CN203463016U - Three-axle agitator drill suitable for piercing gravel layer soil - Google Patents
Three-axle agitator drill suitable for piercing gravel layer soil Download PDFInfo
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- CN203463016U CN203463016U CN201320517024.5U CN201320517024U CN203463016U CN 203463016 U CN203463016 U CN 203463016U CN 201320517024 U CN201320517024 U CN 201320517024U CN 203463016 U CN203463016 U CN 203463016U
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Abstract
A three-axle agitator drill suitable for piercing gravel layer soil comprises a drill rod, wherein a grouting steel pipe is built in the drill rod, a plug-in type connector which is used for connecting a pile driving frame of a three-axle agitator is arranged at the tail of the drill rod, a propelling head is arranged at the head of the drill rod, a drill knife row is arranged on the drill rod behind the propelling head, a drill neck guard flange is arranged on the drill rod behind the drill knife row, a blade type tapered propelling head which consists of three to five blades is used as the propelling head, a blade type drill knife row which consists of two to eight knife rows is used as the drill knife row, and a blade type drill neck guard flange which consists of two to eight flanges is used as the drill neck guard flange. The three-axle agitator drill belongs to the drill which can conquer hard soil layers, such as gravel layers and strong-weathered rock layers. The drill can achieve deep soil agitation and can form a columnar body guarding and water stopping structure. The drill is skillfully designed, has an ideal effect, is easy to realize, can pierce relatively hard strata, such as the gravel layers and the strong-weathered rock layers and can carry out grouting and uniform agitation.
Description
Technical field
The utility model relates to a kind of three axle mixer drill bits that are applied to build experimental project field, particularly a kind ofly can stir to underground deep soil body (the especially relatively hard soil layer such as gravel layer, strong-weathered rock soil layer) three axle mixer drill bits of consolidation process.
Background technology
Soil-cement wall technology is to utilize special multiple-rotor mixer to creep on the spot the cutting soil body, in drill bit end, cement grout is injected to the soil body simultaneously, after being fully uniformly mixed, form diaphragm wall body, then utilize this body of wall directly as gear soil and water-stopping structure.The main feature of Soil-cement wall technology is simple structure, and sealing performance is good, and the duration is short, and cost is low, and environment pollution is little, is particularly suitable for the deep foundation ditch experimental project in city.
The soft soil layers such as current Soil-cement wall technology is only applicable to banket, mucky soil, cohesive soil, silt, sandy soil, saturated loess; for relatively hard soil layers such as picture circle gravel soil layer, strong-weathered rock soil layers; because the existing structure that is arranged on the drill bit on multiple-rotor mixer exists limitation; so when running into the hard soil properties such as round gravel soil layer, strong-weathered rock soil layer (such as completely decomposed granite), have creep into the cutting soil body process very slowly, the shortcoming such as cement consumption additionally increases, drill bit well damage.That is to say, the ability that the existing drill bit being arranged on multiple-rotor mixer penetrates the stratum that geology is relatively hard is poor, so creep into the cutting soil body, has technological deficiency.
But, circle gravel soil layer, strong-weathered rock soil layer etc. belong to highly permeable layer soil body, highly permeable layer soil body is sought after again processing formation water-stop curtain, so how Soil-cement wall technology is applied on the relatively hard soil layer such as round gravel soil layer, strong-weathered rock soil layer, has become those skilled in the art's technical problem anxious to be resolved.
Utility model content
The purpose of this utility model is to provide a kind of three axle mixer drill bits that are applicable to penetrate gravel layer soil property, solve multiple-rotor mixer and on the relatively hard soil layer such as circle gravel soil layer, strong-weathered rock soil layer, creep into the technical problem of difficult cutting.
For achieving the above object, the utility model adopts following technical scheme: a kind of three axle mixer drill bits that are applicable to penetrate gravel layer soil property, comprise the drilling rod that is built-in with slip casting steel pipe, and the afterbody of drilling rod is provided with the interpolation type joint that is connected use with the pile driving frame of three axle mixers, it is characterized in that: the head of drilling rod is provided with the head that advances, the drilling rod at a rear of advancing is provided with drill bit blade row, and the drilling rod at drill bit blade row rear is provided with drill bit rib wing plate.
The described leaf formula taper that is comprised of three to five blades of head of the advancing head that advances, these three to five blades are radially uniformly distributed round the axial line of drilling rod, and the blade of blade is provided with one to three alloy brill tooth that advances.
The leaf formula drill bit blade row that described drill bit blade row is comprised of two to eight blade rows, blade row is 20 degree～25 degree to the inclination of drilling rod afterbody and angle of penetration, blade row becomes the angle of 63 degree～68 degree with the axial line of drilling rod, the blade of blade row is provided with two to five drill bit blade row alloys and bores tooth.
The leaf formula drill bit rib wing plate that described drill bit rib wing plate is comprised of two to eight wing plates, wing plate is 15 degree～20 degree to boring bar head inclination and angle of penetration, wing plate is relative vertical with the axial line of drilling rod.
The angle of penetration that described drill bit blade row alloy bores tooth can be 15 degree～30 degree;
The spacing that described drill bit blade row alloy bores between tooth can be 15 centimetres.
Described interpolation type joint can be the tool joint of interpolation type hexagonal or inner inserting type spiral joint.
Compared with prior art the utlity model has following characteristics and beneficial effect: the utility model is a kind of three axle mixer drill bits that can capture the hard soil layers such as round gravel soil layer, strong-weathered rock soil layer (such as completely decomposed granite), can reach soil body deep-layer stirring and form column watch box water-stopping structure.
The utility model design is ingenious, satisfactory for result, easy to implement, can penetrate the stratum that the geology such as round gravel soil layer, strong-weathered rock soil layer are relatively hard and carry out slip casting uniform stirring, reaches the effect of experimental project bracing of foundation pit sealing.
Leaf formula taper in the utility model advance head can effectively cut round gravel soil layer and strong-weathered rock soil layer, and incision soil body part is arranged to periphery, leaf formula drill bit blade row in the utility model can be effectively by the head that advances cut soil body uniform stirring and on return, on return the soil body and reach after the drill bit rib wing plate in the utility model, under the effect of drill bit rib wing plate, continue to stir, return on no longer.
Leaf formula bit wing in the utility model tilts discharged to drilling rod afterbody, and angle of penetration is 20 degree～25 degree, and become the angle of 63 degree～68 degree with the axial line of drilling rod, design is to creep into because be more conducive to shred soil body deep layer in this angular range like this, the upper anti-soil body, reduces the loss of creeping into resistance and can reduce to a certain extent drill bit.
Drill bit rib wing plate in the utility model tilts to boring bar head, and angle of penetration is 15 degree～20 degree, and relative vertical with the axial line of drilling rod, design is because the upper anti-soil body is controlled within the specific limits like this, be unlikely to anti-to facial contour pore-forming hole, ground on the soil body, increase cement consumption.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail.
Fig. 1 is schematic perspective view of the present utility model.
Fig. 2 is that master of the present utility model looks schematic diagram.
Reference numeral: advance alloy of 1-drilling rod, 2-interpolation type joint, 3-bores a tooth, 4-advance head, 5-drill bit blade row, 6-drill bit rib wing plate, 7-drill bit blade row alloy brill tooth.
The specific embodiment
Embodiment is referring to shown in Fig. 1, Fig. 2, this three axle mixer drill bits that are applicable to penetrate gravel layer soil property, comprise that the drilling rod 1(drilling rod that is built-in with slip casting steel pipe (soil body being carried out to slip casting by slip casting steel pipe) is cylinder, cylinder center is hollow, be used for installing Grouting Pipe pipe), and the afterbody of drilling rod 1 is provided with the interpolation type joint 2 that is connected use with the pile driving frame of three axle mixers, in the present embodiment, interpolation type joint 2 is the tool joint of interpolation type hexagonal.In other embodiments, interpolation type joint 2 can be also inner inserting type spiral joint.
The head of described drilling rod 1 is provided with and advances 4, and a drilling rod at 4 rears 1 that advances is provided with drill bit blade row 5, and the drilling rod 1 at drill bit blade row 5 rears is provided with drill bit rib wing plate 6.
In the present embodiment, described in a 4 leaf formula taper that formed by the three blades head that advances that advances, these three blades are radially uniformly distributed round the axial line of drilling rod, and the blade of blade is provided with two alloys that advance and bores teeth 3.In other embodiments, advance 4 quantity can be also two, four, five or multi-disc more.The described leaf formula taper head that advances can stir gravel layer soil property, and the alloy of advancing that the taper of leaf formula is advanced on head bores a tooth 3 and can effectively cut the hard soil body, creeps into hard soil layer.
In the present embodiment, the leaf formula drill bit blade row that described drill bit blade row 5 is comprised of three blade rows, blade row is 20 degree～25 degree to the inclination of drilling rod afterbody and angle of penetration, and blade row becomes the angle of 63 degree～68 degree with the axial line of drilling rod 1, and the blade of blade row is provided with three drill bit blade row alloys and bores teeth 7.In other embodiments, the quantity of blade row can be also the multi-discs such as two, four, five, six, seven or eight, can establish one or two drill bit blade row alloy and bore tooth 7 on the blade of blade row.Described leaf formula drill bit blade row can effectively will return on cutting soil and uniform stirring.
The angle of penetration a of leaf formula drill bit blade row be 22 while spending and the angle of the axial line of leaf formula drill bit blade row and drilling rod be 65 while spending, result of use is best.
In the present embodiment, the leaf formula drill bit rib wing plate that described drill bit rib wing plate 6 is comprised of two wing plates, wing plate is 15 degree～20 degree to boring bar head inclination and angle of penetration, wing plate is relative vertical with the axial line of drilling rod 1.In other embodiments, wing plate can be also two, four, five, six, seven or eight or multi-disc more.Described leaf formula drill bit rib wing plate can carry out uniform stirring to the soil body, can by return soil body uniform stirring and form and stablize cylinder.
The angle of penetration b of leaf formula drill bit rib wing plate is 16 while spending, result of use is best.
In the present embodiment, the angle of penetration that drill bit blade row alloy bores tooth 7 is 15 degree～30 degree; The spacing that drill bit blade row alloy bores between tooth 7 is 15 centimetres.Apart from a 410cm place that advances, drill bit blade row 5 is set, apart from advancing, a 500cm place arranges drill bit rib wing plate 6.
Take certain experimental project as example, this experimental project is about 600m apart from riverbed, and original landforms genus rushes big vast I level terrace, Wei Yizheng commercial land, west side, place, outside the red line of north side, five meters is wholesale of small articles market, southern side is planning road, and east side is a gat, and northeast corner has one three floor house owed by a citizen and public lavatory, the about 440m of foundation ditch overall circumference, dark 9.2m～12.8m is dug on basis, and underground two-layer basement is 5 22～27 floor high residential buildings on the ground.
Excavation of foundation pit open ground situation, has from top to bottom: miscellaneous fill, silty clay, mucky soil, coarse sand, silty clay, coarse sand, gravel layer, residual soil, be completely decomposed granite, strong weathered granite etc. below.Place belongs to discharge area of groundwater, affect groundwater type in the place of foundation pit construction and is mainly hole diving, the side direction supply of the interior artesian water of coarse sands layer and Bedrock Crevice Water ，Shu runoff district ，Shou adjacent area underground water and Atmospheric precipitation infiltration supply.According to geologic information: miscellaneous fill is permeable aquifer, coarse sand, circle gravel are highly permeable aquifer, silty clay and mucky soil belong to relative water resisting layer, bedrock weathering zone is reticulated cracks water, its watery and water permeability are relevant with development degree and the crack character in its crack, crack is main mainly with closed crack, and watery is generally poor.
About the intercept water type selecting of scheme of this experimental project, because this experimental project geology is comparatively complicated, groundwater table is abundant, and Groundwater Flow is larger, the type selecting of the mode that intercepts water, parameter definite most important, careless slightlyly will cause fatal harm to surrounding building etc., the type selecting of structure and design so intercept water, need emphasis to consider the consequence of leaking, the soil nature in aquifer, underground water characteristic, supporting and protection structure form, the factors such as execution conditions, serious (as building for the consequence of leaking, communal facility destruction etc.) foundation ditch, to construction quality without the structure that intercepts water of very holding, as the structure that intercepts water of cement-soil series should not be less than twice defence line, the structure construction technique that intercepts water of selecting need be applicable to the formation characteristics in place, the foundation ditch intercepting water, and the Deformation Control Design of supporting and protection structure is still needed and is considered to intercept water the non-deformability of structure, and supporting and protection structure or soil deformation are crossed conference and are caused the structure crack that intercepts water, and cause leaking.In sum, this experimental project finally selects SMW engineering method stake+passive area Stabilizing Grout as the structure that intercepts water, and plays retaining support effect simultaneously.
This experimental project adopts PHC prestressed pipe pile foundation, in tube pile construction process, already soil layer bottom relative water resisting layer (farinose argillic horizon) is broken, if water-stop curtain does not reach below gravel layer, hole in or hole outer highly permeable layer (gravel layer, layer of sand) must see through pile tube sidewall water burst, this will directly affect the quality on main body experimental project basis.In addition, while carrying out dewatering construction in hole, dewatering well own is just broken farinose argillic horizon, after during precipitation, the following layer of sand of farinose argillic horizon, gravel layer underground water are emptied, will inevitably cause that the upper strata soil body sinks, if the water-stop curtain that at this moment engineering method stake forms just penetrates farinose argillic horizon, and farinose argillic horizon will be because sedimentation will directly cause water-stop curtain to lose efficacy.
About deep foundation ditch experimental project, especially this experimental project, groundwater table is abundant, layer of sand is thicker again, if there is defect leak in waterproof of man sealing, to in foundation ditch by force when precipitation, the peripheral underground water of foundation ditch can pour in foundation ditch, and is attended by drift sand and manifests, and foundation ditch periphery is easy to occur sedimentation, the peril such as surface collapse even.Although farinose argillic horizon is as relative water resisting layer, Soil-cement Wall just can play the effect of sealing through farinose argillic horizon, but in this experimental project, farinose argillic horizon is relatively thin, for preventing occurring slippage, protuberance phenomenon in dewatering construction process, design must determine agitation pile is penetrated to gravel layer, and the passive soil body is carried out to grouting and reinforcing, and when preventing precipitation, passive area layer of sand is drained and occurred the slippage phenomenon of collapsing.
In the construction stage, SMW engineering method stake waterproof of man construction (Soil Mixing Wall engineering method) is not a strange construction technology.When this experimental project is constructed in earlier stage, upper soil horizon pore-forming is all normal, and as hole depth, during to-16.5m～17.8m, subsidence velocity is obviously slack-off, and electric current increases suddenly and surpasses 450A, and stake end 2m～4m pore-forming time reaches 2 hours, and grouting amount surpasses 40000L.After pile, find that three axle drill bits, drilling tool heavy wear cannot continue construction.We know to analyze reason, the soil layers such as shaped steel Soil-cement Wall (stake of SMW engineering method) pattern foundation pit supporting structure experimental project is applicable to banket, mucky soil, cohesive soil, silt, sandy soil, saturated loess, and be not suitable for the hard soil properties such as gravel layer, completely decomposed granite.This experimental project-12.5m～25.5m is distributed with gravel layer soil property, thickness reaches 2m～8m, the granule content of circle gravel particle diameter > 2mm is 59.4～80.1%, and particle diameter 30～60mm granule content is 4.1～10.2%, and site operation also finds that gravel layer grain diameter is greater than 60mm.-17.5m～25.5m is distributed with completely decomposed granite soil layer, and thickness reaches 2m～15m.
From above, learn, Geological Reasons and SWM engineering method pile driving construction condition restriction are the main causes that difficulty of construction is large.Layer of sand, gravel layer are thicker, when construction during to this soil layer screw type bit by soil layer to pressing down, when soil layer is pressed tighter and tighter, sink difficult and to drill bit well damage.In view of above condition of construction, constructor, by the utility model, successfully tests and has completed pattern foundation pit supporting structure and the water-stop curtain experimental project of this experimental project.
The construction of precipitation and soil excavation is the most direct method of check waterproof of man construction effect, and waterproof of man construction is more successful, and in hole, the outer water level in the very fast hole of precipitation will remain unchanged substantially, and soil excavation is smooth.During this experimental project soil excavation, substantially have no underground water burst phenomenon, construct more smooth.
Claims (4)
1. three axle mixer drill bits that are applicable to penetrate gravel layer soil property, comprise the drilling rod (1) that is built-in with slip casting steel pipe, and the afterbody of drilling rod (1) is provided with the interpolation type joint (2) that is connected use with the pile driving frame of three axle mixers, it is characterized in that:
The head of drilling rod (1) is provided with the head (4) that advances, and the drilling rod (1) at head (4) rear of advancing is provided with drill bit blade row (5), and the drilling rod (1) at drill bit blade row (5) rear is provided with drill bit rib wing plate (6);
The described leaf formula taper that formed by three to five blades of head (4) of the advancing head that advances, these three to five blades are radially uniformly distributed round the axial line of drilling rod, and the blade of blade is provided with one to three alloy brill tooth (3) that advances;
The leaf formula drill bit blade row that described drill bit blade row (5) is comprised of two to eight blade rows, blade row is 20 degree～25 degree to the inclination of drilling rod afterbody and angle of penetration, blade row becomes the angle of 63 degree～68 degree with the axial line of drilling rod (1), the blade of blade row is provided with two to five drill bit blade row alloys and bores tooth (7);
The leaf formula drill bit rib wing plate that described drill bit rib wing plate (6) is comprised of two to eight wing plates, wing plate is 15 degree～20 degree to boring bar head inclination and angle of penetration, wing plate is relative vertical with the axial line of drilling rod (1).
2. a kind of three axle mixer drill bits that are applicable to penetrate gravel layer soil property according to claim 1, is characterized in that: the angle of penetration that described drill bit blade row alloy bores tooth (7) is 15 degree～30 degree.
3. a kind of three axle mixer drill bits that are applicable to penetrate gravel layer soil property according to claim 1, is characterized in that: the spacing that described drill bit blade row alloy bores between tooth (7) is 15 centimetres.
4. a kind of three axle mixer drill bits that are applicable to penetrate gravel layer soil property according to claim 1, is characterized in that: described interpolation type joint (2) is the tool joint of interpolation type hexagonal or inner inserting type spiral joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320517024.5U CN203463016U (en) | 2013-08-23 | 2013-08-23 | Three-axle agitator drill suitable for piercing gravel layer soil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320517024.5U CN203463016U (en) | 2013-08-23 | 2013-08-23 | Three-axle agitator drill suitable for piercing gravel layer soil |
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| CN203463016U true CN203463016U (en) | 2014-03-05 |
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| CN201320517024.5U Expired - Fee Related CN203463016U (en) | 2013-08-23 | 2013-08-23 | Three-axle agitator drill suitable for piercing gravel layer soil |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437712B (en) * | 2013-08-23 | 2015-11-25 | 中国建筑一局(集团)有限公司 | A kind ofly be applicable to the three axle mixer drill bits penetrating gravel layer soil property |
| CN105648886A (en) * | 2014-09-18 | 2016-06-08 | 高田华 | Subgrade soil stirring and material-spraying modified device and construction method thereof |
| CN106089084A (en) * | 2016-08-08 | 2016-11-09 | 浙江绩丰岩土技术股份有限公司 | A kind of super three axes agitating pile of pebble layer and stirring means thereof |
| CN110566128A (en) * | 2019-08-22 | 2019-12-13 | 北京东地岩土工程有限公司 | Cobble stratum soil nail drilling equipment |
| CN111519640A (en) * | 2020-05-27 | 2020-08-11 | 哈尔滨工业大学 | Anchor rod supporting structure for reinforcing railway embankment side slope and construction method thereof |
-
2013
- 2013-08-23 CN CN201320517024.5U patent/CN203463016U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437712B (en) * | 2013-08-23 | 2015-11-25 | 中国建筑一局(集团)有限公司 | A kind ofly be applicable to the three axle mixer drill bits penetrating gravel layer soil property |
| CN105648886A (en) * | 2014-09-18 | 2016-06-08 | 高田华 | Subgrade soil stirring and material-spraying modified device and construction method thereof |
| CN105648886B (en) * | 2014-09-18 | 2017-09-08 | 深圳市孺子牛建设工程有限公司 | A kind of subgrade soils stir material spray modification method |
| CN106089084A (en) * | 2016-08-08 | 2016-11-09 | 浙江绩丰岩土技术股份有限公司 | A kind of super three axes agitating pile of pebble layer and stirring means thereof |
| CN110566128A (en) * | 2019-08-22 | 2019-12-13 | 北京东地岩土工程有限公司 | Cobble stratum soil nail drilling equipment |
| CN111519640A (en) * | 2020-05-27 | 2020-08-11 | 哈尔滨工业大学 | Anchor rod supporting structure for reinforcing railway embankment side slope and construction method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20170823 |