clear hole is also more thorough, but should use cautiously in unstable soil layer.Its principle is exactly to be blown in suction dredge pipeline body refuse is blown out with the pressure-air that compressor produces.Therefore: after (1) boring finishes, three axle drill bits are carried to the 0.2-0.3m place at the bottom of hole, made it to dally, then by the boring mud sucking-off remaining at the bottom of hole; (3) after Triangular Flos Mume shape reinforcing cage sinks to fixing, again recheck hole depth and sediment thickness, if sediment exceeds standard, with airduct attached in conduit clear hole again, until all meet designing requirement and technological standards; (4) pouring underwater concrete: after clear complete hole, prefabricated Triangular Flos Mume shape reinforcing cage is vertically hung onto in hole, behind location, to be fixed, then use tremie concrete, due to intrinsic motor in head vibrator on conduit lower end wall, therefore concrete edge perfusion in the time of perfusion, limit vibration, makes concrete continuous in vibration, be filled into top, Triangular Flos Mume shape hole, when perfusion, do not interrupt, otherwise be prone to pile breaking phenomenon; (5) piling: the concrete cement stake that is helicoidal structure by one or more pile body 5 rotations are pressed in triangle plum blossom Soil-cement high strength carrying pile body and obtain Triangular Flos Mume shape high strength drilled pile.

It is to be understood that: although above-described embodiment is to the mentality of designing of the present utility model detailed text description of contrasting; but these text descriptions; just the simple text of the utility model mentality of designing is described; instead of restriction to the utility model mentality of designing; any combination, increase or amendment that does not exceed the utility model mentality of designing, all falls in protection domain of the present utility model.

Claims (5)

1. a Triangular Flos Mume shape high strength drilled pile, comprise concrete drill hole stake (1), it is characterized in that: the both ends of the surface of described concrete drill hole stake (1) and pile body (2) are connected and are formed by three plum blossom petals, the concrete cement stake (5) that one or more pile body is helicoidal structure is positioned at triangle plum blossom Soil-cement high strength carrying pile body.

2. Triangular Flos Mume shape high strength drilled pile according to claim 1, is characterized in that: the angle between three plum blossom petals equates or be unequal.

3. Triangular Flos Mume shape high strength drilled pile according to claim 1, is characterized in that: three plum blossom concrete drill holes stake (1) pile body (2) has multi-turn lug boss (4).

4. Triangular Flos Mume shape high strength drilled pile according to claim 3, is characterized in that: be positioned at having on three plum blossom concrete drill holes stake (1) pile body (2) and between multi-turn lug boss (4), be spacing and distribute.

5. Triangular Flos Mume shape high strength drilled pile according to claim 1, is characterized in that: the reinforcing cage (3) in concrete drill hole stake (1) is triangular in shape quincunx.